mirror of
https://github.com/Xevion/easy7zip.git
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165 lines
4.2 KiB
C
165 lines
4.2 KiB
C
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/**
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* Copyright (c) 2016 - 2017 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 LIZARDMT_H
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#define LIZARDMT_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 LIZARDMT_THREAD_MAX 128
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#define LIZARDMT_LEVEL_MIN 10
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#define LIZARDMT_LEVEL_MAX 49
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#define LIZARDFMT_MAGICNUMBER 0x184D2206U
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#define LIZARDFMT_MAGIC_SKIPPABLE 0x184D2A50U
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/* **************************************
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* Error Handling
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****************************************/
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extern size_t lizardmt_errcode;
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typedef enum {
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LIZARDMT_error_no_error,
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LIZARDMT_error_memory_allocation,
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LIZARDMT_error_read_fail,
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LIZARDMT_error_write_fail,
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LIZARDMT_error_data_error,
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LIZARDMT_error_frame_compress,
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LIZARDMT_error_frame_decompress,
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LIZARDMT_error_compressionParameter_unsupported,
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LIZARDMT_error_compression_library,
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LIZARDMT_error_canceled,
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LIZARDMT_error_maxCode
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} LIZARDMT_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) LIZARDMT_error_##name
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#define ERROR(name) ((size_t)-PREFIX(name))
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extern unsigned LIZARDMT_isError(size_t code);
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extern const char* LIZARDMT_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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} LIZARDMT_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 or lizardmt.c
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* - the function should return -1 on error and zero on success
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* - the read or written bytes will go to in->size or out->size
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*/
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typedef int (fn_read) (void *args, LIZARDMT_Buffer * in);
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typedef int (fn_write) (void *args, LIZARDMT_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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} LIZARDMT_RdWr_t;
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/* **************************************
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* Compression
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****************************************/
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typedef struct LIZARDMT_CCtx_s LIZARDMT_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 .. 9
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* @threads - 1 .. LIZARDMT_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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LIZARDMT_CCtx *LIZARDMT_createCCtx(int threads, int level, int inputsize);
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/**
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* 2) threaded compression
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* - errorcheck via
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*/
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size_t LIZARDMT_compressCCtx(LIZARDMT_CCtx * ctx, LIZARDMT_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 LIZARDMT_GetFramesCCtx(LIZARDMT_CCtx * ctx);
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size_t LIZARDMT_GetInsizeCCtx(LIZARDMT_CCtx * ctx);
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size_t LIZARDMT_GetOutsizeCCtx(LIZARDMT_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 LIZARDMT_freeCCtx(LIZARDMT_CCtx * ctx);
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/* **************************************
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* Decompression
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****************************************/
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typedef struct LIZARDMT_DCtx_s LIZARDMT_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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* @threads - 1 .. LIZARDMT_THREAD_MAX
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* @ inputsize - used for single threaded standard lizard format without skippable frames
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*/
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LIZARDMT_DCtx *LIZARDMT_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 LIZARDMT_decompressDCtx(LIZARDMT_DCtx * ctx, LIZARDMT_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 LIZARDMT_GetFramesDCtx(LIZARDMT_DCtx * ctx);
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size_t LIZARDMT_GetInsizeDCtx(LIZARDMT_DCtx * ctx);
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size_t LIZARDMT_GetOutsizeDCtx(LIZARDMT_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 LIZARDMT_freeDCtx(LIZARDMT_DCtx * ctx);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* LIZARDMT_H */
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