1/*	$NetBSD: chgat.c,v 1.9 2022/10/19 06:09:27 blymn Exp $	*/
2
3/*
4 * Copyright (c) 2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Joerg Sonnenberger.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: chgat.c,v 1.9 2022/10/19 06:09:27 blymn Exp $");
34
35#include "curses.h"
36#include "curses_private.h"
37
38int
39chgat(int n, attr_t attr, short color, const void *opts)
40{
41	return wchgat(stdscr, n, attr, color, opts);
42}
43
44int
45mvchgat(int y, int x, int n, attr_t attr, short color,
46    const void *opts)
47{
48	return mvwchgat(stdscr, y, x, n, attr, color, opts);
49}
50
51int
52wchgat(WINDOW *win, int n, attr_t attr, short color, const void *opts)
53{
54	return mvwchgat(win, win->cury, win->curx, n, attr, color, opts);
55}
56
57int
58mvwchgat(WINDOW *win , int y, int x, int count, attr_t attr, short color,
59    const void *opts)
60{
61	__LINE *lp;
62	__LDATA *lc;
63
64	if (x < 0 || y < 0)
65		return (ERR);
66	if (x >= win->maxx || y >= win->maxy)
67		return (ERR);
68
69	attr = (attr & ~__COLOR) | COLOR_PAIR(color);
70
71	if (count < 0 || count > win->maxx - x)
72		count = win->maxx - x;
73
74	__CTRACE(__CTRACE_ATTR, "mvwchgat: x: %d y: %d count: %d attr: 0x%x "
75	    "color pair %d\n", x, y, count, (attr & ~__COLOR),
76	    PAIR_NUMBER(color));
77	lp = win->alines[y];
78	lc = &lp->line[x];
79
80	if (x + win->ch_off < *lp->firstchp)
81		*lp->firstchp = x + win->ch_off;
82
83	if (x + win->ch_off + count > *lp->lastchp)
84		*lp->lastchp = x + win->ch_off + count;
85
86	lp->flags |= __ISDIRTY;
87
88	while (count-- > 0) {
89#ifdef HAVE_WCHAR
90		lc->attr = (lc->attr & ~WA_ATTRIBUTES) | attr;
91#else
92		lc->attr = attr;
93#endif
94		++lc;
95	}
96
97	return OK;
98}
99