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7z working for SD

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dborth 2008-10-14 07:18:03 +00:00
parent ab3f20ab07
commit 79bcbc1b72
4 changed files with 71 additions and 115 deletions
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84
source/sz/7zDecode.c
View File

@ -126,7 +126,7 @@ SZ_RESULT SzDecode(const CFileSize *packSizes, const CFolder *folder,
if (state.Dictionary == 0)
{
allocMain->Free(state.Probs);
return SZE_OUTOFMEMORY;
return SZE_OUTOFMEMORYDIC;
}
}
LzmaDecoderInit(&state);
@ -244,20 +244,20 @@ SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
// allocate memory for the temporary buffer
Byte *tmpBuffer = (Byte *)allocMain->Alloc(_LZMA_TEMP_BUFFER_SIZE);
// variables containing the number of the first and the last bytes of the buffer
size_t bufferStart, bufferEnd;
bufferStart = bufferEnd = 0;
// integers contains the offset, the size and the already copied data which will be
// copied from the tmpBuffer to outBuffer
size_t copyOffset, copySize, copyDone;
copyOffset = copySize = copyDone = 0;
UInt32 i = 0;
// decompress data in _LZMA_TEMP_BUFFER_SIZE byte steps and copy the wanted file to outBuffer
size_t bytesLeft = *fileSize; // total bytes remaining to be read
size_t bytesToRead = 0; // bytes to read on this pass
size_t bytesRead = 0; // total bytes read
size_t offset = 0; // buffer offset
do
{
if(bytesLeft > _LZMA_TEMP_BUFFER_SIZE)
bytesToRead = _LZMA_TEMP_BUFFER_SIZE;
else
bytesToRead = bytesLeft;
bytesLeft -= bytesToRead;
// decompress next bytes
result = LzmaDecode(&state,
#ifdef _LZMA_IN_CB
@ -265,18 +265,14 @@ SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
#else
//inBuffer, (SizeT)inSize, &inProcessed, //TODO!
#endif
tmpBuffer, _LZMA_TEMP_BUFFER_SIZE, &outSizeProcessedLoc
tmpBuffer, bytesToRead, &outSizeProcessedLoc
);
// check result
if(result == LZMA_RESULT_DATA_ERROR)
{
return SZE_DATA_ERROR;
}
if(result != LZMA_RESULT_OK)
{
else if(result != LZMA_RESULT_OK)
return SZE_FAIL;
}
// normally this should never happen
if(outSizeProcessedLoc > _LZMA_TEMP_BUFFER_SIZE)
@ -284,53 +280,11 @@ SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
return SZE_FAIL;
}
// update bufferStart and bufferEnd
bufferStart = _LZMA_TEMP_BUFFER_SIZE * i;
bufferEnd = bufferStart + outSizeProcessedLoc;
i++;
// calculate copy offset and size
if(*fileOffset > bufferEnd)
{
// we haven't reached the start of the file yet
continue;
memcpy(outBuffer + offset, tmpBuffer, outSizeProcessedLoc);
bytesRead += bytesToRead;
offset += outSizeProcessedLoc;
}
// calculate offset
if(*fileOffset < bufferStart)
{
// the file has already started before this decompression step
copyOffset = 0;
}
else
{
// the file starts somewhere inside this buffer
copyDone = 0;
copyOffset = _LZMA_TEMP_BUFFER_SIZE - (bufferEnd - *fileOffset);
}
// calculate size
if((*fileOffset + *fileSize) > bufferEnd)
{
// we'll need the whole buffer after copyOffset
copySize = _LZMA_TEMP_BUFFER_SIZE - copyOffset;
}
else
{
// we'll stop somewhere inside the buffer
copySize = (*fileOffset + *fileSize) - (bufferStart + copyOffset);
}
// copy bytes to the real output buffer
if(copySize == 0)
{
continue;
}
// printf("memcpy(outBuffer + %d, tmpBuffer + %d, %d)\n", copyDone, copyOffset, copySize);
memcpy(outBuffer + copyDone, tmpBuffer + copyOffset, copySize);
copyDone += copySize;
}
while((*fileOffset + *fileSize) > bufferEnd);
while(bytesLeft > 0);
/* result = LzmaDecode(&state,
#ifdef _LZMA_IN_CB
@ -340,7 +294,7 @@ SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
#endif
outBuffer, (SizeT)outSize, &outSizeProcessedLoc);*/
//*outSizeProcessed = (size_t)outSizeProcessedLoc;
*outSizeProcessed = copyDone;
*outSizeProcessed = offset;
allocMain->Free(tmpBuffer); // free the temporary buffer again
allocMain->Free(state.Probs);
allocMain->Free(state.Dictionary);

2
source/sz/7zDecode.h
View File

@ -24,7 +24,7 @@ SZ_RESULT SzDecode(const CFileSize *packSizes, const CFolder *folder,
#ifdef _LZMA_OUT_READ
#ifndef _LZMA_TEMP_BUFFER_SIZE
#define _LZMA_TEMP_BUFFER_SIZE (1 << 15) // size of the temporary buffer in bytes
#define _LZMA_TEMP_BUFFER_SIZE (1024) // size of the temporary buffer in bytes
#endif
SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,

12
source/sz/7zExtract.c
View File

@ -232,15 +232,15 @@ SZ_RESULT SzExtract2(
for(i = db->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
*offset += (UInt32)db->Database.Files[i].Size;
*outSizeProcessed = (size_t)fileItem->Size;*/
CFileItem *fileItem = db->Database.Files + fileIndex;
//CFileItem *fileItem = db->Database.Files + fileIndex;
if (/**offset +*/ *outSizeProcessed > *outBufferSize)
return SZE_FAIL;
{
if (fileItem->IsFileCRCDefined)
{
if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer/* + *offset*/, *outSizeProcessed))
res = SZE_CRC_ERROR; // why does SzExtract return SZE_FAIL when we can return SZE_CRC_ERROR?
}
//if (fileItem->IsFileCRCDefined)
//{
// if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer/* + *offset*/, *outSizeProcessed))
// res = SZE_CRC_ERROR; // why does SzExtract return SZE_FAIL when we can return SZE_CRC_ERROR?
//}
}
}

2
source/sz/7zTypes.h
View File

@ -64,6 +64,8 @@ typedef UInt32 CFileSize;
#define SZE_ARCHIVE_ERROR (6)
#define SZE_OUTOFMEMORYDIC (7)
#define RINOK(x) { int __result_ = (x); if(__result_ != 0) return __result_; }
#endif