locale/FreeBSD/mskanji.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 1.18 2007/10/13 16:28:22 ache Exp $");
  41
  42 #include "xlocale_private.h"
  43
  44 #include <sys/types.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 static size_t   _MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict,
  53                     size_t, mbstate_t * __restrict, locale_t);
  54 static int      _MSKanji_mbsinit(const mbstate_t *, locale_t);
  55 static size_t   _MSKanji_wcrtomb(char * __restrict, wchar_t,
  56                     mbstate_t * __restrict, locale_t);
  57
  58 typedef struct {
  59         wchar_t ch;
  60 } _MSKanjiState;
  61
  62 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         xrl->__mb_sb_limit = 256;
  71         return (0);
  72 }
  73
  74 static int
  75 _MSKanji_mbsinit(const mbstate_t *ps, locale_t loc __unused)
  76 {
  77
  78         return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
  79 }
  80
  81 static size_t
  82 _MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  83     mbstate_t * __restrict ps, locale_t loc __unused)
  84 {
  85         _MSKanjiState *ms;
  86         wchar_t wc;
  87
  88         ms = (_MSKanjiState *)ps;
  89
  90         if ((ms->ch & ~0xFF) != 0) {
  91                 /* Bad conversion state. */
  92                 errno = EINVAL;
  93                 return ((size_t)-1);
  94         }
  95
  96         if (s == NULL) {
  97                 s = "";
  98                 n = 1;
  99                 pwc = NULL;
 100         }
 101
 102         if (n == 0)
 103                 /* Incomplete multibyte sequence */
 104                 return ((size_t)-2);
 105
 106         if (ms->ch != 0) {
 107                 if (*s == '\0') {
 108                         errno = EILSEQ;
 109                         return ((size_t)-1);
 110                 }
 111                 wc = (ms->ch << 8) | (*s & 0xFF);
 112                 if (pwc != NULL)
 113                         *pwc = wc;
 114                 ms->ch = 0;
 115                 return (1);
 116         }
 117         wc = *s++ & 0xff;
 118         if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
 119                 if (n < 2) {
 120                         /* Incomplete multibyte sequence */
 121                         ms->ch = wc;
 122                         return ((size_t)-2);
 123                 }
 124                 if (*s == '\0') {
 125                         errno = EILSEQ;
 126                         return ((size_t)-1);
 127                 }
 128                 wc = (wc << 8) | (*s++ & 0xff);
 129                 if (pwc != NULL)
 130                         *pwc = wc;
 131                 return (2);
 132         } else {
 133                 if (pwc != NULL)
 134                         *pwc = wc;
 135                 return (wc == L'\0' ? 0 : 1);
 136         }
 137 }
 138
 139 static size_t
 140 _MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps, locale_t loc __unused)
 141 {
 142         _MSKanjiState *ms;
 143         int len, i;
 144
 145         ms = (_MSKanjiState *)ps;
 146
 147         if (ms->ch != 0) {
 148                 errno = EINVAL;
 149                 return ((size_t)-1);
 150         }
 151
 152         if (s == NULL)
 153                 /* Reset to initial shift state (no-op) */
 154                 return (1);
 155         len = (wc > 0x100) ? 2 : 1;
 156         for (i = len; i-- > 0; )
 157                 *s++ = wc >> (i << 3);
 158         return (len);
 159 }