compiler/clib/locale/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 <sys/types.h>
  43 #include <errno.h>
  44 #include <runetype.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <wchar.h>
  48 #include "mblocal.h"
  49
  50 extern int __mb_sb_limit;
  51
  52 static size_t   _MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict,
  53                     size_t, mbstate_t * __restrict);
  54 static int      _MSKanji_mbsinit(const mbstate_t *);
  55 static size_t   _MSKanji_wcrtomb(char * __restrict, wchar_t,
  56                     mbstate_t * __restrict);
  57
  58 typedef struct {
  59         wchar_t ch;
  60 } _MSKanjiState;
  61
  62 int
  63 _MSKanji_init(_RuneLocale *rl)
  64 {
  65
  66         __mbrtowc = _MSKanji_mbrtowc;
  67         __wcrtomb = _MSKanji_wcrtomb;
  68         __mbsinit = _MSKanji_mbsinit;
  69         _CurrentRuneLocale = rl;
  70         __mb_cur_max = 2;
  71         __mb_sb_limit = 256;
  72         return (0);
  73 }
  74
  75 static int
  76 _MSKanji_mbsinit(const mbstate_t *ps)
  77 {
  78
  79         return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
  80 }
  81
  82 static size_t
  83 _MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
  84     mbstate_t * __restrict ps)
  85 {
  86         _MSKanjiState *ms;
  87         wchar_t wc;
  88
  89         ms = (_MSKanjiState *)ps;
  90
  91         if ((ms->ch & ~0xFF) != 0) {
  92                 /* Bad conversion state. */
  93                 errno = EINVAL;
  94                 return ((size_t)-1);
  95         }
  96
  97         if (s == NULL) {
  98                 s = "";
  99                 n = 1;
 100                 pwc = NULL;
 101         }
 102
 103         if (n == 0)
 104                 /* Incomplete multibyte sequence */
 105                 return ((size_t)-2);
 106
 107         if (ms->ch != 0) {
 108                 if (*s == '\0') {
 109                         errno = EILSEQ;
 110                         return ((size_t)-1);
 111                 }
 112                 wc = (ms->ch << 8) | (*s & 0xFF);
 113                 if (pwc != NULL)
 114                         *pwc = wc;
 115                 ms->ch = 0;
 116                 return (1);
 117         }
 118         wc = *s++ & 0xff;
 119         if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
 120                 if (n < 2) {
 121                         /* Incomplete multibyte sequence */
 122                         ms->ch = wc;
 123                         return ((size_t)-2);
 124                 }
 125                 if (*s == '\0') {
 126                         errno = EILSEQ;
 127                         return ((size_t)-1);
 128                 }
 129                 wc = (wc << 8) | (*s++ & 0xff);
 130                 if (pwc != NULL)
 131                         *pwc = wc;
 132                 return (2);
 133         } else {
 134                 if (pwc != NULL)
 135                         *pwc = wc;
 136                 return (wc == L'\0' ? 0 : 1);
 137         }
 138 }
 139
 140 static size_t
 141 _MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
 142 {
 143         _MSKanjiState *ms;
 144         int len, i;
 145
 146         ms = (_MSKanjiState *)ps;
 147
 148         if (ms->ch != 0) {
 149                 errno = EINVAL;
 150                 return ((size_t)-1);
 151         }
 152
 153         if (s == NULL)
 154                 /* Reset to initial shift state (no-op) */
 155                 return (1);
 156         len = (wc > 0x100) ? 2 : 1;
 157         for (i = len; i-- > 0; )
 158                 *s++ = wc >> (i << 3);
 159         return (len);
 160 }