xref: /titanic_52/usr/src/lib/libc/port/locale/c32rtomb.c (revision 9a4a12bd7ce60cd60eae508b25eb7a8dae765274)
1*9a4a12bdSRobert Mustacchi /*
2*9a4a12bdSRobert Mustacchi  * This file and its contents are supplied under the terms of the
3*9a4a12bdSRobert Mustacchi  * Common Development and Distribution License ("CDDL"), version 1.0.
4*9a4a12bdSRobert Mustacchi  * You may only use this file in accordance with the terms of version
5*9a4a12bdSRobert Mustacchi  * 1.0 of the CDDL.
6*9a4a12bdSRobert Mustacchi  *
7*9a4a12bdSRobert Mustacchi  * A full copy of the text of the CDDL should have accompanied this
8*9a4a12bdSRobert Mustacchi  * source.  A copy of the CDDL is also available via the Internet at
9*9a4a12bdSRobert Mustacchi  * http://www.illumos.org/license/CDDL.
10*9a4a12bdSRobert Mustacchi  */
11*9a4a12bdSRobert Mustacchi 
12*9a4a12bdSRobert Mustacchi /*
13*9a4a12bdSRobert Mustacchi  * Copyright 2020 Robert Mustacchi
14*9a4a12bdSRobert Mustacchi  */
15*9a4a12bdSRobert Mustacchi 
16*9a4a12bdSRobert Mustacchi /*
17*9a4a12bdSRobert Mustacchi  * C11 c32rtomb(3C) support.
18*9a4a12bdSRobert Mustacchi  *
19*9a4a12bdSRobert Mustacchi  * The char32_t type is designed to represent a UTF-32 value, which is what we
20*9a4a12bdSRobert Mustacchi  * can represent with a wchar_t. This is basically a wrapper around wcrtomb().
21*9a4a12bdSRobert Mustacchi  */
22*9a4a12bdSRobert Mustacchi 
23*9a4a12bdSRobert Mustacchi #include <locale.h>
24*9a4a12bdSRobert Mustacchi #include <wchar.h>
25*9a4a12bdSRobert Mustacchi #include <xlocale.h>
26*9a4a12bdSRobert Mustacchi #include <uchar.h>
27*9a4a12bdSRobert Mustacchi #include <errno.h>
28*9a4a12bdSRobert Mustacchi #include "unicode.h"
29*9a4a12bdSRobert Mustacchi 
30*9a4a12bdSRobert Mustacchi static mbstate_t c32rtomb_state;
31*9a4a12bdSRobert Mustacchi 
32*9a4a12bdSRobert Mustacchi size_t
33*9a4a12bdSRobert Mustacchi c32rtomb(char *restrict str, char32_t c32, mbstate_t *restrict ps)
34*9a4a12bdSRobert Mustacchi {
35*9a4a12bdSRobert Mustacchi 	if ((c32 >= UNICODE_SUR_MIN && c32 <= UNICODE_SUR_MAX) ||
36*9a4a12bdSRobert Mustacchi 	    c32 > UNICODE_SUP_MAX) {
37*9a4a12bdSRobert Mustacchi 		errno = EILSEQ;
38*9a4a12bdSRobert Mustacchi 		return ((size_t)-1);
39*9a4a12bdSRobert Mustacchi 	}
40*9a4a12bdSRobert Mustacchi 
41*9a4a12bdSRobert Mustacchi 	if (ps == NULL) {
42*9a4a12bdSRobert Mustacchi 		ps = &c32rtomb_state;
43*9a4a12bdSRobert Mustacchi 	}
44*9a4a12bdSRobert Mustacchi 
45*9a4a12bdSRobert Mustacchi 	if (str == NULL) {
46*9a4a12bdSRobert Mustacchi 		c32 = L'\0';
47*9a4a12bdSRobert Mustacchi 	}
48*9a4a12bdSRobert Mustacchi 
49*9a4a12bdSRobert Mustacchi 	return (wcrtomb_l(str, (wchar_t)c32, ps, uselocale((locale_t)0)));
50*9a4a12bdSRobert Mustacchi }
51