From 4f9fe856a25ab29345b90e7725509e9ee38a37be Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:41 +0200 Subject: Adding upstream version 1.69.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/miniz_oxide-0.5.3/src/lib.rs | 208 ++++++++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 vendor/miniz_oxide-0.5.3/src/lib.rs (limited to 'vendor/miniz_oxide-0.5.3/src/lib.rs') diff --git a/vendor/miniz_oxide-0.5.3/src/lib.rs b/vendor/miniz_oxide-0.5.3/src/lib.rs new file mode 100644 index 000000000..8357c5200 --- /dev/null +++ b/vendor/miniz_oxide-0.5.3/src/lib.rs @@ -0,0 +1,208 @@ +//! A pure rust replacement for the [miniz](https://github.com/richgel999/miniz) +//! DEFLATE/zlib encoder/decoder. +//! The plan for this crate is to be used as a back-end for the +//! [flate2](https://github.com/alexcrichton/flate2-rs) crate and eventually remove the +//! need to depend on a C library. +//! +//! # Usage +//! ## Simple compression/decompression: +//! ``` rust +//! +//! use miniz_oxide::inflate::decompress_to_vec; +//! use miniz_oxide::deflate::compress_to_vec; +//! +//! fn roundtrip(data: &[u8]) { +//! let compressed = compress_to_vec(data, 6); +//! let decompressed = decompress_to_vec(compressed.as_slice()).expect("Failed to decompress!"); +//! # let _ = decompressed; +//! } +//! +//! # roundtrip(b"Test_data test data lalalal blabla"); +//! +//! ``` + +#![forbid(unsafe_code)] +#![no_std] + +extern crate alloc; + +pub mod deflate; +pub mod inflate; +mod shared; + +pub use crate::shared::update_adler32 as mz_adler32_oxide; +pub use crate::shared::{MZ_ADLER32_INIT, MZ_DEFAULT_WINDOW_BITS}; + +/// A list of flush types. +/// +/// See for more in-depth info. +#[repr(i32)] +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub enum MZFlush { + /// Don't force any flushing. + /// Used when more input data is expected. + None = 0, + /// Zlib partial flush. + /// Currently treated as [`Sync`]. + Partial = 1, + /// Finish compressing the currently buffered data, and output an empty raw block. + /// Has no use in decompression. + Sync = 2, + /// Same as [`Sync`], but resets the compression dictionary so that further compressed + /// data does not depend on data compressed before the flush. + /// + /// Has no use in decompression, and is an error to supply in that case. + Full = 3, + /// Attempt to flush the remaining data and end the stream. + Finish = 4, + /// Not implemented. + Block = 5, +} + +impl MZFlush { + /// Create an MZFlush value from an integer value. + /// + /// Returns `MZError::Param` on invalid values. + pub fn new(flush: i32) -> Result { + match flush { + 0 => Ok(MZFlush::None), + 1 | 2 => Ok(MZFlush::Sync), + 3 => Ok(MZFlush::Full), + 4 => Ok(MZFlush::Finish), + _ => Err(MZError::Param), + } + } +} + +/// A list of miniz successful status codes. +/// +/// These are emitted as the [`Ok`] side of a [`MZResult`] in the [`StreamResult`] returned from +/// [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`]. +#[repr(i32)] +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub enum MZStatus { + /// Operation succeeded. + /// + /// Some data was decompressed or compressed; see the byte counters in the [`StreamResult`] for + /// details. + Ok = 0, + + /// Operation succeeded and end of deflate stream was found. + /// + /// X-ref [`TINFLStatus::Done`][inflate::TINFLStatus::Done] or + /// [`TDEFLStatus::Done`][deflate::core::TDEFLStatus::Done] for `inflate` or `deflate` + /// respectively. + StreamEnd = 1, + + /// Unused + NeedDict = 2, +} + +/// A list of miniz failed status codes. +/// +/// These are emitted as the [`Err`] side of a [`MZResult`] in the [`StreamResult`] returned from +/// [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`]. +#[repr(i32)] +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub enum MZError { + /// Unused + ErrNo = -1, + + /// General stream error. + /// + /// See [`inflate::stream::inflate()`] docs for details of how it can occur there. + /// + /// See [`deflate::stream::deflate()`] docs for how it can in principle occur there, though it's + /// believed impossible in practice. + Stream = -2, + + /// Error in inflation; see [`inflate::stream::inflate()`] for details. + /// + /// Not returned from [`deflate::stream::deflate()`]. + Data = -3, + + /// Unused + Mem = -4, + + /// Buffer-related error. + /// + /// See the docs of [`deflate::stream::deflate()`] or [`inflate::stream::inflate()`] for details + /// of when it would trigger in the one you're using. + Buf = -5, + + /// Unused + Version = -6, + + /// Bad parameters. + /// + /// This can be returned from [`deflate::stream::deflate()`] in the case of bad parameters. See + /// [`TDEFLStatus::BadParam`][deflate::core::TDEFLStatus::BadParam]. + Param = -10_000, +} + +/// How compressed data is wrapped. +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +#[non_exhaustive] +pub enum DataFormat { + /// Wrapped using the [zlib](http://www.zlib.org/rfc-zlib.html) format. + Zlib, + /// Zlib wrapped but ignore and don't compute the adler32 checksum. + /// Currently only used for inflate, behaves the same as Zlib for compression. + ZLibIgnoreChecksum, + /// Raw DEFLATE. + Raw, +} + +impl DataFormat { + pub(crate) fn from_window_bits(window_bits: i32) -> DataFormat { + if window_bits > 0 { + DataFormat::Zlib + } else { + DataFormat::Raw + } + } + + pub(crate) fn to_window_bits(self) -> i32 { + match self { + DataFormat::Zlib | DataFormat::ZLibIgnoreChecksum => shared::MZ_DEFAULT_WINDOW_BITS, + DataFormat::Raw => -shared::MZ_DEFAULT_WINDOW_BITS, + } + } +} + +/// `Result` alias for all miniz status codes both successful and failed. +pub type MZResult = Result; + +/// A structure containg the result of a call to the inflate or deflate streaming functions. +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub struct StreamResult { + /// The number of bytes consumed from the input slice. + pub bytes_consumed: usize, + /// The number of bytes written to the output slice. + pub bytes_written: usize, + /// The return status of the call. + pub status: MZResult, +} + +impl StreamResult { + #[inline] + pub(crate) const fn error(error: MZError) -> StreamResult { + StreamResult { + bytes_consumed: 0, + bytes_written: 0, + status: Err(error), + } + } +} + +impl core::convert::From for MZResult { + fn from(res: StreamResult) -> Self { + res.status + } +} + +impl core::convert::From<&StreamResult> for MZResult { + fn from(res: &StreamResult) -> Self { + res.status + } +} -- cgit v1.2.3