mozilla
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pjs
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pjs/intl/uconv/ucvja/nsJapaneseToUnicode.cpp

927 строки
30 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsJapaneseToUnicode.h"
#include "nsUCSupport.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "japanese.map"
#include "nsICharsetConverterManager.h"
#include "nsIServiceManager.h"
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
#define SJIS_INDEX mMapIndex[0]
#define JIS0208_INDEX mMapIndex[1]
#define JIS0212_INDEX gJIS0212Index
void nsJapaneseToUnicode::setMapMode()
{
nsresult res;
mMapIndex = gIndex;
nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (!prefBranch) return;
nsXPIDLCString prefMap;
res = prefBranch->GetCharPref("intl.jis0208.map", getter_Copies(prefMap));
if (!NS_SUCCEEDED(res)) return;
nsCaseInsensitiveCStringComparator comparator;
if ( prefMap.Equals(NS_LITERAL_CSTRING("cp932"), comparator) ) {
mMapIndex = gCP932Index;
} else if ( prefMap.Equals(NS_LITERAL_CSTRING("ibm943"), comparator) ) {
mMapIndex = gIBM943Index;
}
}
NS_IMETHODIMP nsShiftJISToUnicode::Convert(
const char * aSrc, PRInt32 * aSrcLen,
PRUnichar * aDest, PRInt32 * aDestLen)
{
static const PRUint8 sbIdx[256] =
{
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x00 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x08 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x10 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x18 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x20 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x28 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x30 */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x38 */
0, 1, 2, 3, 4, 5, 6, 7, /* 0x40 */
8, 9, 10, 11, 12, 13, 14, 15, /* 0x48 */
16, 17, 18, 19, 20, 21, 22, 23, /* 0x50 */
24, 25, 26, 27, 28, 29, 30, 31, /* 0x58 */
32, 33, 34, 35, 36, 37, 38, 39, /* 0x60 */
40, 41, 42, 43, 44, 45, 46, 47, /* 0x68 */
48, 49, 50, 51, 52, 53, 54, 55, /* 0x70 */
56, 57, 58, 59, 60, 61, 62, 0xFF, /* 0x78 */
63, 64, 65, 66, 67, 68, 69, 70, /* 0x80 */
71, 72, 73, 74, 75, 76, 77, 78, /* 0x88 */
79, 80, 81, 82, 83, 84, 85, 86, /* 0x90 */
87, 88, 89, 90, 91, 92, 93, 94, /* 0x98 */
95, 96, 97, 98, 99, 100, 101, 102, /* 0xa0 */
103, 104, 105, 106, 107, 108, 109, 110, /* 0xa8 */
111, 112, 113, 114, 115, 116, 117, 118, /* 0xb0 */
119, 120, 121, 122, 123, 124, 125, 126, /* 0xb8 */
127, 128, 129, 130, 131, 132, 133, 134, /* 0xc0 */
135, 136, 137, 138, 139, 140, 141, 142, /* 0xc8 */
143, 144, 145, 146, 147, 148, 149, 150, /* 0xd0 */
151, 152, 153, 154, 155, 156, 157, 158, /* 0xd8 */
159, 160, 161, 162, 163, 164, 165, 166, /* 0xe0 */
167, 168, 169, 170, 171, 172, 173, 174, /* 0xe8 */
175, 176, 177, 178, 179, 180, 181, 182, /* 0xf0 */
183, 184, 185, 186, 187, 0xFF, 0xFF, 0xFF, /* 0xf8 */
};
const unsigned char* srcEnd = (unsigned char*)aSrc + *aSrcLen;
const unsigned char* src =(unsigned char*) aSrc;
PRUnichar* destEnd = aDest + *aDestLen;
PRUnichar* dest = aDest;
while((src < srcEnd))
{
switch(mState)
{
case 0:
if(*src & 0x80)
{
mData = SJIS_INDEX[*src & 0x7F];
if(mData < 0xE000 )
{
mState = 1; // two bytes
} else {
if( mData > 0xFF00)
{
if(0xFFFD == mData) {
// IE-compatible handling of undefined codepoints:
// 0x80 --> U+0080
// 0xa0 --> U+F8F0
// 0xfd --> U+F8F1
// 0xfe --> U+F8F2
// 0xff --> U+F8F3
switch (*src) {
case 0x80:
*dest++ = (PRUnichar) *src;
break;
case 0xa0:
*dest++ = (PRUnichar) 0xf8f0;
break;
