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jconv.js
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jconv.js
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/*! ------------------------------------------------------
Jconv
Copyright (c) 2013-2014 narirou
MIT Licensed
------------------------------------------------------- */
( function() {
'use strict';
var unknown = '・'.charCodeAt( 0 );
var tables = {
'SJIS': require( './tables/SJIS' ),
'JIS': require( './tables/JIS' ),
'JISEXT': require( './tables/JISEXT' ),
'SJISInverted': require( './tables/SJISInverted' ),
'JISInverted': require( './tables/JISInverted' ),
'JISEXTInverted': require( './tables/JISEXTInverted' )
};
var encodings = {};
var jconv = module.exports = function( buf, from, to ) {
return jconv.convert( buf, from, to );
};
jconv.defineEncoding = function( obj ) {
var Encoding = function( obj ) {
this.name = obj.name;
this.convert = obj.convert;
};
encodings[ obj.name ] = new Encoding( obj );
};
jconv.convert = function( buf, from, to ) {
from = getName( from );
to = getName( to );
if( ! from || ! to ) {
throw new Error( 'Encoding not recognized.' );
}
buf = ensureBuffer( buf );
if( from === to ) {
return buf;
}
// Directly convert if possible.
var encoder = encodings[ from + 'to' + to ];
if( encoder ) {
return encoder.convert( buf );
}
var uniDecoder = encodings[ from + 'toUCS2' ],
uniEncoder = encodings[ 'UCS2to' + to ];
if( uniDecoder && uniEncoder ) {
return uniEncoder.convert( uniDecoder.convert( buf ) );
}
else {
throw new Error( 'Encoding not recognized.' );
}
};
jconv.decode = function( buf, from ) {
switch( from.toUpperCase() ) {
// Internal Encoding
case 'BINARY':
case 'BASE64':
case 'ASCII':
case 'HEX':
case 'UTF8':
case 'UTF-8':
case 'UNICODE':
case 'UCS2':
case 'UCS-2':
case 'UTF16LE':
case 'UTF-16LE':
return buf.toString( from );
default:
return jconv.convert( buf, from, 'UCS2' ).toString( 'UCS2' );
}
};
jconv.encode = function( str, to ) {
switch( to.toUpperCase() ) {
// Internal Encoding
case 'BASE64':
case 'ASCII':
case 'HEX':
case 'UTF8':
case 'UTF-8':
return new Buffer( str, to );
default:
return jconv.convert( str, 'UTF8', to );
}
};
jconv.encodingExists = function( encoding ) {
return getName( encoding ) ? true : false;
};
function getName( name ) {
switch( name.toUpperCase() ) {
case 'WINDOWS-31J':
case 'CP932':
case 'SJIS':
case 'SHIFTJIS':
case 'SHIFT_JIS':
return 'SJIS';
case 'EUCJP':
case 'EUC-JP':
return 'EUCJP';
case 'JIS':
case 'ISO2022JP':
case 'ISO-2022-JP':
case 'ISO-2022-JP-1':
return 'JIS';
case 'UTF8':
case 'UTF-8':
return 'UTF8';
case 'UNICODE':
case 'UCS2':
case 'UCS-2':
case 'UTF16LE':
case 'UTF-16LE':
return 'UCS2';
default:
return '';
}
}
function ensureBuffer( buf ) {
buf = buf || new Buffer( 0 );
return ( buf instanceof Buffer ) ? buf : new Buffer( buf.toString(), 'UTF8' );
}
// Unicode CharCode -> UTF8 Buffer
function setUtf8Buffer( unicode, utf8Buffer, offset ) {
if( unicode < 0x80 ) {
utf8Buffer[ offset++ ] = unicode;
}
else if( unicode < 0x800 ) {
utf8Buffer[ offset++ ] = 0xC0 | unicode >>> 6 ;
utf8Buffer[ offset++ ] = 0x80 | unicode & 0x3F;
}
else if( unicode < 0x10000 ) {
utf8Buffer[ offset++ ] = 0xE0 | unicode >>> 12 ;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 6 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode & 0x3F;
}
else if( unicode < 0x200000 ) {
utf8Buffer[ offset++ ] = 0xF0 | unicode >>> 18 ;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 12 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 6 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode & 0x3F;
}
else if( unicode < 0x4000000 ) {
utf8Buffer[ offset++ ] = 0xF8 | unicode >>> 24 ;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 18 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 12 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 6 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode & 0x3F;
}
else {
// ( >>>32 ) is not possible in ECMAScript. So use ( /0x40000000 ).
utf8Buffer[ offset++ ] = 0xFC | unicode / 0x40000000;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 24 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 18 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 12 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode >>> 6 & 0x3F;
utf8Buffer[ offset++ ] = 0x80 | unicode & 0x3F;
}
return offset;
}
function setUnicodeBuffer( unicode, unicodeBuffer, offset ) {
unicodeBuffer[ offset++ ] = unicode & 0xFF;
unicodeBuffer[ offset++ ] = unicode >> 8;
return offset;
}
// UCS2 = UTF16LE(no-BOM)
// UCS2 -> UTF8
jconv.defineEncoding({
name: 'UCS2toUTF8',
convert: function( buf ) {
var setUtf8Buf = setUtf8Buffer;
var len = buf.length,
utf8Buf = new Buffer( len * 3 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ],
buf2 = buf[ i++ ];
unicode = ( buf2 << 8 ) + buf1;
offset = setUtf8Buf( unicode, utf8Buf, offset );
}
return utf8Buf.slice( 0, offset );
}
});
// UCS2 -> SJIS
jconv.defineEncoding({
name: 'UCS2toSJIS',
convert: function( buf ) {
var tableSjisInv = tables[ 'SJISInverted' ],
unknownSjis = tableSjisInv[ unknown ];
var len = buf.length,
sjisBuf = new Buffer( len ),
offset = 0,
unicode;
for( var i = 0; i <len; ) {
var buf1 = buf[ i++ ],
buf2 = buf[ i++ ];
unicode = ( buf2 << 8 ) + buf1;
// ASCII
if( unicode < 0x80 ) {
sjisBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
sjisBuf[ offset++ ] = unicode - 0xFEC0;
}
// KANJI
else {
var code = tableSjisInv[ unicode ] || unknownSjis;
sjisBuf[ offset++ ] = code >> 8;
sjisBuf[ offset++ ] = code & 0xFF;
}
}
return sjisBuf.slice( 0, offset );
}
});
// UCS2 -> JIS
jconv.defineEncoding({
name: 'UCS2toJIS',
convert: function( buf ) {
var tableJisInv = tables[ 'JISInverted' ],
tableJisExtInv = tables[ 'JISEXTInverted' ],
unknownJis = tableJisInv[ unknown ];
var len = buf.length,
jisBuf = new Buffer( len * 3 + 4 ),
offset = 0,
unicode,
sequence = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ],
buf2 = buf[ i++ ];
unicode = ( buf2 << 8 ) + buf1;
// ASCII
if( unicode < 0x80 ) {
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
if( sequence !== 1 ) {
sequence = 1;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x49;
}
jisBuf[ offset++ ] = unicode - 0xFF40;
}
else {
var code = tableJisInv[ unicode ];
if( code ) {
// KANJI
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = code >> 8;
jisBuf[ offset++ ] = code & 0xFF;
}
else {
var ext = tableJisExtInv[ unicode ];
if( ext ) {
// EXTENSION
if( sequence !== 3 ) {
sequence = 3;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x44;
}
jisBuf[ offset++ ] = ext >> 8;
jisBuf[ offset++ ] = ext & 0xFF;
}
else {
// UNKNOWN
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = unknownJis >> 8;
jisBuf[ offset++ ] = unknownJis & 0xFF;
}
}
}
}
// Add ASCII ESC
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
return jisBuf.slice( 0, offset );
}
});
// UCS2 -> EUCJP
jconv.defineEncoding({
name: 'UCS2toEUCJP',
convert: function( buf ) {
var tableJisInv = tables[ 'JISInverted' ],
tableJisExtInv = tables[ 'JISEXTInverted' ],
unknownJis = tableJisInv[ unknown ];
var len = buf.length,
eucBuf = new Buffer( len * 2 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ],
buf2 = buf[ i++ ];
unicode = ( buf2 << 8 ) + buf1;
// ASCII
if( unicode < 0x80 ) {
eucBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
eucBuf[ offset++ ] = 0x8E;
eucBuf[ offset++ ] = unicode - 0xFFC0;
}
else {
// KANJI
var jis = tableJisInv[ unicode ];
if( jis ) {
eucBuf[ offset++ ] = ( jis >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( jis & 0xFF ) - 0x80;
}
else {
// EXTENSION
var ext = tableJisExtInv[ unicode ];
if( ext ) {
eucBuf[ offset++ ] = 0x8F;
eucBuf[ offset++ ] = ( ext >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( ext & 0xFF ) - 0x80;
}
// UNKNOWN
else {
eucBuf[ offset++ ] = ( unknownJis >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( unknownJis & 0xFF ) - 0x80;
}
}
}
}
return eucBuf.slice( 0, offset );
}
});
// UTF8 -> UCS2
jconv.defineEncoding({
name: 'UTF8toUCS2',
convert: function( buf ) {
var setUnicodeBuf = setUnicodeBuffer;
var len = buf.length,
unicodeBuf = new Buffer( len * 2 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
switch( buf1 >> 4 ) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
unicode = buf1;
break;
case 12: case 13:
unicode = (buf1 & 0x1F) << 6 | buf[ i++ ] & 0x3F;
break;
case 14:
unicode = (buf1 & 0x0F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
default:
unicode = (buf1 & 0x07) << 18 | (buf[ i++ ] & 0x3F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
}
offset = setUnicodeBuf( unicode, unicodeBuf, offset );
}
return unicodeBuf.slice( 0, offset );
}
});
// UTF8 -> SJIS
jconv.defineEncoding({
name: 'UTF8toSJIS',
convert: function( buf ) {
var tableSjisInv = tables[ 'SJISInverted' ],
unknownSjis = tableSjisInv[ unknown ];
var len = buf.length,
sjisBuf = new Buffer( len * 2 ),
offset = 0,
unicode;
for( var i = 0; i <len; ) {
var buf1 = buf[ i++ ];
switch( buf1 >> 4 ) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
unicode = buf1;
break;
case 12: case 13:
unicode = (buf1 & 0x1F) << 6 | buf[ i++ ] & 0x3F;
break;
case 14:
unicode = (buf1 & 0x0F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
default:
unicode = (buf1 & 0x07) << 18 | (buf[ i++ ] & 0x3F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
}
// ASCII
if( unicode < 0x80 ) {
sjisBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
sjisBuf[ offset++ ] = unicode - 0xFEC0;
}
// KANJI
else {
var code = tableSjisInv[ unicode ] || unknownSjis;
sjisBuf[ offset++ ] = code >> 8;
sjisBuf[ offset++ ] = code & 0xFF;
}
}
return sjisBuf.slice( 0, offset );
}
});
// UTF8 -> JIS
jconv.defineEncoding({
name: 'UTF8toJIS',
convert: function( buf ) {
var tableJisInv = tables[ 'JISInverted' ],
tableJisExtInv = tables[ 'JISEXTInverted' ],
unknownJis = tableJisInv[ unknown ];
var len = buf.length,
jisBuf = new Buffer( len * 3 + 4 ),
offset = 0,
unicode,
sequence = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
switch( buf1 >> 4 ) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
unicode = buf1;
break;
case 12: case 13:
unicode = (buf1 & 0x1F) << 6 | buf[ i++ ] & 0x3F;
break;
case 14:
unicode = (buf1 & 0x0F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
default:
unicode = (buf1 & 0x07) << 18 | (buf[ i++ ] & 0x3F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
}
// ASCII
if( unicode < 0x80 ) {
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
if( sequence !== 1 ) {
sequence = 1;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x49;
}
jisBuf[ offset++ ] = unicode - 0xFF40;
}
else {
var code = tableJisInv[ unicode ];
if( code ) {
// KANJI
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = code >> 8;
jisBuf[ offset++ ] = code & 0xFF;
}
else {
var ext = tableJisExtInv[ unicode ];
if( ext ) {
// EXTENSION
if( sequence !== 3 ) {
sequence = 3;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x44;
}
jisBuf[ offset++ ] = ext >> 8;
jisBuf[ offset++ ] = ext & 0xFF;
}
else {
// UNKNOWN
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = unknownJis >> 8;
jisBuf[ offset++ ] = unknownJis & 0xFF;
