diff options
Diffstat (limited to 'third_party/rust/nom/src')
28 files changed, 17007 insertions, 0 deletions
diff --git a/third_party/rust/nom/src/bits/complete.rs b/third_party/rust/nom/src/bits/complete.rs new file mode 100644 index 0000000000..bf36dcc2aa --- /dev/null +++ b/third_party/rust/nom/src/bits/complete.rs @@ -0,0 +1,197 @@ +//! Bit level parsers +//! + +use crate::error::{ErrorKind, ParseError}; +use crate::internal::{Err, IResult}; +use crate::lib::std::ops::{AddAssign, Div, RangeFrom, Shl, Shr}; +use crate::traits::{InputIter, InputLength, Slice, ToUsize}; + +/// Generates a parser taking `count` bits +/// +/// # Example +/// ```rust +/// # use nom::bits::complete::take; +/// # use nom::IResult; +/// # use nom::error::{Error, ErrorKind}; +/// // Input is a tuple of (input: I, bit_offset: usize) +/// fn parser(input: (&[u8], usize), count: usize)-> IResult<(&[u8], usize), u8> { +/// take(count)(input) +/// } +/// +/// // Consumes 0 bits, returns 0 +/// assert_eq!(parser(([0b00010010].as_ref(), 0), 0), Ok((([0b00010010].as_ref(), 0), 0))); +/// +/// // Consumes 4 bits, returns their values and increase offset to 4 +/// assert_eq!(parser(([0b00010010].as_ref(), 0), 4), Ok((([0b00010010].as_ref(), 4), 0b00000001))); +/// +/// // Consumes 4 bits, offset is 4, returns their values and increase offset to 0 of next byte +/// assert_eq!(parser(([0b00010010].as_ref(), 4), 4), Ok((([].as_ref(), 0), 0b00000010))); +/// +/// // Tries to consume 12 bits but only 8 are available +/// assert_eq!(parser(([0b00010010].as_ref(), 0), 12), Err(nom::Err::Error(Error{input: ([0b00010010].as_ref(), 0), code: ErrorKind::Eof }))); +/// ``` +pub fn take<I, O, C, E: ParseError<(I, usize)>>( + count: C, +) -> impl Fn((I, usize)) -> IResult<(I, usize), O, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, + C: ToUsize, + O: From<u8> + AddAssign + Shl<usize, Output = O> + Shr<usize, Output = O>, +{ + let count = count.to_usize(); + move |(input, bit_offset): (I, usize)| { + if count == 0 { + Ok(((input, bit_offset), 0u8.into())) + } else { + let cnt = (count + bit_offset).div(8); + if input.input_len() * 8 < count + bit_offset { + Err(Err::Error(E::from_error_kind( + (input, bit_offset), + ErrorKind::Eof, + ))) + } else { + let mut acc: O = 0_u8.into(); + let mut offset: usize = bit_offset; + let mut remaining: usize = count; + let mut end_offset: usize = 0; + + for byte in input.iter_elements().take(cnt + 1) { + if remaining == 0 { + break; + } + let val: O = if offset == 0 { + byte.into() + } else { + ((byte << offset) as u8 >> offset).into() + }; + + if remaining < 8 - offset { + acc += val >> (8 - offset - remaining); + end_offset = remaining + offset; + break; + } else { + acc += val << (remaining - (8 - offset)); + remaining -= 8 - offset; + offset = 0; + } + } + Ok(((input.slice(cnt..), end_offset), acc)) + } + } + } +} + +/// Generates a parser taking `count` bits and comparing them to `pattern` +pub fn tag<I, O, C, E: ParseError<(I, usize)>>( + pattern: O, + count: C, +) -> impl Fn((I, usize)) -> IResult<(I, usize), O, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength + Clone, + C: ToUsize, + O: From<u8> + AddAssign + Shl<usize, Output = O> + Shr<usize, Output = O> + PartialEq, +{ + let count = count.to_usize(); + move |input: (I, usize)| { + let inp = input.clone(); + + take(count)(input).and_then(|(i, o)| { + if pattern == o { + Ok((i, o)) + } else { + Err(Err::Error(error_position!(inp, ErrorKind::TagBits))) + } + }) + } +} + +/// Parses one specific bit as a bool. +/// +/// # Example +/// ```rust +/// # use nom::bits::complete::bool; +/// # use nom::IResult; +/// # use nom::error::{Error, ErrorKind}; +/// +/// fn parse(input: (&[u8], usize)) -> IResult<(&[u8], usize), bool> { +/// bool(input) +/// } +/// +/// assert_eq!(parse(([0b10000000].as_ref(), 0)), Ok((([0b10000000].as_ref(), 1), true))); +/// assert_eq!(parse(([0b10000000].as_ref(), 1)), Ok((([0b10000000].as_ref(), 2), false))); +/// ``` +pub fn bool<I, E: ParseError<(I, usize)>>(input: (I, usize)) -> IResult<(I, usize), bool, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let (res, bit): (_, u32) = take(1usize)(input)?; + Ok((res, bit != 0)) +} + +#[cfg(test)] +mod test { + use super::*; + + #[test] + fn test_take_0() { + let input = [0b00010010].as_ref(); + let count = 0usize; + assert_eq!(count, 0usize); + let offset = 0usize; + + let result: crate::IResult<(&[u8], usize), usize> = take(count)((input, offset)); + + assert_eq!(result, Ok(((input, offset), 0))); + } + + #[test] + fn test_take_eof() { + let input = [0b00010010].as_ref(); + + let result: crate::IResult<(&[u8], usize), usize> = take(1usize)((input, 8)); + + assert_eq!( + result, + Err(crate::Err::Error(crate::error::Error { + input: (input, 8), + code: ErrorKind::Eof + })) + ) + } + + #[test] + fn test_take_span_over_multiple_bytes() { + let input = [0b00010010, 0b00110100, 0b11111111, 0b11111111].as_ref(); + + let result: crate::IResult<(&[u8], usize), usize> = take(24usize)((input, 4)); + + assert_eq!( + result, + Ok((([0b11111111].as_ref(), 4), 0b1000110100111111111111)) + ); + } + + #[test] + fn test_bool_0() { + let input = [0b10000000].as_ref(); + + let result: crate::IResult<(&[u8], usize), bool> = bool((input, 0)); + + assert_eq!(result, Ok(((input, 1), true))); + } + + #[test] + fn test_bool_eof() { + let input = [0b10000000].as_ref(); + + let result: crate::IResult<(&[u8], usize), bool> = bool((input, 8)); + + assert_eq!( + result, + Err(crate::Err::Error(crate::error::Error { + input: (input, 8), + code: ErrorKind::Eof + })) + ); + } +} diff --git a/third_party/rust/nom/src/bits/mod.rs b/third_party/rust/nom/src/bits/mod.rs new file mode 100644 index 0000000000..0d3f73db25 --- /dev/null +++ b/third_party/rust/nom/src/bits/mod.rs @@ -0,0 +1,179 @@ +//! Bit level parsers +//! + +pub mod complete; +pub mod streaming; + +use crate::error::{ErrorKind, ParseError}; +use crate::internal::{Err, IResult, Needed, Parser}; +use crate::lib::std::ops::RangeFrom; +use crate::traits::{ErrorConvert, Slice}; + +/// Converts a byte-level input to a bit-level input, for consumption by a parser that uses bits. +/// +/// Afterwards, the input is converted back to a byte-level parser, with any remaining bits thrown +/// away. +/// +/// # Example +/// ``` +/// use nom::bits::{bits, streaming::take}; +/// use nom::error::Error; +/// use nom::sequence::tuple; +/// use nom::IResult; +/// +/// fn parse(input: &[u8]) -> IResult<&[u8], (u8, u8)> { +/// bits::<_, _, Error<(&[u8], usize)>, _, _>(tuple((take(4usize), take(8usize))))(input) +/// } +/// +/// let input = &[0x12, 0x34, 0xff, 0xff]; +/// +/// let output = parse(input).expect("We take 1.5 bytes and the input is longer than 2 bytes"); +/// +/// // The first byte is consumed, the second byte is partially consumed and dropped. +/// let remaining = output.0; +/// assert_eq!(remaining, [0xff, 0xff]); +/// +/// let parsed = output.1; +/// assert_eq!(parsed.0, 0x01); +/// assert_eq!(parsed.1, 0x23); +/// ``` +pub fn bits<I, O, E1, E2, P>(mut parser: P) -> impl FnMut(I) -> IResult<I, O, E2> +where + E1: ParseError<(I, usize)> + ErrorConvert<E2>, + E2: ParseError<I>, + I: Slice<RangeFrom<usize>>, + P: Parser<(I, usize), O, E1>, +{ + move |input: I| match parser.parse((input, 0)) { + Ok(((rest, offset), result)) => { + // If the next byte has been partially read, it will be sliced away as well. + // The parser functions might already slice away all fully read bytes. + // That's why `offset / 8` isn't necessarily needed at all times. + let remaining_bytes_index = offset / 8 + if offset % 8 == 0 { 0 } else { 1 }; + Ok((rest.slice(remaining_bytes_index..), result)) + } + Err(Err::Incomplete(n)) => Err(Err::Incomplete(n.map(|u| u.get() / 8 + 1))), + Err(Err::Error(e)) => Err(Err::Error(e.convert())), + Err(Err::Failure(e)) => Err(Err::Failure(e.convert())), + } +} + +/// Counterpart to `bits`, `bytes` transforms its bit stream input into a byte slice for the underlying +/// parser, allowing byte-slice parsers to work on bit streams. +/// +/// A partial byte remaining in the input will be ignored and the given parser will start parsing +/// at the next full byte. +/// +/// ``` +/// use nom::bits::{bits, bytes, streaming::take}; +/// use nom::combinator::rest; +/// use nom::error::Error; +/// use nom::sequence::tuple; +/// use nom::IResult; +/// +/// fn parse(input: &[u8]) -> IResult<&[u8], (u8, u8, &[u8])> { +/// bits::<_, _, Error<(&[u8], usize)>, _, _>(tuple(( +/// take(4usize), +/// take(8usize), +/// bytes::<_, _, Error<&[u8]>, _, _>(rest) +/// )))(input) +/// } +/// +/// let input = &[0x12, 0x34, 0xff, 0xff]; +/// +/// assert_eq!(parse( input ), Ok(( &[][..], (0x01, 0x23, &[0xff, 0xff][..]) ))); +/// ``` +pub fn bytes<I, O, E1, E2, P>(mut parser: P) -> impl FnMut((I, usize)) -> IResult<(I, usize), O, E2> +where + E1: ParseError<I> + ErrorConvert<E2>, + E2: ParseError<(I, usize)>, + I: Slice<RangeFrom<usize>> + Clone, + P: Parser<I, O, E1>, +{ + move |(input, offset): (I, usize)| { + let inner = if offset % 8 != 0 { + input.slice((1 + offset / 8)..) + } else { + input.slice((offset / 8)..) + }; + let i = (input, offset); + match parser.parse(inner) { + Ok((rest, res)) => Ok(((rest, 0), res)), + Err(Err::Incomplete(Needed::Unknown)) => Err(Err::Incomplete(Needed::Unknown)), + Err(Err::Incomplete(Needed::Size(sz))) => Err(match sz.get().checked_mul(8) { + Some(v) => Err::Incomplete(Needed::new(v)), + None => Err::Failure(E2::from_error_kind(i, ErrorKind::TooLarge)), + }), + Err(Err::Error(e)) => Err(Err::Error(e.convert())), + Err(Err::Failure(e)) => Err(Err::Failure(e.convert())), + } + } +} + +#[cfg(test)] +mod test { + use super::*; + use crate::bits::streaming::take; + use crate::error::Error; + use crate::sequence::tuple; + + #[test] + /// Take the `bits` function and assert that remaining bytes are correctly returned, if the + /// previous bytes are fully consumed + fn test_complete_byte_consumption_bits() { + let input = &[0x12, 0x34, 0x56, 0x78]; + + // Take 3 bit slices with sizes [4, 8, 4]. + let result: IResult<&[u8], (u8, u8, u8)> = + bits::<_, _, Error<(&[u8], usize)>, _, _>(tuple((take(4usize), take(8usize), take(4usize))))( + input, + ); + + let output = result.expect("We take 2 bytes and the input is longer than 2 bytes"); + + let remaining = output.0; + assert_eq!(remaining, [0x56, 0x78]); + + let parsed = output.1; + assert_eq!(parsed.0, 0x01); + assert_eq!(parsed.1, 0x23); + assert_eq!(parsed.2, 0x04); + } + + #[test] + /// Take the `bits` function and assert that remaining bytes are correctly returned, if the + /// previous bytes are NOT fully consumed. Partially consumed bytes are supposed to be dropped. + /// I.e. if we consume 1.5 bytes of 4 bytes, 2 bytes will be returned, bits 13-16 will be + /// dropped. + fn test_partial_byte_consumption_bits() { + let input = &[0x12, 0x34, 0x56, 0x78]; + + // Take bit slices with sizes [4, 8]. + let result: IResult<&[u8], (u8, u8)> = + bits::<_, _, Error<(&[u8], usize)>, _, _>(tuple((take(4usize), take(8usize))))(input); + + let output = result.expect("We take 1.5 bytes and the input is longer than 2 bytes"); + + let remaining = output.0; + assert_eq!(remaining, [0x56, 0x78]); + + let parsed = output.1; + assert_eq!(parsed.0, 0x01); + assert_eq!(parsed.1, 0x23); + } + + #[test] + #[cfg(feature = "std")] + /// Ensure that in Incomplete error is thrown, if too few bytes are passed for a given parser. + fn test_incomplete_bits() { + let input = &[0x12]; + + // Take bit slices with sizes [4, 8]. + let result: IResult<&[u8], (u8, u8)> = + bits::<_, _, Error<(&[u8], usize)>, _, _>(tuple((take(4usize), take(8usize))))(input); + + assert!(result.is_err()); + let error = result.err().unwrap(); + assert_eq!("Parsing requires 2 bytes/chars", error.to_string()); + } +} diff --git a/third_party/rust/nom/src/bits/streaming.rs b/third_party/rust/nom/src/bits/streaming.rs new file mode 100644 index 0000000000..a7c8d0a67b --- /dev/null +++ b/third_party/rust/nom/src/bits/streaming.rs @@ -0,0 +1,170 @@ +//! Bit level parsers +//! + +use crate::error::{ErrorKind, ParseError}; +use crate::internal::{Err, IResult, Needed}; +use crate::lib::std::ops::{AddAssign, Div, RangeFrom, Shl, Shr}; +use crate::traits::{InputIter, InputLength, Slice, ToUsize}; + +/// Generates a parser taking `count` bits +pub fn take<I, O, C, E: ParseError<(I, usize)>>( + count: C, +) -> impl Fn((I, usize)) -> IResult<(I, usize), O, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, + C: ToUsize, + O: From<u8> + AddAssign + Shl<usize, Output = O> + Shr<usize, Output = O>, +{ + let count = count.to_usize(); + move |(input, bit_offset): (I, usize)| { + if count == 0 { + Ok(((input, bit_offset), 0u8.into())) + } else { + let cnt = (count + bit_offset).div(8); + if input.input_len() * 8 < count + bit_offset { + Err(Err::Incomplete(Needed::new(count as usize))) + } else { + let mut acc: O = 0_u8.into(); + let mut offset: usize = bit_offset; + let mut remaining: usize = count; + let mut end_offset: usize = 0; + + for byte in input.iter_elements().take(cnt + 1) { + if remaining == 0 { + break; + } + let val: O = if offset == 0 { + byte.into() + } else { + ((byte << offset) as u8 >> offset).into() + }; + + if remaining < 8 - offset { + acc += val >> (8 - offset - remaining); + end_offset = remaining + offset; + break; + } else { + acc += val << (remaining - (8 - offset)); + remaining -= 8 - offset; + offset = 0; + } + } + Ok(((input.slice(cnt..), end_offset), acc)) + } + } + } +} + +/// Generates a parser taking `count` bits and comparing them to `pattern` +pub fn tag<I, O, C, E: ParseError<(I, usize)>>( + pattern: O, + count: C, +) -> impl Fn((I, usize)) -> IResult<(I, usize), O, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength + Clone, + C: ToUsize, + O: From<u8> + AddAssign + Shl<usize, Output = O> + Shr<usize, Output = O> + PartialEq, +{ + let count = count.to_usize(); + move |input: (I, usize)| { + let inp = input.clone(); + + take(count)(input).and_then(|(i, o)| { + if pattern == o { + Ok((i, o)) + } else { + Err(Err::Error(error_position!(inp, ErrorKind::TagBits))) + } + }) + } +} + +/// Parses one specific bit as a bool. +/// +/// # Example +/// ```rust +/// # use nom::bits::complete::bool; +/// # use nom::IResult; +/// # use nom::error::{Error, ErrorKind}; +/// +/// fn parse(input: (&[u8], usize)) -> IResult<(&[u8], usize), bool> { +/// bool(input) +/// } +/// +/// assert_eq!(parse(([0b10000000].as_ref(), 0)), Ok((([0b10000000].as_ref(), 1), true))); +/// assert_eq!(parse(([0b10000000].as_ref(), 1)), Ok((([0b10000000].as_ref(), 2), false))); +/// ``` +pub fn bool<I, E: ParseError<(I, usize)>>(input: (I, usize)) -> IResult<(I, usize), bool, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let (res, bit): (_, u32) = take(1usize)(input)?; + Ok((res, bit != 0)) +} + +#[cfg(test)] +mod test { + use super::*; + + #[test] + fn test_take_0() { + let input = [].as_ref(); + let count = 0usize; + assert_eq!(count, 0usize); + let offset = 0usize; + + let result: crate::IResult<(&[u8], usize), usize> = take(count)((input, offset)); + + assert_eq!(result, Ok(((input, offset), 0))); + } + + #[test] + fn test_tag_ok() { + let input = [0b00011111].as_ref(); + let offset = 0usize; + let bits_to_take = 4usize; + let value_to_tag = 0b0001; + + let result: crate::IResult<(&[u8], usize), usize> = + tag(value_to_tag, bits_to_take)((input, offset)); + + assert_eq!(result, Ok(((input, bits_to_take), value_to_tag))); + } + + #[test] + fn test_tag_err() { + let input = [0b00011111].as_ref(); + let offset = 0usize; + let bits_to_take = 4usize; + let value_to_tag = 0b1111; + + let result: crate::IResult<(&[u8], usize), usize> = + tag(value_to_tag, bits_to_take)((input, offset)); + + assert_eq!( + result, + Err(crate::Err::Error(crate::error::Error { + input: (input, offset), + code: ErrorKind::TagBits + })) + ); + } + + #[test] + fn test_bool_0() { + let input = [0b10000000].as_ref(); + + let result: crate::IResult<(&[u8], usize), bool> = bool((input, 0)); + + assert_eq!(result, Ok(((input, 1), true))); + } + + #[test] + fn test_bool_eof() { + let input = [0b10000000].as_ref(); + + let result: crate::IResult<(&[u8], usize), bool> = bool((input, 8)); + + assert_eq!(result, Err(crate::Err::Incomplete(Needed::new(1)))); + } +} diff --git a/third_party/rust/nom/src/branch/mod.rs b/third_party/rust/nom/src/branch/mod.rs new file mode 100644 index 0000000000..e03622cb0c --- /dev/null +++ b/third_party/rust/nom/src/branch/mod.rs @@ -0,0 +1,267 @@ +//! Choice combinators + +#[cfg(test)] +mod tests; + +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Parser}; + +/// Helper trait for the [alt()] combinator. +/// +/// This trait is implemented for tuples of up to 21 elements +pub trait Alt<I, O, E> { + /// Tests each parser in the tuple and returns the result of the first one that succeeds + fn choice(&mut self, input: I) -> IResult<I, O, E>; +} + +/// Tests a list of parsers one by one until one succeeds. +/// +/// It takes as argument a tuple of parsers. There is a maximum of 21 +/// parsers. If you need more, it is possible to nest them in other `alt` calls, +/// like this: `alt(parser_a, alt(parser_b, parser_c))` +/// +/// ```rust +/// # use nom::error_position; +/// # use nom::{Err,error::ErrorKind, Needed, IResult}; +/// use nom::character::complete::{alpha1, digit1}; +/// use nom::branch::alt; +/// # fn main() { +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alt((alpha1, digit1))(input) +/// }; +/// +/// // the first parser, alpha1, recognizes the input +/// assert_eq!(parser("abc"), Ok(("", "abc"))); +/// +/// // the first parser returns an error, so alt tries the second one +/// assert_eq!(parser("123456"), Ok(("", "123456"))); +/// +/// // both parsers failed, and with the default error type, alt will return the last error +/// assert_eq!(parser(" "), Err(Err::Error(error_position!(" ", ErrorKind::Digit)))); +/// # } +/// ``` +/// +/// With a custom error type, it is possible to have alt return the error of the parser +/// that went the farthest in the input data +pub fn alt<I: Clone, O, E: ParseError<I>, List: Alt<I, O, E>>( + mut l: List, +) -> impl FnMut(I) -> IResult<I, O, E> { + move |i: I| l.choice(i) +} + +/// Helper trait for the [permutation()] combinator. +/// +/// This trait is implemented for tuples of up to 21 elements +pub trait Permutation<I, O, E> { + /// Tries to apply all parsers in the tuple in various orders until all of them succeed + fn permutation(&mut self, input: I) -> IResult<I, O, E>; +} + +/// Applies a list of parsers in any order. +/// +/// Permutation will succeed if all of the child parsers succeeded. +/// It takes as argument a tuple of parsers, and returns a +/// tuple of the parser results. +/// +/// ```rust +/// # use nom::{Err,error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::character::complete::{alpha1, digit1}; +/// use nom::branch::permutation; +/// # fn main() { +/// fn parser(input: &str) -> IResult<&str, (&str, &str)> { +/// permutation((alpha1, digit1))(input) +/// } +/// +/// // permutation recognizes alphabetic characters then digit +/// assert_eq!(parser("abc123"), Ok(("", ("abc", "123")))); +/// +/// // but also in inverse order +/// assert_eq!(parser("123abc"), Ok(("", ("abc", "123")))); +/// +/// // it will fail if one of the parsers failed +/// assert_eq!(parser("abc;"), Err(Err::Error(Error::new(";", ErrorKind::Digit)))); +/// # } +/// ``` +/// +/// The parsers are applied greedily: if there are multiple unapplied parsers +/// that could parse the next slice of input, the first one is used. +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, IResult}; +/// use nom::branch::permutation; +/// use nom::character::complete::{anychar, char}; +/// +/// fn parser(input: &str) -> IResult<&str, (char, char)> { +/// permutation((anychar, char('a')))(input) +/// } +/// +/// // anychar parses 'b', then char('a') parses 'a' +/// assert_eq!(parser("ba"), Ok(("", ('b', 'a')))); +/// +/// // anychar parses 'a', then char('a') fails on 'b', +/// // even though char('a') followed by anychar would succeed +/// assert_eq!(parser("ab"), Err(Err::Error(Error::new("b", ErrorKind::Char)))); +/// ``` +/// +pub fn permutation<I: Clone, O, E: ParseError<I>, List: Permutation<I, O, E>>( + mut l: List, +) -> impl FnMut(I) -> IResult<I, O, E> { + move |i: I| l.permutation(i) +} + +macro_rules! alt_trait( + ($first:ident $second:ident $($id: ident)+) => ( + alt_trait!(__impl $first $second; $($id)+); + ); + (__impl $($current:ident)*; $head:ident $($id: ident)+) => ( + alt_trait_impl!($($current)*); + + alt_trait!(__impl $($current)* $head; $($id)+); + ); + (__impl $($current:ident)*; $head:ident) => ( + alt_trait_impl!($($current)*); + alt_trait_impl!($($current)* $head); + ); +); + +macro_rules! alt_trait_impl( + ($($id:ident)+) => ( + impl< + Input: Clone, Output, Error: ParseError<Input>, + $($id: Parser<Input, Output, Error>),+ + > Alt<Input, Output, Error> for ( $($id),+ ) { + + fn choice(&mut self, input: Input) -> IResult<Input, Output, Error> { + match self.0.parse(input.clone()) { + Err(Err::Error(e)) => alt_trait_inner!(1, self, input, e, $($id)+), + res => res, + } + } + } + ); +); + +macro_rules! alt_trait_inner( + ($it:tt, $self:expr, $input:expr, $err:expr, $head:ident $($id:ident)+) => ( + match $self.$it.parse($input.clone()) { + Err(Err::Error(e)) => { + let err = $err.or(e); + succ!($it, alt_trait_inner!($self, $input, err, $($id)+)) + } + res => res, + } + ); + ($it:tt, $self:expr, $input:expr, $err:expr, $head:ident) => ( + Err(Err::Error(Error::append($input, ErrorKind::Alt, $err))) + ); +); + +alt_trait!(A B C D E F G H I J K L M N O P Q R S T U); + +// Manually implement Alt for (A,), the 1-tuple type +impl<Input, Output, Error: ParseError<Input>, A: Parser<Input, Output, Error>> + Alt<Input, Output, Error> for (A,) +{ + fn choice(&mut self, input: Input) -> IResult<Input, Output, Error> { + self.0.parse(input) + } +} + +macro_rules! permutation_trait( + ( + $name1:ident $ty1:ident $item1:ident + $name2:ident $ty2:ident $item2:ident + $($name3:ident $ty3:ident $item3:ident)* + ) => ( + permutation_trait!(__impl $name1 $ty1 $item1, $name2 $ty2 $item2; $($name3 $ty3 $item3)*); + ); + ( + __impl $($name:ident $ty:ident $item:ident),+; + $name1:ident $ty1:ident $item1:ident $($name2:ident $ty2:ident $item2:ident)* + ) => ( + permutation_trait_impl!($($name $ty $item),+); + permutation_trait!(__impl $($name $ty $item),+ , $name1 $ty1 $item1; $($name2 $ty2 $item2)*); + ); + (__impl $($name:ident $ty:ident $item:ident),+;) => ( + permutation_trait_impl!($($name $ty $item),+); + ); +); + +macro_rules! permutation_trait_impl( + ($($name:ident $ty:ident $item:ident),+) => ( + impl< + Input: Clone, $($ty),+ , Error: ParseError<Input>, + $($name: Parser<Input, $ty, Error>),+ + > Permutation<Input, ( $($ty),+ ), Error> for ( $($name),+ ) { + + fn permutation(&mut self, mut input: Input) -> IResult<Input, ( $($ty),+ ), Error> { + let mut res = ($(Option::<$ty>::None),+); + + loop { + let mut err: Option<Error> = None; + permutation_trait_inner!(0, self, input, res, err, $($name)+); + + // If we reach here, every iterator has either been applied before, + // or errored on the remaining input + if let Some(err) = err { + // There are remaining parsers, and all errored on the remaining input + return Err(Err::Error(Error::append(input, ErrorKind::Permutation, err))); + } + + // All parsers were applied + match res { + ($(Some($item)),+) => return Ok((input, ($($item),+))), + _ => unreachable!(), + } + } + } + } + ); +); + +macro_rules! permutation_trait_inner( + ($it:tt, $self:expr, $input:ident, $res:expr, $err:expr, $head:ident $($id:ident)*) => ( + if $res.$it.is_none() { + match $self.$it.parse($input.clone()) { + Ok((i, o)) => { + $input = i; + $res.$it = Some(o); + continue; + } + Err(Err::Error(e)) => { + $err = Some(match $err { + Some(err) => err.or(e), + None => e, + }); + } + Err(e) => return Err(e), + }; + } + succ!($it, permutation_trait_inner!($self, $input, $res, $err, $($id)*)); + ); + ($it:tt, $self:expr, $input:ident, $res:expr, $err:expr,) => (); +); + +permutation_trait!( + FnA A a + FnB B b + FnC C c + FnD D d + FnE E e + FnF F f + FnG G g + FnH H h + FnI I i + FnJ J j + FnK K k + FnL L l + FnM M m + FnN N n + FnO O o + FnP P p + FnQ Q q + FnR R r + FnS S s + FnT T t + FnU U u +); diff --git a/third_party/rust/nom/src/branch/tests.rs b/third_party/rust/nom/src/branch/tests.rs new file mode 100644 index 0000000000..ecd44407e9 --- /dev/null +++ b/third_party/rust/nom/src/branch/tests.rs @@ -0,0 +1,142 @@ +use crate::branch::{alt, permutation}; +use crate::bytes::streaming::tag; +use crate::error::ErrorKind; +use crate::internal::{Err, IResult, Needed}; +#[cfg(feature = "alloc")] +use crate::{ + error::ParseError, + lib::std::{ + fmt::Debug, + string::{String, ToString}, + }, +}; + +#[cfg(feature = "alloc")] +#[derive(Debug, Clone, PartialEq)] +pub struct ErrorStr(String); + +#[cfg(feature = "alloc")] +impl From<u32> for ErrorStr { + fn from(i: u32) -> Self { + ErrorStr(format!("custom error code: {}", i)) + } +} + +#[cfg(feature = "alloc")] +impl<'a> From<&'a str> for ErrorStr { + fn from(i: &'a str) -> Self { + ErrorStr(format!("custom error message: {}", i)) + } +} + +#[cfg(feature = "alloc")] +impl<I: Debug> ParseError<I> for ErrorStr { + fn from_error_kind(input: I, kind: ErrorKind) -> Self { + ErrorStr(format!("custom error message: ({:?}, {:?})", input, kind)) + } + + fn append(input: I, kind: ErrorKind, other: Self) -> Self { + ErrorStr(format!( + "custom error message: ({:?}, {:?}) - {:?}", + input, kind, other + )) + } +} + +#[cfg(feature = "alloc")] +#[test] +fn alt_test() { + fn work(input: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + Ok((&b""[..], input)) + } + + #[allow(unused_variables)] + fn dont_work(input: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + Err(Err::Error(ErrorStr("abcd".to_string()))) + } + + fn work2(input: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + Ok((input, &b""[..])) + } + + fn alt1(i: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + alt((dont_work, dont_work))(i) + } + fn alt2(i: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + alt((dont_work, work))(i) + } + fn alt3(i: &[u8]) -> IResult<&[u8], &[u8], ErrorStr> { + alt((dont_work, dont_work, work2, dont_work))(i) + } + //named!(alt1, alt!(dont_work | dont_work)); + //named!(alt2, alt!(dont_work | work)); + //named!(alt3, alt!(dont_work | dont_work | work2 | dont_work)); + + let a = &b"abcd"[..]; + assert_eq!( + alt1(a), + Err(Err::Error(error_node_position!( + a, + ErrorKind::Alt, + ErrorStr("abcd".to_string()) + ))) + ); + assert_eq!(alt2(a), Ok((&b""[..], a))); + assert_eq!(alt3(a), Ok((a, &b""[..]))); + + fn alt4(i: &[u8]) -> IResult<&[u8], &[u8]> { + alt((tag("abcd"), tag("efgh")))(i) + } + let b = &b"efgh"[..]; + assert_eq!(alt4(a), Ok((&b""[..], a))); + assert_eq!(alt4(b), Ok((&b""[..], b))); +} + +#[test] +fn alt_incomplete() { + fn alt1(i: &[u8]) -> IResult<&[u8], &[u8]> { + alt((tag("a"), tag("bc"), tag("def")))(i) + } + + let a = &b""[..]; + assert_eq!(alt1(a), Err(Err::Incomplete(Needed::new(1)))); + let a = &b"b"[..]; + assert_eq!(alt1(a), Err(Err::Incomplete(Needed::new(1)))); + let a = &b"bcd"[..]; + assert_eq!(alt1(a), Ok((&b"d"[..], &b"bc"[..]))); + let a = &b"cde"[..]; + assert_eq!(alt1(a), Err(Err::Error(error_position!(a, ErrorKind::Tag)))); + let a = &b"de"[..]; + assert_eq!(alt1(a), Err(Err::Incomplete(Needed::new(1)))); + let a = &b"defg"[..]; + assert_eq!(alt1(a), Ok((&b"g"[..], &b"def"[..]))); +} + +#[test] +fn permutation_test() { + fn perm(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8], &[u8])> { + permutation((tag("abcd"), tag("efg"), tag("hi")))(i) + } + + let expected = (&b"abcd"[..], &b"efg"[..], &b"hi"[..]); + + let a = &b"abcdefghijk"[..]; + assert_eq!(perm(a), Ok((&b"jk"[..], expected))); + let b = &b"efgabcdhijk"[..]; + assert_eq!(perm(b), Ok((&b"jk"[..], expected))); + let c = &b"hiefgabcdjk"[..]; + assert_eq!(perm(c), Ok((&b"jk"[..], expected))); + + let d = &b"efgxyzabcdefghi"[..]; + assert_eq!( + perm(d), + Err(Err::Error(error_node_position!( + &b"efgxyzabcdefghi"[..], + ErrorKind::Permutation, + error_position!(&b"xyzabcdefghi"[..], ErrorKind::Tag) + ))) + ); + + let e = &b"efgabc"[..]; + assert_eq!(perm(e), Err(Err::Incomplete(Needed::new(1)))); +} diff --git a/third_party/rust/nom/src/bytes/complete.rs b/third_party/rust/nom/src/bytes/complete.rs new file mode 100644 index 0000000000..a5442b53f7 --- /dev/null +++ b/third_party/rust/nom/src/bytes/complete.rs @@ -0,0 +1,756 @@ +//! Parsers recognizing bytes streams, complete input version + +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Parser}; +use crate::lib::std::ops::RangeFrom; +use crate::lib::std::result::Result::*; +use crate::traits::{ + Compare, CompareResult, FindSubstring, FindToken, InputIter, InputLength, InputTake, + InputTakeAtPosition, Slice, ToUsize, +}; + +/// Recognizes a pattern +/// +/// The input data will be compared to the tag combinator's argument and will return the part of +/// the input that matches the argument +/// +/// It will return `Err(Err::Error((_, ErrorKind::Tag)))` if the input doesn't match the pattern +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, &str> { +/// tag("Hello")(s) +/// } +/// +/// assert_eq!(parser("Hello, World!"), Ok((", World!", "Hello"))); +/// assert_eq!(parser("Something"), Err(Err::Error(Error::new("Something", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// ``` +pub fn tag<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + Compare<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let tag_len = tag.input_len(); + let t = tag.clone(); + let res: IResult<_, _, Error> = match i.compare(t) { + CompareResult::Ok => Ok(i.take_split(tag_len)), + _ => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(Error::from_error_kind(i, e))) + } + }; + res + } +} + +/// Recognizes a case insensitive pattern. +/// +/// The input data will be compared to the tag combinator's argument and will return the part of +/// the input that matches the argument with no regard to case. +/// +/// It will return `Err(Err::Error((_, ErrorKind::Tag)))` if the input doesn't match the pattern. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::tag_no_case; +/// +/// fn parser(s: &str) -> IResult<&str, &str> { +/// tag_no_case("hello")(s) +/// } +/// +/// assert_eq!(parser("Hello, World!"), Ok((", World!", "Hello"))); +/// assert_eq!(parser("hello, World!"), Ok((", World!", "hello"))); +/// assert_eq!(parser("HeLlO, World!"), Ok((", World!", "HeLlO"))); +/// assert_eq!(parser("Something"), Err(Err::Error(Error::new("Something", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// ``` +pub fn tag_no_case<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + Compare<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let tag_len = tag.input_len(); + let t = tag.clone(); + + let res: IResult<_, _, Error> = match (i).compare_no_case(t) { + CompareResult::Ok => Ok(i.take_split(tag_len)), + _ => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(Error::from_error_kind(i, e))) + } + }; + res + } +} + +/// Parse till certain characters are met. +/// +/// The parser will return the longest slice till one of the characters of the combinator's argument are met. +/// +/// It doesn't consume the matched character. +/// +/// It will return a `Err::Error(("", ErrorKind::IsNot))` if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::is_not; +/// +/// fn not_space(s: &str) -> IResult<&str, &str> { +/// is_not(" \t\r\n")(s) +/// } +/// +/// assert_eq!(not_space("Hello, World!"), Ok((" World!", "Hello,"))); +/// assert_eq!(not_space("Sometimes\t"), Ok(("\t", "Sometimes"))); +/// assert_eq!(not_space("Nospace"), Ok(("", "Nospace"))); +/// assert_eq!(not_space(""), Err(Err::Error(Error::new("", ErrorKind::IsNot)))); +/// ``` +pub fn is_not<T, Input, Error: ParseError<Input>>( + arr: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + T: FindToken<<Input as InputTakeAtPosition>::Item>, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::IsNot; + i.split_at_position1_complete(|c| arr.find_token(c), e) + } +} + +/// Returns the longest slice of the matches the pattern. +/// +/// The parser will return the longest slice consisting of the characters in provided in the +/// combinator's argument. +/// +/// It will return a `Err(Err::Error((_, ErrorKind::IsA)))` if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::is_a; +/// +/// fn hex(s: &str) -> IResult<&str, &str> { +/// is_a("1234567890ABCDEF")(s) +/// } +/// +/// assert_eq!(hex("123 and voila"), Ok((" and voila", "123"))); +/// assert_eq!(hex("DEADBEEF and others"), Ok((" and others", "DEADBEEF"))); +/// assert_eq!(hex("BADBABEsomething"), Ok(("something", "BADBABE"))); +/// assert_eq!(hex("D15EA5E"), Ok(("", "D15EA5E"))); +/// assert_eq!(hex(""), Err(Err::Error(Error::new("", ErrorKind::IsA)))); +/// ``` +pub fn is_a<T, Input, Error: ParseError<Input>>( + arr: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + T: FindToken<<Input as InputTakeAtPosition>::Item>, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::IsA; + i.split_at_position1_complete(|c| !arr.find_token(c), e) + } +} + +/// Returns the longest input slice (if any) that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::complete::take_while; +/// use nom::character::is_alphabetic; +/// +/// fn alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while(is_alphabetic)(s) +/// } +/// +/// assert_eq!(alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(alpha(b"12345"), Ok((&b"12345"[..], &b""[..]))); +/// assert_eq!(alpha(b"latin"), Ok((&b""[..], &b"latin"[..]))); +/// assert_eq!(alpha(b""), Ok((&b""[..], &b""[..]))); +/// ``` +pub fn take_while<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| i.split_at_position_complete(|c| !cond(c)) +} + +/// Returns the longest (at least 1) input slice that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// It will return an `Err(Err::Error((_, ErrorKind::TakeWhile1)))` if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take_while1; +/// use nom::character::is_alphabetic; +/// +/// fn alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while1(is_alphabetic)(s) +/// } +/// +/// assert_eq!(alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(alpha(b"latin"), Ok((&b""[..], &b"latin"[..]))); +/// assert_eq!(alpha(b"12345"), Err(Err::Error(Error::new(&b"12345"[..], ErrorKind::TakeWhile1)))); +/// ``` +pub fn take_while1<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::TakeWhile1; + i.split_at_position1_complete(|c| !cond(c), e) + } +} + +/// Returns the longest (m <= len <= n) input slice that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// It will return an `Err::Error((_, ErrorKind::TakeWhileMN))` if the pattern wasn't met or is out +/// of range (m <= len <= n). +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take_while_m_n; +/// use nom::character::is_alphabetic; +/// +/// fn short_alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while_m_n(3, 6, is_alphabetic)(s) +/// } +/// +/// assert_eq!(short_alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(short_alpha(b"lengthy"), Ok((&b"y"[..], &b"length"[..]))); +/// assert_eq!(short_alpha(b"latin"), Ok((&b""[..], &b"latin"[..]))); +/// assert_eq!(short_alpha(b"ed"), Err(Err::Error(Error::new(&b"ed"[..], ErrorKind::TakeWhileMN)))); +/// assert_eq!(short_alpha(b"12345"), Err(Err::Error(Error::new(&b"12345"[..], ErrorKind::TakeWhileMN)))); +/// ``` +pub fn take_while_m_n<F, Input, Error: ParseError<Input>>( + m: usize, + n: usize, + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputIter + InputLength + Slice<RangeFrom<usize>>, + F: Fn(<Input as InputIter>::Item) -> bool, +{ + move |i: Input| { + let input = i; + + match input.position(|c| !cond(c)) { + Some(idx) => { + if idx >= m { + if idx <= n { + let res: IResult<_, _, Error> = if let Ok(index) = input.slice_index(idx) { + Ok(input.take_split(index)) + } else { + Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))) + }; + res + } else { + let res: IResult<_, _, Error> = if let Ok(index) = input.slice_index(n) { + Ok(input.take_split(index)) + } else { + Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))) + }; + res + } + } else { + let e = ErrorKind::TakeWhileMN; + Err(Err::Error(Error::from_error_kind(input, e))) + } + } + None => { + let len = input.input_len(); + if len >= n { + match input.slice_index(n) { + Ok(index) => Ok(input.take_split(index)), + Err(_needed) => Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))), + } + } else if len >= m && len <= n { + let res: IResult<_, _, Error> = Ok((input.slice(len..), input)); + res + } else { + let e = ErrorKind::TakeWhileMN; + Err(Err::Error(Error::from_error_kind(input, e))) + } + } + } + } +} + +/// Returns the longest input slice (if any) till a predicate is met. +/// +/// The parser will return the longest slice till the given predicate *(a function that +/// takes the input and returns a bool)*. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::complete::take_till; +/// +/// fn till_colon(s: &str) -> IResult<&str, &str> { +/// take_till(|c| c == ':')(s) +/// } +/// +/// assert_eq!(till_colon("latin:123"), Ok((":123", "latin"))); +/// assert_eq!(till_colon(":empty matched"), Ok((":empty matched", ""))); //allowed +/// assert_eq!(till_colon("12345"), Ok(("", "12345"))); +/// assert_eq!(till_colon(""), Ok(("", ""))); +/// ``` +pub fn take_till<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| i.split_at_position_complete(|c| cond(c)) +} + +/// Returns the longest (at least 1) input slice till a predicate is met. +/// +/// The parser will return the longest slice till the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// It will return `Err(Err::Error((_, ErrorKind::TakeTill1)))` if the input is empty or the +/// predicate matches the first input. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take_till1; +/// +/// fn till_colon(s: &str) -> IResult<&str, &str> { +/// take_till1(|c| c == ':')(s) +/// } +/// +/// assert_eq!(till_colon("latin:123"), Ok((":123", "latin"))); +/// assert_eq!(till_colon(":empty matched"), Err(Err::Error(Error::new(":empty matched", ErrorKind::TakeTill1)))); +/// assert_eq!(till_colon("12345"), Ok(("", "12345"))); +/// assert_eq!(till_colon(""), Err(Err::Error(Error::new("", ErrorKind::TakeTill1)))); +/// ``` +pub fn take_till1<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::TakeTill1; + i.split_at_position1_complete(|c| cond(c), e) + } +} + +/// Returns an input slice containing the first N input elements (Input[..N]). +/// +/// It will return `Err(Err::Error((_, ErrorKind::Eof)))` if the input is shorter than the argument. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take; +/// +/// fn take6(s: &str) -> IResult<&str, &str> { +/// take(6usize)(s) +/// } +/// +/// assert_eq!(take6("1234567"), Ok(("7", "123456"))); +/// assert_eq!(take6("things"), Ok(("", "things"))); +/// assert_eq!(take6("short"), Err(Err::Error(Error::new("short", ErrorKind::Eof)))); +/// assert_eq!(take6(""), Err(Err::Error(Error::new("", ErrorKind::Eof)))); +/// ``` +/// +/// The units that are taken will depend on the input type. For example, for a +/// `&str` it will take a number of `char`'s, whereas for a `&[u8]` it will +/// take that many `u8`'s: +/// +/// ```rust +/// use nom::error::Error; +/// use nom::bytes::complete::take; +/// +/// assert_eq!(take::<_, _, Error<_>>(1usize)("💙"), Ok(("", "💙"))); +/// assert_eq!(take::<_, _, Error<_>>(1usize)("💙".as_bytes()), Ok((b"\x9F\x92\x99".as_ref(), b"\xF0".as_ref()))); +/// ``` +pub fn take<C, Input, Error: ParseError<Input>>( + count: C, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputIter + InputTake, + C: ToUsize, +{ + let c = count.to_usize(); + move |i: Input| match i.slice_index(c) { + Err(_needed) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::Eof))), + Ok(index) => Ok(i.take_split(index)), + } +} + +/// Returns the input slice up to the first occurrence of the pattern. +/// +/// It doesn't consume the pattern. It will return `Err(Err::Error((_, ErrorKind::TakeUntil)))` +/// if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take_until; +/// +/// fn until_eof(s: &str) -> IResult<&str, &str> { +/// take_until("eof")(s) +/// } +/// +/// assert_eq!(until_eof("hello, worldeof"), Ok(("eof", "hello, world"))); +/// assert_eq!(until_eof("hello, world"), Err(Err::Error(Error::new("hello, world", ErrorKind::TakeUntil)))); +/// assert_eq!(until_eof(""), Err(Err::Error(Error::new("", ErrorKind::TakeUntil)))); +/// assert_eq!(until_eof("1eof2eof"), Ok(("eof2eof", "1"))); +/// ``` +pub fn take_until<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + FindSubstring<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let t = tag.clone(); + let res: IResult<_, _, Error> = match i.find_substring(t) { + None => Err(Err::Error(Error::from_error_kind(i, ErrorKind::TakeUntil))), + Some(index) => Ok(i.take_split(index)), + }; + res + } +} + +/// Returns the non empty input slice up to the first occurrence of the pattern. +/// +/// It doesn't consume the pattern. It will return `Err(Err::Error((_, ErrorKind::TakeUntil)))` +/// if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::complete::take_until1; +/// +/// fn until_eof(s: &str) -> IResult<&str, &str> { +/// take_until1("eof")(s) +/// } +/// +/// assert_eq!(until_eof("hello, worldeof"), Ok(("eof", "hello, world"))); +/// assert_eq!(until_eof("hello, world"), Err(Err::Error(Error::new("hello, world", ErrorKind::TakeUntil)))); +/// assert_eq!(until_eof(""), Err(Err::Error(Error::new("", ErrorKind::TakeUntil)))); +/// assert_eq!(until_eof("1eof2eof"), Ok(("eof2eof", "1"))); +/// assert_eq!(until_eof("eof"), Err(Err::Error(Error::new("eof", ErrorKind::TakeUntil)))); +/// ``` +pub fn take_until1<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + FindSubstring<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let t = tag.clone(); + let res: IResult<_, _, Error> = match i.find_substring(t) { + None => Err(Err::Error(Error::from_error_kind(i, ErrorKind::TakeUntil))), + Some(0) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::TakeUntil))), + Some(index) => Ok(i.take_split(index)), + }; + res + } +} + +/// Matches a byte string with escaped characters. +/// +/// * The first argument matches the normal characters (it must not accept the control character) +/// * The second argument is the control character (like `\` in most languages) +/// * The third argument matches the escaped characters +/// # Example +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// # use nom::character::complete::digit1; +/// use nom::bytes::complete::escaped; +/// use nom::character::complete::one_of; +/// +/// fn esc(s: &str) -> IResult<&str, &str> { +/// escaped(digit1, '\\', one_of(r#""n\"#))(s) +/// } +/// +/// assert_eq!(esc("123;"), Ok((";", "123"))); +/// assert_eq!(esc(r#"12\"34;"#), Ok((";", r#"12\"34"#))); +/// ``` +/// +pub fn escaped<'a, Input: 'a, Error, F, G, O1, O2>( + mut normal: F, + control_char: char, + mut escapable: G, +) -> impl FnMut(Input) -> IResult<Input, Input, Error> +where + Input: Clone + + crate::traits::Offset + + InputLength + + InputTake + + InputTakeAtPosition + + Slice<RangeFrom<usize>> + + InputIter, + <Input as InputIter>::Item: crate::traits::AsChar, + F: Parser<Input, O1, Error>, + G: Parser<Input, O2, Error>, + Error: ParseError<Input>, +{ + use crate::traits::AsChar; + + move |input: Input| { + let mut i = input.clone(); + + while i.input_len() > 0 { + let current_len = i.input_len(); + + match normal.parse(i.clone()) { + Ok((i2, _)) => { + // return if we consumed everything or if the normal parser + // does not consume anything + if i2.input_len() == 0 { + return Ok((input.slice(input.input_len()..), input)); + } else if i2.input_len() == current_len { + let index = input.offset(&i2); + return Ok(input.take_split(index)); + } else { + i = i2; + } + } + Err(Err::Error(_)) => { + // unwrap() should be safe here since index < $i.input_len() + if i.iter_elements().next().unwrap().as_char() == control_char { + let next = control_char.len_utf8(); + if next >= i.input_len() { + return Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::Escaped, + ))); + } else { + match escapable.parse(i.slice(next..)) { + Ok((i2, _)) => { + if i2.input_len() == 0 { + return Ok((input.slice(input.input_len()..), input)); + } else { + i = i2; + } + } + Err(e) => return Err(e), + } + } + } else { + let index = input.offset(&i); + if index == 0 { + return Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::Escaped, + ))); + } + return Ok(input.take_split(index)); + } + } + Err(e) => { + return Err(e); + } + } + } + + Ok((input.slice(input.input_len()..), input)) + } +} + +/// Matches a byte string with escaped characters. +/// +/// * The first argument matches the normal characters (it must not match the control character) +/// * The second argument is the control character (like `\` in most languages) +/// * The third argument matches the escaped characters and transforms them +/// +/// As an example, the chain `abc\tdef` could be `abc def` (it also consumes the control character) +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// # use std::str::from_utf8; +/// use nom::bytes::complete::{escaped_transform, tag}; +/// use nom::character::complete::alpha1; +/// use nom::branch::alt; +/// use nom::combinator::value; +/// +/// fn parser(input: &str) -> IResult<&str, String> { +/// escaped_transform( +/// alpha1, +/// '\\', +/// alt(( +/// value("\\", tag("\\")), +/// value("\"", tag("\"")), +/// value("\n", tag("n")), +/// )) +/// )(input) +/// } +/// +/// assert_eq!(parser("ab\\\"cd"), Ok(("", String::from("ab\"cd")))); +/// assert_eq!(parser("ab\\ncd"), Ok(("", String::from("ab\ncd")))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn escaped_transform<Input, Error, F, G, O1, O2, ExtendItem, Output>( + mut normal: F, + control_char: char, + mut transform: G, +) -> impl FnMut(Input) -> IResult<Input, Output, Error> +where + Input: Clone + + crate::traits::Offset + + InputLength + + InputTake + + InputTakeAtPosition + + Slice<RangeFrom<usize>> + + InputIter, + Input: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + O1: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + O2: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + <Input as InputIter>::Item: crate::traits::AsChar, + F: Parser<Input, O1, Error>, + G: Parser<Input, O2, Error>, + Error: ParseError<Input>, +{ + use crate::traits::AsChar; + + move |input: Input| { + let mut index = 0; + let mut res = input.new_builder(); + + let i = input.clone(); + + while index < i.input_len() { + let current_len = i.input_len(); + let remainder = i.slice(index..); + match normal.parse(remainder.clone()) { + Ok((i2, o)) => { + o.extend_into(&mut res); + if i2.input_len() == 0 { + return Ok((i.slice(i.input_len()..), res)); + } else if i2.input_len() == current_len { + return Ok((remainder, res)); + } else { + index = input.offset(&i2); + } + } + Err(Err::Error(_)) => { + // unwrap() should be safe here since index < $i.input_len() + if remainder.iter_elements().next().unwrap().as_char() == control_char { + let next = index + control_char.len_utf8(); + let input_len = input.input_len(); + + if next >= input_len { + return Err(Err::Error(Error::from_error_kind( + remainder, + ErrorKind::EscapedTransform, + ))); + } else { + match transform.parse(i.slice(next..)) { + Ok((i2, o)) => { + o.extend_into(&mut res); + if i2.input_len() == 0 { + return Ok((i.slice(i.input_len()..), res)); + } else { + index = input.offset(&i2); + } + } + Err(e) => return Err(e), + } + } + } else { + if index == 0 { + return Err(Err::Error(Error::from_error_kind( + remainder, + ErrorKind::EscapedTransform, + ))); + } + return Ok((remainder, res)); + } + } + Err(e) => return Err(e), + } + } + Ok((input.slice(index..), res)) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn complete_take_while_m_n_utf8_all_matching() { + let result: IResult<&str, &str> = + super::take_while_m_n(1, 4, |c: char| c.is_alphabetic())("øn"); + assert_eq!(result, Ok(("", "øn"))); + } + + #[test] + fn complete_take_while_m_n_utf8_all_matching_substring() { + let result: IResult<&str, &str> = + super::take_while_m_n(1, 1, |c: char| c.is_alphabetic())("øn"); + assert_eq!(result, Ok(("n", "ø"))); + } + + // issue #1336 "escaped hangs if normal parser accepts empty" + fn escaped_string(input: &str) -> IResult<&str, &str> { + use crate::character::complete::{alpha0, one_of}; + escaped(alpha0, '\\', one_of("n"))(input) + } + + // issue #1336 "escaped hangs if normal parser accepts empty" + #[test] + fn escaped_hang() { + escaped_string("7").unwrap(); + escaped_string("a7").unwrap(); + } + + // issue ##1118 escaped does not work with empty string + fn unquote<'a>(input: &'a str) -> IResult<&'a str, &'a str> { + use crate::bytes::complete::*; + use crate::character::complete::*; + use crate::combinator::opt; + use crate::sequence::delimited; + + delimited( + char('"'), + escaped(opt(none_of(r#"\""#)), '\\', one_of(r#"\"rnt"#)), + char('"'), + )(input) + } + + #[test] + fn escaped_hang_1118() { + assert_eq!(unquote(r#""""#), Ok(("", ""))); + } +} diff --git a/third_party/rust/nom/src/bytes/mod.rs b/third_party/rust/nom/src/bytes/mod.rs new file mode 100644 index 0000000000..7bc2d15a79 --- /dev/null +++ b/third_party/rust/nom/src/bytes/mod.rs @@ -0,0 +1,6 @@ +//! Parsers recognizing bytes streams + +pub mod complete; +pub mod streaming; +#[cfg(test)] +mod tests; diff --git a/third_party/rust/nom/src/bytes/streaming.rs b/third_party/rust/nom/src/bytes/streaming.rs new file mode 100644 index 0000000000..e972760e21 --- /dev/null +++ b/third_party/rust/nom/src/bytes/streaming.rs @@ -0,0 +1,700 @@ +//! Parsers recognizing bytes streams, streaming version + +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Needed, Parser}; +use crate::lib::std::ops::RangeFrom; +use crate::lib::std::result::Result::*; +use crate::traits::{ + Compare, CompareResult, FindSubstring, FindToken, InputIter, InputLength, InputTake, + InputTakeAtPosition, Slice, ToUsize, +}; + +/// Recognizes a pattern. +/// +/// The input data will be compared to the tag combinator's argument and will return the part of +/// the input that matches the argument. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::tag; +/// +/// fn parser(s: &str) -> IResult<&str, &str> { +/// tag("Hello")(s) +/// } +/// +/// assert_eq!(parser("Hello, World!"), Ok((", World!", "Hello"))); +/// assert_eq!(parser("Something"), Err(Err::Error(Error::new("Something", ErrorKind::Tag)))); +/// assert_eq!(parser("S"), Err(Err::Error(Error::new("S", ErrorKind::Tag)))); +/// assert_eq!(parser("H"), Err(Err::Incomplete(Needed::new(4)))); +/// ``` +pub fn tag<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputLength + Compare<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let tag_len = tag.input_len(); + let t = tag.clone(); + + let res: IResult<_, _, Error> = match i.compare(t) { + CompareResult::Ok => Ok(i.take_split(tag_len)), + CompareResult::Incomplete => Err(Err::Incomplete(Needed::new(tag_len - i.input_len()))), + CompareResult::Error => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(Error::from_error_kind(i, e))) + } + }; + res + } +} + +/// Recognizes a case insensitive pattern. +/// +/// The input data will be compared to the tag combinator's argument and will return the part of +/// the input that matches the argument with no regard to case. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::tag_no_case; +/// +/// fn parser(s: &str) -> IResult<&str, &str> { +/// tag_no_case("hello")(s) +/// } +/// +/// assert_eq!(parser("Hello, World!"), Ok((", World!", "Hello"))); +/// assert_eq!(parser("hello, World!"), Ok((", World!", "hello"))); +/// assert_eq!(parser("HeLlO, World!"), Ok((", World!", "HeLlO"))); +/// assert_eq!(parser("Something"), Err(Err::Error(Error::new("Something", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Incomplete(Needed::new(5)))); +/// ``` +pub fn tag_no_case<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputLength + Compare<T>, + T: InputLength + Clone, +{ + move |i: Input| { + let tag_len = tag.input_len(); + let t = tag.clone(); + + let res: IResult<_, _, Error> = match (i).compare_no_case(t) { + CompareResult::Ok => Ok(i.take_split(tag_len)), + CompareResult::Incomplete => Err(Err::Incomplete(Needed::new(tag_len - i.input_len()))), + CompareResult::Error => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(Error::from_error_kind(i, e))) + } + }; + res + } +} + +/// Parse till certain characters are met. +/// +/// The parser will return the longest slice till one of the characters of the combinator's argument are met. +/// +/// It doesn't consume the matched character. +/// +/// It will return a `Err::Incomplete(Needed::new(1))` if the pattern wasn't met. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::is_not; +/// +/// fn not_space(s: &str) -> IResult<&str, &str> { +/// is_not(" \t\r\n")(s) +/// } +/// +/// assert_eq!(not_space("Hello, World!"), Ok((" World!", "Hello,"))); +/// assert_eq!(not_space("Sometimes\t"), Ok(("\t", "Sometimes"))); +/// assert_eq!