mirror of
https://github.com/libretro/scummvm.git
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126 lines
3.3 KiB
C++
126 lines
3.3 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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* 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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* 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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* $URL$
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* $Id$
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*
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*/
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#include "mohawk/installer_archive.h"
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#include "common/dcl.h"
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#include "common/debug.h"
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#include "common/substream.h"
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#include "common/util.h"
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namespace Mohawk {
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InstallerArchive::InstallerArchive() : Common::Archive() {
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_stream = 0;
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}
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InstallerArchive::~InstallerArchive() {
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close();
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}
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bool InstallerArchive::open(const Common::String &filename) {
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close();
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_stream = SearchMan.createReadStreamForMember(filename);
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if (!_stream)
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return false;
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// Check for the magic uint32
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// No idea what it means, but it's how "file" recognizes them
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if (_stream->readUint32BE() != 0x135D658C) {
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close();
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return false;
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}
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// Let's move to the directory
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_stream->seek(41);
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uint32 offset = _stream->readUint32LE();
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_stream->seek(offset);
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// Now read in each file from the directory
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uint16 fileCount = _stream->readUint16LE();
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debug(2, "File count = %d", fileCount);
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for (uint16 i = 0; i < fileCount; i++) {
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FileEntry entry;
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_stream->skip(12); // Unknown
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entry.uncompressedSize = _stream->readUint32LE();
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entry.compressedSize = _stream->readUint32LE();
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entry.offset = _stream->readUint32LE();
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_stream->skip(14); // Unknown
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byte nameLength = _stream->readByte();
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Common::String name;
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while (nameLength--)
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name += _stream->readByte();
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_stream->skip(4); // Unknown
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_map[name] = entry;
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debug(3, "Found file '%s' at 0x%08x (Comp: 0x%08x, Uncomp: 0x%08x)", name.c_str(),
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entry.offset, entry.compressedSize, entry.uncompressedSize);
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}
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return true;
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}
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void InstallerArchive::close() {
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delete _stream; _stream = 0;
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_map.clear();
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}
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bool InstallerArchive::hasFile(const Common::String &name) {
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return _map.contains(name);
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}
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int InstallerArchive::listMembers(Common::ArchiveMemberList &list) {
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for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
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list.push_back(getMember(it->_key));
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return _map.size();
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}
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Common::ArchiveMemberPtr InstallerArchive::getMember(const Common::String &name) {
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return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
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}
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Common::SeekableReadStream *InstallerArchive::createReadStreamForMember(const Common::String &name) const {
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if (!_stream || !_map.contains(name))
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return 0;
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const FileEntry &entry = _map[name];
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// Seek to our offset and then send it off to the decompressor
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_stream->seek(entry.offset);
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return Common::decompressDCL(_stream, entry.compressedSize, entry.uncompressedSize);
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}
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} // End of namespace Mohawk
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