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/*
* lzma zlib simplified wrapper
*
* Copyright (c) 2005-2006 Oleg I. Vdovikin <oleg@cs.msu.su>
*
* This library is free software; you can redistribute
* it and/or modify it under the terms of the GNU Lesser
* General Public License as published by the Free Software
* Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to
* the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*/
/*
* default values for encoder/decoder used by wrapper
*/
#include <zlib.h>
#define ZLIB_LC 3
#define ZLIB_LP 0
#define ZLIB_PB 2
#ifdef WIN32
#include <initguid.h>
#else
#define INITGUID
#endif
#include "../../../Common/MyWindows.h"
#include "../LZMA/LZMADecoder.h"
#include "../LZMA/LZMAEncoder.h"
#define STG_E_SEEKERROR ((HRESULT)0x80030019L)
#define STG_E_MEDIUMFULL ((HRESULT)0x80030070L)
class CInMemoryStream:
public IInStream,
public IStreamGetSize,
public CMyUnknownImp
{
public:
CInMemoryStream(const Bytef *data, UInt64 size) :
m_data(data), m_size(size), m_offset(0) {}
virtual ~CInMemoryStream() {}
MY_UNKNOWN_IMP2(IInStream, IStreamGetSize)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize)
{
if (size > m_size - m_offset)
size = m_size - m_offset;
if (size) {
memcpy(data, m_data + m_offset, size);
}
m_offset += size;
if (processedSize)
*processedSize = size;
return S_OK;
}
STDMETHOD(ReadPart)(void *data, UInt32 size, UInt32 *processedSize)
{
return Read(data, size, processedSize);
}
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
{
UInt64 _offset;
if (seekOrigin == STREAM_SEEK_SET) _offset = offset;
else if (seekOrigin == STREAM_SEEK_CUR) _offset = m_offset + offset;
else if (seekOrigin == STREAM_SEEK_END) _offset = m_size;
else return STG_E_INVALIDFUNCTION;
if (_offset < 0 || _offset > m_size)
return STG_E_SEEKERROR;
m_offset = _offset;
if (newPosition)
*newPosition = m_offset;
return S_OK;
}
STDMETHOD(GetSize)(UInt64 *size)
{
*size = m_size;
return S_OK;
}
protected:
const Bytef *m_data;
UInt64 m_size;
UInt64 m_offset;
};
class COutMemoryStream:
public IOutStream,
public CMyUnknownImp
{
public:
COutMemoryStream(Bytef *data, UInt64 maxsize) :
m_data(data), m_size(0), m_maxsize(maxsize), m_offset(0) {}
virtual ~COutMemoryStream() {}
MY_UNKNOWN_IMP1(IOutStream)
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize)
{
if (size > m_maxsize - m_offset)
size = m_maxsize - m_offset;
if (size) {
memcpy(m_data + m_offset, data, size);
}
m_offset += size;
if (m_offset > m_size)
m_size = m_offset;
if (processedSize)
*processedSize = size;
return S_OK;
}
STDMETHOD(WritePart)(const void *data, UInt32 size, UInt32 *processedSize)
{
return Write(data, size, processedSize);
}
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
{
UInt64 _offset;
if (seekOrigin == STREAM_SEEK_SET) _offset = offset;
else if (seekOrigin == STREAM_SEEK_CUR) _offset = m_offset + offset;
else if (seekOrigin == STREAM_SEEK_END) _offset = m_size;
else return STG_E_INVALIDFUNCTION;
if (_offset < 0 || _offset > m_maxsize)
return STG_E_SEEKERROR;
m_offset = _offset;
if (newPosition)
*newPosition = m_offset;
return S_OK;
}
STDMETHOD(SetSize)(Int64 newSize)
{
if ((UInt64)newSize > m_maxsize)
return STG_E_MEDIUMFULL;
return S_OK;
}
protected:
Bytef *m_data;
UInt64 m_size;
UInt64 m_maxsize;
UInt64 m_offset;
};
ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen,
int level))
{
CInMemoryStream *inStreamSpec = new CInMemoryStream(source, sourceLen);
CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
COutMemoryStream *outStreamSpec = new COutMemoryStream(dest, *destLen);
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
NCompress::NLZMA::CEncoder *encoderSpec =
new NCompress::NLZMA::CEncoder;
CMyComPtr<ICompressCoder> encoder = encoderSpec;
PROPID propIDs[] =
{
NCoderPropID::kDictionarySize,
NCoderPropID::kPosStateBits,
NCoderPropID::kLitContextBits,
NCoderPropID::kLitPosBits,
NCoderPropID::kAlgorithm,
NCoderPropID::kNumFastBytes,
NCoderPropID::kMatchFinder,
NCoderPropID::kEndMarker
};
const int kNumProps = sizeof(propIDs) / sizeof(propIDs[0]);
PROPVARIANT properties[kNumProps];
for (int p = 0; p < 6; p++)
properties[p].vt = VT_UI4;
properties[0].ulVal = UInt32(1 << (level + 14));
properties[1].ulVal = UInt32(ZLIB_PB);
properties[2].ulVal = UInt32(ZLIB_LC); // for normal files
properties[3].ulVal = UInt32(ZLIB_LP); // for normal files
properties[4].ulVal = UInt32(2);
properties[5].ulVal = UInt32(128);
properties[6].vt = VT_BSTR;
properties[6].bstrVal = (BSTR)(const wchar_t *)L"BT4";
properties[7].vt = VT_BOOL;
properties[7].boolVal = VARIANT_TRUE;
if (encoderSpec->SetCoderProperties(propIDs, properties, kNumProps) != S_OK)
return Z_MEM_ERROR; // should not happen
HRESULT result = encoder->Code(inStream, outStream, 0, 0, 0);
if (result == E_OUTOFMEMORY)
{
return Z_MEM_ERROR;
}
else if (result != S_OK)
{
return Z_BUF_ERROR; // should not happen
}
UInt64 fileSize;
outStreamSpec->Seek(0, STREAM_SEEK_END, &fileSize);
*destLen = fileSize;
return Z_OK;
}
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen))
{
CInMemoryStream *inStreamSpec = new CInMemoryStream(source, sourceLen);
CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
COutMemoryStream *outStreamSpec = new COutMemoryStream(dest, *destLen);
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
NCompress::NLZMA::CDecoder *decoderSpec =
new NCompress::NLZMA::CDecoder;
CMyComPtr<ICompressCoder> decoder = decoderSpec;
if (decoderSpec->SetDecoderPropertiesRaw(ZLIB_LC,
ZLIB_LP, ZLIB_PB, (1 << 23)) != S_OK) return Z_DATA_ERROR;
UInt64 fileSize = *destLen;
if (decoder->Code(inStream, outStream, 0, &fileSize, 0) != S_OK)
{
return Z_DATA_ERROR;
}
outStreamSpec->Seek(0, STREAM_SEEK_END, &fileSize);
*destLen = fileSize;
return Z_OK;
}
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