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author Vas Crabb <vas@vastheman.com>2016-04-09 21:45:54 +1000
committer Vas Crabb <vas@vastheman.com>2016-04-09 21:52:08 +1000
commite925c494fe30adafb615c075f5eb692dd2b2effa (patch)
treeeed0b7ccadb049ed2dc8a72282c0235c4e94b6ae /3rdparty/lzma/C/Bcj2.c
parentb13e02f9751424dfc9ce6070676e2e318087a991 (diff)
Update LZMA SDK to 15.14
Diffstat (limited to '3rdparty/lzma/C/Bcj2.c')
-rw-r--r--3rdparty/lzma/C/Bcj2.c330
1 files changed, 227 insertions, 103 deletions
diff --git a/3rdparty/lzma/C/Bcj2.c b/3rdparty/lzma/C/Bcj2.c
index 20199ce5659..3c88e44fc1f 100644
--- a/3rdparty/lzma/C/Bcj2.c
+++ b/3rdparty/lzma/C/Bcj2.c
@@ -1,132 +1,256 @@
-/* Bcj2.c -- Converter for x86 code (BCJ2)
-2008-10-04 : Igor Pavlov : Public domain */
+/* Bcj2.c -- BCJ2 Decoder (Converter for x86 code)
+2015-08-01 : Igor Pavlov : Public domain */
+
+#include "Precomp.h"
#include "Bcj2.h"
+#include "CpuArch.h"
-#ifdef _LZMA_PROB32
-#define CProb UInt32
-#else
#define CProb UInt16
-#endif
-
-#define IsJcc(b0, b1) ((b0) == 0x0F && ((b1) & 0xF0) == 0x80)
-#define IsJ(b0, b1) ((b1 & 0xFE) == 0xE8 || IsJcc(b0, b1))
-
-#define kNumTopBits 24
-#define kTopValue ((UInt32)1 << kNumTopBits)
-#define kNumBitModelTotalBits 11
-#define kBitModelTotal (1 << kNumBitModelTotalBits)
+#define kTopValue ((UInt32)1 << 24)
+#define kNumModelBits 11
+#define kBitModelTotal (1 << kNumModelBits)
#define kNumMoveBits 5
-#define RC_READ_BYTE (*buffer++)
-#define RC_TEST { if (buffer == bufferLim) return SZ_ERROR_DATA; }
-#define RC_INIT2 code = 0; range = 0xFFFFFFFF; \
- { int i; for (i = 0; i < 5; i++) { RC_TEST; code = (code << 8) | RC_READ_BYTE; }}
+#define _IF_BIT_0 ttt = *prob; bound = (p->range >> kNumModelBits) * ttt; if (p->code < bound)
+#define _UPDATE_0 p->range = bound; *prob = (CProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));
+#define _UPDATE_1 p->range -= bound; p->code -= bound; *prob = (CProb)(ttt - (ttt >> kNumMoveBits));
-#define NORMALIZE if (range < kTopValue) { RC_TEST; range <<= 8; code = (code << 8) | RC_READ_BYTE; }
-
-#define IF_BIT_0(p) ttt = *(p); bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
-#define UPDATE_0(p) range = bound; *(p) = (CProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits)); NORMALIZE;
-#define UPDATE_1(p) range -= bound; code -= bound; *(p) = (CProb)(ttt - (ttt >> kNumMoveBits)); NORMALIZE;
-
-int Bcj2_Decode(
- const Byte *buf0, SizeT size0,
- const Byte *buf1, SizeT size1,
- const Byte *buf2, SizeT size2,
- const Byte *buf3, SizeT size3,
- Byte *outBuf, SizeT outSize)
+void Bcj2Dec_Init(CBcj2Dec *p)
{
- CProb p[256 + 2];
- SizeT inPos = 0, outPos = 0;
-
- const Byte *buffer, *bufferLim;
- UInt32 range, code;
- Byte prevByte = 0;
