1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/queue.h> 33 34 #include <assert.h> 35 #include <errno.h> 36 #include <langinfo.h> 37 #include <uchar.h> 38 39 #include "../iconv/citrus_hash.h" 40 #include "../iconv/citrus_module.h" 41 #include "../iconv/citrus_iconv.h" 42 #include "mblocal.h" 43 44 typedef struct { 45 bool initialized; 46 struct _citrus_iconv iconv; 47 union { 48 charXX_t widechar[SRCBUF_LEN]; 49 char bytes[sizeof(charXX_t) * SRCBUF_LEN]; 50 } srcbuf; 51 size_t srcbuf_len; 52 } _ConversionState; 53 _Static_assert(sizeof(_ConversionState) <= sizeof(mbstate_t), 54 "Size of _ConversionState must not exceed mbstate_t's size."); 55 56 size_t 57 cXXrtomb_l(char * __restrict s, charXX_t c, mbstate_t * __restrict ps, 58 locale_t locale) 59 { 60 _ConversionState *cs; 61 struct _citrus_iconv *handle; 62 char *src, *dst; 63 size_t srcleft, dstleft, invlen; 64 int err; 65 66 FIX_LOCALE(locale); 67 if (ps == NULL) 68 ps = &(XLOCALE_CTYPE(locale)->cXXrtomb); 69 cs = (_ConversionState *)ps; 70 handle = &cs->iconv; 71 72 /* Reinitialize mbstate_t. */ 73 if (s == NULL || !cs->initialized) { 74 if (_citrus_iconv_open(&handle, UTF_XX_INTERNAL, 75 nl_langinfo_l(CODESET, locale)) != 0) { 76 cs->initialized = false; 77 errno = EINVAL; 78 return (-1); 79 } 80 handle->cv_shared->ci_discard_ilseq = true; 81 handle->cv_shared->ci_hooks = NULL; 82 cs->srcbuf_len = 0; 83 cs->initialized = true; 84 if (s == NULL) 85 return (1); 86 } 87 88 assert(cs->srcbuf_len < sizeof(cs->srcbuf.widechar) / sizeof(charXX_t)); 89 cs->srcbuf.widechar[cs->srcbuf_len++] = c; 90 91 /* Perform conversion. */ 92 src = cs->srcbuf.bytes; 93 srcleft = cs->srcbuf_len * sizeof(charXX_t); 94 dst = s; 95 dstleft = MB_CUR_MAX_L(locale); 96 err = _citrus_iconv_convert(handle, &src, &srcleft, &dst, &dstleft, 97 0, &invlen); 98 99 /* Character is part of a surrogate pair. We need more input. */ 100 if (err == EINVAL) 101 return (0); 102 cs->srcbuf_len = 0; 103 104 /* Illegal sequence. */ 105 if (dst == s) { 106 errno = EILSEQ; 107 return ((size_t)-1); 108 } 109 return (dst - s); 110 } 111 112 size_t 113 cXXrtomb(char * __restrict s, charXX_t c, mbstate_t * __restrict ps) 114 { 115 116 return (cXXrtomb_l(s, c, ps, __get_locale())); 117 } 118