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 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)none.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <errno.h> 41 #include <limits.h> 42 #include <runetype.h> 43 #include <stddef.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <wchar.h> 48 #include "mblocal.h" 49 50 static size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict, 51 size_t, mbstate_t * __restrict); 52 static int _none_mbsinit(const mbstate_t *); 53 static size_t _none_mbsnrtowcs(wchar_t * __restrict dst, 54 const char ** __restrict src, size_t nms, size_t len, 55 mbstate_t * __restrict ps __unused); 56 static size_t _none_wcrtomb(char * __restrict, wchar_t, 57 mbstate_t * __restrict); 58 static size_t _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 59 size_t, size_t, mbstate_t * __restrict); 60 61 /* setup defaults */ 62 63 int __mb_cur_max = 1; 64 int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */ 65 66 int 67 _none_init(_RuneLocale *rl) 68 { 69 70 __mbrtowc = _none_mbrtowc; 71 __mbsinit = _none_mbsinit; 72 __mbsnrtowcs = _none_mbsnrtowcs; 73 __wcrtomb = _none_wcrtomb; 74 __wcsnrtombs = _none_wcsnrtombs; 75 _CurrentRuneLocale = rl; 76 __mb_cur_max = 1; 77 __mb_sb_limit = 256; 78 return(0); 79 } 80 81 static int 82 _none_mbsinit(const mbstate_t *ps __unused) 83 { 84 85 /* 86 * Encoding is not state dependent - we are always in the 87 * initial state. 88 */ 89 return (1); 90 } 91 92 static size_t 93 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 94 mbstate_t * __restrict ps __unused) 95 { 96 97 if (s == NULL) 98 /* Reset to initial shift state (no-op) */ 99 return (0); 100 if (n == 0) 101 /* Incomplete multibyte sequence */ 102 return ((size_t)-2); 103 if (pwc != NULL) 104 *pwc = (unsigned char)*s; 105 return (*s == '\0' ? 0 : 1); 106 } 107 108 static size_t 109 _none_wcrtomb(char * __restrict s, wchar_t wc, 110 mbstate_t * __restrict ps __unused) 111 { 112 113 if (s == NULL) 114 /* Reset to initial shift state (no-op) */ 115 return (1); 116 if (wc < 0 || wc > UCHAR_MAX) { 117 errno = EILSEQ; 118 return ((size_t)-1); 119 } 120 *s = (unsigned char)wc; 121 return (1); 122 } 123 124 static size_t 125 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 126 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 127 { 128 const char *s; 129 size_t nchr; 130 131 if (dst == NULL) { 132 s = memchr(*src, '\0', nms); 133 return (s != NULL ? s - *src : nms); 134 } 135 136 s = *src; 137 nchr = 0; 138 while (len-- > 0 && nms-- > 0) { 139 if ((*dst++ = (unsigned char)*s++) == L'\0') { 140 *src = NULL; 141 return (nchr); 142 } 143 nchr++; 144 } 145 *src = s; 146 return (nchr); 147 } 148 149 static size_t 150 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 151 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 152 { 153 const wchar_t *s; 154 size_t nchr; 155 156 if (dst == NULL) { 157 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 158 if (*s < 0 || *s > UCHAR_MAX) { 159 errno = EILSEQ; 160 return ((size_t)-1); 161 } 162 } 163 return (s - *src); 164 } 165 166 s = *src; 167 nchr = 0; 168 while (len-- > 0 && nwc-- > 0) { 169 if (*s < 0 || *s > UCHAR_MAX) { 170 errno = EILSEQ; 171 return ((size_t)-1); 172 } 173 if ((*dst++ = *s++) == '\0') { 174 *src = NULL; 175 return (nchr); 176 } 177 nchr++; 178 } 179 *src = s; 180 return (nchr); 181 } 182 183 /* setup defaults */ 184 185 size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict, size_t, 186 mbstate_t * __restrict) = _none_mbrtowc; 187 int (*__mbsinit)(const mbstate_t *) = _none_mbsinit; 188 size_t (*__mbsnrtowcs)(wchar_t * __restrict, const char ** __restrict, 189 size_t, size_t, mbstate_t * __restrict) = _none_mbsnrtowcs; 190 size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict) = 191 _none_wcrtomb; 192 size_t (*__wcsnrtombs)(char * __restrict, const wchar_t ** __restrict, 193 size_t, size_t, mbstate_t * __restrict) = _none_wcsnrtombs; 194 195