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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 "dcgf.h"
#include "BPackage.h"
#include "BPkgFile.h"
#include "BGame.h"
#include "BFileManager.h"
#include "common/util.h"
#include "common/file.h"
#include "common/stream.h"
#include "common/substream.h"
#include "common/zlib.h"
namespace WinterMute {
//////////////////////////////////////////////////////////////////////////
CBPkgFile::CBPkgFile(CBGame *inGame): CBFile(inGame) {
_fileEntry = NULL;
_file = NULL;
_compressed = false;
}
//////////////////////////////////////////////////////////////////////////
CBPkgFile::~CBPkgFile() {
Close();
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Open(Common::String Filename) {
Close();
char fileName[MAX_PATH];
strcpy(fileName, Filename.c_str());
// correct slashes
for (int i = 0; i < strlen(fileName); i++) {
if (fileName[i] == '/') fileName[i] = '\\';
}
_fileEntry = Game->_fileManager->GetPackageEntry(fileName);
if (!_fileEntry) return E_FAIL;
_file = _fileEntry->_package->GetFilePointer();
if (!_file) return E_FAIL;
// TODO: Cleanup
_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 = 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);
}
SeekToPos(0);
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Close() {
if (_fileEntry) {
_fileEntry->_package->CloseFilePointer(_file);
_fileEntry = NULL;
}
_file = NULL;
// TODO: Do we really need to take care of our position and size at all (or could (Safe)SubStreams fix that for us?
_pos = 0;
_size = 0;
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Read(void *Buffer, uint32 Size) {
if (!_fileEntry) return E_FAIL;
HRESULT ret = S_OK;
if (_pos + Size > _size) {
Size = _size - _pos;
if (Size == 0) return E_FAIL;
}
ret = _file->read(Buffer, Size);
_pos += Size;
return ret;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Seek(uint32 Pos, TSeek Origin) {
if (!_fileEntry) return E_FAIL;
uint32 NewPos = 0;
switch (Origin) {
case SEEK_TO_BEGIN:
NewPos = Pos;
break;
case SEEK_TO_END:
NewPos = _size + Pos;
break;
case SEEK_TO_CURRENT:
NewPos = _pos + Pos;
break;
}
if (NewPos < 0 || NewPos > _size) return E_FAIL;
return SeekToPos(NewPos);
}
#define STREAM_BUFFER_SIZE 4096
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::SeekToPos(uint32 NewPos) {
HRESULT ret = S_OK;
// seek compressed stream to NewPos
_pos = NewPos;
return ret;
}
} // end of namespace WinterMute
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