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/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
* raw.c
*
* Routines:
* raw()
* echo()
* nl()
* cbreak()
* noraw()
* noecho()
* nonl()
* nocbreak()
* qiflush()
* noqiflush()
* intrflush()
*
*/
#include "curses.priv.h"
#include "term.h" /* cur_term */
/*
* COOKED_INPUT defines the collection of input mode bits to be
* cleared when entering raw mode, then re-set by noraw().
*
* We used to clear ISTRIP and INPCK when going to raw mode. Keith
* Bostic says that's wrong, because those are hardware bits that the
* user has to get right in his/her initial environment -- he says
* curses can't do any good by clearing these, and may do harm. In
* 1995's world of 8N1 connections over error-correcting modems, all
* the parity-check stuff is pretty nearly irrelevant anyway.
*
* What's supposed to happen when noraw() executes has never been very
* well-defined. Yes, it should reset ISIG/ICANON/OPOST (historical
* practice is for it to attempt to take the driver back to cooked
* mode, rather going to some half-baked cbreak-like intermediate
* level).
*
* We make a design choice here to turn off CR/LF translation a la BSD
* when raw() is enabled, on the theory that a programmer requesting
* raw() ideally wants an 8-bit data stream that's been messed with as
* little as possible. The man pages document this.
*
* We originally opted for the simplest way to handle noraw(); just set all
* the flags we cleared. Unfortunately, having noraw() set IGNCR
* turned out to be too painful. So raw() now clears the COOKED_INPUT
* flags, but also clears (ICRNL|INLCR|IGNCR) which noraw() doesn't
* restore.
*
* Unfortunately, this means noraw() may still force some COOKED_INPUT
* flags on that the user had initially cleared via stty. It'll all
* come out in the wash when endwin() restores the user's original
* input bits (we hope...)
*
*/
#define COOKED_INPUT (IXON|IGNBRK|BRKINT|PARMRK)
int raw(void)
{
T(("raw() called"));
SP->_raw = TRUE;
SP->_cbreak = TRUE;
#ifdef TERMIOS
cur_term->Nttyb.c_lflag &= ~(ICANON|ISIG|IEXTEN);
cur_term->Nttyb.c_iflag &= ~(COOKED_INPUT|ICRNL|INLCR|IGNCR);
cur_term->Nttyb.c_oflag &= ~(OPOST);
cur_term->Nttyb.c_cc[VMIN] = 1;
cur_term->Nttyb.c_cc[VTIME] = 0;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags |= RAW;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int cbreak(void)
{
T(("cbreak() called"));
SP->_cbreak = TRUE;
#ifdef TERMIOS
cur_term->Nttyb.c_lflag &= ~ICANON;
cur_term->Nttyb.c_lflag |= ISIG;
cur_term->Nttyb.c_cc[VMIN] = 1;
cur_term->Nttyb.c_cc[VTIME] = 0;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags |= CBREAK;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int echo(void)
{
T(("echo() called"));
SP->_echo = TRUE;
#ifdef TERMIOS
cur_term->Nttyb.c_lflag |= ECHO;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags |= ECHO;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int nl(void)
{
T(("nl() called"));
SP->_nl = TRUE;
#ifdef TERMIOS
/* the code used to set IXON|IXOFF here, Ghod knows why... */
cur_term->Nttyb.c_iflag |= ICRNL;
cur_term->Nttyb.c_oflag |= OPOST|ONLCR;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags |= CRMOD;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int qiflush(void)
{
T(("qiflush() called"));
/*
* Note: this implementation may be wrong. See the comment under
* intrflush().
*/
#ifdef TERMIOS
cur_term->Nttyb.c_lflag &= ~(NOFLSH);
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
return ERR;
#endif
}
int noraw(void)
{
T(("noraw() called"));
SP->_raw = FALSE;
SP->_cbreak = FALSE;
#ifdef TERMIOS
cur_term->Nttyb.c_lflag |= ISIG|ICANON|IEXTEN;
cur_term->Nttyb.c_iflag |= COOKED_INPUT;
cur_term->Nttyb.c_oflag |= OPOST;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags &= ~(RAW|CBREAK);
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int nocbreak(void)
{
T(("nocbreak() called"));
SP->_cbreak = 0;
#ifdef TERMIOS
cur_term->Nttyb.c_lflag |= ICANON;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags &= ~CBREAK;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int noecho(void)
{
T(("noecho() called"));
SP->_echo = FALSE;
#ifdef TERMIOS
/*
* Turn off ECHONL to avoid having \n still be echoed when
* cooked mode is in effect (that is, ICANON is on).
*/
cur_term->Nttyb.c_lflag &= ~(ECHO|ECHONL);
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags &= ~ECHO;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int nonl(void)
{
T(("nonl() called"));
SP->_nl = FALSE;
#ifdef TERMIOS
cur_term->Nttyb.c_iflag &= ~ICRNL;
cur_term->Nttyb.c_oflag &= ~ONLCR;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
cur_term->Nttyb.sg_flags &= ~CRMOD;
stty(cur_term->Filedes, &cur_term->Nttyb);
return OK;
#endif
}
int noqiflush(void)
{
T(("noqiflush() called"));
/*
* Note: this implementation may be wrong. See the comment under
* intrflush().
*/
#ifdef TERMIOS
cur_term->Nttyb.c_lflag |= NOFLSH;
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
return ERR;
#endif
}
int intrflush(WINDOW *win, bool flag)
{
T(("intrflush() called"));
/*
* This call does the same thing as the qiflush()/noqiflush()
* pair. We know for certain that SVr3 intrflush() tweaks the
* NOFLSH bit; on the other hand, the match (in the SVr4 man
* pages) between the language describing NOFLSH in termio(7)
* and the language describing qiflush()/noqiflush() in
* curs_inopts(3x) is too exact to be coincidence.
*/
#ifdef TERMIOS
if (flag)
cur_term->Nttyb.c_lflag &= ~(NOFLSH);
else
cur_term->Nttyb.c_lflag |= (NOFLSH);
if((tcsetattr(cur_term->Filedes, TCSANOW, &cur_term->Nttyb)) == -1)
return ERR;
else
return OK;
#else
return ERR;
#endif
}
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