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Merge pull request #27 from runk/typescript 

BREAKING CHANGE: Repo overhaul

- Deprecation of callbacks in favour of promises
- Deprecation of `detectAll`, `detectFileAll` and `detectFileAllSync` - use `analyse` fn instead.
- Typescript typings now included as part of distribution
- Modules support
- Travis CI org => com migration
- Lazy loading of `fs` module to enable usage in browser
This commit is contained in:
Dmitry Shirokov 2020-03-31 20:58:29 +11:00
parent c06f4dce7e 64f6ad28a3
commit a6fca620c8
75 changed files with 12347 additions and 3467 deletions
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3
.gitignore vendored
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@ -1,3 +1,6 @@
testing.js testing.js
.DS_Store .DS_Store
node_modules node_modules
coverage
npm-debug.log
lib

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.prettierrc.json Normal file
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{
"singleQuote": true
}

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LICENSE
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Copyright (C) 2019 Dmitry Shirokov Copyright (C) 2020 Dmitry Shirokov
Permission is hereby granted, free of charge, to any person obtaining a copy Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal of this software and associated documentation files (the "Software"), to deal

96
README.md
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# chardet [![Build Status](https://travis-ci.org/runk/node-chardet.png)](https://travis-ci.org/runk/node-chardet)
chardet [![Build Status](https://travis-ci.org/runk/node-chardet.png)](https://travis-ci.org/runk/node-chardet)
=====
Chardet is a character detection module for NodeJS written in pure Javascript. Chardet is a character detection module for NodeJS written in pure Javascript.
Module is based on ICU project http://site.icu-project.org/, which uses character Module is based on ICU project http://site.icu-project.org/, which uses character
@ -15,27 +13,31 @@ npm i chardet
## Usage ## Usage
To return the encoding with the highest confidence: To return the encoding with the highest confidence:
```javascript ```javascript
var chardet = require('chardet'); const chardet = require('chardet');
chardet.detect(Buffer.from('hello there!')); chardet.detect(Buffer.from('hello there!'));
// or // or
chardet.detectFile('/path/to/file', function(err, encoding) {}); chardet.detectFile('/path/to/file').then(encoding => console.log(encoding));
// or // or
chardet.detectFileSync('/path/to/file'); chardet.detectFileSync('/path/to/file');
``` ```
To return the full list of possible encodings use `analyse` method.
To return the full list of possible encodings:
```javascript ```javascript
var chardet = require('chardet'); const chardet = require('chardet');
chardet.detectAll(Buffer.from('hello there!')); chardet.analyse(Buffer.from('hello there!'));
// or ```
chardet.detectFileAll('/path/to/file', function(err, encoding) {});
// or
chardet.detectFileAllSync('/path/to/file');
//Returned value is an array of objects sorted by confidence value in decending order Returned value is an array of objects sorted by confidence value in decending order
//e.g. [{ confidence: 90, name: 'UTF-8'}, {confidence: 20, name: 'windows-1252', lang: 'fr'}]
```javascript
[
{ confidence: 90, name: 'UTF-8' },
{ confidence: 20, name: 'windows-1252', lang: 'fr' }
];
``` ```
## Working with large data sets ## Working with large data sets
@ -44,38 +46,44 @@ Sometimes, when data set is huge and you want to optimize performace (in tradeof
you can sample only first N bytes of the buffer: you can sample only first N bytes of the buffer:
```javascript ```javascript
chardet.detectFile('/path/to/file', { sampleSize: 32 }, function(err, encoding) {}); chardet
.detectFile('/path/to/file', { sampleSize: 32 })
.then(encoding => console.log(encoding));
``` ```
## Supported Encodings: ## Supported Encodings:
* UTF-8 - UTF-8
* UTF-16 LE - UTF-16 LE
* UTF-16 BE - UTF-16 BE
* UTF-32 LE - UTF-32 LE
* UTF-32 BE - UTF-32 BE
* ISO-2022-JP - ISO-2022-JP
* ISO-2022-KR - ISO-2022-KR
* ISO-2022-CN - ISO-2022-CN
* Shift-JIS - Shift-JIS
* Big5 - Big5
* EUC-JP - EUC-JP
* EUC-KR - EUC-KR
* GB18030 - GB18030
* ISO-8859-1 - ISO-8859-1
* ISO-8859-2 - ISO-8859-2
* ISO-8859-5 - ISO-8859-5
* ISO-8859-6 - ISO-8859-6
* ISO-8859-7 - ISO-8859-7
* ISO-8859-8 - ISO-8859-8
* ISO-8859-9 - ISO-8859-9
* windows-1250 - windows-1250
* windows-1251 - windows-1251
* windows-1252 - windows-1252
* windows-1253 - windows-1253
* windows-1254 - windows-1254
* windows-1255 - windows-1255
* windows-1256 - windows-1256
* KOI8-R - KOI8-R
Currently only these encodings are supported, more will be added soon. Currently only these encodings are supported.
