1 /*
2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 #pragma ident "%Z%%M% %I% %E% SMI"
16
17 /*LINTLIBRARY*/
18
19 #ifndef lint
20 static char
21 sccsid[] = "@(#)erase.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
22 #endif /* not lint */
23
24 #include <stddef.h>
25 #include "curses.ext"
26
27 /*
28 * This routine erases everything on the window.
29 */
30
31 int
werase(WINDOW * win)32 werase(WINDOW *win)
33 {
34 int y;
35 char *sp, *end, *start, *maxx;
36 ptrdiff_t minx;
37
38 #ifdef DEBUG
39 fprintf(outf, "WERASE(%0.2o)\n", win);
40 #endif
41 for (y = 0; y < win->_maxy; y++) {
42 minx = _NOCHANGE;
43 start = win->_y[y];
44 end = &start[win->_maxx];
45 for (sp = start; sp < end; sp++)
46 if (*sp != ' ') {
47 maxx = sp;
48 if (minx == _NOCHANGE)
49 minx = sp - start;
50 *sp = ' ';
51 }
52 if (minx != _NOCHANGE)
53 (void) touchline(win, y, (int)minx,
54 (int)(maxx - win->_y[y]));
55 }
56 win->_curx = win->_cury = 0;
57 return (OK);
58 }
59