1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
5 * 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 *
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
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/queue.h>
30
31 #include <assert.h>
32 #include <errno.h>
33 #include <langinfo.h>
34 #include <uchar.h>
35
36 #include "../iconv/citrus_hash.h"
37 #include "../iconv/citrus_module.h"
38 #include "../iconv/citrus_iconv.h"
39 #include "mblocal.h"
40
41 typedef struct {
42 bool initialized;
43 struct _citrus_iconv iconv;
44 union {
45 charXX_t widechar[SRCBUF_LEN];
46 char bytes[sizeof(charXX_t) * SRCBUF_LEN];
47 } srcbuf;
48 size_t srcbuf_len;
49 } _ConversionState;
50 _Static_assert(sizeof(_ConversionState) <= sizeof(mbstate_t),
51 "Size of _ConversionState must not exceed mbstate_t's size.");
52
53 size_t
cXXrtomb_l(char * __restrict s,charXX_t c,mbstate_t * __restrict ps,locale_t locale)54 cXXrtomb_l(char * __restrict s, charXX_t c, mbstate_t * __restrict ps,
55 locale_t locale)
56 {
57 _ConversionState *cs;
58 struct _citrus_iconv *handle;
59 char *src, *dst;
60 size_t srcleft, dstleft, invlen;
61 int err;
62
63 FIX_LOCALE(locale);
64 if (ps == NULL)
65 ps = &(XLOCALE_CTYPE(locale)->cXXrtomb);
66 cs = (_ConversionState *)ps;
67 handle = &cs->iconv;
68
69 /* Reinitialize mbstate_t. */
70 if (s == NULL || !cs->initialized) {
71 if (_citrus_iconv_open(&handle, UTF_XX_INTERNAL,
72 nl_langinfo_l(CODESET, locale)) != 0) {
73 cs->initialized = false;
74 errno = EINVAL;
75 return (-1);
76 }
77 cs->srcbuf_len = 0;
78 cs->initialized = true;
79 if (s == NULL)
80 return (1);
81 }
82
83 assert(cs->srcbuf_len < sizeof(cs->srcbuf.widechar) / sizeof(charXX_t));
84 cs->srcbuf.widechar[cs->srcbuf_len++] = c;
85
86 /* Perform conversion. */
87 src = cs->srcbuf.bytes;
88 srcleft = cs->srcbuf_len * sizeof(charXX_t);
89 dst = s;
90 dstleft = MB_CUR_MAX_L(locale);
91 err = _citrus_iconv_convert(handle, &src, &srcleft, &dst, &dstleft,
92 _CITRUS_ICONV_F_HIDE_INVALID, &invlen);
93
94 /* Character is part of a surrogate pair. We need more input. */
95 if (err == EINVAL)
96 return (0);
97 cs->srcbuf_len = 0;
98
99 /* Illegal sequence. */
100 if (dst == s) {
101 errno = EILSEQ;
102 return ((size_t)-1);
103 }
104 return (dst - s);
105 }
106
107 size_t
cXXrtomb(char * __restrict s,charXX_t c,mbstate_t * __restrict ps)108 cXXrtomb(char * __restrict s, charXX_t c, mbstate_t * __restrict ps)
109 {
110
111 return (cXXrtomb_l(s, c, ps, __get_locale()));
112 }
113