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insch.c revision 1.6 
      1 /*
      2  * Copyright (c) 1981, 1993
      3  *	The Regents of the University of California.  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 /* from: static char sccsid[] = "@(#)insch.c	8.1 (Berkeley) 6/4/93"; */
     36 static char *rcsid = "$Id: insch.c,v 1.6 1993/11/09 04:08:03 cgd Exp $";
     37 #endif	/* not lint */
     38 
     39 #include <curses.h>
     40 #include <string.h>
     41 
     42 /*
     43  * winsch --
     44  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     45  */
     46 int
     47 winsch(win, ch)
     48 	register WINDOW *win;
     49 	int ch;
     50 {
     51 
     52 	register __LDATA *end, *temp1, *temp2;
     53 
     54 	end = &win->lines[win->cury]->line[win->curx];
     55 	temp1 = &win->lines[win->cury]->line[win->maxx - 1];
     56 	temp2 = temp1 - 1;
     57 	while (temp1 > end) {
     58 		(void)memcpy(temp1, temp2, sizeof(__LDATA));
     59 		temp1--, temp2--;
     60 	}
     61 	temp1->ch = ch;
     62 	temp1->attr &= ~__STANDOUT;
     63 	__touchline(win, win->cury, win->curx, win->maxx - 1, 0);
     64 	if (win->cury == LINES - 1 &&
     65 	    (win->lines[LINES - 1]->line[COLS - 1].ch != ' ' ||
     66 	    win->lines[LINES -1]->line[COLS - 1].attr != 0))
     67 		if (win->flags & __SCROLLOK) {
     68 			wrefresh(win);
     69 			scroll(win);
     70 			win->cury--;
     71 		} else
     72 			return (ERR);
     73 	return (OK);
     74 }
     75