From a990de90fe41456a23e58bd087d2f107d321f3a1 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Fri, 19 Jul 2024 16:37:58 +0400 Subject: Deleted vendor folder --- vendor/zune-inflate/.cargo-checksum.json | 1 - vendor/zune-inflate/CHANGELOG.md | 46 - vendor/zune-inflate/Cargo.toml | 41 - vendor/zune-inflate/README.md | 120 -- vendor/zune-inflate/src/bitstream.rs | 188 -- vendor/zune-inflate/src/constants.rs | 156 -- vendor/zune-inflate/src/crc.rs | 35 - vendor/zune-inflate/src/crc/crc_tables.rs | 296 ---- vendor/zune-inflate/src/decoder.rs | 1791 -------------------- vendor/zune-inflate/src/encoder.rs | 217 --- .../zune-inflate/src/encoder/fast_match_finder.rs | 11 - vendor/zune-inflate/src/errors.rs | 121 -- vendor/zune-inflate/src/gzip_constants.rs | 13 - vendor/zune-inflate/src/lib.rs | 102 -- vendor/zune-inflate/src/utils.rs | 79 - 15 files changed, 3217 deletions(-) delete mode 100644 vendor/zune-inflate/.cargo-checksum.json delete mode 100644 vendor/zune-inflate/CHANGELOG.md delete mode 100644 vendor/zune-inflate/Cargo.toml delete mode 100644 vendor/zune-inflate/README.md delete mode 100644 vendor/zune-inflate/src/bitstream.rs delete mode 100644 vendor/zune-inflate/src/constants.rs delete mode 100644 vendor/zune-inflate/src/crc.rs delete mode 100644 vendor/zune-inflate/src/crc/crc_tables.rs delete mode 100644 vendor/zune-inflate/src/decoder.rs delete mode 100644 vendor/zune-inflate/src/encoder.rs delete mode 100644 vendor/zune-inflate/src/encoder/fast_match_finder.rs delete mode 100644 vendor/zune-inflate/src/errors.rs delete mode 100644 vendor/zune-inflate/src/gzip_constants.rs delete mode 100644 vendor/zune-inflate/src/lib.rs delete mode 100644 vendor/zune-inflate/src/utils.rs (limited to 'vendor/zune-inflate') diff --git a/vendor/zune-inflate/.cargo-checksum.json b/vendor/zune-inflate/.cargo-checksum.json deleted file mode 100644 index 0eaa963..0000000 --- a/vendor/zune-inflate/.cargo-checksum.json +++ /dev/null @@ -1 +0,0 @@ -{"files":{"CHANGELOG.md":"e82df64959cb3ecd8c54555ff2296157455a52f9c19027a051b6c04b02ca2b6a","Cargo.toml":"f3da162dd3818fcdf23c9ce34930d66064106873a692d6994abd49b80e60ea66","README.md":"ad9675f80fd32f89ceabc856d8e5c4fea145aa8bbbf2cba423fdb3687ac634d9","src/bitstream.rs":"68dc48bb9b3143c7dc3603494cf105585915a7e793d6c0e4d7e7eff18bed59e0","src/constants.rs":"8fe65b0c99f92bdb7ae4918f48047b1ce53dd903f9e8248b6f93797fd9b850b1","src/crc.rs":"a2a2aa0fcf4b668bf99b4e0c9d5e33f9c465acaeec28992dad4469f86f01f37a","src/crc/crc_tables.rs":"6d6c5063e7c66cdd9c179c4ad302eefeb6dfd45e8ee78b21d7026efefeeb1ec3","src/decoder.rs":"dec3511b03a94e4a219e8945f9496200058ae8fc01b39e8b687d05540b544339","src/encoder.rs":"c99d7afda5c50bc52efc5d8e788da6a884d0e13b3b38865f760f5ed3d9fc65bd","src/encoder/fast_match_finder.rs":"67bcc3602a1705dd375128526d99334aee78777dc19bcc622757d78c43af90d6","src/errors.rs":"86ed95b4ac51a8d57dff8bac9c324f793d15d74e334fcc6d9822ad5ee531f919","src/gzip_constants.rs":"5c4c08a010470817f671b4dee8657ee65e35a1f76132da0ddd8872c24df4dc5c","src/lib.rs":"ee2b5b58f48ee36835bd4e312a26dace36be39d1c4af956f4e2e04d0620667f9","src/utils.rs":"5a72c84c72273dea894b05fb4dbc4d8690c1ace859fe1d16a702a93158326fa0"},"package":"73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"} \ No newline at end of file diff --git a/vendor/zune-inflate/CHANGELOG.md b/vendor/zune-inflate/CHANGELOG.md deleted file mode 100644 index 1d9c6fb..0000000 --- a/vendor/zune-inflate/CHANGELOG.md +++ /dev/null @@ -1,46 +0,0 @@ -## Version 0.2.54 - -- Add simple encoder -- Fix no_std compilation - -## Version 0.2.52 - -- Add small fix for refilling where the decoder lacked bits - -## Version 0.2.51 - -- Correctly check for limits in the inner loop - -## Version 0.2.0 - -- Initial release - -## Version 0.2.1 - -- Fix bug where raw deflate outputs would cause errors. - -## Version 0.2.2 - -- Fix bug in which some paths would cause the stream not to refill - -## Version 0.2.3 - -- Small performance improvements, especially on files with a lot of RLE redundant data - -## Version 0.2.4 - -- Fix bug with some gzip that would cause errors during decoding -- Small performance improvement - -## Version 0.2.41 - -- Improve documentation of exposed values - -## Version 0.2.42 - -- Remove broken links in README. - -## Version 0.2.50 - -- Mark library as `#[no_std]` -- Impl `std::error::Error` for library \ No newline at end of file diff --git a/vendor/zune-inflate/Cargo.toml b/vendor/zune-inflate/Cargo.toml deleted file mode 100644 index 811126b..0000000 --- a/vendor/zune-inflate/Cargo.toml +++ /dev/null @@ -1,41 +0,0 @@ -# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO -# -# When uploading crates to the registry Cargo will automatically -# "normalize" Cargo.toml files for maximal compatibility -# with all versions of Cargo and also rewrite `path` dependencies -# to registry (e.g., crates.io) dependencies. -# -# If you are reading this file be aware that the original Cargo.toml -# will likely look very different (and much more reasonable). -# See Cargo.toml.orig for the original contents. - -[package] -edition = "2021" -name = "zune-inflate" -version = "0.2.54" -exclude = ["tests/"] -description = "A heavily optimized deflate decompressor in Pure Rust" -homepage = "https://github.com/etemesi254/zune-image/tree/main/zune-inflate" -readme = "README.md" -keywords = [ - "compression", - "inflate", - "deflate", -] -categories = ["compression"] -license = "MIT OR Apache-2.0 OR Zlib" - -[dependencies.simd-adler32] -version = "0.3.4" -optional = true -default-features = false - -[features] -default = [ - "zlib", - "gzip", - "std", -] -gzip = [] -std = ["simd-adler32/std"] -zlib = ["simd-adler32"] diff --git a/vendor/zune-inflate/README.md b/vendor/zune-inflate/README.md deleted file mode 100644 index 21b5850..0000000 --- a/vendor/zune-inflate/README.md +++ /dev/null @@ -1,120 +0,0 @@ -# zune-inflate - -This crate features an optimized inflate algorithm supporting -whole buffer decompression. - -Supported formats are - -- raw deflate -- zlib (deflate with a zlib wrapper on) -- gzip - -The implementation is heavily based on Eric Biggers [libdeflate] and hence -has similar characteristics. - -Specifically, we do not support streaming decompression but prefer whole buffer decompression. - -## Installation - -To use in your crate, simply add the following in your -Cargo.toml - -```toml -[dependencies] -#other amazing crates from other amazing people -zune-inflate = "0.2.0" -``` - -## Features - -One can enable or disable a specific format using -cargo features. - -Specifically, the following can be enabled - -- `gzip`: Enable decompressing of gzip encoded data -- `zlib`: Enable decompressing of zlib encoded data - -To enable one feature, modify `Cargo.toml` entry to be - -```toml -[dependencies] -zune-inflate = { version = "0.2", default-features = false, features = ["#ADD_SPECIFIC_FEATURE"] } -``` - -## Usage. - -The library exposes a simple API for decompressing -data, and depending on what type of data you have, you typically choose -one of the `decode[_suffix]` function to decode your data - -The decompressor expects the whole buffer handed upfront - -### Decoding raw deflate - -To decode raw deflate data, the following code should get you -started. - -```rust -use zune_inflate::DeflateDecoder; -let totally_valid_data = [0; 23]; -let mut decoder = DeflateDecoder::new( & totally_valid_data); -// panic on errors, because that's the cool way to go -let decompressed_data = decoder.decode_deflate().unwrap(); -``` - -### Decoding zlib - -To decode deflate data wrapped in zlib, the following code should get you -started. - -```rust -use zune_inflate::DeflateDecoder; -let totally_valid_data = [0; 23]; -let mut decoder = DeflateDecoder::new( & totally_valid_data); -// panic on errors, because that's the cool way to go -let decompressed_data = decoder.decode_zlib().unwrap(); -``` - -### Advanced usage - -There are advanced options specified by `DeflateOptions` which can change -decompression settings. - -## Comparisions. - -I'll compare this with `flate2` with `miniz-oxide` backend. - -| feature | `zune-inflate` | `flate2` | -|-------------------------|----------------|-------------------| -| zlib decompression | yes | yes | -| delfate decompression | yes | yes | -| gzip | yes | yes | -| compression | soon | yes | -| streaming decompression | no | yes | -| **unsafe** | no | yes[1] | - -[1] Flate writes to an uninitialized buffer - -As you can see, there are some concrete features we currently lack when compared to -flate2/miniz-oxide. - -There's actually nothing riding in for us, except...it's wickedly fast... - -### Benchmarks - -Up-to date benchmarks are done using criterion and hosted online at [zune-benchmarks] site, -benchmarks for this library have the `inflate: ` prefix. - - -## Fuzzing - -The decoder is currently fuzzed for correctness by both `miniz-oxide` and `zlib-ng`, see the fuzz/src directory - -[libdeflater]: https://github.com/adamkewley/libdeflater - -[libdeflate]:https://github.com/ebiggers/libdeflate - -[criterion]:https://github.com/bheisler/criterion.rs - -[zune-benchmarks]:https://etemesi254.github.io/posts/Zune-Benchmarks/ \ No newline at end of file diff --git a/vendor/zune-inflate/src/bitstream.rs b/vendor/zune-inflate/src/bitstream.rs deleted file mode 100644 index ff55e52..0000000 --- a/vendor/zune-inflate/src/bitstream.rs +++ /dev/null @@ -1,188 +0,0 @@ -//! `BitStreamReader` API -//! -//! This module provides an interface to read and write bits (and bytes) for -//! huffman - -pub struct BitStreamReader<'src> -{ - // buffer from which we are pulling in bits from - // used in decompression. - pub src: &'src [u8], - // position in our buffer, - pub position: usize, - pub bits_left: u8, - pub buffer: u64, - pub over_read: usize -} - -impl<'src> BitStreamReader<'src> -{ - /// Create a new `BitStreamReader` instance - /// - /// # Expectations - /// The buffer must be padded with fill bytes in the end, - /// if not, this becomes UB in the refill phase. - pub fn new(in_buffer: &'src [u8]) -> BitStreamReader<'src> - { - BitStreamReader { - bits_left: 0, - buffer: 0, - src: in_buffer, - position: 0, - over_read: 0 - } - } - /// Refill the bitstream ensuring the buffer has bits between - /// 56 and 63. - /// - #[inline(always)] - pub fn refill(&mut self) - { - /* - * The refill always guarantees refills between 56-63 - * - * Bits stored will never go above 63 and if bits are in the range 56-63 no refills occur. - */ - let mut buf = [0; 8]; - - match self.src.get(self.position..self.position + 8) - { - Some(bytes) => - { - buf.copy_from_slice(bytes); - // create a u64 from an array of u8's - let new_buffer = u64::from_le_bytes(buf); - // num indicates how many bytes we actually consumed. - let num = 63 ^ self.bits_left; - // offset position - self.position += (num >> 3) as usize; - // shift number of bits - self.buffer |= new_buffer << self.bits_left; - // update bits left - // bits left are now between 56-63 - self.bits_left |= 56; - } - None => self.refill_slow() - } - } - #[inline(always)] - pub fn refill_inner_loop(&mut self) - { - /* - * The refill always guarantees refills between 56-63 - * - * Bits stored will never go above 63 and if bits are in the range 56-63 no refills occur. - */ - let mut buf = [0; 8]; - - if let Some(bytes) = self.src.get(self.position..self.position + 8) - { - { - buf.copy_from_slice(bytes); - // create a u64 from an array of u8's - let new_buffer = u64::from_le_bytes(buf); - // num indicates how many bytes we actually consumed. - let num = 63 ^ self.bits_left; - // offset position - self.position += (num >> 3) as usize; - // shift number of bits - self.buffer |= new_buffer << self.bits_left; - // update bits left - // bits left are now between 56-63 - self.bits_left |= 56; - } - } - } - #[inline(never)] - fn refill_slow(&mut self) - { - let bytes = &self.src[self.position..]; - - for byte in bytes - { - if self.bits_left >= 56 - { - break; - } - - self.buffer |= u64::from(*byte) << self.bits_left; - self.bits_left += 8; - self.position += 1; - } - while self.bits_left < 56 - { - self.bits_left += 8; - self.over_read += 1; - } - } - - #[inline(always)] - pub fn peek_bits(&self) -> usize - { - debug_assert!(self.bits_left >= LOOKAHEAD as u8); - (self.buffer & ((1 << LOOKAHEAD) - 1)) as usize - } - #[inline(always)] - pub fn peek_var_bits(&self, lookahead: usize) -> usize - { - debug_assert!