util/cbfstool/lzma/lzma.hh

#ifndef HHlzmaHH
#define HHlzmaHH

#include <vector>

extern int LZMA_verbose;

extern unsigned LZMA_NumFastBytes;
extern unsigned LZMA_AlgorithmNo;
extern unsigned LZMA_PosStateBits;
extern unsigned LZMA_LiteralPosStateBits;
extern unsigned LZMA_LiteralContextBits;

/* decompress LZMA-compressed data. */
const std::vector<unsigned char> LZMADeCompress
    (const unsigned char* data, std::size_t length);

const std::vector<unsigned char> LZMADeCompress
    (const unsigned char* data, std::size_t length, bool& ok);

static inline const std::vector<unsigned char> LZMADeCompress
    (const std::vector<unsigned char>& buf)
    { return LZMADeCompress(&buf[0], buf.size()); }

static inline const std::vector<unsigned char> LZMADeCompress
    (const std::vector<unsigned char>& buf, bool& ok)
    { return LZMADeCompress(&buf[0], buf.size(), ok); }

/* LZMA-compress data with current settings. */
const std::vector<unsigned char> LZMACompress
    (const unsigned char* data, std::size_t length);

static inline const std::vector<unsigned char> LZMACompress
    (const std::vector<unsigned char>& buf)
        { return LZMACompress(&buf[0], buf.size()); }

/* LZMA-compress data with given settings. */
const std::vector<unsigned char> LZMACompress
    (const unsigned char* data, std::size_t length,
     unsigned pb,
     unsigned lp,
     unsigned lc);

static inline const std::vector<unsigned char> LZMACompress
    (const std::vector<unsigned char>& buf,
     unsigned pb,
     unsigned lp,
     unsigned lc)
     { return LZMACompress(&buf[0], buf.size(), pb,lp,lc); }

const std::vector<unsigned char> LZMACompress(
    const unsigned char* data, std::size_t length,
    unsigned pb,
    unsigned lp,
    unsigned lc,
    unsigned dictionarysize);

static inline const std::vector<unsigned char> LZMACompress(
    const std::vector<unsigned char>& buf,
    unsigned pb,
    unsigned lp,
    unsigned lc,
    unsigned dictionarysize)
    { return LZMACompress(&buf[0], buf.size(), pb,lp,lc,dictionarysize); }

/* LZMA-compress data with every settings (5*5*9 times), taking the best.
 * It will consume a lot of time and output useful statistics,
 * so a context parameter ("why") is also given.
 */
const std::vector<unsigned char> LZMACompressHeavy
    (const unsigned char* data, std::size_t length,
     const char* why = "?");

const std::vector<unsigned char> LZMACompressAuto
    (const unsigned char* data, std::size_t length,
     const char* why = "?");

static inline const std::vector<unsigned char> LZMACompressHeavy
    (const std::vector<unsigned char>& buf,
     const char* why = "?")
     { return LZMACompressHeavy(&buf[0],buf.size(),why); }

static inline const std::vector<unsigned char> LZMACompressAuto
    (const std::vector<unsigned char>& buf,
     const char* why = "?")
     { return LZMACompressAuto(&buf[0],buf.size(),why); }

const std::vector<unsigned char>
    DoLZMACompress(int HeavyLevel,
        const unsigned char* data,
        std::size_t          length,
        const char* why = "?");

static inline const std::vector<unsigned char>
    DoLZMACompress(int HeavyLevel,
        const std::vector<unsigned char>& data, const char* why = "?")
    { return DoLZMACompress(HeavyLevel, &data[0], data.size(), why); }


/*
LZMA compressed file format
 ---------------------------
 Offset Size Description
   0     1   Special LZMA properties for compressed data
   1     4   Dictionary size (little endian)
   5     8   Uncompressed size (little endian). -1 means unknown size
  13         Compressed data
*/
#endif