Update the 7z installer stub source to 18.05.

Tag #1022

1 files changed, 311 insertions, 0 deletions

diff --git a/other-licenses/7zstub/src/C/Bcj2Enc.c b/other-licenses/7zstub/src/C/Bcj2Enc.c
new file mode 100644
index 000000000..b0bc7593d
--- /dev/null
+++ b/other-licenses/7zstub/src/C/Bcj2Enc.c
@@ -0,0 +1,311 @@
+/* Bcj2Enc.c -- BCJ2 Encoder (Converter for x86 code)

+2017-04-28 : Igor Pavlov : Public domain */

+

+#include "Precomp.h"

+

+/* #define SHOW_STAT */

+

+#ifdef SHOW_STAT

+#include <stdio.h>

+#define PRF(x) x

+#else

+#define PRF(x)

+#endif

+

+#include <string.h>

+

+#include "Bcj2.h"

+#include "CpuArch.h"

+

+#define CProb UInt16

+

+#define kTopValue ((UInt32)1 << 24)

+#define kNumModelBits 11

+#define kBitModelTotal (1 << kNumModelBits)

+#define kNumMoveBits 5

+

+void Bcj2Enc_Init(CBcj2Enc *p)

+{

+  unsigned i;

+

+  p->state = BCJ2_ENC_STATE_OK;

+  p->finishMode = BCJ2_ENC_FINISH_MODE_CONTINUE;

+

+  p->prevByte = 0;

+

+  p->cache = 0;

+  p->range = 0xFFFFFFFF;

+  p->low = 0;

+  p->cacheSize = 1;

+

+  p->ip = 0;

+

+  p->fileIp = 0;

+  p->fileSize = 0;

+  p->relatLimit = BCJ2_RELAT_LIMIT;

+

+  p->tempPos = 0;

+

+  p->flushPos = 0;

+

+  for (i = 0; i < sizeof(p->probs) / sizeof(p->probs[0]); i++)

+    p->probs[i] = kBitModelTotal >> 1;

+}

+

+static Bool MY_FAST_CALL RangeEnc_ShiftLow(CBcj2Enc *p)

+{

+  if ((UInt32)p->low < (UInt32)0xFF000000 || (UInt32)(p->low >> 32) != 0)

+  {

+    Byte *buf = p->bufs[BCJ2_STREAM_RC];

+    do

+    {

+      if (buf == p->lims[BCJ2_STREAM_RC])

+      {

+        p->state = BCJ2_STREAM_RC;

+        p->bufs[BCJ2_STREAM_RC] = buf;

+        return True;

+      }

+      *buf++ = (Byte)(p->cache + (Byte)(p->low >> 32));

+      p->cache = 0xFF;

+    }

+    while (--p->cacheSize);

+    p->bufs[BCJ2_STREAM_RC] = buf;

+    p->cache = (Byte)((UInt32)p->low >> 24);

+  }

+  p->cacheSize++;

+  p->low = (UInt32)p->low << 8;

+  return False;

+}

+

+static void Bcj2Enc_Encode_2(CBcj2Enc *p)

+{

+  if (BCJ2_IS_32BIT_STREAM(p->state))

+  {

+    Byte *cur = p->bufs[p->state];

+    if (cur == p->lims[p->state])

+      return;

+    SetBe32(cur, p->tempTarget);

+    p->bufs[p->state] = cur + 4;

+  }

+

+  p->state = BCJ2_ENC_STATE_ORIG;

+

+  for (;;)

+  {

+    if (p->range < kTopValue)

+    {

+      if (RangeEnc_ShiftLow(p))

+        return;

+      p->range <<= 8;

+    }

+

+    {

+      {

+        const Byte *src = p->src;

+        const Byte *srcLim;

+        Byte *dest;

+        SizeT num = p->srcLim - src;

+

+        if (p->finishMode == BCJ2_ENC_FINISH_MODE_CONTINUE)

+        {

+          if (num <= 4)

+            return;

+          num -= 4;

+        }

+        else if (num == 0)

+          break;

+

+        dest = p->bufs[BCJ2_STREAM_MAIN];

+        if (num > (SizeT)(p->lims[BCJ2_STREAM_MAIN] - dest))

+        {

+          num = p->lims[BCJ2_STREAM_MAIN] - dest;

+          if (num == 0)

+          {

+            p->state = BCJ2_STREAM_MAIN;

+            return;

+          }

+        }

+       

+        srcLim = src + num;

+

+        if (p->prevByte == 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->src;

+        

+        if (src == srcLim)

+        {

+          p->prevByte = src[-1];

+          p->bufs[BCJ2_STREAM_MAIN] = dest;

+          p->src = src;

+          p->ip += (UInt32)num;

+          continue;

