3.13

7zip/Compress/Branch/ARM.cpp

@@ -0,0 +1,69 @@
+// ARM.cpp
+
+#include "StdAfx.h"
+#include "ARM.h"
+
+#include "Windows/Defs.h"
+
+static HRESULT BC_ARM_Code(ISequentialInStream *inStream,
+      ISequentialOutStream *outStream, const UINT64 *inSize, const UINT64 *outSize,
+      ICompressProgressInfo *progress, BYTE *buffer, bool encoding)
+{
+  UINT32 nowPos = 0;
+  UINT64 nowPos64 = 0;
+  UINT32 bufferPos = 0;
+  while(true)
+  {
+    UINT32 processedSize;
+    UINT32 size = kBufferSize - bufferPos;
+    RINOK(inStream->Read(buffer + bufferPos, size, &processedSize));
+    UINT32 endPos = bufferPos + processedSize;
+    if (endPos < 4)
+    {
+      if (endPos > 0)
+      {
+        RINOK(outStream->Write(buffer, endPos, &processedSize));
+        if (endPos != processedSize)
+          return E_FAIL;
+      }
+      return S_OK;
+    }
+    for (bufferPos = 0; bufferPos <= endPos - 4; bufferPos += 4)
+    {
+      if (buffer[bufferPos + 3] == 0xeb)
+      {
+        UINT32 src = 
+            (buffer[bufferPos + 2] << 16) |
+            (buffer[bufferPos + 1] << 8) |
+            (buffer[bufferPos + 0]);
+
+        src <<= 2;
+        UINT32 dest;
+        if (encoding)
+          dest = nowPos + bufferPos + 8 + src;
+        else
+          dest = src - (nowPos + bufferPos + 8);
+        dest >>= 2;
+        buffer[bufferPos + 2] = (dest >> 16);
+        buffer[bufferPos + 1] = (dest >> 8);
+        buffer[bufferPos + 0] = dest;
+      }
+    }
+    nowPos += bufferPos;
+    nowPos64 += bufferPos;
+    RINOK(outStream->Write(buffer, bufferPos, &processedSize));
+    if (bufferPos != processedSize)
+      return E_FAIL;
+    if (progress != NULL)
+    {
+      RINOK(progress->SetRatioInfo(&nowPos64, &nowPos64));
+    }
+
+    UINT32 i = 0;
+    while(bufferPos < endPos)
+      buffer[i++] = buffer[bufferPos++];
+    bufferPos = i;
+  }
+}
+
+MyClassImp(BC_ARM)