getch.c revision 1.5 
1/*
2 * Copyright (c) 1981, 1993
3 *	The Regents of the University of California.  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
35static char sccsid[] = "@(#)getch.c	8.1 (Berkeley) 6/4/93";
36#endif	/* not lint */
37
38#include <curses.h>
39
40/*
41 * wgetch --
42 *	Read in a character from the window.
43 */
44int
45wgetch(win)
46	register WINDOW *win;
47{
48	register int inp, weset;
49
50	if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN)
51	    && win->curx == win->maxx - 1 && win->cury == win->maxy - 1)
52		return (ERR);
53#ifdef DEBUG
54	__CTRACE("wgetch: __echoit = %d, __rawmode = %d\n",
55	    __echoit, __rawmode);
56#endif
57	if (__echoit && !__rawmode) {
58		cbreak();
59		weset = 1;
60	} else
61		weset = 0;
62
63	inp = getchar();
64#ifdef DEBUG
65	__CTRACE("wgetch got '%s'\n", unctrl(inp));
66#endif
67	if (__echoit) {
68		mvwaddch(curscr,
69		    win->cury + win->begy, win->curx + win->begx, inp);
70		waddch(win, inp);
71	}
72	if (weset)
73		nocbreak();
74	return (inp);
75}
76