(self.bits_left >= lookahead as u8); - (self.buffer & ((1 << lookahead) - 1)) as usize - } - - #[inline(always)] - pub fn get_bits(&mut self, num_bits: u8) -> u64 - { - debug_assert!(self.bits_left >= num_bits); - - let mask = (1_u64 << num_bits) - 1; - - let value = self.buffer & mask; - - self.buffer >>= num_bits; - - self.bits_left -= num_bits; - - value - } - /// Get number of bits left in the bit buffer. - pub const fn get_bits_left(&self) -> u8 - { - self.bits_left - } - /// Get position the stream is in this buffer - /// Or alternatively, number of bits read. - pub fn get_position(&self) -> usize - { - self.position - .saturating_sub(usize::from(self.bits_left >> 3)) - } - - /// Reset buffer and bits left to zero. - pub fn reset(&mut self) - { - self.buffer = 0; - self.bits_left = 0; - } - /// Return true if the bit buffer can satisfy - /// `bits` read without refilling, - pub const fn has(&self, bits: u8) -> bool - { - self.bits_left >= bits - } - - #[inline(always)] - pub fn drop_bits(&mut self, bits: u8) - { - debug_assert!(self.bits_left >= bits); - self.bits_left -= bits; - self.buffer >>= bits; - } - /// Return the remaining bytes in this stream. - /// - /// This does not consider bits in the bit-buffer hence - /// may not be accurate - pub const fn remaining_bytes(&self) -> usize - { - self.src.len().saturating_sub(self.position) - } -} diff --git a/vendor/zune-inflate/src/constants.rs b/vendor/zune-inflate/src/constants.rs deleted file mode 100644 index 260fe5b..0000000 --- a/vendor/zune-inflate/src/constants.rs +++ /dev/null @@ -1,156 +0,0 @@ -use crate::utils::const_min_usize; - -/// Number of symbols in each Huffman code. Note: for the literal/length -/// and offset codes, these are actually the maximum values; a given block -/// might use fewer symbols. -pub const DEFLATE_NUM_PRECODE_SYMS: usize = 19; -pub const DEFLATE_NUM_LITLEN_SYMS: usize = 288; -pub const DEFLATE_NUM_OFFSET_SYMS: usize = 32; - -/// Maximum possible overrun when decoding codeword lengths -pub const DELFATE_MAX_LENS_OVERRUN: usize = 137; - -/// Order which precode lengths are stored -pub static DEFLATE_PRECODE_LENS_PERMUTATION: [u8; DEFLATE_NUM_PRECODE_SYMS] = [ - 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 -]; - -pub const PRECODE_ENOUGH: usize = 128; - -/// Maximum codeword length across all codes. -pub const DEFLATE_MAX_CODEWORD_LENGTH: usize = 15; - -pub const DEFLATE_MAX_OFFSET_CODEWORD_LENGTH: usize = 15; -pub const DEFLATE_MAX_LITLEN_CODEWORD_LENGTH: usize = 15; - -pub const PRECODE_TABLE_BITS: usize = 7; - -pub const LITLEN_TABLE_BITS: usize = 11; -pub const LITLEN_ENOUGH: usize = 2342; -/// Maximum bits found in the lookup table for offsets -/// offsets larger than this require a lookup into a sub-table -pub const OFFSET_TABLEBITS: usize = 8; -/// Note, default libdeflate value is 402, but with 512, -/// we can remove a branch check by simply doing & 511, and I'll take that. -pub const OFFSET_ENOUGH: usize = 512; -/// Maximum number of symbols across all codes -pub const DEFLATE_MAX_NUM_SYMS: usize = 288; - -///Maximum codeword length in bits for each precode -pub const DEFLATE_MAX_PRE_CODEWORD_LEN: u8 = 7; - -/// Format for precode decode table entries, Bits not explicitly contain zeroes -/// -/// 20-16: presym -/// 10-8 Codeword length(not used) -/// Bit 2-0 Codeword length -/// -/// It never has sub-tables since we use PRECODE_TABLEBITS == MAX_PRECODEWORD_LENGTH -/// -/// PRECODE_DECODE_RESULTS contains static parts of the entry for each symbol, -/// make_decode_table_entry produces the final results -pub static PRECODE_DECODE_RESULTS: [u32; 19] = make_precode_static_table(); - -const fn make_precode_static_table() -> [u32; 19] -{ - let mut table: [u32; 19] = [0; 19]; - let mut i = 0; - - while i < 19 - { - table[i] = (i as u32) << 16; - i += 1; - } - - table -} - -/// Presence of a literal entry -pub const HUFFDEC_LITERAL: u32 = 0x80000000; -/// Presence of HUFFDEC_SUITABLE_POINTER or HUFFDEC_END_OF_BLOCK -pub const HUFFDEC_EXCEPTIONAL: u32 = 0x00008000; -/// Pointer entry in the litlen or offset decode table -pub const HUFFDEC_SUITABLE_POINTER: u32 = 0x00004000; -/// End of block entry in litlen decode table -pub const HUFFDEC_END_OF_BLOCK: u32 = 0x00002000; - -#[rustfmt::skip] -#[allow(clippy::zero_prefixed_literal)] -const fn construct_litlen_decode_table() -> [u32; 288] -{ - let mut results: [u32; 288] = [0; 288]; - let mut i = 0; - - while i < 256 - { - results[i] = ((i as u32) << 16) | HUFFDEC_LITERAL; - i += 1; - } - - results[i] = HUFFDEC_EXCEPTIONAL | HUFFDEC_END_OF_BLOCK; - i += 1; - - - let base_and_bits_tables = [ - (003, 0), (004, 0), (005, 0), (006, 0), - (007, 0), (008, 0), (009, 0), (010, 0), - (011, 1), (013, 1), (015, 1), (017, 1), - (019, 2), (023, 2), (027, 2), (031, 2), - (035, 3), (043, 3), (051, 3), (059, 3), - (067, 4), (083, 4), (099, 4), (115, 4), - (131, 5), (163, 5), (195, 5), (227, 5), - (258, 0), (258, 0), (258, 0), - ]; - let mut j = 0; - - while i < 288 - { - let (length_base, extra_bits) = base_and_bits_tables[j]; - results[i] = (length_base << 16) | extra_bits; - - i += 1; - j += 1; - } - - results -} - -const fn entry(base: u32, extra: u32) -> u32 -{ - base << 16 | extra -} - -#[rustfmt::skip] -#[allow(clippy::zero_prefixed_literal)] // the things we do for alignment -pub static OFFSET_DECODE_RESULTS: [u32; 32] = [ - entry(00001, 00), entry(00002, 00), entry(00003, 00), entry(00004, 00), - entry(00005, 01), entry(00007, 01), entry(00009, 02), entry(00013, 02), - entry(00017, 03), entry(00025, 03), entry(00033, 04), entry(00049, 04), - entry(00065, 05), entry(00097, 05), entry(00129, 06), entry(00193, 06), - entry(00257, 07), entry(00385, 07), entry(00513, 08), entry(00769, 08), - entry(01025, 09), entry(01537, 09), entry(02049, 10), entry(03073, 10), - entry(04097, 11), entry(06145, 11), entry(08193, 12), entry(12289, 12), - entry(16385, 13), entry(24577, 13), entry(24577, 13), entry(24577, 13), -]; - -pub static LITLEN_DECODE_RESULTS: [u32; 288] = construct_litlen_decode_table(); - -pub const DEFLATE_BLOCKTYPE_DYNAMIC_HUFFMAN: u64 = 2; - -pub const DEFLATE_BLOCKTYPE_UNCOMPRESSED: u64 = 0; -pub const DEFLATE_BLOCKTYPE_RESERVED: u64 = 3; - -pub const DEFLATE_BLOCKTYPE_STATIC: u64 = 1; - -pub const LITLEN_DECODE_BITS: usize = - const_min_usize(DEFLATE_MAX_LITLEN_CODEWORD_LENGTH, LITLEN_TABLE_BITS); - -/// Maximum length of a deflate match -pub const DEFLATE_MAX_MATCH_LEN: usize = 258; - -/// Number of bytes copied per every loop -pub const FASTCOPY_BYTES: usize = 16; - -/// Worst case maximum number of output bytes writtern during each iteration of the -/// fastloop. -pub const FASTLOOP_MAX_BYTES_WRITTEN: usize = 6 + DEFLATE_MAX_MATCH_LEN + (2 * FASTCOPY_BYTES); diff --git a/vendor/zune-inflate/src/crc.rs b/vendor/zune-inflate/src/crc.rs deleted file mode 100644 index 7c01127..0000000 --- a/vendor/zune-inflate/src/crc.rs +++ /dev/null @@ -1,35 +0,0 @@ -#![cfg(feature = "gzip")] - -use crate::crc::crc_tables::{CRC32_SLICE1_TABLE, CRC32_SLICE8_TABLE}; - -mod crc_tables; - -/// Calculate crc for a data and an initial crc value -#[allow(clippy::identity_op, clippy::zero_prefixed_literal)] -pub fn crc32(data: &[u8], mut crc: u32) -> u32 -{ - // main loop - for chunk in data.chunks_exact(8) - { - let chunk_loaded = u64::from_le_bytes(chunk.try_into().unwrap()); - - let v1 = (chunk_loaded & u64::from(u32::MAX)) as u32; - let v2 = (chunk_loaded >> 32) as u32; - - crc = CRC32_SLICE8_TABLE[0x700 + (((crc ^ v1) >> 00) & 0xFF) as usize] - ^ CRC32_SLICE8_TABLE[0x600 + (((crc ^ v1) >> 08) & 0xFF) as usize] - ^ CRC32_SLICE8_TABLE[0x500 + (((crc ^ v1) >> 16) & 0xFF) as usize] - ^ CRC32_SLICE8_TABLE[0x400 + (((crc ^ v1) >> 24) & 0xFF) as usize] - ^ CRC32_SLICE8_TABLE[0x300 + (((v2 >> 00) & 0xFF) as usize)] - ^ CRC32_SLICE8_TABLE[0x200 + (((v2 >> 08) & 0xFF) as usize)] - ^ CRC32_SLICE8_TABLE[0x100 + (((v2 >> 16) & 0xFF) as usize)] - ^ CRC32_SLICE8_TABLE[0x000 + (((v2 >> 24) & 0xFF) as usize)]; - } - // handle remainder - for remainder in data.chunks_exact(8).remainder() - { - crc = (crc >> 8) ^ CRC32_SLICE1_TABLE[((crc & 0xFF) ^ u32::from(*remainder)) as usize]; - } - - crc -} diff --git a/vendor/zune-inflate/src/crc/crc_tables.rs b/vendor/zune-inflate/src/crc/crc_tables.rs deleted file mode 100644 index 664a76c..0000000 --- a/vendor/zune-inflate/src/crc/crc_tables.rs +++ /dev/null @@ -1,296 +0,0 @@ -//! crc tables- Data tables for CRC32 computation -//! Gotten from Eric Biggers libdeflate. - -pub static CRC32_SLICE1_TABLE: [u32; 256] = [ - 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, - 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, - 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, - 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, - 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, - 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, - 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, - 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, - 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, - 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, - 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, - 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, - 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, - 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, - 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, - 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, - 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, - 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, - 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, - 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, - 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, - 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, - 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, - 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, - 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, - 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, - 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, - 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, - 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, - 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, - 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, - 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d -]; - -pub static CRC32_SLICE8_TABLE: [u32; 2048] = [ - 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, - 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, - 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, - 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, - 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, - 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, - 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, - 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, - 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, - 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, - 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, - 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, - 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, - 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, - 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, - 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, - 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, - 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, - 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, - 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, - 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, - 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, - 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, - 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, - 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, - 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, - 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, - 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, - 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, - 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, - 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, - 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, - 0x00000000, 0x191b3141, 0x32366282, 0x2b2d53c3, 0x646cc504, 0x7d77f445, 0x565aa786, 0x4f4196c7, - 0xc8d98a08, 0xd1c2bb49, 0xfaefe88a, 0xe3f4d9cb, 0xacb54f0c, 0xb5ae7e4d, 0x9e832d8e, 0x87981ccf, - 0x4ac21251, 0x53d92310, 0x78f470d3, 0x61ef4192, 0x2eaed755, 0x37b5e614, 0x1c98b5d7, 0x05838496, - 