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/cdefs.h> 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 "../iconv/citrus_hash.h" 38 #include "../iconv/citrus_module.h" 39 #include "../iconv/citrus_iconv.h" 40 #include "mblocal.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 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 = &(XLOCALE_CTYPE(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 cs->srcbuf_len = 0; 79 cs->initialized = true; 80 if (s == NULL) 81 return (1); 82 } 83 84 assert(cs->srcbuf_len < sizeof(cs->srcbuf.widechar) / sizeof(charXX_t)); 85 cs->srcbuf.widechar[cs->srcbuf_len++] = c; 86 87 /* Perform conversion. */ 88 src = cs->srcbuf.bytes; 89 srcleft = cs->srcbuf_len * sizeof(charXX_t); 90 dst = s; 91 dstleft = MB_CUR_MAX_L(locale); 92 err = _citrus_iconv_convert(handle, &src, &srcleft, &dst, &dstleft, 93 _CITRUS_ICONV_F_HIDE_INVALID, &invlen); 94 95 /* Character is part of a surrogate pair. We need more input. */ 96 if (err == EINVAL) 97 return (0); 98 cs->srcbuf_len = 0; 99 100 /* Illegal sequence. */ 101 if (dst == s) { 102 errno = EILSEQ; 103 return ((size_t)-1); 104 } 105 return (dst - s); 106 } 107 108 size_t 109 cXXrtomb(char * __restrict s, charXX_t c, mbstate_t * __restrict ps) 110 { 111 112 return (cXXrtomb_l(s, c, ps, __get_locale())); 113 } 114