}
}
}
}
// Add ASCII ESC
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
return jisBuf.slice( 0, offset );
}
});
// UTF8 -> EUCJP
jconv.defineEncoding({
name: 'UTF8toEUCJP',
convert: function( buf ) {
var tableJisInv = tables[ 'JISInverted' ],
tableJisExtInv = tables[ 'JISEXTInverted' ],
unknownJis = tableJisInv[ unknown ];
var len = buf.length,
eucBuf = new Buffer( len * 2 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
switch( buf1 >> 4 ) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
unicode = buf1;
break;
case 12: case 13:
unicode = (buf1 & 0x1F) << 6 | buf[ i++ ] & 0x3F;
break;
case 14:
unicode = (buf1 & 0x0F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
default:
unicode = (buf1 & 0x07) << 18 | (buf[ i++ ] & 0x3F) << 12 | (buf[ i++ ] & 0x3F) << 6 | buf[ i++ ] & 0x3F;
break;
}
// ASCII
if( unicode < 0x80 ) {
eucBuf[ offset++ ] = unicode;
}
// HALFWIDTH_KATAKANA
else if( 0xFF61 <= unicode && unicode <= 0xFF9F ) {
eucBuf[ offset++ ] = 0x8E;
eucBuf[ offset++ ] = unicode - 0xFFC0;
}
else {
// KANJI
var jis = tableJisInv[ unicode ];
if( jis ) {
eucBuf[ offset++ ] = ( jis >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( jis & 0xFF ) - 0x80;
}
else {
// EXTENSION
var ext = tableJisExtInv[ unicode ];
if( ext ) {
eucBuf[ offset++ ] = 0x8F;
eucBuf[ offset++ ] = ( ext >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( ext & 0xFF ) - 0x80;
}
// UNKNOWN
else {
eucBuf[ offset++ ] = ( unknownJis >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( unknownJis & 0xFF ) - 0x80;
}
}
}
}
return eucBuf.slice( 0, offset );
}
});
// SJIS -> UCS2
jconv.defineEncoding({
name: 'SJIStoUCS2',
convert: function( buf ) {
var tableSjis = tables[ 'SJIS' ],
setUnicodeBuf = setUnicodeBuffer;
var len = buf.length,
unicodeBuf = new Buffer( len * 3 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ASCII
if( buf1 < 0x80 ) {
unicode = buf1;
}
// HALFWIDTH_KATAKANA
else if( 0xA0 <= buf1 && buf1 <= 0xDF ) {
unicode = buf1 + 0xFEC0;
}
// KANJI
else {
var code = ( buf1 << 8 ) + buf[ i++ ];
unicode = tableSjis[ code ] || unknown;
}
offset = setUnicodeBuf( unicode, unicodeBuf, offset );
}
return unicodeBuf.slice( 0, offset );
}
});
// SJIS -> UTF8
jconv.defineEncoding({
name: 'SJIStoUTF8',
convert: function( buf ) {
var tableSjis = tables[ 'SJIS' ],
setUtf8Buf = setUtf8Buffer;
var len = buf.length,
utf8Buf = new Buffer( len * 3 ),
offset = 0,
unicode;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ASCII
if( buf1 < 0x80 ) {
unicode = buf1;
}
// HALFWIDTH_KATAKANA
else if( 0xA0 <= buf1 && buf1 <= 0xDF ) {
unicode = buf1 + 0xFEC0;
}
// KANJI
else {
var code = ( buf1 << 8 ) + buf[ i++ ];
unicode = tableSjis[ code ] || unknown;
}
offset = setUtf8Buf( unicode, utf8Buf, offset );
}
return utf8Buf.slice( 0, offset );
}
});
// SJIS -> JIS
jconv.defineEncoding({
name: 'SJIStoJIS',
convert: function( buf ) {
var tableSjis = tables[ 'SJIS' ],
tableJisInv = tables[ 'JISInverted' ];
var len = buf.length,
jisBuf = new Buffer( len * 3 + 4 ),
offset = 0,
sequence = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ASCII
if( buf1 < 0x80 ) {
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
jisBuf[ offset++ ] = buf1;
}
// HALFWIDTH_KATAKANA
else if( 0xA1 <= buf1 && buf1 <= 0xDF ) {
if( sequence !== 1 ) {
sequence = 1;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x49;
}
jisBuf[ offset++ ] = buf1 - 0x80;
}
// KANJI
else if( buf1 <= 0xEE ) {
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
var buf2 = buf[ i++ ];
buf1 <<= 1;
if( buf2 < 0x9F ) {
if( buf1 < 0x13F ) {
buf1 -= 0xE1;
}
else {
buf1 -= 0x61;
}
if( buf2 > 0x7E ) {
buf2 -= 0x20;
}
else {
buf2 -= 0x1F;
}
}
else {
if( buf1 < 0x13F ) {
buf1 -= 0xE0;
}
else {
buf1 -= 0x60;
}
buf2 -= 0x7E;
}
jisBuf[ offset++ ] = buf1;
jisBuf[ offset++ ] = buf2;
}
// IBM EXTENSION -> the other
else if( buf1 >= 0xFA ) {
if( sequence !== 2 ) {
sequence = 2;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x24;
jisBuf[ offset++ ] = 0x42;
}
var sjis = ( buf1 << 8 ) + buf[ i++ ],
unicode = tableSjis[ sjis ] || unknown,
code = tableJisInv[ unicode ];
jisBuf[ offset++ ] = code >> 8;
jisBuf[ offset++ ] = code & 0xFF;
}
}
// Add ASCII ESC
if( sequence !== 0 ) {
sequence = 0;
jisBuf[ offset++ ] = 0x1B;
jisBuf[ offset++ ] = 0x28;
jisBuf[ offset++ ] = 0x42;
}
return jisBuf.slice( 0, offset );
}
});
// SJIS -> EUCJP
jconv.defineEncoding({
name: 'SJIStoEUCJP',
convert: function( buf ) {
var tableSjis = tables[ 'SJIS' ],
tableJisInv = tables[ 'JISInverted' ];
var len = buf.length,
eucBuf = new Buffer( len * 2 ),
offset = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ASCII
if( buf1 < 0x80 ) {
eucBuf[ offset++ ] = buf1;
}
// HALFWIDTH_KATAKANA
else if( 0xA1 <= buf1 && buf1 <= 0xDF ) {
eucBuf[ offset++ ] = 0x8E;
eucBuf[ offset++ ] = buf1;
}
// KANJI
else if( buf1 <= 0xEE ) {
var buf2 = buf[ i++ ];
buf1 <<= 1;
if( buf2 < 0x9F ) {
if( buf1 < 0x13F ) {
buf1 -= 0x61;
}
else {
buf1 -= 0xE1;
}
if( buf2 > 0x7E ) {
buf2 += 0x60;
}
else {
buf2 += 0x61;
}
}
else {
if( buf1 < 0x13F ) {
buf1 -= 0x60;
}
else {
buf1 -= 0xE0;
}
buf2 += 0x02;
}
eucBuf[ offset++ ] = buf1;
eucBuf[ offset++ ] = buf2;
}
// IBM EXTENSION -> the other
else if( buf1 >= 0xFA ) {
var sjis = ( buf1 << 8 ) + buf[ i++ ],
unicode = tableSjis[ sjis ] || unknown,
jis = tableJisInv[ unicode ];
eucBuf[ offset++ ] = ( jis >> 8 ) - 0x80;
eucBuf[ offset++ ] = ( jis & 0xFF ) - 0x80;
}
}
return eucBuf.slice( 0, offset );
}
});
// JIS -> UCS2
jconv.defineEncoding({
name: 'JIStoUCS2',
convert: function( buf ) {
var tableJis = tables[ 'JIS' ],
tableJisExt = tables[ 'JISEXT' ],
setUnicodeBuf = setUnicodeBuffer;
var len = buf.length,
unicodeBuf = new Buffer( len * 2 ),
offset = 0,
unicode,
sequence = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ESC Sequence
if( buf1 === 0x1b ) {
var buf2 = buf[ i++ ],
buf3 = buf[ i++ ];
switch( buf2 ) {
case 0x28:
if( buf3 === 0x42 || buf === 0xA1 ) {
sequence = 0;
}
else if( buf3 === 0x49 ) {
sequence = 1;
}
break;
case 0x26:
sequence = 2;
i += 3;
break;
case 0x24:
if( buf3 === 0x40 || buf3 === 0x42 ) {
sequence = 2;
}
else if( buf3 === 0x28 ) {
sequence = 3;
i++;
}
break;
}
continue;
}
switch( sequence ) {
// ASCII
case 0:
unicode = buf1;
break;
// HALFWIDTH_KATAKANA
case 1:
unicode = buf1 + 0xFF40;
break;
// KANJI
case 2:
var code = ( buf1 << 8 ) + buf[ i++ ];
unicode = tableJis[ code ] || unknown;
break;
// EXTENSION
case 3:
var code = ( buf1 << 8 ) + buf[ i++ ];
unicode = tableJisExt[ code ] || unknown;
break;
}
offset = setUnicodeBuf( unicode, unicodeBuf, offset );
}
return unicodeBuf.slice( 0, offset );
}
});
// JIS -> UTF8
jconv.defineEncoding({
name: 'JIStoUTF8',
convert: function( buf ) {
var tableJis = tables[ 'JIS' ],
tableJisExt = tables[ 'JISEXT' ],
setUtf8Buf = setUtf8Buffer;
var len = buf.length,
utf8Buf = new Buffer( len * 2 ),
offset = 0,
unicode,
sequence = 0;
for( var i = 0; i < len; ) {
var buf1 = buf[ i++ ];
// ESC Sequence
if( buf1 === 0x1b ) {
var buf2 = buf[ i++ ],
buf3 = buf[ i++ ];
switch( buf2 ) {
case 0x28:
if( buf3 === 0x42 || buf === 0xA1 ) {
sequence = 0;
}
else if( buf3 === 0x49 ) {
sequence = 1;
}