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#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: src/lib/libc/locale/ascii.c,v 1.1 2008/01/21 23:48:12 ache Exp $"); 36 37#include <errno.h> 38#include <limits.h> 39#include <runetype.h> 40#include <stddef.h> 41#include <stdio.h> 42#include <stdlib.h> 43#include <string.h> 44#include <wchar.h> 45#include "mblocal.h" 46 47static size_t _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict, 48 size_t, mbstate_t * __restrict, locale_t); 49static int _ascii_mbsinit(const mbstate_t *, locale_t); 50static size_t _ascii_mbsnrtowcs(wchar_t * __restrict dst, 51 const char ** __restrict src, size_t nms, size_t len, 52 mbstate_t * __restrict ps __unused, locale_t); 53static size_t _ascii_wcrtomb(char * __restrict, wchar_t, 54 mbstate_t * __restrict, locale_t); 55static size_t _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 56 size_t, size_t, mbstate_t * __restrict, locale_t); 57 58int 59_ascii_init(struct __xlocale_st_runelocale *xrl) 60{ 61 62 xrl->__mbrtowc = _ascii_mbrtowc; 63 xrl->__mbsinit = _ascii_mbsinit; 64 xrl->__mbsnrtowcs = _ascii_mbsnrtowcs; 65 xrl->__wcrtomb = _ascii_wcrtomb; 66 xrl->__wcsnrtombs = _ascii_wcsnrtombs; 67 xrl->__mb_cur_max = 1; 68 xrl->__mb_sb_limit = 128; 69 return(0); 70} 71 72static int 73_ascii_mbsinit(const mbstate_t *ps __unused, locale_t loc __unused) 74{ 75 76 /* 77 * Encoding is not state dependent - we are always in the 78 * initial state. 79 */ 80 return (1); 81} 82 83static size_t 84_ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 85 mbstate_t * __restrict ps __unused, locale_t loc __unused) 86{ 87 88 if (s == NULL) 89 /* Reset to initial shift state (no-op) */ 90 return (0); 91 if (n == 0) 92 /* Incomplete multibyte sequence */ 93 return ((size_t)-2); 94 if (*s & 0x80) { 95 errno = EILSEQ; 96 return ((size_t)-1); 97 } 98 if (pwc != NULL) 99 *pwc = (unsigned char)*s; 100 return (*s == '\0' ? 0 : 1); 101} 102 103static size_t 104_ascii_wcrtomb(char * __restrict s, wchar_t wc, 105 mbstate_t * __restrict ps __unused, locale_t loc __unused) 106{ 107 108 if (s == NULL) 109 /* Reset to initial shift state (no-op) */ 110 return (1); 111 if (wc < 0 || wc > 127) { 112 errno = EILSEQ; 113 return ((size_t)-1); 114 } 115 *s = (unsigned char)wc; 116 return (1); 117} 118 119static size_t 120_ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 121 size_t nms, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused) 122{ 123 const char *s; 124 size_t nchr; 125 126 if (dst == NULL) { 127 for (s = *src; nms > 0 && *s != '\0'; s++, nms--) { 128 if (*s & 0x80) { 129 errno = EILSEQ; 130 return ((size_t)-1); 131 } 132 } 133 return (s - *src); 134 } 135 136 s = *src; 137 nchr = 0; 138 while (len-- > 0 && nms-- > 0) { 139 if (*s & 0x80) { 140 errno = EILSEQ; 141 return ((size_t)-1); 142 } 143 if ((*dst++ = (unsigned char)*s++) == L'\0') { 144 *src = NULL; 145 return (nchr); 146 } 147 nchr++; 148 } 149 *src = s; 150 return (nchr); 151} 152 153static size_t 154_ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 155 size_t nwc, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused) 156{ 157 const wchar_t *s; 158 size_t nchr; 159 160 if (dst == NULL) { 161 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 162 if (*s < 0 || *s > 127) { 163 errno = EILSEQ; 164 return ((size_t)-1); 165 } 166 } 167 return (s - *src); 168 } 169 170 s = *src; 171 nchr = 0; 172 while (len-- > 0 && nwc-- > 0) { 173 if (*s < 0 || *s > 127) { 174 errno = EILSEQ; 175 return ((size_t)-1); 176 } 177 if ((*dst++ = *s++) == '\0') { 178 *src = NULL; 179 return (nchr); 180 } 181 nchr++; 182 } 183 *src = s; 184 return (nchr); 185} 186 187