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  * 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 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD: src/lib/libc/locale/ascii.c,v 1.1 2008/01/21 23:48:12 ache Exp $");
  36
  37 #include <errno.h>
  38 #include <limits.h>
  39 #include <runetype.h>
  40 #include <stddef.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <wchar.h>
  45 #include "mblocal.h"
  46
  47 static size_t   _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict,
  48                     size_t, mbstate_t * __restrict);
  49 static int      _ascii_mbsinit(const mbstate_t *);
  50 static size_t   _ascii_mbsnrtowcs(wchar_t * __restrict dst,
  51                     const char ** __restrict src, size_t nms, size_t len,
  52                     mbstate_t * __restrict ps __unused);
  53 static size_t   _ascii_wcrtomb(char * __restrict, wchar_t,
  54                     mbstate_t * __restrict);
  55 static size_t   _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
  56                     size_t, size_t, mbstate_t * __restrict);
  57
  58 int
  59 _ascii_init(_RuneLocale *rl)
  60 {
  61
  62         __mbrtowc = _ascii_mbrtowc;
  63         __mbsinit = _ascii_mbsinit;
  64         __mbsnrtowcs = _ascii_mbsnrtowcs;
  65         __wcrtomb = _ascii_wcrtomb;
  66         __wcsnrtombs = _ascii_wcsnrtombs;
  67         _CurrentRuneLocale = rl;
  68         __mb_cur_max = 1;
  69         __mb_sb_limit = 128;
  70         return(0);
  71 }
  72
  73 static int
  74 _ascii_mbsinit(const mbstate_t *ps __unused)
  75 {
  76
  77         /*
  78          * Encoding is not state dependent - we are always in the
  79          * initial state.
  80          */
  81         return (1);
  82 }
  83
  84 static size_t
  85 _ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  86     mbstate_t * __restrict ps __unused)
  87 {
  88
  89         if (s == NULL)
  90                 /* Reset to initial shift state (no-op) */
  91                 return (0);
  92         if (n == 0)
  93                 /* Incomplete multibyte sequence */
  94                 return ((size_t)-2);
  95         if (*s & 0x80) {
  96                 errno = EILSEQ;
  97                 return ((size_t)-1);
  98         }
  99         if (pwc != NULL)
 100                 *pwc = (unsigned char)*s;
 101         return (*s == '\0' ? 0 : 1);
 102 }
 103
 104 static size_t
 105 _ascii_wcrtomb(char * __restrict s, wchar_t wc,
 106     mbstate_t * __restrict ps __unused)
 107 {
 108
 109         if (s == NULL)
 110                 /* Reset to initial shift state (no-op) */
 111                 return (1);
 112         if (wc < 0 || wc > 127) {
 113                 errno = EILSEQ;
 114                 return ((size_t)-1);
 115         }
 116         *s = (unsigned char)wc;
 117         return (1);
 118 }
 119
 120 static size_t
 121 _ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
 122     size_t nms, size_t len, mbstate_t * __restrict ps __unused)
 123 {
 124         const char *s;
 125         size_t nchr;
 126
 127         if (dst == NULL) {
 128                 for (s = *src; nms > 0 && *s != '\0'; s++, nms--) {
 129                         if (*s & 0x80) {
 130                                 errno = EILSEQ;
 131                                 return ((size_t)-1);
 132                         }
 133                 }
 134                 return (s - *src);
 135         }
 136
 137         s = *src;
 138         nchr = 0;
 139         while (len-- > 0 && nms-- > 0) {
 140                 if (*s & 0x80) {
 141                         errno = EILSEQ;
 142                         return ((size_t)-1);
 143                 }
 144                 if ((*dst++ = (unsigned char)*s++) == L'\0') {
 145                         *src = NULL;
 146                         return (nchr);
 147                 }
 148                 nchr++;
 149         }
 150         *src = s;
 151         return (nchr);
 152 }
 153
 154 static size_t
 155 _ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
 156     size_t nwc, size_t len, mbstate_t * __restrict ps __unused)
 157 {
 158         const wchar_t *s;
 159         size_t nchr;
 160
 161         if (dst == NULL) {
 162                 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
 163                         if (*s < 0 || *s > 127) {
 164                                 errno = EILSEQ;
 165                                 return ((size_t)-1);
 166                         }
 167                 }
 168                 return (s - *src);
 169         }
 170
 171         s = *src;
 172         nchr = 0;
 173         while (len-- > 0 && nwc-- > 0) {
 174                 if (*s < 0 || *s > 127) {
 175                         errno = EILSEQ;
 176                         return ((size_t)-1);
 177                 }
 178                 if ((*dst++ = *s++) == '\0') {
 179                         *src = NULL;
 180                         return (nchr);
 181                 }
 182                 nchr++;
 183         }
 184         *src = s;
 185         return (nchr);
 186 }
 187