clean up uh_urldecode, null-terminate string

[project/uhttpd.git] / utils.c

diff --git a/utils.c b/utils.c
index ec0b3aa..aabb430 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -99,31 +99,18 @@ int uh_urldecode(char *buf, int blen, const char *src, int slen)
 
        for (i = 0; (i < slen) && (len < blen); i++)
        {
-               if (src[i] == '%')
-               {
-                       if (((i+2) < slen) && isxdigit(src[i+1]) && isxdigit(src[i+2]))
-                       {
-                               buf[len++] = (char)(16 * hex(src[i+1]) + hex(src[i+2]));
-                               i += 2;
-                       }
-                       else
-                       {
-                               /* Encoding error: it's hard to think of a
-                               ** scenario in which returning an incorrect
-                               ** 'decoding' of the malformed string is
-                               ** preferable to signaling an error condition. */
-                               #if 0 /* WORSE_IS_BETTER */
-                                   buf[len++] = '%';
-                               #else
-                                   return -2;
-                               #endif
-                       }
-               }
-               else
-               {
+               if (src[i] != '%') {
                        buf[len++] = src[i];
+                       continue;
                }
+
+               if (i + 2 >= slen || !isxdigit(src[i + 1]) || !isxdigit(src[i + 2]))
+                       return -2;
+
+               buf[len++] = (char)(16 * hex(src[i+1]) + hex(src[i+2]));
+               i += 2;
        }
+       buf[len] = 0;
 
        return (i == slen) ? len : -1;
 }