xref: /illumos-gate/usr/src/lib/libxcurses2/src/libc/xcurses/win_wchn.c (revision 440a8a36792bdf9ef51639066aab0b7771ffcab8)
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) 1995-1998 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /* LINTLIBRARY */
30 
31 /*
32  * win_wchn.c
33  *
34  * XCurses Library
35  *
36  * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
37  *
38  */
39 
40 #if M_RCSID
41 #ifndef lint
42 static char rcsID[] =
43 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
44 "libxcurses/src/libc/xcurses/rcs/win_wchn.c 1.2 1998/05/22 17:57:05 "
45 "cbates Exp $";
46 #endif
47 #endif
48 
49 #include <private.h>
50 
51 int
52 win_wchnstr(WINDOW *w, cchar_t *ccs, int n)
53 {
54 	int	x, eol;
55 	cchar_t	null = { 0 };
56 
57 	eol = (n < 0 || w->_maxx < w->_curx + n) ? w->_maxx : w->_curx + n;
58 
59 	for (x = w->_curx; x < eol; ++ccs) {
60 		*ccs = w->_line[w->_cury][x];
61 		ccs->_f = 1;
62 
63 		x = __m_cc_next(w, w->_cury, x);
64 	}
65 
66 	/*
67 	 * For an unbounded buffer or a buffer with room remaining,
68 	 * null terminate the buffer.
69 	 */
70 	if (n < 0 || eol < w->_curx + n) {
71 		*ccs = null;
72 	}
73 
74 	return (OK);
75 }
76