## Typescript?
Yes. Type definitions are included.

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encoding/iso2022.js
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var util = require('util'),
Match = require ('../match');
/**
* This is a superclass for the individual detectors for
* each of the detectable members of the ISO 2022 family
* of encodings.
*/
function ISO_2022() {}
ISO_2022.prototype.match = function(det) {
/**
* Matching function shared among the 2022 detectors JP, CN and KR
* Counts up the number of legal an unrecognized escape sequences in
* the sample of text, and computes a score based on the total number &
* the proportion that fit the encoding.
*
*
* @param text the byte buffer containing text to analyse
* @param textLen the size of the text in the byte.
* @param escapeSequences the byte escape sequences to test for.
* @return match quality, in the range of 0-100.
*/
var i, j;
var escN;
var hits = 0;
var misses = 0;
var shifts = 0;
var quality;
// TODO: refactor me
var text = det.fInputBytes;
var textLen = det.fInputLen;
scanInput:
for (i = 0; i < textLen; i++) {
if (text[i] == 0x1b) {
checkEscapes:
for (escN = 0; escN < this.escapeSequences.length; escN++) {
var seq = this.escapeSequences[escN];
if ((textLen - i) < seq.length)
continue checkEscapes;
for (j = 1; j < seq.length; j++)
if (seq[j] != text[i + j])
continue checkEscapes;
hits++;
i += seq.length - 1;
continue scanInput;
}
misses++;
}
// Shift in/out
if (text[i] == 0x0e || text[i] == 0x0f)
shifts++;
}
if (hits == 0)
return null;
//
// Initial quality is based on relative proportion of recongized vs.
// unrecognized escape sequences.
// All good: quality = 100;
// half or less good: quality = 0;
// linear inbetween.
quality = (100 * hits - 100 * misses) / (hits + misses);
// Back off quality if there were too few escape sequences seen.
// Include shifts in this computation, so that KR does not get penalized
// for having only a single Escape sequence, but many shifts.
