mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-21 09:21:08 +00:00
137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
/* 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.
|
|
*
|
|
*/
|
|
|
|
#include "mohawk/installer_archive.h"
|
|
|
|
#include "common/dcl.h"
|
|
#include "common/debug.h"
|
|
|
|
namespace Mohawk {
|
|
|
|
InstallerArchive::InstallerArchive() : Common::Archive() {
|
|
_stream = 0;
|
|
}
|
|
|
|
InstallerArchive::~InstallerArchive() {
|
|
close();
|
|
}
|
|
|
|
bool InstallerArchive::open(const Common::String &filename) {
|
|
close();
|
|
|
|
_stream = SearchMan.createReadStreamForMember(filename);
|
|
|
|
if (!_stream)
|
|
return false;
|
|
|
|
// Check for the magic uint32
|
|
// No idea what it means, but it's how "file" recognizes them
|
|
if (_stream->readUint32BE() != 0x135D658C) {
|
|
close();
|
|
return false;
|
|
}
|
|
|
|
// Let's pull some relevant data from the header
|
|
_stream->seek(41);
|
|
uint32 directoryTableOffset = _stream->readUint32LE();
|
|
/* uint32 directoryTableSize = */ _stream->readUint32LE();
|
|
uint16 directoryCount = _stream->readUint16LE();
|
|
uint32 fileTableOffset = _stream->readUint32LE();
|
|
/* uint32 fileTableSize = */ _stream->readUint32LE();
|
|
|
|
// We need to have at least one directory in order for the archive to be valid
|
|
if (directoryCount == 0) {
|
|
close();
|
|
return false;
|
|
}
|
|
|
|
// TODO: Currently, we only support getting files from the first directory
|
|
// To that end, get the number of files from that entry
|
|
_stream->seek(directoryTableOffset);
|
|
uint16 fileCount = _stream->readUint16LE();
|
|
debug(2, "File count = %d", fileCount);
|
|
|
|
// Following the directory table is the file table with files stored recursively
|
|
// by directory. Since we're only using the first directory, we can just go
|
|
// right to that one.
|
|
_stream->seek(fileTableOffset);
|
|
|
|
for (uint16 i = 0; i < fileCount; i++) {
|
|
FileEntry entry;
|
|
|
|
_stream->skip(3); // Unknown
|
|
|
|
entry.uncompressedSize = _stream->readUint32LE();
|
|
entry.compressedSize = _stream->readUint32LE();
|
|
entry.offset = _stream->readUint32LE();
|
|
|
|
_stream->skip(14); // Unknown
|
|
|
|
byte nameLength = _stream->readByte();
|
|
Common::String name;
|
|
while (nameLength--)
|
|
name += _stream->readByte();
|
|
|
|
_stream->skip(13); // Unknown
|
|
|
|
_map[name] = entry;
|
|
|
|
debug(3, "Found file '%s' at 0x%08x (Comp: 0x%08x, Uncomp: 0x%08x)", name.c_str(),
|
|
entry.offset, entry.compressedSize, entry.uncompressedSize);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void InstallerArchive::close() {
|
|
delete _stream; _stream = 0;
|
|
_map.clear();
|
|
}
|
|
|
|
bool InstallerArchive::hasFile(const Common::String &name) const {
|
|
return _map.contains(name);
|
|
}
|
|
|
|
int InstallerArchive::listMembers(Common::ArchiveMemberList &list) const {
|
|
for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
|
|
list.push_back(getMember(it->_key));
|
|
|
|
return _map.size();
|
|
}
|
|
|
|
const Common::ArchiveMemberPtr InstallerArchive::getMember(const Common::String &name) const {
|
|
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
|
|
}
|
|
|
|
Common::SeekableReadStream *InstallerArchive::createReadStreamForMember(const Common::String &name) const {
|
|
if (!_stream || !_map.contains(name))
|
|
return 0;
|
|
|
|
const FileEntry &entry = _map[name];
|
|
|
|
// Seek to our offset and then send it off to the decompressor
|
|
_stream->seek(entry.offset);
|
|
return Common::decompressDCL(_stream, entry.compressedSize, entry.uncompressedSize);
|
|
}
|
|
|
|
} // End of namespace Mohawk
|