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initscr.c revision 1.3 
      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, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)initscr.c	5.7 (Berkeley) 8/23/92";*/
     36 static char rcsid[] = "$Id: initscr.c,v 1.3 1993/08/07 05:48:55 mycroft Exp $";
     37 #endif	/* not lint */
     38 
     39 #include <curses.h>
     40 #include <signal.h>
     41 #include <stdlib.h>
     42 
     43 /*
     44  * initscr --
     45  *	Initialize the current and standard screen.
     46  */
     47 WINDOW *
     48 initscr()
     49 {
     50 	register char *sp;
     51 
     52 #ifdef DEBUG
     53 	__TRACE("initscr\n");
     54 #endif
     55 	if (My_term) {
     56 		if (setterm(Def_term) == ERR)
     57 			return (NULL);
     58 	} else {
     59 		gettmode();
     60 		if ((sp = getenv("TERM")) == NULL)
     61 			sp = Def_term;
     62 		if (setterm(sp) == ERR)
     63 			return (NULL);
     64 #ifdef DEBUG
     65 		__TRACE("initscr: term = %s\n", sp);
     66 #endif
     67 	}
     68 	tputs(TI, 0, __cputchar);
     69 	tputs(VS, 0, __cputchar);
     70 	(void)signal(SIGTSTP, tstp);
     71 	if (curscr != NULL) {
     72 #ifdef DEBUG
     73 		__TRACE("initscr: curscr = 0%o\n", curscr);
     74 #endif
     75 		delwin(curscr);
     76 	}
     77 #ifdef DEBUG
     78 	__TRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS);
     79 #endif
     80 	if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR)
     81 		return (NULL);
     82 	clearok(curscr, 1);
     83 	curscr->_flags &= ~_FULLLINE;
     84 	if (stdscr != NULL) {
     85 #ifdef DEBUG
     86 		__TRACE("initscr: stdscr = 0%o\n", stdscr);
     87 #endif
     88 		delwin(stdscr);
     89 	}
     90 	return(stdscr = newwin(LINES, COLS, 0, 0));
     91 }
     92