78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
|
|
* Written in 2009 by Lloyd Hilaiel
|
|
*
|
|
* License
|
|
*
|
|
* All the cruft you find here is public domain. You don't have to credit
|
|
* anyone to use this code, but my personal request is that you mention
|
|
* Igor Pavlov for his hard, high quality work.
|
|
*
|
|
* compress.h - the API for LZMA compression using easylzma
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "common.h"
|
|
#include <stdlib.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/** suggested default values */
|
|
#define ELZMA_LC_DEFAULT 3
|
|
#define ELZMA_LP_DEFAULT 0
|
|
#define ELZMA_PB_DEFAULT 2
|
|
#define ELZMA_DICT_SIZE_DEFAULT_MAX (1 << 24)
|
|
|
|
/** an opaque handle to an lzma compressor */
|
|
typedef struct _elzma_compress_handle *elzma_compress_handle;
|
|
|
|
/**
|
|
* Allocate a handle to an LZMA compressor object.
|
|
*/
|
|
elzma_compress_handle EASYLZMA_API elzma_compress_alloc();
|
|
|
|
/**
|
|
* set allocation routines (optional, if not called malloc & free will
|
|
* be used)
|
|
*/
|
|
void EASYLZMA_API
|
|
elzma_compress_set_allocation_callbacks(elzma_compress_handle hand, elzma_malloc mallocFunc,
|
|
void *mallocFuncContext, elzma_free freeFunc,
|
|
void *freeFuncContext);
|
|
|
|
/**
|
|
* Free all data associated with an LZMA compressor object.
|
|
*/
|
|
void EASYLZMA_API elzma_compress_free(elzma_compress_handle *hand);
|
|
|
|
/**
|
|
* Set configuration paramters for a compression run. If not called,
|
|
* reasonable defaults will be used.
|
|
*/
|
|
int EASYLZMA_API elzma_compress_config(elzma_compress_handle hand, unsigned char lc,
|
|
unsigned char lp, unsigned char pb, unsigned char level,
|
|
unsigned int dictionarySize, elzma_file_format format,
|
|
unsigned long long uncompressedSize);
|
|
|
|
/**
|
|
* Run compression
|
|
*/
|
|
int EASYLZMA_API
|
|
elzma_compress_run(elzma_compress_handle hand, elzma_read_callback inputStream,
|
|
void *inputContext, elzma_write_callback outputStream, void *outputContext,
|
|
elzma_progress_callback progressCallback, void *progressContext);
|
|
|
|
/**
|
|
* a heuristic utility routine to guess a dictionary size that gets near
|
|
* optimal compression while reducing memory usage.
|
|
* accepts a size in bytes, returns a proposed dictionary size
|
|
*/
|
|
unsigned int EASYLZMA_API elzma_get_dict_size(unsigned long long size);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
;
|
|
#endif
|