if (hits + shifts < 5)
quality -= (5 - (hits + shifts)) * 10;
return quality <= 0 ? null : new Match(det, this, quality);
};
module.exports.ISO_2022_JP = function() {
this.name = function() {
return 'ISO-2022-JP';
};
this.escapeSequences = [
[ 0x1b, 0x24, 0x28, 0x43 ], // KS X 1001:1992
[ 0x1b, 0x24, 0x28, 0x44 ], // JIS X 212-1990
[ 0x1b, 0x24, 0x40 ], // JIS C 6226-1978
[ 0x1b, 0x24, 0x41 ], // GB 2312-80
[ 0x1b, 0x24, 0x42 ], // JIS X 208-1983
[ 0x1b, 0x26, 0x40 ], // JIS X 208 1990, 1997
[ 0x1b, 0x28, 0x42 ], // ASCII
[ 0x1b, 0x28, 0x48 ], // JIS-Roman
[ 0x1b, 0x28, 0x49 ], // Half-width katakana
[ 0x1b, 0x28, 0x4a ], // JIS-Roman
[ 0x1b, 0x2e, 0x41 ], // ISO 8859-1
[ 0x1b, 0x2e, 0x46 ] // ISO 8859-7
];
};
util.inherits(module.exports.ISO_2022_JP, ISO_2022);
module.exports.ISO_2022_KR = function() {
this.name = function() {
return 'ISO-2022-KR';
};
this.escapeSequences = [
[ 0x1b, 0x24, 0x29, 0x43 ]
];
};
util.inherits(module.exports.ISO_2022_KR, ISO_2022);
module.exports.ISO_2022_CN = function() {
this.name = function() {
return 'ISO-2022-CN';
};
this.escapeSequences = [
[ 0x1b, 0x24, 0x29, 0x41 ], // GB 2312-80
[ 0x1b, 0x24, 0x29, 0x47 ], // CNS 11643-1992 Plane 1
[ 0x1b, 0x24, 0x2A, 0x48 ], // CNS 11643-1992 Plane 2
[ 0x1b, 0x24, 0x29, 0x45 ], // ISO-IR-165
[ 0x1b, 0x24, 0x2B, 0x49 ], // CNS 11643-1992 Plane 3
[ 0x1b, 0x24, 0x2B, 0x4A ], // CNS 11643-1992 Plane 4
[ 0x1b, 0x24, 0x2B, 0x4B ], // CNS 11643-1992 Plane 5
[ 0x1b, 0x24, 0x2B, 0x4C ], // CNS 11643-1992 Plane 6
[ 0x1b, 0x24, 0x2B, 0x4D ], // CNS 11643-1992 Plane 7
[ 0x1b, 0x4e ], // SS2
[ 0x1b, 0x4f ] // SS3
];
};
util.inherits(module.exports.ISO_2022_CN, ISO_2022);

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encoding/mbcs.js
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var util = require('util'),
Match = require ('../match');
/**
* Binary search implementation (recursive)
*/
function binarySearch(arr, searchValue) {
function find(arr, searchValue, left, right) {
if (right < left)
return -1;
/*
int mid = mid = (left + right) / 2;
There is a bug in the above line;
Joshua Bloch suggests the following replacement:
*/
var mid = Math.floor((left + right) >>> 1);
if (searchValue > arr[mid])
return find(arr, searchValue, mid + 1, right);
if (searchValue < arr[mid])
return find(arr, searchValue, left, mid - 1);
return mid;
};
return find(arr, searchValue, 0, arr.length - 1);
};
// 'Character' iterated character class.
// Recognizers for specific mbcs encodings make their 'characters' available
// by providing a nextChar() function that fills in an instance of iteratedChar
// with the next char from the input.
// The returned characters are not converted to Unicode, but remain as the raw
// bytes (concatenated into an int) from the codepage data.
//
// For Asian charsets, use the raw input rather than the input that has been
// stripped of markup. Detection only considers multi-byte chars, effectively
// stripping markup anyway, and double byte chars do occur in markup too.
//
function IteratedChar() {
this.charValue = 0; // 1-4 bytes from the raw input data
this.index = 0;
this.nextIndex = 0;
this.error = false;
this.done = false;
this.reset = function() {
this.charValue = 0;
this.index = -1;
this.nextIndex = 0;
this.error = false;
this.done = false;
};
this.nextByte = function(det) {
if (this.nextIndex >= det.fRawLength) {
this.done = true;
return -1;
}
var byteValue = det.fRawInput[this.nextIndex++] & 0x00ff;
return byteValue;
};
};
/**
* Asian double or multi-byte - charsets.
* Match is determined mostly by the input data adhering to the
* encoding scheme for the charset, and, optionally,
* frequency-of-occurence of characters.
