lib/libedit/refresh.c

544 	wchar_t *ofd, *ols, *oe, *nfd, *nls, *ne;
555 	nfd = n;
578 	while (nfd < n) {
589 	if (*ofd == '\0' && *nfd == '\0') {
596 	while ((o > ofd) && (n > nfd) && (*--o == *--n))
610          * case 1: insert: scan from nfd to nls looking for *ofd
613 		for (c = *ofd, n = nfd; n < nls; n++) {
624 				    (2 * (p - n) > n - nfd)) {
634          * case 2: delete: scan from ofd to ols looking for *nfd
636 	if (*nfd) {
637 		for (c = *nfd, o = ofd; o < ols; o++) {
639 				for (n = nfd, p = o;
649 					nsb = nfd;
674 	fx = (int)((nsb - nfd) - (osb - ofd));
692 		if ((ols - ofd) < (nls - nfd)) {
708 		if ((ols - ofd) > (nls - nfd)) {
728 	fx = (int)((nsb - nfd) - (osb - ofd));
734 	ELRE_DEBUG(1, (__F, "nfd %td, nsb %td, nse %td, nls %td, ne %td\n",
735 		nfd - new, nsb - new, nse - new, nls - new, ne - new));
744 	re_printstr(el, "new-nfd", new, nfd);
746 	re_printstr(el, "nfd-nsb", nfd, nsb);
770          * \new                  \nfd  \nsb               \nse     \nls    \ne
772          * fx is the difference in length between the chars between nfd and
782          * net amount ((nsb-nfd) - (osb-ofd)) won't push the last useful
805 	if ((nsb != nfd) && fx > 0 &&
808 		    (__F, "first diff insert at %td...\r\n", nfd - new));
812 		terminal_move_to_char(el, (int)(nfd - new));
819 		         * insert fx chars of new starting at nfd
824 				terminal_insertwrite(el, nfd, fx);
826 				    el->el_terminal.t_size.h, nfd, fx);
829 		         * write (nsb-nfd) - fx chars of new starting at
830 		         * (nfd + fx)
832 			len = (size_t) ((nsb - nfd) - fx);
833 			terminal_overwrite(el, (nfd + fx), len);
834 			re__strncopy(ofd + fx, nfd + fx, len);
837 			len = (size_t)(nsb - nfd);
838 			terminal_overwrite(el, nfd, len);
839 			re__strncopy(ofd, nfd, len);
869 		         * write (nsb-nfd) chars of new starting at nfd
871 			len = (size_t) (nsb - nfd);
872 			terminal_overwrite(el, nfd, len);
873 			re__strncopy(ofd, nfd, len);
879 		         * write (nsb-nfd) chars of new starting at nfd
881 			terminal_overwrite(el, nfd, (size_t)(nsb - nfd));
931 	if ((nsb != nfd) && (osb - ofd) <= (nsb - nfd) && (fx == 0)) {
933 		    nfd - new));
935 		terminal_move_to_char(el, (int)(nfd - new));
946 			fx = (int)((nsb - nfd) - (osb - ofd));
949 				 * insert fx chars of new starting at nfd
953 				terminal_insertwrite(el, nfd, fx);
955 				    el->el_terminal.t_size.h, nfd, fx);
958 		         * write (nsb-nfd) - fx chars of new starting at
959 		         * (nfd + fx)
961 			len = (size_t) ((nsb - nfd) - fx);
962 			terminal_overwrite(el, (nfd + fx), len);
963 			re__strncopy(ofd + fx, nfd + fx, len);
966 			len = (size_t) (nsb - nfd);
967 			terminal_overwrite(el, nfd, len);
968 			re__strncopy(ofd, nfd, len);