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Diffstat (limited to 'third_party/rust/nom/src/error.rs')
| -rw-r--r-- | third_party/rust/nom/src/error.rs | 831 |
1 files changed, 831 insertions, 0 deletions
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() +} +*/ |