third_party/lzma_sdk/LzmaLib.c

   1 /* LzmaLib.c -- LZMA library wrapper
   2 2008-08-05
   3 Igor Pavlov
   4 Public domain */
   5
   6 #include "LzmaEnc.h"
   7 #include "LzmaDec.h"
   8 #include "Alloc.h"
   9 #include "LzmaLib.h"
  10
  11 static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
  12 static void SzFree(void *p, void *address) { p = p; MyFree(address); }
  13 static ISzAlloc g_Alloc = { SzAlloc, SzFree };
  14
  15 MY_STDAPI LzmaCompress(unsigned char *dest, size_t  *destLen, const unsigned char *src, size_t  srcLen,
  16   unsigned char *outProps, size_t *outPropsSize,
  17   int level, /* 0 <= level <= 9, default = 5 */
  18   unsigned dictSize, /* use (1 << N) or (3 << N). 4 KB < dictSize <= 128 MB */
  19   int lc, /* 0 <= lc <= 8, default = 3  */
  20   int lp, /* 0 <= lp <= 4, default = 0  */
  21   int pb, /* 0 <= pb <= 4, default = 2  */
  22   int fb,  /* 5 <= fb <= 273, default = 32 */
  23   int numThreads /* 1 or 2, default = 2 */
  24 )
  25 {
  26   CLzmaEncProps props;
  27   LzmaEncProps_Init(&props);
  28   props.level = level;
  29   props.dictSize = dictSize;
  30   props.lc = lc;
  31   props.lp = lp;
  32   props.pb = pb;
  33   props.fb = fb;
  34   props.numThreads = numThreads;
  35
  36   return LzmaEncode(dest, destLen, src, srcLen, &props, outProps, outPropsSize, 0,
  37       NULL, &g_Alloc, &g_Alloc);
  38 }
  39
  40
  41 MY_STDAPI LzmaUncompress(unsigned char *dest, size_t  *destLen, const unsigned char *src, size_t  *srcLen,
  42   const unsigned char *props, size_t propsSize)
  43 {
  44   ELzmaStatus status;
  45   return LzmaDecode(dest, destLen, src, srcLen, props, (unsigned)propsSize, LZMA_FINISH_ANY, &status, &g_Alloc);
  46 }