commp_skip_white_space
extern int commp_skip_white_space(const char **, const char *);
if (commp_skip_white_space(&start, end) != 0) {
(void) commp_skip_white_space(¤t, end);
(void) commp_skip_white_space(¤t, end);
if (commp_skip_white_space(¤t, end) != 0)
(void) commp_skip_white_space(¤t, end);