mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-11-18 18:21:38 +00:00
718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
488 lines
12 KiB
C
488 lines
12 KiB
C
/* Lzma2Dec.c -- LZMA2 Decoder
|
|
2019-02-02 : 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 1
|
|
|
|
#define LZMA2_IS_UNCOMPRESSED_STATE(p) (((p)->control & (1 << 7)) == 0)
|
|
|
|
#define LZMA2_LCLP_MAX 4
|
|
#define LZMA2_DIC_SIZE_FROM_PROP(p) (((UInt32)2 | ((p) & 1)) << ((p) / 2 + 11))
|
|
|
|
#ifdef SHOW_DEBUG_INFO
|
|
#define PRF(x) x
|
|
#else
|
|
#define PRF(x)
|
|
#endif
|
|
|
|
typedef enum
|
|
{
|
|
LZMA2_STATE_CONTROL,
|
|
LZMA2_STATE_UNPACK0,
|
|
LZMA2_STATE_UNPACK1,
|
|
LZMA2_STATE_PACK0,
|
|
LZMA2_STATE_PACK1,
|
|
LZMA2_STATE_PROP,
|
|
LZMA2_STATE_DATA,
|
|
LZMA2_STATE_DATA_CONT,
|
|
LZMA2_STATE_FINISHED,
|
|
LZMA2_STATE_ERROR
|
|
} ELzma2State;
|
|
|
|
static SRes Lzma2Dec_GetOldProps(Byte prop, Byte *props)
|
|
{
|
|
UInt32 dicSize;
|
|
if (prop > 40)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
dicSize = (prop == 40) ? 0xFFFFFFFF : LZMA2_DIC_SIZE_FROM_PROP(prop);
|
|
props[0] = (Byte)LZMA2_LCLP_MAX;
|
|
props[1] = (Byte)(dicSize);
|
|
props[2] = (Byte)(dicSize >> 8);
|
|
props[3] = (Byte)(dicSize >> 16);
|
|
props[4] = (Byte)(dicSize >> 24);
|
|
return SZ_OK;
|
|
}
|
|
|
|
SRes Lzma2Dec_AllocateProbs(CLzma2Dec *p, Byte prop, ISzAllocPtr alloc)
|
|
{
|
|
Byte props[LZMA_PROPS_SIZE];
|
|
RINOK(Lzma2Dec_GetOldProps(prop, props));
|
|
return LzmaDec_AllocateProbs(&p->decoder, props, LZMA_PROPS_SIZE, alloc);
|
|
}
|
|
|
|
SRes Lzma2Dec_Allocate(CLzma2Dec *p, Byte prop, ISzAllocPtr alloc)
|
|
{
|
|
Byte props[LZMA_PROPS_SIZE];
|
|
RINOK(Lzma2Dec_GetOldProps(prop, props));
|
|
return LzmaDec_Allocate(&p->decoder, props, LZMA_PROPS_SIZE, alloc);
|
|
}
|
|
|
|
void Lzma2Dec_Init(CLzma2Dec *p)
|
|
{
|
|
p->state = LZMA2_STATE_CONTROL;
|
|
p->needInitLevel = 0xE0;
|
|
p->isExtraMode = False;
|
|
p->unpackSize = 0;
|
|
|
|
// p->decoder.dicPos = 0; // we can use it instead of full init
|
|
LzmaDec_Init(&p->decoder);
|
|
}
|
|
|
|
static ELzma2State Lzma2Dec_UpdateState(CLzma2Dec *p, Byte b)
|
|
{
|
|
switch (p->state)
|
|
{
|
|
case LZMA2_STATE_CONTROL:
|
|
p->isExtraMode = False;
|
|
p->control = b;
|
|
PRF(printf("\n %8X", (unsigned)p->decoder.dicPos));
|
|
PRF(printf(" %02X", (unsigned)b));
|
|
if (b == 0)
|
|
return LZMA2_STATE_FINISHED;
|
|
if (LZMA2_IS_UNCOMPRESSED_STATE(p))
|
|
{
|
|
if (b == LZMA2_CONTROL_COPY_RESET_DIC)
|
|
p->needInitLevel = 0xC0;
|
|
else if (b > 2 || p->needInitLevel == 0xE0)
|
|
return LZMA2_STATE_ERROR;
|
|
}
|
|
else
|
|
{
|
|
if (b < p->needInitLevel)
|
|
return LZMA2_STATE_ERROR;
|
|
p->needInitLevel = 0;
|
|
p->unpackSize = (UInt32)(b & 0x1F) << 16;
|
|
}
|
|
