chromium/third_party/lzma_sdk/C/Lzma2Dec.c

/* Lzma2Dec.c -- LZMA2 Decoder
2021-02-09 : Igor Pavlov : Public domain */

/* #define SHOW_DEBUG_INFO */

#include "Precomp.h"

#ifdef SHOW_DEBUG_INFO
#include <stdio.h>
#endif

#include <string.h>

#include "Lzma2Dec.h"

/*
00000000  -  End of data
00000001 U U  -  Uncompressed, reset dic, need reset state and set new prop
00000010 U U  -  Uncompressed, no reset
100uuuuu U U P P  -  LZMA, no reset
101uuuuu U U P P  -  LZMA, reset state
110uuuuu U U P P S  -  LZMA, reset state + set new prop
111uuuuu U U P P S  -  LZMA, reset state + set new prop, reset dic

  u, U - Unpack Size
  P - Pack Size
  S - Props
*/

#define LZMA2_CONTROL_COPY_RESET_DIC …

#define LZMA2_IS_UNCOMPRESSED_STATE(p) …

#define LZMA2_LCLP_MAX …
#define LZMA2_DIC_SIZE_FROM_PROP(p) …

#ifdef SHOW_DEBUG_INFO
#define PRF …
#else
#define PRF(x) …
#endif

ELzma2State;

static SRes Lzma2Dec_GetOldProps(Byte prop, Byte *props)
{ … }

SRes Lzma2Dec_AllocateProbs(CLzma2Dec *p, Byte prop, ISzAllocPtr alloc)
{ … }

SRes Lzma2Dec_Allocate(CLzma2Dec *p, Byte prop, ISzAllocPtr alloc)
{ … }

void Lzma2Dec_Init(CLzma2Dec *p)
{ … }

// ELzma2State
static unsigned Lzma2Dec_UpdateState(CLzma2Dec *p, Byte b)
{ … }

static void LzmaDec_UpdateWithUncompressed(CLzmaDec *p, const Byte *src, SizeT size)
{ … }

void LzmaDec_InitDicAndState(CLzmaDec *p, BoolInt initDic, BoolInt initState);


SRes Lzma2Dec_DecodeToDic(CLzma2Dec *p, SizeT dicLimit,
    const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
{ … }




ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
    SizeT outSize,
    const Byte *src, SizeT *srcLen,
    int checkFinishBlock)
{ … }




SRes Lzma2Dec_DecodeToBuf(CLzma2Dec *p, Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
{ … }


SRes Lzma2Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
    Byte prop, ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAllocPtr alloc)
{ … }