lib/libcurses/getch.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)getch.c     5.6 (Berkeley) 6/1/90";
#endif /* not lint */

# include       "curses.ext"

/*
 *      This routine reads in a character from the window.
 *
 */
wgetch(win)
reg WINDOW      *win; {

        reg bool        weset = FALSE;
        reg int         inp;

        if (!win->_scroll && (win->_flags&_FULLWIN)
            && win->_curx == win->_maxx - 1 && win->_cury == win->_maxy - 1)
                return ERR;
# ifdef DEBUG
        fprintf(outf, "WGETCH: _echoit = %c, _rawmode = %c\n", _echoit ? 'T' : 'F', _rawmode ? 'T' : 'F');
# endif
        if (_echoit && !_rawmode) {
                cbreak();
                weset++;
        }
        inp = getchar();
        if (inp != EOF) {
# ifdef DEBUG
        fprintf(outf,"WGETCH got '%s'\n",unctrl(inp));
# endif
        if (_echoit) {
                mvwaddch(curscr, win->_cury + win->_begy,
                                win->_curx + win->_begx, (unsigned char) inp);
                        waddch(win, (unsigned char) inp);
                }
        }
        if (weset)
                nocbreak();
        return inp;
}