lib/libc/locale/ascii.c

   1 /*
   2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
   5  * Copyright (c) 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Paul Borman at Krystal Technologies.
  10  *
  11  * Copyright (c) 2011 The FreeBSD Foundation
  12  * All rights reserved.
  13  * Portions of this software were developed by David Chisnall
  14  * under sponsorship from the FreeBSD Foundation.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  * @(#)none.c   8.1 (Berkeley) 6/4/93
  41  */
  42
  43 #include <errno.h>
  44 #include <limits.h>
  45 #include <runetype.h>
  46 #include <stddef.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <wchar.h>
  51 #include "mblocal.h"
  52
  53 static size_t   _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict,
  54                     size_t, mbstate_t * __restrict);
  55 static int      _ascii_mbsinit(const mbstate_t *);
  56 static size_t   _ascii_mbsnrtowcs(wchar_t * __restrict dst,
  57                     const char ** __restrict src, size_t nms, size_t len,
  58                     mbstate_t * __restrict ps __unused);
  59 static size_t   _ascii_wcrtomb(char * __restrict, wchar_t,
  60                     mbstate_t * __restrict);
  61 static size_t   _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
  62                     size_t, size_t, mbstate_t * __restrict);
  63
  64 int
  65 _ascii_init(struct xlocale_ctype *l, _RuneLocale *rl)
  66 {
  67
  68         l->__mbrtowc = _ascii_mbrtowc;
  69         l->__mbsinit = _ascii_mbsinit;
  70         l->__mbsnrtowcs = _ascii_mbsnrtowcs;
  71         l->__wcrtomb = _ascii_wcrtomb;
  72         l->__wcsnrtombs = _ascii_wcsnrtombs;
  73         l->runes = rl;
  74         l->__mb_cur_max = 1;
  75         l->__mb_sb_limit = 128;
  76         return(0);
  77 }
  78
  79 static int
  80 _ascii_mbsinit(const mbstate_t *ps __unused)
  81 {
  82         /*
  83          * Encoding is not state dependent - we are always in the
  84          * initial state.
  85          */
  86         return (1);
  87 }
  88
  89 static size_t
  90 _ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  91     mbstate_t * __restrict ps __unused)
  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)
 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)
 127 {
 128         const char *s;
 129         size_t nchr;
 130
 131         if (dst == NULL) {
 132                 s = *src;
 133                 while (*s != '\0' && nms-- > 0) {
 134                         if (*s & 0x80) {
 135                                 errno = EILSEQ;
 136                                 return ((size_t)-1);
 137                         }
 138                         ++s;
 139                 }
 140                 return (s - *src);
 141         }
 142
 143         s = *src;
 144         nchr = 0;
 145         while (len-- > 0 && nms-- > 0) {
 146                 if (*s & 0x80) {
 147                         *src = s;
 148                         errno = EILSEQ;
 149                         return ((size_t)-1);
 150                 }
 151                 if ((*dst++ = (unsigned char)*s++) == L'\0') {
 152                         *src = NULL;
 153                         return (nchr);
 154                 }
 155                 nchr++;
 156         }
 157         *src = s;
 158         return (nchr);
 159 }
 160
 161 static size_t
 162 _ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
 163     size_t nwc, size_t len, mbstate_t * __restrict ps __unused)
 164 {
 165         const wchar_t *s;
 166         size_t nchr;
 167
 168         if (dst == NULL) {
 169                 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
 170                         if (*s < 0 || *s > 127) {
 171                                 errno = EILSEQ;
 172                                 return ((size_t)-1);
 173                         }
 174                 }
 175                 return (s - *src);
 176         }
 177
 178         s = *src;
 179         nchr = 0;
 180         while (len-- > 0 && nwc-- > 0) {
 181                 if (*s < 0 || *s > 127) {
 182                         *src = s;
 183                         errno = EILSEQ;
 184                         return ((size_t)-1);
 185                 }
 186                 if ((*dst++ = *s++) == '\0') {
 187                         *src = NULL;
 188                         return (nchr);
 189                 }
 190                 nchr++;
 191         }
 192         *src = s;
 193         return (nchr);
 194 }