+ unsigned i;
- unsigned int i;
- for (i = 0; i < sizeof(p) / sizeof(p[0]); i++)
- p[i] = kBitModelTotal >> 1;
-
- buffer = buf3;
- bufferLim = buffer + size3;
- RC_INIT2
+ p->state = BCJ2_DEC_STATE_OK;
+ p->ip = 0;
+ p->temp[3] = 0;
+ p->range = 0;
+ p->code = 0;
+ for (i = 0; i < sizeof(p->probs) / sizeof(p->probs[0]); i++)
+ p->probs[i] = kBitModelTotal >> 1;
+}
- if (outSize == 0)
- return SZ_OK;
+SRes Bcj2Dec_Decode(CBcj2Dec *p)
+{
+ if (p->range <= 5)
+ {
+ p->state = BCJ2_DEC_STATE_OK;
+ for (; p->range != 5; p->range++)
+ {
+ if (p->range == 1 && p->code != 0)
+ return SZ_ERROR_DATA;
+
+ if (p->bufs[BCJ2_STREAM_RC] == p->lims[BCJ2_STREAM_RC])
+ {
+ p->state = BCJ2_STREAM_RC;
+ return SZ_OK;
+ }
- for (;;)
+ p->code = (p->code << 8) | *(p->bufs[BCJ2_STREAM_RC])++;
+ }
+
+ if (p->code == 0xFFFFFFFF)
+ return SZ_ERROR_DATA;
+
+ p->range = 0xFFFFFFFF;
+ }
+ else if (p->state >= BCJ2_DEC_STATE_ORIG_0)
{
- Byte b;
- CProb *prob;
- UInt32 bound;
- UInt32 ttt;
-
- SizeT limit = size0 - inPos;
- if (outSize - outPos < limit)
- limit = outSize - outPos;
- while (limit != 0)
+ while (p->state <= BCJ2_DEC_STATE_ORIG_3)
{
- Byte b = buf0[inPos];
- outBuf[outPos++] = b;
- if (IsJ(prevByte, b))
- break;
- inPos++;
- prevByte = b;
- limit--;
+ Byte *dest = p->dest;
+ if (dest == p->destLim)
+ return SZ_OK;
+ *dest = p->temp[p->state++ - BCJ2_DEC_STATE_ORIG_0];
+ p->dest = dest + 1;
}
+ }
- if (limit == 0 || outPos == outSize)
- break;
-
- b = buf0[inPos++];
-
- if (b == 0xE8)
- prob = p + prevByte;
- else if (b == 0xE9)
- prob = p + 256;
- else
- prob = p + 257;
-
- IF_BIT_0(prob)
+ /*
+ if (BCJ2_IS_32BIT_STREAM(p->state))
+ {
+ const Byte *cur = p->bufs[p->state];
+ if (cur == p->lims[p->state])
+ return SZ_OK;
+ p->bufs[p->state] = cur + 4;
+
{
- UPDATE_0(prob)
- prevByte = b;
+ UInt32 val;
+ Byte *dest;
+ SizeT rem;
+
+ p->ip += 4;
+ val = GetBe32(cur) - p->ip;
+ dest = p->dest;
+ rem = p->destLim - dest;
+ if (rem < 4)
+ {
+ SizeT i;
+ SetUi32(p->temp, val);
+ for (i = 0; i < rem; i++)
+ dest[i] = p->temp[i];
+ p->dest = dest + rem;
+ p->state = BCJ2_DEC_STATE_ORIG_0 + (unsigned)rem;
+ return SZ_OK;
+ }
+ SetUi32(dest, val);
+ p->temp[3] = (Byte)(val >> 24);
+ p->dest = dest + 4;
+ p->state = BCJ2_DEC_STATE_OK;
}
+ }
+ */
+
+ for (;;)
+ {
+ if (BCJ2_IS_32BIT_STREAM(p->state))
+ p->state = BCJ2_DEC_STATE_OK;
else
{
- UInt32 dest;
- const Byte *v;
- UPDATE_1(prob)
- if (b == 0xE8)
+ if (p->range < kTopValue)
{
- v = buf1;
- if (size1 < 4)
- return SZ_ERROR_DATA;
- buf1 += 4;
- size1 -= 4;
+ if (p->bufs[BCJ2_STREAM_RC] == p->lims[BCJ2_STREAM_RC])
+ {
+ p->state = BCJ2_STREAM_RC;
+ return SZ_OK;
+ }
+ p->range <<= 8;
+ p->code = (p->code << 8) | *(p->bufs[BCJ2_STREAM_RC])++;
}
- else
+
{
- v = buf2;
- if (size2 < 4)