*/
function mbcs() {};
/**
* Test the match of this charset with the input text data
* which is obtained via the CharsetDetector object.
*
* @param det The CharsetDetector, which contains the input text
* to be checked for being in this charset.
* @return Two values packed into one int (Damn java, anyhow)
* bits 0-7: the match confidence, ranging from 0-100
* bits 8-15: The match reason, an enum-like value.
*/
mbcs.prototype.match = function(det) {
var singleByteCharCount = 0, //TODO Do we really need this?
doubleByteCharCount = 0,
commonCharCount = 0,
badCharCount = 0,
totalCharCount = 0,
confidence = 0;
var iter = new IteratedChar();
detectBlock: {
for (iter.reset(); this.nextChar(iter, det);) {
totalCharCount++;
if (iter.error) {
badCharCount++;
} else {
var cv = iter.charValue & 0xFFFFFFFF;
if (cv <= 0xff) {
singleByteCharCount++;
} else {
doubleByteCharCount++;
if (this.commonChars != null) {
// NOTE: This assumes that there are no 4-byte common chars.
if (binarySearch(this.commonChars, cv) >= 0) {
commonCharCount++;
}
}
}
}
if (badCharCount >= 2 && badCharCount * 5 >= doubleByteCharCount) {
// console.log('its here!')
// Bail out early if the byte data is not matching the encoding scheme.
break detectBlock;
}
}
if (doubleByteCharCount <= 10 && badCharCount== 0) {
// Not many multi-byte chars.
if (doubleByteCharCount == 0 && totalCharCount < 10) {
// There weren't any multibyte sequences, and there was a low density of non-ASCII single bytes.
// We don't have enough data to have any confidence.
// Statistical analysis of single byte non-ASCII charcters would probably help here.
confidence = 0;
}
else {
// ASCII or ISO file? It's probably not our encoding,
// but is not incompatible with our encoding, so don't give it a zero.
confidence = 10;
}
break detectBlock;
}
//
// No match if there are too many characters that don't fit the encoding scheme.
// (should we have zero tolerance for these?)
//
if (doubleByteCharCount < 20 * badCharCount) {
confidence = 0;
break detectBlock;
}
if (this.commonChars == null) {
// We have no statistics on frequently occuring characters.
// Assess confidence purely on having a reasonable number of
// multi-byte characters (the more the better
confidence = 30 + doubleByteCharCount - 20 * badCharCount;
if (confidence > 100) {
confidence = 100;
}
} else {
//
// Frequency of occurence statistics exist.
//
var maxVal = Math.log(parseFloat(doubleByteCharCount) / 4);
var scaleFactor = 90.0 / maxVal;
confidence = Math.floor(Math.log(commonCharCount + 1) * scaleFactor + 10);
confidence = Math.min(confidence, 100);
}
} // end of detectBlock:
return confidence == 0 ? null : new Match(det, this, confidence);
};
/**
* Get the next character (however many bytes it is) from the input data
* Subclasses for specific charset encodings must implement this function
* to get characters according to the rules of their encoding scheme.
*
* This function is not a method of class iteratedChar only because
* that would require a lot of extra derived classes, which is awkward.
* @param it The iteratedChar 'struct' into which the returned char is placed.
* @param det The charset detector, which is needed to get at the input byte data
* being iterated over.
* @return True if a character was returned, false at end of input.
*/
mbcs.prototype.nextChar = function(iter, det) {};
/**
* Shift-JIS charset recognizer.
