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engines/dragons/dragonobd.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/memstream.h"
+#include "dragons/dragonobd.h"
+#include "dragons/bigfile.h"
+
+namespace Dragons {
+
+DragonOBD::DragonOBD(BigfileArchive *bigfileArchive) {
+	uint32 size;
+	byte *optData = bigfileArchive->load("dragon.opt", size);
+	_optReadStream = new Common::MemoryReadStream(optData, size, DisposeAfterUse::YES);
+
+	byte *sptData = bigfileArchive->load("dragon.spt", size);
+	_sptReadStream = new Common::MemoryReadStream(sptData, size, DisposeAfterUse::YES);
+
+	_data = bigfileArchive->load("dragon.obd", _dataSize);
+}
+
+byte *DragonOBD::getObdAtOffset(uint32 offset) {
+	assert(_data);
+	assert(offset < _dataSize);
+	return &_data[offset];
+}
+
+DragonOBD::~DragonOBD() {
+	if (_data) {
+		delete _data;
+	}
+	delete _optReadStream;
+	delete _sptReadStream;
+}
+
+byte *DragonOBD::getFromOpt(uint32 index) {
+	_optReadStream->seek(index * 8);
+	return getObdAtOffset(_optReadStream->readUint32LE());
+}
+
+byte *DragonOBD::getFromSpt(uint32 index) {
+	_sptReadStream->seek(index * 4);
+	return getObdAtOffset(_sptReadStream->readUint32LE());
+}
+
+} // End of namespace Dragons