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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1995, by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 /*
     30  * wdelch.c
     31  *
     32  * XCurses Library
     33  *
     34  * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
     35  *
     36  */
     37 
     38 #ifdef M_RCSID
     39 #ifndef lint
     40 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wdelch.c 1.3 1995/06/21 20:30:59 ant Exp $";
     41 #endif
     42 #endif
     43 
     44 #include <private.h>
     45 
     46 /*f
     47  * Delete the character under the cursor; all characters to the right of
     48  * the cursor on the same line are moved to the left by one position and
     49  * the last character on the line is filled with a blank. The cursor
     50  * position does not change.
     51  */
     52 int
     53 wdelch(w)
     54 WINDOW *w;
     55 {
     56 	extern void *memcpy();	/* quiet sparcv9 warning */
     57 	int next, width, y, x;
     58 
     59 #ifdef M_CURSES_TRACE
     60 	__m_trace("wdelch(%p) at (%d,%d)", w, w->_cury, w->_curx);
     61 #endif
     62 
     63 	y = w->_cury;
     64 	x = w->_curx;
     65 
     66 	next = __m_cc_next(w, y, x);
     67 	x = __m_cc_first(w, y, x);
     68 
     69 	/* Determine the character width to delete. */
     70 	width = __m_cc_width(&w->_line[y][x]);
     71 
     72 	/* Shift line left to erase the character under the cursor. */
     73 	(void) memcpy(
     74 		&w->_line[y][x], &w->_line[y][next],
     75 		(w->_maxx - next) * sizeof **w->_line
     76 	);
     77 
     78 	/* Add blank(s) to the end of line based on the width
     79 	 * of the character that was deleted.
     80 	 */
     81 	(void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1);
     82 
     83 	/* Set dity region markers. */
     84 	if (x < w->_first[y])
     85 		w->_first[y] = x;
     86 	w->_last[y] = w->_maxx;
     87 
     88 	WSYNC(w);
     89 
     90 	return __m_return_code("wdelch", WFLUSH(w));
     91 }
     92