0x821b9859, 0x9b00a918, 0xb02dfadb, 0xa936cb9a, 0xe6775d5d, 0xff6c6c1c, 0xd4413fdf, 0xcd5a0e9e, - 0x958424a2, 0x8c9f15e3, 0xa7b24620, 0xbea97761, 0xf1e8e1a6, 0xe8f3d0e7, 0xc3de8324, 0xdac5b265, - 0x5d5daeaa, 0x44469feb, 0x6f6bcc28, 0x7670fd69, 0x39316bae, 0x202a5aef, 0x0b07092c, 0x121c386d, - 0xdf4636f3, 0xc65d07b2, 0xed705471, 0xf46b6530, 0xbb2af3f7, 0xa231c2b6, 0x891c9175, 0x9007a034, - 0x179fbcfb, 0x0e848dba, 0x25a9de79, 0x3cb2ef38, 0x73f379ff, 0x6ae848be, 0x41c51b7d, 0x58de2a3c, - 0xf0794f05, 0xe9627e44, 0xc24f2d87, 0xdb541cc6, 0x94158a01, 0x8d0ebb40, 0xa623e883, 0xbf38d9c2, - 0x38a0c50d, 0x21bbf44c, 0x0a96a78f, 0x138d96ce, 0x5ccc0009, 0x45d73148, 0x6efa628b, 0x77e153ca, - 0xbabb5d54, 0xa3a06c15, 0x888d3fd6, 0x91960e97, 0xded79850, 0xc7cca911, 0xece1fad2, 0xf5facb93, - 0x7262d75c, 0x6b79e61d, 0x4054b5de, 0x594f849f, 0x160e1258, 0x0f152319, 0x243870da, 0x3d23419b, - 0x65fd6ba7, 0x7ce65ae6, 0x57cb0925, 0x4ed03864, 0x0191aea3, 0x188a9fe2, 0x33a7cc21, 0x2abcfd60, - 0xad24e1af, 0xb43fd0ee, 0x9f12832d, 0x8609b26c, 0xc94824ab, 0xd05315ea, 0xfb7e4629, 0xe2657768, - 0x2f3f79f6, 0x362448b7, 0x1d091b74, 0x04122a35, 0x4b53bcf2, 0x52488db3, 0x7965de70, 0x607eef31, - 0xe7e6f3fe, 0xfefdc2bf, 0xd5d0917c, 0xcccba03d, 0x838a36fa, 0x9a9107bb, 0xb1bc5478, 0xa8a76539, - 0x3b83984b, 0x2298a90a, 0x09b5fac9, 0x10aecb88, 0x5fef5d4f, 0x46f46c0e, 0x6dd93fcd, 0x74c20e8c, - 0xf35a1243, 0xea412302, 0xc16c70c1, 0xd8774180, 0x9736d747, 0x8e2de606, 0xa500b5c5, 0xbc1b8484, - 0x71418a1a, 0x685abb5b, 0x4377e898, 0x5a6cd9d9, 0x152d4f1e, 0x0c367e5f, 0x271b2d9c, 0x3e001cdd, - 0xb9980012, 0xa0833153, 0x8bae6290, 0x92b553d1, 0xddf4c516, 0xc4eff457, 0xefc2a794, 0xf6d996d5, - 0xae07bce9, 0xb71c8da8, 0x9c31de6b, 0x852aef2a, 0xca6b79ed, 0xd37048ac, 0xf85d1b6f, 0xe1462a2e, - 0x66de36e1, 0x7fc507a0, 0x54e85463, 0x4df36522, 0x02b2f3e5, 0x1ba9c2a4, 0x30849167, 0x299fa026, - 0xe4c5aeb8, 0xfdde9ff9, 0xd6f3cc3a, 0xcfe8fd7b, 0x80a96bbc, 0x99b25afd, 0xb29f093e, 0xab84387f, - 0x2c1c24b0, 0x350715f1, 0x1e2a4632, 0x07317773, 0x4870e1b4, 0x516bd0f5, 0x7a468336, 0x635db277, - 0xcbfad74e, 0xd2e1e60f, 0xf9ccb5cc, 0xe0d7848d, 0xaf96124a, 0xb68d230b, 0x9da070c8, 0x84bb4189, - 0x03235d46, 0x1a386c07, 0x31153fc4, 0x280e0e85, 0x674f9842, 0x7e54a903, 0x5579fac0, 0x4c62cb81, - 0x8138c51f, 0x9823f45e, 0xb30ea79d, 0xaa1596dc, 0xe554001b, 0xfc4f315a, 0xd7626299, 0xce7953d8, - 0x49e14f17, 0x50fa7e56, 0x7bd72d95, 0x62cc1cd4, 0x2d8d8a13, 0x3496bb52, 0x1fbbe891, 0x06a0d9d0, - 0x5e7ef3ec, 0x4765c2ad, 0x6c48916e, 0x7553a02f, 0x3a1236e8, 0x230907a9, 0x0824546a, 0x113f652b, - 0x96a779e4, 0x8fbc48a5, 0xa4911b66, 0xbd8a2a27, 0xf2cbbce0, 0xebd08da1, 0xc0fdde62, 0xd9e6ef23, - 0x14bce1bd, 0x0da7d0fc, 0x268a833f, 0x3f91b27e, 0x70d024b9, 0x69cb15f8, 0x42e6463b, 0x5bfd777a, - 0xdc656bb5, 0xc57e5af4, 0xee530937, 0xf7483876, 0xb809aeb1, 0xa1129ff0, 0x8a3fcc33, 0x9324fd72, - 0x00000000, 0x01c26a37, 0x0384d46e, 0x0246be59, 0x0709a8dc, 0x06cbc2eb, 0x048d7cb2, 0x054f1685, - 0x0e1351b8, 0x0fd13b8f, 0x0d9785d6, 0x0c55efe1, 0x091af964, 0x08d89353, 0x0a9e2d0a, 0x0b5c473d, - 0x1c26a370, 0x1de4c947, 0x1fa2771e, 0x1e601d29, 0x1b2f0bac, 0x1aed619b, 0x18abdfc2, 0x1969b5f5, - 0x1235f2c8, 0x13f798ff, 0x11b126a6, 0x10734c91, 0x153c5a14, 0x14fe3023, 0x16b88e7a, 0x177ae44d, - 0x384d46e0, 0x398f2cd7, 0x3bc9928e, 0x3a0bf8b9, 0x3f44ee3c, 0x3e86840b, 0x3cc03a52, 0x3d025065, - 0x365e1758, 0x379c7d6f, 0x35dac336, 0x3418a901, 0x3157bf84, 0x3095d5b3, 0x32d36bea, 0x331101dd, - 0x246be590, 0x25a98fa7, 0x27ef31fe, 0x262d5bc9, 0x23624d4c, 0x22a0277b, 0x20e69922, 0x2124f315, - 0x2a78b428, 0x2bbade1f, 0x29fc6046, 0x283e0a71, 0x2d711cf4, 0x2cb376c3, 0x2ef5c89a, 0x2f37a2ad, - 0x709a8dc0, 0x7158e7f7, 0x731e59ae, 0x72dc3399, 0x7793251c, 0x76514f2b, 0x7417f172, 0x75d59b45, - 0x7e89dc78, 0x7f4bb64f, 0x7d0d0816, 0x7ccf6221, 0x798074a4, 0x78421e93, 0x7a04a0ca, 0x7bc6cafd, - 0x6cbc2eb0, 0x6d7e4487, 0x6f38fade, 0x6efa90e9, 0x6bb5866c, 0x6a77ec5b, 0x68315202, 0x69f33835, - 0x62af7f08, 0x636d153f, 0x612bab66, 0x60e9c151, 0x65a6d7d4, 0x6464bde3, 0x662203ba, 0x67e0698d, - 0x48d7cb20, 0x4915a117, 0x4b531f4e, 0x4a917579, 0x4fde63fc, 0x4e1c09cb, 0x4c5ab792, 0x4d98dda5, - 0x46c49a98, 0x4706f0af, 0x45404ef6, 0x448224c1, 0x41cd3244, 0x400f5873, 0x4249e62a, 0x438b8c1d, - 0x54f16850, 0x55330267, 0x5775bc3e, 0x56b7d609, 0x53f8c08c, 0x523aaabb, 0x507c14e2, 0x51be7ed5, - 0x5ae239e8, 0x5b2053df, 0x5966ed86, 0x58a487b1, 0x5deb9134, 0x5c29fb03, 0x5e6f455a, 0x5fad2f6d, - 0xe1351b80, 0xe0f771b7, 0xe2b1cfee, 0xe373a5d9, 0xe63cb35c, 0xe7fed96b, 0xe5b86732, 0xe47a0d05, - 0xef264a38, 0xeee4200f, 0xeca29e56, 0xed60f461, 0xe82fe2e4, 0xe9ed88d3, 0xebab368a, 0xea695cbd, - 0xfd13b8f0, 0xfcd1d2c7, 0xfe976c9e, 0xff5506a9, 0xfa1a102c, 0xfbd87a1b, 0xf99ec442, 0xf85cae75, - 0xf300e948, 0xf2c2837f, 0xf0843d26, 0xf1465711, 0xf4094194, 0xf5cb2ba3, 0xf78d95fa, 0xf64fffcd, - 0xd9785d60, 0xd8ba3757, 0xdafc890e, 0xdb3ee339, 0xde71f5bc, 0xdfb39f8b, 0xddf521d2, 0xdc374be5, - 0xd76b0cd8, 0xd6a966ef, 0xd4efd8b6, 0xd52db281, 0xd062a404, 0xd1a0ce33, 0xd3e6706a, 0xd2241a5d, - 0xc55efe10, 0xc49c9427, 0xc6da2a7e, 0xc7184049, 0xc25756cc, 0xc3953cfb, 0xc1d382a2, 0xc011e895, - 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0x123e1c2f, 0xd962cf8a, 0x5ff6bd24, 0x94aa6e81, 0x89af5e39, 0x42f38d9c, 0xc467ff32, 0x0f3b2c97, - 0xfe6d9e42, 0x35314de7, 0xb3a53f49, 0x78f9ecec, 0x65fcdc54, 0xaea00ff1, 0x28347d5f, 0xe368aefa, - 0x16441b82, 0xdd18c827, 0x5b8cba89, 0x90d0692c, 0x8dd55994, 0x46898a31, 0xc01df89f, 0x0b412b3a, - 0xfa1799ef, 0x314b4a4a, 0xb7df38e4, 0x7c83eb41, 0x6186dbf9, 0xaada085c, 0x2c4e7af2, 0xe712a957, - 0x15921919, 0xdececabc, 0x585ab812, 0x93066bb7, 0x8e035b0f, 0x455f88aa, 0xc3cbfa04, 0x089729a1, - 0xf9c19b74, 0x329d48d1, 0xb4093a7f, 0x7f55e9da, 0x6250d962, 0xa90c0ac7, 0x2f987869, 0xe4c4abcc, - 0x00000000, 0xa6770bb4, 0x979f1129, 0x31e81a9d, 0xf44f2413, 0x52382fa7, 0x63d0353a, 0xc5a73e8e, - 0x33ef4e67, 0x959845d3, 0xa4705f4e, 0x020754fa, 0xc7a06a74, 0x61d761c0, 0x503f7b5d, 0xf64870e9, - 0x67de9cce, 0xc1a9977a, 0xf0418de7, 0x56368653, 0x9391b8dd, 0x35e6b369, 0x040ea9f4, 0xa279a240, - 0x5431d2a9, 0xf246d91d, 0xc3aec380, 0x65d9c834, 0xa07ef6ba, 0x0609fd0e, 0x37e1e793, 0x9196ec27, - 0xcfbd399c, 0x69ca3228, 0x582228b5, 0xfe552301, 0x3bf21d8f, 0x9d85163b, 0xac6d0ca6, 0x0a1a0712, - 0xfc5277fb, 0x5a257c4f, 0x6bcd66d2, 0xcdba6d66, 0x081d53e8, 0xae6a585c, 0x9f8242c1, 0x39f54975, - 0xa863a552, 0x0e14aee6, 0x3ffcb47b, 0x998bbfcf, 0x5c2c8141, 0xfa5b8af5, 0xcbb39068, 0x6dc49bdc, - 0x9b8ceb35, 0x3dfbe081, 0x0c13fa1c, 0xaa64f1a8, 0x6fc3cf26, 0xc9b4c492, 0xf85cde0f, 0x5e2bd5bb, - 0x440b7579, 0xe27c7ecd, 0xd3946450, 0x75e36fe4, 0xb044516a, 0x16335ade, 0x27db4043, 0x81ac4bf7, - 0x77e43b1e, 0xd19330aa, 0xe07b2a37, 0x460c2183, 0x83ab1f0d, 0x25dc14b9, 0x14340e24, 0xb2430590, - 0x23d5e9b7, 0x85a2e203, 0xb44af89e, 0x123df32a, 0xd79acda4, 0x71edc610, 0x4005dc8d, 0xe672d739, - 0x103aa7d0, 0xb64dac64, 0x87a5b6f9, 0x21d2bd4d, 0xe47583c3, 0x42028877, 0x73ea92ea, 0xd59d995e, - 0x8bb64ce5, 0x2dc14751, 0x1c295dcc, 0xba5e5678, 0x7ff968f6, 0xd98e6342, 0xe86679df, 0x4e11726b, - 0xb8590282, 0x1e2e0936, 0x2fc613ab, 0x89b1181f, 0x4c162691, 0xea612d25, 0xdb8937b8, 0x7dfe3c0c, - 0xec68d02b, 0x4a1fdb9f, 0x7bf7c102, 0xdd80cab6, 0x1827f438, 0xbe50ff8c, 0x8fb8e511, 0x29cfeea5, - 0xdf879e4c, 0x79f095f8, 0x48188f65, 0xee6f84d1, 0x2bc8ba5f, 0x8dbfb1eb, 0xbc57ab76, 0x1a20a0c2, - 0x8816eaf2, 0x2e61e146, 0x1f89fbdb, 0xb9fef06f, 0x7c59cee1, 0xda2ec555, 0xebc6dfc8, 0x4db1d47c, - 0xbbf9a495, 0x1d8eaf21, 0x2c66b5bc, 0x8a11be08, 0x4fb68086, 0xe9c18b32, 0xd82991af, 0x7e5e9a1b, - 0xefc8763c, 0x49bf7d88, 0x78576715, 0xde206ca1, 0x1b87522f, 0xbdf0599b, 0x8c184306, 0x2a6f48b2, - 0xdc27385b, 0x7a5033ef, 0x4bb82972, 0xedcf22c6, 0x28681c48, 0x8e1f17fc, 0xbff70d61, 0x198006d5, - 0x47abd36e, 0xe1dcd8da, 0xd034c247, 0x7643c9f3, 0xb3e4f77d, 0x1593fcc9, 0x247be654, 0x820cede0, - 0x74449d09, 0xd23396bd, 0xe3db8c20, 0x45ac8794, 0x800bb91a, 0x267cb2ae, 0x1794a833, 0xb1e3a387, - 0x20754fa0, 0x86024414, 0xb7ea5e89, 0x119d553d, 0xd43a6bb3, 0x724d6007, 0x43a57a9a, 0xe5d2712e, - 0x139a01c7, 0xb5ed0a73, 0x840510ee, 0x22721b5a, 0xe7d525d4, 0x41a22e60, 0x704a34fd, 0xd63d3f49, - 0xcc1d9f8b, 0x6a6a943f, 0x5b828ea2, 0xfdf58516, 0x3852bb98, 0x9e25b02c, 0xafcdaab1, 0x09baa105, - 0xfff2d1ec, 0x5985da58, 0x686dc0c5, 0xce1acb71, 0x0bbdf5ff, 0xadcafe4b, 0x9c22e4d6, 0x3a55ef62, - 0xabc30345, 0x0db408f1, 0x3c5c126c, 0x9a2b19d8, 0x5f8c2756, 0xf9fb2ce2, 0xc813367f, 0x6e643dcb, - 0x982c4d22, 0x3e5b4696, 0x0fb35c0b, 0xa9c457bf, 0x6c636931, 0xca146285, 0xfbfc7818, 0x5d8b73ac, - 0x03a0a617, 0xa5d7ada3, 0x943fb73e, 0x3248bc8a, 0xf7ef8204, 0x519889b0, 0x6070932d, 0xc6079899, - 0x304fe870, 0x9638e3c4, 0xa7d0f959, 0x01a7f2ed, 0xc400cc63, 0x6277c7d7, 0x539fdd4a, 0xf5e8d6fe, - 0x647e3ad9, 0xc209316d, 0xf3e12bf0, 0x55962044, 0x90311eca, 0x3646157e, 0x07ae0fe3, 0xa1d90457, - 0x579174be, 0xf1e67f0a, 0xc00e6597, 0x66796e23, 0xa3de50ad, 0x05a95b19, 0x34414184, 0x92364a30, - 0x00000000, 0xccaa009e, 0x4225077d, 0x8e8f07e3, 0x844a0efa, 0x48e00e64, 0xc66f0987, 0x0ac50919, - 0xd3e51bb5, 0x1f4f1b2b, 0x91c01cc8, 0x5d6a1c56, 0x57af154f, 0x9b0515d1, 0x158a1232, 0xd92012ac, - 0x7cbb312b, 0xb01131b5, 0x3e9e3656, 0xf23436c8, 0xf8f13fd1, 0x345b3f4f, 0xbad438ac, 0x767e3832, - 0xaf5e2a9e, 0x63f42a00, 0xed7b2de3, 0x21d12d7d, 0x2b142464, 0xe7be24fa, 0x69312319, 0xa59b2387, - 0xf9766256, 0x35dc62c8, 0xbb53652b, 0x77f965b5, 0x7d3c6cac, 0xb1966c32, 0x3f196bd1, 0xf3b36b4f, - 0x2a9379e3, 0xe639797d, 0x68b67e9e, 0xa41c7e00, 0xaed97719, 0x62737787, 0xecfc7064, 0x205670fa, - 0x85cd537d, 0x496753e3, 0xc7e85400, 0x0b42549e, 0x01875d87, 0xcd2d5d19, 0x43a25afa, 0x8f085a64, - 0x562848c8, 0x9a824856, 0x140d4fb5, 0xd8a74f2b, 0xd2624632, 0x1ec846ac, 0x9047414f, 0x5ced41d1, - 0x299dc2ed, 0xe537c273, 0x6bb8c590, 0xa712c50e, 0xadd7cc17, 0x617dcc89, 0xeff2cb6a, 0x2358cbf4, - 0xfa78d958, 0x36d2d9c6, 0xb85dde25, 0x74f7debb, 0x7e32d7a2, 0xb298d73c, 0x3c17d0df, 0xf0bdd041, - 0x5526f3c6, 0x998cf358, 0x1703f4bb, 0xdba9f425, 0xd16cfd3c, 0x1dc6fda2, 0x9349fa41, 0x5fe3fadf, - 0x86c3e873, 0x4a69e8ed, 0xc4e6ef0e, 0x084cef90, 0x0289e689, 0xce23e617, 0x40ace1f4, 0x8c06e16a, - 0xd0eba0bb, 0x1c41a025, 0x92cea7c6, 0x5e64a758, 0x54a1ae41, 0x980baedf, 0x1684a93c, 0xda2ea9a2, - 0x030ebb0e, 0xcfa4bb90, 0x412bbc73, 0x8d81bced, 0x8744b5f4, 0x4beeb56a, 0xc561b289, 0x09cbb217, - 0xac509190, 0x60fa910e, 0xee7596ed, 0x22df9673, 0x281a9f6a, 0xe4b09ff4, 0x6a3f9817, 0xa6959889, - 0x7fb58a25, 0xb31f8abb, 0x3d908d58, 0xf13a8dc6, 0xfbff84df, 0x37558441, 0xb9da83a2, 0x7570833c, - 0x533b85da, 0x9f918544, 0x111e82a7, 0xddb48239, 0xd7718b20, 0x1bdb8bbe, 0x95548c5d, 0x59fe8cc3, - 0x80de9e6f, 0x4c749ef1, 0xc2fb9912, 0x0e51998c, 0x04949095, 0xc83e900b, 0x46b197e8, 0x8a1b9776, - 0x2f80b4f1, 0xe32ab46f, 0x6da5b38c, 0xa10fb312, 0xabcaba0b, 0x6760ba95, 0xe9efbd76, 0x2545bde8, - 0xfc65af44, 0x30cfafda, 0xbe40a839, 0x72eaa8a7, 0x782fa1be, 0xb485a120, 0x3a0aa6c3, 0xf6a0a65d, - 0xaa4de78c, 0x66e7e712, 0xe868e0f1, 0x24c2e06f, 0x2e07e976, 0xe2ade9e8, 0x6c22ee0b, 0xa088ee95, - 0x79a8fc39, 0xb502fca7, 0x3b8dfb44, 0xf727fbda, 0xfde2f2c3, 0x3148f25d, 0xbfc7f5be, 0x736df520, - 0xd6f6d6a7, 0x1a5cd639, 0x94d3d1da, 0x5879d144, 0x52bcd85d, 0x9e16d8c3, 0x1099df20, 0xdc33dfbe, - 0x0513cd12, 0xc9b9cd8c, 0x4736ca6f, 0x8b9ccaf1, 0x8159c3e8, 0x4df3c376, 0xc37cc495, 0x0fd6c40b, - 0x7aa64737, 0xb60c47a9, 0x3883404a, 0xf42940d4, 0xfeec49cd, 0x32464953, 0xbcc94eb0, 0x70634e2e, - 0xa9435c82, 0x65e95c1c, 0xeb665bff, 0x27cc5b61, 0x2d095278, 0xe1a352e6, 0x6f2c5505, 0xa386559b, - 0x061d761c, 0xcab77682, 0x44387161, 0x889271ff, 0x825778e6, 0x4efd7878, 0xc0727f9b, 0x0cd87f05, - 0xd5f86da9, 0x19526d37, 0x97dd6ad4, 0x5b776a4a, 0x51b26353, 0x9d1863cd, 0x1397642e, 0xdf3d64b0, - 0x83d02561, 0x4f7a25ff, 0xc1f5221c, 0x0d5f2282, 0x079a2b9b, 0xcb302b05, 0x45bf2ce6, 0x89152c78, - 0x50353ed4, 0x9c9f3e4a, 0x121039a9, 0xdeba3937, 0xd47f302e, 0x18d530b0, 0x965a3753, 0x5af037cd, - 0xff6b144a, 0x33c114d4, 0xbd4e1337, 0x71e413a9, 0x7b211ab0, 0xb78b1a2e, 0x39041dcd, 0xf5ae1d53, - 0x2c8e0fff, 0xe0240f61, 0x6eab0882, 0xa201081c, 0xa8c40105, 0x646e019b, 0xeae10678, 0x264b06e6 -]; diff --git a/vendor/zune-inflate/src/decoder.rs b/vendor/zune-inflate/src/decoder.rs deleted file mode 100644 index 105c882..0000000 --- a/vendor/zune-inflate/src/decoder.rs +++ /dev/null @@ -1,1791 +0,0 @@ -#![allow(unused_imports)] - -use alloc::vec::Vec; -use alloc::{format, vec}; - -use crate::bitstream::BitStreamReader; -use crate::constants::{ - DEFLATE_BLOCKTYPE_DYNAMIC_HUFFMAN, DEFLATE_BLOCKTYPE_RESERVED, DEFLATE_BLOCKTYPE_STATIC, - DEFLATE_BLOCKTYPE_UNCOMPRESSED, DEFLATE_MAX_CODEWORD_LENGTH, - DEFLATE_MAX_LITLEN_CODEWORD_LENGTH, DEFLATE_MAX_NUM_SYMS, DEFLATE_MAX_OFFSET_CODEWORD_LENGTH, - DEFLATE_MAX_PRE_CODEWORD_LEN, DEFLATE_NUM_LITLEN_SYMS, DEFLATE_NUM_OFFSET_SYMS, - DEFLATE_NUM_PRECODE_SYMS, DEFLATE_PRECODE_LENS_PERMUTATION, DELFATE_MAX_LENS_OVERRUN, - FASTCOPY_BYTES, FASTLOOP_MAX_BYTES_WRITTEN, HUFFDEC_END_OF_BLOCK, HUFFDEC_EXCEPTIONAL, - HUFFDEC_LITERAL, HUFFDEC_SUITABLE_POINTER, LITLEN_DECODE_BITS, LITLEN_DECODE_RESULTS, - LITLEN_ENOUGH, LITLEN_TABLE_BITS, OFFSET_DECODE_RESULTS, OFFSET_ENOUGH, OFFSET_TABLEBITS, - PRECODE_DECODE_RESULTS, PRECODE_ENOUGH, PRECODE_TABLE_BITS -}; -use crate::errors::{DecodeErrorStatus, InflateDecodeErrors}; -#[cfg(feature = "gzip")] -use crate::gzip_constants::{ - GZIP_CM_DEFLATE, GZIP_FCOMMENT, GZIP_FEXTRA, GZIP_FHCRC, GZIP_FNAME, GZIP_FOOTER_SIZE, - GZIP_FRESERVED, GZIP_ID1, GZIP_ID2 -}; -use crate::utils::{copy_rep_matches, fixed_copy_within, make_decode_table_entry}; - -struct DeflateHeaderTables -{ - litlen_decode_table: [u32; LITLEN_ENOUGH], - offset_decode_table: [u32; OFFSET_ENOUGH] -} - -impl Default for DeflateHeaderTables -{ - fn default() -> Self - { - DeflateHeaderTables { - litlen_decode_table: [0; LITLEN_ENOUGH], - offset_decode_table: [0; OFFSET_ENOUGH] - } - } -} - -/// Options that can influence decompression -/// in Deflate/Zlib/Gzip -/// -/// To use them, pass a customized options to -/// the deflate decoder. -#[derive(Copy, Clone)] -pub struct DeflateOptions -{ - limit: usize, - confirm_checksum: bool, - size_hint: usize -} - -impl Default for DeflateOptions -{ - fn default() -> Self - { - DeflateOptions { - limit: 1 << 30, - confirm_checksum: true, - size_hint: 37000 - } - } -} - -impl DeflateOptions -{ - /// Get deflate/zlib limit option - /// - /// The decoder won't extend the inbuilt limit and will - /// return an error if the limit is exceeded - /// - /// # Returns - /// The currently set limit of the instance - /// # Note - /// This is provided as a best effort, correctly quiting - /// is detrimental to speed and hence this should not be relied too much. - pub const fn get_limit(&self) -> usize - { - self.limit - } - /// Set a limit to the internal vector - /// used to store decoded zlib/deflate output. - /// - /// # Arguments - /// limit: The new decompressor limit - /// # Returns - /// A modified version of DeflateDecoder - /// - /// # Note - /// This is provided as a best effort, correctly quiting - /// is detrimental to speed and hence this should not be relied too much - #[must_use] - pub fn set_limit(mut self, limit: usize) -> Self - { - self.limit = limit; - self - } - - /// Get whether the decoder will confirm a checksum - /// after decoding - pub const fn get_confirm_checksum(&self) -> bool - { - self.confirm_checksum - } - /// Set whether the decoder should confirm a checksum - /// after decoding - /// - /// Note, you should definitely confirm your checksum, use - /// this with caution, otherwise data returned may be corrupt - /// - /// # Arguments - /// - yes: When true, the decoder will confirm checksum - /// when false, the decoder will skip checksum verification - /// # Notes - /// This does not have an influence for deflate decoding as - /// it does not have a checksum - pub fn set_confirm_checksum(mut self, yes: bool) -> Self - { - self.confirm_checksum = yes; - self - } - - /// Get the default set size hint for the decompressor - /// - /// The decompressor initializes the internal storage for decompressed bytes - /// with this size and will reallocate the vec if the decompressed size becomes bigger - /// than this, but when the user currently knows how big the output will be, can be used - /// to prevent unnecessary re-allocations - pub const fn get_size_hint(&self) -> usize - { - self.size_hint - } - /// Set the size hint for the decompressor - /// - /// This can be used to prevent multiple re-allocations - #[must_use] - pub const fn set_size_hint(mut self, hint: usize) -> Self - { - self.size_hint = hint; - self - } -} - -/// A deflate decoder instance. -/// -/// The decoder manages output buffer as opposed to requiring the caller to provide a pre-allocated buffer -/// it tracks number of bytes written and on successfully reaching the -/// end of the block, will return a vector with exactly -/// the number of decompressed bytes. -/// -/// This means that it may use up huge amounts of memory if not checked, but -/// there are [options] that can prevent that -/// -/// [options]: DeflateOptions -pub struct DeflateDecoder<'a> -{ - data: &'a [u8], - position: usize, - stream: BitStreamReader<'a>, - is_last_block: bool, - static_codes_loaded: bool, - deflate_header_tables: DeflateHeaderTables, - options: DeflateOptions -} - -impl<'a> DeflateDecoder<'a> -{ - /// Create a new decompressor that will read compressed - /// data from `data` and return a new vector containing new data - /// - /// # Arguments - /// - `data`: The compressed data. Data can be of any type - /// gzip,zlib or raw deflate. - /// - /// # Returns - /// A decoder instance which will pull compressed data from `data` to inflate the output output - /// - /// # Note - /// - /// The default output size limit is **1 GiB.** - /// this is to protect the end user against ddos attacks as deflate does not specify it's - /// output size upfront - /// - /// The checksum will be verified depending on the called function. - /// this only works for zlib and gzip since deflate does not have a checksum - /// - /// These defaults can be overridden via [new_with_options()](Self::new_with_options). - pub fn new(data: &'a [u8]) -> DeflateDecoder<'a> - { - let options = DeflateOptions::default(); - - Self::new_with_options(data, options) - } - /// Create new decoder with specified options - /// - /// This can be used to fine tune the decoder to the user's - /// needs. - /// - /// - /// # Arguments - /// - `data`: The compressed data. Data can be of any format i.e - /// gzip, zlib or raw deflate. - /// - `options` : A set of user defined options which tune how the decompressor - /// - /// # Returns - /// A decoder instance which will pull compressed data from `data` to inflate output - /// - /// # Example - /// ```no_run - /// use zune_inflate::{DeflateDecoder, DeflateOptions}; - /// let data = [37]; - /// let options = DeflateOptions::default() - /// .set_confirm_checksum(true) // confirm the checksum for zlib and gzip - /// .set_limit(1000); // how big I think the input will be - /// let mut decoder = DeflateDecoder::new_with_options(&data,options); - /// // do some stuff and then call decode - /// let data = decoder.decode_zlib(); - /// - /// ``` - pub fn new_with_options(data: &'a [u8], options: DeflateOptions) -> DeflateDecoder<'a> - { - // create stream - DeflateDecoder { - data, - position: 0, - stream: BitStreamReader::new(data), - is_last_block: false, - static_codes_loaded: false, - deflate_header_tables: DeflateHeaderTables::default(), - options - } - } - /// Decode zlib-encoded data returning the uncompressed in a `Vec` - /// or an error if something went wrong. - /// - /// Bytes consumed will be from the data passed when the - /// `new` method was called. - /// - /// # Arguments - /// - None - /// # Returns - /// Result type containing the decoded data. - /// - /// - `Ok(Vec)`: Decoded vector containing the uncompressed bytes - /// - `Err(InflateDecodeErrors)`: Error that occurred during decoding - /// - /// It's possible to recover bytes even after an error occurred, bytes up - /// to when error was encountered are stored in [InflateDecodeErrors] - /// - /// - /// # Note - /// This needs the `zlib` feature enabled to be available otherwise it's a - /// compile time error - /// - /// [InflateDecodeErrors]:crate::errors::InflateDecodeErrors - /// - #[cfg(feature = "zlib")] - pub fn decode_zlib(&mut self) -> Result, InflateDecodeErrors> - { - use crate::utils::calc_adler_hash; - - if self.data.len() - < 2 /* zlib header */ - + 4 - /* Deflate */ - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::InsufficientData - )); - } - - // Zlib flags - // See https://www.ietf.org/rfc/rfc1950.txt for - // the RFC - let cmf = self.data[0]; - let flg = self.data[1]; - - let cm = cmf & 0xF; - let cinfo = cmf >> 4; - - // let fcheck = flg & 0xF; - // let fdict = (flg >> 4) & 1; - // let flevel = flg >> 5; - - // confirm we have the right deflate methods - if cm != 8 - { - if cm == 15 - { - return Err(InflateDecodeErrors::new_with_error(DecodeErrorStatus::Generic( - "CM of 15 is preserved by the standard,currently don't know how to handle it" - ))); - } - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::GenericStr(format!("Unknown zlib compression method {cm}")) - )); - } - if cinfo > 7 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::GenericStr(format!( - "Unknown cinfo `{cinfo}` greater than 7, not allowed" - )) - )); - } - let flag_checks = (u16::from(cmf) * 256) + u16::from(flg); - - if flag_checks % 31 != 0 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::Generic("FCHECK integrity not preserved") - )); - } - - self.position = 2; - - let data = self.decode_deflate()?; - - if self.options.confirm_checksum - { - // Get number of consumed bytes from the input - let out_pos = self.stream.get_position() + self.position + self.stream.over_read; - - // read adler - if let Some(adler) = self.data.get(out_pos..out_pos + 4) - { - let adler_bits: [u8; 4] = adler.try_into().unwrap(); - - let adler32_expected = u32::from_be_bytes(adler_bits); - - let adler32_found = calc_adler_hash(&data); - - if adler32_expected != adler32_found - { - let err_msg = - DecodeErrorStatus::MismatchedAdler(adler32_expected, adler32_found); - let err = InflateDecodeErrors::new(err_msg, data); - - return Err(err); - } - } - else - { - let err = InflateDecodeErrors::new(DecodeErrorStatus::InsufficientData, data); - - return Err(err); - } - } - - Ok(data) - } - - /// Decode a gzip encoded data and return the uncompressed data in a - /// `Vec` or an error if something went wrong - /// - /// Bytes consumed will be from the data passed when the - /// `new` method was called. - /// - /// # Arguments - /// - None - /// # Returns - /// Result type containing the decoded data. - /// - /// - `Ok(Vec)`: Decoded vector containing the uncompressed bytes - /// - `Err(InflateDecodeErrors)`: Error that occurred during decoding - /// - /// It's possible to recover bytes even after an error occurred, bytes up - /// to when error was encountered are stored in [InflateDecodeErrors] - /// - /// # Note - /// This needs the `gzip` feature enabled to be available, otherwise it's a - /// compile time error - /// - /// [InflateDecodeErrors]:crate::errors::InflateDecodeErrors - /// - #[cfg(feature = "gzip")] - pub fn decode_gzip(&mut self) -> Result, InflateDecodeErrors> - { - if self.data.len() < 18 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::InsufficientData - )); - } - - if self.data[self.position] != GZIP_ID1 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::CorruptData - )); - } - self.position += 1; - if self.data[self.position] != GZIP_ID2 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::CorruptData - )); - } - self.position += 1; - - if self.data[self.position] != GZIP_CM_DEFLATE - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::CorruptData - )); - } - self.position += 1; - - let flg = self.data[self.position]; - self.position += 1; - - // skip mtime - self.position += 4; - // skip xfl - self.position += 1; - // skip os - self.position += 1; - - if (flg & GZIP_FRESERVED) != 0 - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::CorruptData - )); - } - // extra field - if (flg & GZIP_FEXTRA) != 0 - { - let len_bytes = self.data[self.position..self.position + 2] - .try_into() - .unwrap(); - let xlen = usize::from(u16::from_le_bytes(len_bytes)); - - self.position += 2; - - if self.data.len().saturating_sub(self.position) < xlen + GZIP_FOOTER_SIZE - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::CorruptData - )); - } - self.position += xlen; - } - // original file name zero terminated - if (flg & GZIP_FNAME) != 0 - { - loop - { - if let Some(byte) = self.data.get(self.position) - { - self.position += 1; - - if *byte == 0 - { - break; - } - } - else - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::InsufficientData - )); - } - } - } - // File comment zero terminated - if (flg & GZIP_FCOMMENT) != 0 - { - loop - { - if let Some(byte) = self.data.get(self.position) - { - self.position += 1; - - if *byte == 0 - { - break; - } - } - else - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::InsufficientData - )); - } - } - } - // crc16 for gzip header - if (flg & GZIP_FHCRC) != 0 - { - self.position += 2; - } - - if self.position + GZIP_FOOTER_SIZE > self.data.len() - { - return Err(InflateDecodeErrors::new_with_error( - DecodeErrorStatus::InsufficientData - )); - } - - let data = self.decode_deflate()?; - - let mut out_pos = self.stream.get_position() + self.position + self.stream.over_read; - - if self.options.confirm_checksum - { - // Get number of consumed bytes from the input - - if let Some(crc) = self.data.get(out_pos..out_pos + 4) - { - let crc_bits: [u8; 4] = crc.try_into().unwrap(); - - let crc32_expected = u32::from_le_bytes(crc_bits); - - let crc32_found = !crate::crc::crc32(&data, !0); - - if crc32_expected != crc32_found - { - let err_msg = DecodeErrorStatus::MismatchedCRC(crc32_expected, crc32_found); - let err = InflateDecodeErrors::new(err_msg, data); - - return Err(err); - } - } - else - { - let err = InflateDecodeErrors::new(DecodeErrorStatus::InsufficientData, data); - - return Err(err); - } - } - //checksum - out_pos += 4; - - if let Some(val) = self.data.get(out_pos..out_pos + 4) - { - let actual_bytes: [u8; 4] = val.try_into().unwrap(); - let ac = u32::from_le_bytes(actual_bytes) as usize; - - if data.len() != ac - { - let err = DecodeErrorStatus::Generic("ISIZE does not match actual bytes"); - - let err = InflateDecodeErrors::new(err, data); - - return Err(err); - } - } - else - { - let err = InflateDecodeErrors::new(DecodeErrorStatus::InsufficientData, data); - - return Err(err); - } - - Ok(data) - } - /// Decode a deflate stream returning the data as `Vec` or an error - /// indicating what went wrong. - /// # Arguments - /// - None - /// # Returns - /// Result type containing the decoded data. - /// - /// - `Ok(Vec)`: Decoded vector containing the uncompressed bytes - /// - `Err(InflateDecodeErrors)`: Error that occurred during decoding - /// - /// It's possible to recover bytes even after an error occurred, bytes up - /// to when error was encountered are stored in [InflateDecodeErrors] - /// - /// - /// # Example - /// ```no_run - /// let data = [42]; // answer to life, the universe and everything - /// - /// let mut decoder = zune_inflate::DeflateDecoder::new(&data); - /// let bytes = decoder.decode_deflate().unwrap(); - /// ``` - /// - /// [InflateDecodeErrors]:crate::errors::InflateDecodeErrors - pub fn decode_deflate(&mut self) -> Result, InflateDecodeErrors> - { - self.start_deflate_block() - } - /// Main inner loop for decompressing deflate data - #[allow(unused_assignments)] - fn start_deflate_block(&mut self) -> Result, InflateDecodeErrors> - { - // start deflate decode - // re-read the stream so that we can remove code read by zlib - self.stream = BitStreamReader::new(&self.data[self.position..]); - - self.stream.refill(); - - // Output space for our decoded bytes. - let mut out_block = vec![0; self.options.size_hint]; - // bits used - - let mut src_offset = 0; - let mut dest_offset = 0; - - loop - { - self.stream.refill(); - - self.is_last_block = self.stream.get_bits(1) == 1; - let block_type = self.stream.get_bits(2); - - if block_type == DEFLATE_BLOCKTYPE_UNCOMPRESSED - { - /* - * Uncompressed block: copy 'len' bytes literally from the input - * buffer to the output buffer. - */ - /* - * The RFC says that - * skip any remaining bits in current partially - * processed byte - * read LEN and NLEN (see next section) - * copy LEN bytes of data to output - */ - - if self.stream.over_read > usize::from(self.stream.get_bits_left() >> 3) - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::Generic("over-read stream"); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - let partial_bits = self.stream.get_bits_left() & 7; - - self.stream.drop_bits(partial_bits); - - let len = self.stream.get_bits(16) as u16; - let nlen = self.stream.get_bits(16) as u16; - - // copy to deflate - if len != !nlen - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::Generic("Len and nlen do not match"); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - let len = len as usize; - - let start = self.stream.get_position() + self.position + self.stream.over_read; - - // ensure there is enough space for a fast copy - if dest_offset + len + FASTCOPY_BYTES > out_block.len() - { - // and if there is not, resize - let new_len = out_block.len() + RESIZE_BY + len; - - out_block.resize(new_len, 0); - } - - if self.data.get((start + len).saturating_sub(1)).is_none() - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::CorruptData; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - if dest_offset > self.options.limit - { - out_block.truncate(dest_offset); - - let err_msg = - DecodeErrorStatus::OutputLimitExceeded(self.options.limit, out_block.len()); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - out_block[dest_offset..dest_offset + len] - .copy_from_slice(&self.data[start..start + len]); - - dest_offset += len; - - // get the new position to write. - self.stream.position = - len + (self.stream.position - usize::from(self.stream.bits_left >> 3)); - - self.stream.reset(); - - if self.is_last_block - { - break; - } - - continue; - } - else if block_type == DEFLATE_BLOCKTYPE_RESERVED - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::Generic("Reserved block type 0b11 encountered"); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - // build decode tables for static and dynamic tables - match self.build_decode_table(block_type) - { - Ok(_) => (), - Err(value) => - { - out_block.truncate(dest_offset); - - let err_msg = value; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - }; - - // Tables are mutated into the struct, so at this point we know the tables - // are loaded, take a reference to them - let litlen_decode_table = &self.deflate_header_tables.litlen_decode_table; - let offset_decode_table = &self.deflate_header_tables.offset_decode_table; - - /* - * This is the "fast loop" for decoding literals and matches. It does - * bounds checks on in_next and out_next in the loop conditions so that - * additional bounds checks aren't needed inside the loop body. - * - * To reduce latency, the bit-buffer is refilled and the next litlen - * decode table entry is preloaded before each loop iteration. - */ - let (mut literal, mut length, mut offset, mut entry) = (0, 0, 0, 0); - - let mut saved_bitbuf; - - 'decode: loop - { - let close_src = 3 * FASTCOPY_BYTES < self.stream.remaining_bytes(); - - if close_src - { - self.stream.refill_inner_loop(); - - let lit_mask = self.stream.peek_bits::(); - - entry = litlen_decode_table[lit_mask]; - - 'sequence: loop - { - // Resize the output vector here to ensure we can always have - // enough space for sloppy copies - if dest_offset + FASTLOOP_MAX_BYTES_WRITTEN > out_block.len() - { - let curr_len = out_block.len(); - out_block.resize(curr_len + FASTLOOP_MAX_BYTES_WRITTEN + RESIZE_BY, 0) - } - // At this point entry contains the next value of the litlen - // This will always be the case so meaning all our exit paths need - // to load in the next entry. - - // recheck after every sequence - // when we hit continue, we need to recheck this - // as we are trying to emulate a do while - let new_check = self.stream.src.len() < self.stream.position + 8; - - if new_check - { - break 'sequence; - } - - self.stream.refill_inner_loop(); - /* - * Consume the bits for the litlen decode table entry. Save the - * original bit-buf for later, in case the extra match length - * bits need to be extracted from it. - */ - saved_bitbuf = self.stream.buffer; - - self.stream.drop_bits((entry & 0xFF) as u8); - - /* - * Begin by checking for a "fast" literal, i.e. a literal that - * doesn't need a subtable. - */ - if (entry & HUFFDEC_LITERAL) != 0 - { - /* - * On 64-bit platforms, we decode up to 2 extra fast - * literals in addition to the primary item, as this - * increases performance and still leaves enough bits - * remaining for what follows. We could actually do 3, - * assuming LITLEN_TABLEBITS=11, but that actually - * decreases performance slightly (perhaps by messing - * with the branch prediction of the conditional refill - * that happens later while decoding the match offset). - */ - - literal = entry >> 16; - - let new_pos = self.stream.peek_bits::(); - - entry = litlen_decode_table[new_pos]; - saved_bitbuf = self.stream.buffer; - - self.stream.drop_bits(entry as u8); - - let out: &mut [u8; 2] = out_block - .get_mut(dest_offset..dest_offset + 2) - .unwrap() - .try_into() - .unwrap(); - - out[0] = literal as u8; - dest_offset += 1; - - if (entry & HUFFDEC_LITERAL) != 0 - { - /* - * Another fast literal, but this one is in lieu of the - * primary item, so it doesn't count as one of the extras. - */ - - // load in the next entry. - literal = entry >> 16; - - let new_pos = self.stream.peek_bits::(); - - entry = litlen_decode_table[new_pos]; - - out[1] = literal as u8; - dest_offset += 1; - - continue; - } - } - /* - * It's not a literal entry, so it can be a length entry, a - * subtable pointer entry, or an end-of-block entry. Detect the - * two unlikely cases by testing the HUFFDEC_EXCEPTIONAL flag. - */ - if (entry & HUFFDEC_EXCEPTIONAL) != 0 - { - // Subtable pointer or end of block entry - if (entry & HUFFDEC_END_OF_BLOCK) != 0 - { - // block done - break 'decode; - } - /* - * A subtable is required. Load and consume the - * subtable entry. The subtable entry can be of any - * type: literal, length, or end-of-block. - */ - let entry_position = ((entry >> 8) & 0x3F) as usize; - let mut pos = (entry >> 16) as usize; - - saved_bitbuf = self.stream.buffer; - - pos += self.stream.peek_var_bits(entry_position); - entry = litlen_decode_table[pos.min(LITLEN_ENOUGH - 1)]; - - self.stream.drop_bits(entry as u8); - - if (entry & HUFFDEC_LITERAL) != 0 - { - // decode a literal that required a sub table - let new_pos = self.stream.peek_bits::(); - - literal = entry >> 16; - entry = litlen_decode_table[new_pos]; - - *out_block.get_mut(dest_offset).unwrap_or(&mut 0) = - (literal & 0xFF) as u8; - - dest_offset += 1; - - continue; - } - - if (entry & HUFFDEC_END_OF_BLOCK) != 0 - { - break 'decode; - } - } - - // At this point,we dropped at most 22 bits(LITLEN_DECODE is 11 and we - // can do it twice), we now just have 34 bits min remaining. - - /* - * Decode the match length: the length base value associated - * with the litlen symbol (which we extract from the decode - * table entry), plus the extra length bits. We don't need to - * consume the extra length bits here, as they were included in - * the bits consumed by the entry earlier. We also don't need - * to check for too-long matches here, as this is inside the - * fast loop where it's already been verified that the output - * buffer has enough space remaining to copy a max-length match. - */ - let entry_dup = entry; - - entry = offset_decode_table[self.stream.peek_bits::()]; - length = (entry_dup >> 16) as usize; - - let mask = (1 << entry_dup as u8) - 1; - - length += (saved_bitbuf & mask) as usize >> ((entry_dup >> 8) as u8); - - // offset requires a subtable - if (entry & HUFFDEC_EXCEPTIONAL) != 0 - { - self.stream.drop_bits(OFFSET_TABLEBITS as u8); - let extra = self.stream.peek_var_bits(((entry >> 8) & 0x3F) as usize); - entry = offset_decode_table[((entry >> 16) as usize + extra) & 511]; - // refill to handle some weird edge case where we have - // less bits than needed for reading the lit-len - } - saved_bitbuf = self.stream.buffer; - - self.stream.drop_bits((entry & 0xFF) as u8); - - let mask = (1 << entry as u8) - 1; - - offset = (entry >> 16) as usize; - offset += (saved_bitbuf & mask) as usize >> (((entry >> 8) & 0xFF) as u8); - - if offset > dest_offset - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::CorruptData; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - src_offset = dest_offset - offset; - - if self.stream.bits_left < 11 - { - self.stream.refill_inner_loop(); - } - // Copy some bytes unconditionally - // This makes us copy smaller match lengths quicker because we don't need - // a loop + don't send too much pressure to the Memory unit. - fixed_copy_within::( - &mut out_block, - src_offset, - dest_offset - ); - - entry = litlen_decode_table[self.stream.peek_bits::()]; - - let mut current_position = dest_offset; - - dest_offset += length; - - if offset == 1 - { - // RLE fill with