locale/FreeBSD/none.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  * 4. 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
  41 #if defined(LIBC_SCCS) && !defined(lint)
  42 static char sccsid[] = "@(#)none.c      8.1 (Berkeley) 6/4/93";
  43 #endif /* LIBC_SCCS and not lint */
  44 #include <sys/cdefs.h>
  45 __FBSDID("$FreeBSD$");
  46
  47 #include "xlocale_private.h"
  48
  49 #include <errno.h>
  50 #include <limits.h>
  51 #include <runetype.h>
  52 #include <stddef.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <wchar.h>
  57 #include "mblocal.h"
  58
  59 /* setup defaults */
  60
  61 int __mb_cur_max = 1;
  62 int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */
  63
  64 int
  65 _none_init(struct __xlocale_st_runelocale *xrl)
  66 {
  67
  68         xrl->__mbrtowc = _none_mbrtowc;
  69         xrl->__mbsinit = _none_mbsinit;
  70         xrl->__mbsnrtowcs = _none_mbsnrtowcs;
  71         xrl->__wcrtomb = _none_wcrtomb;
  72         xrl->__wcsnrtombs = _none_wcsnrtombs;
  73         xrl->__mb_cur_max = 1;
  74         xrl->__mb_sb_limit = 256;
  75         return(0);
  76 }
  77
  78 int
  79 _none_mbsinit(const mbstate_t *ps __unused, locale_t loc __unused)
  80 {
  81
  82         /*
  83          * Encoding is not state dependent - we are always in the
  84          * initial state.
  85          */
  86         return (1);
  87 }
  88
  89 size_t
  90 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  91     mbstate_t * __restrict ps __unused, locale_t loc __unused)
  92 {
  93
  94         if (s == NULL)
  95                 /* Reset to initial shift state (no-op) */
  96                 return (0);
  97         if (n == 0)
  98                 /* Incomplete multibyte sequence */
  99                 return ((size_t)-2);
 100         if (pwc != NULL)
 101                 *pwc = (unsigned char)*s;
 102         return (*s == '\0' ? 0 : 1);
 103 }
 104
 105 size_t
 106 _none_wcrtomb(char * __restrict s, wchar_t wc,
 107     mbstate_t * __restrict ps __unused, locale_t loc __unused)
 108 {
 109
 110         if (s == NULL)
 111                 /* Reset to initial shift state (no-op) */
 112                 return (1);
 113         if (wc < 0 || wc > UCHAR_MAX) {
 114                 errno = EILSEQ;
 115                 return ((size_t)-1);
 116         }
 117         *s = (unsigned char)wc;
 118         return (1);
 119 }
 120
 121 size_t
 122 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
 123     size_t nms, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
 124 {
 125         const char *s;
 126         size_t nchr;
 127
 128         if (dst == NULL) {
 129                 s = memchr(*src, '\0', nms);
 130                 return (s != NULL ? s - *src : nms);
 131         }
 132
 133         s = *src;
 134         nchr = 0;
 135         while (len-- > 0 && nms-- > 0) {
 136                 if ((*dst++ = (unsigned char)*s++) == L'\0') {
 137                         *src = NULL;
 138                         return (nchr);
 139                 }
 140                 nchr++;
 141         }
 142         *src = s;
 143         return (nchr);
 144 }
 145
 146 size_t
 147 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
 148     size_t nwc, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
 149 {
 150         const wchar_t *s;
 151         size_t nchr;
 152
 153         if (dst == NULL) {
 154                 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
 155                         if (*s < 0 || *s > UCHAR_MAX) {
 156                                 errno = EILSEQ;
 157                                 return ((size_t)-1);
 158                         }
 159                 }
 160                 return (s - *src);
 161         }
 162
 163         s = *src;
 164         nchr = 0;
 165         while (len-- > 0 && nwc-- > 0) {
 166                 if (*s < 0 || *s > UCHAR_MAX) {
 167                         *src = s;
 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 }