utils knot_dname_lf2wire: fix a lint warning

diff --git a/lib/utils.c b/lib/utils.c
index aabfb791da2731e18f0650cb5b1f481f5cb2b370..e6eaa053b02276281c2fe42650c6c9b3701acc80 100644 (file)
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -920,10 +920,10 @@ uint64_t kr_now()
        return uv_now(uv_default_loop());
 }
 
-int knot_dname_lf2wire(knot_dname_t *dst0, uint8_t len, const uint8_t *lf)
+int knot_dname_lf2wire(knot_dname_t * const dst, uint8_t len, const uint8_t *lf)
 {
-       knot_dname_t *dst = dst0;
-       bool ok = dst && (len == 0 || lf);
+       knot_dname_t *d = dst; /* moving "cursor" as we write it out */
+       bool ok = d && (len == 0 || lf);
        if (!ok) {
                assert(false);
                return kr_error(EINVAL);
@@ -948,15 +948,15 @@ int knot_dname_lf2wire(knot_dname_t *dst0, uint8_t len, const uint8_t *lf)
                if (label_len > 63 || label_len <= 0)
                        return kr_error(EILSEQ);
                /* write the label */
-               *dst = label_len;
-               ++dst;
-               memcpy(dst, lf + label_start, label_len);
-               dst += label_len;
+               *d = label_len;
+               ++d;
+               memcpy(d, lf + label_start, label_len);
+               d += label_len;
                /* next label */
                label_end = label_start - 1;
        }
 finish:
-       *dst = 0; /* the final zero */
-       ++dst;
-       return dst - dst0;
+       *d = 0; /* the final zero */
+       ++d;
+       return d - dst;
 }