NetBSD/lib/libcurses/initscr.c

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/* $NetBSD: initscr.c,v 1.18 2000/05/01 12:30:30 blymn Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)initscr.c 8.2 (Berkeley) 5/4/94";
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#else
__RCSID("$NetBSD: initscr.c,v 1.18 2000/05/01 12:30:30 blymn Exp $");
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#endif
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#endif /* not lint */
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#include <signal.h>
#include <stdlib.h>
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#include "curses.h"
#include "curses_private.h"
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/* Window list */
struct __winlist *__winlistp;
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/*
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* initscr --
* Initialize the current and standard screen.
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*/
WINDOW *
initscr(void)
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{
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char *sp;
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#ifdef DEBUG
__CTRACE("initscr\n");
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#endif
__echoit = 1;
__pfast = __rawmode = __noqch = __endwin = 0;
__nca = A_NORMAL;
if (gettmode() == ERR)
return (NULL);
/*
* If My_term is set, or can't find a terminal in the environment,
* use Def_term.
*/
if (My_term || (sp = getenv("TERM")) == NULL)
sp = (char *)Def_term;
if (setterm(sp) == ERR)
return (NULL);
/* Need either homing or cursor motion for refreshes */
if (!HO && !CM)
return (NULL);
__winlistp = NULL;
if (curscr != NULL)
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delwin(curscr);
if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR)
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return (NULL);
clearok(curscr, 1);
if (stdscr != NULL)
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delwin(stdscr);
if ((stdscr = newwin(LINES, COLS, 0, 0)) == ERR) {
delwin(curscr);
return (NULL);
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}
if (__virtscr != NULL)
delwin(__virtscr);
if ((__virtscr = newwin(LINES, COLS, 0, 0)) == ERR) {
delwin(curscr);
delwin(stdscr);
return (NULL);
}
__init_getch();
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__init_acs();
__set_stophandler();
#ifdef DEBUG
__CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS);
#endif
__startwin();
return (stdscr);
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}