- return SZ_ERROR_DATA;
- buf2 += 4;
- size2 -= 4;
+ const Byte *src = p->bufs[BCJ2_STREAM_MAIN];
+ const Byte *srcLim;
+ Byte *dest;
+ SizeT num = p->lims[BCJ2_STREAM_MAIN] - src;
+
+ if (num == 0)
+ {
+ p->state = BCJ2_STREAM_MAIN;
+ return SZ_OK;
+ }
+
+ dest = p->dest;
+ if (num > (SizeT)(p->destLim - dest))
+ {
+ num = p->destLim - dest;
+ if (num == 0)
+ {
+ p->state = BCJ2_DEC_STATE_ORIG;
+ return SZ_OK;
+ }
+ }
+
+ srcLim = src + num;
+
+ if (p->temp[3] == 0x0F && (src[0] & 0xF0) == 0x80)
+ *dest = src[0];
+ else for (;;)
+ {
+ Byte b = *src;
+ *dest = b;
+ if (b != 0x0F)
+ {
+ if ((b & 0xFE) == 0xE8)
+ break;
+ dest++;
+ if (++src != srcLim)
+ continue;
+ break;
+ }
+ dest++;
+ if (++src == srcLim)
+ break;
+ if ((*src & 0xF0) != 0x80)
+ continue;
+ *dest = *src;
+ break;
+ }
+
+ num = src - p->bufs[BCJ2_STREAM_MAIN];
+
+ if (src == srcLim)
+ {
+ p->temp[3] = src[-1];
+ p->bufs[BCJ2_STREAM_MAIN] = src;
+ p->ip += (UInt32)num;
+ p->dest += num;
+ p->state =
+ p->bufs[BCJ2_STREAM_MAIN] ==
+ p->lims[BCJ2_STREAM_MAIN] ?
+ (unsigned)BCJ2_STREAM_MAIN :
+ (unsigned)BCJ2_DEC_STATE_ORIG;
+ return SZ_OK;
+ }
+
+ {
+ UInt32 bound, ttt;
+ CProb *prob;
+ Byte b = src[0];
+ Byte prev = (Byte)(num == 0 ? p->temp[3] : src[-1]);
+
+ p->temp[3] = b;
+ p->bufs[BCJ2_STREAM_MAIN] = src + 1;
+ num++;
+ p->ip += (UInt32)num;
+ p->dest += num;
+
+ prob = p->probs + (unsigned)(b == 0xE8 ? 2 + (unsigned)prev : (b == 0xE9 ? 1 : 0));
+
+ _IF_BIT_0
+ {
+ _UPDATE_0
+ continue;
+ }
+ _UPDATE_1
+
+ }
}
- dest = (((UInt32)v[0] << 24) | ((UInt32)v[1] << 16) |
- ((UInt32)v[2] << 8) | ((UInt32)v[3])) - ((UInt32)outPos + 4);
- outBuf[outPos++] = (Byte)dest;
- if (outPos == outSize)
- break;
- outBuf[outPos++] = (Byte)(dest >> 8);
- if (outPos == outSize)
+ }
+
+ {
+ UInt32 val;
+ unsigned cj = (p->temp[3] == 0xE8) ? BCJ2_STREAM_CALL : BCJ2_STREAM_JUMP;
+ const Byte *cur = p->bufs[cj];
+ Byte *dest;
+ SizeT rem;
+
+ if (cur == p->lims[cj])
+ {
+ p->state = cj;
break;
- outBuf[outPos++] = (Byte)(dest >> 16);
- if (outPos == outSize)
+ }
+
+ val = GetBe32(cur);
+ p->bufs[cj] = cur + 4;
+
+ p->ip += 4;
+ val -= p->ip;
+ dest = p->dest;
+ rem = p->destLim - dest;
+
+ if (rem < 4)
+ {
+ SizeT i;
+ SetUi32(p->temp, val);
+ for (i = 0; i < rem; i++)
+ dest[i] = p->temp[i];
+ p->dest = dest + rem;
+ p->state = BCJ2_DEC_STATE_ORIG_0 + (unsigned)rem;
break;
- outBuf[outPos++] = prevByte = (Byte)(dest >> 24);
+ }
+
+ SetUi32(dest, val);
+ p->temp[3] = (Byte)(val >> 24);
+ p->dest = dest + 4;
}
}
- return (outPos == outSize) ? SZ_OK : SZ_ERROR_DATA;
+
+ if (p->range < kTopValue && p->bufs[BCJ2_STREAM_RC] != p->lims[BCJ2_STREAM_RC])
+ {
+ p->range <<= 8;
+ p->code = (p->code << 8) | *(p->bufs[BCJ2_STREAM_RC])++;
+ }
+
+ return SZ_OK;
}