udhcp: trivial shrink

function                                             old     new   delta
dname_dec                                            337     332      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/networking/udhcp/domain_codec.c b/networking/udhcp/domain_codec.c
index c1325d8be..05cdf51e9 100644
--- a/networking/udhcp/domain_codec.c
+++ b/networking/udhcp/domain_codec.c
@@ -42,7 +42,7 @@ char* FAST_FUNC dname_dec(const uint8_t *cstr, int clen, const char *pre)
          */
         while (1) {
                 /* note: "return NULL" below are leak-safe since
-                 * dst isn't yet allocated */
+                 * dst isn't allocated yet */
                 const uint8_t *c;
                 unsigned crtpos, retpos, depth, len;
 
@@ -95,9 +95,8 @@ char* FAST_FUNC dname_dec(const uint8_t *cstr, int clen, const char *pre)
                 if (!dst) { /* first pass? */
                         /* allocate dst buffer and copy pre */
                         unsigned plen = strlen(pre);
-                        ret = dst = xmalloc(plen + len);
-                        memcpy(dst, pre, plen);
-                        dst += plen;
+                        ret = xmalloc(plen + len);
+                        dst = stpcpy(ret, pre);
                 } else {
                         dst[len - 1] = '\0';
                         break;