summaryrefslogtreecommitdiff
path: root/usr/src/lib/libcurses/screen/wclrtoeol.c
blob: d24d5736fa4a803c88daba15ccdbf15a1c696459 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved	*/

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*LINTLIBRARY*/

#include	<sys/types.h>
#include	<stdlib.h>
#include	"curses_inc.h"

/* This routine clears up to the end of line. */

int
wclrtoeol(WINDOW *win)
{
	int	y = win->_cury;
	int	x = win->_curx;
	int	maxx = win->_maxx;
	int			cx;
	chtype		wc;

	if (win != curscr) {
		win->_nbyte = -1;
		if (_scrmax > 1) {
			if (ISMBIT(win->_y[y][x])) {
				win->_insmode = TRUE;
				if (_mbvalid(win) == ERR)
					return (ERR);
				x = win->_curx;
			}
			if (ISMBIT(win->_y[y][maxx - 1])) {
				for (cx = maxx - 1; cx >= x; --cx)
					if (!ISCBIT(win->_y[y][cx]))
						break;
				wc = RBYTE(win->_y[y][cx]);
				if (cx + _curs_scrwidth[TYPE(wc)] > maxx)
					maxx = cx - 1;
			}
		}
	}

	memSset(&win->_y[y][x], win->_bkgd, maxx - x);
	maxx = win->_maxx;

#ifdef	_VR3_COMPAT_CODE
	if (_y16update)
		(*_y16update)(win, 1, maxx - x, y, x);
#endif	/* _VR3_COMPAT_CODE */

	/* if curscr, reset blank structure */
	if (win == curscr) {
		if (_BEGNS[y] >= x)
			/* LINTED */
			_BEGNS[y] = (short) maxx;
		if (_ENDNS[y] >= x)
			_ENDNS[y] = _BEGNS[y] > x ? -1 : x-1;

		_CURHASH[y] = x == 0 ? 0 : _NOHASH;

		if (_MARKS != NULL) {
			char	*mkp = _MARKS[y];
			int	endx = COLS /
				BITSPERBYTE + (COLS  %BITSPERBYTE ? 1 : 0);
			int	m = x / BITSPERBYTE + 1;

			for (; m < endx; ++m)
				mkp[m] = 0;
			mkp += x / BITSPERBYTE;
			if ((m = x % BITSPERBYTE) == 0)
				*mkp = 0;
			else
				for (; m < BITSPERBYTE; ++m)
					*mkp &= ~(1 << m);

			/* if color terminal, do the same for color marks */

			if (_COLOR_MARKS != NULL) {
				mkp = _COLOR_MARKS[y];

				m = x / BITSPERBYTE + 1;
				for (; m < endx; ++m)
					mkp[m] = 0;
				mkp += x / BITSPERBYTE;
				if ((m = x % BITSPERBYTE) == 0)
					*mkp = 0;
				else
					for (; m < BITSPERBYTE; ++m)
						*mkp &= ~(1 << m);
			}
		}
		return (OK);
	} else {
		/* update firstch and lastch for the line. */
#ifdef	DEBUG
	if (outf)
		fprintf(outf, "CLRTOEOL: line %d begx = %d, maxx = %d, "
		    "lastch = %d, next firstch %d\n", y, win->_begx,
		    win->_firstch[y], win->_lastch[y], win->_firstch[y+1]);
#endif	/* DEBUG */

		if (win->_firstch[y] > x)
		    /* LINTED */
		    win->_firstch[y] = (short) x;
		win->_lastch[y] = maxx - 1;
		win->_flags |= _WINCHANGED;
		/* sync with ancestors structures */
		if (win->_sync)
			wsyncup(win);

		return (win->_immed ? wrefresh(win) : OK);
	}
}