(not_space("Nospace"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(not_space(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn is_not<T, Input, Error: ParseError<Input>>( + arr: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + T: FindToken<<Input as InputTakeAtPosition>::Item>, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::IsNot; + i.split_at_position1(|c| arr.find_token(c), e) + } +} + +/// Returns the longest slice of the matches the pattern. +/// +/// The parser will return the longest slice consisting of the characters in provided in the +/// combinator's argument. +/// +/// # Streaming specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` if the pattern wasn't met +/// or if the pattern reaches the end of the input. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::is_a; +/// +/// fn hex(s: &str) -> IResult<&str, &str> { +/// is_a("1234567890ABCDEF")(s) +/// } +/// +/// assert_eq!(hex("123 and voila"), Ok((" and voila", "123"))); +/// assert_eq!(hex("DEADBEEF and others"), Ok((" and others", "DEADBEEF"))); +/// assert_eq!(hex("BADBABEsomething"), Ok(("something", "BADBABE"))); +/// assert_eq!(hex("D15EA5E"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(hex(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn is_a<T, Input, Error: ParseError<Input>>( + arr: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + T: FindToken<<Input as InputTakeAtPosition>::Item>, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::IsA; + i.split_at_position1(|c| !arr.find_token(c), e) + } +} + +/// Returns the longest input slice (if any) that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` if the pattern reaches the end of the input. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::take_while; +/// use nom::character::is_alphabetic; +/// +/// fn alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while(is_alphabetic)(s) +/// } +/// +/// assert_eq!(alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(alpha(b"12345"), Ok((&b"12345"[..], &b""[..]))); +/// assert_eq!(alpha(b"latin"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(alpha(b""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn take_while<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| i.split_at_position(|c| !cond(c)) +} + +/// Returns the longest (at least 1) input slice that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// It will return an `Err(Err::Error((_, ErrorKind::TakeWhile1)))` if the pattern wasn't met. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` or if the pattern reaches the end of the input. +/// +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::take_while1; +/// use nom::character::is_alphabetic; +/// +/// fn alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while1(is_alphabetic)(s) +/// } +/// +/// assert_eq!(alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(alpha(b"latin"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(alpha(b"12345"), Err(Err::Error(Error::new(&b"12345"[..], ErrorKind::TakeWhile1)))); +/// ``` +pub fn take_while1<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::TakeWhile1; + i.split_at_position1(|c| !cond(c), e) + } +} + +/// Returns the longest (m <= len <= n) input slice that matches the predicate. +/// +/// The parser will return the longest slice that matches the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// It will return an `Err::Error((_, ErrorKind::TakeWhileMN))` if the pattern wasn't met. +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` if the pattern reaches the end of the input or is too short. +/// +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::take_while_m_n; +/// use nom::character::is_alphabetic; +/// +/// fn short_alpha(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// take_while_m_n(3, 6, is_alphabetic)(s) +/// } +/// +/// assert_eq!(short_alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..]))); +/// assert_eq!(short_alpha(b"lengthy"), Ok((&b"y"[..], &b"length"[..]))); +/// assert_eq!(short_alpha(b"latin"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(short_alpha(b"ed"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(short_alpha(b"12345"), Err(Err::Error(Error::new(&b"12345"[..], ErrorKind::TakeWhileMN)))); +/// ``` +pub fn take_while_m_n<F, Input, Error: ParseError<Input>>( + m: usize, + n: usize, + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputIter + InputLength, + F: Fn(<Input as InputIter>::Item) -> bool, +{ + move |i: Input| { + let input = i; + + match input.position(|c| !cond(c)) { + Some(idx) => { + if idx >= m { + if idx <= n { + let res: IResult<_, _, Error> = if let Ok(index) = input.slice_index(idx) { + Ok(input.take_split(index)) + } else { + Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))) + }; + res + } else { + let res: IResult<_, _, Error> = if let Ok(index) = input.slice_index(n) { + Ok(input.take_split(index)) + } else { + Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))) + }; + res + } + } else { + let e = ErrorKind::TakeWhileMN; + Err(Err::Error(Error::from_error_kind(input, e))) + } + } + None => { + let len = input.input_len(); + if len >= n { + match input.slice_index(n) { + Ok(index) => Ok(input.take_split(index)), + Err(_needed) => Err(Err::Error(Error::from_error_kind( + input, + ErrorKind::TakeWhileMN, + ))), + } + } else { + let needed = if m > len { m - len } else { 1 }; + Err(Err::Incomplete(Needed::new(needed))) + } + } + } + } +} + +/// Returns the longest input slice (if any) till a predicate is met. +/// +/// The parser will return the longest slice till the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` if the match reaches the +/// end of input or if there was not match. +/// +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::take_till; +/// +/// fn till_colon(s: &str) -> IResult<&str, &str> { +/// take_till(|c| c == ':')(s) +/// } +/// +/// assert_eq!(till_colon("latin:123"), Ok((":123", "latin"))); +/// assert_eq!(till_colon(":empty matched"), Ok((":empty matched", ""))); //allowed +/// assert_eq!(till_colon("12345"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(till_colon(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn take_till<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| i.split_at_position(|c| cond(c)) +} + +/// Returns the longest (at least 1) input slice till a predicate is met. +/// +/// The parser will return the longest slice till the given predicate *(a function that +/// takes the input and returns a bool)*. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(1))` if the match reaches the +/// end of input or if there was not match. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::take_till1; +/// +/// fn till_colon(s: &str) -> IResult<&str, &str> { +/// take_till1(|c| c == ':')(s) +/// } +/// +/// assert_eq!(till_colon("latin:123"), Ok((":123", "latin"))); +/// assert_eq!(till_colon(":empty matched"), Err(Err::Error(Error::new(":empty matched", ErrorKind::TakeTill1)))); +/// assert_eq!(till_colon("12345"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(till_colon(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn take_till1<F, Input, Error: ParseError<Input>>( + cond: F, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTakeAtPosition, + F: Fn(<Input as InputTakeAtPosition>::Item) -> bool, +{ + move |i: Input| { + let e: ErrorKind = ErrorKind::TakeTill1; + i.split_at_position1(|c| cond(c), e) + } +} + +/// Returns an input slice containing the first N input elements (Input[..N]). +/// +/// # Streaming Specific +/// *Streaming version* if the input has less than N elements, `take` will +/// return a `Err::Incomplete(Needed::new(M))` where M is the number of +/// additional bytes the parser would need to succeed. +/// It is well defined for `&[u8]` as the number of elements is the byte size, +/// but for types like `&str`, we cannot know how many bytes correspond for +/// the next few chars, so the result will be `Err::Incomplete(Needed::Unknown)` +/// +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::take; +/// +/// fn take6(s: &str) -> IResult<&str, &str> { +/// take(6usize)(s) +/// } +/// +/// assert_eq!(take6("1234567"), Ok(("7", "123456"))); +/// assert_eq!(take6("things"), Ok(("", "things"))); +/// assert_eq!(take6("short"), Err(Err::Incomplete(Needed::Unknown))); +/// ``` +pub fn take<C, Input, Error: ParseError<Input>>( + count: C, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputIter + InputTake + InputLength, + C: ToUsize, +{ + let c = count.to_usize(); + move |i: Input| match i.slice_index(c) { + Err(i) => Err(Err::Incomplete(i)), + Ok(index) => Ok(i.take_split(index)), + } +} + +/// Returns the input slice up to the first occurrence of the pattern. +/// +/// It doesn't consume the pattern. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(N))` if the input doesn't +/// contain the pattern or if the input is smaller than the pattern. +/// # Example +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::bytes::streaming::take_until; +/// +/// fn until_eof(s: &str) -> IResult<&str, &str> { +/// take_until("eof")(s) +/// } +/// +/// assert_eq!(until_eof("hello, worldeof"), Ok(("eof", "hello, world"))); +/// assert_eq!(until_eof("hello, world"), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(until_eof("hello, worldeo"), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(until_eof("1eof2eof"), Ok(("eof2eof", "1"))); +/// ``` +pub fn take_until<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputLength + FindSubstring<T>, + T: Clone, +{ + move |i: Input| { + let t = tag.clone(); + + let res: IResult<_, _, Error> = match i.find_substring(t) { + None => Err(Err::Incomplete(Needed::Unknown)), + Some(index) => Ok(i.take_split(index)), + }; + res + } +} + +/// Returns the non empty input slice up to the first occurrence of the pattern. +/// +/// It doesn't consume the pattern. +/// +/// # Streaming Specific +/// *Streaming version* will return a `Err::Incomplete(Needed::new(N))` if the input doesn't +/// contain the pattern or if the input is smaller than the pattern. +/// # Example +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::bytes::streaming::take_until1; +/// +/// fn until_eof(s: &str) -> IResult<&str, &str> { +/// take_until1("eof")(s) +/// } +/// +/// assert_eq!(until_eof("hello, worldeof"), Ok(("eof", "hello, world"))); +/// assert_eq!(until_eof("hello, world"), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(until_eof("hello, worldeo"), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(until_eof("1eof2eof"), Ok(("eof2eof", "1"))); +/// assert_eq!(until_eof("eof"), Err(Err::Error(Error::new("eof", ErrorKind::TakeUntil)))); +/// ``` +pub fn take_until1<T, Input, Error: ParseError<Input>>( + tag: T, +) -> impl Fn(Input) -> IResult<Input, Input, Error> +where + Input: InputTake + InputLength + FindSubstring<T>, + T: Clone, +{ + move |i: Input| { + let t = tag.clone(); + + let res: IResult<_, _, Error> = match i.find_substring(t) { + None => Err(Err::Incomplete(Needed::Unknown)), + Some(0) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::TakeUntil))), + Some(index) => Ok(i.take_split(index)), + }; + res + } +} + +/// Matches a byte string with escaped characters. +/// +/// * The first argument matches the normal characters (it must not accept the control character) +/// * The second argument is the control character (like `\` in most languages) +/// * The third argument matches the escaped characters +/// # Example +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// # use nom::character::complete::digit1; +/// use nom::bytes::streaming::escaped; +/// use nom::character::streaming::one_of; +/// +/// fn esc(s: &str) -> IResult<&str, &str> { +/// escaped(digit1, '\\', one_of("\"n\\"))(s) +/// } +/// +/// assert_eq!(esc("123;"), Ok((";", "123"))); +/// assert_eq!(esc("12\\\"34;"), Ok((";", "12\\\"34"))); +/// ``` +/// +pub fn escaped<Input, Error, F, G, O1, O2>( + mut normal: F, + control_char: char, + mut escapable: G, +) -> impl FnMut(Input) -> IResult<Input, Input, Error> +where + Input: Clone + + crate::traits::Offset + + InputLength + + InputTake + + InputTakeAtPosition + + Slice<RangeFrom<usize>> + + InputIter, + <Input as InputIter>::Item: crate::traits::AsChar, + F: Parser<Input, O1, Error>, + G: Parser<Input, O2, Error>, + Error: ParseError<Input>, +{ + use crate::traits::AsChar; + + move |input: Input| { + let mut i = input.clone(); + + while i.input_len() > 0 { + let current_len = i.input_len(); + + match normal.parse(i.clone()) { + Ok((i2, _)) => { + if i2.input_len() == 0 { + return Err(Err::Incomplete(Needed::Unknown)); + } else if i2.input_len() == current_len { + let index = input.offset(&i2); + return Ok(input.take_split(index)); + } else { + i = i2; + } + } + Err(Err::Error(_)) => { + // unwrap() should be safe here since index < $i.input_len() + if i.iter_elements().next().unwrap().as_char() == control_char { + let next = control_char.len_utf8(); + if next >= i.input_len() { + return Err(Err::Incomplete(Needed::new(1))); + } else { + match escapable.parse(i.slice(next..)) { + Ok((i2, _)) => { + if i2.input_len() == 0 { + return Err(Err::Incomplete(Needed::Unknown)); + } else { + i = i2; + } + } + Err(e) => return Err(e), + } + } + } else { + let index = input.offset(&i); + return Ok(input.take_split(index)); + } + } + Err(e) => { + return Err(e); + } + } + } + + Err(Err::Incomplete(Needed::Unknown)) + } +} + +/// Matches a byte string with escaped characters. +/// +/// * The first argument matches the normal characters (it must not match the control character) +/// * The second argument is the control character (like `\` in most languages) +/// * The third argument matches the escaped characters and transforms them +/// +/// As an example, the chain `abc\tdef` could be `abc def` (it also consumes the control character) +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// # use std::str::from_utf8; +/// use nom::bytes::streaming::{escaped_transform, tag}; +/// use nom::character::streaming::alpha1; +/// use nom::branch::alt; +/// use nom::combinator::value; +/// +/// fn parser(input: &str) -> IResult<&str, String> { +/// escaped_transform( +/// alpha1, +/// '\\', +/// alt(( +/// value("\\", tag("\\")), +/// value("\"", tag("\"")), +/// value("\n", tag("n")), +/// )) +/// )(input) +/// } +/// +/// assert_eq!(parser("ab\\\"cd\""), Ok(("\"", String::from("ab\"cd")))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn escaped_transform<Input, Error, F, G, O1, O2, ExtendItem, Output>( + mut normal: F, + control_char: char, + mut transform: G, +) -> impl FnMut(Input) -> IResult<Input, Output, Error> +where + Input: Clone + + crate::traits::Offset + + InputLength + + InputTake + + InputTakeAtPosition + + Slice<RangeFrom<usize>> + + InputIter, + Input: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + O1: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + O2: crate::traits::ExtendInto<Item = ExtendItem, Extender = Output>, + <Input as InputIter>::Item: crate::traits::AsChar, + F: Parser<Input, O1, Error>, + G: Parser<Input, O2, Error>, + Error: ParseError<Input>, +{ + use crate::traits::AsChar; + + move |input: Input| { + let mut index = 0; + let mut res = input.new_builder(); + + let i = input.clone(); + + while index < i.input_len() { + let current_len = i.input_len(); + let remainder = i.slice(index..); + match normal.parse(remainder.clone()) { + Ok((i2, o)) => { + o.extend_into(&mut res); + if i2.input_len() == 0 { + return Err(Err::Incomplete(Needed::Unknown)); + } else if i2.input_len() == current_len { + return Ok((remainder, res)); + } else { + index = input.offset(&i2); + } + } + Err(Err::Error(_)) => { + // unwrap() should be safe here since index < $i.input_len() + if remainder.iter_elements().next().unwrap().as_char() == control_char { + let next = index + control_char.len_utf8(); + let input_len = input.input_len(); + + if next >= input_len { + return Err(Err::Incomplete(Needed::Unknown)); + } else { + match transform.parse(i.slice(next..)) { + Ok((i2, o)) => { + o.extend_into(&mut res); + if i2.input_len() == 0 { + return Err(Err::Incomplete(Needed::Unknown)); + } else { + index = input.offset(&i2); + } + } + Err(e) => return Err(e), + } + } + } else { + return Ok((remainder, res)); + } + } + Err(e) => return Err(e), + } + } + Err(Err::Incomplete(Needed::Unknown)) + } +} diff --git a/third_party/rust/nom/src/bytes/tests.rs b/third_party/rust/nom/src/bytes/tests.rs new file mode 100644 index 0000000000..159c4b4ffc --- /dev/null +++ b/third_party/rust/nom/src/bytes/tests.rs @@ -0,0 +1,636 @@ +use crate::character::is_alphabetic; +use crate::character::streaming::{ + alpha1 as alpha, alphanumeric1 as alphanumeric, digit1 as digit, hex_digit1 as hex_digit, + multispace1 as multispace, oct_digit1 as oct_digit, space1 as space, +}; +use crate::error::ErrorKind; +use crate::internal::{Err, IResult, Needed}; +#[cfg(feature = "alloc")] +use crate::{ + branch::alt, + bytes::complete::{escaped, escaped_transform, tag}, + combinator::{map, value}, + lib::std::string::String, + lib::std::vec::Vec, +}; + +#[test] +fn is_a() { + use crate::bytes::streaming::is_a; + + fn a_or_b(i: &[u8]) -> IResult<&[u8], &[u8]> { + is_a("ab")(i) + } + + let a = &b"abcd"[..]; + assert_eq!(a_or_b(a), Ok((&b"cd"[..], &b"ab"[..]))); + + let b = &b"bcde"[..]; + assert_eq!(a_or_b(b), Ok((&b"cde"[..], &b"b"[..]))); + + let c = &b"cdef"[..]; + assert_eq!( + a_or_b(c), + Err(Err::Error(error_position!(c, ErrorKind::IsA))) + ); + + let d = &b"bacdef"[..]; + assert_eq!(a_or_b(d), Ok((&b"cdef"[..], &b"ba"[..]))); +} + +#[test] +fn is_not() { + use crate::bytes::streaming::is_not; + + fn a_or_b(i: &[u8]) -> IResult<&[u8], &[u8]> { + is_not("ab")(i) + } + + let a = &b"cdab"[..]; + assert_eq!(a_or_b(a), Ok((&b"ab"[..], &b"cd"[..]))); + + let b = &b"cbde"[..]; + assert_eq!(a_or_b(b), Ok((&b"bde"[..], &b"c"[..]))); + + let c = &b"abab"[..]; + assert_eq!( + a_or_b(c), + Err(Err::Error(error_position!(c, ErrorKind::IsNot))) + ); + + let d = &b"cdefba"[..]; + assert_eq!(a_or_b(d), Ok((&b"ba"[..], &b"cdef"[..]))); + + let e = &b"e"[..]; + assert_eq!(a_or_b(e), Err(Err::Incomplete(Needed::new(1)))); +} + +#[cfg(feature = "alloc")] +#[allow(unused_variables)] +#[test] +fn escaping() { + use crate::character::streaming::one_of; + + fn esc(i: &[u8]) -> IResult<&[u8], &[u8]> { + escaped(alpha, '\\', one_of("\"n\\"))(i) + } + assert_eq!(esc(&b"abcd;"[..]), Ok((&b";"[..], &b"abcd"[..]))); + assert_eq!(esc(&b"ab\\\"cd;"[..]), Ok((&b";"[..], &b"ab\\\"cd"[..]))); + assert_eq!(esc(&b"\\\"abcd;"[..]), Ok((&b";"[..], &b"\\\"abcd"[..]))); + assert_eq!(esc(&b"\\n;"[..]), Ok((&b";"[..], &b"\\n"[..]))); + assert_eq!(esc(&b"ab\\\"12"[..]), Ok((&b"12"[..], &b"ab\\\""[..]))); + assert_eq!( + esc(&b"AB\\"[..]), + Err(Err::Error(error_position!( + &b"AB\\"[..], + ErrorKind::Escaped + ))) + ); + assert_eq!( + esc(&b"AB\\A"[..]), + Err(Err::Error(error_node_position!( + &b"AB\\A"[..], + ErrorKind::Escaped, + error_position!(&b"A"[..], ErrorKind::OneOf) + ))) + ); + + fn esc2(i: &[u8]) -> IResult<&[u8], &[u8]> { + escaped(digit, '\\', one_of("\"n\\"))(i) + } + assert_eq!(esc2(&b"12\\nnn34"[..]), Ok((&b"nn34"[..], &b"12\\n"[..]))); +} + +#[cfg(feature = "alloc")] +#[test] +fn escaping_str() { + use crate::character::streaming::one_of; + + fn esc(i: &str) -> IResult<&str, &str> { + escaped(alpha, '\\', one_of("\"n\\"))(i) + } + assert_eq!(esc("abcd;"), Ok((";", "abcd"))); + assert_eq!(esc("ab\\\"cd;"), Ok((";", "ab\\\"cd"))); + assert_eq!(esc("\\\"abcd;"), Ok((";", "\\\"abcd"))); + assert_eq!(esc("\\n;"), Ok((";", "\\n"))); + assert_eq!(esc("ab\\\"12"), Ok(("12", "ab\\\""))); + assert_eq!( + esc("AB\\"), + Err(Err::Error(error_position!("AB\\", ErrorKind::Escaped))) + ); + assert_eq!( + esc("AB\\A"), + Err(Err::Error(error_node_position!( + "AB\\A", + ErrorKind::Escaped, + error_position!("A", ErrorKind::OneOf) + ))) + ); + + fn esc2(i: &str) -> IResult<&str, &str> { + escaped(digit, '\\', one_of("\"n\\"))(i) + } + assert_eq!(esc2("12\\nnn34"), Ok(("nn34", "12\\n"))); + + fn esc3(i: &str) -> IResult<&str, &str> { + escaped(alpha, '\u{241b}', one_of("\"n"))(i) + } + assert_eq!(esc3("ab␛ncd;"), Ok((";", "ab␛ncd"))); +} + +#[cfg(feature = "alloc")] +fn to_s(i: Vec<u8>) -> String { + String::from_utf8_lossy(&i).into_owned() +} + +#[cfg(feature = "alloc")] +#[test] +fn escape_transform() { + fn esc(i: &[u8]) -> IResult<&[u8], String> { + map( + escaped_transform( + alpha, + '\\', + alt(( + value(&b"\\"[..], tag("\\")), + value(&b"\""[..], tag("\"")), + value(&b"\n"[..], tag("n")), + )), + ), + to_s, + )(i) + } + + assert_eq!(esc(&b"abcd;"[..]), Ok((&b";"[..], String::from("abcd")))); + assert_eq!( + esc(&b"ab\\\"cd;"[..]), + Ok((&b";"[..], String::from("ab\"cd"))) + ); + assert_eq!( + esc(&b"\\\"abcd;"[..]), + Ok((&b";"[..], String::from("\"abcd"))) + ); + assert_eq!(esc(&b"\\n;"[..]), Ok((&b";"[..], String::from("\n")))); + assert_eq!( + esc(&b"ab\\\"12"[..]), + Ok((&b"12"[..], String::from("ab\""))) + ); + assert_eq!( + esc(&b"AB\\"[..]), + Err(Err::Error(error_position!( + &b"\\"[..], + ErrorKind::EscapedTransform + ))) + ); + assert_eq!( + esc(&b"AB\\A"[..]), + Err(Err::Error(error_node_position!( + &b"AB\\A"[..], + ErrorKind::EscapedTransform, + error_position!(&b"A"[..], ErrorKind::Tag) + ))) + ); + + fn esc2(i: &[u8]) -> IResult<&[u8], String> { + map( + escaped_transform( + alpha, + '&', + alt(( + value("è".as_bytes(), tag("egrave;")), + value("à".as_bytes(), tag("agrave;")), + )), + ), + to_s, + )(i) + } + assert_eq!( + esc2(&b"abèDEF;"[..]), + Ok((&b";"[..], String::from("abèDEF"))) + ); + assert_eq!( + esc2(&b"abèDàEF;"[..]), + Ok((&b";"[..], String::from("abèDàEF"))) + ); +} + +#[cfg(feature = "std")] +#[test] +fn escape_transform_str() { + fn esc(i: &str) -> IResult<&str, String> { + escaped_transform( + alpha, + '\\', + alt(( + value("\\", tag("\\")), + value("\"", tag("\"")), + value("\n", tag("n")), + )), + )(i) + } + + assert_eq!(esc("abcd;"), Ok((";", String::from("abcd")))); + assert_eq!(esc("ab\\\"cd;"), Ok((";", String::from("ab\"cd")))); + assert_eq!(esc("\\\"abcd;"), Ok((";", String::from("\"abcd")))); + assert_eq!(esc("\\n;"), Ok((";", String::from("\n")))); + assert_eq!(esc("ab\\\"12"), Ok(("12", String::from("ab\"")))); + assert_eq!( + esc("AB\\"), + Err(Err::Error(error_position!( + "\\", + ErrorKind::EscapedTransform + ))) + ); + assert_eq!( + esc("AB\\A"), + Err(Err::Error(error_node_position!( + "AB\\A", + ErrorKind::EscapedTransform, + error_position!("A", ErrorKind::Tag) + ))) + ); + + fn esc2(i: &str) -> IResult<&str, String> { + escaped_transform( + alpha, + '&', + alt((value("è", tag("egrave;")), value("à", tag("agrave;")))), + )(i) + } + assert_eq!(esc2("abèDEF;"), Ok((";", String::from("abèDEF")))); + assert_eq!( + esc2("abèDàEF;"), + Ok((";", String::from("abèDàEF"))) + ); + + fn esc3(i: &str) -> IResult<&str, String> { + escaped_transform( + alpha, + '␛', + alt((value("\0", tag("0")), value("\n", tag("n")))), + )(i) + } + assert_eq!(esc3("a␛0bc␛n"), Ok(("", String::from("a\0bc\n")))); +} + +#[test] +fn take_until_incomplete() { + use crate::bytes::streaming::take_until; + fn y(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_until("end")(i) + } + assert_eq!(y(&b"nd"[..]), Err(Err::Incomplete(Needed::Unknown))); + assert_eq!(y(&b"123"[..]), Err(Err::Incomplete(Needed::Unknown))); + assert_eq!(y(&b"123en"[..]), Err(Err::Incomplete(Needed::Unknown))); +} + +#[test] +fn take_until_incomplete_s() { + use crate::bytes::streaming::take_until; + fn ys(i: &str) -> IResult<&str, &str> { + take_until("end")(i) + } + assert_eq!(ys("123en"), Err(Err::Incomplete(Needed::Unknown))); +} + +#[test] +fn recognize() { + use crate::bytes::streaming::{tag, take}; + use crate::combinator::recognize; + use crate::sequence::delimited; + + fn x(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(delimited(tag("<!--"), take(5_usize), tag("-->")))(i) + } + let r = x(&b"<!-- abc --> aaa"[..]); + assert_eq!(r, Ok((&b" aaa"[..], &b"<!-- abc -->"[..]))); + + let semicolon = &b";"[..]; + + fn ya(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(alpha)(i) + } + let ra = ya(&b"abc;"[..]); + assert_eq!(ra, Ok((semicolon, &b"abc"[..]))); + + fn yd(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(digit)(i) + } + let rd = yd(&b"123;"[..]); + assert_eq!(rd, Ok((semicolon, &b"123"[..]))); + + fn yhd(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(hex_digit)(i) + } + let rhd = yhd(&b"123abcDEF;"[..]); + assert_eq!(rhd, Ok((semicolon, &b"123abcDEF"[..]))); + + fn yod(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(oct_digit)(i) + } + let rod = yod(&b"1234567;"[..]); + assert_eq!(rod, Ok((semicolon, &b"1234567"[..]))); + + fn yan(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(alphanumeric)(i) + } + let ran = yan(&b"123abc;"[..]); + assert_eq!(ran, Ok((semicolon, &b"123abc"[..]))); + + fn ys(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(space)(i) + } + let rs = ys(&b" \t;"[..]); + assert_eq!(rs, Ok((semicolon, &b" \t"[..]))); + + fn yms(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(multispace)(i) + } + let rms = yms(&b" \t\r\n;"[..]); + assert_eq!(rms, Ok((semicolon, &b" \t\r\n"[..]))); +} + +#[test] +fn take_while() { + use crate::bytes::streaming::take_while; + + fn f(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_while(is_alphabetic)(i) + } + let a = b""; + let b = b"abcd"; + let c = b"abcd123"; + let d = b"123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&b[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&c[..]), Ok((&d[..], &b[..]))); + assert_eq!(f(&d[..]), Ok((&d[..], &a[..]))); +} + +#[test] +fn take_while1() { + use crate::bytes::streaming::take_while1; + + fn f(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_while1(is_alphabetic)(i) + } + let a = b""; + let b = b"abcd"; + let c = b"abcd123"; + let d = b"123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&b[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&c[..]), Ok((&b"123"[..], &b[..]))); + assert_eq!( + f(&d[..]), + Err(Err::Error(error_position!(&d[..], ErrorKind::TakeWhile1))) + ); +} + +#[test] +fn take_while_m_n() { + use crate::bytes::streaming::take_while_m_n; + + fn x(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_while_m_n(2, 4, is_alphabetic)(i) + } + let a = b""; + let b = b"a"; + let c = b"abc"; + let d = b"abc123"; + let e = b"abcde"; + let f = b"123"; + + assert_eq!(x(&a[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!(x(&b[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(x(&c[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(x(&d[..]), Ok((&b"123"[..], &c[..]))); + assert_eq!(x(&e[..]), Ok((&b"e"[..], &b"abcd"[..]))); + assert_eq!( + x(&f[..]), + Err(Err::Error(error_position!(&f[..], ErrorKind::TakeWhileMN))) + ); +} + +#[test] +fn take_till() { + use crate::bytes::streaming::take_till; + + fn f(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_till(is_alphabetic)(i) + } + let a = b""; + let b = b"abcd"; + let c = b"123abcd"; + let d = b"123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&b[..]), Ok((&b"abcd"[..], &b""[..]))); + assert_eq!(f(&c[..]), Ok((&b"abcd"[..], &b"123"[..]))); + assert_eq!(f(&d[..]), Err(Err::Incomplete(Needed::new(1)))); +} + +#[test] +fn take_till1() { + use crate::bytes::streaming::take_till1; + + fn f(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_till1(is_alphabetic)(i) + } + let a = b""; + let b = b"abcd"; + let c = b"123abcd"; + let d = b"123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!( + f(&b[..]), + Err(Err::Error(error_position!(&b[..], ErrorKind::TakeTill1))) + ); + assert_eq!(f(&c[..]), Ok((&b"abcd"[..], &b"123"[..]))); + assert_eq!(f(&d[..]), Err(Err::Incomplete(Needed::new(1)))); +} + +#[test] +fn take_while_utf8() { + use crate::bytes::streaming::take_while; + + fn f(i: &str) -> IResult<&str, &str> { + take_while(|c| c != '點')(i) + } + + assert_eq!(f(""), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f("abcd"), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f("abcd點"), Ok(("點", "abcd"))); + assert_eq!(f("abcd點a"), Ok(("點a", "abcd"))); + + fn g(i: &str) -> IResult<&str, &str> { + take_while(|c| c == '點')(i) + } + + assert_eq!(g(""), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(g("點abcd"), Ok(("abcd", "點"))); + assert_eq!(g("點點點a"), Ok(("a", "點點點"))); +} + +#[test] +fn take_till_utf8() { + use crate::bytes::streaming::take_till; + + fn f(i: &str) -> IResult<&str, &str> { + take_till(|c| c == '點')(i) + } + + assert_eq!(f(""), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f("abcd"), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f("abcd點"), Ok(("點", "abcd"))); + assert_eq!(f("abcd點a"), Ok(("點a", "abcd"))); + + fn g(i: &str) -> IResult<&str, &str> { + take_till(|c| c != '點')(i) + } + + assert_eq!(g(""), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(g("點abcd"), Ok(("abcd", "點"))); + assert_eq!(g("點點點a"), Ok(("a", "點點點"))); +} + +#[test] +fn take_utf8() { + use crate::bytes::streaming::{take, take_while}; + + fn f(i: &str) -> IResult<&str, &str> { + take(3_usize)(i) + } + + assert_eq!(f(""), Err(Err::Incomplete(Needed::Unknown))); + assert_eq!(f("ab"), Err(Err::Incomplete(Needed::Unknown))); + assert_eq!(f("點"), Err(Err::Incomplete(Needed::Unknown))); + assert_eq!(f("ab點cd"), Ok(("cd", "ab點"))); + assert_eq!(f("a點bcd"), Ok(("cd", "a點b"))); + assert_eq!(f("a點b"), Ok(("", "a點b"))); + + fn g(i: &str) -> IResult<&str, &str> { + take_while(|c| c == '點')(i) + } + + assert_eq!(g(""), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(g("點abcd"), Ok(("abcd", "點"))); + assert_eq!(g("點點點a"), Ok(("a", "點點點"))); +} + +#[test] +fn take_while_m_n_utf8() { + use crate::bytes::streaming::take_while_m_n; + + fn parser(i: &str) -> IResult<&str, &str> { + take_while_m_n(1, 1, |c| c == 'A' || c == '😃')(i) + } + assert_eq!(parser("A!"), Ok(("!", "A"))); + assert_eq!(parser("😃!"), Ok(("!", "😃"))); +} + +#[test] +fn take_while_m_n_utf8_full_match() { + use crate::bytes::streaming::take_while_m_n; + + fn parser(i: &str) -> IResult<&str, &str> { + take_while_m_n(1, 1, |c: char| c.is_alphabetic())(i) + } + assert_eq!(parser("øn"), Ok(("n", "ø"))); +} + +#[test] +#[cfg(feature = "std")] +fn recognize_take_while() { + use crate::bytes::streaming::take_while; + use crate::character::is_alphanumeric; + use crate::combinator::recognize; + + fn x(i: &[u8]) -> IResult<&[u8], &[u8]> { + take_while(is_alphanumeric)(i) + } + fn y(i: &[u8]) -> IResult<&[u8], &[u8]> { + recognize(x)(i) + } + assert_eq!(x(&b"ab."[..]), Ok((&b"."[..], &b"ab"[..]))); + println!("X: {:?}", x(&b"ab"[..])); + assert_eq!(y(&b"ab."[..]), Ok((&b"."[..], &b"ab"[..]))); +} + +#[test] +fn length_bytes() { + use crate::{bytes::streaming::tag, multi::length_data, number::streaming::le_u8}; + + fn x(i: &[u8]) -> IResult<&[u8], &[u8]> { + length_data(le_u8)(i) + } + assert_eq!(x(b"\x02..>>"), Ok((&b">>"[..], &b".."[..]))); + assert_eq!(x(b"\x02.."), Ok((&[][..], &b".."[..]))); + assert_eq!(x(b"\x02."), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(x(b"\x02"), Err(Err::Incomplete(Needed::new(2)))); + + fn y(i: &[u8]) -> IResult<&[u8], &[u8]> { + let (i, _) = tag("magic")(i)?; + length_data(le_u8)(i) + } + assert_eq!(y(b"magic\x02..>>"), Ok((&b">>"[..], &b".."[..]))); + assert_eq!(y(b"magic\x02.."), Ok((&[][..], &b".."[..]))); + assert_eq!(y(b"magic\x02."), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(y(b"magic\x02"), Err(Err::Incomplete(Needed::new(2)))); +} + +#[cfg(feature = "alloc")] +#[test] +fn case_insensitive() { + use crate::bytes::streaming::tag_no_case; + + fn test(i: &[u8]) -> IResult<&[u8], &[u8]> { + tag_no_case("ABcd")(i) + } + assert_eq!(test(&b"aBCdefgh"[..]), Ok((&b"efgh"[..], &b"aBCd"[..]))); + assert_eq!(test(&b"abcdefgh"[..]), Ok((&b"efgh"[..], &b"abcd"[..]))); + assert_eq!(test(&b"ABCDefgh"[..]), Ok((&b"efgh"[..], &b"ABCD"[..]))); + assert_eq!(test(&b"ab"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!( + test(&b"Hello"[..]), + Err(Err::Error(error_position!(&b"Hello"[..], ErrorKind::Tag))) + ); + assert_eq!( + test(&b"Hel"[..]), + Err(Err::Error(error_position!(&b"Hel"[..], ErrorKind::Tag))) + ); + + fn test2(i: &str) -> IResult<&str, &str> { + tag_no_case("ABcd")(i) + } + assert_eq!(test2("aBCdefgh"), Ok(("efgh", "aBCd"))); + assert_eq!(test2("abcdefgh"), Ok(("efgh", "abcd"))); + assert_eq!(test2("ABCDefgh"), Ok(("efgh", "ABCD"))); + assert_eq!(test2("ab"), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!( + test2("Hello"), + Err(Err::Error(error_position!(&"Hello"[..], ErrorKind::Tag))) + ); + assert_eq!( + test2("Hel"), + Err(Err::Error(error_position!(&"Hel"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn tag_fixed_size_array() { + use crate::bytes::streaming::tag; + + fn test(i: &[u8]) -> IResult<&[u8], &[u8]> { + tag([0x42])(i) + } + fn test2(i: &[u8]) -> IResult<&[u8], &[u8]> { + tag(&[0x42])(i) + } + let input = [0x42, 0x00]; + assert_eq!(test(&input), Ok((&b"\x00"[..], &b"\x42"[..]))); + assert_eq!(test2(&input), Ok((&b"\x00"[..], &b"\x42"[..]))); +} diff --git a/third_party/rust/nom/src/character/complete.rs b/third_party/rust/nom/src/character/complete.rs new file mode 100644 index 0000000000..7cb760a683 --- /dev/null +++ b/third_party/rust/nom/src/character/complete.rs @@ -0,0 +1,1227 @@ +//! Character specific parsers and combinators, complete input version. +//! +//! Functions recognizing specific characters. + +use crate::branch::alt; +use crate::combinator::opt; +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult}; +use crate::lib::std::ops::{Range, RangeFrom, RangeTo}; +use crate::traits::{ + AsChar, FindToken, InputIter, InputLength, InputTake, InputTakeAtPosition, Slice, +}; +use crate::traits::{Compare, CompareResult}; + +/// Recognizes one character. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{ErrorKind, Error}, IResult}; +/// # use nom::character::complete::char; +/// fn parser(i: &str) -> IResult<&str, char> { +/// char('a')(i) +/// } +/// assert_eq!(parser("abc"), Ok(("bc", 'a'))); +/// assert_eq!(parser(" abc"), Err(Err::Error(Error::new(" abc", ErrorKind::Char)))); +/// assert_eq!(parser("bc"), Err(Err::Error(Error::new("bc", ErrorKind::Char)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Char)))); +/// ``` +pub fn char<I, Error: ParseError<I>>(c: char) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar, +{ + move |i: I| match (i).iter_elements().next().map(|t| { + let b = t.as_char() == c; + (&c, b) + }) { + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + _ => Err(Err::Error(Error::from_char(i, c))), + } +} + +/// Recognizes one character and checks that it satisfies a predicate +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{ErrorKind, Error}, Needed, IResult}; +/// # use nom::character::complete::satisfy; +/// fn parser(i: &str) -> IResult<&str, char> { +/// satisfy(|c| c == 'a' || c == 'b')(i) +/// } +/// assert_eq!(parser("abc"), Ok(("bc", 'a'))); +/// assert_eq!(parser("cd"), Err(Err::Error(Error::new("cd", ErrorKind::Satisfy)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Satisfy)))); +/// ``` +pub fn satisfy<F, I, Error: ParseError<I>>(cond: F) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar, + F: Fn(char) -> bool, +{ + move |i: I| match (i).iter_elements().next().map(|t| { + let c = t.as_char(); + let b = cond(c); + (c, b) + }) { + Some((c, true)) => Ok((i.slice(c.len()..), c)), + _ => Err(Err::Error(Error::from_error_kind(i, ErrorKind::Satisfy))), + } +} + +/// Recognizes one of the provided characters. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind}; +/// # use nom::character::complete::one_of; +/// assert_eq!(one_of::<_, _, (&str, ErrorKind)>("abc")("b"), Ok(("", 'b'))); +/// assert_eq!(one_of::<_, _, (&str, ErrorKind)>("a")("bc"), Err(Err::Error(("bc", ErrorKind::OneOf)))); +/// assert_eq!(one_of::<_, _, (&str, ErrorKind)>("a")(""), Err(Err::Error(("", ErrorKind::OneOf)))); +/// ``` +pub fn one_of<I, T, Error: ParseError<I>>(list: T) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar + Copy, + T: FindToken<<I as InputIter>::Item>, +{ + move |i: I| match (i).iter_elements().next().map(|c| (c, list.find_token(c))) { + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + _ => Err(Err::Error(Error::from_error_kind(i, ErrorKind::OneOf))), + } +} + +/// Recognizes a character that is not in the provided characters. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind}; +/// # use nom::character::complete::none_of; +/// assert_eq!(none_of::<_, _, (&str, ErrorKind)>("abc")("z"), Ok(("", 'z'))); +/// assert_eq!(none_of::<_, _, (&str, ErrorKind)>("ab")("a"), Err(Err::Error(("a", ErrorKind::NoneOf)))); +/// assert_eq!(none_of::<_, _, (&str, ErrorKind)>("a")(""), Err(Err::Error(("", ErrorKind::NoneOf)))); +/// ``` +pub fn none_of<I, T, Error: ParseError<I>>(list: T) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar + Copy, + T: FindToken<<I as InputIter>::Item>, +{ + move |i: I| match (i).iter_elements().next().map(|c| (c, !list.find_token(c))) { + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + _ => Err(Err::Error(Error::from_error_kind(i, ErrorKind::NoneOf))), + } +} + +/// Recognizes the string "\r\n". +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult}; +/// # use nom::character::complete::crlf; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// crlf(input) +/// } +/// +/// assert_eq!(parser("\r\nc"), Ok(("c", "\r\n"))); +/// assert_eq!(parser("ab\r\nc"), Err(Err::Error(Error::new("ab\r\nc", ErrorKind::CrLf)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::CrLf)))); +/// ``` +pub fn crlf<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>>, + T: InputIter, + T: Compare<&'static str>, +{ + match input.compare("\r\n") { + //FIXME: is this the right index? + CompareResult::Ok => Ok((input.slice(2..), input.slice(0..2))), + _ => { + let e: ErrorKind = ErrorKind::CrLf; + Err(Err::Error(E::from_error_kind(input, e))) + } + } +} + +//FIXME: there's still an incomplete +/// Recognizes a string of any char except '\r\n' or '\n'. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::not_line_ending; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// not_line_ending(input) +/// } +/// +/// assert_eq!(parser("ab\r\nc"), Ok(("\r\nc", "ab"))); +/// assert_eq!(parser("ab\nc"), Ok(("\nc", "ab"))); +/// assert_eq!(parser("abc"), Ok(("", "abc"))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// assert_eq!(parser("a\rb\nc"), Err(Err::Error(Error { input: "a\rb\nc", code: ErrorKind::Tag }))); +/// assert_eq!(parser("a\rbc"), Err(Err::Error(Error { input: "a\rbc", code: ErrorKind::Tag }))); +/// ``` +pub fn not_line_ending<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: InputIter + InputLength, + T: Compare<&'static str>, + <T as InputIter>::Item: AsChar, + <T as InputIter>::Item: AsChar, +{ + match input.position(|item| { + let c = item.as_char(); + c == '\r' || c == '\n' + }) { + None => Ok((input.slice(input.input_len()..), input)), + Some(index) => { + let mut it = input.slice(index..).iter_elements(); + let nth = it.next().unwrap().as_char(); + if nth == '\r' { + let sliced = input.slice(index..); + let comp = sliced.compare("\r\n"); + match comp { + //FIXME: calculate the right index + CompareResult::Ok => Ok((input.slice(index..), input.slice(..index))), + _ => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(E::from_error_kind(input, e))) + } + } + } else { + Ok((input.slice(index..), input.slice(..index))) + } + } + } +} + +/// Recognizes an end of line (both '\n' and '\r\n'). +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::line_ending; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// line_ending(input) +/// } +/// +/// assert_eq!(parser("\r\nc"), Ok(("c", "\r\n"))); +/// assert_eq!(parser("ab\r\nc"), Err(Err::Error(Error::new("ab\r\nc", ErrorKind::CrLf)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::CrLf)))); +/// ``` +pub fn line_ending<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: InputIter + InputLength, + T: Compare<&'static str>, +{ + match input.compare("\n") { + CompareResult::Ok => Ok((input.slice(1..), input.slice(0..1))), + CompareResult::Incomplete => Err(Err::Error(E::from_error_kind(input, ErrorKind::CrLf))), + CompareResult::Error => { + match input.compare("\r\n") { + //FIXME: is this the right index? + CompareResult::Ok => Ok((input.slice(2..), input.slice(0..2))), + _ => Err(Err::Error(E::from_error_kind(input, ErrorKind::CrLf))), + } + } + } +} + +/// Matches a newline character '\n'. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::newline; +/// fn parser(input: &str) -> IResult<&str, char> { +/// newline(input) +/// } +/// +/// assert_eq!(parser("\nc"), Ok(("c", '\n'))); +/// assert_eq!(parser("\r\nc"), Err(Err::Error(Error::new("\r\nc", ErrorKind::Char)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Char)))); +/// ``` +pub fn newline<I, Error: ParseError<I>>(input: I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar, +{ + char('\n')(input) +} + +/// Matches a tab character '\t'. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::tab; +/// fn parser(input: &str) -> IResult<&str, char> { +/// tab(input) +/// } +/// +/// assert_eq!(parser("\tc"), Ok(("c", '\t'))); +/// assert_eq!(parser("\r\nc"), Err(Err::Error(Error::new("\r\nc", ErrorKind::Char)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Char)))); +/// ``` +pub fn tab<I, Error: ParseError<I>>(input: I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar, +{ + char('\t')(input) +} + +/// Matches one byte as a character. Note that the input type will +/// accept a `str`, but not a `&[u8]`, unlike many other nom parsers. +/// +/// *Complete version*: Will return an error if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{character::complete::anychar, Err, error::{Error, ErrorKind}, IResult}; +/// fn parser(input: &str) -> IResult<&str, char> { +/// anychar(input) +/// } +/// +/// assert_eq!(parser("abc"), Ok(("bc",'a'))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Eof)))); +/// ``` +pub fn anychar<T, E: ParseError<T>>(input: T) -> IResult<T, char, E> +where + T: InputIter + InputLength + Slice<RangeFrom<usize>>, + <T as InputIter>::Item: AsChar, +{ + let mut it = input.iter_indices(); + match it.next() { + None => Err(Err::Error(E::from_error_kind(input, ErrorKind::Eof))), + Some((_, c)) => match it.next() { + None => Ok((input.slice(input.input_len()..), c.as_char())), + Some((idx, _)) => Ok((input.slice(idx..), c.as_char())), + }, + } +} + +/// Recognizes zero or more lowercase and uppercase ASCII alphabetic characters: a-z, A-Z +/// +/// *Complete version*: Will return the whole input if no terminating token is found (a non +/// alphabetic character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::alpha0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alpha0(input) +/// } +/// +/// assert_eq!(parser("ab1c"), Ok(("1c", "ab"))); +/// assert_eq!(parser("1c"), Ok(("1c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn alpha0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position_complete(|item| !item.is_alpha()) +} + +/// Recognizes one or more lowercase and uppercase ASCII alphabetic characters: a-z, A-Z +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non alphabetic character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::alpha1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alpha1(input) +/// } +/// +/// assert_eq!(parser("aB1c"), Ok(("1c", "aB"))); +/// assert_eq!(parser("1c"), Err(Err::Error(Error::new("1c", ErrorKind::Alpha)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Alpha)))); +/// ``` +pub fn alpha1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1_complete(|item| !item.is_alpha(), ErrorKind::Alpha) +} + +/// Recognizes zero or more ASCII numerical characters: 0-9 +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::digit0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// digit0(input) +/// } +/// +/// assert_eq!(parser("21c"), Ok(("c", "21"))); +/// assert_eq!(parser("21"), Ok(("", "21"))); +/// assert_eq!(parser("a21c"), Ok(("a21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position_complete(|item| !item.is_dec_digit()) +} + +/// Recognizes one or more ASCII numerical characters: 0-9 +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::digit1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// digit1(input) +/// } +/// +/// assert_eq!(parser("21c"), Ok(("c", "21"))); +/// assert_eq!(parser("c1"), Err(Err::Error(Error::new("c1", ErrorKind::Digit)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Digit)))); +/// ``` +/// +/// ## Parsing an integer +/// You can use `digit1` in combination with [`map_res`] to parse an integer: +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::combinator::map_res; +/// # use nom::character::complete::digit1; +/// fn parser(input: &str) -> IResult<&str, u32> { +/// map_res(digit1, str::parse)(input) +/// } +/// +/// assert_eq!(parser("416"), Ok(("", 416))); +/// assert_eq!(parser("12b"), Ok(("b", 12))); +/// assert!(parser("b").is_err()); +/// ``` +/// +/// [`map_res`]: crate::combinator::map_res +pub fn digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1_complete(|item| !item.is_dec_digit(), ErrorKind::Digit) +} + +/// Recognizes zero or more ASCII hexadecimal numerical characters: 0-9, A-F, a-f +/// +/// *Complete version*: Will return the whole input if no terminating token is found (a non hexadecimal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::hex_digit0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// hex_digit0(input) +/// } +/// +/// assert_eq!(parser("21cZ"), Ok(("Z", "21c"))); +/// assert_eq!(parser("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn hex_digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position_complete(|item| !item.is_hex_digit()) +} +/// Recognizes one or more ASCII hexadecimal numerical characters: 0-9, A-F, a-f +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non hexadecimal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::hex_digit1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// hex_digit1(input) +/// } +/// +/// assert_eq!(parser("21cZ"), Ok(("Z", "21c"))); +/// assert_eq!(parser("H2"), Err(Err::Error(Error::new("H2", ErrorKind::HexDigit)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::HexDigit)))); +/// ``` +pub fn hex_digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1_complete(|item| !item.is_hex_digit(), ErrorKind::HexDigit) +} + +/// Recognizes zero or more octal characters: 0-7 +/// +/// *Complete version*: Will return the whole input if no terminating token is found (a non octal +/// digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::oct_digit0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// oct_digit0(input) +/// } +/// +/// assert_eq!(parser("21cZ"), Ok(("cZ", "21"))); +/// assert_eq!(parser("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn oct_digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position_complete(|item| !item.is_oct_digit()) +} + +/// Recognizes one or more octal characters: 0-7 +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non octal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::oct_digit1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// oct_digit1(input) +/// } +/// +/// assert_eq!(parser("21cZ"), Ok(("cZ", "21"))); +/// assert_eq!(parser("H2"), Err(Err::Error(Error::new("H2", ErrorKind::OctDigit)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::OctDigit)))); +/// ``` +pub fn oct_digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1_complete(|item| !item.is_oct_digit(), ErrorKind::OctDigit) +} + +/// Recognizes zero or more ASCII numerical and alphabetic characters: 0-9, a-z, A-Z +/// +/// *Complete version*: Will return the whole input if no terminating token is found (a non +/// alphanumerical character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::alphanumeric0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alphanumeric0(input) +/// } +/// +/// assert_eq!(parser("21cZ%1"), Ok(("%1", "21cZ"))); +/// assert_eq!(parser("&Z21c"), Ok(("&Z21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn alphanumeric0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position_complete(|item| !item.is_alphanum()) +} + +/// Recognizes one or more ASCII numerical and alphabetic characters: 0-9, a-z, A-Z +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non alphanumerical character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::alphanumeric1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alphanumeric1(input) +/// } +/// +/// assert_eq!(parser("21cZ%1"), Ok(("%1", "21cZ"))); +/// assert_eq!(parser("&H2"), Err(Err::Error(Error::new("&H2", ErrorKind::AlphaNumeric)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::AlphaNumeric)))); +/// ``` +pub fn alphanumeric1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1_complete(|item| !item.is_alphanum(), ErrorKind::AlphaNumeric) +} + +/// Recognizes zero or more spaces and tabs. +/// +/// *Complete version*: Will return the whole input if no terminating token is found (a non space +/// character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::space0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// space0(input) +/// } +/// +/// assert_eq!(parser(" \t21c"), Ok(("21c", " \t"))); +/// assert_eq!(parser("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn space0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position_complete(|item| { + let c = item.as_char(); + !(c == ' ' || c == '\t') + }) +} + +/// Recognizes one or more spaces and tabs. +/// +/// *Complete version*: Will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::space1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// space1(input) +/// } +/// +/// assert_eq!(parser(" \t21c"), Ok(("21c", " \t"))); +/// assert_eq!(parser("H2"), Err(Err::Error(Error::new("H2", ErrorKind::Space)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Space)))); +/// ``` +pub fn space1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position1_complete( + |item| { + let c = item.as_char(); + !(c == ' ' || c == '\t') + }, + ErrorKind::Space, + ) +} + +/// Recognizes zero or more spaces, tabs, carriage returns and line feeds. +/// +/// *Complete version*: will return the whole input if no terminating token is found (a non space +/// character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::complete::multispace0; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// multispace0(input) +/// } +/// +/// assert_eq!(parser(" \t\n\r21c"), Ok(("21c", " \t\n\r"))); +/// assert_eq!(parser("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// ``` +pub fn multispace0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position_complete(|item| { + let c = item.as_char(); + !(c == ' ' || c == '\t' || c == '\r' || c == '\n') + }) +} + +/// Recognizes one or more spaces, tabs, carriage returns and line feeds. +/// +/// *Complete version*: will return an error if there's not enough input data, +/// or the whole input if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::complete::multispace1; +/// fn parser(input: &str) -> IResult<&str, &str> { +/// multispace1(input) +/// } +/// +/// assert_eq!(parser(" \t\n\r21c"), Ok(("21c", " \t\n\r"))); +/// assert_eq!(parser("H2"), Err(Err::Error(Error::new("H2", ErrorKind::MultiSpace)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::MultiSpace)))); +/// ``` +pub fn multispace1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position1_complete( + |item| { + let c = item.as_char(); + !(c == ' ' || c == '\t' || c == '\r' || c == '\n') + }, + ErrorKind::MultiSpace, + ) +} + +pub(crate) fn sign<T, E: ParseError<T>>(input: T) -> IResult<T, bool, E> +where + T: Clone + InputTake, + T: for<'a> Compare<&'a [u8]>, +{ + use crate::bytes::complete::tag; + use crate::combinator::value; + + let (i, opt_sign) = opt(alt(( + value(false, tag(&b"-"[..])), + value(true, tag(&b"+"[..])), + )))(input)?; + let sign = opt_sign.unwrap_or(true); + + Ok((i, sign)) +} + +#[doc(hidden)] +macro_rules! ints { + ($($t:tt)+) => { + $( + /// will parse a number in text form to a number + /// + /// *Complete version*: can parse until the end of input. + pub fn $t<T, E: ParseError<T>>(input: T) -> IResult<T, $t, E> + where + T: InputIter + Slice<RangeFrom<usize>> + InputLength + InputTake + Clone, + <T as InputIter>::Item: AsChar, + T: for <'a> Compare<&'a[u8]>, + { + let (i, sign) = sign(input.clone())?; + + if i.input_len() == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))); + } + + let mut value: $t = 0; + if sign { + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_add(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + } else { + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_sub(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + } + + Ok((i.slice(i.input_len()..), value)) + } + )+ + } +} + +ints! { i8 i16 i32 i64 i128 } + +#[doc(hidden)] +macro_rules! uints { + ($($t:tt)+) => { + $( + /// will parse a number in text form to a number + /// + /// *Complete version*: can parse until the end of input. + pub fn $t<T, E: ParseError<T>>(input: T) -> IResult<T, $t, E> + where + T: InputIter + Slice<RangeFrom<usize>> + InputLength, + <T as InputIter>::Item: AsChar, + { + let i = input; + + if i.input_len() == 0 { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Digit))); + } + + let mut value: $t = 0; + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_add(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(i, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + + Ok((i.slice(i.input_len()..), value)) + } + )+ + } +} + +uints! { u8 u16 u32 u64 u128 } + +#[cfg(test)] +mod tests { + use super::*; + use crate::internal::Err; + use crate::traits::ParseTo; + use proptest::prelude::*; + + macro_rules! assert_parse( + ($left: expr, $right: expr) => { + let res: $crate::IResult<_, _, (_, ErrorKind)> = $left; + assert_eq!