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 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 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