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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This file is based on WME Lite.
* http://dead-code.org/redir.php?target=wmelite
* Copyright (c) 2011 Jan Nedoma
*/
#include "engines/wintermute/dcgf.h"
#include "engines/wintermute/Base/BPackage.h"
#include "engines/wintermute/Base/file/BPkgFile.h"
#include "engines/wintermute/Base/BGame.h"
#include "engines/wintermute/Base/BFileManager.h"
#include "common/util.h"
#include "common/file.h"
#include "common/stream.h"
#include "common/substream.h"
#include "common/zlib.h"
namespace WinterMute {
// HACK: wrapCompressedStream might set the size to 0, so we need a way to override it.
class CBPkgFile : public Common::SeekableReadStream {
uint32 _size;
Common::SeekableReadStream *_stream;
public:
CBPkgFile(Common::SeekableReadStream *stream, uint32 knownLength) : _size(knownLength), _stream(stream) {}
virtual ~CBPkgFile() {
delete _stream;
}
virtual uint32 read(void *dataPtr, uint32 dataSize) {
return _stream->read(dataPtr, dataSize);
}
virtual bool eos() const {
return _stream->eos();
}
virtual int32 pos() const {
return _stream->pos();
}
virtual int32 size() const {
return _size;
}
virtual bool seek(int32 offset, int whence = SEEK_SET) {
return _stream->seek(offset, whence);
}
};
Common::SeekableReadStream *openPkgFile(const Common::String &filename, CBFileManager *fileManager) {
CBFileEntry *fileEntry;
Common::SeekableReadStream *file = NULL;
char fileName[MAX_PATH];
strcpy(fileName, filename.c_str());
// correct slashes
for (uint32 i = 0; i < strlen(fileName); i++) {
if (fileName[i] == '/') fileName[i] = '\\';
}
fileEntry = fileManager->getPackageEntry(fileName);
if (!fileEntry) return NULL;
file = fileEntry->_package->getFilePointer();
if (!file) return NULL;
// TODO: Cleanup
bool compressed = (fileEntry->_compressedLength != 0);
/* _size = fileEntry->_length; */
if (compressed) {
// TODO: Really, most of this logic might be doable directly in the fileEntry?
// But for now, this should get us rolling atleast.
file = Common::wrapCompressedReadStream(new Common::SeekableSubReadStream(file, fileEntry->_offset, fileEntry->_offset + fileEntry->_length, DisposeAfterUse::YES));
} else {
file = new Common::SeekableSubReadStream(file, fileEntry->_offset, fileEntry->_offset + fileEntry->_length, DisposeAfterUse::YES);
}
if (file->size() == 0) {
file = new CBPkgFile(file, fileEntry->_length);
}
file->seek(0);
return file;
}
} // end of namespace WinterMute
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