*/
module.exports.sjis = function() {
this.name = function() {
return 'Shift-JIS';
};
this.language = function() {
return 'ja';
};
// TODO: This set of data comes from the character frequency-
// of-occurence analysis tool. The data needs to be moved
// into a resource and loaded from there.
this.commonChars = [
0x8140, 0x8141, 0x8142, 0x8145, 0x815b, 0x8169, 0x816a, 0x8175, 0x8176, 0x82a0,
0x82a2, 0x82a4, 0x82a9, 0x82aa, 0x82ab, 0x82ad, 0x82af, 0x82b1, 0x82b3, 0x82b5,
0x82b7, 0x82bd, 0x82be, 0x82c1, 0x82c4, 0x82c5, 0x82c6, 0x82c8, 0x82c9, 0x82cc,
0x82cd, 0x82dc, 0x82e0, 0x82e7, 0x82e8, 0x82e9, 0x82ea, 0x82f0, 0x82f1, 0x8341,
0x8343, 0x834e, 0x834f, 0x8358, 0x835e, 0x8362, 0x8367, 0x8375, 0x8376, 0x8389,
0x838a, 0x838b, 0x838d, 0x8393, 0x8e96, 0x93fa, 0x95aa
];
this.nextChar = function(iter, det) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte;
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0)
return false;
if (firstByte <= 0x7f || (firstByte > 0xa0 && firstByte <= 0xdf))
return true;
var secondByte = iter.nextByte(det);
if (secondByte < 0)
return false;
iter.charValue = (firstByte << 8) | secondByte;
if (! ((secondByte >= 0x40 && secondByte <= 0x7f) || (secondByte >= 0x80 && secondByte <= 0xff))) {
// Illegal second byte value.
iter.error = true;
}
return true;
};
};
util.inherits(module.exports.sjis, mbcs);
/**
* Big5 charset recognizer.
*/
module.exports.big5 = function() {
this.name = function() {
return 'Big5';
};
this.language = function() {
return 'zh';
};
// TODO: This set of data comes from the character frequency-
// of-occurence analysis tool. The data needs to be moved
// into a resource and loaded from there.
this.commonChars = [
0xa140, 0xa141, 0xa142, 0xa143, 0xa147, 0xa149, 0xa175, 0xa176, 0xa440, 0xa446,
0xa447, 0xa448, 0xa451, 0xa454, 0xa457, 0xa464, 0xa46a, 0xa46c, 0xa477, 0xa4a3,
0xa4a4, 0xa4a7, 0xa4c1, 0xa4ce, 0xa4d1, 0xa4df, 0xa4e8, 0xa4fd, 0xa540, 0xa548,
0xa558, 0xa569, 0xa5cd, 0xa5e7, 0xa657, 0xa661, 0xa662, 0xa668, 0xa670, 0xa6a8,
0xa6b3, 0xa6b9, 0xa6d3, 0xa6db, 0xa6e6, 0xa6f2, 0xa740, 0xa751, 0xa759, 0xa7da,
0xa8a3, 0xa8a5, 0xa8ad, 0xa8d1, 0xa8d3, 0xa8e4, 0xa8fc, 0xa9c0, 0xa9d2, 0xa9f3,
0xaa6b, 0xaaba, 0xaabe, 0xaacc, 0xaafc, 0xac47, 0xac4f, 0xacb0, 0xacd2, 0xad59,
0xaec9, 0xafe0, 0xb0ea, 0xb16f, 0xb2b3, 0xb2c4, 0xb36f, 0xb44c, 0xb44e, 0xb54c,
0xb5a5, 0xb5bd, 0xb5d0, 0xb5d8, 0xb671, 0xb7ed, 0xb867, 0xb944, 0xbad8, 0xbb44,
0xbba1, 0xbdd1, 0xc2c4, 0xc3b9, 0xc440, 0xc45f
];
this.nextChar = function(iter, det) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0)
return false;
// single byte character.
if (firstByte <= 0x7f || firstByte == 0xff)
return true;
var secondByte = iter.nextByte(det);
if (secondByte < 0)
return false;
iter.charValue = (iter.charValue << 8) | secondByte;
if (secondByte < 0x40 || secondByte == 0x7f || secondByte == 0xff)
iter.error = true;
return true;
};
};
util.inherits(module.exports.big5, mbcs);
/**
* EUC charset recognizers. One abstract class that provides the common function
* for getting the next character according to the EUC encoding scheme,
* and nested derived classes for EUC_KR, EUC_JP, EUC_CN.