(res, $right); + }; + ); + + #[test] + fn character() { + let empty: &[u8] = b""; + let a: &[u8] = b"abcd"; + let b: &[u8] = b"1234"; + let c: &[u8] = b"a123"; + let d: &[u8] = "azé12".as_bytes(); + let e: &[u8] = b" "; + let f: &[u8] = b" ;"; + //assert_eq!(alpha1::<_, (_, ErrorKind)>(a), Err(Err::Incomplete(Needed::Size(1)))); + assert_parse!(alpha1(a), Ok((empty, a))); + assert_eq!(alpha1(b), Err(Err::Error((b, ErrorKind::Alpha)))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(c), Ok((&c[1..], &b"a"[..]))); + assert_eq!( + alpha1::<_, (_, ErrorKind)>(d), + Ok(("é12".as_bytes(), &b"az"[..])) + ); + assert_eq!(digit1(a), Err(Err::Error((a, ErrorKind::Digit)))); + assert_eq!(digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(digit1(c), Err(Err::Error((c, ErrorKind::Digit)))); + assert_eq!(digit1(d), Err(Err::Error((d, ErrorKind::Digit)))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(a), Ok((empty, a))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(c), Ok((empty, c))); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(d), + Ok(("zé12".as_bytes(), &b"a"[..])) + ); + assert_eq!(hex_digit1(e), Err(Err::Error((e, ErrorKind::HexDigit)))); + assert_eq!(oct_digit1(a), Err(Err::Error((a, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(oct_digit1(c), Err(Err::Error((c, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1(d), Err(Err::Error((d, ErrorKind::OctDigit)))); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(a), Ok((empty, a))); + //assert_eq!(fix_error!(b,(), alphanumeric), Ok((empty, b))); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(c), Ok((empty, c))); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(d), + Ok(("é12".as_bytes(), &b"az"[..])) + ); + assert_eq!(space1::<_, (_, ErrorKind)>(e), Ok((empty, e))); + assert_eq!(space1::<_, (_, ErrorKind)>(f), Ok((&b";"[..], &b" "[..]))); + } + + #[cfg(feature = "alloc")] + #[test] + fn character_s() { + let empty = ""; + let a = "abcd"; + let b = "1234"; + let c = "a123"; + let d = "azé12"; + let e = " "; + assert_eq!(alpha1::<_, (_, ErrorKind)>(a), Ok((empty, a))); + assert_eq!(alpha1(b), Err(Err::Error((b, ErrorKind::Alpha)))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(c), Ok((&c[1..], &"a"[..]))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(d), Ok(("é12", &"az"[..]))); + assert_eq!(digit1(a), Err(Err::Error((a, ErrorKind::Digit)))); + assert_eq!(digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(digit1(c), Err(Err::Error((c, ErrorKind::Digit)))); + assert_eq!(digit1(d), Err(Err::Error((d, ErrorKind::Digit)))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(a), Ok((empty, a))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(c), Ok((empty, c))); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(d), Ok(("zé12", &"a"[..]))); + assert_eq!(hex_digit1(e), Err(Err::Error((e, ErrorKind::HexDigit)))); + assert_eq!(oct_digit1(a), Err(Err::Error((a, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1::<_, (_, ErrorKind)>(b), Ok((empty, b))); + assert_eq!(oct_digit1(c), Err(Err::Error((c, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1(d), Err(Err::Error((d, ErrorKind::OctDigit)))); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(a), Ok((empty, a))); + //assert_eq!(fix_error!(b,(), alphanumeric), Ok((empty, b))); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(c), Ok((empty, c))); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(d), Ok(("é12", "az"))); + assert_eq!(space1::<_, (_, ErrorKind)>(e), Ok((empty, e))); + } + + use crate::traits::Offset; + #[test] + fn offset() { + let a = &b"abcd;"[..]; + let b = &b"1234;"[..]; + let c = &b"a123;"[..]; + let d = &b" \t;"[..]; + let e = &b" \t\r\n;"[..]; + let f = &b"123abcDEF;"[..]; + + match alpha1::<_, (_, ErrorKind)>(a) { + Ok((i, _)) => { + assert_eq!(a.offset(i) + i.len(), a.len()); + } + _ => panic!("wrong return type in offset test for alpha"), + } + match digit1::<_, (_, ErrorKind)>(b) { + Ok((i, _)) => { + assert_eq!(b.offset(i) + i.len(), b.len()); + } + _ => panic!("wrong return type in offset test for digit"), + } + match alphanumeric1::<_, (_, ErrorKind)>(c) { + Ok((i, _)) => { + assert_eq!(c.offset(i) + i.len(), c.len()); + } + _ => panic!("wrong return type in offset test for alphanumeric"), + } + match space1::<_, (_, ErrorKind)>(d) { + Ok((i, _)) => { + assert_eq!(d.offset(i) + i.len(), d.len()); + } + _ => panic!("wrong return type in offset test for space"), + } + match multispace1::<_, (_, ErrorKind)>(e) { + Ok((i, _)) => { + assert_eq!(e.offset(i) + i.len(), e.len()); + } + _ => panic!("wrong return type in offset test for multispace"), + } + match hex_digit1::<_, (_, ErrorKind)>(f) { + Ok((i, _)) => { + assert_eq!(f.offset(i) + i.len(), f.len()); + } + _ => panic!("wrong return type in offset test for hex_digit"), + } + match oct_digit1::<_, (_, ErrorKind)>(f) { + Ok((i, _)) => { + assert_eq!(f.offset(i) + i.len(), f.len()); + } + _ => panic!("wrong return type in offset test for oct_digit"), + } + } + + #[test] + fn is_not_line_ending_bytes() { + let a: &[u8] = b"ab12cd\nefgh"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(a), + Ok((&b"\nefgh"[..], &b"ab12cd"[..])) + ); + + let b: &[u8] = b"ab12cd\nefgh\nijkl"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(b), + Ok((&b"\nefgh\nijkl"[..], &b"ab12cd"[..])) + ); + + let c: &[u8] = b"ab12cd\r\nefgh\nijkl"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(c), + Ok((&b"\r\nefgh\nijkl"[..], &b"ab12cd"[..])) + ); + + let d: &[u8] = b"ab12cd"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(d), + Ok((&[][..], &d[..])) + ); + } + + #[test] + fn is_not_line_ending_str() { + /* + let a: &str = "ab12cd\nefgh"; + assert_eq!(not_line_ending(a), Ok((&"\nefgh"[..], &"ab12cd"[..]))); + + let b: &str = "ab12cd\nefgh\nijkl"; + assert_eq!(not_line_ending(b), Ok((&"\nefgh\nijkl"[..], &"ab12cd"[..]))); + + let c: &str = "ab12cd\r\nefgh\nijkl"; + assert_eq!(not_line_ending(c), Ok((&"\r\nefgh\nijkl"[..], &"ab12cd"[..]))); + + let d = "βèƒôřè\nÂßÇáƒƭèř"; + assert_eq!(not_line_ending(d), Ok((&"\nÂßÇáƒƭèř"[..], &"βèƒôřè"[..]))); + + let e = "βèƒôřè\r\nÂßÇáƒƭèř"; + assert_eq!(not_line_ending(e), Ok((&"\r\nÂßÇáƒƭèř"[..], &"βèƒôřè"[..]))); + */ + + let f = "βèƒôřè\rÂßÇáƒƭèř"; + assert_eq!(not_line_ending(f), Err(Err::Error((f, ErrorKind::Tag)))); + + let g2: &str = "ab12cd"; + assert_eq!(not_line_ending::<_, (_, ErrorKind)>(g2), Ok(("", g2))); + } + + #[test] + fn hex_digit_test() { + let i = &b"0123456789abcdefABCDEF;"[..]; + assert_parse!(hex_digit1(i), Ok((&b";"[..], &i[..i.len() - 1]))); + + let i = &b"g"[..]; + assert_parse!( + hex_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::HexDigit))) + ); + + let i = &b"G"[..]; + assert_parse!( + hex_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::HexDigit))) + ); + + assert!(crate::character::is_hex_digit(b'0')); + assert!(crate::character::is_hex_digit(b'9')); + assert!(crate::character::is_hex_digit(b'a')); + assert!(crate::character::is_hex_digit(b'f')); + assert!(crate::character::is_hex_digit(b'A')); + assert!(crate::character::is_hex_digit(b'F')); + assert!(!crate::character::is_hex_digit(b'g')); + assert!(!crate::character::is_hex_digit(b'G')); + assert!(!crate::character::is_hex_digit(b'/')); + assert!(!crate::character::is_hex_digit(b':')); + assert!(!crate::character::is_hex_digit(b'@')); + assert!(!crate::character::is_hex_digit(b'\x60')); + } + + #[test] + fn oct_digit_test() { + let i = &b"01234567;"[..]; + assert_parse!(oct_digit1(i), Ok((&b";"[..], &i[..i.len() - 1]))); + + let i = &b"8"[..]; + assert_parse!( + oct_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::OctDigit))) + ); + + assert!(crate::character::is_oct_digit(b'0')); + assert!(crate::character::is_oct_digit(b'7')); + assert!(!crate::character::is_oct_digit(b'8')); + assert!(!crate::character::is_oct_digit(b'9')); + assert!(!crate::character::is_oct_digit(b'a')); + assert!(!crate::character::is_oct_digit(b'A')); + assert!(!crate::character::is_oct_digit(b'/')); + assert!(!crate::character::is_oct_digit(b':')); + assert!(!crate::character::is_oct_digit(b'@')); + assert!(!crate::character::is_oct_digit(b'\x60')); + } + + #[test] + fn full_line_windows() { + use crate::sequence::pair; + fn take_full_line(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + pair(not_line_ending, line_ending)(i) + } + let input = b"abc\r\n"; + let output = take_full_line(input); + assert_eq!(output, Ok((&b""[..], (&b"abc"[..], &b"\r\n"[..])))); + } + + #[test] + fn full_line_unix() { + use crate::sequence::pair; + fn take_full_line(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + pair(not_line_ending, line_ending)(i) + } + let input = b"abc\n"; + let output = take_full_line(input); + assert_eq!(output, Ok((&b""[..], (&b"abc"[..], &b"\n"[..])))); + } + + #[test] + fn check_windows_lineending() { + let input = b"\r\n"; + let output = line_ending(&input[..]); + assert_parse!(output, Ok((&b""[..], &b"\r\n"[..]))); + } + + #[test] + fn check_unix_lineending() { + let input = b"\n"; + let output = line_ending(&input[..]); + assert_parse!(output, Ok((&b""[..], &b"\n"[..]))); + } + + #[test] + fn cr_lf() { + assert_parse!(crlf(&b"\r\na"[..]), Ok((&b"a"[..], &b"\r\n"[..]))); + assert_parse!( + crlf(&b"\r"[..]), + Err(Err::Error(error_position!(&b"\r"[..], ErrorKind::CrLf))) + ); + assert_parse!( + crlf(&b"\ra"[..]), + Err(Err::Error(error_position!(&b"\ra"[..], ErrorKind::CrLf))) + ); + + assert_parse!(crlf("\r\na"), Ok(("a", "\r\n"))); + assert_parse!( + crlf("\r"), + Err(Err::Error(error_position!(&"\r"[..], ErrorKind::CrLf))) + ); + assert_parse!( + crlf("\ra"), + Err(Err::Error(error_position!("\ra", ErrorKind::CrLf))) + ); + } + + #[test] + fn end_of_line() { + assert_parse!(line_ending(&b"\na"[..]), Ok((&b"a"[..], &b"\n"[..]))); + assert_parse!(line_ending(&b"\r\na"[..]), Ok((&b"a"[..], &b"\r\n"[..]))); + assert_parse!( + line_ending(&b"\r"[..]), + Err(Err::Error(error_position!(&b"\r"[..], ErrorKind::CrLf))) + ); + assert_parse!( + line_ending(&b"\ra"[..]), + Err(Err::Error(error_position!(&b"\ra"[..], ErrorKind::CrLf))) + ); + + assert_parse!(line_ending("\na"), Ok(("a", "\n"))); + assert_parse!(line_ending("\r\na"), Ok(("a", "\r\n"))); + assert_parse!( + line_ending("\r"), + Err(Err::Error(error_position!(&"\r"[..], ErrorKind::CrLf))) + ); + assert_parse!( + line_ending("\ra"), + Err(Err::Error(error_position!("\ra", ErrorKind::CrLf))) + ); + } + + fn digit_to_i16(input: &str) -> IResult<&str, i16> { + let i = input; + let (i, opt_sign) = opt(alt((char('+'), char('-'))))(i)?; + let sign = match opt_sign { + Some('+') => true, + Some('-') => false, + _ => true, + }; + + let (i, s) = match digit1::<_, crate::error::Error<_>>(i) { + Ok((i, s)) => (i, s), + Err(_) => { + return Err(Err::Error(crate::error::Error::from_error_kind( + input, + ErrorKind::Digit, + ))) + } + }; + + match s.parse_to() { + Some(n) => { + if sign { + Ok((i, n)) + } else { + Ok((i, -n)) + } + } + None => Err(Err::Error(crate::error::Error::from_error_kind( + i, + ErrorKind::Digit, + ))), + } + } + + fn digit_to_u32(i: &str) -> IResult<&str, u32> { + let (i, s) = digit1(i)?; + match s.parse_to() { + Some(n) => Ok((i, n)), + None => Err(Err::Error(crate::error::Error::from_error_kind( + i, + ErrorKind::Digit, + ))), + } + } + + proptest! { + #[test] + fn ints(s in "\\PC*") { + let res1 = digit_to_i16(&s); + let res2 = i16(s.as_str()); + assert_eq!(res1, res2); + } + + #[test] + fn uints(s in "\\PC*") { + let res1 = digit_to_u32(&s); + let res2 = u32(s.as_str()); + assert_eq!(res1, res2); + } + } +} diff --git a/third_party/rust/nom/src/character/mod.rs b/third_party/rust/nom/src/character/mod.rs new file mode 100644 index 0000000000..2c5d3bc4ad --- /dev/null +++ b/third_party/rust/nom/src/character/mod.rs @@ -0,0 +1,116 @@ +//! Character specific parsers and combinators +//! +//! Functions recognizing specific characters + +#[cfg(test)] +mod tests; + +pub mod complete; +pub mod streaming; + +/// Tests if byte is ASCII alphabetic: A-Z, a-z +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_alphabetic; +/// assert_eq!(is_alphabetic(b'9'), false); +/// assert_eq!(is_alphabetic(b'a'), true); +/// ``` +#[inline] +pub fn is_alphabetic(chr: u8) -> bool { + (chr >= 0x41 && chr <= 0x5A) || (chr >= 0x61 && chr <= 0x7A) +} + +/// Tests if byte is ASCII digit: 0-9 +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_digit; +/// assert_eq!(is_digit(b'a'), false); +/// assert_eq!(is_digit(b'9'), true); +/// ``` +#[inline] +pub fn is_digit(chr: u8) -> bool { + chr >= 0x30 && chr <= 0x39 +} + +/// Tests if byte is ASCII hex digit: 0-9, A-F, a-f +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_hex_digit; +/// assert_eq!(is_hex_digit(b'a'), true); +/// assert_eq!(is_hex_digit(b'9'), true); +/// assert_eq!(is_hex_digit(b'A'), true); +/// assert_eq!(is_hex_digit(b'x'), false); +/// ``` +#[inline] +pub fn is_hex_digit(chr: u8) -> bool { + (chr >= 0x30 && chr <= 0x39) || (chr >= 0x41 && chr <= 0x46) || (chr >= 0x61 && chr <= 0x66) +} + +/// Tests if byte is ASCII octal digit: 0-7 +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_oct_digit; +/// assert_eq!(is_oct_digit(b'a'), false); +/// assert_eq!(is_oct_digit(b'9'), false); +/// assert_eq!(is_oct_digit(b'6'), true); +/// ``` +#[inline] +pub fn is_oct_digit(chr: u8) -> bool { + chr >= 0x30 && chr <= 0x37 +} + +/// Tests if byte is ASCII alphanumeric: A-Z, a-z, 0-9 +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_alphanumeric; +/// assert_eq!(is_alphanumeric(b'-'), false); +/// assert_eq!(is_alphanumeric(b'a'), true); +/// assert_eq!(is_alphanumeric(b'9'), true); +/// assert_eq!(is_alphanumeric(b'A'), true); +/// ``` +#[inline] +pub fn is_alphanumeric(chr: u8) -> bool { + is_alphabetic(chr) || is_digit(chr) +} + +/// Tests if byte is ASCII space or tab +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_space; +/// assert_eq!(is_space(b'\n'), false); +/// assert_eq!(is_space(b'\r'), false); +/// assert_eq!(is_space(b' '), true); +/// assert_eq!(is_space(b'\t'), true); +/// ``` +#[inline] +pub fn is_space(chr: u8) -> bool { + chr == b' ' || chr == b'\t' +} + +/// Tests if byte is ASCII newline: \n +/// +/// # Example +/// +/// ``` +/// # use nom::character::is_newline; +/// assert_eq!(is_newline(b'\n'), true); +/// assert_eq!(is_newline(b'\r'), false); +/// assert_eq!(is_newline(b' '), false); +/// assert_eq!(is_newline(b'\t'), false); +/// ``` +#[inline] +pub fn is_newline(chr: u8) -> bool { + chr == b'\n' +} diff --git a/third_party/rust/nom/src/character/streaming.rs b/third_party/rust/nom/src/character/streaming.rs new file mode 100644 index 0000000000..88aabba356 --- /dev/null +++ b/third_party/rust/nom/src/character/streaming.rs @@ -0,0 +1,1182 @@ +//! Character specific parsers and combinators, streaming version +//! +//! Functions recognizing specific characters + +use crate::branch::alt; +use crate::combinator::opt; +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Needed}; +use crate::lib::std::ops::{Range, RangeFrom, RangeTo}; +use crate::traits::{ + AsChar, FindToken, InputIter, InputLength, InputTake, InputTakeAtPosition, Slice, +}; +use crate::traits::{Compare, CompareResult}; + +/// Recognizes one character. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{ErrorKind, Error}, Needed, IResult}; +/// # use nom::character::streaming::char; +/// fn parser(i: &str) -> IResult<&str, char> { +/// char('a')(i) +/// } +/// assert_eq!(parser("abc"), Ok(("bc", 'a'))); +/// assert_eq!(parser("bc"), Err(Err::Error(Error::new("bc", ErrorKind::Char)))); +/// assert_eq!(parser(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn char<I, Error: ParseError<I>>(c: char) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter + InputLength, + <I as InputIter>::Item: AsChar, +{ + move |i: I| match (i).iter_elements().next().map(|t| { + let b = t.as_char() == c; + (&c, b) + }) { + None => Err(Err::Incomplete(Needed::new(c.len() - i.input_len()))), + Some((_, false)) => Err(Err::Error(Error::from_char(i, c))), + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + } +} + +/// Recognizes one character and checks that it satisfies a predicate +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{ErrorKind, Error}, Needed, IResult}; +/// # use nom::character::streaming::satisfy; +/// fn parser(i: &str) -> IResult<&str, char> { +/// satisfy(|c| c == 'a' || c == 'b')(i) +/// } +/// assert_eq!(parser("abc"), Ok(("bc", 'a'))); +/// assert_eq!(parser("cd"), Err(Err::Error(Error::new("cd", ErrorKind::Satisfy)))); +/// assert_eq!(parser(""), Err(Err::Incomplete(Needed::Unknown))); +/// ``` +pub fn satisfy<F, I, Error: ParseError<I>>(cond: F) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar, + F: Fn(char) -> bool, +{ + move |i: I| match (i).iter_elements().next().map(|t| { + let c = t.as_char(); + let b = cond(c); + (c, b) + }) { + None => Err(Err::Incomplete(Needed::Unknown)), + Some((_, false)) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::Satisfy))), + Some((c, true)) => Ok((i.slice(c.len()..), c)), + } +} + +/// Recognizes one of the provided characters. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::character::streaming::one_of; +/// assert_eq!(one_of::<_, _, (_, ErrorKind)>("abc")("b"), Ok(("", 'b'))); +/// assert_eq!(one_of::<_, _, (_, ErrorKind)>("a")("bc"), Err(Err::Error(("bc", ErrorKind::OneOf)))); +/// assert_eq!(one_of::<_, _, (_, ErrorKind)>("a")(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn one_of<I, T, Error: ParseError<I>>(list: T) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar + Copy, + T: FindToken<<I as InputIter>::Item>, +{ + move |i: I| match (i).iter_elements().next().map(|c| (c, list.find_token(c))) { + None => Err(Err::Incomplete(Needed::new(1))), + Some((_, false)) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::OneOf))), + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + } +} + +/// Recognizes a character that is not in the provided characters. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::character::streaming::none_of; +/// assert_eq!(none_of::<_, _, (_, ErrorKind)>("abc")("z"), Ok(("", 'z'))); +/// assert_eq!(none_of::<_, _, (_, ErrorKind)>("ab")("a"), Err(Err::Error(("a", ErrorKind::NoneOf)))); +/// assert_eq!(none_of::<_, _, (_, ErrorKind)>("a")(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn none_of<I, T, Error: ParseError<I>>(list: T) -> impl Fn(I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter, + <I as InputIter>::Item: AsChar + Copy, + T: FindToken<<I as InputIter>::Item>, +{ + move |i: I| match (i).iter_elements().next().map(|c| (c, !list.find_token(c))) { + None => Err(Err::Incomplete(Needed::new(1))), + Some((_, false)) => Err(Err::Error(Error::from_error_kind(i, ErrorKind::NoneOf))), + Some((c, true)) => Ok((i.slice(c.len()..), c.as_char())), + } +} + +/// Recognizes the string "\r\n". +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::crlf; +/// assert_eq!(crlf::<_, (_, ErrorKind)>("\r\nc"), Ok(("c", "\r\n"))); +/// assert_eq!(crlf::<_, (_, ErrorKind)>("ab\r\nc"), Err(Err::Error(("ab\r\nc", ErrorKind::CrLf)))); +/// assert_eq!(crlf::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +pub fn crlf<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: InputIter, + T: Compare<&'static str>, +{ + match input.compare("\r\n") { + //FIXME: is this the right index? + CompareResult::Ok => Ok((input.slice(2..), input.slice(0..2))), + CompareResult::Incomplete => Err(Err::Incomplete(Needed::new(2))), + CompareResult::Error => { + let e: ErrorKind = ErrorKind::CrLf; + Err(Err::Error(E::from_error_kind(input, e))) + } + } +} + +/// Recognizes a string of any char except '\r\n' or '\n'. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::{Error, ErrorKind}, IResult, Needed}; +/// # use nom::character::streaming::not_line_ending; +/// assert_eq!(not_line_ending::<_, (_, ErrorKind)>("ab\r\nc"), Ok(("\r\nc", "ab"))); +/// assert_eq!(not_line_ending::<_, (_, ErrorKind)>("abc"), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(not_line_ending::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::Unknown))); +/// assert_eq!(not_line_ending::<_, (_, ErrorKind)>("a\rb\nc"), Err(Err::Error(("a\rb\nc", ErrorKind::Tag )))); +/// assert_eq!(not_line_ending::<_, (_, ErrorKind)>("a\rbc"), Err(Err::Error(("a\rbc", ErrorKind::Tag )))); +/// ``` +pub fn not_line_ending<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: InputIter + InputLength, + T: Compare<&'static str>, + <T as InputIter>::Item: AsChar, + <T as InputIter>::Item: AsChar, +{ + match input.position(|item| { + let c = item.as_char(); + c == '\r' || c == '\n' + }) { + None => Err(Err::Incomplete(Needed::Unknown)), + Some(index) => { + let mut it = input.slice(index..).iter_elements(); + let nth = it.next().unwrap().as_char(); + if nth == '\r' { + let sliced = input.slice(index..); + let comp = sliced.compare("\r\n"); + match comp { + //FIXME: calculate the right index + CompareResult::Incomplete => Err(Err::Incomplete(Needed::Unknown)), + CompareResult::Error => { + let e: ErrorKind = ErrorKind::Tag; + Err(Err::Error(E::from_error_kind(input, e))) + } + CompareResult::Ok => Ok((input.slice(index..), input.slice(..index))), + } + } else { + Ok((input.slice(index..), input.slice(..index))) + } + } + } +} + +/// Recognizes an end of line (both '\n' and '\r\n'). +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::line_ending; +/// assert_eq!(line_ending::<_, (_, ErrorKind)>("\r\nc"), Ok(("c", "\r\n"))); +/// assert_eq!(line_ending::<_, (_, ErrorKind)>("ab\r\nc"), Err(Err::Error(("ab\r\nc", ErrorKind::CrLf)))); +/// assert_eq!(line_ending::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn line_ending<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: InputIter + InputLength, + T: Compare<&'static str>, +{ + match input.compare("\n") { + CompareResult::Ok => Ok((input.slice(1..), input.slice(0..1))), + CompareResult::Incomplete => Err(Err::Incomplete(Needed::new(1))), + CompareResult::Error => { + match input.compare("\r\n") { + //FIXME: is this the right index? + CompareResult::Ok => Ok((input.slice(2..), input.slice(0..2))), + CompareResult::Incomplete => Err(Err::Incomplete(Needed::new(2))), + CompareResult::Error => Err(Err::Error(E::from_error_kind(input, ErrorKind::CrLf))), + } + } + } +} + +/// Matches a newline character '\\n'. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::newline; +/// assert_eq!(newline::<_, (_, ErrorKind)>("\nc"), Ok(("c", '\n'))); +/// assert_eq!(newline::<_, (_, ErrorKind)>("\r\nc"), Err(Err::Error(("\r\nc", ErrorKind::Char)))); +/// assert_eq!(newline::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn newline<I, Error: ParseError<I>>(input: I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter + InputLength, + <I as InputIter>::Item: AsChar, +{ + char('\n')(input) +} + +/// Matches a tab character '\t'. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::tab; +/// assert_eq!(tab::<_, (_, ErrorKind)>("\tc"), Ok(("c", '\t'))); +/// assert_eq!(tab::<_, (_, ErrorKind)>("\r\nc"), Err(Err::Error(("\r\nc", ErrorKind::Char)))); +/// assert_eq!(tab::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn tab<I, Error: ParseError<I>>(input: I) -> IResult<I, char, Error> +where + I: Slice<RangeFrom<usize>> + InputIter + InputLength, + <I as InputIter>::Item: AsChar, +{ + char('\t')(input) +} + +/// Matches one byte as a character. Note that the input type will +/// accept a `str`, but not a `&[u8]`, unlike many other nom parsers. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data. +/// # Example +/// +/// ``` +/// # use nom::{character::streaming::anychar, Err, error::ErrorKind, IResult, Needed}; +/// assert_eq!(anychar::<_, (_, ErrorKind)>("abc"), Ok(("bc",'a'))); +/// assert_eq!(anychar::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn anychar<T, E: ParseError<T>>(input: T) -> IResult<T, char, E> +where + T: InputIter + InputLength + Slice<RangeFrom<usize>>, + <T as InputIter>::Item: AsChar, +{ + let mut it = input.iter_indices(); + match it.next() { + None => Err(Err::Incomplete(Needed::new(1))), + Some((_, c)) => match it.next() { + None => Ok((input.slice(input.input_len()..), c.as_char())), + Some((idx, _)) => Ok((input.slice(idx..), c.as_char())), + }, + } +} + +/// Recognizes zero or more lowercase and uppercase ASCII alphabetic characters: a-z, A-Z +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non alphabetic character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::alpha0; +/// assert_eq!(alpha0::<_, (_, ErrorKind)>("ab1c"), Ok(("1c", "ab"))); +/// assert_eq!(alpha0::<_, (_, ErrorKind)>("1c"), Ok(("1c", ""))); +/// assert_eq!(alpha0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn alpha0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position(|item| !item.is_alpha()) +} + +/// Recognizes one or more lowercase and uppercase ASCII alphabetic characters: a-z, A-Z +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non alphabetic character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::alpha1; +/// assert_eq!(alpha1::<_, (_, ErrorKind)>("aB1c"), Ok(("1c", "aB"))); +/// assert_eq!(alpha1::<_, (_, ErrorKind)>("1c"), Err(Err::Error(("1c", ErrorKind::Alpha)))); +/// assert_eq!(alpha1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn alpha1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1(|item| !item.is_alpha(), ErrorKind::Alpha) +} + +/// Recognizes zero or more ASCII numerical characters: 0-9 +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::digit0; +/// assert_eq!(digit0::<_, (_, ErrorKind)>("21c"), Ok(("c", "21"))); +/// assert_eq!(digit0::<_, (_, ErrorKind)>("a21c"), Ok(("a21c", ""))); +/// assert_eq!(digit0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position(|item| !item.is_dec_digit()) +} + +/// Recognizes one or more ASCII numerical characters: 0-9 +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::digit1; +/// assert_eq!(digit1::<_, (_, ErrorKind)>("21c"), Ok(("c", "21"))); +/// assert_eq!(digit1::<_, (_, ErrorKind)>("c1"), Err(Err::Error(("c1", ErrorKind::Digit)))); +/// assert_eq!(digit1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1(|item| !item.is_dec_digit(), ErrorKind::Digit) +} + +/// Recognizes zero or more ASCII hexadecimal numerical characters: 0-9, A-F, a-f +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non hexadecimal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::hex_digit0; +/// assert_eq!(hex_digit0::<_, (_, ErrorKind)>("21cZ"), Ok(("Z", "21c"))); +/// assert_eq!(hex_digit0::<_, (_, ErrorKind)>("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(hex_digit0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn hex_digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position(|item| !item.is_hex_digit()) +} + +/// Recognizes one or more ASCII hexadecimal numerical characters: 0-9, A-F, a-f +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non hexadecimal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::hex_digit1; +/// assert_eq!(hex_digit1::<_, (_, ErrorKind)>("21cZ"), Ok(("Z", "21c"))); +/// assert_eq!(hex_digit1::<_, (_, ErrorKind)>("H2"), Err(Err::Error(("H2", ErrorKind::HexDigit)))); +/// assert_eq!(hex_digit1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn hex_digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1(|item| !item.is_hex_digit(), ErrorKind::HexDigit) +} + +/// Recognizes zero or more octal characters: 0-7 +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non octal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::oct_digit0; +/// assert_eq!(oct_digit0::<_, (_, ErrorKind)>("21cZ"), Ok(("cZ", "21"))); +/// assert_eq!(oct_digit0::<_, (_, ErrorKind)>("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(oct_digit0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn oct_digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position(|item| !item.is_oct_digit()) +} + +/// Recognizes one or more octal characters: 0-7 +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non octal digit character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::oct_digit1; +/// assert_eq!(oct_digit1::<_, (_, ErrorKind)>("21cZ"), Ok(("cZ", "21"))); +/// assert_eq!(oct_digit1::<_, (_, ErrorKind)>("H2"), Err(Err::Error(("H2", ErrorKind::OctDigit)))); +/// assert_eq!(oct_digit1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn oct_digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1(|item| !item.is_oct_digit(), ErrorKind::OctDigit) +} + +/// Recognizes zero or more ASCII numerical and alphabetic characters: 0-9, a-z, A-Z +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non alphanumerical character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::alphanumeric0; +/// assert_eq!(alphanumeric0::<_, (_, ErrorKind)>("21cZ%1"), Ok(("%1", "21cZ"))); +/// assert_eq!(alphanumeric0::<_, (_, ErrorKind)>("&Z21c"), Ok(("&Z21c", ""))); +/// assert_eq!(alphanumeric0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn alphanumeric0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position(|item| !item.is_alphanum()) +} + +/// Recognizes one or more ASCII numerical and alphabetic characters: 0-9, a-z, A-Z +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non alphanumerical character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::alphanumeric1; +/// assert_eq!(alphanumeric1::<_, (_, ErrorKind)>("21cZ%1"), Ok(("%1", "21cZ"))); +/// assert_eq!(alphanumeric1::<_, (_, ErrorKind)>("&H2"), Err(Err::Error(("&H2", ErrorKind::AlphaNumeric)))); +/// assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn alphanumeric1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + input.split_at_position1(|item| !item.is_alphanum(), ErrorKind::AlphaNumeric) +} + +/// Recognizes zero or more spaces and tabs. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::space0; +/// assert_eq!(space0::<_, (_, ErrorKind)>(" \t21c"), Ok(("21c", " \t"))); +/// assert_eq!(space0::<_, (_, ErrorKind)>("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(space0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn space0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position(|item| { + let c = item.as_char(); + !(c == ' ' || c == '\t') + }) +} +/// Recognizes one or more spaces and tabs. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::space1; +/// assert_eq!(space1::<_, (_, ErrorKind)>(" \t21c"), Ok(("21c", " \t"))); +/// assert_eq!(space1::<_, (_, ErrorKind)>("H2"), Err(Err::Error(("H2", ErrorKind::Space)))); +/// assert_eq!(space1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn space1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position1( + |item| { + let c = item.as_char(); + !(c == ' ' || c == '\t') + }, + ErrorKind::Space, + ) +} + +/// Recognizes zero or more spaces, tabs, carriage returns and line feeds. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::multispace0; +/// assert_eq!(multispace0::<_, (_, ErrorKind)>(" \t\n\r21c"), Ok(("21c", " \t\n\r"))); +/// assert_eq!(multispace0::<_, (_, ErrorKind)>("Z21c"), Ok(("Z21c", ""))); +/// assert_eq!(multispace0::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn multispace0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position(|item| { + let c = item.as_char(); + !(c == ' ' || c == '\t' || c == '\r' || c == '\n') + }) +} + +/// Recognizes one or more spaces, tabs, carriage returns and line feeds. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there's not enough input data, +/// or if no terminating token is found (a non space character). +/// # Example +/// +/// ``` +/// # use nom::{Err, error::ErrorKind, IResult, Needed}; +/// # use nom::character::streaming::multispace1; +/// assert_eq!(multispace1::<_, (_, ErrorKind)>(" \t\n\r21c"), Ok(("21c", " \t\n\r"))); +/// assert_eq!(multispace1::<_, (_, ErrorKind)>("H2"), Err(Err::Error(("H2", ErrorKind::MultiSpace)))); +/// assert_eq!(multispace1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +pub fn multispace1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar + Clone, +{ + input.split_at_position1( + |item| { + let c = item.as_char(); + !(c == ' ' || c == '\t' || c == '\r' || c == '\n') + }, + ErrorKind::MultiSpace, + ) +} + +pub(crate) fn sign<T, E: ParseError<T>>(input: T) -> IResult<T, bool, E> +where + T: Clone + InputTake + InputLength, + T: for<'a> Compare<&'a [u8]>, +{ + use crate::bytes::streaming::tag; + use crate::combinator::value; + + let (i, opt_sign) = opt(alt(( + value(false, tag(&b"-"[..])), + value(true, tag(&b"+"[..])), + )))(input)?; + let sign = opt_sign.unwrap_or(true); + + Ok((i, sign)) +} + +#[doc(hidden)] +macro_rules! ints { + ($($t:tt)+) => { + $( + /// will parse a number in text form to a number + /// + /// *Complete version*: can parse until the end of input. + pub fn $t<T, E: ParseError<T>>(input: T) -> IResult<T, $t, E> + where + T: InputIter + Slice<RangeFrom<usize>> + InputLength + InputTake + Clone, + <T as InputIter>::Item: AsChar, + T: for <'a> Compare<&'a[u8]>, + { + let (i, sign) = sign(input.clone())?; + + if i.input_len() == 0 { + return Err(Err::Incomplete(Needed::new(1))); + } + + let mut value: $t = 0; + if sign { + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_add(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + } else { + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_sub(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(input, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + } + + Err(Err::Incomplete(Needed::new(1))) + } + )+ + } +} + +ints! { i8 i16 i32 i64 i128 } + +#[doc(hidden)] +macro_rules! uints { + ($($t:tt)+) => { + $( + /// will parse a number in text form to a number + /// + /// *Complete version*: can parse until the end of input. + pub fn $t<T, E: ParseError<T>>(input: T) -> IResult<T, $t, E> + where + T: InputIter + Slice<RangeFrom<usize>> + InputLength, + <T as InputIter>::Item: AsChar, + { + let i = input; + + if i.input_len() == 0 { + return Err(Err::Incomplete(Needed::new(1))); + } + + let mut value: $t = 0; + for (pos, c) in i.iter_indices() { + match c.as_char().to_digit(10) { + None => { + if pos == 0 { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Digit))); + } else { + return Ok((i.slice(pos..), value)); + } + }, + Some(d) => match value.checked_mul(10).and_then(|v| v.checked_add(d as $t)) { + None => return Err(Err::Error(E::from_error_kind(i, ErrorKind::Digit))), + Some(v) => value = v, + } + } + } + + Err(Err::Incomplete(Needed::new(1))) + } + )+ + } +} + +uints! { u8 u16 u32 u64 u128 } + +#[cfg(test)] +mod tests { + use super::*; + use crate::error::ErrorKind; + use crate::internal::{Err, Needed}; + use crate::sequence::pair; + use crate::traits::ParseTo; + use proptest::prelude::*; + + macro_rules! assert_parse( + ($left: expr, $right: expr) => { + let res: $crate::IResult<_, _, (_, ErrorKind)> = $left; + assert_eq!(res, $right); + }; + ); + + #[test] + fn anychar_str() { + use super::anychar; + assert_eq!(anychar::<_, (&str, ErrorKind)>("Ә"), Ok(("", 'Ә'))); + } + + #[test] + fn character() { + let a: &[u8] = b"abcd"; + let b: &[u8] = b"1234"; + let c: &[u8] = b"a123"; + let d: &[u8] = "azé12".as_bytes(); + let e: &[u8] = b" "; + let f: &[u8] = b" ;"; + //assert_eq!(alpha1::<_, (_, ErrorKind)>(a), Err(Err::Incomplete(Needed::new(1)))); + assert_parse!(alpha1(a), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(alpha1(b), Err(Err::Error((b, ErrorKind::Alpha)))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(c), Ok((&c[1..], &b"a"[..]))); + assert_eq!( + alpha1::<_, (_, ErrorKind)>(d), + Ok(("é12".as_bytes(), &b"az"[..])) + ); + assert_eq!(digit1(a), Err(Err::Error((a, ErrorKind::Digit)))); + assert_eq!( + digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(digit1(c), Err(Err::Error((c, ErrorKind::Digit)))); + assert_eq!(digit1(d), Err(Err::Error((d, ErrorKind::Digit)))); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(a), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(c), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(d), + Ok(("zé12".as_bytes(), &b"a"[..])) + ); + assert_eq!(hex_digit1(e), Err(Err::Error((e, ErrorKind::HexDigit)))); + assert_eq!(oct_digit1(a), Err(Err::Error((a, ErrorKind::OctDigit)))); + assert_eq!( + oct_digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(oct_digit1(c), Err(Err::Error((c, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1(d), Err(Err::Error((d, ErrorKind::OctDigit)))); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(a), + Err(Err::Incomplete(Needed::new(1))) + ); + //assert_eq!(fix_error!(b,(), alphanumeric1), Ok((empty, b))); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(c), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(d), + Ok(("é12".as_bytes(), &b"az"[..])) + ); + assert_eq!( + space1::<_, (_, ErrorKind)>(e), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(space1::<_, (_, ErrorKind)>(f), Ok((&b";"[..], &b" "[..]))); + } + + #[cfg(feature = "alloc")] + #[test] + fn character_s() { + let a = "abcd"; + let b = "1234"; + let c = "a123"; + let d = "azé12"; + let e = " "; + assert_eq!( + alpha1::<_, (_, ErrorKind)>(a), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(alpha1(b), Err(Err::Error((b, ErrorKind::Alpha)))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(c), Ok((&c[1..], &"a"[..]))); + assert_eq!(alpha1::<_, (_, ErrorKind)>(d), Ok(("é12", &"az"[..]))); + assert_eq!(digit1(a), Err(Err::Error((a, ErrorKind::Digit)))); + assert_eq!( + digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(digit1(c), Err(Err::Error((c, ErrorKind::Digit)))); + assert_eq!(digit1(d), Err(Err::Error((d, ErrorKind::Digit)))); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(a), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + hex_digit1::<_, (_, ErrorKind)>(c), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(hex_digit1::<_, (_, ErrorKind)>(d), Ok(("zé12", &"a"[..]))); + assert_eq!(hex_digit1(e), Err(Err::Error((e, ErrorKind::HexDigit)))); + assert_eq!(oct_digit1(a), Err(Err::Error((a, ErrorKind::OctDigit)))); + assert_eq!( + oct_digit1::<_, (_, ErrorKind)>(b), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(oct_digit1(c), Err(Err::Error((c, ErrorKind::OctDigit)))); + assert_eq!(oct_digit1(d), Err(Err::Error((d, ErrorKind::OctDigit)))); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(a), + Err(Err::Incomplete(Needed::new(1))) + ); + //assert_eq!(fix_error!(b,(), alphanumeric1), Ok((empty, b))); + assert_eq!( + alphanumeric1::<_, (_, ErrorKind)>(c), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!(alphanumeric1::<_, (_, ErrorKind)>(d), Ok(("é12", "az"))); + assert_eq!( + space1::<_, (_, ErrorKind)>(e), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + use crate::traits::Offset; + #[test] + fn offset() { + let a = &b"abcd;"[..]; + let b = &b"1234;"[..]; + let c = &b"a123;"[..]; + let d = &b" \t;"[..]; + let e = &b" \t\r\n;"[..]; + let f = &b"123abcDEF;"[..]; + + match alpha1::<_, (_, ErrorKind)>(a) { + Ok((i, _)) => { + assert_eq!(a.offset(i) + i.len(), a.len()); + } + _ => panic!("wrong return type in offset test for alpha"), + } + match digit1::<_, (_, ErrorKind)>(b) { + Ok((i, _)) => { + assert_eq!(b.offset(i) + i.len(), b.len()); + } + _ => panic!("wrong return type in offset test for digit"), + } + match alphanumeric1::<_, (_, ErrorKind)>(c) { + Ok((i, _)) => { + assert_eq!(c.offset(i) + i.len(), c.len()); + } + _ => panic!("wrong return type in offset test for alphanumeric"), + } + match space1::<_, (_, ErrorKind)>(d) { + Ok((i, _)) => { + assert_eq!(d.offset(i) + i.len(), d.len()); + } + _ => panic!("wrong return type in offset test for space"), + } + match multispace1::<_, (_, ErrorKind)>(e) { + Ok((i, _)) => { + assert_eq!(e.offset(i) + i.len(), e.len()); + } + _ => panic!("wrong return type in offset test for multispace"), + } + match hex_digit1::<_, (_, ErrorKind)>(f) { + Ok((i, _)) => { + assert_eq!(f.offset(i) + i.len(), f.len()); + } + _ => panic!("wrong return type in offset test for hex_digit"), + } + match oct_digit1::<_, (_, ErrorKind)>(f) { + Ok((i, _)) => { + assert_eq!(f.offset(i) + i.len(), f.len()); + } + _ => panic!("wrong return type in offset test for oct_digit"), + } + } + + #[test] + fn is_not_line_ending_bytes() { + let a: &[u8] = b"ab12cd\nefgh"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(a), + Ok((&b"\nefgh"[..], &b"ab12cd"[..])) + ); + + let b: &[u8] = b"ab12cd\nefgh\nijkl"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(b), + Ok((&b"\nefgh\nijkl"[..], &b"ab12cd"[..])) + ); + + let c: &[u8] = b"ab12cd\r\nefgh\nijkl"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(c), + Ok((&b"\r\nefgh\nijkl"[..], &b"ab12cd"[..])) + ); + + let d: &[u8] = b"ab12cd"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(d), + Err(Err::Incomplete(Needed::Unknown)) + ); + } + + #[test] + fn is_not_line_ending_str() { + /* + let a: &str = "ab12cd\nefgh"; + assert_eq!(not_line_ending(a), Ok((&"\nefgh"[..], &"ab12cd"[..]))); + + let b: &str = "ab12cd\nefgh\nijkl"; + assert_eq!(not_line_ending(b), Ok((&"\nefgh\nijkl"[..], &"ab12cd"[..]))); + + let c: &str = "ab12cd\r\nefgh\nijkl"; + assert_eq!(not_line_ending(c), Ok((&"\r\nefgh\nijkl"[..], &"ab12cd"[..]))); + + let d = "βèƒôřè\nÂßÇáƒƭèř"; + assert_eq!(not_line_ending(d), Ok((&"\nÂßÇáƒƭèř"[..], &"βèƒôřè"[..]))); + + let e = "βèƒôřè\r\nÂßÇáƒƭèř"; + assert_eq!(not_line_ending(e), Ok((&"\r\nÂßÇáƒƭèř"[..], &"βèƒôřè"[..]))); + */ + + let f = "βèƒôřè\rÂßÇáƒƭèř"; + assert_eq!(not_line_ending(f), Err(Err::Error((f, ErrorKind::Tag)))); + + let g2: &str = "ab12cd"; + assert_eq!( + not_line_ending::<_, (_, ErrorKind)>(g2), + Err(Err::Incomplete(Needed::Unknown)) + ); + } + + #[test] + fn hex_digit_test() { + let i = &b"0123456789abcdefABCDEF;"[..]; + assert_parse!(hex_digit1(i), Ok((&b";"[..], &i[..i.len() - 1]))); + + let i = &b"g"[..]; + assert_parse!( + hex_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::HexDigit))) + ); + + let i = &b"G"[..]; + assert_parse!( + hex_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::HexDigit))) + ); + + assert!(crate::character::is_hex_digit(b'0')); + assert!(crate::character::is_hex_digit(b'9')); + assert!(crate::character::is_hex_digit(b'a')); + assert!(crate::character::is_hex_digit(b'f')); + assert!(crate::character::is_hex_digit(b'A')); + assert!(crate::character::is_hex_digit(b'F')); + assert!(!crate::character::is_hex_digit(b'g')); + assert!(!crate::character::is_hex_digit(b'G')); + assert!(!crate::character::is_hex_digit(b'/')); + assert!(!crate::character::is_hex_digit(b':')); + assert!(!crate::character::is_hex_digit(b'@')); + assert!(!crate::character::is_hex_digit(b'\x60')); + } + + #[test] + fn oct_digit_test() { + let i = &b"01234567;"[..]; + assert_parse!(oct_digit1(i), Ok((&b";"[..], &i[..i.len() - 1]))); + + let i = &b"8"[..]; + assert_parse!( + oct_digit1(i), + Err(Err::Error(error_position!(i, ErrorKind::OctDigit))) + ); + + assert!(crate::character::is_oct_digit(b'0')); + assert!(crate::character::is_oct_digit(b'7')); + assert!(!crate::character::is_oct_digit(b'8')); + assert!(!crate::character::is_oct_digit(b'9')); + assert!(!crate::character::is_oct_digit(b'a')); + assert!(!crate::character::is_oct_digit(b'A')); + assert!(!crate::character::is_oct_digit(b'/')); + assert!(!crate::character::is_oct_digit(b':')); + assert!(!crate::character::is_oct_digit(b'@')); + assert!(!crate::character::is_oct_digit(b'\x60')); + } + + #[test] + fn full_line_windows() { + fn take_full_line(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + pair(not_line_ending, line_ending)(i) + } + let input = b"abc\r\n"; + let output = take_full_line(input); + assert_eq!(output, Ok((&b""[..], (&b"abc"[..], &b"\r\n"[..])))); + } + + #[test] + fn full_line_unix() { + fn take_full_line(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + pair(not_line_ending, line_ending)(i) + } + let input = b"abc\n"; + let output = take_full_line(input); + assert_eq!(output, Ok((&b""[..], (&b"abc"[..], &b"\n"[..])))); + } + + #[test] + fn check_windows_lineending() { + let input = b"\r\n"; + let output = line_ending(&input[..]); + assert_parse!(output, Ok((&b""[..], &b"\r\n"[..]))); + } + + #[test] + fn check_unix_lineending() { + let input = b"\n"; + let output = line_ending(&input[..]); + assert_parse!(output, Ok((&b""[..], &b"\n"[..]))); + } + + #[test] + fn cr_lf() { + assert_parse!(crlf(&b"\r\na"[..]), Ok((&b"a"[..], &b"\r\n"[..]))); + assert_parse!(crlf(&b"\r"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!( + crlf(&b"\ra"[..]), + Err(Err::Error(error_position!(&b"\ra"[..], ErrorKind::CrLf))) + ); + + assert_parse!(crlf("\r\na"), Ok(("a", "\r\n"))); + assert_parse!(crlf("\r"), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!( + crlf("\ra"), + Err(Err::Error(error_position!("\ra", ErrorKind::CrLf))) + ); + } + + #[test] + fn end_of_line() { + assert_parse!(line_ending(&b"\na"[..]), Ok((&b"a"[..], &b"\n"[..]))); + assert_parse!(line_ending(&b"\r\na"[..]), Ok((&b"a"[..], &b"\r\n"[..]))); + assert_parse!( + line_ending(&b"\r"[..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_parse!( + line_ending(&b"\ra"[..]), + Err(Err::Error(error_position!(&b"\ra"[..], ErrorKind::CrLf))) + ); + + assert_parse!(line_ending("\na"), Ok(("a", "\n"))); + assert_parse!(line_ending("\r\na"), Ok(("a", "\r\n"))); + assert_parse!(line_ending("\r"), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!( + line_ending("\ra"), + Err(Err::Error(error_position!("\ra", ErrorKind::CrLf))) + ); + } + + fn digit_to_i16(input: &str) -> IResult<&str, i16> { + let i = input; + let (i, opt_sign) = opt(alt((char('+'), char('-'))))(i)?; + let sign = match opt_sign { + Some('+') => true, + Some('-') => false, + _ => true, + }; + + let (i, s) = match digit1::<_, crate::error::Error<_>>(i) { + Ok((i, s)) => (i, s), + Err(Err::Incomplete(i)) => return Err(Err::Incomplete(i)), + Err(_) => { + return Err(Err::Error(crate::error::Error::from_error_kind( + input, + ErrorKind::Digit, + ))) + } + }; + match s.parse_to() { + Some(n) => { + if sign { + Ok((i, n)) + } else { + Ok((i, -n)) + } + } + None => Err(Err::Error(crate::error::Error::from_error_kind( + i, + ErrorKind::Digit, + ))), + } + } + + fn digit_to_u32(i: &str) -> IResult<&str, u32> { + let (i, s) = digit1(i)?; + match s.parse_to() { + Some(n) => Ok((i, n)), + None => Err(Err::Error(crate::error::Error::from_error_kind( + i, + ErrorKind::Digit, + ))), + } + } + + proptest! { + #[test] + fn ints(s in "\\PC*") { + let res1 = digit_to_i16(&s); + let res2 = i16(s.as_str()); + assert_eq!(res1, res2); + } + + #[test] + fn uints(s in "\\PC*") { + let res1 = digit_to_u32(&s); + let res2 = u32(s.as_str()); + assert_eq!(res1, res2); + } + } +} diff --git a/third_party/rust/nom/src/character/tests.rs b/third_party/rust/nom/src/character/tests.rs new file mode 100644 index 0000000000..64c2a1c8a7 --- /dev/null +++ b/third_party/rust/nom/src/character/tests.rs @@ -0,0 +1,62 @@ +use super::streaming::*; +use crate::error::ErrorKind; +use crate::internal::{Err, IResult}; + +#[test] +fn one_of_test() { + fn f(i: &[u8]) -> IResult<&[u8], char> { + one_of("ab")(i) + } + + let a = &b"abcd"[..]; + assert_eq!(f(a), Ok((&b"bcd"[..], 'a'))); + + let b = &b"cde"[..]; + assert_eq!(f(b), Err(Err::Error(error_position!(b, ErrorKind::OneOf)))); + + fn utf8(i: &str) -> IResult<&str, char> { + one_of("+\u{FF0B}")(i) + } + + assert!(utf8("+").is_ok()); + assert!(utf8("\u{FF0B}").is_ok()); +} + +#[test] +fn none_of_test() { + fn f(i: &[u8]) -> IResult<&[u8], char> { + none_of("ab")(i) + } + + let a = &b"abcd"[..]; + assert_eq!(f(a), Err(Err::Error(error_position!(a, ErrorKind::NoneOf)))); + + let b = &b"cde"[..]; + assert_eq!(f(b), Ok((&b"de"[..], 'c'))); +} + +#[test] +fn char_byteslice() { + fn f(i: &[u8]) -> IResult<&[u8], char> { + char('c')(i) + } + + let a = &b"abcd"[..]; + assert_eq!(f(a), Err(Err::Error(error_position!(a, ErrorKind::Char)))); + + let b = &b"cde"[..]; + assert_eq!(f(b), Ok((&b"de"[..], 'c'))); +} + +#[test] +fn char_str() { + fn f(i: &str) -> IResult<&str, char> { + char('c')(i) + } + + let a = &"abcd"[..]; + assert_eq!(f(a), Err(Err::Error(error_position!(a, ErrorKind::Char)))); + + let b = &"cde"[..]; + assert_eq!(f(b), Ok((&"de"[..], 'c'))); +} diff --git a/third_party/rust/nom/src/combinator/mod.rs b/third_party/rust/nom/src/combinator/mod.rs new file mode 100644 index 0000000000..fe08d4a105 --- /dev/null +++ b/third_party/rust/nom/src/combinator/mod.rs @@ -0,0 +1,809 @@ +//! General purpose combinators + +#![allow(unused_imports)] + +#[cfg(feature = "alloc")] +use crate::lib::std::boxed::Box; + +use crate::error::{ErrorKind, FromExternalError, ParseError}; +use crate::internal::*; +use crate::lib::std::borrow::Borrow; +use crate::lib::std::convert::Into; +#[cfg(feature = "std")] +use crate::lib::std::fmt::Debug; +use crate::lib::std::mem::transmute; +use crate::lib::std::ops::{Range, RangeFrom, RangeTo}; +use crate::traits::{AsChar, InputIter, InputLength, InputTakeAtPosition, ParseTo}; +use crate::traits::{Compare, CompareResult, Offset, Slice}; + +#[cfg(test)] +mod tests; + +/// Return the remaining input. +/// +/// ```rust +/// # use nom::error::ErrorKind; +/// use nom::combinator::rest; +/// assert_eq!(rest::<_,(_, ErrorKind)>("abc"), Ok(("", "abc"))); +/// assert_eq!(rest::<_,(_, ErrorKind)>(""), Ok(("", ""))); +/// ``` +#[inline] +pub fn rest<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<RangeFrom<usize>>, + T: InputLength, +{ + Ok((input.slice(input.input_len()..), input)) +} + +/// Return the length of the remaining input. +/// +/// ```rust +/// # use nom::error::ErrorKind; +/// use nom::combinator::rest_len; +/// assert_eq!(rest_len::<_,(_, ErrorKind)>("abc"), Ok(("abc", 3))); +/// assert_eq!(rest_len::<_,(_, ErrorKind)>(""), Ok(("", 0))); +/// ``` +#[inline] +pub fn rest_len<T, E: ParseError<T>>(input: T) -> IResult<T, usize, E> +where + T: InputLength, +{ + let len = input.input_len(); + Ok((input, len)) +} + +/// Maps a function on the result of a parser. +/// +/// ```rust +/// use nom::{Err,error::ErrorKind, IResult,Parser}; +/// use nom::character::complete::digit1; +/// use nom::combinator::map; +/// # fn main() { +/// +/// let mut parser = map(digit1, |s: &str| s.len()); +/// +/// // the parser will count how many characters were returned by digit1 +/// assert_eq!(parser.parse("123456"), Ok(("", 6))); +/// +/// // this will fail if digit1 fails +/// assert_eq!(parser.parse("abc"), Err(Err::Error(("abc", ErrorKind::Digit)))); +/// # } +/// ``` +pub fn map<I, O1, O2, E, F, G>(mut parser: F, mut f: G) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: FnMut(O1) -> O2, +{ + move |input: I| { + let (input, o1) = parser.parse(input)?; + Ok((input, f(o1))) + } +} + +/// Applies a function returning a `Result` over the result of a parser. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::character::complete::digit1; +/// use nom::combinator::map_res; +/// # fn main() { +/// +/// let mut parse = map_res(digit1, |s: &str| s.parse::<u8>()); +/// +/// // the parser will convert the result of digit1 to a number +/// assert_eq!(parse("123"), Ok(("", 123))); +/// +/// // this will fail if digit1 fails +/// assert_eq!(parse("abc"), Err(Err::Error(("abc", ErrorKind::Digit)))); +/// +/// // this will fail if the mapped function fails (a `u8` is too small to hold `123456`) +/// assert_eq!(parse("123456"), Err(Err::Error(("123456", ErrorKind::MapRes)))); +/// # } +/// ``` +pub fn map_res<I: Clone, O1, O2, E: FromExternalError<I, E2>, E2, F, G>( + mut parser: F, + mut f: G, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: FnMut(O1) -> Result<O2, E2>, +{ + move |input: I| { + let i = input.clone(); + let (input, o1) = parser.parse(input)?; + match f(o1) { + Ok(o2) => Ok((input, o2)), + Err(e) => Err(Err::Error(E::from_external_error(i, ErrorKind::MapRes, e))), + } + } +} + +/// Applies a function returning an `Option` over the result of a parser. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::character::complete::digit1; +/// use nom::combinator::map_opt; +/// # fn main() { +/// +/// let mut parse = map_opt(digit1, |s: &str| s.parse::<u8>().ok()); +/// +/// // the parser will convert the result of digit1 to a number +/// assert_eq!(parse("123"), Ok(("", 123))); +/// +/// // this will fail if digit1 fails +/// assert_eq!(parse("abc"), Err(Err::Error(("abc", ErrorKind::Digit)))); +/// +/// // this will fail if the mapped function fails (a `u8` is too small to hold `123456`) +/// assert_eq!(parse("123456"), Err(Err::Error(("123456", ErrorKind::MapOpt)))); +/// # } +/// ``` +pub fn map_opt<I: Clone, O1, O2, E: ParseError<I>, F, G>( + mut parser: F, + mut f: G, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: FnMut(O1) -> Option<O2>, +{ + move |input: I| { + let i = input.clone(); + let (input, o1) = parser.parse(input)?; + match f(o1) { + Some(o2) => Ok((input, o2)), + None => Err(Err::Error(E::from_error_kind(i, ErrorKind::MapOpt))), + } + } +} + +/// Applies a parser over the result of another one. