/* $OpenBSD: wwinschar.c,v 1.3 1996/06/26 05:43:44 deraadt Exp $ */ /* $NetBSD: wwinschar.c,v 1.4 1996/02/08 21:49:09 mycroft Exp $ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Edward Wang at The University of California, Berkeley. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)wwinschar.c 8.1 (Berkeley) 6/6/93"; #else static char rcsid[] = "$OpenBSD: wwinschar.c,v 1.3 1996/06/26 05:43:44 deraadt Exp $"; #endif #endif /* not lint */ #include "ww.h" #include "tt.h" wwinschar(w, row, col, c, m) register struct ww *w; char c, m; { register i; int nvis; short x = c | m << WWC_MSHIFT; /* * First, shift the line. */ { register union ww_char *p, *q; p = &w->ww_buf[row][w->ww_b.r]; q = p - 1; for (i = w->ww_b.r - col; --i > 0;) *--p = *--q; q->c_w = x; } /* * If can't see it, just return. */ if (row < w->ww_i.t || row >= w->ww_i.b || w->ww_i.r <= 0 || w->ww_i.r <= col) return; if (col < w->ww_i.l) col = w->ww_i.l; /* * Now find out how much is actually changed, and fix wwns. */ { register union ww_char *buf; register char *win; register union ww_char *ns; register unsigned char *smap; char touched; nvis = 0; smap = &wwsmap[row][col]; for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) ; if (i >= w->ww_i.r) return; col = i; buf = w->ww_buf[row]; win = w->ww_win[row]; ns = wwns[row]; smap = &wwsmap[row][i]; touched = wwtouched[row]; for (; i < w->ww_i.r; i++) { if (*smap++ != w->ww_index) continue; touched |= WWU_TOUCHED; if (win[i]) ns[i].c_w = buf[i].c_w ^ win[i] << WWC_MSHIFT; else { nvis++; ns[i] = buf[i]; } } wwtouched[row] = touched; } /* * Can/Should we use delete character? */ if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) { register union ww_char *p, *q; if (tt.tt_inschar) xxinschar(row, col, c, m); else { xxinsspace(row, col); x = ' '; } p = &wwos[row][wwncol]; q = p - 1; for (i = wwncol - col; --i > 0;) *--p = *--q; q->c_w = x; } }