a single byte - let byte_to_repeat = out_block[src_offset]; - out_block[current_position..dest_offset].fill(byte_to_repeat); - } - else if offset <= FASTCOPY_BYTES - && current_position + offset < dest_offset - { - // The second conditional ensures we only come - // here if the first copy didn't succeed to copy just enough bytes for a rep - // match to be valid, i.e we want this path to be taken the least amount - // of times possible - - // the unconditional copy above copied some bytes - // don't let it go into waste - // Increment the position we are in by the number of correct bytes - // currently copied - let mut src_position = src_offset + offset; - let mut dest_position = current_position + offset; - - // loop copying offset bytes in place - // notice this loop does fixed copies but increments in offset bytes :) - // that is intentional. - loop - { - fixed_copy_within::( - &mut out_block, - src_position, - dest_position - ); - - src_position += offset; - dest_position += offset; - - if dest_position > dest_offset - { - break; - } - } - } - else if length > FASTCOPY_BYTES - { - current_position += FASTCOPY_BYTES; - // fast non-overlapping copy - // - // We have enough space to write the ML+FAST_COPY bytes ahead - // so we know this won't come to shoot us in the foot. - // - // An optimization is to copy FAST_COPY_BITS per invocation - // Currently FASTCOPY_BYTES is 16, this fits in nicely as we - // it's a single SIMD instruction on a lot of things, i.e x86,Arm and even - // wasm. - - // current position of the match - let mut dest_src_offset = src_offset + FASTCOPY_BYTES; - - // Number of bytes we are to copy - // copy in batches of FAST_BYTES - 'match_lengths: loop - { - // Safety: We resized out_block hence we know it can handle - // sloppy copies without it being out of bounds - // - // Reason: This is a latency critical loop, even branches start - // to matter - fixed_copy_within::( - &mut out_block, - dest_src_offset, - current_position - ); - - dest_src_offset += FASTCOPY_BYTES; - current_position += FASTCOPY_BYTES; - - if current_position > dest_offset - { - break 'match_lengths; - } - } - } - - if dest_offset > self.options.limit - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::OutputLimitExceeded( - self.options.limit, - dest_offset - ); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - if self.stream.src.len() < self.stream.position + 8 - { - // close to input end, move to the slower one - break 'sequence; - } - } - } - // generic loop that does things a bit slower but it's okay since it doesn't - // deal with a lot of things - // We can afford to be more careful here, checking that we do - // not drop non-existent bits etc etc as we do not have the - // assurances of the fast loop bits above. - loop - { - self.stream.refill(); - - if self.stream.over_read > usize::from(self.stream.bits_left >> 3) - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::CorruptData; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - let literal_mask = self.stream.peek_bits::(); - - entry = litlen_decode_table[literal_mask]; - - saved_bitbuf = self.stream.buffer; - - self.stream.drop_bits((entry & 0xFF) as u8); - - if (entry & HUFFDEC_SUITABLE_POINTER) != 0 - { - let extra = self.stream.peek_var_bits(((entry >> 8) & 0x3F) as usize); - - entry = litlen_decode_table[(entry >> 16) as usize + extra]; - saved_bitbuf = self.stream.buffer; - - self.stream.drop_bits((entry & 0xFF) as u8); - } - - length = (entry >> 16) as usize; - - if (entry & HUFFDEC_LITERAL) != 0 - { - resize_and_push(&mut out_block, dest_offset, length as u8); - - dest_offset += 1; - - continue; - } - - if (entry & HUFFDEC_END_OF_BLOCK) != 0 - { - break 'decode; - } - - let mask = (1 << entry as u8) - 1; - - length += (saved_bitbuf & mask) as usize >> ((entry >> 8) as u8); - - self.stream.refill(); - - entry = offset_decode_table[self.stream.peek_bits::()]; - - if (entry & HUFFDEC_EXCEPTIONAL) != 0 - { - // offset requires a subtable - self.stream.drop_bits(OFFSET_TABLEBITS as u8); - - let extra = self.stream.peek_var_bits(((entry >> 8) & 0x3F) as usize); - - entry = offset_decode_table[((entry >> 16) as usize + extra) & 511]; - } - - // ensure there is enough space for a fast copy - if dest_offset + length + FASTCOPY_BYTES > out_block.len() - { - let new_len = out_block.len() + RESIZE_BY + length; - out_block.resize(new_len, 0); - } - saved_bitbuf = self.stream.buffer; - - let mask = (1 << (entry & 0xFF) as u8) - 1; - - offset = (entry >> 16) as usize; - offset += (saved_bitbuf & mask) as usize >> ((entry >> 8) as u8); - - if offset > dest_offset - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::CorruptData; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - src_offset = dest_offset - offset; - - self.stream.drop_bits(entry as u8); - - let (dest_src, dest_ptr) = out_block.split_at_mut(dest_offset); - - if src_offset + length + FASTCOPY_BYTES > dest_offset - { - // overlapping copy - // do a simple rep match - copy_rep_matches(&mut out_block, src_offset, dest_offset, length); - } - else - { - dest_ptr[0..length] - .copy_from_slice(&dest_src[src_offset..src_offset + length]); - } - - dest_offset += length; - - if dest_offset > self.options.limit - { - out_block.truncate(dest_offset); - - let err_msg = - DecodeErrorStatus::OutputLimitExceeded(self.options.limit, dest_offset); - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - } - } - /* - * If any of the implicit appended zero bytes were consumed (not just - * refilled) before hitting end of stream, then the data is bad. - */ - if self.stream.over_read > usize::from(self.stream.bits_left >> 3) - { - out_block.truncate(dest_offset); - - let err_msg = DecodeErrorStatus::CorruptData; - let error = InflateDecodeErrors::new(err_msg, out_block); - - return Err(error); - } - - if self.is_last_block - { - break; - } - } - - // decompression. DONE - // Truncate data to match the number of actual - // bytes written. - out_block.truncate(dest_offset); - - Ok(out_block) - } - - /// Build decode tables for static and dynamic - /// huffman blocks. - fn build_decode_table(&mut self, block_type: u64) -> Result<(), DecodeErrorStatus> - { - const COUNT: usize = - DEFLATE_NUM_LITLEN_SYMS + DEFLATE_NUM_OFFSET_SYMS + DELFATE_MAX_LENS_OVERRUN; - - let mut lens = [0_u8; COUNT]; - let mut precode_lens = [0; DEFLATE_NUM_PRECODE_SYMS]; - let mut precode_decode_table = [0_u32; PRECODE_ENOUGH]; - let mut litlen_decode_table = [0_u32; LITLEN_ENOUGH]; - let mut offset_decode_table = [0; OFFSET_ENOUGH]; - - let mut num_litlen_syms = 0; - let mut num_offset_syms = 0; - - if block_type == DEFLATE_BLOCKTYPE_DYNAMIC_HUFFMAN - { - const SINGLE_PRECODE: usize = 3; - - self.static_codes_loaded = false; - - // Dynamic Huffman block - // Read codeword lengths - if !self.stream.has(5 + 5 + 4) - { - return Err(DecodeErrorStatus::InsufficientData); - } - - num_litlen_syms = 257 + (self.stream.get_bits(5)) as usize; - num_offset_syms = 1 + (self.stream.get_bits(5)) as usize; - - let num_explicit_precode_lens = 4 + (self.stream.get_bits(4)) as usize; - - self.stream.refill(); - - if !self.stream.has(3) - { - return Err(DecodeErrorStatus::InsufficientData); - } - - let first_precode = self.stream.get_bits(3) as u8; - let expected = (SINGLE_PRECODE * num_explicit_precode_lens.saturating_sub(1)) as u8; - - precode_lens[usize::from(DEFLATE_PRECODE_LENS_PERMUTATION[0])] = first_precode; - - self.stream.refill(); - - if !self.stream.has(expected) - { - return Err(DecodeErrorStatus::InsufficientData); - } - - for i in DEFLATE_PRECODE_LENS_PERMUTATION[1..] - .iter() - .take(num_explicit_precode_lens - 1) - { - let bits = self.stream.get_bits(3) as u8; - - precode_lens[usize::from(*i)] = bits; - } - - self.build_decode_table_inner( - &precode_lens, - &PRECODE_DECODE_RESULTS, - &mut precode_decode_table, - PRECODE_TABLE_BITS, - DEFLATE_NUM_PRECODE_SYMS, - DEFLATE_MAX_CODEWORD_LENGTH - )?; - - /* Decode the litlen and offset codeword lengths. */ - - let mut i = 0; - - loop - { - if i >= num_litlen_syms + num_offset_syms - { - // confirm here since with a continue loop stuff - // breaks - break; - } - - let rep_val: u8; - let rep_count: u64; - - if !self.stream.has(DEFLATE_MAX_PRE_CODEWORD_LEN + 7) - { - self.stream.refill(); - } - // decode next pre-code symbol - let entry_pos = self - .stream - .peek_bits::<{ DEFLATE_MAX_PRE_CODEWORD_LEN as usize }>(); - - let entry = precode_decode_table[entry_pos]; - let presym = entry >> 16; - - if !self.stream.has(entry as u8) - { - return Err(DecodeErrorStatus::InsufficientData); - } - - self.stream.drop_bits(entry as u8); - - if presym < 16 - { - // explicit codeword length - lens[i] = presym as u8; - i += 1; - continue; - } - - /* Run-length encoded codeword lengths */ - - /* - * Note: we don't need verify that the repeat count - * doesn't overflow the number of elements, since we've - * sized the lens array to have enough extra space to - * allow for the worst-case overrun (138 zeroes when - * only 1 length was remaining). - * - * In the case of the small repeat counts (presyms 16 - * and 17), it is fastest to always write the maximum - * number of entries. That gets rid of branches that - * would otherwise be required. - * - * It is not just because of the numerical order that - * our checks go in the order 'presym < 16', 'presym == - * 16', and 'presym == 17'. For typical data this is - * ordered from most frequent to least frequent case. - */ - if presym == 16 - { - if i == 0 - { - return Err(DecodeErrorStatus::CorruptData); - } - - if !self.stream.has(2) - { - return Err(DecodeErrorStatus::InsufficientData); - } - - // repeat previous length three to 6 times - rep_val = lens[i - 1]; - rep_count = 3 + self.stream.get_bits(2); - lens[i..i + 6].fill(rep_val); - i += rep_count as usize; - } - else if presym == 17 - { - if !self.stream.has(3) - { - return Err(DecodeErrorStatus::InsufficientData); - } - /* Repeat zero 3 - 10 times. */ - rep_count = 3 + self.stream.get_bits(3); - lens[i..i + 10].fill(0); - i += rep_count as usize; - } - else - { - if !self.stream.has(7) - { - return Err(DecodeErrorStatus::InsufficientData); - } - // repeat zero 11-138 times. - rep_count = 11 + self.stream.get_bits(7); - lens[i..i + rep_count as usize].fill(0); - i += rep_count as usize; - } - - if i >= num_litlen_syms + num_offset_syms - { - break; - } - } - } - else if block_type == DEFLATE_BLOCKTYPE_STATIC - { - if self.static_codes_loaded - { - return Ok(()); - } - - self.static_codes_loaded = true; - - lens[000..144].fill(8); - lens[144..256].fill(9); - lens[256..280].fill(7); - lens[280..288].fill(8); - lens[288..].fill(5); - - num_litlen_syms = 288; - num_offset_syms = 32; - } - // build offset decode table - self.build_decode_table_inner( - &lens[num_litlen_syms..], - &OFFSET_DECODE_RESULTS, - &mut offset_decode_table, - OFFSET_TABLEBITS, - num_offset_syms, - DEFLATE_MAX_OFFSET_CODEWORD_LENGTH - )?; - - self.build_decode_table_inner( - &lens, - &LITLEN_DECODE_RESULTS, - &mut litlen_decode_table, - LITLEN_TABLE_BITS, - num_litlen_syms, - DEFLATE_MAX_LITLEN_CODEWORD_LENGTH - )?; - - self.deflate_header_tables.offset_decode_table = offset_decode_table; - self.deflate_header_tables.litlen_decode_table = litlen_decode_table; - - Ok(()) - } - /// Build the decode table for the precode - #[allow(clippy::needless_range_loop)] - fn build_decode_table_inner( - &mut self, lens: &[u8], decode_results: &[u32], decode_table: &mut [u32], - table_bits: usize, num_syms: usize, mut max_codeword_len: usize - ) -> Result<(), DecodeErrorStatus> - { - const BITS: u32 = usize::BITS - 1; - - let mut len_counts: [u32; DEFLATE_MAX_CODEWORD_LENGTH + 1] = - [0; DEFLATE_MAX_CODEWORD_LENGTH + 1]; - let mut offsets: [u32; DEFLATE_MAX_CODEWORD_LENGTH + 1] = - [0; DEFLATE_MAX_CODEWORD_LENGTH + 1]; - let mut sorted_syms: [u16; DEFLATE_MAX_NUM_SYMS] = [0; DEFLATE_MAX_NUM_SYMS]; - - let mut i; - - // count how many codewords have each length, including 0. - for sym in 0..num_syms - { - len_counts[usize::from(lens[sym])] += 1; - } - - /* - * Determine the actual maximum codeword length that was used, and - * decrease table_bits to it if allowed. - */ - while max_codeword_len > 1 && len_counts[max_codeword_len] == 0 - { - max_codeword_len -= 1; - } - /* - * Sort the symbols primarily by increasing codeword length and - * A temporary array of length @num_syms. - * secondarily by increasing symbol value; or equivalently by their - * codewords in lexicographic