Move hex.h to util/

1 files changed, 62 insertions, 0 deletions

diff --git a/src/util/hex.h b/src/util/hex.h
new file mode 100644
index 000000000..6f00a79bf
--- /dev/null
+++ b/src/util/hex.h
@@ -0,0 +1,62 @@
+/*
+Minetest
+Copyright (C) 2013 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 Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser 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 inline 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;
+}
+
+static inline std::string hex_encode(const std::string &data)
+{
+    return hex_encode(data.c_str(), data.size());
+}
+
+static inline bool hex_digit_decode(char hexdigit, unsigned char &value)
+{
+	if(hexdigit >= '0' && hexdigit <= '9')
+		value = hexdigit - '0';
+	else if(hexdigit >= 'A' && hexdigit <= 'F')
+		value = hexdigit - 'A' + 10;
+	else if(hexdigit >= 'a' && hexdigit <= 'f')
+		value = hexdigit - 'a' + 10;
+	else
+		return false;
+	return true;
+}
+
+#endif