none.c revision 129707
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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#if defined(LIBC_SCCS) && !defined(lint) 39static char sccsid[] = "@(#)none.c 8.1 (Berkeley) 6/4/93"; 40#endif /* LIBC_SCCS and not lint */ 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/lib/libc/locale/none.c 129707 2004-05-25 10:45:24Z tjr $"); 43 44#include <errno.h> 45#include <limits.h> 46#include <runetype.h> 47#include <stddef.h> 48#include <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <wchar.h> 52#include "mblocal.h" 53 54int _none_init(_RuneLocale *); 55size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t, 56 mbstate_t * __restrict); 57int _none_mbsinit(const mbstate_t *); 58size_t _none_mbsrtowcs(wchar_t * __restrict, const char ** __restrict, 59 size_t, mbstate_t * __restrict); 60size_t _none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict); 61size_t _none_wcsrtombs(char * __restrict, const wchar_t ** __restrict, 62 size_t, mbstate_t * __restrict); 63 64int 65_none_init(_RuneLocale *rl) 66{ 67 68 __mbrtowc = _none_mbrtowc; 69 __mbsinit = _none_mbsinit; 70 __mbsrtowcs = _none_mbsrtowcs; 71 __wcrtomb = _none_wcrtomb; 72 __wcsrtombs = _none_wcsrtombs; 73 _CurrentRuneLocale = rl; 74 __mb_cur_max = 1; 75 return(0); 76} 77 78int 79_none_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 89size_t 90_none_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 (pwc != NULL) 101 *pwc = (unsigned char)*s; 102 return (*s == '\0' ? 0 : 1); 103} 104 105size_t 106_none_wcrtomb(char * __restrict s, wchar_t wc, 107 mbstate_t * __restrict ps __unused) 108{ 109 110 if (s == NULL) 111 /* Reset to initial shift state (no-op) */ 112 return (1); 113 if (wc < 0 || wc > UCHAR_MAX) { 114 errno = EILSEQ; 115 return ((size_t)-1); 116 } 117 *s = (unsigned char)wc; 118 return (1); 119} 120 121size_t 122_none_mbsrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 123 size_t len, mbstate_t * __restrict ps __unused) 124{ 125 const char *s; 126 size_t nchr; 127 128 if (dst == NULL) 129 return (strlen(*src)); 130 131 s = *src; 132 nchr = 0; 133 while (len-- > 0) { 134 if ((*dst++ = (unsigned char)*s++) == L'\0') { 135 *src = NULL; 136 return (nchr); 137 } 138 nchr++; 139 } 140 *src = s; 141 return (nchr); 142} 143 144size_t 145_none_wcsrtombs(char * __restrict dst, const wchar_t ** __restrict src, 146 size_t len, mbstate_t * __restrict ps __unused) 147{ 148 const wchar_t *s; 149 size_t nchr; 150 151 if (dst == NULL) { 152 for (s = *src; *s != L'\0'; s++) { 153 if (*s < 0 || *s > UCHAR_MAX) { 154 errno = EILSEQ; 155 return ((size_t)-1); 156 } 157 } 158 return (s - *src); 159 } 160 161 s = *src; 162 nchr = 0; 163 while (len-- > 0) { 164 if (*s < 0 || *s > UCHAR_MAX) { 165 errno = EILSEQ; 166 return ((size_t)-1); 167 } 168 if ((*dst++ = *s++) == '\0') { 169 *src = NULL; 170 return (nchr); 171 } 172 nchr++; 173 } 174 *src = s; 175 return (nchr); 176} 177