Improve to_block4().

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@736 7dcaeef0-15fb-0310-b436-a5af3365683c

libssh/base64.c

@@ -170,21 +170,32 @@ error:
                              i = ptr - alphabet; \
                              SET_##letter(*block, i); \
                          } while(0)
-/* returns 0 if ok, -1 if not (ie invalid char into the stuff) */
-static int to_block4(unsigned long *block, char *source,int num){
+
+/* Returns 0 if ok, -1 if not (ie invalid char into the stuff) */
+static int to_block4(unsigned long *block, const char *source, int num) {
   char *ptr;
   unsigned int i;
+
   *block = 0;
-    if(num<1)
+  if (num < 1) {
     return 0;
-    BLOCK(A,0); /* 6 bits */
-    BLOCK(B,1); /* 12 */
-    if(num<2)
+  }
+
+  BLOCK(A, 0); /* 6 bit */
+  BLOCK(B,1); /* 12 bit */
+
+  if (num < 2) {
     return 0;
-    BLOCK(C,2); /* 18 */
-    if(num < 3)
+  }
+
+  BLOCK(C, 2); /* 18 bit */
+
+  if (num < 3) {
     return 0;
-    BLOCK(D,3); /* 24 */
+  }
+
+  BLOCK(D, 3); /* 24 bit */
+
   return 0;
 }