mirror of
https://github.com/libretro/scummvm.git
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213 lines
7.0 KiB
C++
213 lines
7.0 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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*
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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, 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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*/
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// The following code is based on unshield
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// Original copyright:
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// Copyright (c) 2003 David Eriksson <twogood@users.sourceforge.net>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "common/archive.h"
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#include "common/debug.h"
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#include "common/hash-str.h"
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#include "common/installshield_cab.h"
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#include "common/memstream.h"
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#include "common/zlib.h"
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namespace Common {
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class InstallShieldCabinet : public Archive {
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public:
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InstallShieldCabinet(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse);
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~InstallShieldCabinet();
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// Archive API implementation
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bool hasFile(const String &name) const;
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int listMembers(ArchiveMemberList &list) const;
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const ArchiveMemberPtr getMember(const String &name) const;
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SeekableReadStream *createReadStreamForMember(const String &name) const;
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private:
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struct FileEntry {
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uint32 uncompressedSize;
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uint32 compressedSize;
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uint32 offset;
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uint16 flags;
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};
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typedef HashMap<String, FileEntry, IgnoreCase_Hash, IgnoreCase_EqualTo> FileMap;
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FileMap _map;
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Common::SeekableReadStream *_stream;
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DisposeAfterUse::Flag _disposeAfterUse;
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};
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InstallShieldCabinet::~InstallShieldCabinet() {
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_map.clear();
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if (_disposeAfterUse == DisposeAfterUse::YES)
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delete _stream;
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}
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InstallShieldCabinet::InstallShieldCabinet(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse) : _stream(stream), _disposeAfterUse(disposeAfterUse) {
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// Note that we only support a limited subset of cabinet files
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// Only single cabinet files and ones without data shared between
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// cabinets.
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// Check for the magic uint32
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if (_stream->readUint32LE() != 0x28635349) {
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warning("InstallShieldCabinet::InstallShieldCabinet(): Magic ID doesn't match");
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return;
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}
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uint32 version = _stream->readUint32LE();
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if (version != 0x01000004) {
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warning("Unsupported CAB version %08x", version);
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return;
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}
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/* uint32 volumeInfo = */ _stream->readUint32LE();
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uint32 cabDescriptorOffset = _stream->readUint32LE();
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/* uint32 cabDescriptorSize = */ _stream->readUint32LE();
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_stream->seek(cabDescriptorOffset);
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_stream->skip(12);
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uint32 fileTableOffset = _stream->readUint32LE();
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_stream->skip(4);
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uint32 fileTableSize = _stream->readUint32LE();
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uint32 fileTableSize2 = _stream->readUint32LE();
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uint32 directoryCount = _stream->readUint32LE();
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_stream->skip(8);
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uint32 fileCount = _stream->readUint32LE();
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if (fileTableSize != fileTableSize2)
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warning("file table sizes do not match");
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// We're ignoring file groups and components since we
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// should not need them. Moving on to the files...
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_stream->seek(cabDescriptorOffset + fileTableOffset);
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uint32 fileTableCount = directoryCount + fileCount;
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uint32 *fileTableOffsets = new uint32[fileTableCount];
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for (uint32 i = 0; i < fileTableCount; i++)
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fileTableOffsets[i] = _stream->readUint32LE();
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for (uint32 i = directoryCount; i < fileCount + directoryCount; i++) {
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_stream->seek(cabDescriptorOffset + fileTableOffset + fileTableOffsets[i]);
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uint32 nameOffset = _stream->readUint32LE();
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/* uint32 directoryIndex = */ _stream->readUint32LE();
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// First read in data needed by us to get at the file data
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FileEntry entry;
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entry.flags = _stream->readUint16LE();
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entry.uncompressedSize = _stream->readUint32LE();
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entry.compressedSize = _stream->readUint32LE();
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_stream->skip(20);
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entry.offset = _stream->readUint32LE();
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// Then let's get the string
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_stream->seek(cabDescriptorOffset + fileTableOffset + nameOffset);
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String fileName;
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char c = _stream->readByte();
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while (c) {
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fileName += c;
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c = _stream->readByte();
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}
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_map[fileName] = entry;
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}
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delete[] fileTableOffsets;
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}
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bool InstallShieldCabinet::hasFile(const String &name) const {
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return _map.contains(name);
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}
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int InstallShieldCabinet::listMembers(ArchiveMemberList &list) const {
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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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const ArchiveMemberPtr InstallShieldCabinet::getMember(const String &name) const {
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return ArchiveMemberPtr(new GenericArchiveMember(name, this));
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}
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SeekableReadStream *InstallShieldCabinet::createReadStreamForMember(const String &name) const {
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if (!_map.contains(name))
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return 0;
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const FileEntry &entry = _map[name];
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_stream->seek(entry.offset);
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if (!(entry.flags & 0x04)) // Not compressed
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return _stream->readStream(entry.uncompressedSize);
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#ifdef USE_ZLIB
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byte *src = (byte *)malloc(entry.compressedSize);
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byte *dst = (byte *)malloc(entry.uncompressedSize);
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_stream->read(src, entry.compressedSize);
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bool result = inflateZlibInstallShield(dst, entry.uncompressedSize, src, entry.compressedSize);
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free(src);
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if (!result) {
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warning("failed to inflate CAB file '%s'", name.c_str());
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free(dst);
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return 0;
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}
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return new MemoryReadStream(dst, entry.uncompressedSize, DisposeAfterUse::YES);
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#else
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warning("zlib required to extract compressed CAB file '%s'", name.c_str());
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return 0;
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#endif
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}
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Archive *makeInstallShieldArchive(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse) {
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return new InstallShieldCabinet(stream, disposeAfterUse);
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}
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} // End of namespace AGOS
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