xref: /illumos-gate/usr/src/lib/libc/port/locale/localeconv.c (revision 694c35faa87b858ecdadfe4fc592615f4eefbb07)
1 /*
2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
3  * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
4  * Copyright (c) 1991, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 4. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #ifndef	_LCONV_C99
33 #define	_LCONV_C99	/* so we get all the extensions */
34 #endif
35 
36 #include "lint.h"
37 #include <locale.h>
38 #include "lmonetary.h"
39 #include "lnumeric.h"
40 
41 /*
42  * The localeconv() function constructs a struct lconv from the current
43  * monetary and numeric locales.
44  *
45  * Because localeconv() may be called many times (especially by library
46  * routines like printf() & strtod()), the approprate members of the
47  * lconv structure are computed only when the monetary or numeric
48  * locale has been changed.
49  */
50 int __mlocale_changed = 1;
51 int __nlocale_changed = 1;
52 
53 /*
54  * Return the current locale conversion.
55  */
56 struct lconv *
57 localeconv(void)
58 {
59 	static struct lconv ret;
60 
61 	if (__mlocale_changed) {
62 		/* LC_MONETARY part */
63 		struct lc_monetary_T *mptr;
64 
65 #define	M_ASSIGN_STR(NAME) (ret.NAME = (char *)mptr->NAME)
66 #define	M_ASSIGN_CHAR(NAME) (ret.NAME = mptr->NAME[0])
67 
68 		mptr = __get_current_monetary_locale();
69 		M_ASSIGN_STR(int_curr_symbol);
70 		M_ASSIGN_STR(currency_symbol);
71 		M_ASSIGN_STR(mon_decimal_point);
72 		M_ASSIGN_STR(mon_thousands_sep);
73 		M_ASSIGN_STR(mon_grouping);
74 		M_ASSIGN_STR(positive_sign);
75 		M_ASSIGN_STR(negative_sign);
76 		M_ASSIGN_CHAR(int_frac_digits);
77 		M_ASSIGN_CHAR(frac_digits);
78 		M_ASSIGN_CHAR(p_cs_precedes);
79 		M_ASSIGN_CHAR(p_sep_by_space);
80 		M_ASSIGN_CHAR(n_cs_precedes);
81 		M_ASSIGN_CHAR(n_sep_by_space);
82 		M_ASSIGN_CHAR(p_sign_posn);
83 		M_ASSIGN_CHAR(n_sign_posn);
84 		M_ASSIGN_CHAR(int_p_cs_precedes);
85 		M_ASSIGN_CHAR(int_n_cs_precedes);
86 		M_ASSIGN_CHAR(int_p_sep_by_space);
87 		M_ASSIGN_CHAR(int_n_sep_by_space);
88 		M_ASSIGN_CHAR(int_p_sign_posn);
89 		M_ASSIGN_CHAR(int_n_sign_posn);
90 		__mlocale_changed = 0;
91 	}
92 
93 	if (__nlocale_changed) {
94 		/* LC_NUMERIC part */
95 		struct lc_numeric_T *nptr;
96 
97 #define	N_ASSIGN_STR(NAME) (ret.NAME = (char *)nptr->NAME)
98 
99 		nptr = __get_current_numeric_locale();
100 		N_ASSIGN_STR(decimal_point);
101 		N_ASSIGN_STR(thousands_sep);
102 		N_ASSIGN_STR(grouping);
103 		__nlocale_changed = 0;
104 	}
105 
106 	return (&ret);
107 }
108