+        }

+ 

+        {

+          Byte context = (Byte)(num == 0 ? p->prevByte : src[-1]);

+          Bool needConvert;

+

+          p->bufs[BCJ2_STREAM_MAIN] = dest + 1;

+          p->ip += (UInt32)num + 1;

+          src++;

+          

+          needConvert = False;

+

+          if ((SizeT)(p->srcLim - src) >= 4)

+          {

+            UInt32 relatVal = GetUi32(src);

+            if ((p->fileSize == 0 || (UInt32)(p->ip + 4 + relatVal - p->fileIp) < p->fileSize)

+                && ((relatVal + p->relatLimit) >> 1) < p->relatLimit)

+              needConvert = True;

+          }

+

+          {

+            UInt32 bound;

+            unsigned ttt;

+            Byte b = src[-1];

+            CProb *prob = p->probs + (unsigned)(b == 0xE8 ? 2 + (unsigned)context : (b == 0xE9 ? 1 : 0));

+

+            ttt = *prob;

+            bound = (p->range >> kNumModelBits) * ttt;

+            

+            if (!needConvert)

+            {

+              p->range = bound;

+              *prob = (CProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));

+              p->src = src;

+              p->prevByte = b;

+              continue;

+            }

+            

+            p->low += bound;

+            p->range -= bound;

+            *prob = (CProb)(ttt - (ttt >> kNumMoveBits));

+

+            {

+              UInt32 relatVal = GetUi32(src);

+              UInt32 absVal;

+              p->ip += 4;

+              absVal = p->ip + relatVal;

+              p->prevByte = src[3];

+              src += 4;

+              p->src = src;

+              {

+                unsigned cj = (b == 0xE8) ? BCJ2_STREAM_CALL : BCJ2_STREAM_JUMP;

+                Byte *cur = p->bufs[cj];

+                if (cur == p->lims[cj])

+                {

+                  p->state = cj;

+                  p->tempTarget = absVal;

+                  return;

+                }

+                SetBe32(cur, absVal);

+                p->bufs[cj] = cur + 4;

+              }

+            }

+          }

+        }

+      }

+    }

+  }

+

+  if (p->finishMode != BCJ2_ENC_FINISH_MODE_END_STREAM)

+    return;

+

+  for (; p->flushPos < 5; p->flushPos++)

+    if (RangeEnc_ShiftLow(p))

+      return;

+  p->state = BCJ2_ENC_STATE_OK;

+}

+

+

+void Bcj2Enc_Encode(CBcj2Enc *p)

+{

+  PRF(printf("\n"));

+  PRF(printf("---- ip = %8d   tempPos = %8d   src = %8d\n", p->ip, p->tempPos, p->srcLim - p->src));

+

+  if (p->tempPos != 0)

+  {

+    unsigned extra = 0;

+   

+    for (;;)

+    {

+      const Byte *src = p->src;

+      const Byte *srcLim = p->srcLim;

+      unsigned finishMode = p->finishMode;

+      

+      p->src = p->temp;

+      p->srcLim = p->temp + p->tempPos;

+      if (src != srcLim)

+        p->finishMode = BCJ2_ENC_FINISH_MODE_CONTINUE;

+      

+      PRF(printf("     ip = %8d   tempPos = %8d   src = %8d\n", p->ip, p->tempPos, p->srcLim - p->src));

+

+      Bcj2Enc_Encode_2(p);

+      

+      {

+        unsigned num = (unsigned)(p->src - p->temp);

+        unsigned tempPos = p->tempPos - num;

+        unsigned i;

+        p->tempPos = tempPos;

+        for (i = 0; i < tempPos; i++)

+          p->temp[i] = p->temp[(size_t)i + num];

+      

+        p->src = src;

+        p->srcLim = srcLim;

+        p->finishMode = finishMode;

+        

+        if (p->state != BCJ2_ENC_STATE_ORIG || src == srcLim)

+          return;

+        

+        if (extra >= tempPos)

+        {

+          p->src = src - tempPos;

+          p->tempPos = 0;

+          break;

+        }

+        

+        p->temp[tempPos] = src[0];

+        p->tempPos = tempPos + 1;

+        p->src = src + 1;

+        extra++;

+      }

+    }

+  }

+

+  PRF(printf("++++ ip = %8d   tempPos = %8d   src = %8d\n", p->ip, p->tempPos, p->srcLim - p->src));

+

+  Bcj2Enc_Encode_2(p);

+  

+  if (p->state == BCJ2_ENC_STATE_ORIG)

+  {

+    const Byte *src = p->src;

+    unsigned rem = (unsigned)(p->srcLim - src);

+    unsigned i;

+    for (i = 0; i < rem; i++)

+      p->temp[i] = src[i];

+    p->tempPos = rem;

+    p->src = src + rem;

+  }

+}