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123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "ResourceManager.h"
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namespace Cryo {
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ResourceManager::ResourceManager() {
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}
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ResourceManager::ResourceManager(const Common::String &datFileName) {
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LoadDatFile(datFileName);
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}
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ResourceManager::~ResourceManager() {
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}
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bool ResourceManager::LoadDatFile(const Common::String &datFileName) {
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if (_datFile.isOpen()) {
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_datFile.close();
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_files.clear();
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}
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assert(_datFile.open(datFileName));
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uint16 numFiles = _datFile.readUint16LE();
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for (uint16 i = 0; i < numFiles; i++) {
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DatFileEntry entry;
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_datFile.read(entry._name, sizeof(entry._name));
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entry._size = _datFile.readUint32LE();
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entry._offset = _datFile.readUint32LE();
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entry._flag = _datFile.readByte();
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_files.push_back(entry);
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}
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return true;
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}
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Common::SeekableReadStream *ResourceManager::GetFile(const Common::String &resName, unsigned int hintIndex) {
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// First, try raw disk file so we can support modding/patching
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if (Common::File::exists(resName)) {
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debug("Loading %s from disk", resName);
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Common::File *resource = new Common::File();
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resource->open(resName);
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return resource;
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}
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// Look inside .dat file
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if (_datFile.isOpen()) {
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for (unsigned int i = hintIndex; i < _files.size(); i++) {
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if (!resName.compareToIgnoreCase(_files[i]._name)) {
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debug("Loading %s from dat file", resName);
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Common::SeekableSubReadStream *resource = new Common::SeekableSubReadStream(&_datFile, _files[i]._offset, _files[i]._offset + _files[i]._size);
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return resource;
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}
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}
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}
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debug("Unable to load %s - does't exists", resName);
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return nullptr;
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}
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Common::SeekableReadStream *ResourceManager::GetFile(unsigned int resIndex) {
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if (_files.size() > resIndex) {
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return GetFile(Common::String(_files[resIndex]._name), resIndex);
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}
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return nullptr;
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}
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void *ResourceManager::StreamToBuffer(Common::SeekableReadStream *stream, unsigned int *size) {
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if (!stream)
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return nullptr;
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unsigned int readSize = stream->size();
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byte *data = new byte[readSize + 1];
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readSize = stream->read(data, readSize);
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if (size)
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*size = readSize;
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return data;
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}
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void *ResourceManager::GetData(const Common::String &resName, unsigned int *size) {
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Common::SeekableReadStream *resource = GetFile(resName);
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void *data = StreamToBuffer(resource, size);
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delete resource;
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return data;
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}
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void *ResourceManager::GetData(int resIndex, unsigned int *size) {
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Common::SeekableReadStream *resource = GetFile(resIndex);
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void *data = StreamToBuffer(resource, size);
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delete resource;
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return data;
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}
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}
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