X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/534983d7352171526a6d43b112e0baaefdb1e3cd..50193c1e3eb7f904bdc4be84618b1b045539597b:/client/util.c

diff --git a/client/util.c b/client/util.c
index 2c02d119..d691eefc 100644
--- a/client/util.c
+++ b/client/util.c
@@ -1,5 +1,14 @@
-#include <stdio.h>
-#include <stdint.h>
+//-----------------------------------------------------------------------------
+// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// utilities
+//-----------------------------------------------------------------------------
+
+#include "util.h"
 
 void print_hex(const uint8_t * data, const size_t len)
 {
@@ -21,3 +30,22 @@ char * sprint_hex(const uint8_t * data, const size_t len) {
 
 	return buf;
 }
+
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
+{
+	while (len--) {
+		dest[len] = (uint8_t) n;
+		n >>= 8;
+	}
+}
+
+uint64_t bytes_to_num(uint8_t* src, size_t len)
+{
+	uint64_t num = 0;
+	while (len--)
+	{
+		num = (num << 8) | (*src);
+		src++;
+	}
+	return num;
+}