*
* Get the next character value for EUC based encodings.
* Character 'value' is simply the raw bytes that make up the character
* packed into an int.
*/
function eucNextChar(iter, det) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = 0;
var secondByte = 0;
var thirdByte = 0;
//int fourthByte = 0;
buildChar: {
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0) {
// Ran off the end of the input data
iter.done = true;
break buildChar;
}
if (firstByte <= 0x8d) {
// single byte char
break buildChar;
}
secondByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | secondByte;
if (firstByte >= 0xA1 && firstByte <= 0xfe) {
// Two byte Char
if (secondByte < 0xa1) {
iter.error = true;
}
break buildChar;
}
if (firstByte == 0x8e) {
// Code Set 2.
// In EUC-JP, total char size is 2 bytes, only one byte of actual char value.
// In EUC-TW, total char size is 4 bytes, three bytes contribute to char value.
// We don't know which we've got.
// Treat it like EUC-JP. If the data really was EUC-TW, the following two
// bytes will look like a well formed 2 byte char.
if (secondByte < 0xa1) {
iter.error = true;
}
break buildChar;
}
if (firstByte == 0x8f) {
// Code set 3.
// Three byte total char size, two bytes of actual char value.
thirdByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | thirdByte;
if (thirdByte < 0xa1) {
iter.error = true;
}
}
}
return iter.done == false;
};
/**
* The charset recognize for EUC-JP. A singleton instance of this class
* is created and kept by the public CharsetDetector class
*/
module.exports.euc_jp = function() {
this.name = function() {
return 'EUC-JP';
};
this.language = function() {
return 'ja';
};
// TODO: This set of data comes from the character frequency-
// of-occurence analysis tool. The data needs to be moved
// into a resource and loaded from there.
this.commonChars = [
0xa1a1, 0xa1a2, 0xa1a3, 0xa1a6, 0xa1bc, 0xa1ca, 0xa1cb, 0xa1d6, 0xa1d7, 0xa4a2,
0xa4a4, 0xa4a6, 0xa4a8, 0xa4aa, 0xa4ab, 0xa4ac, 0xa4ad, 0xa4af, 0xa4b1, 0xa4b3,
0xa4b5, 0xa4b7, 0xa4b9, 0xa4bb, 0xa4bd, 0xa4bf, 0xa4c0, 0xa4c1, 0xa4c3, 0xa4c4,
0xa4c6, 0xa4c7, 0xa4c8, 0xa4c9, 0xa4ca, 0xa4cb, 0xa4ce, 0xa4cf, 0xa4d0, 0xa4de,
0xa4df, 0xa4e1, 0xa4e2, 0xa4e4, 0xa4e8, 0xa4e9, 0xa4ea, 0xa4eb, 0xa4ec, 0xa4ef,
0xa4f2, 0xa4f3, 0xa5a2, 0xa5a3, 0xa5a4, 0xa5a6, 0xa5a7, 0xa5aa, 0xa5ad, 0xa5af,
0xa5b0, 0xa5b3, 0xa5b5, 0xa5b7, 0xa5b8, 0xa5b9, 0xa5bf, 0xa5c3, 0xa5c6, 0xa5c7,
0xa5c8, 0xa5c9, 0xa5cb, 0xa5d0, 0xa5d5, 0xa5d6, 0xa5d7, 0xa5de, 0xa5e0, 0xa5e1,
0xa5e5, 0xa5e9, 0xa5ea, 0xa5eb, 0xa5ec, 0xa5ed, 0xa5f3, 0xb8a9, 0xb9d4, 0xbaee,
0xbbc8, 0xbef0, 0xbfb7, 0xc4ea, 0xc6fc, 0xc7bd, 0xcab8, 0xcaf3, 0xcbdc, 0xcdd1
];
this.nextChar = eucNextChar;
};
util.inherits(module.exports.euc_jp, mbcs);
/**
* The charset recognize for EUC-KR. A singleton instance of this class
* is created and kept by the public CharsetDetector class
*/
module.exports.euc_kr = function() {
this.name = function() {
return 'EUC-KR';
};
this.language = function() {
return 'ko';
};
// TODO: This set of data comes from the character frequency-
// of-occurence analysis tool. The data needs to be moved
// into a resource and loaded from there.