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::character::complete::digit1; +/// use nom::bytes::complete::take; +/// use nom::combinator::map_parser; +/// # fn main() { +/// +/// let mut parse = map_parser(take(5u8), digit1); +/// +/// assert_eq!(parse("12345"), Ok(("", "12345"))); +/// assert_eq!(parse("123ab"), Ok(("", "123"))); +/// assert_eq!(parse("123"), Err(Err::Error(("123", ErrorKind::Eof)))); +/// # } +/// ``` +pub fn map_parser<I, O1, O2, E: ParseError<I>, F, G>( + mut parser: F, + mut applied_parser: G, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: Parser<O1, O2, E>, +{ + move |input: I| { + let (input, o1) = parser.parse(input)?; + let (_, o2) = applied_parser.parse(o1)?; + Ok((input, o2)) + } +} + +/// Creates a new parser from the output of the first parser, then apply that parser over the rest of the input. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::bytes::complete::take; +/// use nom::number::complete::u8; +/// use nom::combinator::flat_map; +/// # fn main() { +/// +/// let mut parse = flat_map(u8, take); +/// +/// assert_eq!(parse(&[2, 0, 1, 2][..]), Ok((&[2][..], &[0, 1][..]))); +/// assert_eq!(parse(&[4, 0, 1, 2][..]), Err(Err::Error((&[0, 1, 2][..], ErrorKind::Eof)))); +/// # } +/// ``` +pub fn flat_map<I, O1, O2, E: ParseError<I>, F, G, H>( + mut parser: F, + mut applied_parser: G, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: FnMut(O1) -> H, + H: Parser<I, O2, E>, +{ + move |input: I| { + let (input, o1) = parser.parse(input)?; + applied_parser(o1).parse(input) + } +} + +/// Optional parser, will return `None` on [`Err::Error`]. +/// +/// To chain an error up, see [`cut`]. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::opt; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// fn parser(i: &str) -> IResult<&str, Option<&str>> { +/// opt(alpha1)(i) +/// } +/// +/// assert_eq!(parser("abcd;"), Ok((";", Some("abcd")))); +/// assert_eq!(parser("123;"), Ok(("123;", None))); +/// # } +/// ``` +pub fn opt<I: Clone, O, E: ParseError<I>, F>(mut f: F) -> impl FnMut(I) -> IResult<I, Option<O>, E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match f.parse(input) { + Ok((i, o)) => Ok((i, Some(o))), + Err(Err::Error(_)) => Ok((i, None)), + Err(e) => Err(e), + } + } +} + +/// Calls the parser if the condition is met. +/// +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, IResult}; +/// use nom::combinator::cond; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// fn parser(b: bool, i: &str) -> IResult<&str, Option<&str>> { +/// cond(b, alpha1)(i) +/// } +/// +/// assert_eq!(parser(true, "abcd;"), Ok((";", Some("abcd")))); +/// assert_eq!(parser(false, "abcd;"), Ok(("abcd;", None))); +/// assert_eq!(parser(true, "123;"), Err(Err::Error(Error::new("123;", ErrorKind::Alpha)))); +/// assert_eq!(parser(false, "123;"), Ok(("123;", None))); +/// # } +/// ``` +pub fn cond<I, O, E: ParseError<I>, F>( + b: bool, + mut f: F, +) -> impl FnMut(I) -> IResult<I, Option<O>, E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + if b { + match f.parse(input) { + Ok((i, o)) => Ok((i, Some(o))), + Err(e) => Err(e), + } + } else { + Ok((input, None)) + } + } +} + +/// Tries to apply its parser without consuming the input. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::peek; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// let mut parser = peek(alpha1); +/// +/// assert_eq!(parser("abcd;"), Ok(("abcd;", "abcd"))); +/// assert_eq!(parser("123;"), Err(Err::Error(("123;", ErrorKind::Alpha)))); +/// # } +/// ``` +pub fn peek<I: Clone, O, E: ParseError<I>, F>(mut f: F) -> impl FnMut(I) -> IResult<I, O, E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match f.parse(input) { + Ok((_, o)) => Ok((i, o)), + Err(e) => Err(e), + } + } +} + +/// returns its input if it is at the end of input data +/// +/// When we're at the end of the data, this combinator +/// will succeed +/// +/// ``` +/// # use std::str; +/// # use nom::{Err, error::ErrorKind, IResult}; +/// # use nom::combinator::eof; +/// +/// # fn main() { +/// let parser = eof; +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Eof)))); +/// assert_eq!(parser(""), Ok(("", ""))); +/// # } +/// ``` +pub fn eof<I: InputLength + Clone, E: ParseError<I>>(input: I) -> IResult<I, I, E> { + if input.input_len() == 0 { + let clone = input.clone(); + Ok((input, clone)) + } else { + Err(Err::Error(E::from_error_kind(input, ErrorKind::Eof))) + } +} + +/// Transforms Incomplete into `Error`. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::bytes::streaming::take; +/// use nom::combinator::complete; +/// # fn main() { +/// +/// let mut parser = complete(take(5u8)); +/// +/// assert_eq!(parser("abcdefg"), Ok(("fg", "abcde"))); +/// assert_eq!(parser("abcd"), Err(Err::Error(("abcd", ErrorKind::Complete)))); +/// # } +/// ``` +pub fn complete<I: Clone, O, E: ParseError<I>, F>(mut f: F) -> impl FnMut(I) -> IResult<I, O, E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match f.parse(input) { + Err(Err::Incomplete(_)) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Complete))), + rest => rest, + } + } +} + +/// Succeeds if all the input has been consumed by its child parser. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::all_consuming; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// let mut parser = all_consuming(alpha1); +/// +/// assert_eq!(parser("abcd"), Ok(("", "abcd"))); +/// assert_eq!(parser("abcd;"),Err(Err::Error((";", ErrorKind::Eof)))); +/// assert_eq!(parser("123abcd;"),Err(Err::Error(("123abcd;", ErrorKind::Alpha)))); +/// # } +/// ``` +pub fn all_consuming<I, O, E: ParseError<I>, F>(mut f: F) -> impl FnMut(I) -> IResult<I, O, E> +where + I: InputLength, + F: Parser<I, O, E>, +{ + move |input: I| { + let (input, res) = f.parse(input)?; + if input.input_len() == 0 { + Ok((input, res)) + } else { + Err(Err::Error(E::from_error_kind(input, ErrorKind::Eof))) + } + } +} + +/// Returns the result of the child parser if it satisfies a verification function. +/// +/// The verification function takes as argument a reference to the output of the +/// parser. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::verify; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// let mut parser = verify(alpha1, |s: &str| s.len() == 4); +/// +/// assert_eq!(parser("abcd"), Ok(("", "abcd"))); +/// assert_eq!(parser("abcde"), Err(Err::Error(("abcde", ErrorKind::Verify)))); +/// assert_eq!(parser("123abcd;"),Err(Err::Error(("123abcd;", ErrorKind::Alpha)))); +/// # } +/// ``` +pub fn verify<I: Clone, O1, O2, E: ParseError<I>, F, G>( + mut first: F, + second: G, +) -> impl FnMut(I) -> IResult<I, O1, E> +where + F: Parser<I, O1, E>, + G: Fn(&O2) -> bool, + O1: Borrow<O2>, + O2: ?Sized, +{ + move |input: I| { + let i = input.clone(); + let (input, o) = first.parse(input)?; + + if second(o.borrow()) { + Ok((input, o)) + } else { + Err(Err::Error(E::from_error_kind(i, ErrorKind::Verify))) + } + } +} + +/// Returns the provided value if the child parser succeeds. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::value; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// let mut parser = value(1234, alpha1); +/// +/// assert_eq!(parser("abcd"), Ok(("", 1234))); +/// assert_eq!(parser("123abcd;"), Err(Err::Error(("123abcd;", ErrorKind::Alpha)))); +/// # } +/// ``` +pub fn value<I, O1: Clone, O2, E: ParseError<I>, F>( + val: O1, + mut parser: F, +) -> impl FnMut(I) -> IResult<I, O1, E> +where + F: Parser<I, O2, E>, +{ + move |input: I| parser.parse(input).map(|(i, _)| (i, val.clone())) +} + +/// Succeeds if the child parser returns an error. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::not; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// let mut parser = not(alpha1); +/// +/// assert_eq!(parser("123"), Ok(("123", ()))); +/// assert_eq!(parser("abcd"), Err(Err::Error(("abcd", ErrorKind::Not)))); +/// # } +/// ``` +pub fn not<I: Clone, O, E: ParseError<I>, F>(mut parser: F) -> impl FnMut(I) -> IResult<I, (), E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match parser.parse(input) { + Ok(_) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Not))), + Err(Err::Error(_)) => Ok((i, ())), + Err(e) => Err(e), + } + } +} + +/// If the child parser was successful, return the consumed input as produced value. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::recognize; +/// use nom::character::complete::{char, alpha1}; +/// use nom::sequence::separated_pair; +/// # fn main() { +/// +/// let mut parser = recognize(separated_pair(alpha1, char(','), alpha1)); +/// +/// assert_eq!(parser("abcd,efgh"), Ok(("", "abcd,efgh"))); +/// assert_eq!(parser("abcd;"),Err(Err::Error((";", ErrorKind::Char)))); +/// # } +/// ``` +pub fn recognize<I: Clone + Offset + Slice<RangeTo<usize>>, O, E: ParseError<I>, F>( + mut parser: F, +) -> impl FnMut(I) -> IResult<I, I, E> +where + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match parser.parse(i) { + Ok((i, _)) => { + let index = input.offset(&i); + Ok((i, input.slice(..index))) + } + Err(e) => Err(e), + } + } +} + +/// if the child parser was successful, return the consumed input with the output +/// as a tuple. Functions similarly to [recognize](fn.recognize.html) except it +/// returns the parser output as well. +/// +/// This can be useful especially in cases where the output is not the same type +/// as the input, or the input is a user defined type. +/// +/// Returned tuple is of the format `(consumed input, produced output)`. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::combinator::{consumed, value, recognize, map}; +/// use nom::character::complete::{char, alpha1}; +/// use nom::bytes::complete::tag; +/// use nom::sequence::separated_pair; +/// +/// fn inner_parser(input: &str) -> IResult<&str, bool> { +/// value(true, tag("1234"))(input) +/// } +/// +/// # fn main() { +/// +/// let mut consumed_parser = consumed(value(true, separated_pair(alpha1, char(','), alpha1))); +/// +/// assert_eq!(consumed_parser("abcd,efgh1"), Ok(("1", ("abcd,efgh", true)))); +/// assert_eq!(consumed_parser("abcd;"),Err(Err::Error((";", ErrorKind::Char)))); +/// +/// +/// // the first output (representing the consumed input) +/// // should be the same as that of the `recognize` parser. +/// let mut recognize_parser = recognize(inner_parser); +/// let mut consumed_parser = map(consumed(inner_parser), |(consumed, output)| consumed); +/// +/// assert_eq!(recognize_parser("1234"), consumed_parser("1234")); +/// assert_eq!(recognize_parser("abcd"), consumed_parser("abcd")); +/// # } +/// ``` +pub fn consumed<I, O, F, E>(mut parser: F) -> impl FnMut(I) -> IResult<I, (I, O), E> +where + I: Clone + Offset + Slice<RangeTo<usize>>, + E: ParseError<I>, + F: Parser<I, O, E>, +{ + move |input: I| { + let i = input.clone(); + match parser.parse(i) { + Ok((remaining, result)) => { + let index = input.offset(&remaining); + let consumed = input.slice(..index); + Ok((remaining, (consumed, result))) + } + Err(e) => Err(e), + } + } +} + +/// Transforms an [`Err::Error`] (recoverable) to [`Err::Failure`] (unrecoverable) +/// +/// This commits the parse result, preventing alternative branch paths like with +/// [`nom::branch::alt`][crate::branch::alt]. +/// +/// # Example +/// +/// Without `cut`: +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// # use nom::character::complete::{one_of, digit1}; +/// # use nom::combinator::rest; +/// # use nom::branch::alt; +/// # use nom::sequence::preceded; +/// # fn main() { +/// +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alt(( +/// preceded(one_of("+-"), digit1), +/// rest +/// ))(input) +/// } +/// +/// assert_eq!(parser("+10 ab"), Ok((" ab", "10"))); +/// assert_eq!(parser("ab"), Ok(("", "ab"))); +/// assert_eq!(parser("+"), Ok(("", "+"))); +/// # } +/// ``` +/// +/// With `cut`: +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult, error::Error}; +/// # use nom::character::complete::{one_of, digit1}; +/// # use nom::combinator::rest; +/// # use nom::branch::alt; +/// # use nom::sequence::preceded; +/// use nom::combinator::cut; +/// # fn main() { +/// +/// fn parser(input: &str) -> IResult<&str, &str> { +/// alt(( +/// preceded(one_of("+-"), cut(digit1)), +/// rest +/// ))(input) +/// } +/// +/// assert_eq!(parser("+10 ab"), Ok((" ab", "10"))); +/// assert_eq!(parser("ab"), Ok(("", "ab"))); +/// assert_eq!(parser("+"), Err(Err::Failure(Error { input: "", code: ErrorKind::Digit }))); +/// # } +/// ``` +pub fn cut<I, O, E: ParseError<I>, F>(mut parser: F) -> impl FnMut(I) -> IResult<I, O, E> +where + F: Parser<I, O, E>, +{ + move |input: I| match parser.parse(input) { + Err(Err::Error(e)) => Err(Err::Failure(e)), + rest => rest, + } +} + +/// automatically converts the child parser's result to another type +/// +/// it will be able to convert the output value and the error value +/// as long as the `Into` implementations are available +/// +/// ```rust +/// # use nom::IResult; +/// use nom::combinator::into; +/// use nom::character::complete::alpha1; +/// # fn main() { +/// +/// fn parser1(i: &str) -> IResult<&str, &str> { +/// alpha1(i) +/// } +/// +/// let mut parser2 = into(parser1); +/// +/// // the parser converts the &str output of the child parser into a Vec<u8> +/// let bytes: IResult<&str, Vec<u8>> = parser2("abcd"); +/// assert_eq!(bytes, Ok(("", vec![97, 98, 99, 100]))); +/// # } +/// ``` +pub fn into<I, O1, O2, E1, E2, F>(mut parser: F) -> impl FnMut(I) -> IResult<I, O2, E2> +where + O1: Into<O2>, + E1: Into<E2>, + E1: ParseError<I>, + E2: ParseError<I>, + F: Parser<I, O1, E1>, +{ + //map(parser, Into::into) + move |input: I| match parser.parse(input) { + Ok((i, o)) => Ok((i, o.into())), + Err(Err::Error(e)) => Err(Err::Error(e.into())), + Err(Err::Failure(e)) => Err(Err::Failure(e.into())), + Err(Err::Incomplete(e)) => Err(Err::Incomplete(e)), + } +} + +/// Creates an iterator from input data and a parser. +/// +/// Call the iterator's [ParserIterator::finish] method to get the remaining input if successful, +/// or the error value if we encountered an error. +/// +/// On [`Err::Error`], iteration will stop. To instead chain an error up, see [`cut`]. +/// +/// ```rust +/// use nom::{combinator::iterator, IResult, bytes::complete::tag, character::complete::alpha1, sequence::terminated}; +/// use std::collections::HashMap; +/// +/// let data = "abc|defg|hijkl|mnopqr|123"; +/// let mut it = iterator(data, terminated(alpha1, tag("|"))); +/// +/// let parsed = it.map(|v| (v, v.len())).collect::<HashMap<_,_>>(); +/// let res: IResult<_,_> = it.finish(); +/// +/// assert_eq!(parsed, [("abc", 3usize), ("defg", 4), ("hijkl", 5), ("mnopqr", 6)].iter().cloned().collect()); +/// assert_eq!(res, Ok(("123", ()))); +/// ``` +pub fn iterator<Input, Output, Error, F>(input: Input, f: F) -> ParserIterator<Input, Error, F> +where + F: Parser<Input, Output, Error>, + Error: ParseError<Input>, +{ + ParserIterator { + iterator: f, + input, + state: Some(State::Running), + } +} + +/// Main structure associated to the [iterator] function. +pub struct ParserIterator<I, E, F> { + iterator: F, + input: I, + state: Option<State<E>>, +} + +impl<I: Clone, E, F> ParserIterator<I, E, F> { + /// Returns the remaining input if parsing was successful, or the error if we encountered an error. + pub fn finish(mut self) -> IResult<I, (), E> { + match self.state.take().unwrap() { + State::Running | State::Done => Ok((self.input, ())), + State::Failure(e) => Err(Err::Failure(e)), + State::Incomplete(i) => Err(Err::Incomplete(i)), + } + } +} + +impl<'a, Input, Output, Error, F> core::iter::Iterator for &'a mut ParserIterator<Input, Error, F> +where + F: FnMut(Input) -> IResult<Input, Output, Error>, + Input: Clone, +{ + type Item = Output; + + fn next(&mut self) -> Option<Self::Item> { + if let State::Running = self.state.take().unwrap() { + let input = self.input.clone(); + + match (self.iterator)(input) { + Ok((i, o)) => { + self.input = i; + self.state = Some(State::Running); + Some(o) + } + Err(Err::Error(_)) => { + self.state = Some(State::Done); + None + } + Err(Err::Failure(e)) => { + self.state = Some(State::Failure(e)); + None + } + Err(Err::Incomplete(i)) => { + self.state = Some(State::Incomplete(i)); + None + } + } + } else { + None + } + } +} + +enum State<E> { + Running, + Done, + Failure(E), + Incomplete(Needed), +} + +/// a parser which always succeeds with given value without consuming any input. +/// +/// It can be used for example as the last alternative in `alt` to +/// specify the default case. +/// +/// ```rust +/// # use nom::{Err,error::ErrorKind, IResult}; +/// use nom::branch::alt; +/// use nom::combinator::{success, value}; +/// use nom::character::complete::char; +/// # fn main() { +/// +/// let mut parser = success::<_,_,(_,ErrorKind)>(10); +/// assert_eq!(parser("xyz"), Ok(("xyz", 10))); +/// +/// let mut sign = alt((value(-1, char('-')), value(1, char('+')), success::<_,_,(_,ErrorKind)>(1))); +/// assert_eq!(sign("+10"), Ok(("10", 1))); +/// assert_eq!(sign("-10"), Ok(("10", -1))); +/// assert_eq!(sign("10"), Ok(("10", 1))); +/// # } +/// ``` +pub fn success<I, O: Clone, E: ParseError<I>>(val: O) -> impl Fn(I) -> IResult<I, O, E> { + move |input: I| Ok((input, val.clone())) +} + +/// A parser which always fails. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, IResult}; +/// use nom::combinator::fail; +/// +/// let s = "string"; +/// assert_eq!(fail::<_, &str, _>(s), Err(Err::Error((s, ErrorKind::Fail)))); +/// ``` +pub fn fail<I, O, E: ParseError<I>>(i: I) -> IResult<I, O, E> { + Err(Err::Error(E::from_error_kind(i, ErrorKind::Fail))) +} diff --git a/third_party/rust/nom/src/combinator/tests.rs b/third_party/rust/nom/src/combinator/tests.rs new file mode 100644 index 0000000000..15d32b8aae --- /dev/null +++ b/third_party/rust/nom/src/combinator/tests.rs @@ -0,0 +1,275 @@ +use super::*; +use crate::bytes::complete::take; +use crate::bytes::streaming::tag; +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Needed}; +#[cfg(feature = "alloc")] +use crate::lib::std::boxed::Box; +use crate::number::complete::u8; + +macro_rules! assert_parse( + ($left: expr, $right: expr) => { + let res: $crate::IResult<_, _, (_, ErrorKind)> = $left; + assert_eq!(res, $right); + }; +); + +/*#[test] +fn t1() { + let v1:Vec<u8> = vec![1,2,3]; + let v2:Vec<u8> = vec![4,5,6]; + let d = Ok((&v1[..], &v2[..])); + let res = d.flat_map(print); + assert_eq!(res, Ok((&v2[..], ()))); +}*/ + +#[test] +fn eof_on_slices() { + let not_over: &[u8] = &b"Hello, world!"[..]; + let is_over: &[u8] = &b""[..]; + + let res_not_over = eof(not_over); + assert_parse!( + res_not_over, + Err(Err::Error(error_position!(not_over, ErrorKind::Eof))) + ); + + let res_over = eof(is_over); + assert_parse!(res_over, Ok((is_over, is_over))); +} + +#[test] +fn eof_on_strs() { + let not_over: &str = "Hello, world!"; + let is_over: &str = ""; + + let res_not_over = eof(not_over); + assert_parse!( + res_not_over, + Err(Err::Error(error_position!(not_over, ErrorKind::Eof))) + ); + + let res_over = eof(is_over); + assert_parse!(res_over, Ok((is_over, is_over))); +} + +/* +#[test] +fn end_of_input() { + let not_over = &b"Hello, world!"[..]; + let is_over = &b""[..]; + named!(eof_test, eof!()); + + let res_not_over = eof_test(not_over); + assert_eq!(res_not_over, Err(Err::Error(error_position!(not_over, ErrorKind::Eof)))); + + let res_over = eof_test(is_over); + assert_eq!(res_over, Ok((is_over, is_over))); +} +*/ + +#[test] +fn rest_on_slices() { + let input: &[u8] = &b"Hello, world!"[..]; + let empty: &[u8] = &b""[..]; + assert_parse!(rest(input), Ok((empty, input))); +} + +#[test] +fn rest_on_strs() { + let input: &str = "Hello, world!"; + let empty: &str = ""; + assert_parse!(rest(input), Ok((empty, input))); +} + +#[test] +fn rest_len_on_slices() { + let input: &[u8] = &b"Hello, world!"[..]; + assert_parse!(rest_len(input), Ok((input, input.len()))); +} + +use crate::lib::std::convert::From; +impl From<u32> for CustomError { + fn from(_: u32) -> Self { + CustomError + } +} + +impl<I> ParseError<I> for CustomError { + fn from_error_kind(_: I, _: ErrorKind) -> Self { + CustomError + } + + fn append(_: I, _: ErrorKind, _: CustomError) -> Self { + CustomError + } +} + +struct CustomError; +#[allow(dead_code)] +fn custom_error(input: &[u8]) -> IResult<&[u8], &[u8], CustomError> { + //fix_error!(input, CustomError, alphanumeric) + crate::character::streaming::alphanumeric1(input) +} + +#[test] +fn test_flat_map() { + let input: &[u8] = &[3, 100, 101, 102, 103, 104][..]; + assert_parse!( + flat_map(u8, take)(input), + Ok((&[103, 104][..], &[100, 101, 102][..])) + ); +} + +#[test] +fn test_map_opt() { + let input: &[u8] = &[50][..]; + assert_parse!( + map_opt(u8, |u| if u < 20 { Some(u) } else { None })(input), + Err(Err::Error((&[50][..], ErrorKind::MapOpt))) + ); + assert_parse!( + map_opt(u8, |u| if u > 20 { Some(u) } else { None })(input), + Ok((&[][..], 50)) + ); +} + +#[test] +fn test_map_parser() { + let input: &[u8] = &[100, 101, 102, 103, 104][..]; + assert_parse!( + map_parser(take(4usize), take(2usize))(input), + Ok((&[104][..], &[100, 101][..])) + ); +} + +#[test] +fn test_all_consuming() { + let input: &[u8] = &[100, 101, 102][..]; + assert_parse!( + all_consuming(take(2usize))(input), + Err(Err::Error((&[102][..], ErrorKind::Eof))) + ); + assert_parse!( + all_consuming(take(3usize))(input), + Ok((&[][..], &[100, 101, 102][..])) + ); +} + +#[test] +#[allow(unused)] +fn test_verify_ref() { + use crate::bytes::complete::take; + + let mut parser1 = verify(take(3u8), |s: &[u8]| s == &b"abc"[..]); + + assert_eq!(parser1(&b"abcd"[..]), Ok((&b"d"[..], &b"abc"[..]))); + assert_eq!( + parser1(&b"defg"[..]), + Err(Err::Error((&b"defg"[..], ErrorKind::Verify))) + ); + + fn parser2(i: &[u8]) -> IResult<&[u8], u32> { + verify(crate::number::streaming::be_u32, |val: &u32| *val < 3)(i) + } +} + +#[test] +#[cfg(feature = "alloc")] +fn test_verify_alloc() { + use crate::bytes::complete::take; + let mut parser1 = verify(map(take(3u8), |s: &[u8]| s.to_vec()), |s: &[u8]| { + s == &b"abc"[..] + }); + + assert_eq!(parser1(&b"abcd"[..]), Ok((&b"d"[..], (&b"abc").to_vec()))); + assert_eq!( + parser1(&b"defg"[..]), + Err(Err::Error((&b"defg"[..], ErrorKind::Verify))) + ); +} + +#[test] +#[cfg(feature = "std")] +fn test_into() { + use crate::bytes::complete::take; + use crate::{ + error::{Error, ParseError}, + Err, + }; + + let mut parser = into(take::<_, _, Error<_>>(3u8)); + let result: IResult<&[u8], Vec<u8>> = parser(&b"abcdefg"[..]); + + assert_eq!(result, Ok((&b"defg"[..], vec![97, 98, 99]))); +} + +#[test] +fn opt_test() { + fn opt_abcd(i: &[u8]) -> IResult<&[u8], Option<&[u8]>> { + opt(tag("abcd"))(i) + } + + let a = &b"abcdef"[..]; + let b = &b"bcdefg"[..]; + let c = &b"ab"[..]; + assert_eq!(opt_abcd(a), Ok((&b"ef"[..], Some(&b"abcd"[..])))); + assert_eq!(opt_abcd(b), Ok((&b"bcdefg"[..], None))); + assert_eq!(opt_abcd(c), Err(Err::Incomplete(Needed::new(2)))); +} + +#[test] +fn peek_test() { + fn peek_tag(i: &[u8]) -> IResult<&[u8], &[u8]> { + peek(tag("abcd"))(i) + } + + assert_eq!(peek_tag(&b"abcdef"[..]), Ok((&b"abcdef"[..], &b"abcd"[..]))); + assert_eq!(peek_tag(&b"ab"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!( + peek_tag(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn not_test() { + fn not_aaa(i: &[u8]) -> IResult<&[u8], ()> { + not(tag("aaa"))(i) + } + + assert_eq!( + not_aaa(&b"aaa"[..]), + Err(Err::Error(error_position!(&b"aaa"[..], ErrorKind::Not))) + ); + assert_eq!(not_aaa(&b"aa"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(not_aaa(&b"abcd"[..]), Ok((&b"abcd"[..], ()))); +} + +#[test] +fn verify_test() { + use crate::bytes::streaming::take; + + fn test(i: &[u8]) -> IResult<&[u8], &[u8]> { + verify(take(5u8), |slice: &[u8]| slice[0] == b'a')(i) + } + assert_eq!(test(&b"bcd"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!( + test(&b"bcdefg"[..]), + Err(Err::Error(error_position!( + &b"bcdefg"[..], + ErrorKind::Verify + ))) + ); + assert_eq!(test(&b"abcdefg"[..]), Ok((&b"fg"[..], &b"abcde"[..]))); +} + +#[test] +fn fail_test() { + let a = "string"; + let b = "another string"; + + assert_eq!(fail::<_, &str, _>(a), Err(Err::Error((a, ErrorKind::Fail)))); + assert_eq!(fail::<_, &str, _>(b), Err(Err::Error((b, ErrorKind::Fail)))); +} diff --git a/third_party/rust/nom/src/error.rs b/third_party/rust/nom/src/error.rs new file mode 100644 index 0000000000..498b5e135a --- /dev/null +++ b/third_party/rust/nom/src/error.rs @@ -0,0 +1,831 @@ +//! Error management +//! +//! Parsers are generic over their error type, requiring that it implements +//! the `error::ParseError<Input>` trait. + +use crate::internal::Parser; +use crate::lib::std::fmt; + +/// This trait must be implemented by the error type of a nom parser. +/// +/// There are already implementations of it for `(Input, ErrorKind)` +/// and `VerboseError<Input>`. +/// +/// It provides methods to create an error from some combinators, +/// and combine existing errors in combinators like `alt`. +pub trait ParseError<I>: Sized { + /// Creates an error from the input position and an [ErrorKind] + fn from_error_kind(input: I, kind: ErrorKind) -> Self; + + /// Combines an existing error with a new one created from the input + /// position and an [ErrorKind]. This is useful when backtracking + /// through a parse tree, accumulating error context on the way + fn append(input: I, kind: ErrorKind, other: Self) -> Self; + + /// Creates an error from an input position and an expected character + fn from_char(input: I, _: char) -> Self { + Self::from_error_kind(input, ErrorKind::Char) + } + + /// Combines two existing errors. This function is used to compare errors + /// generated in various branches of `alt`. + fn or(self, other: Self) -> Self { + other + } +} + +/// This trait is required by the `context` combinator to add a static string +/// to an existing error +pub trait ContextError<I>: Sized { + /// Creates a new error from an input position, a static string and an existing error. + /// This is used mainly in the [context] combinator, to add user friendly information + /// to errors when backtracking through a parse tree + fn add_context(_input: I, _ctx: &'static str, other: Self) -> Self { + other + } +} + +/// This trait is required by the `map_res` combinator to integrate +/// error types from external functions, like [std::str::FromStr] +pub trait FromExternalError<I, E> { + /// Creates a new error from an input position, an [ErrorKind] indicating the + /// wrapping parser, and an external error + fn from_external_error(input: I, kind: ErrorKind, e: E) -> Self; +} + +/// default error type, only contains the error' location and code +#[derive(Debug, PartialEq)] +pub struct Error<I> { + /// position of the error in the input data + pub input: I, + /// nom error code + pub code: ErrorKind, +} + +impl<I> Error<I> { + /// creates a new basic error + pub fn new(input: I, code: ErrorKind) -> Error<I> { + Error { input, code } + } +} + +impl<I> ParseError<I> for Error<I> { + fn from_error_kind(input: I, kind: ErrorKind) -> Self { + Error { input, code: kind } + } + + fn append(_: I, _: ErrorKind, other: Self) -> Self { + other + } +} + +impl<I> ContextError<I> for Error<I> {} + +impl<I, E> FromExternalError<I, E> for Error<I> { + /// Create a new error from an input position and an external error + fn from_external_error(input: I, kind: ErrorKind, _e: E) -> Self { + Error { input, code: kind } + } +} + +/// The Display implementation allows the std::error::Error implementation +impl<I: fmt::Display> fmt::Display for Error<I> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "error {:?} at: {}", self.code, self.input) + } +} + +#[cfg(feature = "std")] +impl<I: fmt::Debug + fmt::Display> std::error::Error for Error<I> {} + +// for backward compatibility, keep those trait implementations +// for the previously used error type +impl<I> ParseError<I> for (I, ErrorKind) { + fn from_error_kind(input: I, kind: ErrorKind) -> Self { + (input, kind) + } + + fn append(_: I, _: ErrorKind, other: Self) -> Self { + other + } +} + +impl<I> ContextError<I> for (I, ErrorKind) {} + +impl<I, E> FromExternalError<I, E> for (I, ErrorKind) { + fn from_external_error(input: I, kind: ErrorKind, _e: E) -> Self { + (input, kind) + } +} + +impl<I> ParseError<I> for () { + fn from_error_kind(_: I, _: ErrorKind) -> Self {} + + fn append(_: I, _: ErrorKind, _: Self) -> Self {} +} + +impl<I> ContextError<I> for () {} + +impl<I, E> FromExternalError<I, E> for () { + fn from_external_error(_input: I, _kind: ErrorKind, _e: E) -> Self {} +} + +/// Creates an error from the input position and an [ErrorKind] +pub fn make_error<I, E: ParseError<I>>(input: I, kind: ErrorKind) -> E { + E::from_error_kind(input, kind) +} + +/// Combines an existing error with a new one created from the input +/// position and an [ErrorKind]. This is useful when backtracking +/// through a parse tree, accumulating error context on the way +pub fn append_error<I, E: ParseError<I>>(input: I, kind: ErrorKind, other: E) -> E { + E::append(input, kind, other) +} + +/// This error type accumulates errors and their position when backtracking +/// through a parse tree. With some post processing (cf `examples/json.rs`), +/// it can be used to display user friendly error messages +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +#[derive(Clone, Debug, PartialEq)] +pub struct VerboseError<I> { + /// List of errors accumulated by `VerboseError`, containing the affected + /// part of input data, and some context + pub errors: crate::lib::std::vec::Vec<(I, VerboseErrorKind)>, +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +#[derive(Clone, Debug, PartialEq)] +/// Error context for `VerboseError` +pub enum VerboseErrorKind { + /// Static string added by the `context` function + Context(&'static str), + /// Indicates which character was expected by the `char` function + Char(char), + /// Error kind given by various nom parsers + Nom(ErrorKind), +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +impl<I> ParseError<I> for VerboseError<I> { + fn from_error_kind(input: I, kind: ErrorKind) -> Self { + VerboseError { + errors: vec![(input, VerboseErrorKind::Nom(kind))], + } + } + + fn append(input: I, kind: ErrorKind, mut other: Self) -> Self { + other.errors.push((input, VerboseErrorKind::Nom(kind))); + other + } + + fn from_char(input: I, c: char) -> Self { + VerboseError { + errors: vec![(input, VerboseErrorKind::Char(c))], + } + } +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +impl<I> ContextError<I> for VerboseError<I> { + fn add_context(input: I, ctx: &'static str, mut other: Self) -> Self { + other.errors.push((input, VerboseErrorKind::Context(ctx))); + other + } +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +impl<I, E> FromExternalError<I, E> for VerboseError<I> { + /// Create a new error from an input position and an external error + fn from_external_error(input: I, kind: ErrorKind, _e: E) -> Self { + Self::from_error_kind(input, kind) + } +} + +#[cfg(feature = "alloc")] +impl<I: fmt::Display> fmt::Display for VerboseError<I> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + writeln!(f, "Parse error:")?; + for (input, error) in &self.errors { + match error { + VerboseErrorKind::Nom(e) => writeln!(f, "{:?} at: {}", e, input)?, + VerboseErrorKind::Char(c) => writeln!(f, "expected '{}' at: {}", c, input)?, + VerboseErrorKind::Context(s) => writeln!(f, "in section '{}', at: {}", s, input)?, + } + } + + Ok(()) + } +} + +#[cfg(feature = "std")] +impl<I: fmt::Debug + fmt::Display> std::error::Error for VerboseError<I> {} + +use crate::internal::{Err, IResult}; + +/// Create a new error from an input position, a static string and an existing error. +/// This is used mainly in the [context] combinator, to add user friendly information +/// to errors when backtracking through a parse tree +pub fn context<I: Clone, E: ContextError<I>, F, O>( + context: &'static str, + mut f: F, +) -> impl FnMut(I) -> IResult<I, O, E> +where + F: Parser<I, O, E>, +{ + move |i: I| match f.parse(i.clone()) { + Ok(o) => Ok(o), + Err(Err::Incomplete(i)) => Err(Err::Incomplete(i)), + Err(Err::Error(e)) => Err(Err::Error(E::add_context(i, context, e))), + Err(Err::Failure(e)) => Err(Err::Failure(E::add_context(i, context, e))), + } +} + +/// Transforms a `VerboseError` into a trace with input position information +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn convert_error<I: core::ops::Deref<Target = str>>( + input: I, + e: VerboseError<I>, +) -> crate::lib::std::string::String { + use crate::lib::std::fmt::Write; + use crate::traits::Offset; + + let mut result = crate::lib::std::string::String::new(); + + for (i, (substring, kind)) in e.errors.iter().enumerate() { + let offset = input.offset(substring); + + if input.is_empty() { + match kind { + VerboseErrorKind::Char(c) => { + write!(&mut result, "{}: expected '{}', got empty input\n\n", i, c) + } + VerboseErrorKind::Context(s) => write!(&mut result, "{}: in {}, got empty input\n\n", i, s), + VerboseErrorKind::Nom(e) => write!(&mut result, "{}: in {:?}, got empty input\n\n", i, e), + } + } else { + let prefix = &input.as_bytes()[..offset]; + + // Count the number of newlines in the first `offset` bytes of input + let line_number = prefix.iter().filter(|&&b| b == b'\n').count() + 1; + + // Find the line that includes the subslice: + // Find the *last* newline before the substring starts + let line_begin = prefix + .iter() + .rev() + .position(|&b| b == b'\n') + .map(|pos| offset - pos) + .unwrap_or(0); + + // Find the full line after that newline + let line = input[line_begin..] + .lines() + .next() + .unwrap_or(&input[line_begin..]) + .trim_end(); + + // The (1-indexed) column number is the offset of our substring into that line + let column_number = line.offset(substring) + 1; + + match kind { + VerboseErrorKind::Char(c) => { + if let Some(actual) = substring.chars().next() { + write!( + &mut result, + "{i}: at line {line_number}:\n\ + {line}\n\ + {caret:>column$}\n\ + expected '{expected}', found {actual}\n\n", + i = i, + line_number = line_number, + line = line, + caret = '^', + column = column_number, + expected = c, + actual = actual, + ) + } else { + write!( + &mut result, + "{i}: at line {line_number}:\n\ + {line}\n\ + {caret:>column$}\n\ + expected '{expected}', got end of input\n\n", + i = i, + line_number = line_number, + line = line, + caret = '^', + column = column_number, + expected = c, + ) + } + } + VerboseErrorKind::Context(s) => write!( + &mut result, + "{i}: at line {line_number}, in {context}:\n\ + {line}\n\ + {caret:>column$}\n\n", + i = i, + line_number = line_number, + context = s, + line = line, + caret = '^', + column = column_number, + ), + VerboseErrorKind::Nom(e) => write!( + &mut result, + "{i}: at line {line_number}, in {nom_err:?}:\n\ + {line}\n\ + {caret:>column$}\n\n", + i = i, + line_number = line_number, + nom_err = e, + line = line, + caret = '^', + column = column_number, + ), + } + } + // Because `write!` to a `String` is infallible, this `unwrap` is fine. + .unwrap(); + } + + result +} + +/// Indicates which parser returned an error +#[rustfmt::skip] +#[derive(Debug,PartialEq,Eq,Hash,Clone,Copy)] +#[allow(deprecated,missing_docs)] +pub enum ErrorKind { + Tag, + MapRes, + MapOpt, + Alt, + IsNot, + IsA, + SeparatedList, + SeparatedNonEmptyList, + Many0, + Many1, + ManyTill, + Count, + TakeUntil, + LengthValue, + TagClosure, + Alpha, + Digit, + HexDigit, + OctDigit, + AlphaNumeric, + Space, + MultiSpace, + LengthValueFn, + Eof, + Switch, + TagBits, + OneOf, + NoneOf, + Char, + CrLf, + RegexpMatch, + RegexpMatches, + RegexpFind, + RegexpCapture, + RegexpCaptures, + TakeWhile1, + Complete, + Fix, + Escaped, + EscapedTransform, + NonEmpty, + ManyMN, + Not, + Permutation, + Verify, + TakeTill1, + TakeWhileMN, + TooLarge, + Many0Count, + Many1Count, + Float, + Satisfy, + Fail, +} + +#[rustfmt::skip] +#[allow(deprecated)] +/// Converts an ErrorKind to a number +pub fn error_to_u32(e: &ErrorKind) -> u32 { + match *e { + ErrorKind::Tag => 1, + ErrorKind::MapRes => 2, + ErrorKind::MapOpt => 3, + ErrorKind::Alt => 4, + ErrorKind::IsNot => 5, + ErrorKind::IsA => 6, + ErrorKind::SeparatedList => 7, + ErrorKind::SeparatedNonEmptyList => 8, + ErrorKind::Many1 => 9, + ErrorKind::Count => 10, + ErrorKind::TakeUntil => 12, + ErrorKind::LengthValue => 15, + ErrorKind::TagClosure => 16, + ErrorKind::Alpha => 17, + ErrorKind::Digit => 18, + ErrorKind::AlphaNumeric => 19, + ErrorKind::Space => 20, + ErrorKind::MultiSpace => 21, + ErrorKind::LengthValueFn => 22, + ErrorKind::Eof => 23, + ErrorKind::Switch => 27, + ErrorKind::TagBits => 28, + ErrorKind::OneOf => 29, + ErrorKind::NoneOf => 30, + ErrorKind::Char => 40, + ErrorKind::CrLf => 41, + ErrorKind::RegexpMatch => 42, + ErrorKind::RegexpMatches => 43, + ErrorKind::RegexpFind => 44, + ErrorKind::RegexpCapture => 45, + ErrorKind::RegexpCaptures => 46, + ErrorKind::TakeWhile1 => 47, + ErrorKind::Complete => 48, + ErrorKind::Fix => 49, + ErrorKind::Escaped => 50, + ErrorKind::EscapedTransform => 51, + ErrorKind::NonEmpty => 56, + ErrorKind::ManyMN => 57, + ErrorKind::HexDigit => 59, + ErrorKind::OctDigit => 61, + ErrorKind::Many0 => 62, + ErrorKind::Not => 63, + ErrorKind::Permutation => 64, + ErrorKind::ManyTill => 65, + ErrorKind::Verify => 66, + ErrorKind::TakeTill1 => 67, + ErrorKind::TakeWhileMN => 69, + ErrorKind::TooLarge => 70, + ErrorKind::Many0Count => 71, + ErrorKind::Many1Count => 72, + ErrorKind::Float => 73, + ErrorKind::Satisfy => 74, + ErrorKind::Fail => 75, + } +} + +impl ErrorKind { + #[rustfmt::skip] + #[allow(deprecated)] + /// Converts an ErrorKind to a text description + pub fn description(&self) -> &str { + match *self { + ErrorKind::Tag => "Tag", + ErrorKind::MapRes => "Map on Result", + ErrorKind::MapOpt => "Map on Option", + ErrorKind::Alt => "Alternative", + ErrorKind::IsNot => "IsNot", + ErrorKind::IsA => "IsA", + ErrorKind::SeparatedList => "Separated list", + ErrorKind::SeparatedNonEmptyList => "Separated non empty list", + ErrorKind::Many0 => "Many0", + ErrorKind::Many1 => "Many1", + ErrorKind::Count => "Count", + ErrorKind::TakeUntil => "Take until", + ErrorKind::LengthValue => "Length followed by value", + ErrorKind::TagClosure => "Tag closure", + ErrorKind::Alpha => "Alphabetic", + ErrorKind::Digit => "Digit", + ErrorKind::AlphaNumeric => "AlphaNumeric", + ErrorKind::Space => "Space", + ErrorKind::MultiSpace => "Multiple spaces", + ErrorKind::LengthValueFn => "LengthValueFn", + ErrorKind::Eof => "End of file", + ErrorKind::Switch => "Switch", + ErrorKind::TagBits => "Tag on bitstream", + ErrorKind::OneOf => "OneOf", + ErrorKind::NoneOf => "NoneOf", + ErrorKind::Char => "Char", + ErrorKind::CrLf => "CrLf", + ErrorKind::RegexpMatch => "RegexpMatch", + ErrorKind::RegexpMatches => "RegexpMatches", + ErrorKind::RegexpFind => "RegexpFind", + ErrorKind::RegexpCapture => "RegexpCapture", + ErrorKind::RegexpCaptures => "RegexpCaptures", + ErrorKind::TakeWhile1 => "TakeWhile1", + ErrorKind::Complete => "Complete", + ErrorKind::Fix => "Fix", + ErrorKind::Escaped => "Escaped", + ErrorKind::EscapedTransform => "EscapedTransform", + ErrorKind::NonEmpty => "NonEmpty", + ErrorKind::ManyMN => "Many(m, n)", + ErrorKind::HexDigit => "Hexadecimal Digit", + ErrorKind::OctDigit => "Octal digit", + ErrorKind::Not => "Negation", + ErrorKind::Permutation => "Permutation", + ErrorKind::ManyTill => "ManyTill", + ErrorKind::Verify => "predicate verification", + ErrorKind::TakeTill1 => "TakeTill1", + ErrorKind::TakeWhileMN => "TakeWhileMN", + ErrorKind::TooLarge => "Needed data size is too large", + ErrorKind::Many0Count => "Count occurrence of >=0 patterns", + ErrorKind::Many1Count => "Count occurrence of >=1 patterns", + ErrorKind::Float => "Float", + ErrorKind::Satisfy => "Satisfy", + ErrorKind::Fail => "Fail", + } + } +} + +/// Creates a parse error from a `nom::ErrorKind` +/// and the position in the input +#[allow(unused_variables)] +#[macro_export(local_inner_macros)] +macro_rules! error_position( + ($input:expr, $code:expr) => ({ + $crate::error::make_error($input, $code) + }); +); + +/// Creates a parse error from a `nom::ErrorKind`, +/// the position in the input and the next error in +/// the parsing tree +#[allow(unused_variables)] +#[macro_export(local_inner_macros)] +macro_rules! error_node_position( + ($input:expr, $code:expr, $next:expr) => ({ + $crate::error::append_error($input, $code, $next) + }); +); + +/// Prints a message and the input if the parser fails. +/// +/// The message prints the `Error` or `Incomplete` +/// and the parser's calling code. +/// +/// It also displays the input in hexdump format +/// +/// ```rust +/// use nom::{IResult, error::dbg_dmp, bytes::complete::tag}; +/// +/// fn f(i: &[u8]) -> IResult<&[u8], &[u8]> { +/// dbg_dmp(tag("abcd"), "tag")(i) +/// } +/// +/// let a = &b"efghijkl"[..]; +/// +/// // Will print the following message: +/// // Error(Position(0, [101, 102, 103, 104, 105, 106, 107, 108])) at l.5 by ' tag ! ( "abcd" ) ' +/// // 00000000 65 66 67 68 69 6a 6b 6c efghijkl +/// f(a); +/// ``` +#[cfg(feature = "std")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "std")))] +pub fn dbg_dmp<'a, F, O, E: std::fmt::Debug>( + f: F, + context: &'static str, +) -> impl Fn(&'a [u8]) -> IResult<&'a [u8], O, E> +where + F: Fn(&'a [u8]) -> IResult<&'a [u8], O, E>, +{ + use crate::HexDisplay; + move |i: &'a [u8]| match f(i) { + Err(e) => { + println!("{}: Error({:?}) at:\n{}", context, e, i.to_hex(8)); + Err(e) + } + a => a, + } +} + +#[cfg(test)] +#[cfg(feature = "alloc")] +mod tests { + use super::*; + use crate::character::complete::char; + + #[test] + fn convert_error_panic() { + let input = ""; + + let _result: IResult<_, _, VerboseError<&str>> = char('x')(input); + } +} + +/* +#[cfg(feature = "alloc")] +use lib::std::{vec::Vec, collections::HashMap}; + +#[cfg(feature = "std")] +use lib::std::hash::Hash; + +#[cfg(feature = "std")] +pub fn add_error_pattern<'a, I: Clone + Hash + Eq, O, E: Clone + Hash + Eq>( + h: &mut HashMap<VerboseError<I>, &'a str>, + e: VerboseError<I>, + message: &'a str, +) -> bool { + h.insert(e, message); + true +} + +pub fn slice_to_offsets(input: &[u8], s: &[u8]) -> (usize, usize) { + let start = input.as_ptr(); + let off1 = s.as_ptr() as usize - start as usize; + let off2 = off1 + s.len(); + (off1, off2) +} + +#[cfg(feature = "std")] +pub fn prepare_errors<O, E: Clone>(input: &[u8], e: VerboseError<&[u8]>) -> Option<Vec<(ErrorKind, usize, usize)>> { + let mut v: Vec<(ErrorKind, usize, usize)> = Vec::new(); + + for (p, kind) in e.errors.drain(..) { + let (o1, o2) = slice_to_offsets(input, p); + v.push((kind, o1, o2)); + } + + v.reverse(); + Some(v) +} + +#[cfg(feature = "std")] +pub fn print_error<O, E: Clone>(input: &[u8], res: VerboseError<&[u8]>) { + if let Some(v) = prepare_errors(input, res) { + let colors = generate_colors(&v); + println!("parser codes: {}", print_codes(&colors, &HashMap::new())); + println!("{}", print_offsets(input, 0, &v)); + } else { + println!("not an error"); + } +} + +#[cfg(feature = "std")] +pub fn generate_colors<E>(v: &[(ErrorKind, usize, usize)]) -> HashMap<u32, u8> { + let mut h: HashMap<u32, u8> = HashMap::new(); + let mut color = 0; + + for &(ref c, _, _) in v.iter() { + h.insert(error_to_u32(c), color + 31); + color = color + 1 % 7; + } + + h +} + +pub fn code_from_offset(v: &[(ErrorKind, usize, usize)], offset: usize) -> Option<u32> { + let mut acc: Option<(u32, usize, usize)> = None; + for &(ref ek, s, e) in v.iter() { + let c = error_to_u32(ek); + if s <= offset && offset <= e { + if let Some((_, start, end)) = acc { + if start <= s && e <= end { + acc = Some((c, s, e)); + } + } else { + acc = Some((c, s, e)); + } + } + } + if let Some((code, _, _)) = acc { + return Some(code); + } else { + return None; + } +} + +#[cfg(feature = "alloc")] +pub fn reset_color(v: &mut Vec<u8>) { + v.push(0x1B); + v.push(b'['); + v.push(0); + v.push(b'm'); +} + +#[cfg(feature = "alloc")] +pub fn write_color(v: &mut Vec<u8>, color: u8) { + v.push(0x1B); + v.push(b'['); + v.push(1); + v.push(b';'); + let s = color.to_string(); + let bytes = s.as_bytes(); + v.extend(bytes.iter().cloned()); + v.push(b'm'); +} + +#[cfg(feature = "std")] +#[cfg_attr(feature = "cargo-clippy", allow(implicit_hasher))] +pub fn print_codes(colors: &HashMap<u32, u8>, names: &HashMap<u32, &str>) -> String { + let mut v = Vec::new(); + for (code, &color) in colors { + if let Some(&s) = names.get(code) { + let bytes = s.as_bytes(); + write_color(&mut v, color); + v.extend(bytes.iter().cloned()); + } else { + let s = code.to_string(); + let bytes = s.as_bytes(); + write_color(&mut v, color); + v.extend(bytes.iter().cloned()); + } + reset_color(&mut v); + v.push(b' '); + } + reset_color(&mut v); + + String::from_utf8_lossy(&v[..]).into_owned() +} + +#[cfg(feature = "std")] +pub fn print_offsets(input: &[u8], from: usize, offsets: &[(ErrorKind, usize, usize)]) -> String { + let mut v = Vec::with_capacity(input.len() * 3); + let mut i = from; + let chunk_size = 8; + let mut current_code: Option<u32> = None; + let mut current_code2: Option<u32> = None; + + let colors = generate_colors(&offsets); + + for chunk in input.chunks(chunk_size) { + let s = format!("{:08x}", i); + for &ch in s.as_bytes().iter() { + v.push(ch); + } + v.push(b'\t'); + + let mut k = i; + let mut l = i; + for &byte in chunk { + if let Some(code) = code_from_offset(&offsets, k) { + if let Some(current) = current_code { + if current != code { + reset_color(&mut v); + current_code = Some(code); + if let Some(&color) = colors.get(&code) { + write_color(&mut v, color); + } + } + } else { + current_code = Some(code); + if let Some(&color) = colors.get(&code) { + write_color(&mut v, color); + } + } + } + v.push(CHARS[(byte >> 4) as usize]); + v.push(CHARS[(byte & 0xf) as usize]); + v.push(b' '); + k = k + 1; + } + + reset_color(&mut v); + + if chunk_size > chunk.len() { + for _ in 0..(chunk_size - chunk.len()) { + v.push(b' '); + v.push(b' '); + v.push(b' '); + } + } + v.push(b'\t'); + + for &byte in chunk { + if let Some(code) = code_from_offset(&offsets, l) { + if let Some(current) = current_code2 { + if current != code { + reset_color(&mut v); + current_code2 = Some(code); + if let Some(&color) = colors.get(&code) { + write_color(&mut v, color); + } + } + } else { + current_code2 = Some(code); + if let Some(&color) = colors.get(&code) { + write_color(&mut v, color); + } + } + } + if (byte >= 32 && byte <= 126) || byte >= 128 { + v.push(byte); + } else { + v.push(b'.'); + } + l = l + 1; + } + reset_color(&mut v); + + v.push(b'\n'); + i = i + chunk_size; + } + + String::from_utf8_lossy(&v[..]).into_owned() +} +*/ diff --git a/third_party/rust/nom/src/internal.rs b/third_party/rust/nom/src/internal.rs new file mode 100644 index 0000000000..b7572fbd0a --- /dev/null +++ b/third_party/rust/nom/src/internal.rs @@ -0,0 +1,489 @@ +//! Basic types to build the parsers + +use self::Needed::*; +use crate::error::{self, ErrorKind}; +use crate::lib::std::fmt; +use core::num::NonZeroUsize; + +/// Holds the result of parsing functions +/// +/// It depends on the input type `I`, the output type `O`, and the error type `E` +/// (by default `(I, nom::ErrorKind)`) +/// +/// The `Ok` side is a pair containing the remainder of the input (the part of the data that +/// was not parsed) and the produced value. The `Err` side contains an instance of `nom::Err`. +/// +/// Outside of the parsing code, you can use the [Finish::finish] method to convert +/// it to a more common result type +pub type IResult<I, O, E = error::Error<I>> = Result<(I, O), Err<E>>; + +/// Helper trait to convert a parser's result to a more manageable type +pub trait Finish<I, O, E> { + /// converts the parser's result to a type that is more consumable by error + /// management libraries. It keeps the same `Ok` branch, and merges `Err::Error` + /// and `Err::Failure` into the `Err` side. + /// + /// *warning*: if the result is `Err(Err::Incomplete(_))`, this method will panic. + /// - "complete" parsers: It will not be an issue, `Incomplete` is never used + /// - "streaming" parsers: `Incomplete` will be returned if there's not enough data + /// for the parser to decide, and you should gather more data before parsing again. + /// Once the parser returns either `Ok(_)`, `Err(Err::Error(_))` or `Err(Err::Failure(_))`, + /// you can get out of the parsing loop and call `finish()` on the parser's result + fn finish(self) -> Result<(I, O), E>; +} + +impl<I, O, E> Finish<I, O, E> for IResult<I, O, E> { + fn finish(self) -> Result<(I, O), E> { + match self { + Ok(res) => Ok(res), + Err(Err::Error(e)) | Err(Err::Failure(e)) => Err(e), + Err(Err::Incomplete(_)) => { + panic!("Cannot call `finish()` on `Err(Err::Incomplete(_))`: this result means that the parser does not have enough data to decide, you should gather more data and try to reapply the parser instead") + } + } + } +} + +/// Contains information on needed data if a parser returned `Incomplete` +#[derive(Debug, PartialEq, Eq, Clone, Copy)] +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub enum Needed { + /// Needs more data, but we do not know how much + Unknown, + /// Contains the required data size in bytes + Size(NonZeroUsize), +} + +impl Needed { + /// Creates `Needed` instance, returns `Needed::Unknown` if the argument is zero + pub fn new(s: usize) -> Self { + match NonZeroUsize::new(s) { + Some(sz) => Needed::Size(sz), + None => Needed::Unknown, + } + } + + /// Indicates if we know how many bytes we need + pub fn is_known(&self) -> bool { + *self != Unknown + } + + /// Maps a `Needed` to `Needed` by applying a function to a contained `Size` value. + #[inline] + pub fn map<F: Fn(NonZeroUsize) -> usize>(self, f: F) -> Needed { + match self { + Unknown => Unknown, + Size(n) => Needed::new(f(n)), + } + } +} + +/// The `Err` enum indicates the parser was not successful +/// +/// It has three cases: +/// +/// * `Incomplete` indicates that more data is needed to decide. The `Needed` enum +/// can contain how many additional bytes are necessary. If you are sure your parser +/// is working on full data, you can wrap your parser with the `complete` combinator +/// to transform that case in `Error` +/// * `Error` means some parser did not succeed, but another one might (as an example, +/// when testing different branches of an `alt` combinator) +/// * `Failure` indicates an unrecoverable error. As an example, if you recognize a prefix +/// to decide on the next parser to apply, and that parser fails, you know there's no need +/// to try other parsers, you were already in the right branch, so the data is invalid +/// +#[derive(Debug, Clone, PartialEq)] +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub enum Err<E> { + /// There was not enough data + Incomplete(Needed), + /// The parser had an error (recoverable) + Error(E), + /// The parser had an unrecoverable error: we got to the right + /// branch and we know other branches won't work, so backtrack + /// as fast as possible + Failure(E), +} + +impl<E> Err<E> { + /// Tests if the result is Incomplete + pub fn is_incomplete(&self) -> bool { + if let Err::Incomplete(_) = self { + true + } else { + false + } + } + + /// Applies the given function to the inner error + pub fn map<E2, F>(self, f: F) -> Err<E2> + where + F: FnOnce(E) -> E2, + { + match self { + Err::Incomplete(n) => Err::Incomplete(n), + Err::Failure(t) => Err::Failure(f(t)), + Err::Error(t) => Err::Error(f(t)), + } + } + + /// Automatically converts between errors if the underlying type supports it + pub fn convert<F>(e: Err<F>) -> Self + where + E: From<F>, + { + e.map(crate::lib::std::convert::Into::into) + } +} + +impl<T> Err<(T, ErrorKind)> { + /// Maps `Err<(T, ErrorKind)>` to `Err<(U, ErrorKind)>` with the given `F: T -> U` + pub fn map_input<U, F>(self, f: F) -> Err<(U, ErrorKind)> + where + F: FnOnce(T) -> U, + { + match self { + Err::Incomplete(n) => Err::Incomplete(n), + Err::Failure((input, k)) => Err::Failure((f(input), k)), + Err::Error((input, k)) => Err::Error((f(input), k)), + } + } +} + +impl<T> Err<error::Error<T>> { + /// Maps `Err<error::Error<T>>` to `Err<error::Error<U>>` with the given `F: T -> U` + pub fn map_input<U, F>(self, f: F) -> Err<error::Error<U>> + where + F: FnOnce(T) -> U, + { + match self { + Err::Incomplete(n) => Err::Incomplete(n), + Err::Failure(error::Error { input, code }) => Err::Failure(error::Error { + input: f(input), + code, + }), + Err::Error(error::Error { input, code }) => Err::Error(error::Error { + input: f(input), + code, + }), + } + } +} + +#[cfg(feature = "alloc")] +use crate::lib::std::{borrow::ToOwned, string::String, vec::Vec}; +#[cfg(feature = "alloc")] +impl Err<(&[u8], ErrorKind)> { + /// Obtaining ownership + #[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] + pub fn to_owned(self) -> Err<(Vec<u8>, ErrorKind)> { + self.map_input(ToOwned::to_owned) + } +} + +#[cfg(feature = "alloc")] +impl Err<(&str, ErrorKind)> { + /// Obtaining ownership + #[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] + pub fn to_owned(self) -> Err<(String, ErrorKind)> { + self.map_input(ToOwned::to_owned) + } +} + +#[cfg(feature = "alloc")] +impl Err<error::Error<&[u8]>> { + /// Obtaining ownership + #[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] + pub fn to_owned(self) -> Err<error::Error<Vec<u8>>> { + self.map_input(ToOwned::to_owned) + } +} + +#[cfg(feature = "alloc")] +impl Err<error::Error<&str>> { + /// Obtaining ownership + #[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] + pub fn to_owned(self) -> Err<error::Error<String>> { + self.map_input(ToOwned::to_owned) + } +} + +impl<E: Eq> Eq for Err<E> {} + +impl<E> fmt::Display for Err<E> +where + E: fmt::Debug, +{ + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Err::Incomplete(Needed::Size(u)) => write!