xref: /illumos-gate/usr/src/lib/libcurses/screen/slk_set.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 1997 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 /*LINTLIBRARY*/
41 
42 #include	<sys/types.h>
43 #include	<string.h>
44 #include	<unistd.h>
45 #include	"curses_inc.h"
46 
47 /*
48  * Set a soft label.
49  *
50  * n:	label number
51  * lab:	the string
52  * f:	0, 1, 2 for left, center, right-justification
53  */
54 
55 int
56 slk_set(int n, char *lab, int f)
57 {
58 	SLK_MAP	*slk = SP->slk;
59 	int	len, slklen = slk->_len, left;
60 	char		*cp, nlab[LABLEN + 1];
61 
62 	if ((slk == NULL) || f < 0 || f > 2 || n < 1 || n > slk->_num)
63 		return (ERR);
64 
65 	/* 0-indexing internally */
66 	n--;
67 
68 	if (lab == NULL) {
69 		lab = "";
70 
71 	} else {
72 		/* chop lengthy label */
73 		/* LINTED */
74 		if ((len = (int) strlen(lab)) > slklen)
75 			lab[len = slklen] = '\0';
76 	}
77 
78 	/* make the new display label */
79 	for (cp = nlab + slklen - 1; cp >= nlab; cp--)
80 		*cp = ' ';
81 	nlab[slklen] = '\0';
82 	if (f == 0)
83 		left = 0;
84 	else
85 		left = (slklen - len) / ((f == 1) ? 2 : 1);
86 
87 	(void) memcpy(nlab + left, lab, len);
88 
89 	if (strcmp(slk->_ldis[n], nlab) != 0) {
90 		(void) memcpy(slk->_lval[n], lab, len + 1);
91 		(void) memcpy(slk->_ldis[n], nlab, slklen + 1);
92 		slk->_changed = slk->_lch[n] = TRUE;
93 	}
94 
95 	return (OK);
96 }
97