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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 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.
*
*/
// The following code is based on unshield
// Original copyright:
// Copyright (c) 2003 David Eriksson <twogood@users.sourceforge.net>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "agos/installshield_cab.h"
#include "common/debug.h"
#include "common/file.h"
#include "common/memstream.h"
#include "common/zlib.h"
namespace AGOS {
class InstallShieldCabinet : public Common::Archive {
Common::String _installShieldFilename;
public:
InstallShieldCabinet(const Common::String &filename);
~InstallShieldCabinet();
// Common::Archive API implementation
bool hasFile(const Common::String &name);
int listMembers(Common::ArchiveMemberList &list);
Common::ArchiveMemberPtr getMember(const Common::String &name);
Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
private:
struct FileEntry {
uint32 uncompressedSize;
uint32 compressedSize;
uint32 offset;
uint16 flags;
};
typedef Common::HashMap<Common::String, FileEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap;
FileMap _map;
};
InstallShieldCabinet::~InstallShieldCabinet() {
_map.clear();
}
InstallShieldCabinet::InstallShieldCabinet(const Common::String &filename) : _installShieldFilename(filename) {
Common::File installShieldFile;
if (!installShieldFile.open(_installShieldFilename)) {
warning("InstallShieldCabinet::InstallShieldCabinet(): Could not find the archive file %s", _installShieldFilename.c_str());
return;
}
// Note that we only support a limited subset of cabinet files
// Only single cabinet files and ones without data shared between
// cabinets.
// Check for the magic uint32
if (installShieldFile.readUint32LE() != 0x28635349) {
warning("InstallShieldCabinet::InstallShieldCabinet(): Magic ID doesn't match");
return;
}
uint32 version = installShieldFile.readUint32LE();
if (version != 0x01000004) {
warning("Unsupported CAB version %08x", version);
return;
}
/* uint32 volumeInfo = */ installShieldFile.readUint32LE();
uint32 cabDescriptorOffset = installShieldFile.readUint32LE();
/* uint32 cabDescriptorSize = */ installShieldFile.readUint32LE();
installShieldFile.seek(cabDescriptorOffset);
installShieldFile.skip(12);
uint32 fileTableOffset = installShieldFile.readUint32LE();
installShieldFile.skip(4);
uint32 fileTableSize = installShieldFile.readUint32LE();
uint32 fileTableSize2 = installShieldFile.readUint32LE();
uint32 directoryCount = installShieldFile.readUint32LE();
installShieldFile.skip(8);
uint32 fileCount = installShieldFile.readUint32LE();
if (fileTableSize != fileTableSize2)
warning("file table sizes do not match");
// We're ignoring file groups and components since we
// should not need them. Moving on to the files...
installShieldFile.seek(cabDescriptorOffset + fileTableOffset);
uint32 fileTableCount = directoryCount + fileCount;
uint32 *fileTableOffsets = new uint32[fileTableCount];
for (uint32 i = 0; i < fileTableCount; i++)
fileTableOffsets[i] = installShieldFile.readUint32LE();
for (uint32 i = directoryCount; i < fileCount + directoryCount; i++) {
installShieldFile.seek(cabDescriptorOffset + fileTableOffset + fileTableOffsets[i]);
uint32 nameOffset = installShieldFile.readUint32LE();
/* uint32 directoryIndex = */ installShieldFile.readUint32LE();
// First read in data needed by us to get at the file data
FileEntry entry;
entry.flags = installShieldFile.readUint16LE();
entry.uncompressedSize = installShieldFile.readUint32LE();
entry.compressedSize = installShieldFile.readUint32LE();
installShieldFile.skip(20);
entry.offset = installShieldFile.readUint32LE();
// Then let's get the string
installShieldFile.seek(cabDescriptorOffset + fileTableOffset + nameOffset);
Common::String fileName;
char c = installShieldFile.readByte();
while (c) {
fileName += c;
c = installShieldFile.readByte();
}
_map[fileName] = entry;
}
delete[] fileTableOffsets;
}
bool InstallShieldCabinet::hasFile(const Common::String &name) {
return _map.contains(name);
}
int InstallShieldCabinet::listMembers(Common::ArchiveMemberList &list) {
for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
list.push_back(getMember(it->_key));
return _map.size();
}
Common::ArchiveMemberPtr InstallShieldCabinet::getMember(const Common::String &name) {
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *InstallShieldCabinet::createReadStreamForMember(const Common::String &name) const {
if (!_map.contains(name))
return 0;
const FileEntry &entry = _map[name];
Common::File archiveFile;
archiveFile.open(_installShieldFilename);
archiveFile.seek(entry.offset);
if (!(entry.flags & 0x04)) {
// Not compressed
return archiveFile.readStream(entry.uncompressedSize);
}
#ifdef USE_ZLIB
byte *src = (byte *)malloc(entry.compressedSize);
byte *dst = (byte *)malloc(entry.uncompressedSize);
archiveFile.read(src, entry.compressedSize);
bool result = Common::inflateZlibHeaderless(dst, entry.uncompressedSize, src, entry.compressedSize);
free(src);
if (!result) {
warning("failed to inflate CAB file '%s'", name.c_str());
free(dst);
return 0;
}
return new Common::MemoryReadStream(dst, entry.uncompressedSize, DisposeAfterUse::YES);
#else
warning("zlib required to extract compressed CAB file '%s'", name.c_str());
return 0;
#endif
}
Common::Archive *makeInstallShieldArchive(const Common::String &name) {
return new InstallShieldCabinet(name);
}
} // End of namespace AGOS
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