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/param.h>
  40 __FBSDID("$FreeBSD: src/lib/libc/locale/mskanji.c,v 1.16 2004/05/14 15:40:47 tjr Exp $");
  41
  42 #include <errno.h>
  43 #include <runetype.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <wchar.h>
  47 #include "mblocal.h"
  48
  49 int     _MSKanji_init(_RuneLocale *);
  50 size_t  _MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
  51             mbstate_t * __restrict);
  52 int     _MSKanji_mbsinit(const mbstate_t *);
  53 size_t  _MSKanji_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
  54
  55 typedef struct {
  56         wchar_t ch;
  57 } _MSKanjiState;
  58
  59 int
  60 _MSKanji_init(_RuneLocale *rl)
  61 {
  62
  63         __mbrtowc = _MSKanji_mbrtowc;
  64         __wcrtomb = _MSKanji_wcrtomb;
  65         __mbsinit = _MSKanji_mbsinit;
  66         _CurrentRuneLocale = rl;
  67         __mb_cur_max = 2;
  68         return (0);
  69 }
  70
  71 int
  72 _MSKanji_mbsinit(const mbstate_t *ps)
  73 {
  74
  75         return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
  76 }
  77
  78 size_t
  79 _MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  80     mbstate_t * __restrict ps)
  81 {
  82         _MSKanjiState *ms;
  83         wchar_t wc;
  84
  85         ms = (_MSKanjiState *)ps;
  86
  87         if ((ms->ch & ~0xFF) != 0) {
  88                 /* Bad conversion state. */
  89                 errno = EINVAL;
  90                 return ((size_t)-1);
  91         }
  92
  93         if (s == NULL) {
  94                 s = "";
  95                 n = 1;
  96                 pwc = NULL;
  97         }
  98
  99         if (n == 0)
 100                 /* Incomplete multibyte sequence */
 101                 return ((size_t)-2);
 102
 103         if (ms->ch != 0) {
 104                 if (*s == '\0') {
 105                         errno = EILSEQ;
 106                         return ((size_t)-1);
 107                 }
 108                 wc = (ms->ch << 8) | (*s & 0xFF);
 109                 if (pwc != NULL)
 110                         *pwc = wc;
 111                 ms->ch = 0;
 112                 return (1);
 113         }
 114         wc = *s++ & 0xff;
 115         if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
 116                 if (n < 2) {
 117                         /* Incomplete multibyte sequence */
 118                         ms->ch = wc;
 119                         return ((size_t)-2);
 120                 }
 121                 if (*s == '\0') {
 122                         errno = EILSEQ;
 123                         return ((size_t)-1);
 124                 }
 125                 wc = (wc << 8) | (*s++ & 0xff);
 126                 if (pwc != NULL)
 127                         *pwc = wc;
 128                 return (2);
 129         } else {
 130                 if (pwc != NULL)
 131                         *pwc = wc;
 132                 return (wc == L'\0' ? 0 : 1);
 133         }
 134 }
 135
 136 size_t
 137 _MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
 138 {
 139         _MSKanjiState *ms;
 140         int len, i;
 141
 142         ms = (_MSKanjiState *)ps;
 143
 144         if (ms->ch != 0) {
 145                 errno = EINVAL;
 146                 return ((size_t)-1);
 147         }
 148
 149         if (s == NULL)
 150                 /* Reset to initial shift state (no-op) */
 151                 return (1);
 152         len = (wc > 0x100) ? 2 : 1;
 153         for (i = len; i-- > 0; )
 154                 *s++ = wc >> (i << 3);
 155         return (len);
 156 }