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) 35static 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: src/lib/libc/locale/none.c,v 1.15 2007/10/13 16:28:22 ache Exp $"); 39 40#include "xlocale_private.h" 41 42#include <errno.h> 43#include <limits.h> 44#include <runetype.h> 45#include <stddef.h> 46#include <stdio.h> 47#include <stdlib.h> 48#include <string.h> 49#include <wchar.h> 50#include "mblocal.h" 51 52/* setup defaults */ 53 54int __mb_cur_max = 1; 55int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */ 56 57int 58_none_init(struct __xlocale_st_runelocale *xrl) 59{ 60 61 xrl->__mbrtowc = _none_mbrtowc; 62 xrl->__mbsinit = _none_mbsinit; 63 xrl->__mbsnrtowcs = _none_mbsnrtowcs; 64 xrl->__wcrtomb = _none_wcrtomb; 65 xrl->__wcsnrtombs = _none_wcsnrtombs; 66 xrl->__mb_cur_max = 1; 67 xrl->__mb_sb_limit = 256; 68 return(0); 69} 70 71int 72_none_mbsinit(const mbstate_t *ps __unused, locale_t loc __unused) 73{ 74 75 /* 76 * Encoding is not state dependent - we are always in the 77 * initial state. 78 */ 79 return (1); 80} 81 82size_t 83_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 84 mbstate_t * __restrict ps __unused, locale_t loc __unused) 85{ 86 87 if (s == NULL) 88 /* Reset to initial shift state (no-op) */ 89 return (0); 90 if (n == 0) 91 /* Incomplete multibyte sequence */ 92 return ((size_t)-2); 93 if (pwc != NULL) 94 *pwc = (unsigned char)*s; 95 return (*s == '\0' ? 0 : 1); 96} 97 98size_t 99_none_wcrtomb(char * __restrict s, wchar_t wc, 100 mbstate_t * __restrict ps __unused, locale_t loc __unused) 101{ 102 103 if (s == NULL) 104 /* Reset to initial shift state (no-op) */ 105 return (1); 106 if (wc < 0 || wc > UCHAR_MAX) { 107 errno = EILSEQ; 108 return ((size_t)-1); 109 } 110 *s = (unsigned char)wc; 111 return (1); 112} 113 114size_t 115_none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 116 size_t nms, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused) 117{ 118 const char *s; 119 size_t nchr; 120 121 if (dst == NULL) { 122 s = memchr(*src, '\0', nms); 123 return (s != NULL ? s - *src : nms); 124 } 125 126 s = *src; 127 nchr = 0; 128 while (len-- > 0 && nms-- > 0) { 129 if ((*dst++ = (unsigned char)*s++) == L'\0') { 130 *src = NULL; 131 return (nchr); 132 } 133 nchr++; 134 } 135 *src = s; 136 return (nchr); 137} 138 139size_t 140_none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 141 size_t nwc, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused) 142{ 143 const wchar_t *s; 144 size_t nchr; 145 146 if (dst == NULL) { 147 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 148 if (*s < 0 || *s > UCHAR_MAX) { 149 errno = EILSEQ; 150 return ((size_t)-1); 151 } 152 } 153 return (s - *src); 154 } 155 156 s = *src; 157 nchr = 0; 158 while (len-- > 0 && nwc-- > 0) { 159 if (*s < 0 || *s > UCHAR_MAX) { 160 errno = EILSEQ; 161 return ((size_t)-1); 162 } 163 if ((*dst++ = *s++) == '\0') { 164 *src = NULL; 165 return (nchr); 166 } 167 nchr++; 168 } 169 *src = s; 170 return (nchr); 171} 172