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initscr.c revision 1.1 
      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[] = "@(#)initscr.c	5.6 (Berkeley) 3/3/91";
     36 #endif /* not lint */
     37 
     38 # include	"curses.ext"
     39 # include	<signal.h>
     40 
     41 extern char	*getenv();
     42 
     43 /*
     44  *	This routine initializes the current and standard screen.
     45  *
     46  */
     47 WINDOW *
     48 initscr() {
     49 
     50 	reg char	*sp;
     51 	void		tstp();
     52 
     53 # ifdef DEBUG
     54 	fprintf(outf, "INITSCR()\n");
     55 # endif
     56 	if (My_term)
     57 		setterm(Def_term);
     58 	else {
     59 		gettmode();
     60 		if ((sp = getenv("TERM")) == NULL)
     61 			sp = Def_term;
     62 		setterm(sp);
     63 # ifdef DEBUG
     64 		fprintf(outf, "INITSCR: term = %s\n", sp);
     65 # endif
     66 	}
     67 	_puts(TI);
     68 	_puts(VS);
     69 # ifdef SIGTSTP
     70 	signal(SIGTSTP, tstp);
     71 # endif
     72 	if (curscr != NULL) {
     73 # ifdef DEBUG
     74 		fprintf(outf, "INITSCR: curscr = 0%o\n", curscr);
     75 # endif
     76 		delwin(curscr);
     77 	}
     78 # ifdef DEBUG
     79 	fprintf(outf, "LINES = %d, COLS = %d\n", LINES, COLS);
     80 # endif
     81 	if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR)
     82 		return ERR;
     83 	clearok(curscr, TRUE);
     84 	curscr->_flags &= ~_FULLLINE;
     85 	if (stdscr != NULL) {
     86 # ifdef DEBUG
     87 		fprintf(outf, "INITSCR: stdscr = 0%o\n", stdscr);
     88 # endif
     89 		delwin(stdscr);
     90 	}
     91 	stdscr = newwin(LINES, COLS, 0, 0);
     92 	return stdscr;
     93 }
     94