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engines/neverhood/nhcarchive.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/compression/dcl.h"
+#include "neverhood/nhcarchive.h"
+
+namespace Neverhood {
+
+bool NhcArchive::open(const Common::Path &filename, bool isOptional) {
+	_entries.clear();
+
+	if (!_fd.open(filename)) {
+		if (!isOptional)
+			error("NhcArchive::open() Could not open %s", filename.toString(Common::Path::kNativeSeparator).c_str());
+		return false;
+	}
+
+	uint32 id = _fd.readUint32BE();
+	if (id != MKTAG('N', 'H', 'C', 0))
+		return false;
+	/* version = */ _fd.readUint32LE();
+	/* totalSize = */ _fd.readUint32LE();
+	uint32 fileCount = _fd.readUint32LE();
+
+	debug(4, "%s: fileCount = %d", filename.toString(Common::Path::kNativeSeparator).c_str(), fileCount);
+
+	_entries.reserve(fileCount);
+
+	// Load file hashes
+	for (uint i = 0; i < fileCount; i++) {
+		NhcArchiveEntry entry;
+		entry.fileHash = _fd.readUint32LE();
+		entry.type = _fd.readUint32LE();
+		entry.offset = _fd.readUint32LE();
+		entry.size = _fd.readUint32LE();
+		_entries.push_back(entry);
+	}
+
+	return true;
+}
+
+void NhcArchive::load(uint index, byte *buffer, uint32 size) {
+	load(&_entries[index], buffer, size);
+}
+
+void NhcArchive::load(NhcArchiveEntry *entry, byte *buffer, uint32 size) {
+	Common::StackLock lock(_mutex);
+
+	_fd.seek(entry->offset);
+
+	if (size == 0)
+		size = entry->size;
+	_fd.read(buffer, size);
+}
+
+Common::SeekableReadStream *NhcArchive::createStream(uint index) {
+	return createStream(&_entries[index]);
+}
+
+Common::SeekableReadStream *NhcArchive::createStream(NhcArchiveEntry *entry) {
+	return new Common::SafeMutexedSeekableSubReadStream(&_fd, entry->offset, entry->offset + entry->size,
+		DisposeAfterUse::NO, _mutex);
+}
+
+} // End of namespace Neverhood