move strndup to libi3

i3bar/src/xcb.c

@@ -36,29 +36,6 @@
 #include "common.h"
 #include "libi3.h"
 
-#if defined(__APPLE__)
-
-/*
- * Taken from FreeBSD
- * Returns a pointer to a new string which is a duplicate of the
- * string, but only copies at most n characters.
- *
- */
-char *strndup(const char *str, size_t n) {
-    size_t len;
-    char *copy;
-
-    for (len = 0; len < n && str[len]; len++)
-        continue;
-
-    copy = smalloc(len + 1);
-    memcpy(copy, str, len);
-    copy[len] = '\0';
-    return (copy);
-}
-
-#endif
-
 /* We save the Atoms in an easy to access array, indexed by an enum */
 enum {
     #define ATOM_DO(name) name,