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