2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 __FBSDID("$FreeBSD$");
32 #include <sys/queue.h>
41 #include "../iconv/citrus_hash.h"
42 #include "../iconv/citrus_module.h"
43 #include "../iconv/citrus_iconv.h"
48 struct _citrus_iconv iconv;
49 char srcbuf[MB_LEN_MAX];
52 charXX_t widechar[DSTBUF_LEN];
53 char bytes[sizeof(charXX_t) * DSTBUF_LEN];
57 _Static_assert(sizeof(_ConversionState) <= sizeof(mbstate_t),
58 "Size of _ConversionState must not exceed mbstate_t's size.");
61 mbrtocXX_l(charXX_t * __restrict pc, const char * __restrict s, size_t n,
62 mbstate_t * __restrict ps, locale_t locale)
65 struct _citrus_iconv *handle;
71 ps = &(XLOCALE_CTYPE(locale)->mbrtocXX);
72 cs = (_ConversionState *)ps;
75 /* Reinitialize mbstate_t. */
76 if (s == NULL || !cs->initialized) {
77 if (_citrus_iconv_open(&handle,
78 nl_langinfo_l(CODESET, locale), UTF_XX_INTERNAL) != 0) {
79 cs->initialized = false;
83 handle->cv_shared->ci_discard_ilseq = true;
84 handle->cv_shared->ci_hooks = NULL;
85 cs->srcbuf_len = cs->dstbuf_len = 0;
86 cs->initialized = true;
91 /* See if we still have characters left from the previous invocation. */
92 if (cs->dstbuf_len > 0) {
97 /* Fill up the read buffer as far as possible. */
98 if (n > sizeof(cs->srcbuf) - cs->srcbuf_len)
99 n = sizeof(cs->srcbuf) - cs->srcbuf_len;
100 memcpy(cs->srcbuf + cs->srcbuf_len, s, n);
102 /* Convert as few characters to the dst buffer as possible. */
105 size_t srcleft, dstleft, invlen;
109 srcleft = cs->srcbuf_len + n;
110 dst = cs->dstbuf.bytes;
111 dstleft = i * sizeof(charXX_t);
112 assert(srcleft <= sizeof(cs->srcbuf) &&
113 dstleft <= sizeof(cs->dstbuf.bytes));
114 err = _citrus_iconv_convert(handle, &src, &srcleft,
115 &dst, &dstleft, 0, &invlen);
116 cs->dstbuf_len = (dst - cs->dstbuf.bytes) / sizeof(charXX_t);
118 /* Got new character(s). Return the first. */
119 if (cs->dstbuf_len > 0) {
120 assert(src - cs->srcbuf > cs->srcbuf_len);
121 retval = src - cs->srcbuf - cs->srcbuf_len;
126 /* Increase dst buffer size, to obtain the surrogate pair. */
130 /* Illegal sequence. */
137 /* Save unprocessed remainder for the next invocation. */
138 memmove(cs->srcbuf, src, srcleft);
139 cs->srcbuf_len = srcleft;
144 retchar = cs->dstbuf.widechar[0];
145 memmove(&cs->dstbuf.widechar[0], &cs->dstbuf.widechar[1],
146 --cs->dstbuf_len * sizeof(charXX_t));
155 mbrtocXX(charXX_t * __restrict pc, const char * __restrict s, size_t n,
156 mbstate_t * __restrict ps)
159 return (mbrtocXX_l(pc, s, n, ps, __get_locale()));