locale/FreeBSD/ascii.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  * Copyright (c) 2011 The FreeBSD Foundation
  10  * All rights reserved.
  11  * Portions of this software were developed by David Chisnall
  12  * under sponsorship from the FreeBSD Foundation.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  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 static size_t   _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict,
  53                     size_t, mbstate_t * __restrict, locale_t);
  54 static int      _ascii_mbsinit(const mbstate_t *, locale_t);
  55 static size_t   _ascii_mbsnrtowcs(wchar_t * __restrict dst,
  56                     const char ** __restrict src, size_t nms, size_t len,
  57                     mbstate_t * __restrict ps __unused, locale_t);
  58 static size_t   _ascii_wcrtomb(char * __restrict, wchar_t,
  59                     mbstate_t * __restrict, locale_t);
  60 static size_t   _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
  61                     size_t, size_t, mbstate_t * __restrict, locale_t);
  62
  63 int
  64 _ascii_init(struct __xlocale_st_runelocale *xrl)
  65 {
  66
  67         xrl->__mbrtowc = _ascii_mbrtowc;
  68         xrl->__mbsinit = _ascii_mbsinit;
  69         xrl->__mbsnrtowcs = _ascii_mbsnrtowcs;
  70         xrl->__wcrtomb = _ascii_wcrtomb;
  71         xrl->__wcsnrtombs = _ascii_wcsnrtombs;
  72         xrl->__mb_cur_max = 1;
  73         xrl->__mb_sb_limit = 128;
  74         return(0);
  75 }
  76
  77 static int
  78 _ascii_mbsinit(const mbstate_t *ps __unused, locale_t loc __unused)
  79 {
  80
  81         /*
  82          * Encoding is not state dependent - we are always in the
  83          * initial state.
  84          */
  85         return (1);
  86 }
  87
  88 static size_t
  89 _ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  90     mbstate_t * __restrict ps __unused, locale_t loc __unused)
  91 {
  92
  93         if (s == NULL)
  94                 /* Reset to initial shift state (no-op) */
  95                 return (0);
  96         if (n == 0)
  97                 /* Incomplete multibyte sequence */
  98                 return ((size_t)-2);
  99         if (*s & 0x80) {
 100                 errno = EILSEQ;
 101                 return ((size_t)-1);
 102         }
 103         if (pwc != NULL)
 104                 *pwc = (unsigned char)*s;
 105         return (*s == '\0' ? 0 : 1);
 106 }
 107
 108 static size_t
 109 _ascii_wcrtomb(char * __restrict s, wchar_t wc,
 110     mbstate_t * __restrict ps __unused, locale_t loc __unused)
 111 {
 112
 113         if (s == NULL)
 114                 /* Reset to initial shift state (no-op) */
 115                 return (1);
 116         if (wc < 0 || wc > 127) {
 117                 errno = EILSEQ;
 118                 return ((size_t)-1);
 119         }
 120         *s = (unsigned char)wc;
 121         return (1);
 122 }
 123
 124 static size_t
 125 _ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
 126     size_t nms, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
 127 {
 128         const char *s;
 129         size_t nchr;
 130
 131         if (dst == NULL) {
 132                 for (s = *src; nms > 0 && *s != '\0'; s++, nms--) {
 133                         if (*s & 0x80) {
 134                                 errno = EILSEQ;
 135                                 return ((size_t)-1);
 136                         }
 137                 }
 138                 return (s - *src);
 139         }
 140
 141         s = *src;
 142         nchr = 0;
 143         while (len-- > 0 && nms-- > 0) {
 144                 if (*s & 0x80) {
 145                         *src = s;
 146                         errno = EILSEQ;
 147                         return ((size_t)-1);
 148                 }
 149                 if ((*dst++ = (unsigned char)*s++) == L'\0') {
 150                         *src = NULL;
 151                         return (nchr);
 152                 }
 153                 nchr++;
 154         }
 155         *src = s;
 156         return (nchr);
 157 }
 158
 159 static size_t
 160 _ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
 161     size_t nwc, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
 162 {
 163         const wchar_t *s;
 164         size_t nchr;
 165
 166         if (dst == NULL) {
 167                 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
 168                         if (*s < 0 || *s > 127) {
 169                                 errno = EILSEQ;
 170                                 return ((size_t)-1);
 171                         }
 172                 }
 173                 return (s - *src);
 174         }
 175
 176         s = *src;
 177         nchr = 0;
 178         while (len-- > 0 && nwc-- > 0) {
 179                 if (*s < 0 || *s > 127) {
 180                         *src = s;
 181                         errno = EILSEQ;
 182                         return ((size_t)-1);
 183                 }
 184                 if ((*dst++ = *s++) == '\0') {
 185                         *src = NULL;
 186                         return (nchr);
 187                 }
 188                 nchr++;
 189         }
 190         *src = s;
 191         return (nchr);
 192 }
 193