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https://github.com/Xevion/easy7zip.git
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164 lines
3.9 KiB
C
164 lines
3.9 KiB
C
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/**
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* Copyright (c) 2016 Tino Reichardt
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* You can contact the author at:
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* - zstdmt source repository: https://github.com/mcmilk/zstdmt
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*/
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/* ***************************************
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* Defines
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****************************************/
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#ifndef LZ5MT_H
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#define LZ5MT_H
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#include <stddef.h> /* size_t */
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/* current maximum the library will accept */
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#define LZ5MT_THREAD_MAX 128
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#define LZ5MT_LEVEL_MAX 16
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#define LZ5FMT_MAGICNUMBER 0x184D2205U
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#define LZ5FMT_MAGIC_SKIPPABLE 0x184D2A50U
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/* **************************************
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* Error Handling
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****************************************/
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extern size_t lz5mt_errcode;
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typedef enum {
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LZ5MT_error_no_error,
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LZ5MT_error_memory_allocation,
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LZ5MT_error_read_fail,
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LZ5MT_error_write_fail,
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LZ5MT_error_data_error,
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LZ5MT_error_frame_compress,
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LZ5MT_error_frame_decompress,
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LZ5MT_error_compressionParameter_unsupported,
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LZ5MT_error_compression_library,
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LZ5MT_error_canceled,
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LZ5MT_error_maxCode
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} LZ5MT_ErrorCode;
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#ifdef ERROR
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# undef ERROR /* reported already defined on VS 2015 (Rich Geldreich) */
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#endif
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#define PREFIX(name) LZ5MT_error_##name
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#define ERROR(name) ((size_t)-PREFIX(name))
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extern unsigned LZ5MT_isError(size_t code);
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extern const char* LZ5MT_getErrorString(size_t code);
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/* **************************************
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* Structures
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****************************************/
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typedef struct {
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void *buf; /* ptr to data */
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size_t size; /* current filled in buf */
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size_t allocated; /* length of buf */
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} LZ5MT_Buffer;
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/**
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* reading and writing functions
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* - you can use stdio functions or plain read/write
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* - just write some wrapper on your own
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* - a sample is given in 7-Zip ZS
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*/
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typedef int (fn_read) (void *args, LZ5MT_Buffer * in);
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typedef int (fn_write) (void *args, LZ5MT_Buffer * out);
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typedef struct {
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fn_read *fn_read;
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void *arg_read;
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fn_write *fn_write;
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void *arg_write;
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} LZ5MT_RdWr_t;
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/* **************************************
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* Compression
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****************************************/
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typedef struct LZ5MT_CCtx_s LZ5MT_CCtx;
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/**
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* 1) allocate new cctx
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* - return cctx or zero on error
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*
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* @level - 1 .. 16
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* @threads - 1 .. LZ5MT_THREAD_MAX
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* @inputsize - if zero, becomes some optimal value for the level
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* - if nonzero, the given value is taken
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*/
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LZ5MT_CCtx *LZ5MT_createCCtx(int threads, int level, int inputsize);
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/**
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* 2) threaded compression
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* - return -1 on error
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*/
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size_t LZ5MT_compressCCtx(LZ5MT_CCtx * ctx, LZ5MT_RdWr_t * rdwr);
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/**
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* 3) get some statistic
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*/
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size_t LZ5MT_GetFramesCCtx(LZ5MT_CCtx * ctx);
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size_t LZ5MT_GetInsizeCCtx(LZ5MT_CCtx * ctx);
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size_t LZ5MT_GetOutsizeCCtx(LZ5MT_CCtx * ctx);
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/**
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* 4) free cctx
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* - no special return value
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*/
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void LZ5MT_freeCCtx(LZ5MT_CCtx * ctx);
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/* **************************************
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* Decompression - TODO, but it's easy...
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****************************************/
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typedef struct LZ5MT_DCtx_s LZ5MT_DCtx;
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/**
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* 1) allocate new cctx
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* - return cctx or zero on error
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*
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* @level - 1 .. 22
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* @threads - 1 .. LZ5MT_THREAD_MAX
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* @srclen - the max size of src for LZ5MT_CompressCCtx()
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* @dstlen - the min size of dst
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*/
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LZ5MT_DCtx *LZ5MT_createDCtx(int threads, int inputsize);
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/**
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* 2) threaded compression
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* - return -1 on error
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*/
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size_t LZ5MT_decompressDCtx(LZ5MT_DCtx * ctx, LZ5MT_RdWr_t * rdwr);
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/**
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* 3) get some statistic
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*/
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size_t LZ5MT_GetFramesDCtx(LZ5MT_DCtx * ctx);
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size_t LZ5MT_GetInsizeDCtx(LZ5MT_DCtx * ctx);
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size_t LZ5MT_GetOutsizeDCtx(LZ5MT_DCtx * ctx);
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/**
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* 4) free cctx
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* - no special return value
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*/
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void LZ5MT_freeDCtx(LZ5MT_DCtx * ctx);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* LZ5MT_H */
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