this.commonChars = [
0xb0a1, 0xb0b3, 0xb0c5, 0xb0cd, 0xb0d4, 0xb0e6, 0xb0ed, 0xb0f8, 0xb0fa, 0xb0fc,
0xb1b8, 0xb1b9, 0xb1c7, 0xb1d7, 0xb1e2, 0xb3aa, 0xb3bb, 0xb4c2, 0xb4cf, 0xb4d9,
0xb4eb, 0xb5a5, 0xb5b5, 0xb5bf, 0xb5c7, 0xb5e9, 0xb6f3, 0xb7af, 0xb7c2, 0xb7ce,
0xb8a6, 0xb8ae, 0xb8b6, 0xb8b8, 0xb8bb, 0xb8e9, 0xb9ab, 0xb9ae, 0xb9cc, 0xb9ce,
0xb9fd, 0xbab8, 0xbace, 0xbad0, 0xbaf1, 0xbbe7, 0xbbf3, 0xbbfd, 0xbcad, 0xbcba,
0xbcd2, 0xbcf6, 0xbdba, 0xbdc0, 0xbdc3, 0xbdc5, 0xbec6, 0xbec8, 0xbedf, 0xbeee,
0xbef8, 0xbefa, 0xbfa1, 0xbfa9, 0xbfc0, 0xbfe4, 0xbfeb, 0xbfec, 0xbff8, 0xc0a7,
0xc0af, 0xc0b8, 0xc0ba, 0xc0bb, 0xc0bd, 0xc0c7, 0xc0cc, 0xc0ce, 0xc0cf, 0xc0d6,
0xc0da, 0xc0e5, 0xc0fb, 0xc0fc, 0xc1a4, 0xc1a6, 0xc1b6, 0xc1d6, 0xc1df, 0xc1f6,
0xc1f8, 0xc4a1, 0xc5cd, 0xc6ae, 0xc7cf, 0xc7d1, 0xc7d2, 0xc7d8, 0xc7e5, 0xc8ad
];
this.nextChar = eucNextChar;
};
util.inherits(module.exports.euc_kr, mbcs);
/**
* GB-18030 recognizer. Uses simplified Chinese statistics.
*/
module.exports.gb_18030 = function() {
this.name = function() {
return 'GB18030';
};
this.language = function() {
return 'zh';
};
/*
* Get the next character value for EUC based encodings.
* Character 'value' is simply the raw bytes that make up the character
* packed into an int.
*/
this.nextChar = function(iter, det) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = 0;
var secondByte = 0;
var thirdByte = 0;
var fourthByte = 0;
buildChar: {
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0) {
// Ran off the end of the input data
iter.done = true;
break buildChar;
}
if (firstByte <= 0x80) {
// single byte char
break buildChar;
}
secondByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | secondByte;
if (firstByte >= 0x81 && firstByte <= 0xFE) {
// Two byte Char
if ((secondByte >= 0x40 && secondByte <= 0x7E) || (secondByte >=80 && secondByte <= 0xFE)) {
break buildChar;
}
// Four byte char
if (secondByte >= 0x30 && secondByte <= 0x39) {
thirdByte = iter.nextByte(det);
if (thirdByte >= 0x81 && thirdByte <= 0xFE) {
fourthByte = iter.nextByte(det);
if (fourthByte >= 0x30 && fourthByte <= 0x39) {
iter.charValue = (iter.charValue << 16) | (thirdByte << 8) | fourthByte;
break buildChar;
}
}
}
iter.error = true;
break buildChar;
}
}
return iter.done == false;
};
// TODO: This set of data comes from the character frequency-
// of-occurence analysis tool. The data needs to be moved
// into a resource and loaded from there.
