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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/memstream.h"
#include "ultima/ultima8/misc/debugger.h"
#include "ultima/ultima8/filesys/u8_save_file.h"
namespace Ultima {
namespace Ultima8 {
U8SaveFile::U8SaveFile(Common::SeekableReadStream *rs) : _rs(rs) {
_valid = isU8SaveFile(_rs);
if (_valid)
_valid = readMetadata();
}
U8SaveFile::~U8SaveFile() {
delete _rs;
}
//static
bool U8SaveFile::isU8SaveFile(Common::SeekableReadStream *rs) {
rs->seek(0);
char buf[24];
rs->read(buf, 23);
buf[23] = '\0';
return (strncmp(buf, "Ultima 8 SaveGame File.", 23) == 0);
}
bool U8SaveFile::readMetadata() {
_rs->seek(0x18);
uint16 count = _rs->readUint16LE();
for (unsigned int i = 0; i < count; ++i) {
uint32 namelen = _rs->readUint32LE();
char *name = new char[namelen];
_rs->read(name, namelen);
FileEntry fe;
fe._size = _rs->readUint32LE();
fe._offset = _rs->pos();
_map[Common::String(name)] = fe;
delete[] name;
_rs->skip(fe._size); // skip data
}
return true;
}
bool U8SaveFile::hasFile(const Common::Path &path) const {
return _map.contains(path.toString());
}
int U8SaveFile::listMembers(Common::ArchiveMemberList& list) const {
list.clear();
for (U8SaveFileMap::const_iterator it = _map.begin(); it != _map.end(); ++it) {
list.push_back(Common::ArchiveMemberPtr(new Common::GenericArchiveMember(it->_key, *this)));
}
return list.size();
}
const Common::ArchiveMemberPtr U8SaveFile::getMember(const Common::Path& path) const {
if (!hasFile(path))
return nullptr;
Common::String name = path.toString();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, *this));
}
Common::SeekableReadStream* U8SaveFile::createReadStreamForMember(const Common::Path& path) const {
if (!hasFile(path))
return nullptr;
const FileEntry &fe = _map[path.toString()];
uint8 *data = (uint8 *)malloc(fe._size);
_rs->seek(fe._offset);
_rs->read(data, fe._size);
return new Common::MemoryReadStream(data, fe._size, DisposeAfterUse::YES);
}
} // End of namespace Ultima8
} // End of namespace Ultima
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