order, since a canonical code is assumed. - * - * For efficiency, also compute 'codespace_used' in the same pass over - * 'len_counts[]' used to build 'offsets[]' for sorting. - */ - offsets[0] = 0; - offsets[1] = len_counts[0]; - - let mut codespace_used = 0_u32; - - for len in 1..max_codeword_len - { - offsets[len + 1] = offsets[len] + len_counts[len]; - codespace_used = (codespace_used << 1) + len_counts[len]; - } - codespace_used = (codespace_used << 1) + len_counts[max_codeword_len]; - - for sym in 0..num_syms - { - let pos = usize::from(lens[sym]); - sorted_syms[offsets[pos] as usize] = sym as u16; - offsets[pos] += 1; - } - i = (offsets[0]) as usize; - - /* - * Check whether the lengths form a complete code (exactly fills the - * codespace), an incomplete code (doesn't fill the codespace), or an - * overfull code (overflows the codespace). A codeword of length 'n' - * uses proportion '1/(2^n)' of the codespace. An overfull code is - * nonsensical, so is considered invalid. An incomplete code is - * considered valid only in two specific cases; see below. - */ - - // Overfull code - if codespace_used > 1 << max_codeword_len - { - return Err(DecodeErrorStatus::Generic("Overflown code")); - } - // incomplete code - if codespace_used < 1 << max_codeword_len - { - let entry = if codespace_used == 0 - { - /* - * An empty code is allowed. This can happen for the - * offset code in DEFLATE, since a dynamic Huffman block - * need not contain any matches. - */ - - /* sym=0, len=1 (arbitrary) */ - make_decode_table_entry(decode_results, 0, 1) - } - else - { - /* - * Allow codes with a single used symbol, with codeword - * length 1. The DEFLATE RFC is unclear regarding this - * case. What zlib's decompressor does is permit this - * for the litlen and offset codes and assume the - * codeword is '0' rather than '1'. We do the same - * except we allow this for precodes too, since there's - * no convincing reason to treat the codes differently. - * We also assign both codewords '0' and '1' to the - * symbol to avoid having to handle '1' specially. - */ - if codespace_used != 1 << (max_codeword_len - 1) || len_counts[1] != 1 - { - return Err(DecodeErrorStatus::Generic( - "Cannot work with empty pre-code table" - )); - } - make_decode_table_entry(decode_results, usize::from(sorted_syms[i]), 1) - }; - /* - * Note: the decode table still must be fully initialized, in - * case the stream is malformed and contains bits from the part - * of the codespace the incomplete code doesn't use. - */ - decode_table.fill(entry); - return Ok(()); - } - - /* - * The lengths form a complete code. Now, enumerate the codewords in - * lexicographic order and fill the decode table entries for each one. - * - * First, process all codewords with len <= table_bits. Each one gets - * '2^(table_bits-len)' direct entries in the table. - * - * Since DEFLATE uses bit-reversed codewords, these entries aren't - * consecutive but rather are spaced '2^len' entries apart. This makes - * filling them naively somewhat awkward and inefficient, since strided - * stores are less cache-friendly and preclude the use of word or - * vector-at-a-time stores to fill multiple entries per instruction. - * - * To optimize this, we incrementally double the table size. When - * processing codewords with length 'len', the table is treated as - * having only '2^len' entries, so each codeword uses just one entry. - * Then, each time 'len' is incremented, the table size is doubled and - * the first half is copied to the second half. This significantly - * improves performance over naively doing strided stores. - * - * Note that some entries copied for each table doubling may not have - * been initialized yet, but it doesn't matter since they're guaranteed - * to be initialized later (because the Huffman code is complete). - */ - let mut codeword = 0; - let mut len = 1; - let mut count = len_counts[1]; - - while count == 0 - { - len += 1; - - if len >= len_counts.len() - { - break; - } - count = len_counts[len]; - } - - let mut curr_table_end = 1 << len; - - while len <= table_bits - { - // Process all count codewords with length len - loop - { - let entry = make_decode_table_entry( - decode_results, - usize::from(sorted_syms[i]), - len as u32 - ); - i += 1; - // fill first entry for current codeword - decode_table[codeword] = entry; - - if codeword == curr_table_end - 1 - { - // last codeword (all 1's) - for _ in len..table_bits - { - decode_table.copy_within(0..curr_table_end, curr_table_end); - - curr_table_end <<= 1; - } - return Ok(()); - } - /* - * To advance to the lexicographically next codeword in - * the canonical code, the codeword must be incremented, - * then 0's must be appended to the codeword as needed - * to match the next codeword's length. - * - * Since the codeword is bit-reversed, appending 0's is - * a no-op. However, incrementing it is nontrivial. To - * do so efficiently, use the 'bsr' instruction to find - * the last (highest order) 0 bit in the codeword, set - * it, and clear any later (higher order) 1 bits. But - * 'bsr' actually finds the highest order 1 bit, so to - * use it first flip all bits in the codeword by XOR' ing - * it with (1U << len) - 1 == cur_table_end - 1. - */ - - let adv = BITS - (codeword ^ (curr_table_end - 1)).leading_zeros(); - let bit = 1 << adv; - - codeword &= bit - 1; - codeword |= bit; - count -= 1; - - if count == 0 - { - break; - } - } - // advance to the next codeword length - loop - { - len += 1; - - if len <= table_bits - { - // dest is decode_table[curr_table_end] - // source is decode_table(start of table); - // size is curr_table; - - decode_table.copy_within(0..curr_table_end, curr_table_end); - - //decode_table.copy_within(range, curr_table_end); - curr_table_end <<= 1; - } - count = len_counts[len]; - - if count != 0 - { - break; - } - } - } - // process codewords with len > table_bits. - // Require sub-tables - curr_table_end = 1 << table_bits; - - let mut subtable_prefix = usize::MAX; - let mut subtable_start = 0; - let mut subtable_bits; - - loop - { - /* - * Start a new sub-table if the first 'table_bits' bits of the - * codeword don't match the prefix of the current subtable. - */ - if codeword & ((1_usize << table_bits) - 1) != subtable_prefix - { - subtable_prefix = codeword & ((1 << table_bits) - 1); - subtable_start = curr_table_end; - - /* - * Calculate the subtable length. If the codeword has - * length 'table_bits + n', then the subtable needs - * '2^n' entries. But it may need more; if fewer than - * '2^n' codewords of length 'table_bits + n' remain, - * then the length will need to be incremented to bring - * in longer codewords until the subtable can be - * completely filled. Note that because the Huffman - * code is complete, it will always be possible to fill - * the sub-table eventually. - */ - subtable_bits = len - table_bits; - codespace_used = count; - - while codespace_used < (1 << subtable_bits) - { - subtable_bits += 1; - - if subtable_bits + table_bits > 15 - { - return Err(DecodeErrorStatus::CorruptData); - } - - codespace_used = (codespace_used << 1) + len_counts[table_bits + subtable_bits]; - } - - /* - * Create the entry that points from the main table to - * the subtable. - */ - decode_table[subtable_prefix] = (subtable_start as u32) << 16 - | HUFFDEC_EXCEPTIONAL - | HUFFDEC_SUITABLE_POINTER - | (subtable_bits as u32) << 8 - | table_bits as u32; - - curr_table_end = subtable_start + (1 << subtable_bits); - } - - /* Fill the sub-table entries for the current codeword. */ - - let stride = 1 << (len - table_bits); - - let mut j = subtable_start + (codeword >> table_bits); - - let entry = make_decode_table_entry( - decode_results, - sorted_syms[i] as usize, - (len - table_bits) as u32 - ); - i += 1; - - while j < curr_table_end - { - decode_table[j] = entry; - j += stride; - } - //advance to the next codeword - if codeword == (1 << len) - 1 - { - // last codeword - return Ok(()); - } - - let adv = BITS - (codeword ^ ((1 << len) - 1)).leading_zeros(); - let bit = 1 << adv; - - codeword &= bit - 1; - codeword |= bit; - count -= 1; - - while count == 0 - { - len += 1; - count = len_counts[len]; - } - } - } -} - -const RESIZE_BY: usize = 1024 * 4; // 4 kb - -/// Resize vector if its current space wont -/// be able to store a new byte and then push an element to that new space -#[inline(always)] -fn resize_and_push(buf: &mut Vec, position: usize, elm: u8) -{ - if buf.len() <= position - { - let new_len = buf.len() + RESIZE_BY; - buf.resize(new_len, 0); - } - buf[position] = elm; -} diff --git a/vendor/zune-inflate/src/encoder.rs b/vendor/zune-inflate/src/encoder.rs deleted file mode 100644 index f53f599..0000000 --- a/vendor/zune-inflate/src/encoder.rs +++ /dev/null @@ -1,217 +0,0 @@ -/* - * Copyright (c) 2023. - * - * This software is free software; You can redistribute it or modify it under terms of the MIT, Apache License or Zlib license - */ - -use alloc::vec; -use alloc::vec::Vec; - -use crate::constants::DEFLATE_BLOCKTYPE_UNCOMPRESSED; - -mod fast_match_finder; - -const _SEQ_LENGTH_SHIFT: u32 = 23; - -const _SEQ_LITRUNLEN_MASK: u32 = (1_u32 << _SEQ_LENGTH_SHIFT) - 1; - -pub(crate) struct _Sequence -{ - /* - * Bits 0..22: the number of literals in this run. This may be 0 and - * can be at most MAX_BLOCK_LENGTH. The literals are not stored - * explicitly in this structure; instead, they are read directly from - * the uncompressed data. - * - * Bits 23..31: the length of the match which follows the literals, or 0 - * if this literal run was the last in the block, so there is no match - * which follows it. - */ - litrunlen_and_length: u32 -} - -#[derive(Debug, Copy, Clone)] -pub enum DeflateEncodingStrategy -{ - NoCompression -} - -impl DeflateEncodingStrategy -{ - #[allow(dead_code)] - fn to_level(self) -> u8 - { - match self - { - Self::NoCompression => 0 - } - } -} - -pub struct DeflateEncodingOptions -{ - strategy: DeflateEncodingStrategy -} - -impl Default for DeflateEncodingOptions -{ - fn default() -> Self - { - DeflateEncodingOptions { - strategy: DeflateEncodingStrategy::NoCompression - } - } -} - -/// A simple Deflate Encoder. -/// -/// Not yet complete -pub struct DeflateEncoder<'a> -{ - data: &'a [u8], - options: DeflateEncodingOptions, - output_position: usize, - input_position: usize, - output: Vec -} - -impl<'a> DeflateEncoder<'a> -{ - /// Create a new deflate encoder. - /// - /// The - pub fn new(data: &'a [u8]) -> DeflateEncoder<'a> - { - DeflateEncoder::new_with_options(data, DeflateEncodingOptions::default()) - } - pub fn new_with_options(data: &'a [u8], options: DeflateEncodingOptions) -> DeflateEncoder<'a> - { - let length = data.len() + 1024; - let out_array = vec![0; length]; - - DeflateEncoder { - data, - options, - output_position: 0, - input_position: 0, - output: out_array - } - } - - #[cfg(feature = "zlib")] - fn write_zlib_header(&mut self) - { - const ZLIB_CM_DEFLATE: u16 = 8; - const ZLIB_CINFO_32K_WINDOW: u16 = 7; - - let level_hint = self.options.strategy.to_level(); - - let mut hdr = (ZLIB_CM_DEFLATE << 8) | (ZLIB_CINFO_32K_WINDOW << 12); - - hdr |= u16::from(level_hint) << 6; - hdr |= 31 - (hdr % 31); - - self.output[self.output_position..self.output_position + 2] - .copy_from_slice(&hdr.to_be_bytes()); - } - /// Encode a deflate data block with no compression - /// - /// # Argument - /// - `bytes`: number of bytes to compress from input as non-compressed - /// bytes - fn encode_no_compression(&mut self, bytes: usize) - { - let final_position = self.input_position + bytes; - - /* - * If the input is zero-length, we still must output a block in order - * for the output to be a valid DEFLATE stream. Handle this case - * specially to avoid potentially passing NULL to memcpy() below. - */ - if self.data.is_empty() - { - /* BFINAL and BTYPE */ - self.output[self.output_position] = (1 | (DEFLATE_BLOCKTYPE_UNCOMPRESSED << 1)) as u8; - self.output_position += 1; - /* LEN and NLEN */ - let num: u32 = 0xFFFF0000; - self.output[self.output_position..self.output_position + 4] - .copy_from_slice(&num.to_le_bytes()); - self.output_position += 4; - return; - } - loop - { - let mut bfinal = 0; - let mut len = usize::from(u16::MAX); - - if final_position - self.input_position <= usize::from(u16::MAX) - { - bfinal = 1; - len = final_position - self.input_position; - } - /* - * Output BFINAL and BTYPE. The stream is already byte-aligned - * here, so this step always requires outputting exactly 1 