case 0xfd:
case 0xfe:
case 0xff:
*dest++ = (PRUnichar) 0xf8f1 +
(*src - (unsigned char)(0xfd));
break;
default:
*dest++ = 0x30FB;
}
if(dest >= destEnd)
goto error1;
} else {
*dest++ = mData; // JIS 0201
if(dest >= destEnd)
goto error1;
}
} else {
mState = 2; // EUDC
}
}
} else {
// ASCII
*dest++ = (PRUnichar) *src;
if(dest >= destEnd)
goto error1;
}
break;
case 1: // Index to table
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
*dest++ = 0x30FB;
} else {
PRUnichar ch = gJapaneseMap[mData+off];
if(ch == 0xfffd)
ch = 0x30fb;
*dest++ = ch;
}
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
case 2: // EUDC
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
*dest++ = 0x30fb;
} else {
*dest++ = mData + off;
}
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
}
src++;
}
*aDestLen = dest - aDest;
return NS_OK;
error1:
*aDestLen = dest-aDest;
src++;
if ((mState == 0) && (src == srcEnd)) {
return NS_OK;
}
*aSrcLen = src - (const unsigned char*)aSrc;
return NS_OK_UDEC_MOREOUTPUT;
}
NS_IMETHODIMP nsEUCJPToUnicodeV2::Convert(
const char * aSrc, PRInt32 * aSrcLen,
PRUnichar * aDest, PRInt32 * aDestLen)
{
static const PRUint8 sbIdx[256] =
{
/* 0x0X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x1X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x2X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x3X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x4X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x5X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x6X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x7X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x8X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x9X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xAX */
0xFF, 0, 1, 2, 3, 4, 5, 6,
7, 8 , 9, 10, 11, 12, 13, 14,
/* 0xBX */
15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, 26, 27, 28, 29, 30,
/* 0xCX */
31, 32, 33, 34, 35, 36, 37, 38,
39, 40, 41, 42, 43, 44, 45, 46,
/* 0xDX */
47, 48, 49, 50, 51, 52, 53, 54,
55, 56, 57, 58, 59, 60, 61, 62,
/* 0xEX */
63, 64, 65, 66, 67, 68, 69, 70,
71, 72, 73, 74, 75, 76, 77, 78,
/* 0xFX */
79, 80, 81, 82, 83, 84, 85, 86,
87, 88, 89, 90, 91, 92, 93, 0xFF,
};
const unsigned char* srcEnd = (unsigned char*)aSrc + *aSrcLen;
const unsigned char* src =(unsigned char*) aSrc;
PRUnichar* destEnd = aDest + *aDestLen;
PRUnichar* dest = aDest;
while((src < srcEnd))
{
switch(mState)
{
case 0:
if(*src & 0x80 && *src != (unsigned char)0xa0)
{
mData = JIS0208_INDEX[*src & 0x7F];
if(mData != 0xFFFD )
{
mState = 1; // two byte JIS0208
} else {
if( 0x8e == *src) {
// JIS 0201
mState = 2; // JIS0201
} else if(0x8f == *src) {
// JIS 0212
mState = 3; // JIS0212
} else {
// others
*dest++ = 0xFFFD;
if(dest >= destEnd)
goto error1;
}
}
} else {
// ASCII
*dest++ = (PRUnichar) *src;
if(dest >= destEnd)
goto error1;
}
break;
case 1: // Index to table
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
*dest++ = 0xFFFD;
// if the first byte is valid for EUC-JP but the second
// is not while being a valid US-ASCII(i.e. < 0xc0), save it
// instead of eating it up !
if ( ! (*src & 0xc0) )
*dest++ = (PRUnichar) *src;;
} else {
*dest++ = gJapaneseMap[mData+off];
}
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
case 2: // JIS 0201
{
if((0xA1 <= *src) && (*src <= 0xDF)) {
*dest++ = (0xFF61-0x00A1) + *src;
} else {
*dest++ = 0xFFFD;
// if 0x8e is not followed by a valid JIS X 0201 byte
// but by a valid US-ASCII, save it instead of eating it up.
