1 /*-
2 * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libc/locale/cXXrtomb_iconv.h 281550 2015-04-15 09:09:20Z tijl $
27 */
28
29
30 #include <sys/queue.h>
31
32 #include <assert.h>
33 #include <errno.h>
34 #include <langinfo.h>
35 #include <uchar.h>
36
37 #include "../citrus/citrus_hash.h"
38 #include "../citrus/citrus_module.h"
39 #include "../citrus/citrus_iconv.h"
40 #include "xlocale_private.h"
41
42 typedef struct {
43 bool initialized;
44 struct _citrus_iconv iconv;
45 union {
46 charXX_t widechar[SRCBUF_LEN];
47 char bytes[sizeof(charXX_t) * SRCBUF_LEN];
48 } srcbuf;
49 size_t srcbuf_len;
50 } _ConversionState;
51 _Static_assert(sizeof(_ConversionState) <= sizeof(mbstate_t),
52 "Size of _ConversionState must not exceed mbstate_t's size.");
53
54 size_t
cXXrtomb_l(char * __restrict s,charXX_t c,mbstate_t * __restrict ps,locale_t locale)55 cXXrtomb_l(char * __restrict s, charXX_t c, mbstate_t * __restrict ps,
56 locale_t locale)
57 {
58 _ConversionState *cs;
59 struct _citrus_iconv *handle;
60 char *src, *dst;
61 size_t srcleft, dstleft, invlen;
62 int err;
63
64 FIX_LOCALE(locale);
65 if (ps == NULL)
66 ps = &locale->cXXrtomb;
67 cs = (_ConversionState *)ps;
68 handle = &cs->iconv;
69
70 /* Reinitialize mbstate_t. */
71 if (s == NULL || !cs->initialized) {
72 if (_citrus_iconv_open(&handle, UTF_XX_INTERNAL,
73 nl_langinfo_l(CODESET, locale)) != 0) {
74 cs->initialized = false;
75 errno = EINVAL;
76 return (-1);
77 }
78 handle->cv_shared->ci_discard_ilseq = true;
79 handle->cv_shared->ci_hooks = NULL;
80 cs->srcbuf_len = 0;
81 cs->initialized = true;
82 if (s == NULL)
83 return (1);
84 }
85
86 assert(cs->srcbuf_len < sizeof(cs->srcbuf.widechar) / sizeof(charXX_t));
87 cs->srcbuf.widechar[cs->srcbuf_len++] = c;
88
89 /* Perform conversion. */
90 src = cs->srcbuf.bytes;
91 srcleft = cs->srcbuf_len * sizeof(charXX_t);
92 dst = s;
93 dstleft = MB_CUR_MAX_L(locale);
94 err = _citrus_iconv_convert(handle, &src, &srcleft, &dst, &dstleft,
95 0, &invlen);
96
97 /* Character is part of a surrogate pair. We need more input. */
98 if (err == EINVAL)
99 return (0);
100 cs->srcbuf_len = 0;
101
102 /* Illegal sequence. */
103 if (dst == s) {
104 errno = EILSEQ;
105 return ((size_t)-1);
106 }
107 return (dst - s);
108 }
109
110 size_t
cXXrtomb(char * __restrict s,charXX_t c,mbstate_t * __restrict ps)111 cXXrtomb(char * __restrict s, charXX_t c, mbstate_t * __restrict ps)
112 {
113
114 return (cXXrtomb_l(s, c, ps, __get_locale()));
115 }
116