1 files changed, 84 insertions, 0 deletions
diff --git a/engines/mohawk/resource_cache.cpp b/engines/mohawk/resource_cache.cpp
new file mode 100644
index 0000000000..20838ec1bd
--- /dev/null
+++ b/engines/mohawk/resource_cache.cpp
@@ -0,0 +1,84 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/debug.h"
+#include "mohawk/myst.h"
+#include "mohawk/resource_cache.h"
+
+namespace Mohawk {
+
+ResourceCache::ResourceCache() {
+	enabled = true;
+}
+
+ResourceCache::~ResourceCache() {
+	clear();
+}
+
+void ResourceCache::clear() {
+	if (!enabled) return;
+
+	debugC(kDebugCache, "Clearing Cache...");
+
+	// TODO : Not sure if need to explicitly delete dataObject.data element ie.
+	//        returned by readStream method here.
+	store.clear();
+}
+
+void ResourceCache::add(uint32 tag, uint16 id, Common::SeekableReadStream *data) {
+	if (!enabled) return;
+
+	debugC(kDebugCache, "Adding item %u - tag 0x%04X id %u", store.size(), tag, id);
+
+	dataObject current;
+	current.tag = tag;
+	current.id = id;
+	uint32 dataCurPos  = data->pos();
+	current.data = data->readStream(data->size());
+	data->seek(dataCurPos, SEEK_SET);
+	store.push_back(current);
+}
+
+// Returns NULL if not found
+Common::SeekableReadStream *ResourceCache::search(uint32 tag, uint16 id) {
+	if (!enabled) return NULL;
+
+	debugC(kDebugCache, "Searching for tag 0x%04X id %u", tag, id);
+
+	for (uint32 i = 0; i < store.size(); i++) {
+		if (tag == store[i].tag && id == store[i].id) {
+			debugC(kDebugCache, "Found cached tag 0x%04X id %u", tag, id);
+			uint32 dataCurPos  = store[i].data->pos();
+			Common::SeekableReadStream *ret = store[i].data->readStream(store[i].data->size());
+			store[i].data->seek(dataCurPos, SEEK_SET);
+			return ret;
+		}
+	}
+
+	debugC(kDebugCache, "tag 0x%04X id %u not found", tag, id);
+	return NULL;
+}
+
+} // End of namespace Mohawk