(f, "Parsing requires {} bytes/chars", u), + Err::Incomplete(Needed::Unknown) => write!(f, "Parsing requires more data"), + Err::Failure(c) => write!(f, "Parsing Failure: {:?}", c), + Err::Error(c) => write!(f, "Parsing Error: {:?}", c), + } + } +} + +#[cfg(feature = "std")] +use std::error::Error; + +#[cfg(feature = "std")] +impl<E> Error for Err<E> +where + E: fmt::Debug, +{ + fn source(&self) -> Option<&(dyn Error + 'static)> { + None // no underlying error + } +} + +/// All nom parsers implement this trait +pub trait Parser<I, O, E> { + /// A parser takes in input type, and returns a `Result` containing + /// either the remaining input and the output value, or an error + fn parse(&mut self, input: I) -> IResult<I, O, E>; + + /// Maps a function over the result of a parser + fn map<G, O2>(self, g: G) -> Map<Self, G, O> + where + G: Fn(O) -> O2, + Self: core::marker::Sized, + { + Map { + f: self, + g, + phantom: core::marker::PhantomData, + } + } + + /// Creates a second parser from the output of the first one, then apply over the rest of the input + fn flat_map<G, H, O2>(self, g: G) -> FlatMap<Self, G, O> + where + G: FnMut(O) -> H, + H: Parser<I, O2, E>, + Self: core::marker::Sized, + { + FlatMap { + f: self, + g, + phantom: core::marker::PhantomData, + } + } + + /// Applies a second parser over the output of the first one + fn and_then<G, O2>(self, g: G) -> AndThen<Self, G, O> + where + G: Parser<O, O2, E>, + Self: core::marker::Sized, + { + AndThen { + f: self, + g, + phantom: core::marker::PhantomData, + } + } + + /// Applies a second parser after the first one, return their results as a tuple + fn and<G, O2>(self, g: G) -> And<Self, G> + where + G: Parser<I, O2, E>, + Self: core::marker::Sized, + { + And { f: self, g } + } + + /// Applies a second parser over the input if the first one failed + fn or<G>(self, g: G) -> Or<Self, G> + where + G: Parser<I, O, E>, + Self: core::marker::Sized, + { + Or { f: self, g } + } + + /// automatically converts the parser's output and error values to another type, as long as they + /// implement the `From` trait + fn into<O2: From<O>, E2: From<E>>(self) -> Into<Self, O, O2, E, E2> + where + Self: core::marker::Sized, + { + Into { + f: self, + phantom_out1: core::marker::PhantomData, + phantom_err1: core::marker::PhantomData, + phantom_out2: core::marker::PhantomData, + phantom_err2: core::marker::PhantomData, + } + } +} + +impl<'a, I, O, E, F> Parser<I, O, E> for F +where + F: FnMut(I) -> IResult<I, O, E> + 'a, +{ + fn parse(&mut self, i: I) -> IResult<I, O, E> { + self(i) + } +} + +#[cfg(feature = "alloc")] +use alloc::boxed::Box; + +#[cfg(feature = "alloc")] +impl<'a, I, O, E> Parser<I, O, E> for Box<dyn Parser<I, O, E> + 'a> { + fn parse(&mut self, input: I) -> IResult<I, O, E> { + (**self).parse(input) + } +} + +/// Implementation of `Parser::map` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct Map<F, G, O1> { + f: F, + g: G, + phantom: core::marker::PhantomData<O1>, +} + +impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Fn(O1) -> O2> Parser<I, O2, E> for Map<F, G, O1> { + fn parse(&mut self, i: I) -> IResult<I, O2, E> { + match self.f.parse(i) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, (self.g)(o))), + } + } +} + +/// Implementation of `Parser::flat_map` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct FlatMap<F, G, O1> { + f: F, + g: G, + phantom: core::marker::PhantomData<O1>, +} + +impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Fn(O1) -> H, H: Parser<I, O2, E>> Parser<I, O2, E> + for FlatMap<F, G, O1> +{ + fn parse(&mut self, i: I) -> IResult<I, O2, E> { + let (i, o1) = self.f.parse(i)?; + (self.g)(o1).parse(i) + } +} + +/// Implementation of `Parser::and_then` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct AndThen<F, G, O1> { + f: F, + g: G, + phantom: core::marker::PhantomData<O1>, +} + +impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Parser<O1, O2, E>> Parser<I, O2, E> + for AndThen<F, G, O1> +{ + fn parse(&mut self, i: I) -> IResult<I, O2, E> { + let (i, o1) = self.f.parse(i)?; + let (_, o2) = self.g.parse(o1)?; + Ok((i, o2)) + } +} + +/// Implementation of `Parser::and` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct And<F, G> { + f: F, + g: G, +} + +impl<'a, I, O1, O2, E, F: Parser<I, O1, E>, G: Parser<I, O2, E>> Parser<I, (O1, O2), E> + for And<F, G> +{ + fn parse(&mut self, i: I) -> IResult<I, (O1, O2), E> { + let (i, o1) = self.f.parse(i)?; + let (i, o2) = self.g.parse(i)?; + Ok((i, (o1, o2))) + } +} + +/// Implementation of `Parser::or` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct Or<F, G> { + f: F, + g: G, +} + +impl<'a, I: Clone, O, E: crate::error::ParseError<I>, F: Parser<I, O, E>, G: Parser<I, O, E>> + Parser<I, O, E> for Or<F, G> +{ + fn parse(&mut self, i: I) -> IResult<I, O, E> { + match self.f.parse(i.clone()) { + Err(Err::Error(e1)) => match self.g.parse(i) { + Err(Err::Error(e2)) => Err(Err::Error(e1.or(e2))), + res => res, + }, + res => res, + } + } +} + +/// Implementation of `Parser::into` +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +pub struct Into<F, O1, O2: From<O1>, E1, E2: From<E1>> { + f: F, + phantom_out1: core::marker::PhantomData<O1>, + phantom_err1: core::marker::PhantomData<E1>, + phantom_out2: core::marker::PhantomData<O2>, + phantom_err2: core::marker::PhantomData<E2>, +} + +impl< + 'a, + I: Clone, + O1, + O2: From<O1>, + E1, + E2: crate::error::ParseError<I> + From<E1>, + F: Parser<I, O1, E1>, + > Parser<I, O2, E2> for Into<F, O1, O2, E1, E2> +{ + fn parse(&mut self, i: I) -> IResult<I, O2, E2> { + match self.f.parse(i) { + Ok((i, o)) => Ok((i, o.into())), + Err(Err::Error(e)) => Err(Err::Error(e.into())), + Err(Err::Failure(e)) => Err(Err::Failure(e.into())), + Err(Err::Incomplete(e)) => Err(Err::Incomplete(e)), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::error::ErrorKind; + + #[doc(hidden)] + #[macro_export] + macro_rules! assert_size ( + ($t:ty, $sz:expr) => ( + assert_eq!(crate::lib::std::mem::size_of::<$t>(), $sz); + ); + ); + + #[test] + #[cfg(target_pointer_width = "64")] + fn size_test() { + assert_size!(IResult<&[u8], &[u8], (&[u8], u32)>, 40); + //FIXME: since rust 1.65, this is now 32 bytes, likely thanks to https://github.com/rust-lang/rust/pull/94075 + // deactivating that test for now because it'll have different values depending on the rust version + // assert_size!(IResult<&str, &str, u32>, 40); + assert_size!(Needed, 8); + assert_size!(Err<u32>, 16); + assert_size!(ErrorKind, 1); + } + + #[test] + fn err_map_test() { + let e = Err::Error(1); + assert_eq!(e.map(|v| v + 1), Err::Error(2)); + } +} diff --git a/third_party/rust/nom/src/lib.rs b/third_party/rust/nom/src/lib.rs new file mode 100644 index 0000000000..3beb2f4179 --- /dev/null +++ b/third_party/rust/nom/src/lib.rs @@ -0,0 +1,464 @@ +//! # nom, eating data byte by byte +//! +//! nom is a parser combinator library with a focus on safe parsing, +//! streaming patterns, and as much as possible zero copy. +//! +//! ## Example +//! +//! ```rust +//! use nom::{ +//! IResult, +//! bytes::complete::{tag, take_while_m_n}, +//! combinator::map_res, +//! sequence::tuple}; +//! +//! #[derive(Debug,PartialEq)] +//! pub struct Color { +//! pub red: u8, +//! pub green: u8, +//! pub blue: u8, +//! } +//! +//! fn from_hex(input: &str) -> Result<u8, std::num::ParseIntError> { +//! u8::from_str_radix(input, 16) +//! } +//! +//! fn is_hex_digit(c: char) -> bool { +//! c.is_digit(16) +//! } +//! +//! fn hex_primary(input: &str) -> IResult<&str, u8> { +//! map_res( +//! take_while_m_n(2, 2, is_hex_digit), +//! from_hex +//! )(input) +//! } +//! +//! fn hex_color(input: &str) -> IResult<&str, Color> { +//! let (input, _) = tag("#")(input)?; +//! let (input, (red, green, blue)) = tuple((hex_primary, hex_primary, hex_primary))(input)?; +//! +//! Ok((input, Color { red, green, blue })) +//! } +//! +//! fn main() { +//! assert_eq!(hex_color("#2F14DF"), Ok(("", Color { +//! red: 47, +//! green: 20, +//! blue: 223, +//! }))); +//! } +//! ``` +//! +//! The code is available on [Github](https://github.com/Geal/nom) +//! +//! There are a few [guides](https://github.com/Geal/nom/tree/main/doc) with more details +//! about [how to write parsers](https://github.com/Geal/nom/blob/main/doc/making_a_new_parser_from_scratch.md), +//! or the [error management system](https://github.com/Geal/nom/blob/main/doc/error_management.md). +//! You can also check out the [recipes] module that contains examples of common patterns. +//! +//! **Looking for a specific combinator? Read the +//! ["choose a combinator" guide](https://github.com/Geal/nom/blob/main/doc/choosing_a_combinator.md)** +//! +//! If you are upgrading to nom 5.0, please read the +//! [migration document](https://github.com/Geal/nom/blob/main/doc/upgrading_to_nom_5.md). +//! +//! ## Parser combinators +//! +//! Parser combinators are an approach to parsers that is very different from +//! software like [lex](https://en.wikipedia.org/wiki/Lex_(software)) and +//! [yacc](https://en.wikipedia.org/wiki/Yacc). Instead of writing the grammar +//! in a separate syntax and generating the corresponding code, you use very small +//! functions with very specific purposes, like "take 5 bytes", or "recognize the +//! word 'HTTP'", and assemble them in meaningful patterns like "recognize +//! 'HTTP', then a space, then a version". +//! The resulting code is small, and looks like the grammar you would have +//! written with other parser approaches. +//! +//! This gives us a few advantages: +//! +//! - The parsers are small and easy to write +//! - The parsers components are easy to reuse (if they're general enough, please add them to nom!) +//! - The parsers components are easy to test separately (unit tests and property-based tests) +//! - The parser combination code looks close to the grammar you would have written +//! - You can build partial parsers, specific to the data you need at the moment, and ignore the rest +//! +//! Here is an example of one such parser, to recognize text between parentheses: +//! +//! ```rust +//! use nom::{ +//! IResult, +//! sequence::delimited, +//! // see the "streaming/complete" paragraph lower for an explanation of these submodules +//! character::complete::char, +//! bytes::complete::is_not +//! }; +//! +//! fn parens(input: &str) -> IResult<&str, &str> { +//! delimited(char('('), is_not(")"), char(')'))(input) +//! } +//! ``` +//! +//! It defines a function named `parens` which will recognize a sequence of the +//! character `(`, the longest byte array not containing `)`, then the character +//! `)`, and will return the byte array in the middle. +//! +//! Here is another parser, written without using nom's combinators this time: +//! +//! ```rust +//! use nom::{IResult, Err, Needed}; +//! +//! # fn main() { +//! fn take4(i: &[u8]) -> IResult<&[u8], &[u8]>{ +//! if i.len() < 4 { +//! Err(Err::Incomplete(Needed::new(4))) +//! } else { +//! Ok((&i[4..], &i[0..4])) +//! } +//! } +//! # } +//! ``` +//! +//! This function takes a byte array as input, and tries to consume 4 bytes. +//! Writing all the parsers manually, like this, is dangerous, despite Rust's +//! safety features. There are still a lot of mistakes one can make. That's why +//! nom provides a list of functions to help in developing parsers. +//! +//! With functions, you would write it like this: +//! +//! ```rust +//! use nom::{IResult, bytes::streaming::take}; +//! fn take4(input: &str) -> IResult<&str, &str> { +//! take(4u8)(input) +//! } +//! ``` +//! +//! A parser in nom is a function which, for an input type `I`, an output type `O` +//! and an optional error type `E`, will have the following signature: +//! +//! ```rust,compile_fail +//! fn parser(input: I) -> IResult<I, O, E>; +//! ``` +//! +//! Or like this, if you don't want to specify a custom error type (it will be `(I, ErrorKind)` by default): +//! +//! ```rust,compile_fail +//! fn parser(input: I) -> IResult<I, O>; +//! ``` +//! +//! `IResult` is an alias for the `Result` type: +//! +//! ```rust +//! use nom::{Needed, error::Error}; +//! +//! type IResult<I, O, E = Error<I>> = Result<(I, O), Err<E>>; +//! +//! enum Err<E> { +//! Incomplete(Needed), +//! Error(E), +//! Failure(E), +//! } +//! ``` +//! +//! It can have the following values: +//! +//! - A correct result `Ok((I,O))` with the first element being the remaining of the input (not parsed yet), and the second the output value; +//! - An error `Err(Err::Error(c))` with `c` an error that can be built from the input position and a parser specific error +//! - An error `Err(Err::Incomplete(Needed))` indicating that more input is necessary. `Needed` can indicate how much data is needed +//! - An error `Err(Err::Failure(c))`. It works like the `Error` case, except it indicates an unrecoverable error: We cannot backtrack and test another parser +//! +//! Please refer to the ["choose a combinator" guide](https://github.com/Geal/nom/blob/main/doc/choosing_a_combinator.md) for an exhaustive list of parsers. +//! See also the rest of the documentation [here](https://github.com/Geal/nom/blob/main/doc). +//! +//! ## Making new parsers with function combinators +//! +//! nom is based on functions that generate parsers, with a signature like +//! this: `(arguments) -> impl Fn(Input) -> IResult<Input, Output, Error>`. +//! The arguments of a combinator can be direct values (like `take` which uses +//! a number of bytes or character as argument) or even other parsers (like +//! `delimited` which takes as argument 3 parsers, and returns the result of +//! the second one if all are successful). +//! +//! Here are some examples: +//! +//! ```rust +//! use nom::IResult; +//! use nom::bytes::complete::{tag, take}; +//! fn abcd_parser(i: &str) -> IResult<&str, &str> { +//! tag("abcd")(i) // will consume bytes if the input begins with "abcd" +//! } +//! +//! fn take_10(i: &[u8]) -> IResult<&[u8], &[u8]> { +//! take(10u8)(i) // will consume and return 10 bytes of input +//! } +//! ``` +//! +//! ## Combining parsers +//! +//! There are higher level patterns, like the **`alt`** combinator, which +//! provides a choice between multiple parsers. If one branch fails, it tries +//! the next, and returns the result of the first parser that succeeds: +//! +//! ```rust +//! use nom::IResult; +//! use nom::branch::alt; +//! use nom::bytes::complete::tag; +//! +//! let mut alt_tags = alt((tag("abcd"), tag("efgh"))); +//! +//! assert_eq!(alt_tags(&b"abcdxxx"[..]), Ok((&b"xxx"[..], &b"abcd"[..]))); +//! assert_eq!(alt_tags(&b"efghxxx"[..]), Ok((&b"xxx"[..], &b"efgh"[..]))); +//! assert_eq!(alt_tags(&b"ijklxxx"[..]), Err(nom::Err::Error((&b"ijklxxx"[..], nom::error::ErrorKind::Tag)))); +//! ``` +//! +//! The **`opt`** combinator makes a parser optional. If the child parser returns +//! an error, **`opt`** will still succeed and return None: +//! +//! ```rust +//! use nom::{IResult, combinator::opt, bytes::complete::tag}; +//! fn abcd_opt(i: &[u8]) -> IResult<&[u8], Option<&[u8]>> { +//! opt(tag("abcd"))(i) +//! } +//! +//! assert_eq!(abcd_opt(&b"abcdxxx"[..]), Ok((&b"xxx"[..], Some(&b"abcd"[..])))); +//! assert_eq!(abcd_opt(&b"efghxxx"[..]), Ok((&b"efghxxx"[..], None))); +//! ``` +//! +//! **`many0`** applies a parser 0 or more times, and returns a vector of the aggregated results: +//! +//! ```rust +//! # #[cfg(feature = "alloc")] +//! # fn main() { +//! use nom::{IResult, multi::many0, bytes::complete::tag}; +//! use std::str; +//! +//! fn multi(i: &str) -> IResult<&str, Vec<&str>> { +//! many0(tag("abcd"))(i) +//! } +//! +//! let a = "abcdef"; +//! let b = "abcdabcdef"; +//! let c = "azerty"; +//! assert_eq!(multi(a), Ok(("ef", vec!["abcd"]))); +//! assert_eq!(multi(b), Ok(("ef", vec!["abcd", "abcd"]))); +//! assert_eq!(multi(c), Ok(("azerty", Vec::new()))); +//! # } +//! # #[cfg(not(feature = "alloc"))] +//! # fn main() {} +//! ``` +//! +//! Here are some basic combinators available: +//! +//! - **`opt`**: Will make the parser optional (if it returns the `O` type, the new parser returns `Option<O>`) +//! - **`many0`**: Will apply the parser 0 or more times (if it returns the `O` type, the new parser returns `Vec<O>`) +//! - **`many1`**: Will apply the parser 1 or more times +//! +//! There are more complex (and more useful) parsers like `tuple`, which is +//! used to apply a series of parsers then assemble their results. +//! +//! Example with `tuple`: +//! +//! ```rust +//! # fn main() { +//! use nom::{error::ErrorKind, Needed, +//! number::streaming::be_u16, +//! bytes::streaming::{tag, take}, +//! sequence::tuple}; +//! +//! let mut tpl = tuple((be_u16, take(3u8), tag("fg"))); +//! +//! assert_eq!( +//! tpl(&b"abcdefgh"[..]), +//! Ok(( +//! &b"h"[..], +//! (0x6162u16, &b"cde"[..], &b"fg"[..]) +//! )) +//! ); +//! assert_eq!(tpl(&b"abcde"[..]), Err(nom::Err::Incomplete(Needed::new(2)))); +//! let input = &b"abcdejk"[..]; +//! assert_eq!(tpl(input), Err(nom::Err::Error((&input[5..], ErrorKind::Tag)))); +//! # } +//! ``` +//! +//! But you can also use a sequence of combinators written in imperative style, +//! thanks to the `?` operator: +//! +//! ```rust +//! # fn main() { +//! use nom::{IResult, bytes::complete::tag}; +//! +//! #[derive(Debug, PartialEq)] +//! struct A { +//! a: u8, +//! b: u8 +//! } +//! +//! fn ret_int1(i:&[u8]) -> IResult<&[u8], u8> { Ok((i,1)) } +//! fn ret_int2(i:&[u8]) -> IResult<&[u8], u8> { Ok((i,2)) } +//! +//! fn f(i: &[u8]) -> IResult<&[u8], A> { +//! // if successful, the parser returns `Ok((remaining_input, output_value))` that we can destructure +//! let (i, _) = tag("abcd")(i)?; +//! let (i, a) = ret_int1(i)?; +//! let (i, _) = tag("efgh")(i)?; +//! let (i, b) = ret_int2(i)?; +//! +//! Ok((i, A { a, b })) +//! } +//! +//! let r = f(b"abcdefghX"); +//! assert_eq!(r, Ok((&b"X"[..], A{a: 1, b: 2}))); +//! # } +//! ``` +//! +//! ## Streaming / Complete +//! +//! Some of nom's modules have `streaming` or `complete` submodules. They hold +//! different variants of the same combinators. +//! +//! A streaming parser assumes that we might not have all of the input data. +//! This can happen with some network protocol or large file parsers, where the +//! input buffer can be full and need to be resized or refilled. +//! +//! A complete parser assumes that we already have all of the input data. +//! This will be the common case with small files that can be read entirely to +//! memory. +//! +//! Here is how it works in practice: +//! +//! ```rust +//! use nom::{IResult, Err, Needed, error::{Error, ErrorKind}, bytes, character}; +//! +//! fn take_streaming(i: &[u8]) -> IResult<&[u8], &[u8]> { +//! bytes::streaming::take(4u8)(i) +//! } +//! +//! fn take_complete(i: &[u8]) -> IResult<&[u8], &[u8]> { +//! bytes::complete::take(4u8)(i) +//! } +//! +//! // both parsers will take 4 bytes as expected +//! assert_eq!(take_streaming(&b"abcde"[..]), Ok((&b"e"[..], &b"abcd"[..]))); +//! assert_eq!(take_complete(&b"abcde"[..]), Ok((&b"e"[..], &b"abcd"[..]))); +//! +//! // if the input is smaller than 4 bytes, the streaming parser +//! // will return `Incomplete` to indicate that we need more data +//! assert_eq!(take_streaming(&b"abc"[..]), Err(Err::Incomplete(Needed::new(1)))); +//! +//! // but the complete parser will return an error +//! assert_eq!(take_complete(&b"abc"[..]), Err(Err::Error(Error::new(&b"abc"[..], ErrorKind::Eof)))); +//! +//! // the alpha0 function recognizes 0 or more alphabetic characters +//! fn alpha0_streaming(i: &str) -> IResult<&str, &str> { +//! character::streaming::alpha0(i) +//! } +//! +//! fn alpha0_complete(i: &str) -> IResult<&str, &str> { +//! character::complete::alpha0(i) +//! } +//! +//! // if there's a clear limit to the recognized characters, both parsers work the same way +//! assert_eq!(alpha0_streaming("abcd;"), Ok((";", "abcd"))); +//! assert_eq!(alpha0_complete("abcd;"), Ok((";", "abcd"))); +//! +//! // but when there's no limit, the streaming version returns `Incomplete`, because it cannot +//! // know if more input data should be recognized. The whole input could be "abcd;", or +//! // "abcde;" +//! assert_eq!(alpha0_streaming("abcd"), Err(Err::Incomplete(Needed::new(1)))); +//! +//! // while the complete version knows that all of the data is there +//! assert_eq!(alpha0_complete("abcd"), Ok(("", "abcd"))); +//! ``` +//! **Going further:** Read the [guides](https://github.com/Geal/nom/tree/main/doc), +//! check out the [recipes]! +#![cfg_attr(not(feature = "std"), no_std)] +#![cfg_attr(feature = "cargo-clippy", allow(clippy::doc_markdown))] +#![cfg_attr(feature = "docsrs", feature(doc_cfg))] +#![cfg_attr(feature = "docsrs", feature(extended_key_value_attributes))] +#![deny(missing_docs)] +#[cfg_attr(nightly, warn(rustdoc::missing_doc_code_examples))] +#[cfg(feature = "alloc")] +#[macro_use] +extern crate alloc; +#[cfg(doctest)] +extern crate doc_comment; + +#[cfg(doctest)] +doc_comment::doctest!("../README.md"); + +/// Lib module to re-export everything needed from `std` or `core`/`alloc`. This is how `serde` does +/// it, albeit there it is not public. +#[cfg_attr(nightly, allow(rustdoc::missing_doc_code_examples))] +pub mod lib { + /// `std` facade allowing `std`/`core` to be interchangeable. Reexports `alloc` crate optionally, + /// as well as `core` or `std` + #[cfg(not(feature = "std"))] + #[cfg_attr(nightly, allow(rustdoc::missing_doc_code_examples))] + /// internal std exports for no_std compatibility + pub mod std { + #[doc(hidden)] + #[cfg(not(feature = "alloc"))] + pub use core::borrow; + + #[cfg(feature = "alloc")] + #[doc(hidden)] + pub use alloc::{borrow, boxed, string, vec}; + + #[doc(hidden)] + pub use core::{cmp, convert, fmt, iter, mem, ops, option, result, slice, str}; + + /// internal reproduction of std prelude + #[doc(hidden)] + pub mod prelude { + pub use core::prelude as v1; + } + } + + #[cfg(feature = "std")] + #[cfg_attr(nightly, allow(rustdoc::missing_doc_code_examples))] + /// internal std exports for no_std compatibility + pub mod std { + #[doc(hidden)] + pub use std::{ + alloc, borrow, boxed, cmp, collections, convert, fmt, hash, iter, mem, ops, option, result, + slice, str, string, vec, + }; + + /// internal reproduction of std prelude + #[doc(hidden)] + pub mod prelude { + pub use std::prelude as v1; + } + } +} + +pub use self::bits::*; +pub use self::internal::*; +pub use self::traits::*; + +pub use self::str::*; + +#[macro_use] +mod macros; +#[macro_use] +pub mod error; + +pub mod branch; +pub mod combinator; +mod internal; +pub mod multi; +pub mod sequence; +mod traits; + +pub mod bits; +pub mod bytes; + +pub mod character; + +mod str; + +pub mod number; + +#[cfg(feature = "docsrs")] +#[cfg_attr(feature = "docsrs", cfg_attr(feature = "docsrs", doc = include_str!("../doc/nom_recipes.md")))] +pub mod recipes {} diff --git a/third_party/rust/nom/src/macros.rs b/third_party/rust/nom/src/macros.rs new file mode 100644 index 0000000000..980d2d90ed --- /dev/null +++ b/third_party/rust/nom/src/macros.rs @@ -0,0 +1,23 @@ +macro_rules! succ ( + (0, $submac:ident ! ($($rest:tt)*)) => ($submac!(1, $($rest)*)); + (1, $submac:ident ! ($($rest:tt)*)) => ($submac!(2, $($rest)*)); + (2, $submac:ident ! ($($rest:tt)*)) => ($submac!(3, $($rest)*)); + (3, $submac:ident ! ($($rest:tt)*)) => ($submac!(4, $($rest)*)); + (4, $submac:ident ! ($($rest:tt)*)) => ($submac!(5, $($rest)*)); + (5, $submac:ident ! ($($rest:tt)*)) => ($submac!(6, $($rest)*)); + (6, $submac:ident ! ($($rest:tt)*)) => ($submac!(7, $($rest)*)); + (7, $submac:ident ! ($($rest:tt)*)) => ($submac!(8, $($rest)*)); + (8, $submac:ident ! ($($rest:tt)*)) => ($submac!(9, $($rest)*)); + (9, $submac:ident ! ($($rest:tt)*)) => ($submac!(10, $($rest)*)); + (10, $submac:ident ! ($($rest:tt)*)) => ($submac!(11, $($rest)*)); + (11, $submac:ident ! ($($rest:tt)*)) => ($submac!(12, $($rest)*)); + (12, $submac:ident ! ($($rest:tt)*)) => ($submac!(13, $($rest)*)); + (13, $submac:ident ! ($($rest:tt)*)) => ($submac!(14, $($rest)*)); + (14, $submac:ident ! ($($rest:tt)*)) => ($submac!(15, $($rest)*)); + (15, $submac:ident ! ($($rest:tt)*)) => ($submac!(16, $($rest)*)); + (16, $submac:ident ! ($($rest:tt)*)) => ($submac!(17, $($rest)*)); + (17, $submac:ident ! ($($rest:tt)*)) => ($submac!(18, $($rest)*)); + (18, $submac:ident ! ($($rest:tt)*)) => ($submac!(19, $($rest)*)); + (19, $submac:ident ! ($($rest:tt)*)) => ($submac!(20, $($rest)*)); + (20, $submac:ident ! ($($rest:tt)*)) => ($submac!(21, $($rest)*)); +); diff --git a/third_party/rust/nom/src/multi/mod.rs b/third_party/rust/nom/src/multi/mod.rs new file mode 100644 index 0000000000..73129084e2 --- /dev/null +++ b/third_party/rust/nom/src/multi/mod.rs @@ -0,0 +1,1049 @@ +//! Combinators applying their child parser multiple times + +#[cfg(test)] +mod tests; + +use crate::error::ErrorKind; +use crate::error::ParseError; +use crate::internal::{Err, IResult, Needed, Parser}; +#[cfg(feature = "alloc")] +use crate::lib::std::vec::Vec; +use crate::traits::{InputLength, InputTake, ToUsize}; +use core::num::NonZeroUsize; + +/// Don't pre-allocate more than 64KiB when calling `Vec::with_capacity`. +/// +/// Pre-allocating memory is a nice optimization but count fields can't +/// always be trusted. We should clamp initial capacities to some reasonable +/// amount. This reduces the risk of a bogus count value triggering a panic +/// due to an OOM error. +/// +/// This does not affect correctness. Nom will always read the full number +/// of elements regardless of the capacity cap. +#[cfg(feature = "alloc")] +const MAX_INITIAL_CAPACITY_BYTES: usize = 65536; + +/// Repeats the embedded parser, gathering the results in a `Vec`. +/// +/// This stops on [`Err::Error`] and returns the results that were accumulated. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// +/// *Note*: if the parser passed in accepts empty inputs (like `alpha0` or `digit0`), `many0` will +/// return an error, to prevent going into an infinite loop +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::many0; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// many0(tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Ok(("123123", vec![]))); +/// assert_eq!(parser(""), Ok(("", vec![]))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn many0<I, O, E, F>(mut f: F) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |mut i: I| { + let mut acc = crate::lib::std::vec::Vec::with_capacity(4); + loop { + let len = i.input_len(); + match f.parse(i.clone()) { + Err(Err::Error(_)) => return Ok((i, acc)), + Err(e) => return Err(e), + Ok((i1, o)) => { + // infinite loop check: the parser must always consume + if i1.input_len() == len { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Many0))); + } + + i = i1; + acc.push(o); + } + } + } + } +} + +/// Runs the embedded parser, gathering the results in a `Vec`. +/// +/// This stops on [`Err::Error`] if there is at least one result, and returns the results that were accumulated. To instead chain an error up, +/// see [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// +/// *Note*: If the parser passed to `many1` accepts empty inputs +/// (like `alpha0` or `digit0`), `many1` will return an error, +/// to prevent going into an infinite loop. +/// +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::many1; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// many1(tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn many1<I, O, E, F>(mut f: F) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |mut i: I| match f.parse(i.clone()) { + Err(Err::Error(err)) => Err(Err::Error(E::append(i, ErrorKind::Many1, err))), + Err(e) => Err(e), + Ok((i1, o)) => { + let mut acc = crate::lib::std::vec::Vec::with_capacity(4); + acc.push(o); + i = i1; + + loop { + let len = i.input_len(); + match f.parse(i.clone()) { + Err(Err::Error(_)) => return Ok((i, acc)), + Err(e) => return Err(e), + Ok((i1, o)) => { + // infinite loop check: the parser must always consume + if i1.input_len() == len { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Many1))); + } + + i = i1; + acc.push(o); + } + } + } + } + } +} + +/// Applies the parser `f` until the parser `g` produces a result. +/// +/// Returns a tuple of the results of `f` in a `Vec` and the result of `g`. +/// +/// `f` keeps going so long as `g` produces [`Err::Error`]. To instead chain an error up, see [`cut`][crate::combinator::cut]. +/// +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::many_till; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, (Vec<&str>, &str)> { +/// many_till(tag("abc"), tag("end"))(s) +/// }; +/// +/// assert_eq!(parser("abcabcend"), Ok(("", (vec!["abc", "abc"], "end")))); +/// assert_eq!(parser("abc123end"), Err(Err::Error(Error::new("123end", ErrorKind::Tag)))); +/// assert_eq!(parser("123123end"), Err(Err::Error(Error::new("123123end", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// assert_eq!(parser("abcendefg"), Ok(("efg", (vec!["abc"], "end")))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn many_till<I, O, P, E, F, G>( + mut f: F, + mut g: G, +) -> impl FnMut(I) -> IResult<I, (Vec<O>, P), E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: Parser<I, P, E>, + E: ParseError<I>, +{ + move |mut i: I| { + let mut res = crate::lib::std::vec::Vec::new(); + loop { + let len = i.input_len(); + match g.parse(i.clone()) { + Ok((i1, o)) => return Ok((i1, (res, o))), + Err(Err::Error(_)) => { + match f.parse(i.clone()) { + Err(Err::Error(err)) => return Err(Err::Error(E::append(i, ErrorKind::ManyTill, err))), + Err(e) => return Err(e), + Ok((i1, o)) => { + // infinite loop check: the parser must always consume + if i1.input_len() == len { + return Err(Err::Error(E::from_error_kind(i1, ErrorKind::ManyTill))); + } + + res.push(o); + i = i1; + } + } + } + Err(e) => return Err(e), + } + } + } +} + +/// Alternates between two parsers to produce a list of elements. +/// +/// This stops when either parser returns [`Err::Error`] and returns the results that were accumulated. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `sep` Parses the separator between list elements. +/// * `f` Parses the elements of the list. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::separated_list0; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// separated_list0(tag("|"), tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abc|abc|abc"), Ok(("", vec!["abc", "abc", "abc"]))); +/// assert_eq!(parser("abc123abc"), Ok(("123abc", vec!["abc"]))); +/// assert_eq!(parser("abc|def"), Ok(("|def", vec!["abc"]))); +/// assert_eq!(parser(""), Ok(("", vec![]))); +/// assert_eq!(parser("def|abc"), Ok(("def|abc", vec![]))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn separated_list0<I, O, O2, E, F, G>( + mut sep: G, + mut f: F, +) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: Parser<I, O2, E>, + E: ParseError<I>, +{ + move |mut i: I| { + let mut res = Vec::new(); + + match f.parse(i.clone()) { + Err(Err::Error(_)) => return Ok((i, res)), + Err(e) => return Err(e), + Ok((i1, o)) => { + res.push(o); + i = i1; + } + } + + loop { + let len = i.input_len(); + match sep.parse(i.clone()) { + Err(Err::Error(_)) => return Ok((i, res)), + Err(e) => return Err(e), + Ok((i1, _)) => { + // infinite loop check: the parser must always consume + if i1.input_len() == len { + return Err(Err::Error(E::from_error_kind(i1, ErrorKind::SeparatedList))); + } + + match f.parse(i1.clone()) { + Err(Err::Error(_)) => return Ok((i, res)), + Err(e) => return Err(e), + Ok((i2, o)) => { + res.push(o); + i = i2; + } + } + } + } + } + } +} + +/// Alternates between two parsers to produce a list of elements until [`Err::Error`]. +/// +/// Fails if the element parser does not produce at least one element.$ +/// +/// This stops when either parser returns [`Err::Error`] and returns the results that were accumulated. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `sep` Parses the separator between list elements. +/// * `f` Parses the elements of the list. +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::separated_list1; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// separated_list1(tag("|"), tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abc|abc|abc"), Ok(("", vec!["abc", "abc", "abc"]))); +/// assert_eq!(parser("abc123abc"), Ok(("123abc", vec!["abc"]))); +/// assert_eq!(parser("abc|def"), Ok(("|def", vec!["abc"]))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// assert_eq!(parser("def|abc"), Err(Err::Error(Error::new("def|abc", ErrorKind::Tag)))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn separated_list1<I, O, O2, E, F, G>( + mut sep: G, + mut f: F, +) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: Parser<I, O2, E>, + E: ParseError<I>, +{ + move |mut i: I| { + let mut res = Vec::new(); + + // Parse the first element + match f.parse(i.clone()) { + Err(e) => return Err(e), + Ok((i1, o)) => { + res.push(o); + i = i1; + } + } + + loop { + let len = i.input_len(); + match sep.parse(i.clone()) { + Err(Err::Error(_)) => return Ok((i, res)), + Err(e) => return Err(e), + Ok((i1, _)) => { + // infinite loop check: the parser must always consume + if i1.input_len() == len { + return Err(Err::Error(E::from_error_kind(i1, ErrorKind::SeparatedList))); + } + + match f.parse(i1.clone()) { + Err(Err::Error(_)) => return Ok((i, res)), + Err(e) => return Err(e), + Ok((i2, o)) => { + res.push(o); + i = i2; + } + } + } + } + } + } +} + +/// Repeats the embedded parser `m..=n` times +/// +/// This stops before `n` when the parser returns [`Err::Error`] and returns the results that were accumulated. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `m` The minimum number of iterations. +/// * `n` The maximum number of iterations. +/// * `f` The parser to apply. +/// +/// *Note*: If the parser passed to `many1` accepts empty inputs +/// (like `alpha0` or `digit0`), `many1` will return an error, +/// to prevent going into an infinite loop. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::many_m_n; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// many_m_n(0, 2, tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Ok(("123123", vec![]))); +/// assert_eq!(parser(""), Ok(("", vec![]))); +/// assert_eq!(parser("abcabcabc"), Ok(("abc", vec!["abc", "abc"]))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn many_m_n<I, O, E, F>( + min: usize, + max: usize, + mut parse: F, +) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |mut input: I| { + if min > max { + return Err(Err::Failure(E::from_error_kind(input, ErrorKind::ManyMN))); + } + + let max_initial_capacity = + MAX_INITIAL_CAPACITY_BYTES / crate::lib::std::mem::size_of::<O>().max(1); + let mut res = crate::lib::std::vec::Vec::with_capacity(min.min(max_initial_capacity)); + for count in 0..max { + let len = input.input_len(); + match parse.parse(input.clone()) { + Ok((tail, value)) => { + // infinite loop check: the parser must always consume + if tail.input_len() == len { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::ManyMN))); + } + + res.push(value); + input = tail; + } + Err(Err::Error(e)) => { + if count < min { + return Err(Err::Error(E::append(input, ErrorKind::ManyMN, e))); + } else { + return Ok((input, res)); + } + } + Err(e) => { + return Err(e); + } + } + } + + Ok((input, res)) + } +} + +/// Repeats the embedded parser, counting the results +/// +/// This stops on [`Err::Error`]. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// +/// *Note*: if the parser passed in accepts empty inputs (like `alpha0` or `digit0`), `many0` will +/// return an error, to prevent going into an infinite loop +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::many0_count; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, usize> { +/// many0_count(tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", 2))); +/// assert_eq!(parser("abc123"), Ok(("123", 1))); +/// assert_eq!(parser("123123"), Ok(("123123", 0))); +/// assert_eq!(parser(""), Ok(("", 0))); +/// ``` +pub fn many0_count<I, O, E, F>(mut f: F) -> impl FnMut(I) -> IResult<I, usize, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |i: I| { + let mut input = i; + let mut count = 0; + + loop { + let input_ = input.clone(); + let len = input.input_len(); + match f.parse(input_) { + Ok((i, _)) => { + // infinite loop check: the parser must always consume + if i.input_len() == len { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Many0Count))); + } + + input = i; + count += 1; + } + + Err(Err::Error(_)) => return Ok((input, count)), + + Err(e) => return Err(e), + } + } + } +} + +/// Runs the embedded parser, counting the results. +/// +/// This stops on [`Err::Error`] if there is at least one result. To instead chain an error up, +/// see [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// +/// *Note*: If the parser passed to `many1` accepts empty inputs +/// (like `alpha0` or `digit0`), `many1` will return an error, +/// to prevent going into an infinite loop. +/// +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::many1_count; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, usize> { +/// many1_count(tag("abc"))(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", 2))); +/// assert_eq!(parser("abc123"), Ok(("123", 1))); +/// assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Many1Count)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Many1Count)))); +/// ``` +pub fn many1_count<I, O, E, F>(mut f: F) -> impl FnMut(I) -> IResult<I, usize, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |i: I| { + let i_ = i.clone(); + match f.parse(i_) { + Err(Err::Error(_)) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Many1Count))), + Err(i) => Err(i), + Ok((i1, _)) => { + let mut count = 1; + let mut input = i1; + + loop { + let len = input.input_len(); + let input_ = input.clone(); + match f.parse(input_) { + Err(Err::Error(_)) => return Ok((input, count)), + Err(e) => return Err(e), + Ok((i, _)) => { + // infinite loop check: the parser must always consume + if i.input_len() == len { + return Err(Err::Error(E::from_error_kind(i, ErrorKind::Many1Count))); + } + + count += 1; + input = i; + } + } + } + } + } + } +} + +/// Runs the embedded parser `count` times, gathering the results in a `Vec` +/// +/// # Arguments +/// * `f` The parser to apply. +/// * `count` How often to apply the parser. +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::count; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// count(tag("abc"), 2)(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Err(Err::Error(Error::new("123", ErrorKind::Tag)))); +/// assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// assert_eq!(parser("abcabcabc"), Ok(("abc", vec!["abc", "abc"]))); +/// ``` +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +pub fn count<I, O, E, F>(mut f: F, count: usize) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone + PartialEq, + F: Parser<I, O, E>, + E: ParseError<I>, +{ + move |i: I| { + let mut input = i.clone(); + let max_initial_capacity = + MAX_INITIAL_CAPACITY_BYTES / crate::lib::std::mem::size_of::<O>().max(1); + let mut res = crate::lib::std::vec::Vec::with_capacity(count.min(max_initial_capacity)); + + for _ in 0..count { + let input_ = input.clone(); + match f.parse(input_) { + Ok((i, o)) => { + res.push(o); + input = i; + } + Err(Err::Error(e)) => { + return Err(Err::Error(E::append(i, ErrorKind::Count, e))); + } + Err(e) => { + return Err(e); + } + } + } + + Ok((input, res)) + } +} + +/// Runs the embedded parser repeatedly, filling the given slice with results. +/// +/// This parser fails if the input runs out before the given slice is full. +/// +/// # Arguments +/// * `f` The parser to apply. +/// * `buf` The slice to fill +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::fill; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, [&str; 2]> { +/// let mut buf = ["", ""]; +/// let (rest, ()) = fill(tag("abc"), &mut buf)(s)?; +/// Ok((rest, buf)) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", ["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Err(Err::Error(Error::new("123", ErrorKind::Tag)))); +/// assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Tag)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag)))); +/// assert_eq!(parser("abcabcabc"), Ok(("abc", ["abc", "abc"]))); +/// ``` +pub fn fill<'a, I, O, E, F>(f: F, buf: &'a mut [O]) -> impl FnMut(I) -> IResult<I, (), E> + 'a +where + I: Clone + PartialEq, + F: Fn(I) -> IResult<I, O, E> + 'a, + E: ParseError<I>, +{ + move |i: I| { + let mut input = i.clone(); + + for elem in buf.iter_mut() { + let input_ = input.clone(); + match f(input_) { + Ok((i, o)) => { + *elem = o; + input = i; + } + Err(Err::Error(e)) => { + return Err(Err::Error(E::append(i, ErrorKind::Count, e))); + } + Err(e) => { + return Err(e); + } + } + } + + Ok((input, ())) + } +} + +/// Repeats the embedded parser, calling `g` to gather the results. +/// +/// This stops on [`Err::Error`]. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// * `init` A function returning the initial value. +/// * `g` The function that combines a result of `f` with +/// the current accumulator. +/// +/// *Note*: if the parser passed in accepts empty inputs (like `alpha0` or `digit0`), `many0` will +/// return an error, to prevent going into an infinite loop +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::fold_many0; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// fold_many0( +/// tag("abc"), +/// Vec::new, +/// |mut acc: Vec<_>, item| { +/// acc.push(item); +/// acc +/// } +/// )(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Ok(("123123", vec![]))); +/// assert_eq!(parser(""), Ok(("", vec![]))); +/// ``` +pub fn fold_many0<I, O, E, F, G, H, R>( + mut f: F, + mut init: H, + mut g: G, +) -> impl FnMut(I) -> IResult<I, R, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: FnMut(R, O) -> R, + H: FnMut() -> R, + E: ParseError<I>, +{ + move |i: I| { + let mut res = init(); + let mut input = i; + + loop { + let i_ = input.clone(); + let len = input.input_len(); + match f.parse(i_) { + Ok((i, o)) => { + // infinite loop check: the parser must always consume + if i.input_len() == len { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Many0))); + } + + res = g(res, o); + input = i; + } + Err(Err::Error(_)) => { + return Ok((input, res)); + } + Err(e) => { + return Err(e); + } + } + } + } +} + +/// Repeats the embedded parser, calling `g` to gather the results. +/// +/// This stops on [`Err::Error`] if there is at least one result. To instead chain an error up, +/// see [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `f` The parser to apply. +/// * `init` A function returning the initial value. +/// * `g` The function that combines a result of `f` with +/// the current accumulator. +/// +/// *Note*: If the parser passed to `many1` accepts empty inputs +/// (like `alpha0` or `digit0`), `many1` will return an error, +/// to prevent going into an infinite loop. +/// +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::multi::fold_many1; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// fold_many1( +/// tag("abc"), +/// Vec::new, +/// |mut acc: Vec<_>, item| { +/// acc.push(item); +/// acc +/// } +/// )(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Many1)))); +/// assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Many1)))); +/// ``` +pub fn fold_many1<I, O, E, F, G, H, R>( + mut f: F, + mut init: H, + mut g: G, +) -> impl FnMut(I) -> IResult<I, R, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: FnMut(R, O) -> R, + H: FnMut() -> R, + E: ParseError<I>, +{ + move |i: I| { + let _i = i.clone(); + let init = init(); + match f.parse(_i) { + Err(Err::Error(_)) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Many1))), + Err(e) => Err(e), + Ok((i1, o1)) => { + let mut acc = g(init, o1); + let mut input = i1; + + loop { + let _input = input.clone(); + let len = input.input_len(); + match f.parse(_input) { + Err(Err::Error(_)) => { + break; + } + Err(e) => return Err(e), + Ok((i, o)) => { + // infinite loop check: the parser must always consume + if i.input_len() == len { + return Err(Err::Failure(E::from_error_kind(i, ErrorKind::Many1))); + } + + acc = g(acc, o); + input = i; + } + } + } + + Ok((input, acc)) + } + } + } +} + +/// Repeats the embedded parser `m..=n` times, calling `g` to gather the results +/// +/// This stops before `n` when the parser returns [`Err::Error`]. To instead chain an error up, see +/// [`cut`][crate::combinator::cut]. +/// +/// # Arguments +/// * `m` The minimum number of iterations. +/// * `n` The maximum number of iterations. +/// * `f` The parser to apply. +/// * `init` A function returning the initial value. +/// * `g` The function that combines a result of `f` with +/// the current accumulator. +/// +/// *Note*: If the parser passed to `many1` accepts empty inputs +/// (like `alpha0` or `digit0`), `many1` will return an error, +/// to prevent going into an infinite loop. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::multi::fold_many_m_n; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &str) -> IResult<&str, Vec<&str>> { +/// fold_many_m_n( +/// 0, +/// 2, +/// tag("abc"), +/// Vec::new, +/// |mut acc: Vec<_>, item| { +/// acc.push(item); +/// acc +/// } +/// )(s) +/// } +/// +/// assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"]))); +/// assert_eq!(parser("abc123"), Ok(("123", vec!["abc"]))); +/// assert_eq!(parser("123123"), Ok(("123123", vec![]))); +/// assert_eq!(parser(""), Ok(("", vec![]))); +/// assert_eq!(parser("abcabcabc"), Ok(("abc", vec!["abc", "abc"]))); +/// ``` +pub fn fold_many_m_n<I, O, E, F, G, H, R>( + min: usize, + max: usize, + mut parse: F, + mut init: H, + mut fold: G, +) -> impl FnMut(I) -> IResult<I, R, E> +where + I: Clone + InputLength, + F: Parser<I, O, E>, + G: FnMut(R, O) -> R, + H: FnMut() -> R, + E: ParseError<I>, +{ + move |mut input: I| { + if min > max { + return Err(Err::Failure(E::from_error_kind(input, ErrorKind::ManyMN))); + } + + let mut acc = init(); + for count in 0..max { + let len = input.input_len(); + match parse.parse(input.clone()) { + Ok((tail, value)) => { + // infinite loop check: the parser must always consume + if tail.input_len() == len { + return Err(Err::Error(E::from_error_kind(tail, ErrorKind::ManyMN))); + } + + acc = fold(acc, value); + input = tail; + } + //FInputXMError: handle failure properly + Err(Err::Error(err)) => { + if count < min { + return Err(Err::Error(E::append(input, ErrorKind::ManyMN, err))); + } else { + break; + } + } + Err(e) => return Err(e), + } + } + + Ok((input, acc)) + } +} + +/// Gets a number from the parser and returns a +/// subslice of the input of that size. +/// If the parser returns `Incomplete`, +/// `length_data` will return an error. +/// # Arguments +/// * `f` The parser to apply. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed, IResult}; +/// use nom::number::complete::be_u16; +/// use nom::multi::length_data; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// length_data(be_u16)(s) +/// } +/// +/// assert_eq!(parser(b"\x00\x03abcefg"), Ok((&b"efg"[..], &b"abc"[..]))); +/// assert_eq!(parser(b"\x00\x03a"), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +pub fn length_data<I, N, E, F>(mut f: F) -> impl FnMut(I) -> IResult<I, I, E> +where + I: InputLength + InputTake, + N: ToUsize, + F: Parser<I, N, E>, + E: ParseError<I>, +{ + move |i: I| { + let (i, length) = f.parse(i)?; + + let length: usize = length.to_usize(); + + if let Some(needed) = length + .checked_sub(i.input_len()) + .and_then(NonZeroUsize::new) + { + Err(Err::Incomplete(Needed::Size(needed))) + } else { + Ok(i.take_split(length)) + } + } +} + +/// Gets a number from the first parser, +/// takes a subslice of the input of that size, +/// then applies the second parser on that subslice. +/// If the second parser returns `Incomplete`, +/// `length_value` will return an error. +/// # Arguments +/// * `f` The parser to apply. +/// * `g` The parser to apply on the subslice. +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::number::complete::be_u16; +/// use nom::multi::length_value; +/// use nom::bytes::complete::tag; +/// +/// fn parser(s: &[u8]) -> IResult<&[u8], &[u8]> { +/// length_value(be_u16, tag("abc"))(s) +/// } +/// +/// assert_eq!(parser(b"\x00\x03abcefg"), Ok((&b"efg"[..], &b"abc"[..]))); +/// assert_eq!(parser(b"\x00\x03123123"), Err(Err::Error(Error::new(&b"123"[..], ErrorKind::Tag)))); +/// assert_eq!(parser(b"\x00\x03a"), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +pub fn length_value<I, O, N, E, F, G>(mut f: F, mut g: G) -> impl FnMut(I) -> IResult<I, O, E> +where + I: Clone + InputLength + InputTake, + N: ToUsize, + F: Parser<I, N, E>, + G: Parser<I, O, E>, + E: ParseError<I>, +{ + move |i: I| { + let (i, length) = f.parse(i)?; + + let length: usize = length.to_usize(); + + if let Some(needed) = length + .checked_sub(i.input_len()) + .and_then(NonZeroUsize::new) + { + Err(Err::Incomplete(Needed::Size(needed))) + } else { + let (rest, i) = i.take_split(length); + match g.parse(i.clone()) { + Err(Err::Incomplete(_)) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Complete))), + Err(e) => Err(e), + Ok((_, o)) => Ok((rest, o)), + } + } + } +} + +/// Gets a number from the first parser, +/// then applies the second parser that many times. +/// # Arguments +/// * `f` The parser to apply to obtain the count. +/// * `g` The parser to apply repeatedly. +/// ```rust +/// # use nom::{Err, error::{Error, ErrorKind}, Needed, IResult}; +/// use nom::number::complete::u8; +/// use nom::multi::length_count; +/// use nom::bytes::complete::tag; +/// use nom::combinator::map; +/// +/// fn parser(s: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { +/// length_count(map(u8, |i| { +/// println!("got number: {}", i); +/// i +/// }), tag("abc"))(s) +/// } +/// +/// assert_eq!(parser(&b"\x02abcabcabc"[..]), Ok(((&b"abc"[..], vec![&b"abc"[..], &b"abc"[..]])))); +/// assert_eq!(parser(b"\x03123123123"), Err(Err::Error(Error::new(&b"123123123"[..], ErrorKind::Tag)))); +/// ``` +#[cfg(feature = "alloc")] +pub fn length_count<I, O, N, E, F, G>(mut f: F, mut g: G) -> impl FnMut(I) -> IResult<I, Vec<O>, E> +where + I: Clone, + N: ToUsize, + F: Parser<I, N, E>, + G: Parser<I, O, E>, + E: ParseError<I>, +{ + move |i: I| { + let (i, count) = f.parse(i)?; + let mut input = i.clone(); + let mut res = Vec::new(); + + for _ in 0..count.to_usize() { + let input_ = input.clone(); + match g.parse(input_) { + Ok((i, o)) => { + res.push(o); + input = i; + } + Err(Err::Error(e)) => { + return Err(Err::Error(E::append(i, ErrorKind::Count, e))); + } + Err(e) => { + return Err(e); + } + } + } + + Ok((input, res)) + } +} diff --git a/third_party/rust/nom/src/multi/tests.rs b/third_party/rust/nom/src/multi/tests.rs new file mode 100644 index 0000000000..96a6518176 --- /dev/null +++ b/third_party/rust/nom/src/multi/tests.rs @@ -0,0 +1,534 @@ +use super::{length_data, length_value, many0_count, many1_count}; +use crate::{ + bytes::streaming::tag, + character::streaming::digit1 as digit, + error::{ErrorKind, ParseError}, + internal::{Err, IResult, Needed}, + lib::std::str::{self, FromStr}, + number::streaming::{be_u16, be_u8}, + sequence::{pair, tuple}, +}; +#[cfg(feature = "alloc")] +use crate::{ + lib::std::vec::Vec, + multi::{ + count, fold_many0, fold_many1, fold_many_m_n, length_count, many0, many1, many_m_n, many_till, + separated_list0, separated_list1, + }, +}; + +#[test] +#[cfg(feature = "alloc")] +fn separated_list0_test() { + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list0(tag(","), tag("abcd"))(i) + } + fn multi_empty(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list0(tag(","), tag(""))(i) + } + fn empty_sep(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list0(tag(""), tag("abc"))(i) + } + fn multi_longsep(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list0(tag(".."), tag("abcd"))(i) + } + + let a = &b"abcdef"[..]; + let b = &b"abcd,abcdef"[..]; + let c = &b"azerty"[..]; + let d = &b",,abc"[..]; + let e = &b"abcd,abcd,ef"[..]; + let f = &b"abc"[..]; + let g = &b"abcd."[..]; + let h = &b"abcd,abc"[..]; + let i = &b"abcabc"[..]; + + let res1 = vec![&b"abcd"[..]]; + assert_eq!(multi(a), Ok((&b"ef"[..], res1))); + let res2 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(b), Ok((&b"ef"[..], res2))); + assert_eq!(multi(c), Ok((&b"azerty"[..], Vec::new()))); + let res3 = vec![&b""[..], &b""[..], &b""[..]]; + assert_eq!(multi_empty(d), Ok((&b"abc"[..], res3))); + let i_err_pos = &i[3..]; + assert_eq!( + empty_sep(i), + Err(Err::Error(error_position!( + i_err_pos, + ErrorKind::SeparatedList + ))) + ); + let res4 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(e), Ok((&b",ef"[..], res4))); + + assert_eq!(multi(f), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(multi_longsep(g), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(multi(h), Err(Err::Incomplete(Needed::new(1)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn separated_list1_test() { + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list1(tag(","), tag("abcd"))(i) + } + fn multi_longsep(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + separated_list1(tag(".."), tag("abcd"))(i) + } + + let a = &b"abcdef"[..]; + let b = &b"abcd,abcdef"[..]; + let c = &b"azerty"[..]; + let d = &b"abcd,abcd,ef"[..]; + + let f = &b"abc"[..]; + let g = &b"abcd."[..]; + let h = &b"abcd,abc"[..]; + + let res1 = vec![&b"abcd"[..]]; + assert_eq!(multi(a), Ok((&b"ef"[..], res1))); + let res2 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(b), Ok((&b"ef"[..], res2))); + assert_eq!( + multi(c), + Err(Err::Error(error_position!(c, ErrorKind::Tag))) + ); + let res3 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(d), Ok((&b",ef"[..], res3))); + + assert_eq!(multi(f), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(multi_longsep(g), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(multi(h), Err(Err::Incomplete(Needed::new(1)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn many0_test() { + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many0(tag("abcd"))(i) + } + fn multi_empty(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many0(tag(""))(i) + } + + assert_eq!(multi(&b"abcdef"[..]), Ok((&b"ef"[..], vec![&b"abcd"[..]]))); + assert_eq!( + multi(&b"abcdabcdefgh"[..]), + Ok((&b"efgh"[..], vec![&b"abcd"[..], &b"abcd"[..]])) + ); + assert_eq!(multi(&b"azerty"[..]), Ok((&b"azerty"[..], Vec::new()))); + assert_eq!(multi(&b"abcdab"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!(multi(&b"abcd"[..]), Err(Err::Incomplete(Needed::new(4)))); + assert_eq!(multi(&b""[..]), Err(Err::Incomplete(Needed::new(4)))); + assert_eq!( + multi_empty(&b"abcdef"[..]), + Err(Err::Error(error_position!( + &b"abcdef"[..], + ErrorKind::Many0 + ))) + ); +} + +#[test] +#[cfg(feature = "alloc")] +fn many1_test() { + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many1(tag("abcd"))(i) + } + + let a = &b"abcdef"[..]; + let b = &b"abcdabcdefgh"[..]; + let c = &b"azerty"[..]; + let d = &b"abcdab"[..]; + + let res1 = vec![&b"abcd"[..]]; + assert_eq!(multi(a), Ok((&b"ef"[..], res1))); + let res2 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(b), Ok((&b"efgh"[..], res2))); + assert_eq!( + multi(c), + Err(Err::Error(error_position!(c, ErrorKind::Tag))) + ); + assert_eq!(multi(d), Err(Err::Incomplete(Needed::new(2)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn many_till_test() { + fn multi(i: &[u8]) -> IResult<&[u8], (Vec<&[u8]>, &[u8])> { + many_till(tag("abcd"), tag("efgh"))(i) + } + + let a = b"abcdabcdefghabcd"; + let b = b"efghabcd"; + let c = b"azerty"; + + let res_a = (vec![&b"abcd"[..], &b"abcd"[..]], &b"efgh"[..]); + let res_b: (Vec<&[u8]>, &[u8]) = (Vec::new(), &b"efgh"[..]); + assert_eq!(multi(&a[..]), Ok((&b"abcd"[..], res_a))); + assert_eq!(multi(&b[..]), Ok((&b"abcd"[..], res_b))); + assert_eq!( + multi(&c[..]), + Err(Err::Error(error_node_position!( + &c[..], + ErrorKind::ManyTill, + error_position!(&c[..], ErrorKind::Tag) + ))) + ); +} + +#[test] +#[cfg(feature = "std")] +fn infinite_many() { + fn tst(input: &[u8]) -> IResult<&[u8], &[u8]> { + println!("input: {:?}", input); + Err(Err::Error(error_position!(input, ErrorKind::Tag))) + } + + // should not go into an infinite loop + fn multi0(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many0(tst)(i) + } + let a = &b"abcdef"[..]; + assert_eq!(multi0(a), Ok((a, Vec::new()))); + + fn multi1(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many1(tst)(i) + } + let a = &b"abcdef"[..]; + assert_eq!( + multi1(a), + Err(Err::Error(error_position!(a, ErrorKind::Tag))) + ); +} + +#[test] +#[cfg(feature = "alloc")] +fn many_m_n_test() { + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + many_m_n(2, 4, tag("Abcd"))(i) + } + + let a = &b"Abcdef"[..]; + let b = &b"AbcdAbcdefgh"[..]; + let c = &b"AbcdAbcdAbcdAbcdefgh"[..]; + let d = &b"AbcdAbcdAbcdAbcdAbcdefgh"[..]; + let e = &b"AbcdAb"[..]; + + assert_eq!( + multi(a), + Err(Err::Error(error_position!(&b"ef"[..], ErrorKind::Tag))) + ); + let res1 = vec![&b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(b), Ok((&b"efgh"[..], res1))); + let res2 = vec![&b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(c), Ok((&b"efgh"[..], res2))); + let res3 = vec![&b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(d), Ok((&b"Abcdefgh"[..], res3))); + assert_eq!(multi(e), Err(Err::Incomplete(Needed::new(2)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn count_test() { + const TIMES: usize = 2; + fn cnt_2(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + count(tag("abc"), TIMES)(i) + } + + assert_eq!( + cnt_2(&b"abcabcabcdef"[..]), + Ok((&b"abcdef"[..], vec![&b"abc"[..], &b"abc"[..]])) + ); + assert_eq!(cnt_2(&b"ab"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(cnt_2(&b"abcab"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!( + cnt_2(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + cnt_2(&b"xxxabcabcdef"[..]), + Err(Err::Error(error_position!( + &b"xxxabcabcdef"[..], + ErrorKind::Tag + ))) + ); + assert_eq!( + cnt_2(&b"abcxxxabcdef"[..]), + Err(Err::Error(error_position!( + &b"xxxabcdef"[..], + ErrorKind::Tag + ))) + ); +} + +#[test] +#[cfg(feature = "alloc")] +fn count_zero() { + const TIMES: usize = 0; + fn counter_2(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + count(tag("abc"), TIMES)(i) + } + + let done = &b"abcabcabcdef"[..]; + let parsed_done = Vec::new(); + let rest = done; + let incomplete_1 = &b"ab"[..]; + let parsed_incompl_1 = Vec::new(); + let incomplete_2 = &b"abcab"[..]; + let parsed_incompl_2 = Vec::new(); + let error = &b"xxx"[..]; + let error_remain = &b"xxx"[..]; + let parsed_err = Vec::new(); + let error_1 = &b"xxxabcabcdef"[..]; + let parsed_err_1 = Vec::new(); + let error_1_remain = &b"xxxabcabcdef"[..]; + let error_2 = &b"abcxxxabcdef"[..]; + let parsed_err_2 = Vec::new(); + let error_2_remain = &b"abcxxxabcdef"[..]; + + assert_eq!(counter_2(done), Ok((rest, parsed_done))); + assert_eq!( + counter_2(incomplete_1), + Ok((incomplete_1, parsed_incompl_1)) + ); + assert_eq!( + counter_2(incomplete_2), + Ok((incomplete_2, parsed_incompl_2)) + ); + assert_eq!(counter_2(error), Ok((error_remain, parsed_err))); + assert_eq!(counter_2(error_1), Ok((error_1_remain, parsed_err_1))); + assert_eq!(counter_2(error_2), Ok((error_2_remain, parsed_err_2))); +} + +#[derive(Debug, Clone, PartialEq)] +pub struct NilError; + +impl<I> From<(I, ErrorKind)> for NilError { + fn from(_: (I, ErrorKind)) -> Self { + NilError + } +} + +impl<I> ParseError<I> for NilError { + fn from_error_kind(_: I, _: ErrorKind) -> NilError { + NilError + } + fn append(_: I, _: ErrorKind, _: NilError) -> NilError { + NilError + } +} + +fn number(i: &[u8]) -> IResult<&[u8], u32> { + use crate::combinator::map_res; + + map_res(map_res(digit, str::from_utf8), FromStr::from_str)(i) +} + +#[test] +#[cfg(feature = "alloc")] +fn length_count_test() { + fn cnt(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + length_count(number, tag("abc"))(i) + } + + assert_eq!( + cnt(&b"2abcabcabcdef"[..]), + Ok((&b"abcdef"[..], vec![&b"abc"[..], &b"abc"[..]])) + ); + assert_eq!(cnt(&b"2ab"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(cnt(&b"3abcab"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!( + cnt(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Digit))) + ); + assert_eq!( + cnt(&b"2abcxxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn length_data_test() { + fn take(i: &[u8]) -> IResult<&[u8], &[u8]> { + length_data(number)(i) + } + + assert_eq!( + take(&b"6abcabcabcdef"[..]), + Ok((&b"abcdef"[..], &b"abcabc"[..])) + ); + assert_eq!(take(&b"3ab"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!( + take(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Digit))) + ); + assert_eq!(take(&b"2abcxxx"[..]), Ok((&b"cxxx"[..], &b"ab"[..]))); +} + +#[test] +fn length_value_test() { + fn length_value_1(i: &[u8]) -> IResult<&[u8], u16> { + length_value(be_u8, be_u16)(i) + } + fn length_value_2(i: &[u8]) -> IResult<&[u8], (u8, u8)> { + length_value(be_u8, tuple((be_u8, be_u8)))(i) + } + + let i1 = [0, 5, 6]; + assert_eq!( + length_value_1(&i1), + Err(Err::Error(error_position!(&b""[..], ErrorKind::Complete))) + ); + assert_eq!( + length_value_2(&i1), + Err(Err::Error(error_position!(&b""[..], ErrorKind::Complete))) + ); + + let i2 = [1, 5, 6, 3]; + assert_eq!( + length_value_1(&i2), + Err(Err::Error(error_position!(&i2[1..2], ErrorKind::Complete))) + ); + assert_eq!( + length_value_2(&i2), + Err(Err::Error(error_position!(&i2[1..2], ErrorKind::Complete))) + ); + + let i3 = [2, 5, 6, 3, 4, 5, 7]; + assert_eq!(length_value_1(&i3), Ok((&i3[3..], 1286))); + assert_eq!(length_value_2(&i3), Ok((&i3[3..], (5, 6)))); + + let i4 = [3, 5, 6, 3, 4, 5]; + assert_eq!(length_value_1(&i4), Ok((&i4[4..], 1286))); + assert_eq!(length_value_2(&i4), Ok((&i4[4..], (5, 6)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn fold_many0_test() { + fn fold_into_vec<T>(mut acc: Vec<T>, item: T) -> Vec<T> { + acc.push(item); + acc + } + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + fold_many0(tag("abcd"), Vec::new, fold_into_vec)(i) + } + fn multi_empty(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + fold_many0(tag(""), Vec::new, fold_into_vec)(i) + } + + assert_eq!(multi(&b"abcdef"[..]), Ok((&b"ef"[..], vec![&b"abcd"[..]]))); + assert_eq!( + multi(&b"abcdabcdefgh"[..]), + Ok((&b"efgh"[..], vec![&b"abcd"[..], &b"abcd"[..]])) + ); + assert_eq!(multi(&b"azerty"[..]), Ok((&b"azerty"[..], Vec::new()))); + assert_eq!(multi(&b"abcdab"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!(multi(&b"abcd"[..]), Err(Err::Incomplete(Needed::new(4)))); + assert_eq!(multi(&b""[..]), Err(Err::Incomplete(Needed::new(4)))); + assert_eq!( + multi_empty(&b"abcdef"[..]), + Err(Err::Error(error_position!( + &b"abcdef"[..], + ErrorKind::Many0 + ))) + ); +} + +#[test] +#[cfg(feature = "alloc")] +fn fold_many1_test() { + fn fold_into_vec<T>(mut acc: Vec<T>, item: T) -> Vec<T> { + acc.push(item); + acc + } + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + fold_many1(tag("abcd"), Vec::new, fold_into_vec)(i) + } + + let a = &b"abcdef"[..]; + let b = &b"abcdabcdefgh"[..]; + let c = &b"azerty"[..]; + let d = &b"abcdab"[..]; + + let res1 = vec![&b"abcd"[..]]; + assert_eq!(multi(a), Ok((&b"ef"[..], res1))); + let res2 = vec![&b"abcd"[..], &b"abcd"[..]]; + assert_eq!(multi(b), Ok((&b"efgh"[..], res2))); + assert_eq!( + multi(c), + Err(Err::Error(error_position!(c, ErrorKind::Many1))) + ); + assert_eq!(multi(d), Err(Err::Incomplete(Needed::new(2)))); +} + +#[test] +#[cfg(feature = "alloc")] +fn fold_many_m_n_test() { + fn fold_into_vec<T>(mut acc: Vec<T>, item: T) -> Vec<T> { + acc.push(item); + acc + } + fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> { + fold_many_m_n(2, 4, tag("Abcd"), Vec::new, fold_into_vec)(i) + } + + let a = &b"Abcdef"[..]; + let b = &b"AbcdAbcdefgh"[..]; + let c = &b"AbcdAbcdAbcdAbcdefgh"[..]; + let d = &b"AbcdAbcdAbcdAbcdAbcdefgh"[..]; + let e = &b"AbcdAb"[..]; + + assert_eq!( + multi(a), + Err(Err::Error(error_position!(&b"ef"[..], ErrorKind::Tag))) + ); + let res1 = vec![&b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(b), Ok((&b"efgh"[..], res1))); + let res2 = vec![&b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(c), Ok((&b"efgh"[..], res2))); + let res3 = vec![&b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..], &b"Abcd"[..]]; + assert_eq!(multi(d), Ok((&b"Abcdefgh"[..], res3))); + assert_eq!(multi(e), Err(Err::Incomplete(Needed::new(2)))); +} + +#[test] +fn many0_count_test() { + fn count0_nums(i: &[u8]) -> IResult<&[u8], usize> { + many0_count(pair(digit, tag(",")))(i) + } + + assert_eq!(count0_nums(&b"123,junk"[..]), Ok((&b"junk"[..], 1))); + + assert_eq!(count0_nums(&b"123,45,junk"[..]), Ok((&b"junk"[..], 2))); + + assert_eq!( + count0_nums(&b"1,2,3,4,5,6,7,8,9,0,junk"[..]), + Ok((&b"junk"[..], 10)) + ); + + assert_eq!(count0_nums(&b"hello"[..]), Ok((&b"hello"[..], 0))); +} + +#[test] +fn many1_count_test() { + fn count1_nums(i: &[u8]) -> IResult<&[u8], usize> { + many1_count(pair(digit, tag(",")))(i) + } + + assert_eq!(count1_nums(&b"123,45,junk"[..]), Ok((&b"junk"[..], 2))); + + assert_eq!( + count1_nums(&b"1,2,3,4,5,6,7,8,9,0,junk"[..]), + Ok((&b"junk"[..], 10)) + ); + + assert_eq!( + count1_nums(&b"hello"[..]), + Err(Err::Error(error_position!( + &b"hello"[..], + ErrorKind::Many1Count + ))) + ); +} diff --git a/third_party/rust/nom/src/number/complete.rs b/third_party/rust/nom/src/number/complete.rs new file mode 100644 index 0000000000..98b8b3abf8 --- /dev/null +++ b/third_party/rust/nom/src/number/complete.rs @@ -0,0 +1,2126 @@ +//! Parsers recognizing numbers, complete input version + +use crate::branch::alt; +use crate::bytes::complete::tag; +use crate::character::complete::{char, digit1, sign}; +use crate::combinator::{cut, map, opt, recognize}; +use crate::error::ParseError; +use crate::error::{make_error, ErrorKind}; +use crate::internal::*; +use crate::lib::std::ops::{Range, RangeFrom, RangeTo}; +use crate::sequence::{pair, tuple}; +use crate::traits::{ + AsBytes, AsChar, Compare, InputIter, InputLength, InputTake, InputTakeAtPosition, Offset, Slice, +}; + +/// Recognizes an unsigned 1 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u8; +/// +/// let parser = |s| { +/// be_u8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 2 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u16; +/// +/// let parser = |s| { +/// be_u16(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u16<I, E: ParseError<I>>(input: I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 2; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u16; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u16; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 3 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u24; +/// +/// let parser = |s| { +/// be_u24(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u24<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 3; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u32; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u32; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 4 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u32; +/// +/// let parser = |s| { +/// be_u32(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 4; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u32; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u32; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 8 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u64; +/// +/// let parser = |s| { +/// be_u64(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u64<I, E: ParseError<I>>(input: I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 8; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u64; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u64; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 16 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_u128; +/// +/// let parser = |s| { +/// be_u128(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_u128<I, E: ParseError<I>>(input: I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 16; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u128; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u128; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a signed 1 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i8; +/// +/// let parser = |s| { +/// be_i8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i8<I, E: ParseError<I>>(input: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u8.map(|x| x as i8).parse(input) +} + +/// Recognizes a big endian signed 2 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i16; +/// +/// let parser = |s| { +/// be_i16(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i16<I, E: ParseError<I>>(input: I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u16.map(|x| x as i16).parse(input) +} + +/// Recognizes a big endian signed 3 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i24; +/// +/// let parser = |s| { +/// be_i24(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i24<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + // Same as the unsigned version but we need to sign-extend manually here + be_u24 + .map(|x| { + if x & 0x80_00_00 != 0 { + (x | 0xff_00_00_00) as i32 + } else { + x as i32 + } + }) + .parse(input) +} + +/// Recognizes a big endian signed 4 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i32; +/// +/// let parser = |s| { +/// be_i32(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i32<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u32.map(|x| x as i32).parse(input) +} + +/// Recognizes a big endian signed 8 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i64; +/// +/// let parser = |s| { +/// be_i64(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i64<I, E: ParseError<I>>(input: I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u64.map(|x| x as i64).parse(input) +} + +/// Recognizes a big endian signed 16 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_i128; +/// +/// let parser = |s| { +/// be_i128(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_i128<I, E: ParseError<I>>(input: I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u128.map(|x| x as i128).parse(input) +} + +/// Recognizes an unsigned 1 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u8; +/// +/// let parser = |s| { +/// le_u8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 2 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u16; +/// +/// let parser = |s| { +/// le_u16(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u16<I, E: ParseError<I>>(input: I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 2; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u16; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u16) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 3 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u24; +/// +/// let parser = |s| { +/// le_u24(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u24<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 3; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u32; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u32) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 4 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u32; +/// +/// let parser = |s| { +/// le_u32(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 4; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u32; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u32) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 8 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u64; +/// +/// let parser = |s| { +/// le_u64(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u64<I, E: ParseError<I>>(input: I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 8; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u64; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u64) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 16 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_u128; +/// +/// let parser = |s| { +/// le_u128(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_u128<I, E: ParseError<I>>(input: I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 16; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let mut res = 0u128; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u128) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a signed 1 byte integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i8; +/// +/// let parser = |s| { +/// le_i8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i8<I, E: ParseError<I>>(input: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u8.map(|x| x as i8).parse(input) +} + +/// Recognizes a little endian signed 2 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i16; +/// +/// let parser = |s| { +/// le_i16(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i16<I, E: ParseError<I>>(input: I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u16.map(|x| x as i16).parse(input) +} + +/// Recognizes a little endian signed 3 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i24; +/// +/// let parser = |s| { +/// le_i24(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i24<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + // Same as the unsigned version but we need to sign-extend manually here + le_u24 + .map(|x| { + if x & 0x80_00_00 != 0 { + (x | 0xff_00_00_00) as i32 + } else { + x as i32 + } + }) + .parse(input) +} + +/// Recognizes a little endian signed 4 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i32; +/// +/// let parser = |s| { +/// le_i32(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i32<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u32.map(|x| x as i32).parse(input) +} + +/// Recognizes a little endian signed 8 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i64; +/// +/// let parser = |s| { +/// le_i64(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i64<I, E: ParseError<I>>(input: I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u64.map(|x| x as i64).parse(input) +} + +/// Recognizes a little endian signed 16 bytes integer. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_i128; +/// +/// let parser = |s| { +/// le_i128(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_i128<I, E: ParseError<I>>(input: I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u128.map(|x| x as i128).parse(input) +} + +/// Recognizes an unsigned 1 byte integer +/// +/// Note that endianness does not apply to 1 byte numbers. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u8; +/// +/// let parser = |s| { +/// u8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Error(make_error(input, ErrorKind::Eof))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes an unsigned 2 bytes integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u16 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u16 integer. +/// *complete version*: returns an error if there is not enough input data +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u16; +/// +/// let be_u16 = |s| { +/// u16(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(be_u16(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_u16 = |s| { +/// u16(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(le_u16(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u16<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u16, + crate::number::Endianness::Little => le_u16, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u16, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u16, + } +} + +/// Recognizes an unsigned 3 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u24 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u24 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u24; +/// +/// let be_u24 = |s| { +/// u24(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(be_u24(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_u24 = |s| { +/// u24(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(le_u24(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u24<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u24, + crate::number::Endianness::Little => le_u24, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u24, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u24, + } +} + +/// Recognizes an unsigned 4 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u32 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u32 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u32; +/// +/// let be_u32 = |s| { +/// u32(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(be_u32(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_u32 = |s| { +/// u32(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(le_u32(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u32, + crate::number::Endianness::Little => le_u32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u32, + } +} + +/// Recognizes an unsigned 8 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u64 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u64 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u64; +/// +/// let be_u64 = |s| { +/// u64(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(be_u64(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_u64 = |s| { +/// u64(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(le_u64(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u64, + crate::number::Endianness::Little => le_u64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u64, + } +} + +/// Recognizes an unsigned 16 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u128 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u128 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::u128; +/// +/// let be_u128 = |s| { +/// u128(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(be_u128(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_u128 = |s| { +/// u128(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(le_u128(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn u128<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u128, + crate::number::Endianness::Little => le_u128, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u128, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u128, + } +} + +/// Recognizes a signed 1 byte integer +/// +/// Note that endianness does not apply to 1 byte numbers. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i8; +/// +/// let parser = |s| { +/// i8(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Error((&[][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i8<I, E: ParseError<I>>(i: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + u8.map(|x| x as i8).parse(i) +} + +/// Recognizes a signed 2 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i16 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i16 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i16; +/// +/// let be_i16 = |s| { +/// i16(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(be_i16(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_i16 = |s| { +/// i16(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(le_i16(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i16<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i16, + crate::number::Endianness::Little => le_i16, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i16, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i16, + } +} + +/// Recognizes a signed 3 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i24 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i24 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i24; +/// +/// let be_i24 = |s| { +/// i24(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(be_i24(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_i24 = |s| { +/// i24(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(le_i24(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i24<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i24, + crate::number::Endianness::Little => le_i24, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i24, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i24, + } +} + +/// Recognizes a signed 4 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i32 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i32 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i32; +/// +/// let be_i32 = |s| { +/// i32(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(be_i32(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_i32 = |s| { +/// i32(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(le_i32(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i32, + crate::number::Endianness::Little => le_i32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i32, + } +} + +/// Recognizes a signed 8 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i64 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i64 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i64; +/// +/// let be_i64 = |s| { +/// i64(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(be_i64(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_i64 = |s| { +/// i64(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(le_i64(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i64, + crate::number::Endianness::Little => le_i64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i64, + } +} + +/// Recognizes a signed 16 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i128 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i128 integer. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::i128; +/// +/// let be_i128 = |s| { +/// i128(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(be_i128(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// +/// let le_i128 = |s| { +/// i128(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(le_i128(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn i128<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i128, + crate::number::Endianness::Little => le_i128, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i128, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i128, + } +} + +/// Recognizes a big endian 4 bytes floating point number. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_f32; +/// +/// let parser = |s| { +/// be_f32(s) +/// }; +/// +/// assert_eq!(parser(&[0x41, 0x48, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_f32<I, E: ParseError<I>>(input: I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match be_u32(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f32::from_bits(o))), + } +} + +/// Recognizes a big endian 8 bytes floating point number. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::be_f64; +/// +/// let parser = |s| { +/// be_f64(s) +/// }; +/// +/// assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn be_f64<I, E: ParseError<I>>(input: I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match be_u64(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f64::from_bits(o))), + } +} + +/// Recognizes a little endian 4 bytes floating point number. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_f32; +/// +/// let parser = |s| { +/// le_f32(s) +/// }; +/// +/// assert_eq!(parser(&[0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_f32<I, E: ParseError<I>>(input: I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match le_u32(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f32::from_bits(o))), + } +} + +/// Recognizes a little endian 8 bytes floating point number. +/// +/// *Complete version*: Returns an error if there is not enough input data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::le_f64; +/// +/// let parser = |s| { +/// le_f64(s) +/// }; +/// +/// assert_eq!(parser(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn le_f64<I, E: ParseError<I>>(input: I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match le_u64(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f64::from_bits(o))), + } +} + +/// Recognizes a 4 byte floating point number +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian f32 float, +/// otherwise if `nom::number::Endianness::Little` parse a little endian f32 float. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::f32; +/// +/// let be_f32 = |s| { +/// f32(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_f32(&[0x41, 0x48, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(be_f32(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// +/// let le_f32 = |s| { +/// f32(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_f32(&[0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(le_f32(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn f32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_f32, + crate::number::Endianness::Little => le_f32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_f32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_f32, + } +} + +/// Recognizes an 8 byte floating point number +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian f64 float, +/// otherwise if `nom::number::Endianness::Little` parse a little endian f64 float. +/// *complete version*: returns an error if there is not enough input data +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::f64; +/// +/// let be_f64 = |s| { +/// f64(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_f64(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(be_f64(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// +/// let le_f64 = |s| { +/// f64(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(le_f64(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof)))); +/// ``` +#[inline] +pub fn f64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_f64, + crate::number::Endianness::Little => le_f64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_f64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_f64, + } +} + +/// Recognizes a hex-encoded integer. +/// +/// *Complete version*: Will parse until the end of input if it has less than 8 bytes. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::hex_u32; +/// +/// let parser = |s| { +/// hex_u32(s) +/// }; +/// +/// assert_eq!(parser(&b"01AE"[..]), Ok((&b""[..], 0x01AE))); +/// assert_eq!(parser(&b"abc"[..]), Ok((&b""[..], 0x0ABC))); +/// assert_eq!(parser(&b"ggg"[..]), Err(Err::Error((&b"ggg"[..], ErrorKind::IsA)))); +/// ``` +#[inline] +pub fn hex_u32<'a, E: ParseError<&'a [u8]>>(input: &'a [u8]) -> IResult<&'a [u8], u32, E> { + let (i, o) = crate::bytes::complete::is_a(&b"0123456789abcdefABCDEF"[..])(input)?; + // Do not parse more than 8 characters for a u32 + let (parsed, remaining) = if o.len() <= 8 { + (o, i) + } else { + (&input[..8], &input[8..]) + }; + + let res = parsed + .iter() + .rev() + .enumerate() + .map(|(k, &v)| { + let digit = v as char; + digit.to_digit(16).unwrap_or(0) << (k * 4) + }) + .sum(); + + Ok((remaining, res)) +} + +/// Recognizes floating point number in a byte string and returns the corresponding slice. +/// +/// *Complete version*: Can parse until the end of input. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::recognize_float; +/// +/// let parser = |s| { +/// recognize_float(s) +/// }; +/// +/// assert_eq!(parser("11e-1"), Ok(("", "11e-1"))); +/// assert_eq!(parser("123E-02"), Ok(("", "123E-02"))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", "123"))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Char)))); +/// ``` +#[rustfmt::skip] +pub fn recognize_float<T, E:ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter, + <T as InputIter>::Item: AsChar, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + recognize( + tuple(( + opt(alt((char('+'), char('-')))), + alt(( + map(tuple((digit1, opt(pair(char('.'), opt(digit1))))), |_| ()), + map(tuple((char('.'), digit1)), |_| ()) + )), + opt(tuple(( + alt((char('e'), char('E'))), + opt(alt((char('+'), char('-')))), + cut(digit1) + ))) + )) + )(input) +} + +// workaround until issues with minimal-lexical are fixed +#[doc(hidden)] +pub fn recognize_float_or_exceptions<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter + InputTake + Compare<&'static str>, + <T as InputIter>::Item: AsChar, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + alt(( + |i: T| { + recognize_float::<_, E>(i.clone()).map_err(|e| match e { + crate::Err::Error(_) => crate::Err::Error(E::from_error_kind(i, ErrorKind::Float)), + crate::Err::Failure(_) => crate::Err::Failure(E::from_error_kind(i, ErrorKind::Float)), + crate::Err::Incomplete(needed) => crate::Err::Incomplete(needed), + }) + }, + |i: T| { + crate::bytes::complete::tag_no_case::<_, _, E>("nan")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + |i: T| { + crate::bytes::complete::tag_no_case::<_, _, E>("inf")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + |i: T| { + crate::bytes::complete::tag_no_case::<_, _, E>("infinity")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + ))(input) +} + +/// Recognizes a floating point number in text format +/// +/// It returns a tuple of (`sign`, `integer part`, `fraction part` and `exponent`) of the input +/// data. +/// +/// *Complete version*: Can parse until the end of input. +/// +pub fn recognize_float_parts<T, E: ParseError<T>>(input: T) -> IResult<T, (bool, T, T, i32), E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>> + Slice<Range<usize>>, + T: Clone + Offset, + T: InputIter + InputTake, + <T as InputIter>::Item: AsChar + Copy, + T: InputTakeAtPosition + InputLength, + <T as InputTakeAtPosition>::Item: AsChar, + T: for<'a> Compare<&'a [u8]>, + T: AsBytes, +{ + let (i, sign) = sign(input.clone())?; + + //let (i, zeroes) = take_while(|c: <T as InputTakeAtPosition>::Item| c.as_char() == '0')(i)?; + let (i, zeroes) = match i.as_bytes().iter().position(|c| *c != b'0') { + Some(index) => i.take_split(index), + None => i.take_split(i.input_len()), + }; + //let (i, mut integer) = digit0(i)?; + let (i, mut integer) = match i + .as_bytes() + .iter() + .position(|c| !(*c >= b'0' && *c <= b'9')) + { + Some(index) => i.take_split(index), + None => i.take_split(i.input_len()), + }; + + if integer.input_len() == 0 && zeroes.input_len() > 0 { + // keep the last zero if integer is empty + integer = zeroes.slice(zeroes.input_len() - 1..); + } + + let (i, opt_dot) = opt(tag(&b"."[..]))(i)?; + let (i, fraction) = if opt_dot.is_none() { + let i2 = i.clone(); + (i2, i.slice(..0)) + } else { + // match number, trim right zeroes + let mut zero_count = 0usize; + let mut position = None; + for (pos, c) in i.as_bytes().iter().enumerate() { + if *c >= b'0' && *c <= b'9' { + if *c == b'0' { + zero_count += 1; + } else { + zero_count = 0; + } + } else { + position = Some(pos); + break; + } + } + + let position = position.unwrap_or(i.input_len()); + + let index = if zero_count == 0 { + position + } else if zero_count == position { + position - zero_count + 1 + } else { + position - zero_count + }; + + (i.slice(position..), i.slice(..index)) + }; + + if integer.input_len() == 0 && fraction.input_len() == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Float))); + } + + let i2 = i.clone(); + let (i, e) = match i.as_bytes().iter().next() { + Some(b'e') => (i.slice(1..), true), + Some(b'E') => (i.slice(1..), true), + _ => (i, false), + }; + + let (i, exp) = if e { + cut(crate::character::complete::i32)(i)? + } else { + (i2, 0) + }; + + Ok((i, (sign, integer, fraction, exp))) +} + +use crate::traits::ParseTo; + +/// Recognizes floating point number in text format and returns a f32. +/// +/// *Complete version*: Can parse until the end of input. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::float; +/// +/// let parser = |s| { +/// float(s) +/// }; +/// +/// assert_eq!(parser("11e-1"), Ok(("", 1.1))); +/// assert_eq!(parser("123E-02"), Ok(("", 1.23))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", 123.0))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Float)))); +/// ``` +pub fn float<T, E: ParseError<T>>(input: T) -> IResult<T, f32, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>> + Slice<Range<usize>>, + T: Clone + Offset + ParseTo<f32> + Compare<&'static str>, + T: InputIter + InputLength + InputTake, + <T as InputIter>::Item: AsChar + Copy, + <T as InputIter>::IterElem: Clone, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, + T: AsBytes, + T: for<'a> Compare<&'a [u8]>, +{ + /* + let (i, (sign, integer, fraction, exponent)) = recognize_float_parts(input)?; + + let mut float: f32 = minimal_lexical::parse_float( + integer.as_bytes().iter(), + fraction.as_bytes().iter(), + exponent, + ); + if !sign { + float = -float; + } + + Ok((i, float)) + */ + let (i, s) = recognize_float_or_exceptions(input)?; + match s.parse_to() { + Some(f) => Ok((i, f)), + None => Err(crate::Err::Error(E::from_error_kind( + i, + crate::error::ErrorKind::Float, + ))), + } +} + +/// Recognizes floating point number in text format and returns a f64. +/// +/// *Complete version*: Can parse until the end of input. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::double; +/// +/// let parser = |s| { +/// double(s) +/// }; +/// +/// assert_eq!(parser("11e-1"), Ok(("", 1.1))); +/// assert_eq!(parser("123E-02"), Ok(("", 1.23))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", 123.0))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Float)))); +/// ``` +pub fn double<T, E: ParseError<T>>(input: T) -> IResult<T, f64, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>> + Slice<Range<usize>>, + T: Clone + Offset + ParseTo<f64> + Compare<&'static str>, + T: InputIter + InputLength + InputTake, + <T as InputIter>::Item: AsChar + Copy, + <T as InputIter>::IterElem: Clone, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, + T: AsBytes, + T: for<'a> Compare<&'a [u8]>, +{ + /* + let (i, (sign, integer, fraction, exponent)) = recognize_float_parts(input)?; + + let mut float: f64 = minimal_lexical::parse_float( + integer.as_bytes().iter(), + fraction.as_bytes().iter(), + exponent, + ); + if !sign { + float = -float; + } + + Ok((i, float)) + */ + let (i, s) = recognize_float_or_exceptions(input)?; + match s.parse_to() { + Some(f) => Ok((i, f)), + None => Err(crate::Err::Error(E::from_error_kind( + i, + crate::error::ErrorKind::Float, + ))), + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::error::ErrorKind; + use crate::internal::Err; + use proptest::prelude::*; + + macro_rules! assert_parse( + ($left: expr, $right: expr) => { + let res: $crate::IResult<_, _, (_, ErrorKind)> = $left; + assert_eq!(res, $right); + }; + ); + + #[test] + fn i8_tests() { + assert_parse!(i8(&[0x00][..]), Ok((&b""[..], 0))); + assert_parse!(i8(&[0x7f][..]), Ok((&b""[..], 127))); + assert_parse!(i8(&[0xff][..]), Ok((&b""[..], -1))); + assert_parse!(i8(&[0x80][..]), Ok((&b""[..], -128))); + } + + #[test] + fn be_i8_tests() { + assert_parse!(be_i8(&[0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_i8(&[0x7f][..]), Ok((&b""[..], 127))); + assert_parse!(be_i8(&[0xff][..]), Ok((&b""[..], -1))); + assert_parse!(be_i8(&[0x80][..]), Ok((&b""[..], -128))); + } + + #[test] + fn be_i16_tests() { + assert_parse!(be_i16(&[0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_i16(&[0x7f, 0xff][..]), Ok((&b""[..], 32_767_i16))); + assert_parse!(be_i16(&[0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!(be_i16(&[0x80, 0x00][..]), Ok((&b""[..], -32_768_i16))); + } + + #[test] + fn be_u24_tests() { + assert_parse!(be_u24(&[0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_u24(&[0x00, 0xFF, 0xFF][..]), Ok((&b""[..], 65_535_u32))); + assert_parse!( + be_u24(&[0x12, 0x34, 0x56][..]), + Ok((&b""[..], 1_193_046_u32)) + ); + } + + #[test] + fn be_i24_tests() { + assert_parse!(be_i24(&[0xFF, 0xFF, 0xFF][..]), Ok((&b""[..], -1_i32))); + assert_parse!(be_i24(&[0xFF, 0x00, 0x00][..]), Ok((&b""[..], -65_536_i32))); + assert_parse!( + be_i24(&[0xED, 0xCB, 0xAA][..]), + Ok((&b""[..], -1_193_046_i32)) + ); + } + + #[test] + fn be_i32_tests() { + assert_parse!(be_i32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!( + be_i32(&[0x7f, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], 2_147_483_647_i32)) + ); + assert_parse!(be_i32(&[0xff, 0xff, 0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!( + be_i32(&[0x80, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], -2_147_483_648_i32)) + ); + } + + #[test] + fn be_i64_tests() { + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0)) + ); + assert_parse!( + be_i64(&[0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], 9_223_372_036_854_775_807_i64)) + ); + assert_parse!( + be_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], -1)) + ); + assert_parse!( + be_i64(&[0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], -9_223_372_036_854_775_808_i64)) + ); + } + + #[test] + fn be_i128_tests() { + assert_parse!( + be_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok((&b""[..], 0)) + ); + assert_parse!( + be_i128( + &[ + 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok(( + &b""[..], + 170_141_183_460_469_231_731_687_303_715_884_105_727_i128 + )) + ); + assert_parse!( + be_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok((&b""[..], -1)) + ); + assert_parse!( + be_i128( + &[ + 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok(( + &b""[..], + -170_141_183_460_469_231_731_687_303_715_884_105_728_i128 + )) + ); + } + + #[test] + fn le_i8_tests() { + assert_parse!(le_i8(&[0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_i8(&[0x7f][..]), Ok((&b""[..], 127))); + assert_parse!(le_i8(&[0xff][..]), Ok((&b""[..], -1))); + assert_parse!(le_i8(&[0x80][..]), Ok((&b""[..], -128))); + } + + #[test] + fn le_i16_tests() { + assert_parse!(le_i16(&[0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_i16(&[0xff, 0x7f][..]), Ok((&b""[..], 32_767_i16))); + assert_parse!(le_i16(&[0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!(le_i16(&[0x00, 0x80][..]), Ok((&b""[..], -32_768_i16))); + } + + #[test] + fn le_u24_tests() { + assert_parse!(le_u24(&[0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_u24(&[0xFF, 0xFF, 0x00][..]), Ok((&b""[..], 65_535_u32))); + assert_parse!( + le_u24(&[0x56, 0x34, 0x12][..]), + Ok((&b""[..], 1_193_046_u32)) + ); + } + + #[test] + fn le_i24_tests() { + assert_parse!(le_i24(&[0xFF, 0xFF, 0xFF][..]), Ok((&b""[..], -1_i32))); + assert_parse!(le_i24(&[0x00, 0x00, 0xFF][..]), Ok((&b""[..], -65_536_i32))); + assert_parse!( + le_i24(&[0xAA, 0xCB, 0xED][..]), + Ok((&b""[..], -1_193_046_i32)) + ); + } + + #[test] + fn le_i32_tests() { + assert_parse!(le_i32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!( + le_i32(&[0xff, 0xff, 0xff, 0x7f][..]), + Ok((&b""[..], 2_147_483_647_i32)) + ); + assert_parse!(le_i32(&[0xff, 0xff, 0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!( + le_i32(&[0x00, 0x00, 0x00, 0x80][..]), + Ok((&b""[..], -2_147_483_648_i32)) + ); + } + + #[test] + fn le_i64_tests() { + assert_parse!( + le_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0)) + ); + assert_parse!( + le_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f][..]), + Ok((&b""[..], 9_223_372_036_854_775_807_i64)) + ); + assert_parse!( + le_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], -1)) + ); + assert_parse!( + le_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80][..]), + Ok((&b""[..], -9_223_372_036_854_775_808_i64)) + ); + } + + #[test] + fn le_i128_tests() { + assert_parse!( + le_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok((&b""[..], 0)) + ); + assert_parse!( + le_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0x7f + ][..] + ), + Ok(( + &b""[..], + 170_141_183_460_469_231_731_687_303_715_884_105_727_i128 + )) + ); + assert_parse!( + le_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok((&b""[..], -1)) + ); + assert_parse!( + le_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x80 + ][..] + ), + Ok(( + &b""[..], + -170_141_183_460_469_231_731_687_303_715_884_105_728_i128 + )) + ); + } + + #[test] + fn be_f32_tests() { + assert_parse!(be_f32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0_f32))); + assert_parse!( + be_f32(&[0x4d, 0x31, 0x1f, 0xd8][..]), + Ok((&b""[..], 185_728_392_f32)) + ); + } + + #[test] + fn be_f64_tests() { + assert_parse!( + be_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0_f64)) + ); + assert_parse!( + be_f64(&[0x41, 0xa6, 0x23, 0xfb, 0x10, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 185_728_392_f64)) + ); + } + + #[test] + fn le_f32_tests() { + assert_parse!(le_f32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0_f32))); + assert_parse!( + le_f32(&[0xd8, 0x1f, 0x31, 0x4d][..]), + Ok((&b""[..], 185_728_392_f32)) + ); + } + + #[test] + fn le_f64_tests() { + assert_parse!( + le_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0_f64)) + ); + assert_parse!( + le_f64(&[0x00, 0x00, 0x00, 0x10, 0xfb, 0x23, 0xa6, 0x41][..]), + Ok((&b""[..], 185_728_392_f64)) + ); + } + + #[test] + fn hex_u32_tests() { + assert_parse!( + hex_u32(&b";"[..]), + Err(Err::Error(error_position!(&b";"[..], ErrorKind::IsA))) + ); + assert_parse!(hex_u32(&b"ff;"[..]), Ok((&b";"[..], 255))); + assert_parse!(hex_u32(&b"1be2;"[..]), Ok((&b";"[..], 7138))); + assert_parse!(hex_u32(&b"c5a31be2;"[..]), Ok((&b";"[..], 3_315_801_058))); + assert_parse!(hex_u32(&b"C5A31be2;"[..]), Ok((&b";"[..], 3_315_801_058))); + assert_parse!(hex_u32(&b"00c5a31be2;"[..]), Ok((&b"e2;"[..], 12_952_347))); + assert_parse!( + hex_u32(&b"c5a31be201;"[..]), + Ok((&b"01;"[..], 3_315_801_058)) + ); + assert_parse!(hex_u32(&b"ffffffff;"[..]), Ok((&b";"[..], 4_294_967_295))); + assert_parse!(hex_u32(&b"0x1be2;"[..]), Ok((&b"x1be2;"[..], 0))); + assert_parse!(hex_u32(&b"12af"[..]), Ok((&b""[..], 0x12af))); + } + + #[test] + #[cfg(feature = "std")] + fn float_test() { + let mut test_cases = vec![ + "+3.14", + "3.14", + "-3.14", + "0", + "0.0", + "1.", + ".789", + "-.5", + "1e7", + "-1E-7", + ".3e-2", + "1.e4", + "1.2e4", + "12.34", + "-1.234E-12", + "-1.234e-12", + "0.00000000000000000087", + ]; + + for test in test_cases.drain(..) { + let expected32 = str::parse::<f32>(test).unwrap(); + let expected64 = str::parse::<f64>(test).unwrap(); + + println!("now parsing: {} -> {}", test, expected32); + + let larger = format!("{}", test); + assert_parse!(recognize_float(&larger[..]), Ok(("", test))); + + assert_parse!(float(larger.as_bytes()), Ok((&b""[..], expected32))); + assert_parse!(float(&larger[..]), Ok(("", expected32))); + + assert_parse!(double(larger.as_bytes()), Ok((&b""[..], expected64))); + assert_parse!(double(&larger[..]), Ok(("", expected64))); + } + + let remaining_exponent = "-1.234E-"; + assert_parse!( + recognize_float(remaining_exponent), + Err(Err::Failure(("", ErrorKind::Digit))) + ); + + let (_i, nan) = float::<_, ()>("NaN").unwrap(); + assert!(nan.is_nan()); + + let (_i, inf) = float::<_, ()>("inf").unwrap(); + assert!(inf.is_infinite()); + let (_i, inf) = float::<_, ()>("infinite").unwrap(); + assert!(inf.is_infinite()); + } + + #[test] + fn configurable_endianness() { + use crate::number::Endianness; + + fn be_tst16(i: &[u8]) -> IResult<&[u8], u16> { + u16(Endianness::Big)(i) + } + fn le_tst16(i: &[u8]) -> IResult<&[u8], u16> { + u16(Endianness::Little)(i) + } + assert_eq!(be_tst16(&[0x80, 0x00]), Ok((&b""[..], 32_768_u16))); + assert_eq!(le_tst16(&[0x80, 0x00]), Ok((&b""[..], 128_u16))); + + fn be_tst32(i: &[u8]) -> IResult<&[u8], u32> { + u32(Endianness::Big)(i) + } + fn le_tst32(i: &[u8]) -> IResult<&[u8], u32> { + u32(Endianness::Little)(i) + } + assert_eq!( + be_tst32(&[0x12, 0x00, 0x60, 0x00]), + Ok((&b""[..], 302_014_464_u32)) + ); + assert_eq!( + le_tst32(&[0x12, 0x00, 0x60, 0x00]), + Ok((&b""[..], 6_291_474_u32)) + ); + + fn be_tst64(i: &[u8]) -> IResult<&[u8], u64> { + u64(Endianness::Big)(i) + } + fn le_tst64(i: &[u8]) -> IResult<&[u8], u64> { + u64(Endianness::Little)(i) + } + assert_eq!( + be_tst64(&[0x12, 0x00, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 1_297_142_246_100_992_000_u64)) + ); + assert_eq!( + le_tst64(&[0x12, 0x00, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 36_028_874_334_666_770_u64)) + ); + + fn be_tsti16(i: &[u8]) -> IResult<&[u8], i16> { + i16(Endianness::Big)(i) + } + fn le_tsti16(i: &[u8]) -> IResult<&[u8], i16> { + i16(Endianness::Little)(i) + } + assert_eq!(be_tsti16(&[0x00, 0x80]), Ok((&b""[..], 128_i16))); + assert_eq!(le_tsti16(&[0x00, 0x80]), Ok((&b""[..], -32_768_i16))); + + fn be_tsti32(i: &[u8]) -> IResult<&[u8], i32> { + i32(Endianness::Big)(i) + } + fn le_tsti32(i: &[u8]) -> IResult<&[u8], i32> { + i32(Endianness::Little)(i) + } + assert_eq!( + be_tsti32(&[0x00, 0x12, 0x60, 0x00]), + Ok((&b""[..], 1_204_224_i32)) + ); + assert_eq!( + le_tsti32(&[0x00, 0x12, 0x60, 0x00]), + Ok((&b""[..], 6_296_064_i32)) + ); + + fn be_tsti64(i: &[u8]) -> IResult<&[u8], i64> { + i64(Endianness::Big)(i) + } + fn le_tsti64(i: &[u8]) -> IResult<&[u8], i64> { + i64(Endianness::Little)(i) + } + assert_eq!( + be_tsti64(&[0x00, 0xFF, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 71_881_672_479_506_432_i64)) + ); + assert_eq!( + le_tsti64(&[0x00, 0xFF, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 36_028_874_334_732_032_i64)) + ); + } + + #[cfg(feature = "std")] + fn parse_f64(i: &str) -> IResult<&str, f64, ()> { + match recognize_float_or_exceptions(i) { + Err(e) => Err(e), + Ok((i, s)) => { + if s.is_empty() { + return Err(Err::Error(())); + } + match s.parse_to() { + Some(n) => Ok((i, n)), + None => Err(Err::Error(())), + } + } + } + } + + proptest! { + #[test] + #[cfg(feature = "std")] + fn floats(s in "\\PC*") { + println!("testing {}", s); + let res1 = parse_f64(&s); + let res2 = double::<_, ()>(s.as_str()); + assert_eq!