Initial commit

engines/tetraedge/obb_archive.cpp

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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/endian.h"
+#include "common/debug.h"
+#include "common/str.h"
+#include "common/file.h"
+#include "common/util.h"
+#include "common/substream.h"
+#include "common/compression/dcl.h"
+#include "tetraedge/obb_archive.h"
+
+namespace Tetraedge {
+
+bool ObbArchive::readFileMap(Common::SeekableReadStream &indexFile, FileMap &files) {
+	byte ver = indexFile.readByte();
+	if (ver != 1) {
+		warning("Unsupported tetraedge OBB version %d", ver);
+		return false;
+	}
+
+	uint32 filecnt = indexFile.readUint32LE();
+
+	for (uint i = 0; i < filecnt; i++) {
+		uint32 namelen = indexFile.readUint32LE();
+
+		if (namelen > 0x8000) {
+			warning("ObbArchive::readFileMap: Name too long: 0x%x",
+				namelen);
+			return false;
+		}
+
+		char *buf = (char *)malloc(namelen + 1);
+		assert(buf);
+		indexFile.read(buf, namelen);
+		buf[namelen] = 0;
+		uint32 offset = indexFile.readUint32LE();
+		uint32 sz = indexFile.readUint32LE();
+		if (offset > indexFile.size() || sz > indexFile.size()
+		    || offset + sz > indexFile.size()) {
+			warning("ObbArchive::readFileMap: File outside of container: 0x%x+0x%x > 0x%llx",
+				offset, sz, (unsigned long long) indexFile.size());
+			return false;
+		}
+		files[buf] = FileDescriptor(offset, sz);
+
+		free(buf);
+	}
+
+	return true;
+}
+
+ObbArchive* ObbArchive::open(const Common::Path& obbName) {
+	Common::File indexFile;
+	FileMap files;
+
+	if (!indexFile.open(obbName))
+		return nullptr;
+
+	if (!readFileMap(indexFile, files))
+		return nullptr;
+
+	return new ObbArchive(files, obbName);
+}
+
+bool ObbArchive::hasFile(const Common::Path &path) const {
+	return _files.contains(path.toString('/'));
+}
+
+int ObbArchive::listMembers(Common::ArchiveMemberList &list) const {
+	for (FileMap::const_iterator i = _files.begin(), end = _files.end(); i != end; ++i) {
+		list.push_back(Common::ArchiveMemberList::value_type(new Common::GenericArchiveMember(i->_key, *this)));
+	}
+
+	return _files.size();
+}
+
+const Common::ArchiveMemberPtr ObbArchive::getMember(const Common::Path &path) const {
+	FileMap::const_iterator i = _files.find(path.toString('/'));
+	if (i == _files.end())
+		return nullptr;
+
+	return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(i->_key, *this));
+}
+
+Common::SeekableReadStream *ObbArchive::createReadStreamForMember(const Common::Path &path) const {
+	Common::String translated = path.toString('/');
+	if (!_files.contains(translated))
+		return nullptr;
+	FileDescriptor desc = _files.getVal(translated);
+
+	Common::File *f = new Common::File();
+	if (!f->open(_obbName)) {
+		delete f;
+		return nullptr;
+	}
+
+	return new Common::SeekableSubReadStream(f, desc._fileOffset, desc._fileOffset + desc._fileSize, DisposeAfterUse::YES);
+}
+}