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ruby--ruby/enc/shift_jis.c
akr 081c802cb9 * grapheme cluster implementation reverted. [ruby-dev:36375] 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19417 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2008-09-18 12:53:25 +00:00

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/**********************************************************************
sjis.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2007 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "regint.h"
static const int EncLen_SJIS[] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1
};
static const char SJIS_CAN_BE_TRAIL_TABLE[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0
};
#define SJIS_ISMB_FIRST(byte) (EncLen_SJIS[byte] > 1)
#define SJIS_ISMB_TRAIL(byte) SJIS_CAN_BE_TRAIL_TABLE[(byte)]
typedef enum { FAILURE = -2, ACCEPT = -1, S0 = 0, S1 } state_t;
#define A ACCEPT
#define F FAILURE
static const signed char trans[][0x100] = {
{ /* S0 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/* 0 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 1 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 2 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 3 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 4 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 5 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 6 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 7 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 8 */ F, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* 9 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* a */ F, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* b */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* c */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* d */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, F, F, F
},
{ /* S1 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 5 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 6 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 7 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, F,
/* 8 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 9 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* a */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* b */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* c */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* d */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* e */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* f */ A, A, A, A, A, A, A, A, A, A, A, A, A, F, F, F
}
};
#undef A
#undef F
static int
mbc_enc_len(const UChar* p, const UChar* e, OnigEncoding enc ARG_UNUSED)
{
int firstbyte = *p++;
state_t s;
s = trans[0][firstbyte];
if (s < 0) return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(1) :
ONIGENC_CONSTRUCT_MBCLEN_INVALID();
if (p == e) return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(EncLen_SJIS[firstbyte]-1);
s = trans[s][*p++];
return s == ACCEPT ? ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(2) :
ONIGENC_CONSTRUCT_MBCLEN_INVALID();
}
static int
code_to_mbclen(OnigCodePoint code, OnigEncoding enc ARG_UNUSED)
{
if (code < 256) {
if (EncLen_SJIS[(int )code] == 1)
return 1;
else
return 0;
}
else if (code <= 0xffff) {
return 2;
}
else
return ONIGERR_INVALID_CODE_POINT_VALUE;
}
static OnigCodePoint
mbc_to_code(const UChar* p, const UChar* end, OnigEncoding enc)
{
int c, i, len;
OnigCodePoint n;
len = enclen(enc, p, end);
c = *p++;
n = c;
if (len == 1) return n;
for (i = 1; i < len; i++) {
if (p >= end) break;
c = *p++;
n <<= 8; n += c;
}
return n;
}
static int
code_to_mbc(OnigCodePoint code, UChar *buf, OnigEncoding enc)
{
UChar *p = buf;
if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
*p++ = (UChar )(code & 0xff);
#if 0
if (enclen(enc, buf) != (p - buf))
return REGERR_INVALID_CODE_POINT_VALUE;
#endif
return p - buf;
}
static int
mbc_case_fold(OnigCaseFoldType flag,
const UChar** pp, const UChar* end, UChar* lower,
OnigEncoding enc)
{
const UChar* p = *pp;
if (ONIGENC_IS_MBC_ASCII(p)) {
*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
(*pp)++;
return 1;
}
else {
int i;
int len = enclen(enc, p, end);
for (i = 0; i < len; i++) {
*lower++ = *p++;
}
(*pp) += len;
return len; /* return byte length of converted char to lower */
}
}
#if 0
static int
is_mbc_ambiguous(OnigCaseFoldType flag,
const UChar** pp, const UChar* end)
{
return onigenc_mbn_is_mbc_ambiguous(enc, flag, pp, end);
}
#endif
#if 0
static int
is_code_ctype(OnigCodePoint code, unsigned int ctype)
{
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else {
if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
return (code_to_mbclen(code) > 1 ? TRUE : FALSE);
}
}
return FALSE;
}
#endif
static UChar*
left_adjust_char_head(const UChar* start, const UChar* s, const UChar* end, OnigEncoding enc)
{
const UChar *p;
int len;
if (s <= start) return (UChar* )s;
p = s;
if (SJIS_ISMB_TRAIL(*p)) {
while (p > start) {
if (! SJIS_ISMB_FIRST(*--p)) {
p++;
break;
}
}
}
len = enclen(enc, p, end);
if (p + len > s) return (UChar* )p;
p += len;
return (UChar* )(p + ((s - p) & ~1));
}
static int
is_allowed_reverse_match(const UChar* s, const UChar* end, OnigEncoding enc ARG_UNUSED)
{
const UChar c = *s;
return (SJIS_ISMB_TRAIL(c) ? FALSE : TRUE);
}
static int PropertyInited = 0;
static const OnigCodePoint** PropertyList;
static int PropertyListNum;
static int PropertyListSize;
static hash_table_type* PropertyNameTable;
static const OnigCodePoint CR_Hiragana[] = {
1,
0x829f, 0x82f1
}; /* CR_Hiragana */
static const OnigCodePoint CR_Katakana[] = {
4,
0x00a6, 0x00af,
0x00b1, 0x00dd,
0x8340, 0x837e,
0x8380, 0x8396,
}; /* CR_Katakana */
static int
init_property_list(void)
{
int r;
PROPERTY_LIST_ADD_PROP("Hiragana", CR_Hiragana);
PROPERTY_LIST_ADD_PROP("Katakana", CR_Katakana);
PropertyInited = 1;
end:
return r;
}
static int
property_name_to_ctype(OnigEncoding enc, UChar* p, UChar* end)
{
st_data_t ctype;
PROPERTY_LIST_INIT_CHECK;
if (onig_st_lookup_strend(PropertyNameTable, p, end, &ctype) == 0) {
return onigenc_minimum_property_name_to_ctype(enc, p, end);
}
return ctype;
}
static int
is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc)
{
if (ctype <= ONIGENC_MAX_STD_CTYPE) {
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else {
if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
return TRUE;
}
}
}
else {
PROPERTY_LIST_INIT_CHECK;
ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
if (ctype >= (unsigned int )PropertyListNum)
return ONIGERR_TYPE_BUG;
return onig_is_in_code_range((UChar* )PropertyList[ctype], code);
}
return FALSE;
}
static int
get_ctype_code_range(OnigCtype ctype, OnigCodePoint* sb_out,
const OnigCodePoint* ranges[], OnigEncoding enc ARG_UNUSED)
{
if (ctype <= ONIGENC_MAX_STD_CTYPE) {
return ONIG_NO_SUPPORT_CONFIG;
}
else {
*sb_out = 0x80;
PROPERTY_LIST_INIT_CHECK;
ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
if (ctype >= (OnigCtype )PropertyListNum)
return ONIGERR_TYPE_BUG;
*ranges = PropertyList[ctype];
return 0;
}
}
OnigEncodingDefine(shift_jis, Shift_JIS) = {
mbc_enc_len,
"Shift_JIS", /* name */
2, /* max byte length */
1, /* min byte length */
onigenc_is_mbc_newline_0x0a,
mbc_to_code,
code_to_mbclen,
code_to_mbc,
mbc_case_fold,
onigenc_ascii_apply_all_case_fold,
onigenc_ascii_get_case_fold_codes_by_str,
property_name_to_ctype,
is_code_ctype,
get_ctype_code_range,
left_adjust_char_head,
is_allowed_reverse_match,
0
};
/*
* Name: Shift_JIS
* MIBenum: 17
* Link: http://www.iana.org/assignments/character-sets
* Link: http://ja.wikipedia.org/wiki/Shift_JIS
*/
ENC_ALIAS("SJIS", "Shift_JIS")
/*
* Name: Windows-31J
* MIBenum: 2024
* Link: http://www.iana.org/assignments/character-sets
* Link: http://www.microsoft.com/globaldev/reference/dbcs/932.mspx
* Link: http://ja.wikipedia.org/wiki/Windows-31J
* Link: http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-932-2000.ucm
*/
ENC_REPLICATE("Windows-31J", "Shift_JIS")
ENC_ALIAS("CP932", "Windows-31J")
ENC_ALIAS("csWindows31J", "Windows-31J") /* IANA. IE6 don't accept Windows-31J but csWindows31J. */
/*
* Name: MacJapanese
* Link: http://unicode.org/Public/MAPPINGS/VENDORS/APPLE/JAPANESE.TXT
* Link: http://ja.wikipedia.org/wiki/MacJapanese
*/
ENC_REPLICATE("MacJapanese", "Shift_JIS")
ENC_ALIAS("MacJapan", "MacJapanese")
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