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77 lines
2.0 KiB
C++
Executable File
77 lines
2.0 KiB
C++
Executable File
// PPC.cpp
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#include "StdAfx.h"
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#include "PPC.h"
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#include "Windows/Defs.h"
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static HRESULT BC_PPC_B_Code(ISequentialInStream *inStream,
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ISequentialOutStream *outStream, const UINT64 *inSize, const UINT64 *outSize,
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ICompressProgressInfo *progress, BYTE *buffer, bool encoding)
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{
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UINT32 nowPos = 0;
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UINT64 nowPos64 = 0;
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UINT32 bufferPos = 0;
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while(true)
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{
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UINT32 processedSize;
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UINT32 size = kBufferSize - bufferPos;
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RINOK(inStream->Read(buffer + bufferPos, size, &processedSize));
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UINT32 endPos = bufferPos + processedSize;
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if (endPos < 4)
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{
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if (endPos > 0)
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{
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RINOK(outStream->Write(buffer, endPos, &processedSize));
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if (endPos != processedSize)
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return E_FAIL;
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}
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return S_OK;
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}
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for (bufferPos = 0; bufferPos <= endPos - 4; bufferPos += 4)
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{
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// PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link)
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if ((buffer[bufferPos] >> 2) == 0x12 &&
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(
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(buffer[bufferPos + 3] & 3) == 1
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// || (buffer[bufferPos+3] & 3) == 3
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)
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)
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{
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UINT32 src = ((buffer[bufferPos + 0] & 3) << 24) |
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(buffer[bufferPos + 1] << 16) |
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(buffer[bufferPos + 2] << 8) |
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(buffer[bufferPos + 3] & (~3));
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UINT32 dest;
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if (encoding)
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dest = nowPos + bufferPos + src;
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else
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dest = src - (nowPos + bufferPos);
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buffer[bufferPos + 0] = 0x48 | ((dest >> 24) & 0x3);
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buffer[bufferPos + 1] = (dest >> 16);
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buffer[bufferPos + 2] = (dest >> 8);
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buffer[bufferPos + 3] &= 0x3;
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buffer[bufferPos + 3] |= dest;
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}
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}
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nowPos += bufferPos;
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nowPos64 += bufferPos;
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RINOK(outStream->Write(buffer, bufferPos, &processedSize));
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if (bufferPos != processedSize)
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return E_FAIL;
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if (progress != NULL)
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{
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RINOK(progress->SetRatioInfo(&nowPos64, &nowPos64));
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}
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UINT32 i = 0;
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while(bufferPos < endPos)
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buffer[i++] = buffer[bufferPos++];
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bufferPos = i;
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}
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}
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MyClassImp(BC_PPC_B)
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