(res1, res2); + } + } +} diff --git a/third_party/rust/nom/src/number/mod.rs b/third_party/rust/nom/src/number/mod.rs new file mode 100644 index 0000000000..58c3d51b0b --- /dev/null +++ b/third_party/rust/nom/src/number/mod.rs @@ -0,0 +1,15 @@ +//! Parsers recognizing numbers + +pub mod complete; +pub mod streaming; + +/// Configurable endianness +#[derive(Debug, PartialEq, Eq, Clone, Copy)] +pub enum Endianness { + /// Big endian + Big, + /// Little endian + Little, + /// Will match the host's endianness + Native, +} diff --git a/third_party/rust/nom/src/number/streaming.rs b/third_party/rust/nom/src/number/streaming.rs new file mode 100644 index 0000000000..b4e856d298 --- /dev/null +++ b/third_party/rust/nom/src/number/streaming.rs @@ -0,0 +1,2206 @@ +//! Parsers recognizing numbers, streaming version + +use crate::branch::alt; +use crate::bytes::streaming::tag; +use crate::character::streaming::{char, digit1, sign}; +use crate::combinator::{cut, map, opt, recognize}; +use crate::error::{ErrorKind, ParseError}; +use crate::internal::*; +use crate::lib::std::ops::{RangeFrom, RangeTo}; +use crate::sequence::{pair, tuple}; +use crate::traits::{ + AsBytes, AsChar, Compare, InputIter, InputLength, InputTake, InputTakeAtPosition, Offset, Slice, +}; + +/// Recognizes an unsigned 1 byte integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u8; +/// +/// let parser = |s| { +/// be_u8::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"\x01abcd"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn be_u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(1))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 2 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u16; +/// +/// let parser = |s| { +/// be_u16::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"abcd"[..], 0x0001))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn be_u16<I, E: ParseError<I>>(input: I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 2; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u16; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u16; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 3 byte integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u24; +/// +/// let parser = |s| { +/// be_u24::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02abcd"[..]), Ok((&b"abcd"[..], 0x000102))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn be_u24<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 3; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u32; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u32; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 4 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u32; +/// +/// let parser = |s| { +/// be_u32::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03abcd"[..]), Ok((&b"abcd"[..], 0x00010203))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn be_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 4; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u32; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u32; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 8 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u64; +/// +/// let parser = |s| { +/// be_u64::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn be_u64<I, E: ParseError<I>>(input: I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 8; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u64; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u64; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a big endian unsigned 16 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_u128; +/// +/// let parser = |s| { +/// be_u128::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15abcd"[..]), Ok((&b"abcd"[..], 0x00010203040506070809101112131415))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn be_u128<I, E: ParseError<I>>(input: I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 16; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u128; + for byte in input.iter_elements().take(bound) { + res = (res << 8) + byte as u128; + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a signed 1 byte integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i8; +/// +/// let parser = be_i8::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"\x01abcd"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn be_i8<I, E: ParseError<I>>(input: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u8.map(|x| x as i8).parse(input) +} + +/// Recognizes a big endian signed 2 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i16; +/// +/// let parser = be_i16::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"abcd"[..], 0x0001))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn be_i16<I, E: ParseError<I>>(input: I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u16.map(|x| x as i16).parse(input) +} + +/// Recognizes a big endian signed 3 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i24; +/// +/// let parser = be_i24::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01\x02abcd"[..]), Ok((&b"abcd"[..], 0x000102))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn be_i24<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + // Same as the unsigned version but we need to sign-extend manually here + be_u24 + .map(|x| { + if x & 0x80_00_00 != 0 { + (x | 0xff_00_00_00) as i32 + } else { + x as i32 + } + }) + .parse(input) +} + +/// Recognizes a big endian signed 4 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i32; +/// +/// let parser = be_i32::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03abcd"[..]), Ok((&b"abcd"[..], 0x00010203))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(4)))); +/// ``` +#[inline] +pub fn be_i32<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u32.map(|x| x as i32).parse(input) +} + +/// Recognizes a big endian signed 8 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i64; +/// +/// let parser = be_i64::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0001020304050607))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn be_i64<I, E: ParseError<I>>(input: I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u64.map(|x| x as i64).parse(input) +} + +/// Recognizes a big endian signed 16 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_i128; +/// +/// let parser = be_i128::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15abcd"[..]), Ok((&b"abcd"[..], 0x00010203040506070809101112131415))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn be_i128<I, E: ParseError<I>>(input: I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + be_u128.map(|x| x as i128).parse(input) +} + +/// Recognizes an unsigned 1 byte integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u8; +/// +/// let parser = le_u8::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"\x01abcd"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn le_u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(1))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 2 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u16; +/// +/// let parser = |s| { +/// le_u16::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"abcd"[..], 0x0100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn le_u16<I, E: ParseError<I>>(input: I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 2; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u16; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u16) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 3 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u24; +/// +/// let parser = |s| { +/// le_u24::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02abcd"[..]), Ok((&b"abcd"[..], 0x020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn le_u24<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 3; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u32; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u32) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 4 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u32; +/// +/// let parser = |s| { +/// le_u32::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03abcd"[..]), Ok((&b"abcd"[..], 0x03020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn le_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 4; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u32; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u32) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 8 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u64; +/// +/// let parser = |s| { +/// le_u64::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn le_u64<I, E: ParseError<I>>(input: I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 8; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u64; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u64) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a little endian unsigned 16 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_u128; +/// +/// let parser = |s| { +/// le_u128::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15abcd"[..]), Ok((&b"abcd"[..], 0x15141312111009080706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn le_u128<I, E: ParseError<I>>(input: I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 16; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(bound - input.input_len()))) + } else { + let mut res = 0u128; + for (index, byte) in input.iter_indices().take(bound) { + res += (byte as u128) << (8 * index); + } + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes a signed 1 byte integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i8; +/// +/// let parser = le_i8::<_, (_, ErrorKind)>; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"\x01abcd"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn le_i8<I, E: ParseError<I>>(input: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u8.map(|x| x as i8).parse(input) +} + +/// Recognizes a little endian signed 2 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i16; +/// +/// let parser = |s| { +/// le_i16::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01abcd"[..]), Ok((&b"abcd"[..], 0x0100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn le_i16<I, E: ParseError<I>>(input: I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u16.map(|x| x as i16).parse(input) +} + +/// Recognizes a little endian signed 3 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i24; +/// +/// let parser = |s| { +/// le_i24::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02abcd"[..]), Ok((&b"abcd"[..], 0x020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn le_i24<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + // Same as the unsigned version but we need to sign-extend manually here + le_u24 + .map(|x| { + if x & 0x80_00_00 != 0 { + (x | 0xff_00_00_00) as i32 + } else { + x as i32 + } + }) + .parse(input) +} + +/// Recognizes a little endian signed 4 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i32; +/// +/// let parser = |s| { +/// le_i32::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03abcd"[..]), Ok((&b"abcd"[..], 0x03020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn le_i32<I, E: ParseError<I>>(input: I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u32.map(|x| x as i32).parse(input) +} + +/// Recognizes a little endian signed 8 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i64; +/// +/// let parser = |s| { +/// le_i64::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn le_i64<I, E: ParseError<I>>(input: I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u64.map(|x| x as i64).parse(input) +} + +/// Recognizes a little endian signed 16 bytes integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_i128; +/// +/// let parser = |s| { +/// le_i128::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15abcd"[..]), Ok((&b"abcd"[..], 0x15141312111009080706050403020100))); +/// assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn le_i128<I, E: ParseError<I>>(input: I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + le_u128.map(|x| x as i128).parse(input) +} + +/// Recognizes an unsigned 1 byte integer +/// +/// Note that endianness does not apply to 1 byte numbers. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u8; +/// +/// let parser = |s| { +/// u8::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + let bound: usize = 1; + if input.input_len() < bound { + Err(Err::Incomplete(Needed::new(1))) + } else { + let res = input.iter_elements().next().unwrap(); + + Ok((input.slice(bound..), res)) + } +} + +/// Recognizes an unsigned 2 bytes integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u16 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u16 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u16; +/// +/// let be_u16 = |s| { +/// u16::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(be_u16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// +/// let le_u16 = |s| { +/// u16::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(le_u16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn u16<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u16, + crate::number::Endianness::Little => le_u16, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u16, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u16, + } +} + +/// Recognizes an unsigned 3 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u24 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u24 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u24; +/// +/// let be_u24 = |s| { +/// u24::<_,(_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(be_u24(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// +/// let le_u24 = |s| { +/// u24::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(le_u24(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn u24<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u24, + crate::number::Endianness::Little => le_u24, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u24, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u24, + } +} + +/// Recognizes an unsigned 4 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u32 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u32 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u32; +/// +/// let be_u32 = |s| { +/// u32::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(be_u32(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// +/// let le_u32 = |s| { +/// u32::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(le_u32(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn u32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u32, + crate::number::Endianness::Little => le_u32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u32, + } +} + +/// Recognizes an unsigned 8 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u64 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u64 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u64; +/// +/// let be_u64 = |s| { +/// u64::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(be_u64(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// +/// let le_u64 = |s| { +/// u64::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(le_u64(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn u64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u64, + crate::number::Endianness::Little => le_u64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u64, + } +} + +/// Recognizes an unsigned 16 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian u128 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian u128 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::u128; +/// +/// let be_u128 = |s| { +/// u128::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(be_u128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// +/// let le_u128 = |s| { +/// u128::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(le_u128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn u128<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, u128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_u128, + crate::number::Endianness::Little => le_u128, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_u128, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_u128, + } +} + +/// Recognizes a signed 1 byte integer +/// +/// Note that endianness does not apply to 1 byte numbers. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i8; +/// +/// let parser = |s| { +/// i8::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00))); +/// assert_eq!(parser(&b""[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn i8<I, E: ParseError<I>>(i: I) -> IResult<I, i8, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + u8.map(|x| x as i8).parse(i) +} + +/// Recognizes a signed 2 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i16 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i16 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i16; +/// +/// let be_i16 = |s| { +/// i16::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003))); +/// assert_eq!(be_i16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// +/// let le_i16 = |s| { +/// i16::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300))); +/// assert_eq!(le_i16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn i16<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i16, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i16, + crate::number::Endianness::Little => le_i16, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i16, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i16, + } +} + +/// Recognizes a signed 3 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i24 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i24 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i24; +/// +/// let be_i24 = |s| { +/// i24::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x000305))); +/// assert_eq!(be_i24(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// +/// let le_i24 = |s| { +/// i24::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i24(&b"\x00\x03\x05abcefg"[..]), Ok((&b"abcefg"[..], 0x050300))); +/// assert_eq!(le_i24(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(2)))); +/// ``` +#[inline] +pub fn i24<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i24, + crate::number::Endianness::Little => le_i24, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i24, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i24, + } +} + +/// Recognizes a signed 4 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i32 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i32 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i32; +/// +/// let be_i32 = |s| { +/// i32::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507))); +/// assert_eq!(be_i32(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// +/// let le_i32 = |s| { +/// i32::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i32(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07050300))); +/// assert_eq!(le_i32(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn i32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i32, + crate::number::Endianness::Little => le_i32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i32, + } +} + +/// Recognizes a signed 8 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i64 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i64 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i64; +/// +/// let be_i64 = |s| { +/// i64::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0001020304050607))); +/// assert_eq!(be_i64(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// +/// let le_i64 = |s| { +/// i64::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i64(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100))); +/// assert_eq!(le_i64(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn i64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i64, + crate::number::Endianness::Little => le_i64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i64, + } +} + +/// Recognizes a signed 16 byte integer +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian i128 integer, +/// otherwise if `nom::number::Endianness::Little` parse a little endian i128 integer. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::i128; +/// +/// let be_i128 = |s| { +/// i128::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_i128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607))); +/// assert_eq!(be_i128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// +/// let le_i128 = |s| { +/// i128::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_i128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100))); +/// assert_eq!(le_i128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15)))); +/// ``` +#[inline] +pub fn i128<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, i128, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_i128, + crate::number::Endianness::Little => le_i128, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_i128, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_i128, + } +} + +/// Recognizes a big endian 4 bytes floating point number. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_f32; +/// +/// let parser = |s| { +/// be_f32::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00][..]), Ok((&b""[..], 2.640625))); +/// assert_eq!(parser(&[0x01][..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn be_f32<I, E: ParseError<I>>(input: I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match be_u32(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f32::from_bits(o))), + } +} + +/// Recognizes a big endian 8 bytes floating point number. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::be_f64; +/// +/// let parser = |s| { +/// be_f64::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&[0x01][..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn be_f64<I, E: ParseError<I>>(input: I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match be_u64(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f64::from_bits(o))), + } +} + +/// Recognizes a little endian 4 bytes floating point number. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_f32; +/// +/// let parser = |s| { +/// le_f32::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&[0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(parser(&[0x01][..]), Err(Err::Incomplete(Needed::new(3)))); +/// ``` +#[inline] +pub fn le_f32<I, E: ParseError<I>>(input: I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match le_u32(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f32::from_bits(o))), + } +} + +/// Recognizes a little endian 8 bytes floating point number. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::le_f64; +/// +/// let parser = |s| { +/// le_f64::<_, (_, ErrorKind)>(s) +/// }; +/// +/// assert_eq!(parser(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 3145728.0))); +/// assert_eq!(parser(&[0x01][..]), Err(Err::Incomplete(Needed::new(7)))); +/// ``` +#[inline] +pub fn le_f64<I, E: ParseError<I>>(input: I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match le_u64(input) { + Err(e) => Err(e), + Ok((i, o)) => Ok((i, f64::from_bits(o))), + } +} + +/// Recognizes a 4 byte floating point number +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian f32 float, +/// otherwise if `nom::number::Endianness::Little` parse a little endian f32 float. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::f32; +/// +/// let be_f32 = |s| { +/// f32::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_f32(&[0x41, 0x48, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(be_f32(&b"abc"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// +/// let le_f32 = |s| { +/// f32::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_f32(&[0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(le_f32(&b"abc"[..]), Err(Err::Incomplete(Needed::new(1)))); +/// ``` +#[inline] +pub fn f32<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, f32, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_f32, + crate::number::Endianness::Little => le_f32, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_f32, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_f32, + } +} + +/// Recognizes an 8 byte floating point number +/// +/// If the parameter is `nom::number::Endianness::Big`, parse a big endian f64 float, +/// otherwise if `nom::number::Endianness::Little` parse a little endian f64 float. +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::streaming::f64; +/// +/// let be_f64 = |s| { +/// f64::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s) +/// }; +/// +/// assert_eq!(be_f64(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(be_f64(&b"abc"[..]), Err(Err::Incomplete(Needed::new(5)))); +/// +/// let le_f64 = |s| { +/// f64::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s) +/// }; +/// +/// assert_eq!(le_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40][..]), Ok((&b""[..], 12.5))); +/// assert_eq!(le_f64(&b"abc"[..]), Err(Err::Incomplete(Needed::new(5)))); +/// ``` +#[inline] +pub fn f64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(I) -> IResult<I, f64, E> +where + I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength, +{ + match endian { + crate::number::Endianness::Big => be_f64, + crate::number::Endianness::Little => le_f64, + #[cfg(target_endian = "big")] + crate::number::Endianness::Native => be_f64, + #[cfg(target_endian = "little")] + crate::number::Endianness::Native => le_f64, + } +} + +/// Recognizes a hex-encoded integer. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::hex_u32; +/// +/// let parser = |s| { +/// hex_u32(s) +/// }; +/// +/// assert_eq!(parser(b"01AE;"), Ok((&b";"[..], 0x01AE))); +/// assert_eq!(parser(b"abc"), Err(Err::Incomplete(Needed::new(1)))); +/// assert_eq!(parser(b"ggg"), Err(Err::Error((&b"ggg"[..], ErrorKind::IsA)))); +/// ``` +#[inline] +pub fn hex_u32<'a, E: ParseError<&'a [u8]>>(input: &'a [u8]) -> IResult<&'a [u8], u32, E> { + let (i, o) = crate::bytes::streaming::is_a(&b"0123456789abcdefABCDEF"[..])(input)?; + + // Do not parse more than 8 characters for a u32 + let (parsed, remaining) = if o.len() <= 8 { + (o, i) + } else { + (&input[..8], &input[8..]) + }; + + let res = parsed + .iter() + .rev() + .enumerate() + .map(|(k, &v)| { + let digit = v as char; + digit.to_digit(16).unwrap_or(0) << (k * 4) + }) + .sum(); + + Ok((remaining, res)) +} + +/// Recognizes a floating point number in text format and returns the corresponding part of the input. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if it reaches the end of input. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// use nom::number::streaming::recognize_float; +/// +/// let parser = |s| { +/// recognize_float(s) +/// }; +/// +/// assert_eq!(parser("11e-1;"), Ok((";", "11e-1"))); +/// assert_eq!(parser("123E-02;"), Ok((";", "123E-02"))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", "123"))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Char)))); +/// ``` +#[rustfmt::skip] +pub fn recognize_float<T, E:ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter, + <T as InputIter>::Item: AsChar, + T: InputTakeAtPosition + InputLength, + <T as InputTakeAtPosition>::Item: AsChar +{ + recognize( + tuple(( + opt(alt((char('+'), char('-')))), + alt(( + map(tuple((digit1, opt(pair(char('.'), opt(digit1))))), |_| ()), + map(tuple((char('.'), digit1)), |_| ()) + )), + opt(tuple(( + alt((char('e'), char('E'))), + opt(alt((char('+'), char('-')))), + cut(digit1) + ))) + )) + )(input) +} + +// workaround until issues with minimal-lexical are fixed +#[doc(hidden)] +pub fn recognize_float_or_exceptions<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter + InputTake + InputLength + Compare<&'static str>, + <T as InputIter>::Item: AsChar, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, +{ + alt(( + |i: T| { + recognize_float::<_, E>(i.clone()).map_err(|e| match e { + crate::Err::Error(_) => crate::Err::Error(E::from_error_kind(i, ErrorKind::Float)), + crate::Err::Failure(_) => crate::Err::Failure(E::from_error_kind(i, ErrorKind::Float)), + crate::Err::Incomplete(needed) => crate::Err::Incomplete(needed), + }) + }, + |i: T| { + crate::bytes::streaming::tag_no_case::<_, _, E>("nan")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + |i: T| { + crate::bytes::streaming::tag_no_case::<_, _, E>("inf")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + |i: T| { + crate::bytes::streaming::tag_no_case::<_, _, E>("infinity")(i.clone()) + .map_err(|_| crate::Err::Error(E::from_error_kind(i, ErrorKind::Float))) + }, + ))(input) +} + +/// Recognizes a floating point number in text format +/// +/// It returns a tuple of (`sign`, `integer part`, `fraction part` and `exponent`) of the input +/// data. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +pub fn recognize_float_parts<T, E: ParseError<T>>(input: T) -> IResult<T, (bool, T, T, i32), E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter + crate::traits::ParseTo<i32>, + <T as InputIter>::Item: AsChar, + T: InputTakeAtPosition + InputTake + InputLength, + <T as InputTakeAtPosition>::Item: AsChar, + T: for<'a> Compare<&'a [u8]>, + T: AsBytes, +{ + let (i, sign) = sign(input.clone())?; + + //let (i, zeroes) = take_while(|c: <T as InputTakeAtPosition>::Item| c.as_char() == '0')(i)?; + let (i, zeroes) = match i.as_bytes().iter().position(|c| *c != b'0') { + Some(index) => i.take_split(index), + None => i.take_split(i.input_len()), + }; + + //let (i, mut integer) = digit0(i)?; + let (i, mut integer) = match i + .as_bytes() + .iter() + .position(|c| !(*c >= b'0' && *c <= b'9')) + { + Some(index) => i.take_split(index), + None => i.take_split(i.input_len()), + }; + + if integer.input_len() == 0 && zeroes.input_len() > 0 { + // keep the last zero if integer is empty + integer = zeroes.slice(zeroes.input_len() - 1..); + } + + let (i, opt_dot) = opt(tag(&b"."[..]))(i)?; + let (i, fraction) = if opt_dot.is_none() { + let i2 = i.clone(); + (i2, i.slice(..0)) + } else { + // match number, trim right zeroes + let mut zero_count = 0usize; + let mut position = None; + for (pos, c) in i.as_bytes().iter().enumerate() { + if *c >= b'0' && *c <= b'9' { + if *c == b'0' { + zero_count += 1; + } else { + zero_count = 0; + } + } else { + position = Some(pos); + break; + } + } + + let position = match position { + Some(p) => p, + None => return Err(Err::Incomplete(Needed::new(1))), + }; + + let index = if zero_count == 0 { + position + } else if zero_count == position { + position - zero_count + 1 + } else { + position - zero_count + }; + + (i.slice(position..), i.slice(..index)) + }; + + if integer.input_len() == 0 && fraction.input_len() == 0 { + return Err(Err::Error(E::from_error_kind(input, ErrorKind::Float))); + } + + let i2 = i.clone(); + let (i, e) = match i.as_bytes().iter().next() { + Some(b'e') => (i.slice(1..), true), + Some(b'E') => (i.slice(1..), true), + _ => (i, false), + }; + + let (i, exp) = if e { + cut(crate::character::streaming::i32)(i)? + } else { + (i2, 0) + }; + + Ok((i, (sign, integer, fraction, exp))) +} + +/// Recognizes floating point number in text format and returns a f32. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::float; +/// +/// let parser = |s| { +/// float(s) +/// }; +/// +/// assert_eq!(parser("11e-1"), Ok(("", 1.1))); +/// assert_eq!(parser("123E-02"), Ok(("", 1.23))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", 123.0))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Float)))); +/// ``` +pub fn float<T, E: ParseError<T>>(input: T) -> IResult<T, f32, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter + InputLength + InputTake + crate::traits::ParseTo<f32> + Compare<&'static str>, + <T as InputIter>::Item: AsChar, + <T as InputIter>::IterElem: Clone, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, + T: AsBytes, + T: for<'a> Compare<&'a [u8]>, +{ + /* + let (i, (sign, integer, fraction, exponent)) = recognize_float_parts(input)?; + + let mut float: f32 = minimal_lexical::parse_float( + integer.as_bytes().iter(), + fraction.as_bytes().iter(), + exponent, + ); + if !sign { + float = -float; + } + + Ok((i, float)) + */ + let (i, s) = recognize_float_or_exceptions(input)?; + match s.parse_to() { + Some(f) => Ok((i, f)), + None => Err(crate::Err::Error(E::from_error_kind( + i, + crate::error::ErrorKind::Float, + ))), + } +} + +/// Recognizes floating point number in text format and returns a f64. +/// +/// *Streaming version*: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::number::complete::double; +/// +/// let parser = |s| { +/// double(s) +/// }; +/// +/// assert_eq!(parser("11e-1"), Ok(("", 1.1))); +/// assert_eq!(parser("123E-02"), Ok(("", 1.23))); +/// assert_eq!(parser("123K-01"), Ok(("K-01", 123.0))); +/// assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Float)))); +/// ``` +pub fn double<T, E: ParseError<T>>(input: T) -> IResult<T, f64, E> +where + T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>, + T: Clone + Offset, + T: InputIter + InputLength + InputTake + crate::traits::ParseTo<f64> + Compare<&'static str>, + <T as InputIter>::Item: AsChar, + <T as InputIter>::IterElem: Clone, + T: InputTakeAtPosition, + <T as InputTakeAtPosition>::Item: AsChar, + T: AsBytes, + T: for<'a> Compare<&'a [u8]>, +{ + /* + let (i, (sign, integer, fraction, exponent)) = recognize_float_parts(input)?; + + let mut float: f64 = minimal_lexical::parse_float( + integer.as_bytes().iter(), + fraction.as_bytes().iter(), + exponent, + ); + if !sign { + float = -float; + } + + Ok((i, float)) + */ + let (i, s) = recognize_float_or_exceptions(input)?; + match s.parse_to() { + Some(f) => Ok((i, f)), + None => Err(crate::Err::Error(E::from_error_kind( + i, + crate::error::ErrorKind::Float, + ))), + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::error::ErrorKind; + use crate::internal::{Err, Needed}; + use proptest::prelude::*; + + macro_rules! assert_parse( + ($left: expr, $right: expr) => { + let res: $crate::IResult<_, _, (_, ErrorKind)> = $left; + assert_eq!(res, $right); + }; + ); + + #[test] + fn i8_tests() { + assert_parse!(be_i8(&[0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_i8(&[0x7f][..]), Ok((&b""[..], 127))); + assert_parse!(be_i8(&[0xff][..]), Ok((&b""[..], -1))); + assert_parse!(be_i8(&[0x80][..]), Ok((&b""[..], -128))); + assert_parse!(be_i8(&[][..]), Err(Err::Incomplete(Needed::new(1)))); + } + + #[test] + fn i16_tests() { + assert_parse!(be_i16(&[0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_i16(&[0x7f, 0xff][..]), Ok((&b""[..], 32_767_i16))); + assert_parse!(be_i16(&[0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!(be_i16(&[0x80, 0x00][..]), Ok((&b""[..], -32_768_i16))); + assert_parse!(be_i16(&[][..]), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!(be_i16(&[0x00][..]), Err(Err::Incomplete(Needed::new(1)))); + } + + #[test] + fn u24_tests() { + assert_parse!(be_u24(&[0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(be_u24(&[0x00, 0xFF, 0xFF][..]), Ok((&b""[..], 65_535_u32))); + assert_parse!( + be_u24(&[0x12, 0x34, 0x56][..]), + Ok((&b""[..], 1_193_046_u32)) + ); + assert_parse!(be_u24(&[][..]), Err(Err::Incomplete(Needed::new(3)))); + assert_parse!(be_u24(&[0x00][..]), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!( + be_u24(&[0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + #[test] + fn i24_tests() { + assert_parse!(be_i24(&[0xFF, 0xFF, 0xFF][..]), Ok((&b""[..], -1_i32))); + assert_parse!(be_i24(&[0xFF, 0x00, 0x00][..]), Ok((&b""[..], -65_536_i32))); + assert_parse!( + be_i24(&[0xED, 0xCB, 0xAA][..]), + Ok((&b""[..], -1_193_046_i32)) + ); + assert_parse!(be_i24(&[][..]), Err(Err::Incomplete(Needed::new(3)))); + assert_parse!(be_i24(&[0x00][..]), Err(Err::Incomplete(Needed::new(2)))); + assert_parse!( + be_i24(&[0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + #[test] + fn i32_tests() { + assert_parse!(be_i32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!( + be_i32(&[0x7f, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], 2_147_483_647_i32)) + ); + assert_parse!(be_i32(&[0xff, 0xff, 0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!( + be_i32(&[0x80, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], -2_147_483_648_i32)) + ); + assert_parse!(be_i32(&[][..]), Err(Err::Incomplete(Needed::new(4)))); + assert_parse!(be_i32(&[0x00][..]), Err(Err::Incomplete(Needed::new(3)))); + assert_parse!( + be_i32(&[0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_parse!( + be_i32(&[0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + #[test] + fn i64_tests() { + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0)) + ); + assert_parse!( + be_i64(&[0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], 9_223_372_036_854_775_807_i64)) + ); + assert_parse!( + be_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], -1)) + ); + assert_parse!( + be_i64(&[0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], -9_223_372_036_854_775_808_i64)) + ); + assert_parse!(be_i64(&[][..]), Err(Err::Incomplete(Needed::new(8)))); + assert_parse!(be_i64(&[0x00][..]), Err(Err::Incomplete(Needed::new(7)))); + assert_parse!( + be_i64(&[0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(6))) + ); + assert_parse!( + be_i64(&[0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(5))) + ); + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(4))) + ); + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(3))) + ); + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_parse!( + be_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + #[test] + fn i128_tests() { + assert_parse!( + be_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok((&b""[..], 0)) + ); + assert_parse!( + be_i128( + &[ + 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok(( + &b""[..], + 170_141_183_460_469_231_731_687_303_715_884_105_727_i128 + )) + ); + assert_parse!( + be_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok((&b""[..], -1)) + ); + assert_parse!( + be_i128( + &[ + 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok(( + &b""[..], + -170_141_183_460_469_231_731_687_303_715_884_105_728_i128 + )) + ); + assert_parse!(be_i128(&[][..]), Err(Err::Incomplete(Needed::new(16)))); + assert_parse!(be_i128(&[0x00][..]), Err(Err::Incomplete(Needed::new(15)))); + assert_parse!( + be_i128(&[0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(14))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(13))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(12))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(11))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(10))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(9))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(8))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(7))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(6))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(5))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(4))) + ); + assert_parse!( + be_i128(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Err(Err::Incomplete(Needed::new(3))) + ); + assert_parse!( + be_i128( + &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..] + ), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_parse!( + be_i128( + &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] + [..] + ), + Err(Err::Incomplete(Needed::new(1))) + ); + } + + #[test] + fn le_i8_tests() { + assert_parse!(le_i8(&[0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_i8(&[0x7f][..]), Ok((&b""[..], 127))); + assert_parse!(le_i8(&[0xff][..]), Ok((&b""[..], -1))); + assert_parse!(le_i8(&[0x80][..]), Ok((&b""[..], -128))); + } + + #[test] + fn le_i16_tests() { + assert_parse!(le_i16(&[0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_i16(&[0xff, 0x7f][..]), Ok((&b""[..], 32_767_i16))); + assert_parse!(le_i16(&[0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!(le_i16(&[0x00, 0x80][..]), Ok((&b""[..], -32_768_i16))); + } + + #[test] + fn le_u24_tests() { + assert_parse!(le_u24(&[0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!(le_u24(&[0xFF, 0xFF, 0x00][..]), Ok((&b""[..], 65_535_u32))); + assert_parse!( + le_u24(&[0x56, 0x34, 0x12][..]), + Ok((&b""[..], 1_193_046_u32)) + ); + } + + #[test] + fn le_i24_tests() { + assert_parse!(le_i24(&[0xFF, 0xFF, 0xFF][..]), Ok((&b""[..], -1_i32))); + assert_parse!(le_i24(&[0x00, 0x00, 0xFF][..]), Ok((&b""[..], -65_536_i32))); + assert_parse!( + le_i24(&[0xAA, 0xCB, 0xED][..]), + Ok((&b""[..], -1_193_046_i32)) + ); + } + + #[test] + fn le_i32_tests() { + assert_parse!(le_i32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0))); + assert_parse!( + le_i32(&[0xff, 0xff, 0xff, 0x7f][..]), + Ok((&b""[..], 2_147_483_647_i32)) + ); + assert_parse!(le_i32(&[0xff, 0xff, 0xff, 0xff][..]), Ok((&b""[..], -1))); + assert_parse!( + le_i32(&[0x00, 0x00, 0x00, 0x80][..]), + Ok((&b""[..], -2_147_483_648_i32)) + ); + } + + #[test] + fn le_i64_tests() { + assert_parse!( + le_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0)) + ); + assert_parse!( + le_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f][..]), + Ok((&b""[..], 9_223_372_036_854_775_807_i64)) + ); + assert_parse!( + le_i64(&[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff][..]), + Ok((&b""[..], -1)) + ); + assert_parse!( + le_i64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80][..]), + Ok((&b""[..], -9_223_372_036_854_775_808_i64)) + ); + } + + #[test] + fn le_i128_tests() { + assert_parse!( + le_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 + ][..] + ), + Ok((&b""[..], 0)) + ); + assert_parse!( + le_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0x7f + ][..] + ), + Ok(( + &b""[..], + 170_141_183_460_469_231_731_687_303_715_884_105_727_i128 + )) + ); + assert_parse!( + le_i128( + &[ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff + ][..] + ), + Ok((&b""[..], -1)) + ); + assert_parse!( + le_i128( + &[ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x80 + ][..] + ), + Ok(( + &b""[..], + -170_141_183_460_469_231_731_687_303_715_884_105_728_i128 + )) + ); + } + + #[test] + fn be_f32_tests() { + assert_parse!(be_f32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0_f32))); + assert_parse!( + be_f32(&[0x4d, 0x31, 0x1f, 0xd8][..]), + Ok((&b""[..], 185_728_392_f32)) + ); + } + + #[test] + fn be_f64_tests() { + assert_parse!( + be_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0_f64)) + ); + assert_parse!( + be_f64(&[0x41, 0xa6, 0x23, 0xfb, 0x10, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 185_728_392_f64)) + ); + } + + #[test] + fn le_f32_tests() { + assert_parse!(le_f32(&[0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 0_f32))); + assert_parse!( + le_f32(&[0xd8, 0x1f, 0x31, 0x4d][..]), + Ok((&b""[..], 185_728_392_f32)) + ); + } + + #[test] + fn le_f64_tests() { + assert_parse!( + le_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), + Ok((&b""[..], 0_f64)) + ); + assert_parse!( + le_f64(&[0x00, 0x00, 0x00, 0x10, 0xfb, 0x23, 0xa6, 0x41][..]), + Ok((&b""[..], 185_728_392_f64)) + ); + } + + #[test] + fn hex_u32_tests() { + assert_parse!( + hex_u32(&b";"[..]), + Err(Err::Error(error_position!(&b";"[..], ErrorKind::IsA))) + ); + assert_parse!(hex_u32(&b"ff;"[..]), Ok((&b";"[..], 255))); + assert_parse!(hex_u32(&b"1be2;"[..]), Ok((&b";"[..], 7138))); + assert_parse!(hex_u32(&b"c5a31be2;"[..]), Ok((&b";"[..], 3_315_801_058))); + assert_parse!(hex_u32(&b"C5A31be2;"[..]), Ok((&b";"[..], 3_315_801_058))); + assert_parse!(hex_u32(&b"00c5a31be2;"[..]), Ok((&b"e2;"[..], 12_952_347))); + assert_parse!( + hex_u32(&b"c5a31be201;"[..]), + Ok((&b"01;"[..], 3_315_801_058)) + ); + assert_parse!(hex_u32(&b"ffffffff;"[..]), Ok((&b";"[..], 4_294_967_295))); + assert_parse!(hex_u32(&b"0x1be2;"[..]), Ok((&b"x1be2;"[..], 0))); + assert_parse!(hex_u32(&b"12af"[..]), Err(Err::Incomplete(Needed::new(1)))); + } + + #[test] + #[cfg(feature = "std")] + fn float_test() { + let mut test_cases = vec![ + "+3.14", + "3.14", + "-3.14", + "0", + "0.0", + "1.", + ".789", + "-.5", + "1e7", + "-1E-7", + ".3e-2", + "1.e4", + "1.2e4", + "12.34", + "-1.234E-12", + "-1.234e-12", + "0.00000000000000000087", + ]; + + for test in test_cases.drain(..) { + let expected32 = str::parse::<f32>(test).unwrap(); + let expected64 = str::parse::<f64>(test).unwrap(); + + println!("now parsing: {} -> {}", test, expected32); + + let larger = format!("{};", test); + assert_parse!(recognize_float(&larger[..]), Ok((";", test))); + + assert_parse!(float(larger.as_bytes()), Ok((&b";"[..], expected32))); + assert_parse!(float(&larger[..]), Ok((";", expected32))); + + assert_parse!(double(larger.as_bytes()), Ok((&b";"[..], expected64))); + assert_parse!(double(&larger[..]), Ok((";", expected64))); + } + + let remaining_exponent = "-1.234E-"; + assert_parse!( + recognize_float(remaining_exponent), + Err(Err::Incomplete(Needed::new(1))) + ); + + let (_i, nan) = float::<_, ()>("NaN").unwrap(); + assert!(nan.is_nan()); + + let (_i, inf) = float::<_, ()>("inf").unwrap(); + assert!(inf.is_infinite()); + let (_i, inf) = float::<_, ()>("infinite").unwrap(); + assert!(inf.is_infinite()); + } + + #[test] + fn configurable_endianness() { + use crate::number::Endianness; + + fn be_tst16(i: &[u8]) -> IResult<&[u8], u16> { + u16(Endianness::Big)(i) + } + fn le_tst16(i: &[u8]) -> IResult<&[u8], u16> { + u16(Endianness::Little)(i) + } + assert_eq!(be_tst16(&[0x80, 0x00]), Ok((&b""[..], 32_768_u16))); + assert_eq!(le_tst16(&[0x80, 0x00]), Ok((&b""[..], 128_u16))); + + fn be_tst32(i: &[u8]) -> IResult<&[u8], u32> { + u32(Endianness::Big)(i) + } + fn le_tst32(i: &[u8]) -> IResult<&[u8], u32> { + u32(Endianness::Little)(i) + } + assert_eq!( + be_tst32(&[0x12, 0x00, 0x60, 0x00]), + Ok((&b""[..], 302_014_464_u32)) + ); + assert_eq!( + le_tst32(&[0x12, 0x00, 0x60, 0x00]), + Ok((&b""[..], 6_291_474_u32)) + ); + + fn be_tst64(i: &[u8]) -> IResult<&[u8], u64> { + u64(Endianness::Big)(i) + } + fn le_tst64(i: &[u8]) -> IResult<&[u8], u64> { + u64(Endianness::Little)(i) + } + assert_eq!( + be_tst64(&[0x12, 0x00, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 1_297_142_246_100_992_000_u64)) + ); + assert_eq!( + le_tst64(&[0x12, 0x00, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 36_028_874_334_666_770_u64)) + ); + + fn be_tsti16(i: &[u8]) -> IResult<&[u8], i16> { + i16(Endianness::Big)(i) + } + fn le_tsti16(i: &[u8]) -> IResult<&[u8], i16> { + i16(Endianness::Little)(i) + } + assert_eq!(be_tsti16(&[0x00, 0x80]), Ok((&b""[..], 128_i16))); + assert_eq!(le_tsti16(&[0x00, 0x80]), Ok((&b""[..], -32_768_i16))); + + fn be_tsti32(i: &[u8]) -> IResult<&[u8], i32> { + i32(Endianness::Big)(i) + } + fn le_tsti32(i: &[u8]) -> IResult<&[u8], i32> { + i32(Endianness::Little)(i) + } + assert_eq!( + be_tsti32(&[0x00, 0x12, 0x60, 0x00]), + Ok((&b""[..], 1_204_224_i32)) + ); + assert_eq!( + le_tsti32(&[0x00, 0x12, 0x60, 0x00]), + Ok((&b""[..], 6_296_064_i32)) + ); + + fn be_tsti64(i: &[u8]) -> IResult<&[u8], i64> { + i64(Endianness::Big)(i) + } + fn le_tsti64(i: &[u8]) -> IResult<&[u8], i64> { + i64(Endianness::Little)(i) + } + assert_eq!( + be_tsti64(&[0x00, 0xFF, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 71_881_672_479_506_432_i64)) + ); + assert_eq!( + le_tsti64(&[0x00, 0xFF, 0x60, 0x00, 0x12, 0x00, 0x80, 0x00]), + Ok((&b""[..], 36_028_874_334_732_032_i64)) + ); + } + + #[cfg(feature = "std")] + fn parse_f64(i: &str) -> IResult<&str, f64, ()> { + use crate::traits::ParseTo; + match recognize_float_or_exceptions(i) { + Err(e) => Err(e), + Ok((i, s)) => { + if s.is_empty() { + return Err(Err::Error(())); + } + match s.parse_to() { + Some(n) => Ok((i, n)), + None => Err(Err::Error(())), + } + } + } + } + + proptest! { + #[test] + #[cfg(feature = "std")] + fn floats(s in "\\PC*") { + println!("testing {}", s); + let res1 = parse_f64(&s); + let res2 = double::<_, ()>(s.as_str()); + assert_eq!(res1, res2); + } + } +} diff --git a/third_party/rust/nom/src/sequence/mod.rs b/third_party/rust/nom/src/sequence/mod.rs new file mode 100644 index 0000000000..735ab45cc7 --- /dev/null +++ b/third_party/rust/nom/src/sequence/mod.rs @@ -0,0 +1,279 @@ +//! Combinators applying parsers in sequence + +#[cfg(test)] +mod tests; + +use crate::error::ParseError; +use crate::internal::{IResult, Parser}; + +/// Gets an object from the first parser, +/// then gets another object from the second parser. +/// +/// # Arguments +/// * `first` The first parser to apply. +/// * `second` The second parser to apply. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::sequence::pair; +/// use nom::bytes::complete::tag; +/// +/// let mut parser = pair(tag("abc"), tag("efg")); +/// +/// assert_eq!(parser("abcefg"), Ok(("", ("abc", "efg")))); +/// assert_eq!(parser("abcefghij"), Ok(("hij", ("abc", "efg")))); +/// assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag)))); +/// assert_eq!(parser("123"), Err(Err::Error(("123", ErrorKind::Tag)))); +/// ``` +pub fn pair<I, O1, O2, E: ParseError<I>, F, G>( + mut first: F, + mut second: G, +) -> impl FnMut(I) -> IResult<I, (O1, O2), E> +where + F: Parser<I, O1, E>, + G: Parser<I, O2, E>, +{ + move |input: I| { + let (input, o1) = first.parse(input)?; + second.parse(input).map(|(i, o2)| (i, (o1, o2))) + } +} + +/// Matches an object from the first parser and discards it, +/// then gets an object from the second parser. +/// +/// # Arguments +/// * `first` The opening parser. +/// * `second` The second parser to get object. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::sequence::preceded; +/// use nom::bytes::complete::tag; +/// +/// let mut parser = preceded(tag("abc"), tag("efg")); +/// +/// assert_eq!(parser("abcefg"), Ok(("", "efg"))); +/// assert_eq!(parser("abcefghij"), Ok(("hij", "efg"))); +/// assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag)))); +/// assert_eq!(parser("123"), Err(Err::Error(("123", ErrorKind::Tag)))); +/// ``` +pub fn preceded<I, O1, O2, E: ParseError<I>, F, G>( + mut first: F, + mut second: G, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: Parser<I, O2, E>, +{ + move |input: I| { + let (input, _) = first.parse(input)?; + second.parse(input) + } +} + +/// Gets an object from the first parser, +/// then matches an object from the second parser and discards it. +/// +/// # Arguments +/// * `first` The first parser to apply. +/// * `second` The second parser to match an object. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::sequence::terminated; +/// use nom::bytes::complete::tag; +/// +/// let mut parser = terminated(tag("abc"), tag("efg")); +/// +/// assert_eq!(parser("abcefg"), Ok(("", "abc"))); +/// assert_eq!(parser("abcefghij"), Ok(("hij", "abc"))); +/// assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag)))); +/// assert_eq!(parser("123"), Err(Err::Error(("123", ErrorKind::Tag)))); +/// ``` +pub fn terminated<I, O1, O2, E: ParseError<I>, F, G>( + mut first: F, + mut second: G, +) -> impl FnMut(I) -> IResult<I, O1, E> +where + F: Parser<I, O1, E>, + G: Parser<I, O2, E>, +{ + move |input: I| { + let (input, o1) = first.parse(input)?; + second.parse(input).map(|(i, _)| (i, o1)) + } +} + +/// Gets an object from the first parser, +/// then matches an object from the sep_parser and discards it, +/// then gets another object from the second parser. +/// +/// # Arguments +/// * `first` The first parser to apply. +/// * `sep` The separator parser to apply. +/// * `second` The second parser to apply. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::sequence::separated_pair; +/// use nom::bytes::complete::tag; +/// +/// let mut parser = separated_pair(tag("abc"), tag("|"), tag("efg")); +/// +/// assert_eq!(parser("abc|efg"), Ok(("", ("abc", "efg")))); +/// assert_eq!(parser("abc|efghij"), Ok(("hij", ("abc", "efg")))); +/// assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag)))); +/// assert_eq!(parser("123"), Err(Err::Error(("123", ErrorKind::Tag)))); +/// ``` +pub fn separated_pair<I, O1, O2, O3, E: ParseError<I>, F, G, H>( + mut first: F, + mut sep: G, + mut second: H, +) -> impl FnMut(I) -> IResult<I, (O1, O3), E> +where + F: Parser<I, O1, E>, + G: Parser<I, O2, E>, + H: Parser<I, O3, E>, +{ + move |input: I| { + let (input, o1) = first.parse(input)?; + let (input, _) = sep.parse(input)?; + second.parse(input).map(|(i, o2)| (i, (o1, o2))) + } +} + +/// Matches an object from the first parser and discards it, +/// then gets an object from the second parser, +/// and finally matches an object from the third parser and discards it. +/// +/// # Arguments +/// * `first` The first parser to apply and discard. +/// * `second` The second parser to apply. +/// * `third` The third parser to apply and discard. +/// +/// ```rust +/// # use nom::{Err, error::ErrorKind, Needed}; +/// # use nom::Needed::Size; +/// use nom::sequence::delimited; +/// use nom::bytes::complete::tag; +/// +/// let mut parser = delimited(tag("("), tag("abc"), tag(")")); +/// +/// assert_eq!(parser("(abc)"), Ok(("", "abc"))); +/// assert_eq!(parser("(abc)def"), Ok(("def", "abc"))); +/// assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag)))); +/// assert_eq!(parser("123"), Err(Err::Error(("123", ErrorKind::Tag)))); +/// ``` +pub fn delimited<I, O1, O2, O3, E: ParseError<I>, F, G, H>( + mut first: F, + mut second: G, + mut third: H, +) -> impl FnMut(I) -> IResult<I, O2, E> +where + F: Parser<I, O1, E>, + G: Parser<I, O2, E>, + H: Parser<I, O3, E>, +{ + move |input: I| { + let (input, _) = first.parse(input)?; + let (input, o2) = second.parse(input)?; + third.parse(input).map(|(i, _)| (i, o2)) + } +} + +/// Helper trait for the tuple combinator. +/// +/// This trait is implemented for tuples of parsers of up to 21 elements. +pub trait Tuple<I, O, E> { + /// Parses the input and returns a tuple of results of each parser. + fn parse(&mut self, input: I) -> IResult<I, O, E>; +} + +impl<Input, Output, Error: ParseError<Input>, F: Parser<Input, Output, Error>> + Tuple<Input, (Output,), Error> for (F,) +{ + fn parse(&mut self, input: Input) -> IResult<Input, (Output,), Error> { + self.0.parse(input).map(|(i, o)| (i, (o,))) + } +} + +macro_rules! tuple_trait( + ($name1:ident $ty1:ident, $name2: ident $ty2:ident, $($name:ident $ty:ident),*) => ( + tuple_trait!