if ( (PRUint8)*src < (PRUint8)0x7f )
*dest++ = (PRUnichar) *src;
}
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
case 3: // JIS 0212
{
if(*src & 0x80)
{
mData = JIS0212_INDEX[*src & 0x7F];
if(mData != 0xFFFD )
{
mState = 4;
} else {
mState = 5; // error
}
} else {
mState = 5; // error
}
}
break;
case 4:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
*dest++ = 0xFFFD;
} else {
*dest++ = gJapaneseMap[mData+off];
}
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
case 5: // two bytes undefined
{
*dest++ = 0xFFFD;
mState = 0;
if(dest >= destEnd)
goto error1;
}
break;
}
src++;
}
*aDestLen = dest - aDest;
return NS_OK;
error1:
*aDestLen = dest-aDest;
src++;
if ((mState == 0) && (src == srcEnd)) {
return NS_OK;
}
*aSrcLen = src - (const unsigned char*)aSrc;
return NS_OK_UDEC_MOREOUTPUT;
}
NS_IMETHODIMP nsISO2022JPToUnicodeV2::Convert(
const char * aSrc, PRInt32 * aSrcLen,
PRUnichar * aDest, PRInt32 * aDestLen)
{
static const PRUint16 fbIdx[128] =
{
/* 0x8X */
0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
/* 0x9X */
0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD, 0xFFFD,
/* 0xAX */
0xFFFD, 0, 94, 94* 2, 94* 3, 94* 4, 94* 5, 94* 6,
94* 7, 94* 8 , 94* 9, 94*10, 94*11, 94*12, 94*13, 94*14,
/* 0xBX */
94*15, 94*16, 94*17, 94*18, 94*19, 94*20, 94*21, 94*22,
94*23, 94*24, 94*25, 94*26, 94*27, 94*28, 94*29, 94*30,
/* 0xCX */
94*31, 94*32, 94*33, 94*34, 94*35, 94*36, 94*37, 94*38,
94*39, 94*40, 94*41, 94*42, 94*43, 94*44, 94*45, 94*46,
/* 0xDX */
94*47, 94*48, 94*49, 94*50, 94*51, 94*52, 94*53, 94*54,
94*55, 94*56, 94*57, 94*58, 94*59, 94*60, 94*61, 94*62,
/* 0xEX */
94*63, 94*64, 94*65, 94*66, 94*67, 94*68, 94*69, 94*70,
94*71, 94*72, 94*73, 94*74, 94*75, 94*76, 94*77, 94*78,
/* 0xFX */
94*79, 94*80, 94*81, 94*82, 94*83, 94*84, 94*85, 94*86,
94*87, 94*88, 94*89, 94*90, 94*91, 94*92, 94*93, 0xFFFD,
};
static const PRUint8 sbIdx[256] =
{
/* 0x0X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x1X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x2X */
0xFF, 0, 1, 2, 3, 4, 5, 6,
7, 8 , 9, 10, 11, 12, 13, 14,
/* 0x3X */
15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, 26, 27, 28, 29, 30,
/* 0x4X */
31, 32, 33, 34, 35, 36, 37, 38,
39, 40, 41, 42, 43, 44, 45, 46,
/* 0x5X */
47, 48, 49, 50, 51, 52, 53, 54,
55, 56, 57, 58, 59, 60, 61, 62,
/* 0x6X */
63, 64, 65, 66, 67, 68, 69, 70,
71, 72, 73, 74, 75, 76, 77, 78,
/* 0x7X */
79, 80, 81, 82, 83, 84, 85, 86,
87, 88, 89, 90, 91, 92, 93, 0xFF,
/* 0x8X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0x9X */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xAX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xBX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xCX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xDX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xEX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* 0xFX */
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
};
const unsigned char* srcEnd = (unsigned char*)aSrc + *aSrcLen;
const unsigned char* src =(unsigned char*) aSrc;
PRUnichar* destEnd = aDest + *aDestLen;
PRUnichar* dest = aDest;
while((src < srcEnd))
{
switch(mState)
{
case mState_ASCII:
if(0x1b == *src)
{
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
goto error2;
} else {
*dest++ = (PRUnichar) *src;
if(dest >= destEnd)
goto error1;
}
break;
case mState_ESC:
if( '(' == *src) {
mState = mState_ESC_28;
} else if ('$' == *src) {
mState = mState_ESC_24;
} else if ('.' == *src) { // for ISO-2022-JP-2
mState = mState_ESC_2e;
} else if ('N' == *src) { // for ISO-2022-JP-2
mState = mState_ESC_4e;
} else {
if((dest+2) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
mState = mLastLegalState;
}
break;
case mState_ESC_28: // ESC (
if( 'B' == *src) {
mState = mState_ASCII;
if (mRunLength == 0) {
goto error2;
}
mRunLength = 0;
} else if ('J' == *src) {
mState = mState_JISX0201_1976Roman;
mRunLength = 0;
} else if ('I' == *src) {
