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 int 62 _none_init(_RuneLocale *rl) 63 { 64 65 __mbrtowc = _none_mbrtowc; 66 __mbsinit = _none_mbsinit; 67 __mbsnrtowcs = _none_mbsnrtowcs; 68 __wcrtomb = _none_wcrtomb; 69 __wcsnrtombs = _none_wcsnrtombs; 70 _CurrentRuneLocale = rl; 71 __mb_cur_max = 1; 72 return(0); 73 } 74 75 static int 76 _none_mbsinit(const mbstate_t *ps __unused) 77 { 78 79 /* 80 * Encoding is not state dependent - we are always in the 81 * initial state. 82 */ 83 return (1); 84 } 85 86 static size_t 87 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 88 mbstate_t * __restrict ps __unused) 89 { 90 91 if (s == NULL) 92 /* Reset to initial shift state (no-op) */ 93 return (0); 94 if (n == 0) 95 /* Incomplete multibyte sequence */ 96 return ((size_t)-2); 97 if (pwc != NULL) 98 *pwc = (unsigned char)*s; 99 return (*s == '\0' ? 0 : 1); 100 } 101 102 static size_t 103 _none_wcrtomb(char * __restrict s, wchar_t wc, 104 mbstate_t * __restrict ps __unused) 105 { 106 107 if (s == NULL) 108 /* Reset to initial shift state (no-op) */ 109 return (1); 110 if (wc < 0 || wc > UCHAR_MAX) { 111 errno = EILSEQ; 112 return ((size_t)-1); 113 } 114 *s = (unsigned char)wc; 115 return (1); 116 } 117 118 static size_t 119 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 120 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 121 { 122 const char *s; 123 size_t nchr; 124 125 if (dst == NULL) { 126 s = memchr(*src, '\0', nms); 127 return (s != NULL ? s - *src : nms); 128 } 129 130 s = *src; 131 nchr = 0; 132 while (len-- > 0 && nms-- > 0) { 133 if ((*dst++ = (unsigned char)*s++) == L'\0') { 134 *src = NULL; 135 return (nchr); 136 } 137 nchr++; 138 } 139 *src = s; 140 return (nchr); 141 } 142 143 static size_t 144 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 145 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 146 { 147 const wchar_t *s; 148 size_t nchr; 149 150 if (dst == NULL) { 151 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 152 if (*s < 0 || *s > UCHAR_MAX) { 153 errno = EILSEQ; 154 return ((size_t)-1); 155 } 156 } 157 return (s - *src); 158 } 159 160 s = *src; 161 nchr = 0; 162 while (len-- > 0 && nwc-- > 0) { 163 if (*s < 0 || *s > UCHAR_MAX) { 164 errno = EILSEQ; 165 return ((size_t)-1); 166 } 167 if ((*dst++ = *s++) == '\0') { 168 *src = NULL; 169 return (nchr); 170 } 171 nchr++; 172 } 173 *src = s; 174 return (nchr); 175 } 176 177 /* setup defaults */ 178 179 int __mb_cur_max = 1; 180 size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict, size_t, 181 mbstate_t * __restrict) = _none_mbrtowc; 182 int (*__mbsinit)(const mbstate_t *) = _none_mbsinit; 183 size_t (*__mbsnrtowcs)(wchar_t * __restrict, const char ** __restrict, 184 size_t, size_t, mbstate_t * __restrict) = _none_mbsnrtowcs; 185 size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict) = 186 _none_wcrtomb; 187 size_t (*__wcsnrtombs)(char * __restrict, const wchar_t ** __restrict, 188 size_t, size_t, mbstate_t * __restrict) = _none_wcsnrtombs; 189 190