getch.c revision 1.4 
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[] = "from: @(#)getch.c	5.7 (Berkeley) 8/23/92";*/
36static char rcsid[] = "$Id: getch.c,v 1.4 1993/08/07 05:48:52 mycroft Exp $";
37#endif	/* not lint */
38
39#include <curses.h>
40
41/*
42 * wgetch --
43 *	Read in a character from the window.
44 */
45int
46wgetch(win)
47	register WINDOW *win;
48{
49	register int inp, weset;
50
51	if (!win->_scroll && (win->_flags & _FULLWIN)
52	    && win->_curx == win->_maxx - 1 && win->_cury == win->_maxy - 1)
53		return (ERR);
54#ifdef DEBUG
55	__TRACE("wgetch: __echoit = %d, __rawmode = %d\n",
56	    __echoit, __rawmode);
57#endif
58	if (__echoit && !__rawmode) {
59		cbreak();
60		weset = 1;
61	} else
62		weset = 0;
63
64	inp = getchar();
65#ifdef DEBUG
66	__TRACE("wgetch got '%s'\n", unctrl(inp));
67#endif
68	if (__echoit) {
69		mvwaddch(curscr,
70		    win->_cury + win->_begy, win->_curx + win->_begx, inp);
71		waddch(win, inp);
72	}
73	if (weset)
74		nocbreak();
75	return (inp);
76}
77