lib: Optimize str_append_n()

dovecot · May 3, 2016 · 88bcf81 · 88bcf81
1 parent 53e9cbd
commit 88bcf81
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/src/lib/str.c b/src/lib/str.c
@@ -83,12 +83,14 @@ bool str_equals(const string_t *str1, const string_t *str2)
 
 void str_append_n(string_t *str, const void *cstr, size_t max_len)
 {
+	const char *p;
 	size_t len;
 
-	len = 0;
-	while (len < max_len && ((const char *)cstr)[len] != '\0')
-		len++;
-
+	p = memchr(cstr, '\0', max_len);
+	if (p == NULL)
+		len = max_len;
+	else
+		len = p - (const char *)cstr;
 	buffer_append(str, cstr, len);
 }