xref: /illumos-gate/usr/src/lib/libeti/form/common/chg_page.c (revision 201ceb75ab95f9bf1f42ea1dc9ab363b43ba47cf)
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 /*	Copyright (c) 1988 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*
27  *      Copyright (c) 1997, by Sun Microsystems, Inc.
28  *      All rights reserved.
29  */
30 
31 /*LINTLIBRARY*/
32 
33 #include <sys/types.h>
34 #include "utility.h"
35 
36 #define	first(f)	(0)
37 #define	last(f)		(f->maxpage - 1)
38 
39 /* next - return next page after current page(cyclic) */
40 static int
41 next(FORM *f)
42 {
43 	int p = P(f);
44 
45 	if (++p > last(f))
46 		p = first(f);
47 	return (p);
48 }
49 
50 /* prev - return previous page before current page(cyclic) */
51 static int
52 prev(FORM *f)
53 {
54 	int p = P(f);
55 
56 	if (--p < first(f))
57 		p = last(f);
58 	return (p);
59 }
60 
61 int
62 _next_page(FORM *f)
63 {
64 	return (_set_form_page(f, next(f), (FIELD *) 0));
65 }
66 
67 int
68 _prev_page(FORM *f)
69 {
70 	return (_set_form_page(f, prev(f), (FIELD *) 0));
71 }
72 
73 int
74 _first_page(FORM *f)
75 {
76 	return (_set_form_page(f, first(f), (FIELD *) 0));
77 }
78 
79 int
80 _last_page(FORM *f)
81 {
82 	return (_set_form_page(f, last(f), (FIELD *) 0));
83 }
84