(__impl $name1 $ty1, $name2 $ty2; $($name $ty),*); + ); + (__impl $($name:ident $ty: ident),+; $name1:ident $ty1:ident, $($name2:ident $ty2:ident),*) => ( + tuple_trait_impl!($($name $ty),+); + tuple_trait!(__impl $($name $ty),+ , $name1 $ty1; $($name2 $ty2),*); + ); + (__impl $($name:ident $ty: ident),+; $name1:ident $ty1:ident) => ( + tuple_trait_impl!($($name $ty),+); + tuple_trait_impl!($($name $ty),+, $name1 $ty1); + ); +); + +macro_rules! tuple_trait_impl( + ($($name:ident $ty: ident),+) => ( + impl< + Input: Clone, $($ty),+ , Error: ParseError<Input>, + $($name: Parser<Input, $ty, Error>),+ + > Tuple<Input, ( $($ty),+ ), Error> for ( $($name),+ ) { + + fn parse(&mut self, input: Input) -> IResult<Input, ( $($ty),+ ), Error> { + tuple_trait_inner!(0, self, input, (), $($name)+) + + } + } + ); +); + +macro_rules! tuple_trait_inner( + ($it:tt, $self:expr, $input:expr, (), $head:ident $($id:ident)+) => ({ + let (i, o) = $self.$it.parse($input.clone())?; + + succ!($it, tuple_trait_inner!($self, i, ( o ), $($id)+)) + }); + ($it:tt, $self:expr, $input:expr, ($($parsed:tt)*), $head:ident $($id:ident)+) => ({ + let (i, o) = $self.$it.parse($input.clone())?; + + succ!($it, tuple_trait_inner!($self, i, ($($parsed)* , o), $($id)+)) + }); + ($it:tt, $self:expr, $input:expr, ($($parsed:tt)*), $head:ident) => ({ + let (i, o) = $self.$it.parse($input.clone())?; + + Ok((i, ($($parsed)* , o))) + }); +); + +tuple_trait!(FnA A, FnB B, FnC C, FnD D, FnE E, FnF F, FnG G, FnH H, FnI I, FnJ J, FnK K, FnL L, + FnM M, FnN N, FnO O, FnP P, FnQ Q, FnR R, FnS S, FnT T, FnU U); + +// Special case: implement `Tuple` for `()`, the unit type. +// This can come up in macros which accept a variable number of arguments. +// Literally, `()` is an empty tuple, so it should simply parse nothing. +impl<I, E: ParseError<I>> Tuple<I, (), E> for () { + fn parse(&mut self, input: I) -> IResult<I, (), E> { + Ok((input, ())) + } +} + +///Applies a tuple of parsers one by one and returns their results as a tuple. +///There is a maximum of 21 parsers +/// ```rust +/// # use nom::{Err, error::ErrorKind}; +/// use nom::sequence::tuple; +/// use nom::character::complete::{alpha1, digit1}; +/// let mut parser = tuple((alpha1, digit1, alpha1)); +/// +/// assert_eq!(parser("abc123def"), Ok(("", ("abc", "123", "def")))); +/// assert_eq!(parser("123def"), Err(Err::Error(("123def", ErrorKind::Alpha)))); +/// ``` +pub fn tuple<I, O, E: ParseError<I>, List: Tuple<I, O, E>>( + mut l: List, +) -> impl FnMut(I) -> IResult<I, O, E> { + move |i: I| l.parse(i) +} diff --git a/third_party/rust/nom/src/sequence/tests.rs b/third_party/rust/nom/src/sequence/tests.rs new file mode 100644 index 0000000000..30ad0d6783 --- /dev/null +++ b/third_party/rust/nom/src/sequence/tests.rs @@ -0,0 +1,290 @@ +use super::*; +use crate::bytes::streaming::{tag, take}; +use crate::error::{Error, ErrorKind}; +use crate::internal::{Err, IResult, Needed}; +use crate::number::streaming::be_u16; + +#[test] +fn single_element_tuples() { + use crate::character::complete::alpha1; + use crate::{error::ErrorKind, Err}; + + let mut parser = tuple((alpha1,)); + assert_eq!(parser("abc123def"), Ok(("123def", ("abc",)))); + assert_eq!( + parser("123def"), + Err(Err::Error(("123def", ErrorKind::Alpha))) + ); +} + +#[derive(PartialEq, Eq, Debug)] +struct B { + a: u8, + b: u8, +} + +#[derive(PartialEq, Eq, Debug)] +struct C { + a: u8, + b: Option<u8>, +} + +/*FIXME: convert code examples to new error management +use util::{add_error_pattern, error_to_list, print_error}; + +#[cfg(feature = "std")] +#[rustfmt::skip] +fn error_to_string<P: Clone + PartialEq>(e: &Context<P, u32>) -> &'static str { + let v: Vec<(P, ErrorKind<u32>)> = error_to_list(e); + // do it this way if you can use slice patterns + //match &v[..] { + // [ErrorKind::Custom(42), ErrorKind::Tag] => "missing `ijkl` tag", + // [ErrorKind::Custom(42), ErrorKind::Custom(128), ErrorKind::Tag] => "missing `mnop` tag after `ijkl`", + // _ => "unrecognized error" + //} + + let collected: Vec<ErrorKind<u32>> = v.iter().map(|&(_, ref e)| e.clone()).collect(); + if &collected[..] == [ErrorKind::Custom(42), ErrorKind::Tag] { + "missing `ijkl` tag" + } else if &collected[..] == [ErrorKind::Custom(42), ErrorKind::Custom(128), ErrorKind::Tag] { + "missing `mnop` tag after `ijkl`" + } else { + "unrecognized error" + } +} + +// do it this way if you can use box patterns +//use $crate::lib::std::str; +//fn error_to_string(e:Err) -> String +// match e { +// NodePosition(ErrorKind::Custom(42), i1, box Position(ErrorKind::Tag, i2)) => { +// format!("missing `ijkl` tag, found '{}' instead", str::from_utf8(i2).unwrap()) +// }, +// NodePosition(ErrorKind::Custom(42), i1, box NodePosition(ErrorKind::Custom(128), i2, box Position(ErrorKind::Tag, i3))) => { +// format!("missing `mnop` tag after `ijkl`, found '{}' instead", str::from_utf8(i3).unwrap()) +// }, +// _ => "unrecognized error".to_string() +// } +//} +*/ + +#[test] +fn complete() { + use crate::bytes::complete::tag; + fn err_test(i: &[u8]) -> IResult<&[u8], &[u8]> { + let (i, _) = tag("ijkl")(i)?; + tag("mnop")(i) + } + let a = &b"ijklmn"[..]; + + let res_a = err_test(a); + assert_eq!( + res_a, + Err(Err::Error(error_position!(&b"mn"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn pair_test() { + fn pair_abc_def(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + pair(tag("abc"), tag("def"))(i) + } + + assert_eq!( + pair_abc_def(&b"abcdefghijkl"[..]), + Ok((&b"ghijkl"[..], (&b"abc"[..], &b"def"[..]))) + ); + assert_eq!( + pair_abc_def(&b"ab"[..]), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + pair_abc_def(&b"abcd"[..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_eq!( + pair_abc_def(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + pair_abc_def(&b"xxxdef"[..]), + Err(Err::Error(error_position!(&b"xxxdef"[..], ErrorKind::Tag))) + ); + assert_eq!( + pair_abc_def(&b"abcxxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn separated_pair_test() { + fn sep_pair_abc_def(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> { + separated_pair(tag("abc"), tag(","), tag("def"))(i) + } + + assert_eq!( + sep_pair_abc_def(&b"abc,defghijkl"[..]), + Ok((&b"ghijkl"[..], (&b"abc"[..], &b"def"[..]))) + ); + assert_eq!( + sep_pair_abc_def(&b"ab"[..]), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + sep_pair_abc_def(&b"abc,d"[..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_eq!( + sep_pair_abc_def(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + sep_pair_abc_def(&b"xxx,def"[..]), + Err(Err::Error(error_position!(&b"xxx,def"[..], ErrorKind::Tag))) + ); + assert_eq!( + sep_pair_abc_def(&b"abc,xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn preceded_test() { + fn preceded_abcd_efgh(i: &[u8]) -> IResult<&[u8], &[u8]> { + preceded(tag("abcd"), tag("efgh"))(i) + } + + assert_eq!( + preceded_abcd_efgh(&b"abcdefghijkl"[..]), + Ok((&b"ijkl"[..], &b"efgh"[..])) + ); + assert_eq!( + preceded_abcd_efgh(&b"ab"[..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_eq!( + preceded_abcd_efgh(&b"abcde"[..]), + Err(Err::Incomplete(Needed::new(3))) + ); + assert_eq!( + preceded_abcd_efgh(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + preceded_abcd_efgh(&b"xxxxdef"[..]), + Err(Err::Error(error_position!(&b"xxxxdef"[..], ErrorKind::Tag))) + ); + assert_eq!( + preceded_abcd_efgh(&b"abcdxxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn terminated_test() { + fn terminated_abcd_efgh(i: &[u8]) -> IResult<&[u8], &[u8]> { + terminated(tag("abcd"), tag("efgh"))(i) + } + + assert_eq!( + terminated_abcd_efgh(&b"abcdefghijkl"[..]), + Ok((&b"ijkl"[..], &b"abcd"[..])) + ); + assert_eq!( + terminated_abcd_efgh(&b"ab"[..]), + Err(Err::Incomplete(Needed::new(2))) + ); + assert_eq!( + terminated_abcd_efgh(&b"abcde"[..]), + Err(Err::Incomplete(Needed::new(3))) + ); + assert_eq!( + terminated_abcd_efgh(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + terminated_abcd_efgh(&b"xxxxdef"[..]), + Err(Err::Error(error_position!(&b"xxxxdef"[..], ErrorKind::Tag))) + ); + assert_eq!( + terminated_abcd_efgh(&b"abcdxxxx"[..]), + Err(Err::Error(error_position!(&b"xxxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn delimited_test() { + fn delimited_abc_def_ghi(i: &[u8]) -> IResult<&[u8], &[u8]> { + delimited(tag("abc"), tag("def"), tag("ghi"))(i) + } + + assert_eq!( + delimited_abc_def_ghi(&b"abcdefghijkl"[..]), + Ok((&b"jkl"[..], &b"def"[..])) + ); + assert_eq!( + delimited_abc_def_ghi(&b"ab"[..]), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + delimited_abc_def_ghi(&b"abcde"[..]), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + delimited_abc_def_ghi(&b"abcdefgh"[..]), + Err(Err::Incomplete(Needed::new(1))) + ); + assert_eq!( + delimited_abc_def_ghi(&b"xxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); + assert_eq!( + delimited_abc_def_ghi(&b"xxxdefghi"[..]), + Err(Err::Error(error_position!( + &b"xxxdefghi"[..], + ErrorKind::Tag + ),)) + ); + assert_eq!( + delimited_abc_def_ghi(&b"abcxxxghi"[..]), + Err(Err::Error(error_position!(&b"xxxghi"[..], ErrorKind::Tag))) + ); + assert_eq!( + delimited_abc_def_ghi(&b"abcdefxxx"[..]), + Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn tuple_test() { + fn tuple_3(i: &[u8]) -> IResult<&[u8], (u16, &[u8], &[u8])> { + tuple((be_u16, take(3u8), tag("fg")))(i) + } + + assert_eq!( + tuple_3(&b"abcdefgh"[..]), + Ok((&b"h"[..], (0x6162u16, &b"cde"[..], &b"fg"[..]))) + ); + assert_eq!(tuple_3(&b"abcd"[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(tuple_3(&b"abcde"[..]), Err(Err::Incomplete(Needed::new(2)))); + assert_eq!( + tuple_3(&b"abcdejk"[..]), + Err(Err::Error(error_position!(&b"jk"[..], ErrorKind::Tag))) + ); +} + +#[test] +fn unit_type() { + assert_eq!( + tuple::<&'static str, (), Error<&'static str>, ()>(())("abxsbsh"), + Ok(("abxsbsh", ())) + ); + assert_eq!( + tuple::<&'static str, (), Error<&'static str>, ()>(())("sdfjakdsas"), + Ok(("sdfjakdsas", ())) + ); + assert_eq!( + tuple::<&'static str, (), Error<&'static str>, ()>(())(""), + Ok(("", ())) + ); +} diff --git a/third_party/rust/nom/src/str.rs b/third_party/rust/nom/src/str.rs new file mode 100644 index 0000000000..1a8b8ba2d4 --- /dev/null +++ b/third_party/rust/nom/src/str.rs @@ -0,0 +1,536 @@ +#[cfg(test)] +mod test { + #[cfg(feature = "alloc")] + use crate::{branch::alt, bytes::complete::tag_no_case, combinator::recognize, multi::many1}; + use crate::{ + bytes::complete::{is_a, is_not, tag, take, take_till, take_until}, + error::{self, ErrorKind}, + Err, IResult, + }; + + #[test] + fn tagtr_succeed() { + const INPUT: &str = "Hello World!"; + const TAG: &str = "Hello"; + fn test(input: &str) -> IResult<&str, &str> { + tag(TAG)(input) + } + + match test(INPUT) { + Ok((extra, output)) => { + assert!(extra == " World!", "Parser `tag` consumed leftover input."); + assert!( + output == TAG, + "Parser `tag` doesn't return the tag it matched on success. \ + Expected `{}`, got `{}`.", + TAG, + output + ); + } + other => panic!( + "Parser `tag` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn tagtr_incomplete() { + use crate::bytes::streaming::tag; + + const INPUT: &str = "Hello"; + const TAG: &str = "Hello World!"; + + let res: IResult<_, _, error::Error<_>> = tag(TAG)(INPUT); + match res { + Err(Err::Incomplete(_)) => (), + other => { + panic!( + "Parser `tag` didn't require more input when it should have. \ + Got `{:?}`.", + other + ); + } + }; + } + + #[test] + fn tagtr_error() { + const INPUT: &str = "Hello World!"; + const TAG: &str = "Random"; // TAG must be closer than INPUT. + + let res: IResult<_, _, error::Error<_>> = tag(TAG)(INPUT); + match res { + Err(Err::Error(_)) => (), + other => { + panic!( + "Parser `tag` didn't fail when it should have. Got `{:?}`.`", + other + ); + } + }; + } + + #[test] + fn take_s_succeed() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + + let res: IResult<_, _, error::Error<_>> = take(9_usize)(INPUT); + match res { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_s` consumed leftover input. Leftover `{}`.", + extra + ); + assert!( + output == CONSUMED, + "Parser `take_s` doesn't return the string it consumed on success. Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_s` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_until_succeed() { + const INPUT: &str = "βèƒôřèÂßÇ∂áƒƭèř"; + const FIND: &str = "ÂßÇ∂"; + const CONSUMED: &str = "βèƒôřè"; + const LEFTOVER: &str = "ÂßÇ∂áƒƭèř"; + + let res: IResult<_, _, (_, ErrorKind)> = take_until(FIND)(INPUT); + match res { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_until`\ + consumed leftover input. Leftover `{}`.", + extra + ); + assert!( + output == CONSUMED, + "Parser `take_until`\ + doesn't return the string it consumed on success. Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_until` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_s_incomplete() { + use crate::bytes::streaming::take; + + const INPUT: &str = "βèƒôřèÂßÇá"; + + let res: IResult<_, _, (_, ErrorKind)> = take(13_usize)(INPUT); + match res { + Err(Err::Incomplete(_)) => (), + other => panic!( + "Parser `take` didn't require more input when it should have. \ + Got `{:?}`.", + other + ), + } + } + + use crate::internal::Needed; + + fn is_alphabetic(c: char) -> bool { + (c as u8 >= 0x41 && c as u8 <= 0x5A) || (c as u8 >= 0x61 && c as u8 <= 0x7A) + } + + #[test] + fn take_while() { + use crate::bytes::streaming::take_while; + + fn f(i: &str) -> IResult<&str, &str> { + take_while(is_alphabetic)(i) + } + let a = ""; + let b = "abcd"; + let c = "abcd123"; + let d = "123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&b[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&c[..]), Ok((&d[..], &b[..]))); + assert_eq!(f(&d[..]), Ok((&d[..], &a[..]))); + } + + #[test] + fn take_while1() { + use crate::bytes::streaming::take_while1; + + fn f(i: &str) -> IResult<&str, &str> { + take_while1(is_alphabetic)(i) + } + let a = ""; + let b = "abcd"; + let c = "abcd123"; + let d = "123"; + + assert_eq!(f(&a[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&b[..]), Err(Err::Incomplete(Needed::new(1)))); + assert_eq!(f(&c[..]), Ok((&"123"[..], &b[..]))); + assert_eq!( + f(&d[..]), + Err(Err::Error(error_position!(&d[..], ErrorKind::TakeWhile1))) + ); + } + + #[test] + fn take_till_s_succeed() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + fn till_s(c: char) -> bool { + c == 'á' + } + fn test(input: &str) -> IResult<&str, &str> { + take_till(till_s)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_till` consumed leftover input." + ); + assert!( + output == CONSUMED, + "Parser `take_till` doesn't return the string it consumed on success. \ + Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_till` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_while_succeed_none() { + use crate::bytes::complete::take_while; + + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const CONSUMED: &str = ""; + const LEFTOVER: &str = "βèƒôřèÂßÇáƒƭèř"; + fn while_s(c: char) -> bool { + c == '9' + } + fn test(input: &str) -> IResult<&str, &str> { + take_while(while_s)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_while` consumed leftover input." + ); + assert!( + output == CONSUMED, + "Parser `take_while` doesn't return the string it consumed on success. \ + Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_while` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn is_not_succeed() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const AVOID: &str = "£úçƙ¥á"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + fn test(input: &str) -> IResult<&str, &str> { + is_not(AVOID)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `is_not` consumed leftover input. Leftover `{}`.", + extra + ); + assert!( + output == CONSUMED, + "Parser `is_not` doesn't return the string it consumed on success. Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `is_not` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_while_succeed_some() { + use crate::bytes::complete::take_while; + + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + fn while_s(c: char) -> bool { + c == 'β' + || c == 'è' + || c == 'ƒ' + || c == 'ô' + || c == 'ř' + || c == 'è' + || c == 'Â' + || c == 'ß' + || c == 'Ç' + } + fn test(input: &str) -> IResult<&str, &str> { + take_while(while_s)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_while` consumed leftover input." + ); + assert!( + output == CONSUMED, + "Parser `take_while` doesn't return the string it consumed on success. \ + Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_while` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn is_not_fail() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const AVOID: &str = "βúçƙ¥"; + fn test(input: &str) -> IResult<&str, &str> { + is_not(AVOID)(input) + } + match test(INPUT) { + Err(Err::Error(_)) => (), + other => panic!( + "Parser `is_not` didn't fail when it should have. Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_while1_succeed() { + use crate::bytes::complete::take_while1; + + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + fn while1_s(c: char) -> bool { + c == 'β' + || c == 'è' + || c == 'ƒ' + || c == 'ô' + || c == 'ř' + || c == 'è' + || c == 'Â' + || c == 'ß' + || c == 'Ç' + } + fn test(input: &str) -> IResult<&str, &str> { + take_while1(while1_s)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `take_while1` consumed leftover input." + ); + assert!( + output == CONSUMED, + "Parser `take_while1` doesn't return the string it consumed on success. \ + Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `take_while1` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_until_incomplete() { + use crate::bytes::streaming::take_until; + + const INPUT: &str = "βèƒôřè"; + const FIND: &str = "βèƒôřèÂßÇ"; + + let res: IResult<_, _, (_, ErrorKind)> = take_until(FIND)(INPUT); + match res { + Err(Err::Incomplete(_)) => (), + other => panic!( + "Parser `take_until` didn't require more input when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn is_a_succeed() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const MATCH: &str = "βèƒôřèÂßÇ"; + const CONSUMED: &str = "βèƒôřèÂßÇ"; + const LEFTOVER: &str = "áƒƭèř"; + fn test(input: &str) -> IResult<&str, &str> { + is_a(MATCH)(input) + } + match test(INPUT) { + Ok((extra, output)) => { + assert!( + extra == LEFTOVER, + "Parser `is_a` consumed leftover input. Leftover `{}`.", + extra + ); + assert!( + output == CONSUMED, + "Parser `is_a` doesn't return the string it consumed on success. Expected `{}`, got `{}`.", + CONSUMED, + output + ); + } + other => panic!( + "Parser `is_a` didn't succeed when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_while1_fail() { + use crate::bytes::complete::take_while1; + + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + fn while1_s(c: char) -> bool { + c == '9' + } + fn test(input: &str) -> IResult<&str, &str> { + take_while1(while1_s)(input) + } + match test(INPUT) { + Err(Err::Error(_)) => (), + other => panic!( + "Parser `take_while1` didn't fail when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + fn is_a_fail() { + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const MATCH: &str = "Ûñℓúçƙ¥"; + fn test(input: &str) -> IResult<&str, &str> { + is_a(MATCH)(input) + } + match test(INPUT) { + Err(Err::Error(_)) => (), + other => panic!( + "Parser `is_a` didn't fail when it should have. Got `{:?}`.", + other + ), + }; + } + + #[test] + fn take_until_error() { + use crate::bytes::streaming::take_until; + + const INPUT: &str = "βèƒôřèÂßÇáƒƭèř"; + const FIND: &str = "Ráñδô₥"; + + let res: IResult<_, _, (_, ErrorKind)> = take_until(FIND)(INPUT); + match res { + Err(Err::Incomplete(_)) => (), + other => panic!( + "Parser `take_until` didn't fail when it should have. \ + Got `{:?}`.", + other + ), + }; + } + + #[test] + #[cfg(feature = "alloc")] + fn recognize_is_a() { + let a = "aabbab"; + let b = "ababcd"; + + fn f(i: &str) -> IResult<&str, &str> { + recognize(many1(alt((tag("a"), tag("b")))))(i) + } + + assert_eq!(f(&a[..]), Ok((&a[6..], &a[..]))); + assert_eq!(f(&b[..]), Ok((&b[4..], &b[..4]))); + } + + #[test] + fn utf8_indexing() { + fn dot(i: &str) -> IResult<&str, &str> { + tag(".")(i) + } + + let _ = dot("點"); + } + + #[cfg(feature = "alloc")] + #[test] + fn case_insensitive() { + fn test(i: &str) -> IResult<&str, &str> { + tag_no_case("ABcd")(i) + } + assert_eq!(test("aBCdefgh"), Ok(("efgh", "aBCd"))); + assert_eq!(test("abcdefgh"), Ok(("efgh", "abcd"))); + assert_eq!(test("ABCDefgh"), Ok(("efgh", "ABCD"))); + } +} diff --git a/third_party/rust/nom/src/traits.rs b/third_party/rust/nom/src/traits.rs new file mode 100644 index 0000000000..394e5bc3a5 --- /dev/null +++ b/third_party/rust/nom/src/traits.rs @@ -0,0 +1,1441 @@ +//! Traits input types have to implement to work with nom combinators +use crate::error::{ErrorKind, ParseError}; +use crate::internal::{Err, IResult, Needed}; +use crate::lib::std::iter::{Copied, Enumerate}; +use crate::lib::std::ops::{Range, RangeFrom, RangeFull, RangeTo}; +use crate::lib::std::slice::Iter; +use crate::lib::std::str::from_utf8; +use crate::lib::std::str::CharIndices; +use crate::lib::std::str::Chars; +use crate::lib::std::str::FromStr; + +#[cfg(feature = "alloc")] +use crate::lib::std::string::String; +#[cfg(feature = "alloc")] +use crate::lib::std::vec::Vec; + +/// Abstract method to calculate the input length +pub trait InputLength { + /// Calculates the input length, as indicated by its name, + /// and the name of the trait itself + fn input_len(&self) -> usize; +} + +impl<'a, T> InputLength for &'a [T] { + #[inline] + fn input_len(&self) -> usize { + self.len() + } +} + +impl<'a> InputLength for &'a str { + #[inline] + fn input_len(&self) -> usize { + self.len() + } +} + +impl<'a> InputLength for (&'a [u8], usize) { + #[inline] + fn input_len(&self) -> usize { + //println!("bit input length for ({:?}, {}):", self.0, self.1); + //println!("-> {}", self.0.len() * 8 - self.1); + self.0.len() * 8 - self.1 + } +} + +/// Useful functions to calculate the offset between slices and show a hexdump of a slice +pub trait Offset { + /// Offset between the first byte of self and the first byte of the argument + fn offset(&self, second: &Self) -> usize; +} + +impl Offset for [u8] { + fn offset(&self, second: &Self) -> usize { + let fst = self.as_ptr(); + let snd = second.as_ptr(); + + snd as usize - fst as usize + } +} + +impl<'a> Offset for &'a [u8] { + fn offset(&self, second: &Self) -> usize { + let fst = self.as_ptr(); + let snd = second.as_ptr(); + + snd as usize - fst as usize + } +} + +impl Offset for str { + fn offset(&self, second: &Self) -> usize { + let fst = self.as_ptr(); + let snd = second.as_ptr(); + + snd as usize - fst as usize + } +} + +impl<'a> Offset for &'a str { + fn offset(&self, second: &Self) -> usize { + let fst = self.as_ptr(); + let snd = second.as_ptr(); + + snd as usize - fst as usize + } +} + +/// Helper trait for types that can be viewed as a byte slice +pub trait AsBytes { + /// Casts the input type to a byte slice + fn as_bytes(&self) -> &[u8]; +} + +impl<'a> AsBytes for &'a str { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + (*self).as_bytes() + } +} + +impl AsBytes for str { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + self.as_ref() + } +} + +impl<'a> AsBytes for &'a [u8] { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + *self + } +} + +impl AsBytes for [u8] { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + self + } +} + +macro_rules! as_bytes_array_impls { + ($($N:expr)+) => { + $( + impl<'a> AsBytes for &'a [u8; $N] { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + *self + } + } + + impl AsBytes for [u8; $N] { + #[inline(always)] + fn as_bytes(&self) -> &[u8] { + self + } + } + )+ + }; +} + +as_bytes_array_impls! { + 0 1 2 3 4 5 6 7 8 9 + 10 11 12 13 14 15 16 17 18 19 + 20 21 22 23 24 25 26 27 28 29 + 30 31 32 +} + +/// Transforms common types to a char for basic token parsing +pub trait AsChar { + /// makes a char from self + fn as_char(self) -> char; + + /// Tests that self is an alphabetic character + /// + /// Warning: for `&str` it recognizes alphabetic + /// characters outside of the 52 ASCII letters + fn is_alpha(self) -> bool; + + /// Tests that self is an alphabetic character + /// or a decimal digit + fn is_alphanum(self) -> bool; + /// Tests that self is a decimal digit + fn is_dec_digit(self) -> bool; + /// Tests that self is an hex digit + fn is_hex_digit(self) -> bool; + /// Tests that self is an octal digit + fn is_oct_digit(self) -> bool; + /// Gets the len in bytes for self + fn len(self) -> usize; +} + +impl AsChar for u8 { + #[inline] + fn as_char(self) -> char { + self as char + } + #[inline] + fn is_alpha(self) -> bool { + (self >= 0x41 && self <= 0x5A) || (self >= 0x61 && self <= 0x7A) + } + #[inline] + fn is_alphanum(self) -> bool { + self.is_alpha() || self.is_dec_digit() + } + #[inline] + fn is_dec_digit(self) -> bool { + self >= 0x30 && self <= 0x39 + } + #[inline] + fn is_hex_digit(self) -> bool { + (self >= 0x30 && self <= 0x39) + || (self >= 0x41 && self <= 0x46) + || (self >= 0x61 && self <= 0x66) + } + #[inline] + fn is_oct_digit(self) -> bool { + self >= 0x30 && self <= 0x37 + } + #[inline] + fn len(self) -> usize { + 1 + } +} +impl<'a> AsChar for &'a u8 { + #[inline] + fn as_char(self) -> char { + *self as char + } + #[inline] + fn is_alpha(self) -> bool { + (*self >= 0x41 && *self <= 0x5A) || (*self >= 0x61 && *self <= 0x7A) + } + #[inline] + fn is_alphanum(self) -> bool { + self.is_alpha() || self.is_dec_digit() + } + #[inline] + fn is_dec_digit(self) -> bool { + *self >= 0x30 && *self <= 0x39 + } + #[inline] + fn is_hex_digit(self) -> bool { + (*self >= 0x30 && *self <= 0x39) + || (*self >= 0x41 && *self <= 0x46) + || (*self >= 0x61 && *self <= 0x66) + } + #[inline] + fn is_oct_digit(self) -> bool { + *self >= 0x30 && *self <= 0x37 + } + #[inline] + fn len(self) -> usize { + 1 + } +} + +impl AsChar for char { + #[inline] + fn as_char(self) -> char { + self + } + #[inline] + fn is_alpha(self) -> bool { + self.is_ascii_alphabetic() + } + #[inline] + fn is_alphanum(self) -> bool { + self.is_alpha() || self.is_dec_digit() + } + #[inline] + fn is_dec_digit(self) -> bool { + self.is_ascii_digit() + } + #[inline] + fn is_hex_digit(self) -> bool { + self.is_ascii_hexdigit() + } + #[inline] + fn is_oct_digit(self) -> bool { + self.is_digit(8) + } + #[inline] + fn len(self) -> usize { + self.len_utf8() + } +} + +impl<'a> AsChar for &'a char { + #[inline] + fn as_char(self) -> char { + *self + } + #[inline] + fn is_alpha(self) -> bool { + self.is_ascii_alphabetic() + } + #[inline] + fn is_alphanum(self) -> bool { + self.is_alpha() || self.is_dec_digit() + } + #[inline] + fn is_dec_digit(self) -> bool { + self.is_ascii_digit() + } + #[inline] + fn is_hex_digit(self) -> bool { + self.is_ascii_hexdigit() + } + #[inline] + fn is_oct_digit(self) -> bool { + self.is_digit(8) + } + #[inline] + fn len(self) -> usize { + self.len_utf8() + } +} + +/// Abstracts common iteration operations on the input type +pub trait InputIter { + /// The current input type is a sequence of that `Item` type. + /// + /// Example: `u8` for `&[u8]` or `char` for `&str` + type Item; + /// An iterator over the input type, producing the item and its position + /// for use with [Slice]. If we're iterating over `&str`, the position + /// corresponds to the byte index of the character + type Iter: Iterator<Item = (usize, Self::Item)>; + + /// An iterator over the input type, producing the item + type IterElem: Iterator<Item = Self::Item>; + + /// Returns an iterator over the elements and their byte offsets + fn iter_indices(&self) -> Self::Iter; + /// Returns an iterator over the elements + fn iter_elements(&self) -> Self::IterElem; + /// Finds the byte position of the element + fn position<P>(&self, predicate: P) -> Option<usize> + where + P: Fn(Self::Item) -> bool; + /// Get the byte offset from the element's position in the stream + fn slice_index(&self, count: usize) -> Result<usize, Needed>; +} + +/// Abstracts slicing operations +pub trait InputTake: Sized { + /// Returns a slice of `count` bytes. panics if count > length + fn take(&self, count: usize) -> Self; + /// Split the stream at the `count` byte offset. panics if count > length + fn take_split(&self, count: usize) -> (Self, Self); +} + +impl<'a> InputIter for &'a [u8] { + type Item = u8; + type Iter = Enumerate<Self::IterElem>; + type IterElem = Copied<Iter<'a, u8>>; + + #[inline] + fn iter_indices(&self) -> Self::Iter { + self.iter_elements().enumerate() + } + #[inline] + fn iter_elements(&self) -> Self::IterElem { + self.iter().copied() + } + #[inline] + fn position<P>(&self, predicate: P) -> Option<usize> + where + P: Fn(Self::Item) -> bool, + { + self.iter().position(|b| predicate(*b)) + } + #[inline] + fn slice_index(&self, count: usize) -> Result<usize, Needed> { + if self.len() >= count { + Ok(count) + } else { + Err(Needed::new(count - self.len())) + } + } +} + +impl<'a> InputTake for &'a [u8] { + #[inline] + fn take(&self, count: usize) -> Self { + &self[0..count] + } + #[inline] + fn take_split(&self, count: usize) -> (Self, Self) { + let (prefix, suffix) = self.split_at(count); + (suffix, prefix) + } +} + +impl<'a> InputIter for &'a str { + type Item = char; + type Iter = CharIndices<'a>; + type IterElem = Chars<'a>; + #[inline] + fn iter_indices(&self) -> Self::Iter { + self.char_indices() + } + #[inline] + fn iter_elements(&self) -> Self::IterElem { + self.chars() + } + fn position<P>(&self, predicate: P) -> Option<usize> + where + P: Fn(Self::Item) -> bool, + { + for (o, c) in self.char_indices() { + if predicate(c) { + return Some(o); + } + } + None + } + #[inline] + fn slice_index(&self, count: usize) -> Result<usize, Needed> { + let mut cnt = 0; + for (index, _) in self.char_indices() { + if cnt == count { + return Ok(index); + } + cnt += 1; + } + if cnt == count { + return Ok(self.len()); + } + Err(Needed::Unknown) + } +} + +impl<'a> InputTake for &'a str { + #[inline] + fn take(&self, count: usize) -> Self { + &self[..count] + } + + // return byte index + #[inline] + fn take_split(&self, count: usize) -> (Self, Self) { + let (prefix, suffix) = self.split_at(count); + (suffix, prefix) + } +} + +/// Dummy trait used for default implementations (currently only used for `InputTakeAtPosition` and `Compare`). +/// +/// When implementing a custom input type, it is possible to use directly the +/// default implementation: If the input type implements `InputLength`, `InputIter`, +/// `InputTake` and `Clone`, you can implement `UnspecializedInput` and get +/// a default version of `InputTakeAtPosition` and `Compare`. +/// +/// For performance reasons, you might want to write a custom implementation of +/// `InputTakeAtPosition` (like the one for `&[u8]`). +pub trait UnspecializedInput {} + +/// Methods to take as much input as possible until the provided function returns true for the current element. +/// +/// A large part of nom's basic parsers are built using this trait. +pub trait InputTakeAtPosition: Sized { + /// The current input type is a sequence of that `Item` type. + /// + /// Example: `u8` for `&[u8]` or `char` for `&str` + type Item; + + /// Looks for the first element of the input type for which the condition returns true, + /// and returns the input up to this position. + /// + /// *streaming version*: If no element is found matching the condition, this will return `Incomplete` + fn split_at_position<P, E: ParseError<Self>>(&self, predicate: P) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool; + + /// Looks for the first element of the input type for which the condition returns true + /// and returns the input up to this position. + /// + /// Fails if the produced slice is empty. + /// + /// *streaming version*: If no element is found matching the condition, this will return `Incomplete` + fn split_at_position1<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool; + + /// Looks for the first element of the input type for which the condition returns true, + /// and returns the input up to this position. + /// + /// *complete version*: If no element is found matching the condition, this will return the whole input + fn split_at_position_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool; + + /// Looks for the first element of the input type for which the condition returns true + /// and returns the input up to this position. + /// + /// Fails if the produced slice is empty. + /// + /// *complete version*: If no element is found matching the condition, this will return the whole input + fn split_at_position1_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool; +} + +impl<T: InputLength + InputIter + InputTake + Clone + UnspecializedInput> InputTakeAtPosition + for T +{ + type Item = <T as InputIter>::Item; + + fn split_at_position<P, E: ParseError<Self>>(&self, predicate: P) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.position(predicate) { + Some(n) => Ok(self.take_split(n)), + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position1<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.position(predicate) { + Some(0) => Err(Err::Error(E::from_error_kind(self.clone(), e))), + Some(n) => Ok(self.take_split(n)), + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.split_at_position(predicate) { + Err(Err::Incomplete(_)) => Ok(self.take_split(self.input_len())), + res => res, + } + } + + fn split_at_position1_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.split_at_position1(predicate, e) { + Err(Err::Incomplete(_)) => { + if self.input_len() == 0 { + Err(Err::Error(E::from_error_kind(self.clone(), e))) + } else { + Ok(self.take_split(self.input_len())) + } + } + res => res, + } + } +} + +impl<'a> InputTakeAtPosition for &'a [u8] { + type Item = u8; + + fn split_at_position<P, E: ParseError<Self>>(&self, predicate: P) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.iter().position(|c| predicate(*c)) { + Some(i) => Ok(self.take_split(i)), + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position1<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.iter().position(|c| predicate(*c)) { + Some(0) => Err(Err::Error(E::from_error_kind(self, e))), + Some(i) => Ok(self.take_split(i)), + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.iter().position(|c| predicate(*c)) { + Some(i) => Ok(self.take_split(i)), + None => Ok(self.take_split(self.input_len())), + } + } + + fn split_at_position1_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.iter().position(|c| predicate(*c)) { + Some(0) => Err(Err::Error(E::from_error_kind(self, e))), + Some(i) => Ok(self.take_split(i)), + None => { + if self.is_empty() { + Err(Err::Error(E::from_error_kind(self, e))) + } else { + Ok(self.take_split(self.input_len())) + } + } + } + } +} + +impl<'a> InputTakeAtPosition for &'a str { + type Item = char; + + fn split_at_position<P, E: ParseError<Self>>(&self, predicate: P) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.find(predicate) { + // find() returns a byte index that is already in the slice at a char boundary + Some(i) => unsafe { Ok((self.get_unchecked(i..), self.get_unchecked(..i))) }, + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position1<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.find(predicate) { + Some(0) => Err(Err::Error(E::from_error_kind(self, e))), + // find() returns a byte index that is already in the slice at a char boundary + Some(i) => unsafe { Ok((self.get_unchecked(i..), self.get_unchecked(..i))) }, + None => Err(Err::Incomplete(Needed::new(1))), + } + } + + fn split_at_position_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.find(predicate) { + // find() returns a byte index that is already in the slice at a char boundary + Some(i) => unsafe { Ok((self.get_unchecked(i..), self.get_unchecked(..i))) }, + // the end of slice is a char boundary + None => unsafe { + Ok(( + self.get_unchecked(self.len()..), + self.get_unchecked(..self.len()), + )) + }, + } + } + + fn split_at_position1_complete<P, E: ParseError<Self>>( + &self, + predicate: P, + e: ErrorKind, + ) -> IResult<Self, Self, E> + where + P: Fn(Self::Item) -> bool, + { + match self.find(predicate) { + Some(0) => Err(Err::Error(E::from_error_kind(self, e))), + // find() returns a byte index that is already in the slice at a char boundary + Some(i) => unsafe { Ok((self.get_unchecked(i..), self.get_unchecked(..i))) }, + None => { + if self.is_empty() { + Err(Err::Error(E::from_error_kind(self, e))) + } else { + // the end of slice is a char boundary + unsafe { + Ok(( + self.get_unchecked(self.len()..), + self.get_unchecked(..self.len()), + )) + } + } + } + } + } +} + +/// Indicates whether a comparison was successful, an error, or +/// if more data was needed +#[derive(Debug, PartialEq)] +pub enum CompareResult { + /// Comparison was successful + Ok, + /// We need more data to be sure + Incomplete, + /// Comparison failed + Error, +} + +/// Abstracts comparison operations +pub trait Compare<T> { + /// Compares self to another value for equality + fn compare(&self, t: T) -> CompareResult; + /// Compares self to another value for equality + /// independently of the case. + /// + /// Warning: for `&str`, the comparison is done + /// by lowercasing both strings and comparing + /// the result. This is a temporary solution until + /// a better one appears + fn compare_no_case(&self, t: T) -> CompareResult; +} + +fn lowercase_byte(c: u8) -> u8 { + match c { + b'A'..=b'Z' => c - b'A' + b'a', + _ => c, + } +} + +impl<'a, 'b> Compare<&'b [u8]> for &'a [u8] { + #[inline(always)] + fn compare(&self, t: &'b [u8]) -> CompareResult { + let pos = self.iter().zip(t.iter()).position(|(a, b)| a != b); + + match pos { + Some(_) => CompareResult::Error, + None => { + if self.len() >= t.len() { + CompareResult::Ok + } else { + CompareResult::Incomplete + } + } + } + + /* + let len = self.len(); + let blen = t.len(); + let m = if len < blen { len } else { blen }; + let reduced = &self[..m]; + let b = &t[..m]; + + if reduced != b { + CompareResult::Error + } else if m < blen { + CompareResult::Incomplete + } else { + CompareResult::Ok + } + */ + } + + #[inline(always)] + fn compare_no_case(&self, t: &'b [u8]) -> CompareResult { + if self + .iter() + .zip(t) + .any(|(a, b)| lowercase_byte(*a) != lowercase_byte(*b)) + { + CompareResult::Error + } else if self.len() < t.len() { + CompareResult::Incomplete + } else { + CompareResult::Ok + } + } +} + +impl< + T: InputLength + InputIter<Item = u8> + InputTake + UnspecializedInput, + O: InputLength + InputIter<Item = u8> + InputTake, + > Compare<O> for T +{ + #[inline(always)] + fn compare(&self, t: O) -> CompareResult { + let pos = self + .iter_elements() + .zip(t.iter_elements()) + .position(|(a, b)| a != b); + + match pos { + Some(_) => CompareResult::Error, + None => { + if self.input_len() >= t.input_len() { + CompareResult::Ok + } else { + CompareResult::Incomplete + } + } + } + } + + #[inline(always)] + fn compare_no_case(&self, t: O) -> CompareResult { + if self + .iter_elements() + .zip(t.iter_elements()) + .any(|(a, b)| lowercase_byte(a) != lowercase_byte(b)) + { + CompareResult::Error + } else if self.input_len() < t.input_len() { + CompareResult::Incomplete + } else { + CompareResult::Ok + } + } +} + +impl<'a, 'b> Compare<&'b str> for &'a [u8] { + #[inline(always)] + fn compare(&self, t: &'b str) -> CompareResult { + self.compare(AsBytes::as_bytes(t)) + } + #[inline(always)] + fn compare_no_case(&self, t: &'b str) -> CompareResult { + self.compare_no_case(AsBytes::as_bytes(t)) + } +} + +impl<'a, 'b> Compare<&'b str> for &'a str { + #[inline(always)] + fn compare(&self, t: &'b str) -> CompareResult { + self.as_bytes().compare(t.as_bytes()) + } + + //FIXME: this version is too simple and does not use the current locale + #[inline(always)] + fn compare_no_case(&self, t: &'b str) -> CompareResult { + let pos = self + .chars() + .zip(t.chars()) + .position(|(a, b)| a.to_lowercase().ne(b.to_lowercase())); + + match pos { + Some(_) => CompareResult::Error, + None => { + if self.len() >= t.len() { + CompareResult::Ok + } else { + CompareResult::Incomplete + } + } + } + } +} + +impl<'a, 'b> Compare<&'b [u8]> for &'a str { + #[inline(always)] + fn compare(&self, t: &'b [u8]) -> CompareResult { + AsBytes::as_bytes(self).compare(t) + } + #[inline(always)] + fn compare_no_case(&self, t: &'b [u8]) -> CompareResult { + AsBytes::as_bytes(self).compare_no_case(t) + } +} + +/// Look for a token in self +pub trait FindToken<T> { + /// Returns true if self contains the token + fn find_token(&self, token: T) -> bool; +} + +impl<'a> FindToken<u8> for &'a [u8] { + fn find_token(&self, token: u8) -> bool { + memchr::memchr(token, self).is_some() + } +} + +impl<'a> FindToken<u8> for &'a str { + fn find_token(&self, token: u8) -> bool { + self.as_bytes().find_token(token) + } +} + +impl<'a, 'b> FindToken<&'a u8> for &'b [u8] { + fn find_token(&self, token: &u8) -> bool { + self.find_token(*token) + } +} + +impl<'a, 'b> FindToken<&'a u8> for &'b str { + fn find_token(&self, token: &u8) -> bool { + self.as_bytes().find_token(token) + } +} + +impl<'a> FindToken<char> for &'a [u8] { + fn find_token(&self, token: char) -> bool { + self.iter().any(|i| *i == token as u8) + } +} + +impl<'a> FindToken<char> for &'a str { + fn find_token(&self, token: char) -> bool { + self.chars().any(|i| i == token) + } +} + +impl<'a> FindToken<char> for &'a [char] { + fn find_token(&self, token: char) -> bool { + self.iter().any(|i| *i == token) + } +} + +impl<'a, 'b> FindToken<&'a char> for &'b [char] { + fn find_token(&self, token: &char) -> bool { + self.find_token(*token) + } +} + +/// Look for a substring in self +pub trait FindSubstring<T> { + /// Returns the byte position of the substring if it is found + fn find_substring(&self, substr: T) -> Option<usize>; +} + +impl<'a, 'b> FindSubstring<&'b [u8]> for &'a [u8] { + fn find_substring(&self, substr: &'b [u8]) -> Option<usize> { + if substr.len() > self.len() { + return None; + } + + let (&substr_first, substr_rest) = match substr.split_first() { + Some(split) => split, + // an empty substring is found at position 0 + // This matches the behavior of str.find(""). + None => return Some(0), + }; + + if substr_rest.is_empty() { + return memchr::memchr(substr_first, self); + } + + let mut offset = 0; + let haystack = &self[..self.len() - substr_rest.len()]; + + while let Some(position) = memchr::memchr(substr_first, &haystack[offset..]) { + offset += position; + let next_offset = offset + 1; + if &self[next_offset..][..substr_rest.len()] == substr_rest { + return Some(offset); + } + + offset = next_offset; + } + + None + } +} + +impl<'a, 'b> FindSubstring<&'b str> for &'a [u8] { + fn find_substring(&self, substr: &'b str) -> Option<usize> { + self.find_substring(AsBytes::as_bytes(substr)) + } +} + +impl<'a, 'b> FindSubstring<&'b str> for &'a str { + //returns byte index + fn find_substring(&self, substr: &'b str) -> Option<usize> { + self.find(substr) + } +} + +/// Used to integrate `str`'s `parse()` method +pub trait ParseTo<R> { + /// Succeeds if `parse()` succeeded. The byte slice implementation + /// will first convert it to a `&str`, then apply the `parse()` function + fn parse_to(&self) -> Option<R>; +} + +impl<'a, R: FromStr> ParseTo<R> for &'a [u8] { + fn parse_to(&self) -> Option<R> { + from_utf8(self).ok().and_then(|s| s.parse().ok()) + } +} + +impl<'a, R: FromStr> ParseTo<R> for &'a str { + fn parse_to(&self) -> Option<R> { + self.parse().ok() + } +} + +/// Slicing operations using ranges. +/// +/// This trait is loosely based on +/// `Index`, but can actually return +/// something else than a `&[T]` or `&str` +pub trait Slice<R> { + /// Slices self according to the range argument + fn slice(&self, range: R) -> Self; +} + +macro_rules! impl_fn_slice { + ( $ty:ty ) => { + fn slice(&self, range: $ty) -> Self { + &self[range] + } + }; +} + +macro_rules! slice_range_impl { + ( [ $for_type:ident ], $ty:ty ) => { + impl<'a, $for_type> Slice<$ty> for &'a [$for_type] { + impl_fn_slice!($ty); + } + }; + ( $for_type:ty, $ty:ty ) => { + impl<'a> Slice<$ty> for &'a $for_type { + impl_fn_slice!($ty); + } + }; +} + +macro_rules! slice_ranges_impl { + ( [ $for_type:ident ] ) => { + slice_range_impl! {[$for_type], Range<usize>} + slice_range_impl! {[$for_type], RangeTo<usize>} + slice_range_impl! {[$for_type], RangeFrom<usize>} + slice_range_impl! {[$for_type], RangeFull} + }; + ( $for_type:ty ) => { + slice_range_impl! {$for_type, Range<usize>} + slice_range_impl! {$for_type, RangeTo<usize>} + slice_range_impl! {$for_type, RangeFrom<usize>} + slice_range_impl! {$for_type, RangeFull} + }; +} + +slice_ranges_impl! {str} +slice_ranges_impl! {[T]} + +macro_rules! array_impls { + ($($N:expr)+) => { + $( + impl InputLength for [u8; $N] { + #[inline] + fn input_len(&self) -> usize { + self.len() + } + } + + impl<'a> InputLength for &'a [u8; $N] { + #[inline] + fn input_len(&self) -> usize { + self.len() + } + } + + impl<'a> InputIter for &'a [u8; $N] { + type Item = u8; + type Iter = Enumerate<Self::IterElem>; + type IterElem = Copied<Iter<'a, u8>>; + + fn iter_indices(&self) -> Self::Iter { + (&self[..]).iter_indices() + } + + fn iter_elements(&self) -> Self::IterElem { + (&self[..]).iter_elements() + } + + fn position<P>(&self, predicate: P) -> Option<usize> + where P: Fn(Self::Item) -> bool { + (&self[..]).position(predicate) + } + + fn slice_index(&self, count: usize) -> Result<usize, Needed> { + (&self[..]).slice_index(count) + } + } + + impl<'a> Compare<[u8; $N]> for &'a [u8] { + #[inline(always)] + fn compare(&self, t: [u8; $N]) -> CompareResult { + self.compare(&t[..]) + } + + #[inline(always)] + fn compare_no_case(&self, t: [u8;$N]) -> CompareResult { + self.compare_no_case(&t[..]) + } + } + + impl<'a,'b> Compare<&'b [u8; $N]> for &'a [u8] { + #[inline(always)] + fn compare(&self, t: &'b [u8; $N]) -> CompareResult { + self.compare(&t[..]) + } + + #[inline(always)] + fn compare_no_case(&self, t: &'b [u8;$N]) -> CompareResult { + self.compare_no_case(&t[..]) + } + } + + impl FindToken<u8> for [u8; $N] { + fn find_token(&self, token: u8) -> bool { + memchr::memchr(token, &self[..]).is_some() + } + } + + impl<'a> FindToken<&'a u8> for [u8; $N] { + fn find_token(&self, token: &u8) -> bool { + self.find_token(*token) + } + } + )+ + }; +} + +array_impls! { + 0 1 2 3 4 5 6 7 8 9 + 10 11 12 13 14 15 16 17 18 19 + 20 21 22 23 24 25 26 27 28 29 + 30 31 32 +} + +/// Abstracts something which can extend an `Extend`. +/// Used to build modified input slices in `escaped_transform` +pub trait ExtendInto { + /// The current input type is a sequence of that `Item` type. + /// + /// Example: `u8` for `&[u8]` or `char` for `&str` + type Item; + + /// The type that will be produced + type Extender; + + /// Create a new `Extend` of the correct type + fn new_builder(&self) -> Self::Extender; + /// Accumulate the input into an accumulator + fn extend_into(&self, acc: &mut Self::Extender); +} + +#[cfg(feature = "alloc")] +impl ExtendInto for [u8] { + type Item = u8; + type Extender = Vec<u8>; + + #[inline] + fn new_builder(&self) -> Vec<u8> { + Vec::new() + } + #[inline] + fn extend_into(&self, acc: &mut Vec<u8>) { + acc.extend(self.iter().cloned()); + } +} + +#[cfg(feature = "alloc")] +impl ExtendInto for &[u8] { + type Item = u8; + type Extender = Vec<u8>; + + #[inline] + fn new_builder(&self) -> Vec<u8> { + Vec::new() + } + #[inline] + fn extend_into(&self, acc: &mut Vec<u8>) { + acc.extend_from_slice(self); + } +} + +#[cfg(feature = "alloc")] +impl ExtendInto for str { + type Item = char; + type Extender = String; + + #[inline] + fn new_builder(&self) -> String { + String::new() + } + #[inline] + fn extend_into(&self, acc: &mut String) { + acc.push_str(self); + } +} + +#[cfg(feature = "alloc")] +impl ExtendInto for &str { + type Item = char; + type Extender = String; + + #[inline] + fn new_builder(&self) -> String { + String::new() + } + #[inline] + fn extend_into(&self, acc: &mut String) { + acc.push_str(self); + } +} + +#[cfg(feature = "alloc")] +impl ExtendInto for char { + type Item = char; + type Extender = String; + + #[inline] + fn new_builder(&self) -> String { + String::new() + } + #[inline] + fn extend_into(&self, acc: &mut String) { + acc.push(*self); + } +} + +/// Helper trait to convert numbers to usize. +/// +/// By default, usize implements `From<u8>` and `From<u16>` but not +/// `From<u32>` and `From<u64>` because that would be invalid on some +/// platforms. This trait implements the conversion for platforms +/// with 32 and 64 bits pointer platforms +pub trait ToUsize { + /// converts self to usize + fn to_usize(&self) -> usize; +} + +impl ToUsize for u8 { + #[inline] + fn to_usize(&self) -> usize { + *self as usize + } +} + +impl ToUsize for u16 { + #[inline] + fn to_usize(&self) -> usize { + *self as usize + } +} + +impl ToUsize for usize { + #[inline] + fn to_usize(&self) -> usize { + *self + } +} + +#[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))] +impl ToUsize for u32 { + #[inline] + fn to_usize(&self) -> usize { + *self as usize + } +} + +#[cfg(target_pointer_width = "64")] +impl ToUsize for u64 { + #[inline] + fn to_usize(&self) -> usize { + *self as usize + } +} + +/// Equivalent From implementation to avoid orphan rules in bits parsers +pub trait ErrorConvert<E> { + /// Transform to another error type + fn convert(self) -> E; +} + +impl<I> ErrorConvert<(I, ErrorKind)> for ((I, usize), ErrorKind) { + fn convert(self) -> (I, ErrorKind) { + ((self.0).0, self.1) + } +} + +impl<I> ErrorConvert<((I, usize), ErrorKind)> for (I, ErrorKind) { + fn convert(self) -> ((I, usize), ErrorKind) { + ((self.0, 0), self.1) + } +} + +use crate::error; +impl<I> ErrorConvert<error::Error<I>> for error::Error<(I, usize)> { + fn convert(self) -> error::Error<I> { + error::Error { + input: self.input.0, + code: self.code, + } + } +} + +impl<I> ErrorConvert<error::Error<(I, usize)>> for error::Error<I> { + fn convert(self) -> error::Error<(I, usize)> { + error::Error { + input: (self.input, 0), + code: self.code, + } + } +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +impl<I> ErrorConvert<error::VerboseError<I>> for error::VerboseError<(I, usize)> { + fn convert(self) -> error::VerboseError<I> { + error::VerboseError { + errors: self.errors.into_iter().map(|(i, e)| (i.0, e)).collect(), + } + } +} + +#[cfg(feature = "alloc")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "alloc")))] +impl<I> ErrorConvert<error::VerboseError<(I, usize)>> for error::VerboseError<I> { + fn convert(self) -> error::VerboseError<(I, usize)> { + error::VerboseError { + errors: self.errors.into_iter().map(|(i, e)| ((i, 0), e)).collect(), + } + } +} + +impl ErrorConvert<()> for () { + fn convert(self) {} +} + +#[cfg(feature = "std")] +#[cfg_attr(feature = "docsrs", doc(cfg(feature = "std")))] +/// Helper trait to show a byte slice as a hex dump +pub trait HexDisplay { + /// Converts the value of `self` to a hex dump, returning the owned + /// `String`. + fn to_hex(&self, chunk_size: usize) -> String; + + /// Converts the value of `self` to a hex dump beginning at `from` address, returning the owned + /// `String`. + fn to_hex_from(&self, chunk_size: usize, from: usize) -> String; +} + +#[cfg(feature = "std")] +static CHARS: &[u8] = b"0123456789abcdef"; + +#[cfg(feature = "std")] +impl HexDisplay for [u8] { + #[allow(unused_variables)] + fn to_hex(&self, chunk_size: usize) -> String { + self.to_hex_from(chunk_size, 0) + } + + #[allow(unused_variables)] + fn to_hex_from(&self, chunk_size: usize, from: usize) -> String { + let mut v = Vec::with_capacity(self.len() * 3); + let mut i = from; + for chunk in self.chunks(chunk_size) { + let s = format!("{:08x}", i); + for &ch in s.as_bytes().iter() { + v.push(ch); + } + v.push(b'\t'); + + i += chunk_size; + + for &byte in chunk { + v.push(CHARS[(byte >> 4) as usize]); + v.push(CHARS[(byte & 0xf) as usize]); + v.push(b' '); + } + if chunk_size > chunk.len() { + for j in 0..(chunk_size - chunk.len()) { + v.push(b' '); + v.push(b' '); + v.push(b' '); + } + } + v.push(b'\t'); + + for &byte in chunk { + if (byte >= 32 && byte <= 126) || byte >= 128 { + v.push(byte); + } else { + v.push(b'.'); + } + } + v.push(b'\n'); + } + + String::from_utf8_lossy(&v[..]).into_owned() + } +} + +#[cfg(feature = "std")] +impl HexDisplay for str { + #[allow(unused_variables)] + fn to_hex(&self, chunk_size: usize) -> String { + self.to_hex_from(chunk_size, 0) + } + + #[allow(unused_variables)] + fn to_hex_from(&self, chunk_size: usize, from: usize) -> String { + self.as_bytes().to_hex_from(chunk_size, from) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_offset_u8() { + let s = b"abcd123"; + let a = &s[..]; + let b = &a[2..]; + let c = &a[..4]; + let d = &a[3..5]; + assert_eq!(a.offset(b), 2); + assert_eq!(a.offset(c), 0); + assert_eq!(a.offset(d), 3); + } + + #[test] + fn test_offset_str() { + let s = "abcřèÂßÇd123"; + let a = &s[..]; + let b = &a[7..]; + let c = &a[..5]; + let d = &a[5..9]; + assert_eq!(a.offset(b), 7); + assert_eq!(a.offset(c), 0); + assert_eq!(a.offset(d), 5); + } +} |