From fa4a01e4a27dd4b3a57077acbd0e69f95d55944a Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sat, 16 Jul 2011 22:38:50 +0200
Subject: [PATCH] Use const pointer to source in base64 and hex routines.

---
 src/utils.c | 8 ++++----
 src/utils.h | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/utils.c b/src/utils.c
index ab426ab..022ac25 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -46,14 +46,14 @@ static int charb64decode(char c) {
 		return 63;
 }
 
-int hex2bin(char *src, char *dst, int length) {
+int hex2bin(const char *src, char *dst, int length) {
 	int i;
 	for(i = 0; i < length && src[i * 2] && src[i * 2 + 1]; i++)
 		dst[i] = charhex2bin(src[i * 2]) * 16 + charhex2bin(src[i * 2 + 1]);
 	return i;
 }
 
-int bin2hex(char *src, char *dst, int length) {
+int bin2hex(const char *src, char *dst, int length) {
 	int i;
 	for(i = length - 1; i >= 0; i--) {
 		dst[i * 2 + 1] = hexadecimals[(unsigned char) src[i] & 15];
@@ -63,7 +63,7 @@ int bin2hex(char *src, char *dst, int length) {
 	return length * 2;
 }
 
-int b64decode(char *src, char *dst, int length) {
+int b64decode(const char *src, char *dst, int length) {
 	int i;
 	uint32_t triplet = 0;
 	unsigned char *udst = dst;
@@ -90,7 +90,7 @@ int b64decode(char *src, char *dst, int length) {
 	}
 }
 
-int b64encode(char *src, char *dst, int length) {
+int b64encode(const char *src, char *dst, int length) {
 	uint32_t triplet;
 	const unsigned char *usrc = src;
 	int si = length / 3 * 3;
diff --git a/src/utils.h b/src/utils.h
index 648a607..67c94f3 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -21,11 +21,11 @@
 #ifndef __TINC_UTILS_H__
 #define __TINC_UTILS_H__
 
-extern int hex2bin(char *src, char *dst, int length);
-extern int bin2hex(char *src, char *dst, int length);
+extern int hex2bin(const char *src, char *dst, int length);
+extern int bin2hex(const char *src, char *dst, int length);
 
-extern int b64encode(char *src, char *dst, int length);
-extern int b64decode(char *src, char *dst, int length);
+extern int b64encode(const char *src, char *dst, int length);
+extern int b64decode(const char *src, char *dst, int length);
 
 #ifdef HAVE_MINGW
 extern const char *winerror(int);
-- 
2.25.1