1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Paul Borman at Krystal Technologies. 8 * 9 * Copyright (c) 2011 The FreeBSD Foundation 10 * All rights reserved. 11 * Portions of this software were developed by David Chisnall 12 * under sponsorship from the FreeBSD Foundation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <errno.h> 43 #include <limits.h> 44 #include <runetype.h> 45 #include <stddef.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <wchar.h> 50 #include "mblocal.h" 51 52 static size_t _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict, 53 size_t, mbstate_t * __restrict); 54 static int _ascii_mbsinit(const mbstate_t *); 55 static size_t _ascii_mbsnrtowcs(wchar_t * __restrict dst, 56 const char ** __restrict src, size_t nms, size_t len, 57 mbstate_t * __restrict ps __unused); 58 static size_t _ascii_wcrtomb(char * __restrict, wchar_t, 59 mbstate_t * __restrict); 60 static size_t _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 61 size_t, size_t, mbstate_t * __restrict); 62 63 int 64 _ascii_init(struct xlocale_ctype *l,_RuneLocale *rl) 65 { 66 67 l->__mbrtowc = _ascii_mbrtowc; 68 l->__mbsinit = _ascii_mbsinit; 69 l->__mbsnrtowcs = _ascii_mbsnrtowcs; 70 l->__wcrtomb = _ascii_wcrtomb; 71 l->__wcsnrtombs = _ascii_wcsnrtombs; 72 l->runes = rl; 73 l->__mb_cur_max = 1; 74 l->__mb_sb_limit = 128; 75 return(0); 76 } 77 78 static int 79 _ascii_mbsinit(const mbstate_t *ps __unused) 80 { 81 82 /* 83 * Encoding is not state dependent - we are always in the 84 * initial state. 85 */ 86 return (1); 87 } 88 89 static size_t 90 _ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 91 mbstate_t * __restrict ps __unused) 92 { 93 94 if (s == NULL) 95 /* Reset to initial shift state (no-op) */ 96 return (0); 97 if (n == 0) 98 /* Incomplete multibyte sequence */ 99 return ((size_t)-2); 100 if (*s & 0x80) { 101 errno = EILSEQ; 102 return ((size_t)-1); 103 } 104 if (pwc != NULL) 105 *pwc = (unsigned char)*s; 106 return (*s == '\0' ? 0 : 1); 107 } 108 109 static size_t 110 _ascii_wcrtomb(char * __restrict s, wchar_t wc, 111 mbstate_t * __restrict ps __unused) 112 { 113 114 if (s == NULL) 115 /* Reset to initial shift state (no-op) */ 116 return (1); 117 if (wc < 0 || wc > 127) { 118 errno = EILSEQ; 119 return ((size_t)-1); 120 } 121 *s = (unsigned char)wc; 122 return (1); 123 } 124 125 static size_t 126 _ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 127 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 128 { 129 const char *s; 130 size_t nchr; 131 132 if (dst == NULL) { 133 for (s = *src; nms > 0 && *s != '\0'; s++, nms--) { 134 if (*s & 0x80) { 135 errno = EILSEQ; 136 return ((size_t)-1); 137 } 138 } 139 return (s - *src); 140 } 141 142 s = *src; 143 nchr = 0; 144 while (len-- > 0 && nms-- > 0) { 145 if (*s & 0x80) { 146 errno = EILSEQ; 147 return ((size_t)-1); 148 } 149 if ((*dst++ = (unsigned char)*s++) == L'\0') { 150 *src = NULL; 151 return (nchr); 152 } 153 nchr++; 154 } 155 *src = s; 156 return (nchr); 157 } 158 159 static size_t 160 _ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 161 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 162 { 163 const wchar_t *s; 164 size_t nchr; 165 166 if (dst == NULL) { 167 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 168 if (*s < 0 || *s > 127) { 169 errno = EILSEQ; 170 return ((size_t)-1); 171 } 172 } 173 return (s - *src); 174 } 175 176 s = *src; 177 nchr = 0; 178 while (len-- > 0 && nwc-- > 0) { 179 if (*s < 0 || *s > 127) { 180 errno = EILSEQ; 181 return ((size_t)-1); 182 } 183 if ((*dst++ = *s++) == '\0') { 184 *src = NULL; 185 return (nchr); 186 } 187 nchr++; 188 } 189 *src = s; 190 return (nchr); 191 } 192 193