-void buf_copy_lpad (char *, size_t, const char *, size_t);
-void buf_copy_rpad (char *, size_t, const char *, size_t);
-void buf_copy_str_lpad (char *, size_t, const char *);
-void buf_copy_str_rpad (char *, size_t, const char *);
+void buf_copy_lpad (char *, size_t, const char *, size_t, char pad);
+void buf_copy_rpad (char *, size_t, const char *, size_t, char pad);
+void buf_copy_str_lpad (char *, size_t, const char *, char pad);
+void buf_copy_str_rpad (char *, size_t, const char *, char pad);