1/* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder
 22016-05-16 : Igor Pavlov : Public domain */
 3
 4#include "Precomp.h"
 5
 6#include "Lzma86.h"
 7
 8#include "Alloc.h"
 9#include "Bra.h"
10#include "LzmaDec.h"
11
12SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize)
13{
14  unsigned i;
15  if (srcLen < LZMA86_HEADER_SIZE)
16    return SZ_ERROR_INPUT_EOF;
17  *unpackSize = 0;
18  for (i = 0; i < sizeof(UInt64); i++)
19    *unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i);
20  return SZ_OK;
21}
22
23SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen)
24{
25  SRes res;
26  int useFilter;
27  SizeT inSizePure;
28  ELzmaStatus status;
29
30  if (*srcLen < LZMA86_HEADER_SIZE)
31    return SZ_ERROR_INPUT_EOF;
32
33  useFilter = src[0];
34
35  if (useFilter > 1)
36  {
37    *destLen = 0;
38    return SZ_ERROR_UNSUPPORTED;
39  }
40
41  inSizePure = *srcLen - LZMA86_HEADER_SIZE;
42  res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure,
43      src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc);
44  *srcLen = inSizePure + LZMA86_HEADER_SIZE;
45  if (res != SZ_OK)
46    return res;
47  if (useFilter == 1)
48  {
49    UInt32 x86State;
50    x86_Convert_Init(x86State);
51    x86_Convert(dest, *destLen, 0, &x86State, 0);
52  }
53  return SZ_OK;
54}