mState = mState_JISX0201_1976Kana;
mRunLength = 0;
} else {
if((dest+3) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
*dest++ = (PRUnichar) '(';
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
mState = mLastLegalState;
}
break;
case mState_ESC_24: // ESC $
if( '@' == *src) {
mState = mState_JISX0208_1978;
mRunLength = 0;
} else if ('A' == *src) {
mState = mState_GB2312_1980;
mRunLength = 0;
} else if ('B' == *src) {
mState = mState_JISX0208_1983;
mRunLength = 0;
} else if ('(' == *src) {
mState = mState_ESC_24_28;
} else {
if((dest+3) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
*dest++ = (PRUnichar) '$';
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
mState = mLastLegalState;
}
break;
case mState_ESC_24_28: // ESC $ (
if( 'C' == *src) {
mState = mState_KSC5601_1987;
mRunLength = 0;
} else if ('D' == *src) {
mState = mState_JISX0212_1990;
mRunLength = 0;
} else {
if((dest+4) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
*dest++ = (PRUnichar) '$';
*dest++ = (PRUnichar) '(';
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
mState = mLastLegalState;
}
break;
case mState_JISX0201_1976Roman:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
goto error2;
} else {
// XXX We need to decide how to handle \ and ~ here
// we may need a if statement here for '\' and '~'
// to map them to Yen and Overbar
*dest++ = (PRUnichar) *src;
++mRunLength;
if(dest >= destEnd)
goto error1;
}
break;
case mState_JISX0201_1976Kana:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else {
if((0x21 <= *src) && (*src <= 0x5F)) {
*dest++ = (0xFF61-0x0021) + *src;
++mRunLength;
} else {
goto error2;
}
if(dest >= destEnd)
goto error1;
}
break;
case mState_JISX0208_1978:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
mLastLegalState = mState;
mState = mState_ERROR;
} else {
mData = JIS0208_INDEX[*src & 0x7F];
if(0xFFFD == mData)
goto error2;
mState = mState_JISX0208_1978_2ndbyte;
}
break;
case mState_GB2312_1980:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
mLastLegalState = mState;
mState = mState_ERROR;
} else {
mData = fbIdx[*src & 0x7F];
if(0xFFFD == mData)
goto error2;
mState = mState_GB2312_1980_2ndbyte;
}
break;
case mState_JISX0208_1983:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
mLastLegalState = mState;
mState = mState_ERROR;
} else {
mData = JIS0208_INDEX[*src & 0x7F];
if(0xFFFD == mData)
goto error2;
mState = mState_JISX0208_1983_2ndbyte;
}
break;
case mState_KSC5601_1987:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
mLastLegalState = mState;
mState = mState_ERROR;
} else {
mData = fbIdx[*src & 0x7F];
if(0xFFFD == mData)
goto error2;
mState = mState_KSC5601_1987_2ndbyte;
}
break;
case mState_JISX0212_1990:
if(0x1b == *src) {
mLastLegalState = mState;
mState = mState_ESC;
} else if(*src & 0x80) {
mLastLegalState = mState;
mState = mState_ERROR;
} else {
mData = JIS0212_INDEX[*src & 0x7F];
if(0xFFFD == mData)
goto error2;
mState = mState_JISX0212_1990_2ndbyte;
}
break;
case mState_JISX0208_1978_2ndbyte:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
goto error2;
} else {
// XXX We need to map from JIS X 0208 1983 to 1987
// in the next line before pass to *dest++
*dest++ = gJapaneseMap[mData+off];
++mRunLength;
}
mState = mState_JISX0208_1978;
if(dest >= destEnd)
goto error1;
}
break;
case mState_GB2312_1980_2ndbyte:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
goto error2;
} else {
if (!mGB2312Decoder) {
// creating a delegate converter (GB2312)
nsresult rv;
nsCOMPtr<nsICharsetConverterManager> ccm =
do_GetService(kCharsetConverterManagerCID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = ccm->GetUnicodeDecoderRaw("GB2312", &mGB2312Decoder);
}
}
if (!mGB2312Decoder) {// failed creating a delegate converter
goto error2;
} else {
unsigned char gb[2];
PRUnichar uni;
PRInt32 gbLen = 2, uniLen = 1;
// ((mData/94)+0x21) is the original 1st byte.
// *src is the present 2nd byte.
