InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/lib/libcurses/tty.c

C/C++ Source or Header | 1992-08-31 | 4.8 KB | 206 lines

/*-
 * Copyright (c) 1992 The 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[] = "@(#)tty.c    5.2 (Berkeley) 8/31/92";
#endif /* not lint */

/*
 * Terminal initialization routines.
 */
#include <sys/ioctl.h>

#include <curses.h>
#include <termios.h>
#include <unistd.h>

struct termios newtermio, origtermio;
static struct termios norawt, rawt;
static int useraw;

/*
 * gettmode --
 *    Do terminal type initialization.
 */
int
gettmode()
{
    if (tcgetattr(STDIN_FILENO, &origtermio))
        return (OK);

    GT = (origtermio.c_oflag & OXTABS) == 0;
    NONL = (origtermio.c_oflag & ONLCR) == 0;

    norawt = origtermio;
    norawt.c_oflag &= ~OXTABS;
    rawt = norawt;
    cfmakeraw(&rawt);

    return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt) ? ERR : OK);
}

int
raw()
{
    useraw = __pfast = __rawmode = 1;
    return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
}

int
noraw()
{
    useraw = __pfast = __rawmode = 0;
    return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
cbreak()
{
    rawt.c_lflag &= ~ICANON;
    norawt.c_lflag &= ~ICANON;

    __rawmode = 1;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
nocbreak()
{
    rawt.c_lflag |= ICANON;
    norawt.c_lflag |= ICANON;

    __rawmode = 0;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
echo()
{
    rawt.c_lflag |= ECHO;
    norawt.c_lflag |= ECHO;

    __echoit = 1;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
noecho()
{
    rawt.c_lflag &= ~ECHO;
    norawt.c_lflag &= ~ECHO;

    __echoit = 0;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
nl()
{
    rawt.c_iflag |= ICRNL;
    rawt.c_oflag |= ONLCR;
    norawt.c_iflag |= ICRNL;
    norawt.c_oflag |= ONLCR;

    __pfast = __rawmode;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
nonl()
{
    rawt.c_iflag &= ~ICRNL;
    rawt.c_oflag &= ~ONLCR;
    norawt.c_iflag &= ~ICRNL;
    norawt.c_oflag &= ~ONLCR;

    __pfast = 1;
    if (useraw)
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &rawt));
    else
        return (tcsetattr(STDIN_FILENO, TCSADRAIN, &norawt));
}

int
endwin()
{
    if (curscr) {
        if (curscr->_flags & _STANDOUT) {
            tputs(SE, 0, __cputchar);
            curscr->_flags &= ~_STANDOUT;
        }
        __endwin = 1;
    }

    (void)tputs(VE, 0, __cputchar);
    (void)tputs(TE, 0, __cputchar);
    (void)fflush(stdout);

    __echoit = origtermio.c_lflag & ECHO;
    __rawmode = origtermio.c_lflag & ICANON;
    __pfast = origtermio.c_iflag & ICRNL ? __rawmode : 1;
    return (tcsetattr(STDIN_FILENO, TCSADRAIN, &origtermio));
}

/*
 * The following routines, savetty and resetty are completely useless and
 * are left in only as stubs.  If people actually use them they will almost
 * certainly screw up the state of the world.
 */
static struct termios savedtty;
int
savetty()
{
    return (tcgetattr(STDIN_FILENO, &savedtty));
}

int
resetty()
{
    return (tcsetattr(STDIN_FILENO, TCSADRAIN, &savedtty));
}