2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Edward Wang at The University of California, Berkeley.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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38 static char sccsid[] = "@(#)wwdelchar.c 8.1 (Berkeley) 6/6/93";
44 wwdelchar(w, row, col)
45 register struct ww *w;
51 * First, shift the line.
54 register union ww_char *p, *q;
56 p = &w->ww_buf[row][col];
58 for (i = w->ww_b.r - col; --i > 0;)
64 * If can't see it, just return.
66 if (row < w->ww_i.t || row >= w->ww_i.b
67 || w->ww_i.r <= 0 || w->ww_i.r <= col)
74 * Now find out how much is actually changed, and fix wwns.
77 register union ww_char *buf;
79 register union ww_char *ns;
84 smap = &wwsmap[row][col];
85 for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
93 smap = &wwsmap[row][i];
94 touched = wwtouched[row];
95 for (; i < w->ww_i.r; i++) {
96 if (*smap++ != w->ww_index)
98 touched |= WWU_TOUCHED;
101 buf[i].c_w ^ win[i] << WWC_MSHIFT;
107 wwtouched[row] = touched;
111 * Can/Should we use delete character?
113 if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
114 register union ww_char *p, *q;
119 for (i = wwncol - col; --i > 0;)