byte. - */ - self.output[self.output_position] = - (bfinal | (DEFLATE_BLOCKTYPE_UNCOMPRESSED << 1)) as u8; - - self.output_position += 1; - // output len and nlen - let len_u16 = len as u16; - - self.output[self.output_position..self.output_position + 2] - .copy_from_slice(&len_u16.to_le_bytes()); - self.output_position += 2; - - self.output[self.output_position..self.output_position + 2] - .copy_from_slice(&(!len_u16).to_le_bytes()); - self.output_position += 2; - - // copy from input to output - self.output[self.output_position..self.output_position + len] - .copy_from_slice(&self.data[self.input_position..self.input_position + len]); - self.output_position += len; - self.input_position += len; - - if self.input_position == final_position - { - break; - } - } - } - - /// Encode a deflate stream - pub fn encode_deflate(&mut self) - { - match self.options.strategy - { - DeflateEncodingStrategy::NoCompression => - { - self.encode_no_compression(self.data.len()); - } - } - } - - #[cfg(feature = "zlib")] - pub fn encode_zlib(&mut self) -> Vec - { - let extra = 40 * ((self.data.len() + 41) / 40); - self.output = vec![0_u8; self.data.len() + extra]; - self.write_zlib_header(); - self.output_position = 2; - - self.encode_deflate(); - - // add adler hash - let hash = crate::utils::calc_adler_hash(self.data); - self.output[self.output_position..self.output_position + 4] - .copy_from_slice(&hash.to_be_bytes()); - self.output_position += 4; - - self.output.truncate(self.output_position); - - core::mem::take(&mut self.output) - } -} diff --git a/vendor/zune-inflate/src/encoder/fast_match_finder.rs b/vendor/zune-inflate/src/encoder/fast_match_finder.rs deleted file mode 100644 index dbc5c51..0000000 --- a/vendor/zune-inflate/src/encoder/fast_match_finder.rs +++ /dev/null @@ -1,11 +0,0 @@ -/* - * Copyright (c) 2023. - * - * This software is free software; - * - * You can redistribute it or modify it under terms of the MIT, Apache License or Zlib license - */ - -//! Fast match finder -//! -//! This implements a fast match finder that can match up to one previous match diff --git a/vendor/zune-inflate/src/errors.rs b/vendor/zune-inflate/src/errors.rs deleted file mode 100644 index b32124d..0000000 --- a/vendor/zune-inflate/src/errors.rs +++ /dev/null @@ -1,121 +0,0 @@ -//! Errors possible when decoding deflate/zlib/gzip -//! streams - -use alloc::string::String; -use alloc::vec; -use alloc::vec::Vec; -use core::fmt::{Debug, Display, Formatter}; - -/// A struct returned when decompression fails -/// -/// This struct contains two fields, -/// -/// - `error`:Tells you the error that actually occured. -/// - `data`: Gives you decoded data up until that point when -/// the error was encountered. -/// -/// One can recover data up to the error if they so wish but -/// guarantees about data state is not given -pub struct InflateDecodeErrors -{ - /// reason why decompression fails - pub error: DecodeErrorStatus, - /// Decoded data up until that decompression error - pub data: Vec -} - -impl InflateDecodeErrors -{ - /// Create a new decode wrapper with data being - /// how many bytes we actually decoded before hitting an error - /// - /// # Arguments - /// - `error`: Error encountered during decoding - /// - `data`: Data up to that point of decoding - /// - /// # Returns - /// Itself - pub fn new(error: DecodeErrorStatus, data: Vec) -> InflateDecodeErrors - { - InflateDecodeErrors { error, data } - } - /// Create a new decode wrapper with an empty vector - /// - /// # Arguments - /// - `error`: Error encountered during decoding. - pub fn new_with_error(error: DecodeErrorStatus) -> InflateDecodeErrors - { - InflateDecodeErrors::new(error, vec![]) - } -} - -impl Debug for InflateDecodeErrors -{ - fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result - { - writeln!(f, "{:?}", self.error) - } -} - -pub enum DecodeErrorStatus -{ - /// Input data is not enough to construct - /// a full output - InsufficientData, - /// Anything that isn't significant - Generic(&'static str), - /// Anything that isn't significant but we need to - /// pass back information to the user as to what went wrong - GenericStr(String), - ///Input data was malformed. - CorruptData, - /// Limit set by the user was exceeded by - /// decompressed output - OutputLimitExceeded(usize, usize), - /// Output CRC does not match stored CRC. - /// - /// Only present for zlib - MismatchedCRC(u32, u32), - /// Output Adler does not match stored adler - /// - /// Only present for gzip - MismatchedAdler(u32, u32) -} - -impl Debug for DecodeErrorStatus -{ - fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result - { - match self - { - Self::InsufficientData => writeln!(f, "Insufficient data"), - Self::Generic(reason) => writeln!(f, "{reason}"), - Self::GenericStr(reason) => writeln!(f, "{reason}"), - Self::CorruptData => writeln!(f, "Corrupt data"), - Self::OutputLimitExceeded(limit, current) => writeln!( - f, - "Output limit exceeded, set limit was {limit} and output size is {current}" - ), - Self::MismatchedCRC(expected, found) => - { - writeln!(f, "Mismatched CRC, expected {expected} but found {found}") - } - Self::MismatchedAdler(expected, found) => - { - writeln!(f, "Mismatched Adler, expected {expected} but found {found}") - } - } - } -} - -impl Display for InflateDecodeErrors -{ - #[allow(clippy::uninlined_format_args)] - fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result - { - writeln!(f, "{:?}", self) - } -} - -#[cfg(feature = "std")] -impl std::error::Error for InflateDecodeErrors {} diff --git a/vendor/zune-inflate/src/gzip_constants.rs b/vendor/zune-inflate/src/gzip_constants.rs deleted file mode 100644 index 6028d47..0000000 --- a/vendor/zune-inflate/src/gzip_constants.rs +++ /dev/null @@ -1,13 +0,0 @@ -#![cfg(feature = "gzip")] -pub const GZIP_ID1: u8 = 0x1F; -pub const GZIP_ID2: u8 = 0x8B; -pub const GZIP_CM_DEFLATE: u8 = 8; - -pub const GZIP_FRESERVED: u8 = 0xE0; -pub const GZIP_FEXTRA: u8 = 0x04; - -pub const GZIP_FOOTER_SIZE: usize = 8; - -pub const GZIP_FHCRC: u8 = 0x02; -pub const GZIP_FNAME: u8 = 0x08; -pub const GZIP_FCOMMENT: u8 = 0x10; diff --git a/vendor/zune-inflate/src/lib.rs b/vendor/zune-inflate/src/lib.rs deleted file mode 100644 index 6edc589..0000000 --- a/vendor/zune-inflate/src/lib.rs +++ /dev/null @@ -1,102 +0,0 @@ -/* - * Copyright (c) 2023. - * - * This software is free software; You can redistribute it or modify it under terms of the MIT, Apache License or Zlib license - */ - -//! An incredibly spiffy deflate decoder. -//! -//! This crate features a deflate/zlib decoder inspired by -//! Eric Bigger's [libdeflate]. -//! -//! This libary has a smaller set of features hence you should use it -//! if it aligns with your end goals. -//! -//! Use it if -//! - You want a smaller library footprint when compared to flate/miniz-oxide -//! - You want faster speeds than zlib-ng/zlib/miniz-oxide. -//! - You do full buffer decompression and not streaming decompression. -//! - You don't need compression support for now, it will come soon enough. -//! - You want a 100% safe, pure rust implementation with above. -//! -//!Do not use it if -//! - You want compression support, not yet there -//! - You stream your data, not compatible with this library -//! -//! ## Alternatives -//!- For the fastest speeds, check out [libdeflate] (C), if using Rust there is [libdeflater] which -//! provides bindings to [libdeflate] -//! -//!- For streaming support use [flate2-rs] with an appropriate backend(zlib-ng is recommended for speed) -//! -//! # Features -//! You can disable features depending on what you need. the following are -//! features present -//! - gzip: Enable gzip decoding -//! - zlib: Enable zlib decoding -//! -//! These features are enabled by default -//! -//! To disable a feature , modify Cargo.toml to disable default features -//! and add the needed feature , e.g below will include zlib decoding and disable gzip decoding -//! ```toml -//! zune-inflate={ version="0.2",default-features=false,feature=["zlib"]} -//! ``` -//! -//! # Errors -//! In case of an error, the library returns the error and the decoded -//! data up to when the error was encountered hence that data can be recovered -//! but no data further than that can be recovered -//! -//! -//! # Usage -//! -//! Decoding delfate data -// -//! ```no_run -//! use zune_inflate::DeflateDecoder; -//! let totally_valid_data = [0;23]; -//! let mut decoder = DeflateDecoder::new(&totally_valid_data); -//! -//! let decompressed =decoder.decode_deflate().unwrap(); -//! ``` -//! -//! Decoding zlib data -//! ```no_run -//! use zune_inflate::DeflateDecoder; -//! // yea this isn't valid -//! let totally_valid_data = [0;23]; -//! let mut decoder = DeflateDecoder::new(&totally_valid_data); -//! -//! let decompressed =decoder.decode_zlib().unwrap(); -//! ``` -//! -//! Decoding zlib data without confirming the adler32 checksum -//! ```no_run -//! use zune_inflate::DeflateDecoder; -//! use zune_inflate::DeflateOptions; -//! let totally_valid_data=[0;23]; -//! let mut options = DeflateOptions::default() -//! .set_confirm_checksum(false); -//! let decoder = DeflateDecoder::new_with_options(&totally_valid_data,options); -//! -//! ``` -//! -//! [libdeflate]: https://github.com/ebiggers/libdeflate -//! [libdeflater]: https://github.com/adamkewley/libdeflater -//! [flate2-rs]: https://github.com/rust-lang/flate2-rs -//! -#![cfg_attr(not(feature = "std"), no_std)] -extern crate alloc; - -pub use crate::decoder::{DeflateDecoder, DeflateOptions}; -pub use crate::encoder::DeflateEncoder; - -mod bitstream; -mod constants; -mod crc; -mod decoder; -mod encoder; -pub mod errors; -mod gzip_constants; -mod utils; diff --git a/vendor/zune-inflate/src/utils.rs b/vendor/zune-inflate/src/utils.rs deleted file mode 100644 index 56e20f9..0000000 --- a/vendor/zune-inflate/src/utils.rs +++ /dev/null @@ -1,79 +0,0 @@ -use core::cell::Cell; - -/// make_decode_table_entry() creates a decode table entry for the given symbol -/// by combining the static part 'decode_results[sym]' with the dynamic part -/// 'len', which is the remaining codeword length (the codeword length for main -/// table entries, or the codeword length minus TABLEBITS for subtable entries). -/// -/// In all cases, we add 'len' to each of the two low-order bytes to create the -/// appropriately-formatted decode table entry. See the definitions of the -/// *_decode_results[] arrays below, where the entry format is described. -pub(crate) fn make_decode_table_entry(decode_results: &[u32], sym: usize, len: u32) -> u32 -{ - decode_results[sym] + (len << 8) + len -} - -/// A safe version of src.copy_within that helps me because I tend to always -/// confuse the arguments -pub fn fixed_copy_within(dest: &mut [u8], src_offset: usize, dest_offset: usize) -{ - // for debug builds ensure we don't go out of bounds - debug_assert!( - dest_offset + SIZE <= dest.len(), - "[dst]: End position {} out of range for slice of length {}", - dest_offset + SIZE, - dest.len() - ); - - dest.copy_within(src_offset..src_offset + SIZE, dest_offset); -} - -#[inline(always)] -pub fn copy_rep_matches(dest: &mut [u8], offset: usize, dest_offset: usize, length: usize) -{ - // This is a slightly complicated rep match copier that has - // no bounds check. - - // The only invariant we need to uphold is dest[dest_offset] should - // copy from dest[offset] - // i.e in the first iteration, the first entry in the window will point - // to dest[offset] and the - // last entry will point to dest[dest_offset] - // it's easy to prove dest[offset] since we take our slice - // from offset. - // but proving dest[dest_offset] is trickier - // If we were at offset, to get to dest_offset, we could - // 1. Get difference between dest_offset and offset - // 2. Add that difference to offset. - // - - let diff = dest_offset - offset + 1; - - // note - for window in Cell::from_mut(&mut dest[offset..dest_offset + length + 2]) - .as_slice_of_cells() - .windows(diff) - { - window.last().unwrap().set(window[0].get()); - } -} - -/// Return the minimum of two usizes in a const context -#[rustfmt::skip] -pub const fn const_min_usize(a: usize, b: usize) -> usize -{ - if a < b { a } else { b } -} - -/// Calculate the adler hash of a piece of data. -#[inline(never)] -#[cfg(feature = "zlib")] -pub fn calc_adler_hash(data: &[u8]) -> u32 -{ - use simd_adler32::Adler32; - let mut hasher = Adler32::new(); - - hasher.write(data); - - hasher.finish() -} -- cgit v1.2.3