extern void buffer_free(BUFFER *b);
extern void buffer_increase(BUFFER *b, size_t free_size_required);
-extern void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) __attribute__ (( format (printf, 3, 4)));
+extern void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) PRINTFLIKE(3, 4);
extern void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args);
-extern void buffer_sprintf(BUFFER *wb, const char *fmt, ...) __attribute__ (( format (printf, 2, 3)));
+extern void buffer_sprintf(BUFFER *wb, const char *fmt, ...) PRINTFLIKE(2,3);
extern void buffer_strcat_htmlescape(BUFFER *wb, const char *txt);
extern void buffer_char_replace(BUFFER *wb, char from, char to);