xref: /original-bsd/lib/libcurses/getch.c (revision 2301fdfb)
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 are permitted
6  * provided that the above copyright notice and this paragraph are
7  * duplicated in all such forms and that any documentation,
8  * advertising materials, and other materials related to such
9  * distribution and use acknowledge that the software was developed
10  * by the University of California, Berkeley.  The name of the
11  * University may not be used to endorse or promote products derived
12  * from this software without specific prior written permission.
13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16  */
17 
18 #ifndef lint
19 static char sccsid[] = "@(#)getch.c	5.5 (Berkeley) 06/30/88";
20 #endif /* not lint */
21 
22 # include	"curses.ext"
23 
24 /*
25  *	This routine reads in a character from the window.
26  *
27  */
28 wgetch(win)
29 reg WINDOW	*win; {
30 
31 	reg bool	weset = FALSE;
32 	reg char	inp;
33 
34 	if (!win->_scroll && (win->_flags&_FULLWIN)
35 	    && win->_curx == win->_maxx - 1 && win->_cury == win->_maxy - 1)
36 		return ERR;
37 # ifdef DEBUG
38 	fprintf(outf, "WGETCH: _echoit = %c, _rawmode = %c\n", _echoit ? 'T' : 'F', _rawmode ? 'T' : 'F');
39 # endif
40 	if (_echoit && !_rawmode) {
41 		cbreak();
42 		weset++;
43 	}
44 	inp = getchar();
45 # ifdef DEBUG
46 	fprintf(outf,"WGETCH got '%s'\n",unctrl(inp));
47 # endif
48 	if (_echoit) {
49 		mvwaddch(curscr, win->_cury + win->_begy,
50 			win->_curx + win->_begx, inp);
51 		waddch(win, inp);
52 	}
53 	if (weset)
54 		nocbreak();
55 	return inp;
56 }
57