// Put 2 bytes (one character) to gb[] with GB2312 encoding.
gb[0] = ((mData / 94) + 0x21) | 0x80;
gb[1] = *src | 0x80;
// Convert GB2312 to unicode.
mGB2312Decoder->Convert((const char *)gb, &gbLen,
&uni, &uniLen);
*dest++ = uni;
++mRunLength;
}
}
mState = mState_GB2312_1980;
if(dest >= destEnd)
goto error1;
}
break;
case mState_JISX0208_1983_2ndbyte:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
goto error2;
} else {
*dest++ = gJapaneseMap[mData+off];
++mRunLength;
}
mState = mState_JISX0208_1983;
if(dest >= destEnd)
goto error1;
}
break;
case mState_KSC5601_1987_2ndbyte:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
goto error2;
} else {
if (!mEUCKRDecoder) {
// creating a delegate converter (EUC-KR)
nsresult rv;
nsCOMPtr<nsICharsetConverterManager> ccm =
do_GetService(kCharsetConverterManagerCID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = ccm->GetUnicodeDecoderRaw("EUC-KR", &mEUCKRDecoder);
}
}
if (!mEUCKRDecoder) {// failed creating a delegate converter
goto error2;
} else {
unsigned char ksc[2];
PRUnichar uni;
PRInt32 kscLen = 2, uniLen = 1;
// ((mData/94)+0x21) is the original 1st byte.
// *src is the present 2nd byte.
// Put 2 bytes (one character) to ksc[] with EUC-KR encoding.
ksc[0] = ((mData / 94) + 0x21) | 0x80;
ksc[1] = *src | 0x80;
// Convert EUC-KR to unicode.
mEUCKRDecoder->Convert((const char *)ksc, &kscLen,
&uni, &uniLen);
*dest++ = uni;
++mRunLength;
}
}
mState = mState_KSC5601_1987;
if(dest >= destEnd)
goto error1;
}
break;
case mState_JISX0212_1990_2ndbyte:
{
PRUint8 off = sbIdx[*src];
if(0xFF == off) {
goto error2;
} else {
*dest++ = gJapaneseMap[mData+off];
++mRunLength;
}
mState = mState_JISX0212_1990;
if(dest >= destEnd)
goto error1;
}
break;
case mState_ESC_2e: // ESC .
// "ESC ." will designate 96 character set to G2.
mState = mLastLegalState;
if( 'A' == *src) {
G2charset = G2_ISO88591;
} else if ('F' == *src) {
G2charset = G2_ISO88597;
} else {
if((dest+3) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
*dest++ = (PRUnichar) '.';
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
}
break;
case mState_ESC_4e: // ESC N
// "ESC N" is the SS2 sequence, that invoke a G2 designated
// character set. Since SS2 is effective only for next one
// character, mState should be returned to the last status.
mState = mLastLegalState;
if((0x20 <= *src) && (*src <= 0x7F)) {
if (G2_ISO88591 == G2charset) {
*dest++ = *src | 0x80;
++mRunLength;
} else if (G2_ISO88597 == G2charset) {
if (!mISO88597Decoder) {
// creating a delegate converter (ISO-8859-7)
nsresult rv;
nsCOMPtr<nsICharsetConverterManager> ccm =
do_GetService(kCharsetConverterManagerCID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = ccm->GetUnicodeDecoderRaw("ISO-8859-7", &mISO88597Decoder);
}
}
if (!mISO88597Decoder) {// failed creating a delegate converter
goto error2;
} else {
// Put one character with ISO-8859-7 encoding.
unsigned char gr = *src | 0x80;
PRUnichar uni;
PRInt32 grLen = 1, uniLen = 1;
// Convert ISO-8859-7 to unicode.
mISO88597Decoder->Convert((const char *)&gr, &grLen,
&uni, &uniLen);
*dest++ = uni;
++mRunLength;
}
} else {// G2charset is G2_unknown (not designated yet)
goto error2;
}
if(dest >= destEnd)
goto error1;
} else {
if((dest+3) >= destEnd)
goto error1;
*dest++ = (PRUnichar) 0x1b;
*dest++ = (PRUnichar) 'N';
if(0x80 & *src)
goto error2;
*dest++ = (PRUnichar) *src;
}
break;
case mState_ERROR:
mState = mLastLegalState;
mRunLength = 0;
goto error2;
break;
} // switch
src++;
}
*aDestLen = dest - aDest;
return NS_OK;
error1:
*aDestLen = dest-aDest;
src++;
if ((mState == 0) && (src == srcEnd)) {
return NS_OK;
}
*aSrcLen = src - (const unsigned char*)aSrc;
return NS_OK_UDEC_MOREOUTPUT;
error2:
*aSrcLen = src - (const unsigned char*)aSrc;
*aDestLen = dest-aDest;
return NS_ERROR_UNEXPECTED;
}
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