Initial commit

engines/ultima/ultima8/filesys/raw_archive.cpp

@@ -0,0 +1,101 @@
+/* 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 "ultima/ultima8/misc/debugger.h"
+#include "ultima/ultima8/filesys/raw_archive.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+RawArchive::~RawArchive() {
+	Archive::uncache();
+}
+
+void RawArchive::cache(uint32 index) {
+	if (index >= _count) return;
+	if (_objects.empty()) _objects.resize(_count);
+
+	if (_objects[index]) return;
+
+	_objects[index] = getRawObject(index);
+}
+
+void RawArchive::uncache(uint32 index) {
+	if (index >= _count) return;
+	if (_objects.empty()) return;
+
+	if (_objects[index]) {
+		delete[] _objects[index];
+		_objects[index] = nullptr;
+	}
+}
+
+bool RawArchive::isCached(uint32 index) const {
+	if (index >= _count) return false;
+	if (_objects.empty()) return false;
+
+	return (_objects[index] != nullptr);
+}
+
+const uint8 *RawArchive::get_object_nodel(uint32 index) {
+	if (index >= _count)
+		return nullptr;
+	cache(index);
+	return _objects[index];
+}
+
+uint8 *RawArchive::get_object(uint32 index) {
+	if (index >= _count)
+		return nullptr;
+
+	if (index < _objects.size() && _objects[index]) {
+		// already cached
+		uint32 size = getRawSize(index);
+		if (size == 0)
+			return nullptr;
+		uint8 *object = new uint8[size];
+		memcpy(object, _objects[index], size);
+		return object;
+	}
+
+	return getRawObject(index);
+}
+
+uint32 RawArchive::get_size(uint32 index) const {
+	if (index >= _count)
+		return 0;
+	return getRawSize(index);
+}
+
+Common::SeekableReadStream *RawArchive::get_datasource(uint32 index) {
+	if (index >= _count)
+		return nullptr;
+	cache(index);
+
+	if (!_objects[index])
+		return nullptr;
+
+	return new Common::MemoryReadStream(_objects[index], getRawSize(index));
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima