locale/mskanji-fbsd.c

   1 /*
   2  * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
   3  *
   4  *    ja_JP.SJIS locale table for BSD4.4/rune
   5  *    version 1.0
   6  *    (C) Sin'ichiro MIYATANI / Phase One, Inc
   7  *    May 12, 1995
   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 Phase One, Inc.
  20  * 4. The name of Phase One, Inc. may be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #if defined(LIBC_SCCS) && !defined(lint)
  37 static char sccsid[] = "@(#)mskanji.c   1.0 (Phase One) 5/5/95";
  38 #endif /* LIBC_SCCS and not lint */
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD: src/lib/libc/locale/mskanji.c,v 1.16 2004/05/14 15:40:47 tjr Exp $");
  41
  42 #include "xlocale_private.h"
  43
  44 #include <sys/param.h>
  45 #include <errno.h>
  46 #include <runetype.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <wchar.h>
  50 #include "mblocal.h"
  51
  52 __private_extern__ int  _MSKanji_init(struct __xlocale_st_runelocale *);
  53 static size_t   _MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
  54             mbstate_t * __restrict, locale_t);
  55 static int      _MSKanji_mbsinit(const mbstate_t *, locale_t);
  56 static size_t   _MSKanji_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict, locale_t);
  57
  58 typedef struct {
  59         wchar_t ch;
  60 } _MSKanjiState;
  61
  62 __private_extern__ int
  63 _MSKanji_init(struct __xlocale_st_runelocale *xrl)
  64 {
  65
  66         xrl->__mbrtowc = _MSKanji_mbrtowc;
  67         xrl->__wcrtomb = _MSKanji_wcrtomb;
  68         xrl->__mbsinit = _MSKanji_mbsinit;
  69         xrl->__mb_cur_max = 2;
  70         return (0);
  71 }
  72
  73 static int
  74 _MSKanji_mbsinit(const mbstate_t *ps, locale_t loc)
  75 {
  76
  77         return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
  78 }
  79
  80 static size_t
  81 _MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  82     mbstate_t * __restrict ps, locale_t loc)
  83 {
  84         _MSKanjiState *ms;
  85         wchar_t wc;
  86
  87         ms = (_MSKanjiState *)ps;
  88
  89         if ((ms->ch & ~0xFF) != 0) {
  90                 /* Bad conversion state. */
  91                 errno = EINVAL;
  92                 return ((size_t)-1);
  93         }
  94
  95         if (s == NULL) {
  96                 s = "";
  97                 n = 1;
  98                 pwc = NULL;
  99         }
 100
 101         if (n == 0)
 102                 /* Incomplete multibyte sequence */
 103                 return ((size_t)-2);
 104
 105         if (ms->ch != 0) {
 106                 if (*s == '\0') {
 107                         errno = EILSEQ;
 108                         return ((size_t)-1);
 109                 }
 110                 wc = (ms->ch << 8) | (*s & 0xFF);
 111                 if (pwc != NULL)
 112                         *pwc = wc;
 113                 ms->ch = 0;
 114                 return (1);
 115         }
 116         wc = *s++ & 0xff;
 117         if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
 118                 if (n < 2) {
 119                         /* Incomplete multibyte sequence */
 120                         ms->ch = wc;
 121                         return ((size_t)-2);
 122                 }
 123                 if (*s == '\0') {
 124                         errno = EILSEQ;
 125                         return ((size_t)-1);
 126                 }
 127                 wc = (wc << 8) | (*s++ & 0xff);
 128                 if (pwc != NULL)
 129                         *pwc = wc;
 130                 return (2);
 131         } else {
 132                 if (pwc != NULL)
 133                         *pwc = wc;
 134                 return (wc == L'\0' ? 0 : 1);
 135         }
 136 }
 137
 138 static size_t
 139 _MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps, locale_t loc)
 140 {
 141         _MSKanjiState *ms;
 142         int len, i;
 143
 144         ms = (_MSKanjiState *)ps;
 145
 146         if (ms->ch != 0) {
 147                 errno = EINVAL;
 148                 return ((size_t)-1);
 149         }
 150
 151         if (s == NULL)
 152                 /* Reset to initial shift state (no-op) */
 153                 return (1);
 154         len = (wc > 0x100) ? 2 : 1;
 155         for (i = len; i-- > 0; )
 156                 *s++ = wc >> (i << 3);
 157         return (len);
 158 }