1 files changed, 93 insertions, 0 deletions
diff --git a/intern/cycles/util/util_cache.cpp b/intern/cycles/util/util_cache.cpp
new file mode 100644
index 00000000000..49a0f62cae8
--- /dev/null
+++ b/intern/cycles/util/util_cache.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+
+#include "util_cache.h"
+#include "util_foreach.h"
+#include "util_md5.h"
+#include "util_path.h"
+#include "util_types.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* CacheData */
+
+CacheData::CacheData(const string& name_)
+{
+	name = name_;
+	f = NULL;
+}
+
+CacheData::~CacheData()
+{
+	if(f)
+		fclose(f);
+}
+
+/* Cache */
+
+Cache Cache::global;
+
+string Cache::data_filename(const CacheData& key)
+{
+	MD5Hash hash;
+
+	foreach(const CacheBuffer& buffer, key.buffers)
+		hash.append((uint8_t*)buffer.data, buffer.size);
+	
+	string fname = key.name + "_" + hash.get_hex();
+	return path_get("cache/" + fname);
+}
+
+void Cache::insert(const CacheData& key, const CacheData& value)
+{
+	string filename = data_filename(key);
+	FILE *f = fopen(filename.c_str(), "wb");
+
+	if(!f) {
+		fprintf(stderr, "Failed to open file %s for writing.\n", filename.c_str());
+		return;
+	}
+
+	foreach(const CacheBuffer& buffer, value.buffers) {
+		if(!fwrite(&buffer.size, sizeof(buffer.size), 1, f))
+			fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
+		if(!fwrite(buffer.data, buffer.size, 1, f))
+			fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
+	}
+	
+	fclose(f);
+}
+
+bool Cache::lookup(const CacheData& key, CacheData& value)
+{
+	string filename = data_filename(key);
+	FILE *f = fopen(filename.c_str(), "rb");
+
+	if(!f)
+		return false;
+	
+	value.name = key.name;
+	value.f = f;
+
+	return true;
+}
+
+CCL_NAMESPACE_END
+