locale/FreeBSD/none.c

   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: src/lib/libc/locale/none.c,v 1.15 2007/10/13 16:28:22 ache Exp $");
  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