none.c revision 281927
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#if defined(LIBC_SCCS) && !defined(lint) 40static char sccsid[] = "@(#)none.c 8.1 (Berkeley) 6/4/93"; 41#endif /* LIBC_SCCS and not lint */ 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/lib/libc/locale/none.c 281927 2015-04-24 10:21:20Z theraven $"); 44 45#include <errno.h> 46#include <limits.h> 47#include <runetype.h> 48#include <stddef.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <string.h> 52#include <wchar.h> 53#include "mblocal.h" 54 55static size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict, 56 size_t, mbstate_t * __restrict); 57static int _none_mbsinit(const mbstate_t *); 58static size_t _none_mbsnrtowcs(wchar_t * __restrict dst, 59 const char ** __restrict src, size_t nms, size_t len, 60 mbstate_t * __restrict ps __unused); 61static size_t _none_wcrtomb(char * __restrict, wchar_t, 62 mbstate_t * __restrict); 63static size_t _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 64 size_t, size_t, mbstate_t * __restrict); 65 66/* setup defaults */ 67 68int __mb_cur_max = 1; 69int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */ 70 71int 72_none_init(struct xlocale_ctype *l, _RuneLocale *rl) 73{ 74 75 l->__mbrtowc = _none_mbrtowc; 76 l->__mbsinit = _none_mbsinit; 77 l->__mbsnrtowcs = _none_mbsnrtowcs; 78 l->__wcrtomb = _none_wcrtomb; 79 l->__wcsnrtombs = _none_wcsnrtombs; 80 l->runes = rl; 81 l->__mb_cur_max = 1; 82 l->__mb_sb_limit = 256; 83 return(0); 84} 85 86static int 87_none_mbsinit(const mbstate_t *ps __unused) 88{ 89 90 /* 91 * Encoding is not state dependent - we are always in the 92 * initial state. 93 */ 94 return (1); 95} 96 97static size_t 98_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 99 mbstate_t * __restrict ps __unused) 100{ 101 102 if (s == NULL) 103 /* Reset to initial shift state (no-op) */ 104 return (0); 105 if (n == 0) 106 /* Incomplete multibyte sequence */ 107 return ((size_t)-2); 108 if (pwc != NULL) 109 *pwc = (unsigned char)*s; 110 return (*s == '\0' ? 0 : 1); 111} 112 113static size_t 114_none_wcrtomb(char * __restrict s, wchar_t wc, 115 mbstate_t * __restrict ps __unused) 116{ 117 118 if (s == NULL) 119 /* Reset to initial shift state (no-op) */ 120 return (1); 121 if (wc < 0 || wc > UCHAR_MAX) { 122 errno = EILSEQ; 123 return ((size_t)-1); 124 } 125 *s = (unsigned char)wc; 126 return (1); 127} 128 129static size_t 130_none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 131 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 132{ 133 const char *s; 134 size_t nchr; 135 136 if (dst == NULL) { 137 s = memchr(*src, '\0', nms); 138 return (s != NULL ? s - *src : nms); 139 } 140 141 s = *src; 142 nchr = 0; 143 while (len-- > 0 && nms-- > 0) { 144 if ((*dst++ = (unsigned char)*s++) == L'\0') { 145 *src = NULL; 146 return (nchr); 147 } 148 nchr++; 149 } 150 *src = s; 151 return (nchr); 152} 153 154static size_t 155_none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 156 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 157{ 158 const wchar_t *s; 159 size_t nchr; 160 161 if (dst == NULL) { 162 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 163 if (*s < 0 || *s > UCHAR_MAX) { 164 errno = EILSEQ; 165 return ((size_t)-1); 166 } 167 } 168 return (s - *src); 169 } 170 171 s = *src; 172 nchr = 0; 173 while (len-- > 0 && nwc-- > 0) { 174 if (*s < 0 || *s > UCHAR_MAX) { 175 errno = EILSEQ; 176 return ((size_t)-1); 177 } 178 if ((*dst++ = *s++) == '\0') { 179 *src = NULL; 180 return (nchr); 181 } 182 nchr++; 183 } 184 *src = s; 185 return (nchr); 186} 187 188/* setup defaults */ 189 190size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict, size_t, 191 mbstate_t * __restrict) = _none_mbrtowc; 192int (*__mbsinit)(const mbstate_t *) = _none_mbsinit; 193size_t (*__mbsnrtowcs)(wchar_t * __restrict, const char ** __restrict, 194 size_t, size_t, mbstate_t * __restrict) = _none_mbsnrtowcs; 195size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict) = 196 _none_wcrtomb; 197size_t (*__wcsnrtombs)(char * __restrict, const wchar_t ** __restrict, 198 size_t, size_t, mbstate_t * __restrict) = _none_wcsnrtombs; 199 200struct xlocale_ctype __xlocale_global_ctype = { 201 {{0}, "C"}, 202 (_RuneLocale*)&_DefaultRuneLocale, 203 _none_mbrtowc, 204 _none_mbsinit, 205 _none_mbsnrtowcs, 206 _none_wcrtomb, 207 _none_wcsnrtombs, 208 1, /* __mb_cur_max, */ 209 256 /* __mb_sb_limit */ 210}; 211 212struct xlocale_ctype __xlocale_C_ctype = { 213 {{0}, "C"}, 214 (_RuneLocale*)&_DefaultRuneLocale, 215 _none_mbrtowc, 216 _none_mbsinit, 217 _none_mbsnrtowcs, 218 _none_wcrtomb, 219 _none_wcsnrtombs, 220 1, /* __mb_cur_max, */ 221 256 /* __mb_sb_limit */ 222}; 223