Cache textures by checksum

1 files changed, 44 insertions, 0 deletions

diff --git a/src/hex.h b/src/hex.h
new file mode 100644
index 000000000..1afb87597
--- /dev/null
+++ b/src/hex.h
@@ -0,0 +1,44 @@
+/*
+Minetest-c55
+Copyright (C) 2012 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+
+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.
+*/
+
+#ifndef HEX_HEADER
+#define HEX_HEADER
+
+#include <string>
+
+static const char hex_chars[] = "0123456789abcdef";
+
+static std::string hex_encode(const char *data, unsigned int data_size)
+{
+	std::string ret;
+	char buf2[3];
+	buf2[2] = '\0';
+
+	for(unsigned int i = 0; i < data_size; i++)
+	{
+		unsigned char c = (unsigned char) data[i];
+		buf2[0] = hex_chars[(c & 0xf0) >> 4];
+		buf2[1] = hex_chars[c & 0x0f];
+		ret.append(buf2);
+	}
+
+	return ret;
+}
+
+#endif