xref: /illumos-gate/usr/src/lib/libxcurses/h/m_invari.h (revision 1da57d55)
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) 1996, by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 /*
28  * Copyright 1993 by Mortice Kern Systems Inc.  All rights reserved.
29  *
30  * $Header: /rd/h/rcs/m_invari.h 1.12 1994/07/06 17:41:39 miked Exp $
31  */
32 
33 /*
34  * m_invari.h:
35  *    Configuration and definitions for support of on systems (e.g EBCDIC)
36  *    where the POSIX.2 portable characters are not invariant
37  */
38 
39 #ifndef __M_M_INVARI_H__
40 #define	__M_M_INVARI_H__
41 
42 /*
43  * Are all characters in the portable character set invariant across
44  * all locales?  The results, for posix, if not, are undefined.
45  * For systems that want to try to deal with this, M_VARIANTS is set.
46  */
47 #ifdef	M_VARIANTS
48 
49 extern char	__m_invariant[];
50 extern char	__m_unvariant[];
51 
52 /*
53  * The M_INVARIANTINIT macro must be called to initialize: it returns -1
54  * on memory allocation error.  It may be called multiple times, but has
55  * no effect after the first call.  To reinitialize the variant <-->
56  * invariant tables after a new setlocale(), use M_INVARIANTREINIT().
57  * On error, m_error will have been invoked with an appropriate message.
58  */
59 #define	M_INVARIANTINIT()	m_invariantinit()
60 extern void	m_invariantinit(void);
61 #define	M_INVARIANTREINIT()	__m_setinvariant()
62 extern void	__m_setinvariant(void);
63 
64 /*
65  * Assume wide characters are always ok.
66  * Otherwise, always indirect thru the narrow un/invariant table.
67  * INVARIANT takes the character in the current locale, and produces an
68  * invariant value, equal to that the C compiler would have compiled.
69  * UNVARIANT is the inverse; it takes what the C compiler would have
70  * compiled, and returns the value in the current locale.
71  */
72 #define	M_INVARIANT(c)	(wctob(c) == EOF ? (c) : __m_invariant[c])
73 #define	M_UNVARIANT(c)	(wctob(c) == EOF ? (c) : __m_unvariant[c])
74 #define	M_UNVARIANTSTR(s)	m_unvariantstr(s)
75 char *m_unvariantstr(char const *);
76 #define	M_WUNVARIANTSTR(ws)	m_wunvariantstr(ws)
77 wchar_t *m_wunvariantstr(wchar_t const *);
78 
79 #else	/* M_VARIANTS */
80 
81 /* Normal system */
82 #define	M_INVARIANTINIT()	/* NULL */
83 #define M_INVARIANTREINIT()	/* NULL */
84 #define	M_INVARIANT(c)		(c)
85 #define	M_UNVARIANT(c)		(c)
86 #define	M_UNVARIANTSTR(s)	(s)
87 #define	M_WUNVARIANTSTR(ws)	(ws)
88 
89 #endif	/* M_VARIANTS */
90 
91 #endif /*__M_M_INVARI_H__*/
92 
93 
94 
95