return LZMA2_STATE_UNPACK0;
|
|
|
|
case LZMA2_STATE_UNPACK0:
|
|
p->unpackSize |= (UInt32)b << 8;
|
|
return LZMA2_STATE_UNPACK1;
|
|
|
|
case LZMA2_STATE_UNPACK1:
|
|
p->unpackSize |= (UInt32)b;
|
|
p->unpackSize++;
|
|
PRF(printf(" %7u", (unsigned)p->unpackSize));
|
|
return LZMA2_IS_UNCOMPRESSED_STATE(p) ? LZMA2_STATE_DATA : LZMA2_STATE_PACK0;
|
|
|
|
case LZMA2_STATE_PACK0:
|
|
p->packSize = (UInt32)b << 8;
|
|
return LZMA2_STATE_PACK1;
|
|
|
|
case LZMA2_STATE_PACK1:
|
|
p->packSize |= (UInt32)b;
|
|
p->packSize++;
|
|
// if (p->packSize < 5) return LZMA2_STATE_ERROR;
|
|
PRF(printf(" %5u", (unsigned)p->packSize));
|
|
return (p->control & 0x40) ? LZMA2_STATE_PROP : LZMA2_STATE_DATA;
|
|
|
|
case LZMA2_STATE_PROP:
|
|
{
|
|
unsigned lc, lp;
|
|
if (b >= (9 * 5 * 5))
|
|
return LZMA2_STATE_ERROR;
|
|
lc = b % 9;
|
|
b /= 9;
|
|
p->decoder.prop.pb = (Byte)(b / 5);
|
|
lp = b % 5;
|
|
if (lc + lp > LZMA2_LCLP_MAX)
|
|
return LZMA2_STATE_ERROR;
|
|
p->decoder.prop.lc = (Byte)lc;
|
|
p->decoder.prop.lp = (Byte)lp;
|
|
return LZMA2_STATE_DATA;
|
|
}
|
|
}
|
|
return LZMA2_STATE_ERROR;
|
|
}
|
|
|
|
static void LzmaDec_UpdateWithUncompressed(CLzmaDec *p, const Byte *src, SizeT size)
|
|
{
|
|
memcpy(p->dic + p->dicPos, src, size);
|
|
p->dicPos += size;
|
|
if (p->checkDicSize == 0 && p->prop.dicSize - p->processedPos <= size)
|
|
p->checkDicSize = p->prop.dicSize;
|
|
p->processedPos += (UInt32)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)
|
|
{
|
|
SizeT inSize = *srcLen;
|
|
*srcLen = 0;
|
|
*status = LZMA_STATUS_NOT_SPECIFIED;
|
|
|
|
while (p->state != LZMA2_STATE_ERROR)
|
|
{
|
|
SizeT dicPos;
|
|
|
|
if (p->state == LZMA2_STATE_FINISHED)
|
|
{
|
|
*status = LZMA_STATUS_FINISHED_WITH_MARK;
|
|
return SZ_OK;
|
|
}
|
|
|
|
dicPos = p->decoder.dicPos;
|
|
|
|
if (dicPos == dicLimit && finishMode == LZMA_FINISH_ANY)
|
|
{
|
|
*status = LZMA_STATUS_NOT_FINISHED;
|
|
return SZ_OK;
|
|
}
|
|
|
|
if (p->state != LZMA2_STATE_DATA && p->state != LZMA2_STATE_DATA_CONT)
|
|
{
|
|
if (*srcLen == inSize)
|
|
{
|
|
*status = LZMA_STATUS_NEEDS_MORE_INPUT;
|
|
return SZ_OK;
|
|
}
|
|
(*srcLen)++;
|
|
p->state = Lzma2Dec_UpdateState(p, *src++);
|
|
if (dicPos == dicLimit && p->state != LZMA2_STATE_FINISHED)
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
{
|
|
SizeT inCur = inSize - *srcLen;
|
|
SizeT outCur = dicLimit - dicPos;
|
|
ELzmaFinishMode curFinishMode = LZMA_FINISH_ANY;
|
|
|
|
if (outCur >= p->unpackSize)
|
|
{
|
|
outCur = (SizeT)p->unpackSize;
|
|
curFinishMode = LZMA_FINISH_END;
|
|
}
|
|
|
|
if (LZMA2_IS_UNCOMPRESSED_STATE(p))
|
|
{
|
|
if (inCur == 0)
|
|
{
|
|
*status = LZMA_STATUS_NEEDS_MORE_INPUT;
|
|
return SZ_OK;
|
|
}
|
|
|
|
if (p->state == LZMA2_STATE_DATA)
|
|
{
|
|
