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-rw-r--r--src/libs/7zip/win/C/Ppmd8Dec.c155
1 files changed, 0 insertions, 155 deletions
diff --git a/src/libs/7zip/win/C/Ppmd8Dec.c b/src/libs/7zip/win/C/Ppmd8Dec.c
deleted file mode 100644
index c54e02ab2..000000000
--- a/src/libs/7zip/win/C/Ppmd8Dec.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/* Ppmd8Dec.c -- PPMdI Decoder
-2010-04-16 : Igor Pavlov : Public domain
-This code is based on:
- PPMd var.I (2002): Dmitry Shkarin : Public domain
- Carryless rangecoder (1999): Dmitry Subbotin : Public domain */
-
-#include "Ppmd8.h"
-
-#define kTop (1 << 24)
-#define kBot (1 << 15)
-
-Bool Ppmd8_RangeDec_Init(CPpmd8 *p)
-{
- unsigned i;
- p->Low = 0;
- p->Range = 0xFFFFFFFF;
- p->Code = 0;
- for (i = 0; i < 4; i++)
- p->Code = (p->Code << 8) | p->Stream.In->Read(p->Stream.In);
- return (p->Code < 0xFFFFFFFF);
-}
-
-static UInt32 RangeDec_GetThreshold(CPpmd8 *p, UInt32 total)
-{
- return p->Code / (p->Range /= total);
-}
-
-static void RangeDec_Decode(CPpmd8 *p, UInt32 start, UInt32 size)
-{
- start *= p->Range;
- p->Low += start;
- p->Code -= start;
- p->Range *= size;
-
- while ((p->Low ^ (p->Low + p->Range)) < kTop ||
- (p->Range < kBot && ((p->Range = (0 - p->Low) & (kBot - 1)), 1)))
- {
- p->Code = (p->Code << 8) | p->Stream.In->Read(p->Stream.In);
- p->Range <<= 8;
- p->Low <<= 8;
- }
-}
-
-#define MASK(sym) ((signed char *)charMask)[sym]
-
-int Ppmd8_DecodeSymbol(CPpmd8 *p)
-{
- size_t charMask[256 / sizeof(size_t)];
- if (p->MinContext->NumStats != 0)
- {
- CPpmd_State *s = Ppmd8_GetStats(p, p->MinContext);
- unsigned i;
- UInt32 count, hiCnt;
- if ((count = RangeDec_GetThreshold(p, p->MinContext->SummFreq)) < (hiCnt = s->Freq))
- {
- Byte symbol;
- RangeDec_Decode(p, 0, s->Freq);
- p->FoundState = s;
- symbol = s->Symbol;
- Ppmd8_Update1_0(p);
- return symbol;
- }
- p->PrevSuccess = 0;
- i = p->MinContext->NumStats;
- do
- {
- if ((hiCnt += (++s)->Freq) > count)
- {
- Byte symbol;
- RangeDec_Decode(p, hiCnt - s->Freq, s->Freq);
- p->FoundState = s;
- symbol = s->Symbol;
- Ppmd8_Update1(p);
- return symbol;
- }
- }
- while (--i);
- if (count >= p->MinContext->SummFreq)
- return -2;
- RangeDec_Decode(p, hiCnt, p->MinContext->SummFreq - hiCnt);
- PPMD_SetAllBitsIn256Bytes(charMask);
- MASK(s->Symbol) = 0;
- i = p->MinContext->NumStats;
- do { MASK((--s)->Symbol) = 0; } while (--i);
- }
- else
- {
- UInt16 *prob = Ppmd8_GetBinSumm(p);
- if (((p->Code / (p->Range >>= 14)) < *prob))
- {
- Byte symbol;
- RangeDec_Decode(p, 0, *prob);
- *prob = (UInt16)PPMD_UPDATE_PROB_0(*prob);
- symbol = (p->FoundState = Ppmd8Context_OneState(p->MinContext))->Symbol;
- Ppmd8_UpdateBin(p);
- return symbol;
- }
- RangeDec_Decode(p, *prob, (1 << 14) - *prob);
- *prob = (UInt16)PPMD_UPDATE_PROB_1(*prob);
- p->InitEsc = PPMD8_kExpEscape[*prob >> 10];
- PPMD_SetAllBitsIn256Bytes(charMask);
- MASK(Ppmd8Context_OneState(p->MinContext)->Symbol) = 0;
- p->PrevSuccess = 0;
- }
- for (;;)
- {
- CPpmd_State *ps[256], *s;
- UInt32 freqSum, count, hiCnt;
- CPpmd_See *see;
- unsigned i, num, numMasked = p->MinContext->NumStats;
- do
- {
- p->OrderFall++;
- if (!p->MinContext->Suffix)
- return -1;
- p->MinContext = Ppmd8_GetContext(p, p->MinContext->Suffix);
- }
- while (p->MinContext->NumStats == numMasked);
- hiCnt = 0;
- s = Ppmd8_GetStats(p, p->MinContext);
- i = 0;
- num = p->MinContext->NumStats - numMasked;
- do
- {
- int k = (int)(MASK(s->Symbol));
- hiCnt += (s->Freq & k);
- ps[i] = s++;
- i -= k;
- }
- while (i != num);
-
- see = Ppmd8_MakeEscFreq(p, numMasked, &freqSum);
- freqSum += hiCnt;
- count = RangeDec_GetThreshold(p, freqSum);
-
- if (count < hiCnt)
- {
- Byte symbol;
- CPpmd_State **pps = ps;
- for (hiCnt = 0; (hiCnt += (*pps)->Freq) <= count; pps++);
- s = *pps;
- RangeDec_Decode(p, hiCnt - s->Freq, s->Freq);
- Ppmd_See_Update(see);
- p->FoundState = s;
- symbol = s->Symbol;
- Ppmd8_Update2(p);
- return symbol;
- }
- if (count >= freqSum)
- return -2;
- RangeDec_Decode(p, hiCnt, freqSum - hiCnt);
- see->Summ = (UInt16)(see->Summ + freqSum);
- do { MASK(ps[--i]->Symbol) = 0; } while (i != 0);
- }
-}