2 * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include "xlocale_private.h"
34 char16_t trail_surrogate;
35 mbstate_t c32_mbstate;
39 mbrtoc16_l(char16_t * __restrict pc16, const char * __restrict s, size_t n,
40 mbstate_t * __restrict ps, locale_t locale)
48 ps = &locale->mbrtoc16;
49 cs = (_Char16State *)ps;
52 * Call straight into mbrtoc32_l() if we don't need to return a
53 * character value. According to the spec, if s is a null
54 * pointer, the value of parameter pc16 is also ignored.
56 if (pc16 == NULL || s == NULL) {
57 cs->trail_surrogate = 0;
58 return (mbrtoc32_l(NULL, s, n, &cs->c32_mbstate, locale));
61 /* Return the trail surrogate from the previous invocation. */
62 if (cs->trail_surrogate >= 0xdc00 && cs->trail_surrogate <= 0xdfff) {
63 *pc16 = cs->trail_surrogate;
64 cs->trail_surrogate = 0;
68 len = mbrtoc32_l(&c32, s, n, &cs->c32_mbstate, locale);
71 /* Fits in one UTF-16 character. */
74 /* Split up in a surrogate pair. */
76 *pc16 = 0xd800 | (c32 >> 10);
77 cs->trail_surrogate = 0xdc00 | (c32 & 0x3ff);
84 mbrtoc16(char16_t * __restrict pc16, const char * __restrict s, size_t n,
85 mbstate_t * __restrict ps)
88 return (mbrtoc16_l(pc16, s, n, ps, __get_locale()));