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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/compression/installshieldv3_archive.h"
#include "common/compression/dcl.h"
#include "common/debug.h"
namespace Common {
InstallShieldV3::InstallShieldV3() : Common::Archive() {
_stream = nullptr;
}
InstallShieldV3::~InstallShieldV3() {
close();
}
bool InstallShieldV3::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();
Common::Array<Common::String> dirNames;
Common::Array<int> dirSizes;
// We need to have at least one directory in order for the archive to be valid
if (directoryCount == 0) {
close();
return false;
}
// Get the number of files from every directory
_stream->seek(directoryTableOffset);
for (uint32 i = 0; i < directoryCount; i++) {
uint16 fileCount = _stream->readUint16LE();
uint16 chunkSize = _stream->readUint16LE();
byte nameLength = _stream->readUint16LE();
Common::String name;
while (nameLength--)
name += _stream->readByte();
dirNames.push_back(name);
dirSizes.push_back(fileCount);
debug(2, "Directory = %s, file count = %d", name.c_str(), fileCount);
_stream->skip(chunkSize - name.size() - 6);
}
// Following the directory table is the file table with files stored recursively
// by directory
for (int i = 0; i < directoryCount; i++) {
for (int j = 0; j < dirSizes[i]; j++) {
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
if (!dirNames[i].empty())
name = dirNames[i] + "\\" + name;
_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 InstallShieldV3::close() {
delete _stream; _stream = nullptr;
_map.clear();
}
bool InstallShieldV3::hasFile(const Common::Path &path) const {
Common::String name = path.toString();
return _map.contains(name);
}
int InstallShieldV3::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 InstallShieldV3::getMember(const Common::Path &path) const {
Common::String name = path.toString();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *InstallShieldV3::createReadStreamForMember(const Common::Path &path) const {
Common::String name = path.toString();
// Make sure "/" is converted to "\"
while (name.contains("/"))
Common::replace(name, "/", "\\");
if (!_stream || !_map.contains(name))
return nullptr;
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 Common
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