87     if (ptr <= gap_start())  in tell()
122   from = gap_start();  in gap_left()
173   to = gap_start();  in gap_right()
352     if (str_end <= buffer->gap_start()) {  in underflow()
356     if (gptr() < buffer->gap_start()) {  in underflow()
357 	setg(eback(), gptr(), buffer->gap_start());  in underflow()
360     if (gptr() == buffer->gap_start()) {  in underflow()
398 	setp(buffer->gap_start(), buffer->gap_end());  in overflow()
404     if (str_end <= buffer->gap_start()) {  in overflow()
408     else if (pptr() < buffer->gap_start()) {  in overflow()
410 	setp(pptr(), buffer->gap_start());  in overflow()
413     else if (pptr() == buffer->gap_start()) {  in overflow()
462     buf_char* gap_start = buffer->gap_start();  in seekoff()  local
463     if (new_pos > gap_start) {  in seekoff()
465 	new_pos += gap_end - gap_start;  in seekoff()
663     if (end->ptr(buffer) <= buffer->gap_start() ||  in length()
675     if (end->ptr(buffer) <= buffer->gap_start()  in copy_bytes()
682 	len1 = buffer->gap_start() - start1;  in copy_bytes()