Use restrict on pointers where it makes sense. (requires C99 support,

which we already assume)

src/hex.c

@@ -8,7 +8,7 @@
 static const char hx_chars[] = "0123456789ABCDEF" ;
 
 char*
-uc_hex_encode(const uint8_t *in, size_t len, char *out)
+uc_hex_encode(const uint8_t *restrict in, size_t len, char *restrict out)
 {
     unsigned int i, t;
 
@@ -28,7 +28,7 @@ uc_hex_encode(const uint8_t *in, size_t len, char *out)
 }
 
 char*
-uc_hex_encode_delim(const uint8_t *in, size_t inlen, char *out, int outlen, const char *delim)
+uc_hex_encode_delim(const uint8_t *restrict in, size_t inlen, char *restrict out, int outlen, const char *restrict delim)
 {
     size_t i;
     char *outp = out;
@@ -76,7 +76,7 @@ static inline int char_to_bin(char c)
 }
 
 uint8_t*
-uc_hex_decode(const char *in, size_t maxlen,uint8_t *out)
+uc_hex_decode(const char *restrict in, size_t maxlen,uint8_t *restrict out)
 {
     size_t i, t;