xref: /illumos-gate/usr/src/lib/libc/port/locale/lnumeric.c (revision a386cc11a86ecb60f5a48078d22c1500e2ad003e)
1 /*
2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
3  * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #include "lint.h"
29 #include <limits.h>
30 #include "ldpart.h"
31 #include "lnumeric.h"
32 #include "../i18n/_locale.h"
33 
34 extern int __nlocale_changed;
35 extern const char *__fix_locale_grouping_str(const char *);
36 
37 #define	LCNUMERIC_SIZE (sizeof (struct lc_numeric_T) / sizeof (char *))
38 
39 static char	numempty[] = { CHAR_MAX, '\0' };
40 
41 static const struct lc_numeric_T _C_numeric_locale = {
42 	".",		/* decimal_point */
43 	"",		/* thousands_sep */
44 	numempty	/* grouping */
45 };
46 
47 static struct lc_numeric_T _numeric_locale;
48 static int	_numeric_using_locale;
49 static char	*_numeric_locale_buf;
50 
51 int
52 __numeric_load_locale(const char *name)
53 {
54 	const struct lc_numeric_T *leg = &_C_numeric_locale;
55 
56 	int ret;
57 
58 	ret = __part_load_locale(name, &_numeric_using_locale,
59 	    &_numeric_locale_buf, "LC_NUMERIC", LCNUMERIC_SIZE, LCNUMERIC_SIZE,
60 	    (const char **)&_numeric_locale);
61 	if (ret == _LDP_ERROR)
62 		return (_LDP_ERROR);
63 
64 	__nlocale_changed = 1;
65 	if (ret == _LDP_LOADED) {
66 		/* Can't be empty according to C99 */
67 		if (*_numeric_locale.decimal_point == '\0')
68 			_numeric_locale.decimal_point =
69 			    _C_numeric_locale.decimal_point;
70 		_numeric_locale.grouping =
71 		    __fix_locale_grouping_str(_numeric_locale.grouping);
72 		leg = (const struct lc_numeric_T *)&_numeric_locale;
73 	}
74 	/* This is Solaris legacy, required for ABI compatability */
75 	_numeric[0] = *leg->decimal_point;
76 	_numeric[1] = *leg->grouping;
77 	return (ret);
78 }
79 
80 struct lc_numeric_T *
81 __get_current_numeric_locale(void)
82 {
83 	return (_numeric_using_locale ? &_numeric_locale :
84 	    (struct lc_numeric_T *)&_C_numeric_locale);
85 }
86