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 252547 2013-07-03 07:03:19Z peter $ 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 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 const char *src; 61 char *dst; 62 size_t srcleft, dstleft, invlen; 63 int err; 64 65 FIX_LOCALE(locale); 66 if (ps == NULL) 67 ps = &locale->cXXrtomb; 68 cs = (_ConversionState *)ps; 69 handle = &cs->iconv; 70 71 /* Reinitialize mbstate_t. */ 72 if (s == NULL || !cs->initialized) { 73 if (_citrus_iconv_open(&handle, UTF_XX_INTERNAL, 74 nl_langinfo_l(CODESET, locale)) != 0) { 75 cs->initialized = false; 76 errno = EINVAL; 77 return (-1); 78 } 79 handle->cv_shared->ci_discard_ilseq = true; 80 handle->cv_shared->ci_hooks = NULL; 81 cs->srcbuf_len = 0; 82 cs->initialized = true; 83 if (s == NULL) 84 return (1); 85 } 86 87 assert(cs->srcbuf_len < sizeof(cs->srcbuf.widechar) / sizeof(charXX_t)); 88 cs->srcbuf.widechar[cs->srcbuf_len++] = c; 89 90 /* Perform conversion. */ 91 src = cs->srcbuf.bytes; 92 srcleft = cs->srcbuf_len * sizeof(charXX_t); 93 dst = s; 94 dstleft = MB_CUR_MAX_L(locale); 95 err = _citrus_iconv_convert(handle, &src, &srcleft, &dst, &dstleft, 96 0, &invlen); 97 98 /* Character is part of a surrogate pair. We need more input. */ 99 if (err == EINVAL) 100 return (0); 101 cs->srcbuf_len = 0; 102 103 /* Illegal sequence. */ 104 if (dst == s) { 105 errno = EILSEQ; 106 return ((size_t)-1); 107 } 108 return (dst - s); 109 } 110 111 size_t 112 cXXrtomb(char * __restrict s, charXX_t c, mbstate_t * __restrict ps) 113 { 114 115 return (cXXrtomb_l(s, c, ps, __get_locale())); 116 } 117