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 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.1	*/
32 
33 /*LINTLIBRARY*/
34 
35 #include <sys/types.h>
36 #include "utility.h"
37 
38 #define	first(f)	(0)
39 #define	last(f)		(f->maxpage - 1)
40 
41 /* next - return next page after current page(cyclic) */
42 static int
next(FORM * f)43 next(FORM *f)
44 {
45 	int p = P(f);
46 
47 	if (++p > last(f))
48 		p = first(f);
49 	return (p);
50 }
51 
52 /* prev - return previous page before current page(cyclic) */
53 static int
prev(FORM * f)54 prev(FORM *f)
55 {
56 	int p = P(f);
57 
58 	if (--p < first(f))
59 		p = last(f);
60 	return (p);
61 }
62 
63 int
_next_page(FORM * f)64 _next_page(FORM *f)
65 {
66 	return (_set_form_page(f, next(f), (FIELD *) 0));
67 }
68 
69 int
_prev_page(FORM * f)70 _prev_page(FORM *f)
71 {
72 	return (_set_form_page(f, prev(f), (FIELD *) 0));
73 }
74 
75 int
_first_page(FORM * f)76 _first_page(FORM *f)
77 {
78 	return (_set_form_page(f, first(f), (FIELD *) 0));
79 }
80 
81 int
_last_page(FORM * f)82 _last_page(FORM *f)
83 {
84 	return (_set_form_page(f, last(f), (FIELD *) 0));
85 }
86