BoolInt initDic = (p->control == LZMA2_CONTROL_COPY_RESET_DIC);
|
|
LzmaDec_InitDicAndState(&p->decoder, initDic, False);
|
|
}
|
|
|
|
if (inCur > outCur)
|
|
inCur = outCur;
|
|
if (inCur == 0)
|
|
break;
|
|
|
|
LzmaDec_UpdateWithUncompressed(&p->decoder, src, inCur);
|
|
|
|
src += inCur;
|
|
*srcLen += inCur;
|
|
p->unpackSize -= (UInt32)inCur;
|
|
p->state = (p->unpackSize == 0) ? LZMA2_STATE_CONTROL : LZMA2_STATE_DATA_CONT;
|
|
}
|
|
else
|
|
{
|
|
SRes res;
|
|
|
|
if (p->state == LZMA2_STATE_DATA)
|
|
{
|
|
BoolInt initDic = (p->control >= 0xE0);
|
|
BoolInt initState = (p->control >= 0xA0);
|
|
LzmaDec_InitDicAndState(&p->decoder, initDic, initState);
|
|
p->state = LZMA2_STATE_DATA_CONT;
|
|
}
|
|
|
|
if (inCur > p->packSize)
|
|
inCur = (SizeT)p->packSize;
|
|
|
|
res = LzmaDec_DecodeToDic(&p->decoder, dicPos + outCur, src, &inCur, curFinishMode, status);
|
|
|
|
src += inCur;
|
|
*srcLen += inCur;
|
|
p->packSize -= (UInt32)inCur;
|
|
outCur = p->decoder.dicPos - dicPos;
|
|
p->unpackSize -= (UInt32)outCur;
|
|
|
|
if (res != 0)
|
|
break;
|
|
|
|
if (*status == LZMA_STATUS_NEEDS_MORE_INPUT)
|
|
{
|
|
if (p->packSize == 0)
|
|
break;
|
|
return SZ_OK;
|
|
}
|
|
|
|
if (inCur == 0 && outCur == 0)
|
|
{
|
|
if (*status != LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK
|
|
|| p->unpackSize != 0
|
|
|| p->packSize != 0)
|
|
break;
|
|
p->state = LZMA2_STATE_CONTROL;
|
|
}
|
|
|
|
*status = LZMA_STATUS_NOT_SPECIFIED;
|
|
}
|
|
}
|
|
}
|
|
|
|
*status = LZMA_STATUS_NOT_SPECIFIED;
|
|
p->state = LZMA2_STATE_ERROR;
|
|
return SZ_ERROR_DATA;
|
|
}
|
|
|
|
|
|
|
|
|
|
ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
|
|
SizeT outSize,
|
|
const Byte *src, SizeT *srcLen,
|
|
int checkFinishBlock)
|
|
{
|
|
SizeT inSize = *srcLen;
|
|
*srcLen = 0;
|
|
|
|
while (p->state != LZMA2_STATE_ERROR)
|
|
{
|
|
if (p->state == LZMA2_STATE_FINISHED)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_FINISHED_WITH_MARK;
|
|
|
|
if (outSize == 0 && !checkFinishBlock)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
|
|
|
|
if (p->state != LZMA2_STATE_DATA && p->state != LZMA2_STATE_DATA_CONT)
|
|
{
|
|
if (*srcLen == inSize)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
|
|
(*srcLen)++;
|
|
|
|
p->state = Lzma2Dec_UpdateState(p, *src++);
|
|
|
|
if (p->state == LZMA2_STATE_UNPACK0)
|
|
{
|
|
// if (p->decoder.dicPos != 0)
|
|
if (p->control == LZMA2_CONTROL_COPY_RESET_DIC || p->control >= 0xE0)
|
|
return LZMA2_PARSE_STATUS_NEW_BLOCK;
|
|
// if (outSize == 0) return LZMA_STATUS_NOT_FINISHED;
|
|
}
|
|
|
|
// The following code can be commented.
|
|
// It's not big problem, if we read additional input bytes.
|
|
// It will be stopped later in LZMA2_STATE_DATA / LZMA2_STATE_DATA_CONT state.
