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  * 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)
  39 static 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: src/lib/libc/locale/none.c,v 1.12 2004/07/21 10:54:57 tjr Exp $");
  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
  54 int     _none_init(_RuneLocale *);
  55 size_t  _none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
  56             mbstate_t * __restrict);
  57 int     _none_mbsinit(const mbstate_t *);
  58 size_t  _none_mbsnrtowcs(wchar_t * __restrict dst,
  59             const char ** __restrict src, size_t nms, size_t len,
  60             mbstate_t * __restrict ps __unused);
  61 size_t  _none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
  62 size_t  _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
  63             size_t, size_t, mbstate_t * __restrict);
  64
  65 int
  66 _none_init(_RuneLocale *rl)
  67 {
  68
  69         __mbrtowc = _none_mbrtowc;
  70         __mbsinit = _none_mbsinit;
  71         __mbsnrtowcs = _none_mbsnrtowcs;
  72         __wcrtomb = _none_wcrtomb;
  73         __wcsnrtombs = _none_wcsnrtombs;
  74         _CurrentRuneLocale = rl;
  75         __mb_cur_max = 1;
  76         return(0);
  77 }
  78
  79 int
  80 _none_mbsinit(const mbstate_t *ps __unused)
  81 {
  82
  83         /*
  84          * Encoding is not state dependent - we are always in the
  85          * initial state.
  86          */
  87         return (1);
  88 }
  89
  90 size_t
  91 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  92     mbstate_t * __restrict ps __unused)
  93 {
  94
  95         if (s == NULL)
  96                 /* Reset to initial shift state (no-op) */
  97                 return (0);
  98         if (n == 0)
  99                 /* Incomplete multibyte sequence */
 100                 return ((size_t)-2);
 101         if (pwc != NULL)
 102                 *pwc = (unsigned char)*s;
 103         return (*s == '\0' ? 0 : 1);
 104 }
 105
 106 size_t
 107 _none_wcrtomb(char * __restrict s, wchar_t wc,
 108     mbstate_t * __restrict ps __unused)
 109 {
 110
 111         if (s == NULL)
 112                 /* Reset to initial shift state (no-op) */
 113                 return (1);
 114         if (wc < 0 || wc > UCHAR_MAX) {
 115                 errno = EILSEQ;
 116                 return ((size_t)-1);
 117         }
 118         *s = (unsigned char)wc;
 119         return (1);
 120 }
 121
 122 size_t
 123 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
 124     size_t nms, size_t len, mbstate_t * __restrict ps __unused)
 125 {
 126         const char *s;
 127         size_t nchr;
 128
 129         if (dst == NULL) {
 130                 s = memchr(*src, '\0', nms);
 131                 return (s != NULL ? s - *src : nms);
 132         }
 133
 134         s = *src;
 135         nchr = 0;
 136         while (len-- > 0 && nms-- > 0) {
 137                 if ((*dst++ = (unsigned char)*s++) == L'\0') {
 138                         *src = NULL;
 139                         return (nchr);
 140                 }
 141                 nchr++;
 142         }
 143         *src = s;
 144         return (nchr);
 145 }
 146
 147 size_t
 148 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
 149     size_t nwc, size_t len, mbstate_t * __restrict ps __unused)
 150 {
 151         const wchar_t *s;
 152         size_t nchr;
 153
 154         if (dst == NULL) {
 155                 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
 156                         if (*s < 0 || *s > UCHAR_MAX) {
 157                                 errno = EILSEQ;
 158                                 return ((size_t)-1);
 159                         }
 160                 }
 161                 return (s - *src);
 162         }
 163
 164         s = *src;
 165         nchr = 0;
 166         while (len-- > 0 && nwc-- > 0) {
 167                 if (*s < 0 || *s > UCHAR_MAX) {
 168                         errno = EILSEQ;
 169                         return ((size_t)-1);
 170                 }
 171                 if ((*dst++ = *s++) == '\0') {
 172                         *src = NULL;
 173                         return (nchr);
 174                 }
 175                 nchr++;
 176         }
 177         *src = s;
 178         return (nchr);
 179 }