xref: /titanic_50/usr/src/lib/libxcurses2/src/libc/xcurses/winchn.c (revision c869993e79c1eafbec61a56bf6cea848fe754c71)
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  * winchn.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[] = "$Header: /rd/src/libc/xcurses/rcs/winchn.c 1.1 "
43 "1995/06/13 20:54:33 ant Exp $";
44 #endif
45 #endif
46 
47 #include <private.h>
48 
49 int
50 winchnstr(WINDOW *w, chtype *chs, int n)
51 {
52 	int	x, eol;
53 	cchar_t	*cp;
54 
55 	eol = (n < 0 || w->_maxx < w->_curx + n) ? w->_maxx : w->_curx + n;
56 
57 	for (cp = w->_line[w->_cury], x = w->_curx; x < eol; ++x, ++chs) {
58 		if ((*chs = __m_cc_chtype(&cp[x])) == (chtype) ERR)
59 			return (ERR);
60 	}
61 
62 	/*
63 	 * For an unbounded buffer or a buffer with room remaining,
64 	 * null terminate the buffer.
65 	 */
66 	if (n < 0 || eol < w->_curx + n)
67 		*chs = 0;
68 
69 	return (OK);
70 }
71