1 /* $NetBSD: delch.c,v 1.22 2009/07/22 16:57:14 roy Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)delch.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: delch.c,v 1.22 2009/07/22 16:57:14 roy Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <string.h> 42 #include <stdlib.h> 43 44 #include "curses.h" 45 #include "curses_private.h" 46 47 #ifndef _CURSES_USE_MACROS 48 /* 49 * delch -- 50 * Do a delete-char on the line, leaving (cury, curx) unchanged. 51 */ 52 int 53 delch(void) 54 { 55 return wdelch(stdscr); 56 } 57 58 /* 59 * mvdelch -- 60 * Do a delete-char on the line at (y, x) on stdscr. 61 */ 62 int 63 mvdelch(int y, int x) 64 { 65 return mvwdelch(stdscr, y, x); 66 } 67 68 /* 69 * mvwdelch -- 70 * Do a delete-char on the line at (y, x) of the given window. 71 */ 72 int 73 mvwdelch(WINDOW *win, int y, int x) 74 { 75 if (wmove(win, y, x) == ERR) 76 return ERR; 77 78 return wdelch(win); 79 } 80 81 #endif 82 83 /* 84 * wdelch -- 85 * Do a delete-char on the line, leaving (cury, curx) unchanged. 86 */ 87 int 88 wdelch(WINDOW *win) 89 { 90 __LDATA *end, *temp1, *temp2; 91 92 #ifndef HAVE_WCHAR 93 end = &win->alines[win->cury]->line[win->maxx - 1]; 94 temp1 = &win->alines[win->cury]->line[win->curx]; 95 temp2 = temp1 + 1; 96 while (temp1 < end) { 97 (void) memcpy(temp1, temp2, sizeof(__LDATA)); 98 temp1++, temp2++; 99 } 100 temp1->ch = win->bch; 101 if (__using_color && win != curscr) 102 temp1->attr = win->battr & __COLOR; 103 else 104 temp1->attr = 0; 105 __touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1); 106 return (OK); 107 #else 108 int cw, sx; 109 nschar_t *np, *tnp; 110 111 end = &win->alines[win->cury]->line[win->maxx - 1]; 112 sx = win->curx; 113 temp1 = &win->alines[win->cury]->line[win->curx]; 114 cw = WCOL( *temp1 ); 115 if ( cw < 0 ) { 116 temp1 += cw; 117 sx += cw; 118 cw = WCOL( *temp1 ); 119 } 120 np = temp1->nsp; 121 if (np) { 122 while ( np ) { 123 tnp = np->next; 124 free( np ); 125 np = tnp; 126 } 127 temp1->nsp = NULL; 128 } 129 if ( sx + cw < win->maxx ) { 130 temp2 = temp1 + cw; 131 while ( temp1 < end - ( cw - 1 )) { 132 ( void )memcpy( temp1, temp2, sizeof( __LDATA )); 133 temp1++, temp2++; 134 } 135 } 136 while ( temp1 <= end ) { 137 temp1->ch = ( wchar_t )btowc(( int ) win->bch ); 138 temp1->attr = 0; 139 if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR) 140 return ERR; 141 SET_WCOL(*temp1, 1); 142 temp1++; 143 } 144 __touchline(win, (int) win->cury, sx, (int) win->maxx - 1); 145 return (OK); 146 #endif /* HAVE_WCHAR */ 147 } 148