57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
|
/* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder
|
||
|
|
2009-08-14 : Igor Pavlov : Public domain */
|
||
|
|
|
||
|
|
#include "Lzma86.h"
|
||
|
|
|
||
|
|
#include "Alloc.h"
|
||
|
|
#include "Bra.h"
|
||
|
|
#include "LzmaDec.h"
|
||
|
|
|
||
|
|
static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
|
||
|
|
static void SzFree(void *p, void *address) { p = p; MyFree(address); }
|
||
|
|
|
||
|
|
SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize)
|
||
|
|
{
|
||
|
|
unsigned i;
|
||
|
|
if (srcLen < LZMA86_HEADER_SIZE)
|
||
|
|
return SZ_ERROR_INPUT_EOF;
|
||
|
|
*unpackSize = 0;
|
||
|
|
for (i = 0; i < sizeof(UInt64); i++)
|
||
|
|
*unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i);
|
||
|
|
return SZ_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen)
|
||
|
|
{
|
||
|
|
ISzAlloc g_Alloc = { SzAlloc, SzFree };
|
||
|
|
SRes res;
|
||
|
|
int useFilter;
|
||
|
|
SizeT inSizePure;
|
||
|
|
ELzmaStatus status;
|
||
|
|
|
||
|
|
if (*srcLen < LZMA86_HEADER_SIZE)
|
||
|
|
return SZ_ERROR_INPUT_EOF;
|
||
|
|
|
||
|
|
useFilter = src[0];
|
||
|
|
|
||
|
|
if (useFilter > 1)
|
||
|
|
{
|
||
|
|
*destLen = 0;
|
||
|
|
return SZ_ERROR_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
inSizePure = *srcLen - LZMA86_HEADER_SIZE;
|
||
|
|
res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure,
|
||
|
|
src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc);
|
||
|
|
*srcLen = inSizePure + LZMA86_HEADER_SIZE;
|
||
|
|
if (res != SZ_OK)
|
||
|
|
return res;
|
||
|
|
if (useFilter == 1)
|
||
|
|
{
|
||
|
|
UInt32 x86State;
|
||
|
|
x86_Convert_Init(x86State);
|
||
|
|
x86_Convert(dest, *destLen, 0, &x86State, 0);
|
||
|
|
}
|
||
|
|
return SZ_OK;
|
||
|
|
}
|