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insch.c revision 1.4 
      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: @(#)insch.c	5.5 (Berkeley) 8/23/92";*/
     36 static char rcsid[] = "$Id: insch.c,v 1.4 1993/08/07 05:48:56 mycroft Exp $";
     37 #endif	/* not lint */
     38 
     39 #include <curses.h>
     40 
     41 /*
     42  * winsch --
     43  *	Do an insert-char on the line, leaving (_cury,_curx) unchanged.
     44  */
     45 int
     46 winsch(win, ch)
     47 	register WINDOW *win;
     48 	int ch;
     49 {
     50 
     51 	register char *end, *temp1, *temp2;
     52 
     53 	end = &win->_y[win->_cury][win->_curx];
     54 	temp1 = &win->_y[win->_cury][win->_maxx - 1];
     55 	temp2 = temp1 - 1;
     56 	while (temp1 > end)
     57 		*temp1-- = *temp2--;
     58 	*temp1 = ch;
     59 	touchline(win, win->_cury, win->_curx, win->_maxx - 1);
     60 	if (win->_cury == LINES - 1 && win->_y[LINES - 1][COLS - 1] != ' ')
     61 		if (win->_scroll) {
     62 			wrefresh(win);
     63 			scroll(win);
     64 			win->_cury--;
     65 		} else
     66 			return (ERR);
     67 	return (OK);
     68 }
     69