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      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 }
     47