lib/libedit/refresh.c

500 	wchar_t *ofd, *ols, *oe, *nfd, *nls, *ne;
511 	nfd = n;
534 	while (nfd < n) {
545 	if (*ofd == '\0' && *nfd == '\0') {
552 	while ((o > ofd) && (n > nfd) && (*--o == *--n))
566          * case 1: insert: scan from nfd to nls looking for *ofd
569 		for (c = *ofd, n = nfd; n < nls; n++) {
580 				    (2 * (p - n) > n - nfd)) {
590          * case 2: delete: scan from ofd to ols looking for *nfd
592 	if (*nfd) {
593 		for (c = *nfd, o = ofd; o < ols; o++) {
595 				for (n = nfd, p = o;
605 					nsb = nfd;
630 	fx = (int)((nsb - nfd) - (osb - ofd));
648 		if ((ols - ofd) < (nls - nfd)) {
664 		if ((ols - ofd) > (nls - nfd)) {
684 	fx = (int)((nsb - nfd) - (osb - ofd));
690 	ELRE_DEBUG(1, (__F, "nfd %td, nsb %td, nse %td, nls %td, ne %td\n",
691 		nfd - new, nsb - new, nse - new, nls - new, ne - new));
700 	re_printstr(el, "new-nfd", new, nfd);
702 	re_printstr(el, "nfd-nsb", nfd, nsb);
726          * \new                  \nfd  \nsb               \nse     \nls    \ne
728          * fx is the difference in length between the chars between nfd and
738          * net amount ((nsb-nfd) - (osb-ofd)) won't push the last useful
761 	if ((nsb != nfd) && fx > 0 &&
764 		    (__F, "first diff insert at %td...\r\n", nfd - new));
768 		terminal_move_to_char(el, (int)(nfd - new));
775 		         * insert fx chars of new starting at nfd
780 				terminal_insertwrite(el, nfd, fx);
782 				    el->el_terminal.t_size.h, nfd, fx);
785 		         * write (nsb-nfd) - fx chars of new starting at
786 		         * (nfd + fx)
788 			len = (size_t) ((nsb - nfd) - fx);
789 			terminal_overwrite(el, (nfd + fx), len);
790 			re__strncopy(ofd + fx, nfd + fx, len);
793 			len = (size_t)(nsb - nfd);
794 			terminal_overwrite(el, nfd, len);
795 			re__strncopy(ofd, nfd, len);
825 		         * write (nsb-nfd) chars of new starting at nfd
827 			len = (size_t) (nsb - nfd);
828 			terminal_overwrite(el, nfd, len);
829 			re__strncopy(ofd, nfd, len);
835 		         * write (nsb-nfd) chars of new starting at nfd
837 			terminal_overwrite(el, nfd, (size_t)(nsb - nfd));
887 	if ((nsb != nfd) && (osb - ofd) <= (nsb - nfd) && (fx == 0)) {
889 		    nfd - new));
891 		terminal_move_to_char(el, (int)(nfd - new));
902 			fx = (int)((nsb - nfd) - (osb - ofd));
905 				 * insert fx chars of new starting at nfd
909 				terminal_insertwrite(el, nfd, fx);
911 				    el->el_terminal.t_size.h, nfd, fx);
914 		         * write (nsb-nfd) - fx chars of new starting at
915 		         * (nfd + fx)
917 			len = (size_t) ((nsb - nfd) - fx);
918 			terminal_overwrite(el, (nfd + fx), len);
919 			re__strncopy(ofd + fx, nfd + fx, len);
922 			len = (size_t) (nsb - nfd);
923 			terminal_overwrite(el, nfd, len);
924 			re__strncopy(ofd, nfd, len);