|
|
|
|
if (outSize == 0 && p->state != LZMA2_STATE_FINISHED)
|
|
{
|
|
// checkFinishBlock is true. So we expect that block must be finished,
|
|
// We can return LZMA_STATUS_NOT_SPECIFIED or LZMA_STATUS_NOT_FINISHED here
|
|
// break;
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
|
|
}
|
|
|
|
if (p->state == LZMA2_STATE_DATA)
|
|
return LZMA2_PARSE_STATUS_NEW_CHUNK;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (outSize == 0)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
|
|
|
|
{
|
|
SizeT inCur = inSize - *srcLen;
|
|
|
|
if (LZMA2_IS_UNCOMPRESSED_STATE(p))
|
|
{
|
|
if (inCur == 0)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
|
|
if (inCur > p->unpackSize)
|
|
inCur = p->unpackSize;
|
|
if (inCur > outSize)
|
|
inCur = outSize;
|
|
p->decoder.dicPos += inCur;
|
|
src += inCur;
|
|
*srcLen += inCur;
|
|
outSize -= inCur;
|
|
p->unpackSize -= (UInt32)inCur;
|
|
p->state = (p->unpackSize == 0) ? LZMA2_STATE_CONTROL : LZMA2_STATE_DATA_CONT;
|
|
}
|
|
else
|
|
{
|
|
p->isExtraMode = True;
|
|
|
|
if (inCur == 0)
|
|
{
|
|
if (p->packSize != 0)
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
|
|
}
|
|
else if (p->state == LZMA2_STATE_DATA)
|
|
{
|
|
p->state = LZMA2_STATE_DATA_CONT;
|
|
if (*src != 0)
|
|
{
|
|
// first byte of lzma chunk must be Zero
|
|
*srcLen += 1;
|
|
p->packSize--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (inCur > p->packSize)
|
|
inCur = (SizeT)p->packSize;
|
|
|
|
src += inCur;
|
|
*srcLen += inCur;
|
|
p->packSize -= (UInt32)inCur;
|
|
|
|
if (p->packSize == 0)
|
|
{
|
|
SizeT rem = outSize;
|
|
if (rem > p->unpackSize)
|
|
rem = p->unpackSize;
|
|
p->decoder.dicPos += rem;
|
|
p->unpackSize -= (UInt32)rem;
|
|
outSize -= rem;
|
|
if (p->unpackSize == 0)
|
|
p->state = LZMA2_STATE_CONTROL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
p->state = LZMA2_STATE_ERROR;
|
|
return (ELzma2ParseStatus)LZMA_STATUS_NOT_SPECIFIED;
|
|
}
|
|
|
|
|
|
|
|
|
|
SRes Lzma2Dec_DecodeToBuf(CLzma2Dec *p, Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
|
|
{
|
|
SizeT outSize = *destLen, inSize = *srcLen;
|
|
*srcLen = *destLen = 0;
|
|
|
|
for (;;)
|
|
{
|
|
SizeT inCur = inSize, outCur, dicPos;
|
|
ELzmaFinishMode curFinishMode;
|
|
SRes res;
|
|
|
|
if (p->decoder.dicPos == p->decoder.dicBufSize)
|
|
p->decoder.dicPos = 0;
|
|
dicPos = p->decoder.dicPos;
|
|
curFinishMode = LZMA_FINISH_ANY;
|
|
outCur = p->decoder.dicBufSize - dicPos;
|
|
|
|
if (outCur >= outSize)
|
|
{
|
|
outCur = outSize;
|
|
curFinishMode = finishMode;
|
|
}
|
|
|
|
res = Lzma2Dec_DecodeToDic(p, dicPos + outCur, src, &inCur, curFinishMode, status);
|
|
|
|
src += inCur;
|
|
inSize -= inCur;
|
|
*srcLen += inCur;
|
|
outCur = p->decoder.dicPos - dicPos;
|
|
memcpy(dest, p->decoder.dic + dicPos, outCur);
|
|
dest += outCur;
|
|
outSize -= outCur;
|
|
*destLen += outCur;
|
|
if (res != 0)
|
|
return res;
|
|
if (outCur == 0 || outSize == 0)
|
|
return SZ_OK;
|
|
}
|
|
}
|
|
|
|
|
|
SRes Lzma2Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
|
|
Byte prop, ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAllocPtr alloc)
|
|
{
|
|
CLzma2Dec p;
|
|
SRes res;
|
|
SizeT outSize = *destLen, inSize = *srcLen;
|
|
*destLen = *srcLen = 0;
|
|
*status = LZMA_STATUS_NOT_SPECIFIED;
|
|
Lzma2Dec_Construct(&p);
|
|
RINOK(Lzma2Dec_AllocateProbs(&p, prop, alloc));
|
|
p.decoder.dic = dest;
|
|
p.decoder.dicBufSize = outSize;
|
|
Lzma2Dec_Init(&p);
|
|
*srcLen = inSize;
|
|
res = Lzma2Dec_DecodeToDic(&p, outSize, src, srcLen, finishMode, status);
|
|
*destLen = p.decoder.dicPos;
|
|
if (res == SZ_OK && *status == LZMA_STATUS_NEEDS_MORE_INPUT)
|
|
res = SZ_ERROR_INPUT_EOF;
|
|
Lzma2Dec_FreeProbs(&p, alloc);
|
|
return res;
|
|
}
|