diff options
Diffstat (limited to 'thirdparty/misc/fastlz.h')
| -rw-r--r-- | thirdparty/misc/fastlz.h | 60 |
1 files changed, 29 insertions, 31 deletions
diff --git a/thirdparty/misc/fastlz.h b/thirdparty/misc/fastlz.h index e5ca8dfc02..e53dbfbb56 100644 --- a/thirdparty/misc/fastlz.h +++ b/thirdparty/misc/fastlz.h @@ -1,9 +1,6 @@ /* - FastLZ - lightning-fast lossless compression library - - Copyright (C) 2007 Ariya Hidayat (ariya@kde.org) - Copyright (C) 2006 Ariya Hidayat (ariya@kde.org) - Copyright (C) 2005 Ariya Hidayat (ariya@kde.org) + FastLZ - Byte-aligned LZ77 compression library + Copyright (C) 2005-2020 Ariya Hidayat <ariya.hidayat@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal @@ -27,15 +24,15 @@ #ifndef FASTLZ_H #define FASTLZ_H -#define FASTLZ_VERSION 0x000100 +#define FASTLZ_VERSION 0x000500 -#define FASTLZ_VERSION_MAJOR 0 -#define FASTLZ_VERSION_MINOR 0 -#define FASTLZ_VERSION_REVISION 0 +#define FASTLZ_VERSION_MAJOR 0 +#define FASTLZ_VERSION_MINOR 5 +#define FASTLZ_VERSION_REVISION 0 -#define FASTLZ_VERSION_STRING "0.1.0" +#define FASTLZ_VERSION_STRING "0.5.0" -#if defined (__cplusplus) +#if defined(__cplusplus) extern "C" { #endif @@ -51,9 +48,18 @@ extern "C" { length (input buffer size). The input buffer and the output buffer can not overlap. + + Compression level can be specified in parameter level. At the moment, + only level 1 and level 2 are supported. + Level 1 is the fastest compression and generally useful for short data. + Level 2 is slightly slower but it gives better compression ratio. + + Note that the compressed data, regardless of the level, can always be + decompressed using the function fastlz_decompress below. */ -int fastlz_compress(const void* input, int length, void* output); +int fastlz_compress_level(int level, const void* input, int length, + void* output); /** Decompress a block of compressed data and returns the size of the @@ -65,35 +71,27 @@ int fastlz_compress(const void* input, int length, void* output); Decompression is memory safe and guaranteed not to write the output buffer more than what is specified in maxout. + + Note that the decompression will always work, regardless of the + compression level specified in fastlz_compress_level above (when + producing the compressed block). */ int fastlz_decompress(const void* input, int length, void* output, int maxout); /** - Compress a block of data in the input buffer and returns the size of - compressed block. The size of input buffer is specified by length. The - minimum input buffer size is 16. + DEPRECATED. - The output buffer must be at least 5% larger than the input buffer - and can not be smaller than 66 bytes. - - If the input is not compressible, the return value might be larger than - length (input buffer size). + This is similar to fastlz_compress_level above, but with the level + automatically chosen. - The input buffer and the output buffer can not overlap. - - Compression level can be specified in parameter level. At the moment, - only level 1 and level 2 are supported. - Level 1 is the fastest compression and generally useful for short data. - Level 2 is slightly slower but it gives better compression ratio. - - Note that the compressed data, regardless of the level, can always be - decompressed using the function fastlz_decompress above. + This function is deprecated and it will be completely removed in some future + version. */ -int fastlz_compress_level(int level, const void* input, int length, void* output); +int fastlz_compress(const void* input, int length, void* output); -#if defined (__cplusplus) +#if defined(__cplusplus) } #endif |