Annotation of src/lib/libcurses/erase.c, Revision 1.2
1.1 cgd 1: /*
2: * Copyright (c) 1981 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: */
33:
34: #ifndef lint
35: static char sccsid[] = "@(#)erase.c 5.4 (Berkeley) 6/1/90";
36: #endif /* not lint */
37:
38: # include "curses.ext"
39:
40: /*
41: * This routine erases everything on the window.
42: *
43: */
44: werase(win)
45: reg WINDOW *win; {
46:
47: reg int y;
1.2 ! alm 48: reg chtype *sp, *end, *start, *maxx;
1.1 cgd 49: reg int minx;
50:
51: # ifdef DEBUG
52: fprintf(outf, "WERASE(%0.2o)\n", win);
53: # endif
54: for (y = 0; y < win->_maxy; y++) {
55: minx = _NOCHANGE;
56: start = win->_y[y];
57: end = &start[win->_maxx];
58: for (sp = start; sp < end; sp++)
59: if (*sp != ' ') {
60: maxx = sp;
61: if (minx == _NOCHANGE)
62: minx = sp - start;
63: *sp = ' ';
64: }
65: if (minx != _NOCHANGE)
66: touchline(win, y, minx, maxx - win->_y[y]);
67: }
68: win->_curx = win->_cury = 0;
69: }
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