2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 #include <sys/queue.h>
39 #include "../iconv/citrus_hash.h"
40 #include "../iconv/citrus_module.h"
41 #include "../iconv/citrus_iconv.h"
46 struct _citrus_iconv iconv;
47 char srcbuf[MB_LEN_MAX];
50 charXX_t widechar[DSTBUF_LEN];
51 char bytes[sizeof(charXX_t) * DSTBUF_LEN];
55 _Static_assert(sizeof(_ConversionState) <= sizeof(mbstate_t),
56 "Size of _ConversionState must not exceed mbstate_t's size.");
59 mbrtocXX_l(charXX_t * __restrict pc, const char * __restrict s, size_t n,
60 mbstate_t * __restrict ps, locale_t locale)
63 struct _citrus_iconv *handle;
69 ps = &(XLOCALE_CTYPE(locale)->mbrtocXX);
70 cs = (_ConversionState *)ps;
73 /* Reinitialize mbstate_t. */
74 if (s == NULL || !cs->initialized) {
75 if (_citrus_iconv_open(&handle,
76 nl_langinfo_l(CODESET, locale), UTF_XX_INTERNAL) != 0) {
77 cs->initialized = false;
81 cs->srcbuf_len = cs->dstbuf_len = 0;
82 cs->initialized = true;
87 /* See if we still have characters left from the previous invocation. */
88 if (cs->dstbuf_len > 0) {
93 /* Fill up the read buffer as far as possible. */
94 if (n > sizeof(cs->srcbuf) - cs->srcbuf_len)
95 n = sizeof(cs->srcbuf) - cs->srcbuf_len;
96 memcpy(cs->srcbuf + cs->srcbuf_len, s, n);
98 /* Convert as few characters to the dst buffer as possible. */
101 size_t srcleft, dstleft, invlen;
105 srcleft = cs->srcbuf_len + n;
106 dst = cs->dstbuf.bytes;
107 dstleft = i * sizeof(charXX_t);
108 assert(srcleft <= sizeof(cs->srcbuf) &&
109 dstleft <= sizeof(cs->dstbuf.bytes));
110 err = _citrus_iconv_convert(handle, &src, &srcleft,
111 &dst, &dstleft, _CITRUS_ICONV_F_HIDE_INVALID, &invlen);
112 cs->dstbuf_len = (dst - cs->dstbuf.bytes) / sizeof(charXX_t);
114 /* Got new character(s). Return the first. */
115 if (cs->dstbuf_len > 0) {
116 assert(src - cs->srcbuf > cs->srcbuf_len);
117 retval = src - cs->srcbuf - cs->srcbuf_len;
122 /* Increase dst buffer size, to obtain the surrogate pair. */
126 /* Illegal sequence. */
133 /* Save unprocessed remainder for the next invocation. */
134 memmove(cs->srcbuf, src, srcleft);
135 cs->srcbuf_len = srcleft;
140 retchar = cs->dstbuf.widechar[0];
141 memmove(&cs->dstbuf.widechar[0], &cs->dstbuf.widechar[1],
142 --cs->dstbuf_len * sizeof(charXX_t));
151 mbrtocXX(charXX_t * __restrict pc, const char * __restrict s, size_t n,
152 mbstate_t * __restrict ps)
155 return (mbrtocXX_l(pc, s, n, ps, __get_locale()));