this.commonChars = [
0xa1a1, 0xa1a2, 0xa1a3, 0xa1a4, 0xa1b0, 0xa1b1, 0xa1f1, 0xa1f3, 0xa3a1, 0xa3ac,
0xa3ba, 0xb1a8, 0xb1b8, 0xb1be, 0xb2bb, 0xb3c9, 0xb3f6, 0xb4f3, 0xb5bd, 0xb5c4,
0xb5e3, 0xb6af, 0xb6d4, 0xb6e0, 0xb7a2, 0xb7a8, 0xb7bd, 0xb7d6, 0xb7dd, 0xb8b4,
0xb8df, 0xb8f6, 0xb9ab, 0xb9c9, 0xb9d8, 0xb9fa, 0xb9fd, 0xbacd, 0xbba7, 0xbbd6,
0xbbe1, 0xbbfa, 0xbcbc, 0xbcdb, 0xbcfe, 0xbdcc, 0xbecd, 0xbedd, 0xbfb4, 0xbfc6,
0xbfc9, 0xc0b4, 0xc0ed, 0xc1cb, 0xc2db, 0xc3c7, 0xc4dc, 0xc4ea, 0xc5cc, 0xc6f7,
0xc7f8, 0xc8ab, 0xc8cb, 0xc8d5, 0xc8e7, 0xc9cf, 0xc9fa, 0xcab1, 0xcab5, 0xcac7,
0xcad0, 0xcad6, 0xcaf5, 0xcafd, 0xccec, 0xcdf8, 0xceaa, 0xcec4, 0xced2, 0xcee5,
0xcfb5, 0xcfc2, 0xcfd6, 0xd0c2, 0xd0c5, 0xd0d0, 0xd0d4, 0xd1a7, 0xd2aa, 0xd2b2,
0xd2b5, 0xd2bb, 0xd2d4, 0xd3c3, 0xd3d0, 0xd3fd, 0xd4c2, 0xd4da, 0xd5e2, 0xd6d0
];
};
util.inherits(module.exports.gb_18030, mbcs);

907
encoding/sbcs.js
View File

@ -1,907 +0,0 @@
var util = require('util'),
Match = require ('../match');
/**
* This class recognizes single-byte encodings. Because the encoding scheme is so
* simple, language statistics are used to do the matching.
*/
function NGramParser(theNgramList, theByteMap) {
var N_GRAM_MASK = 0xFFFFFF;
this.byteIndex = 0;
this.ngram = 0;
this.ngramList = theNgramList;
this.byteMap = theByteMap;
this.ngramCount = 0;
this.hitCount = 0;
this.spaceChar;
/*
* Binary search for value in table, which must have exactly 64 entries.
*/
this.search = function(table, value) {
var index = 0;
if (table[index + 32] <= value) index += 32;
if (table[index + 16] <= value) index += 16;
if (table[index + 8] <= value) index += 8;
if (table[index + 4] <= value) index += 4;
if (table[index + 2] <= value) index += 2;
if (table[index + 1] <= value) index += 1;
if (table[index] > value) index -= 1;
if (index < 0 || table[index] != value)
return -1;
return index;
};
this.lookup = function(thisNgram) {
this.ngramCount += 1;
if (this.search(this.ngramList, thisNgram) >= 0) {
this.hitCount += 1;
}
};
this.addByte = function(b) {
this.ngram = ((this.ngram << 8) + (b & 0xFF)) & N_GRAM_MASK;
this.lookup(this.ngram);
}
this.nextByte = function(det) {
if (this.byteIndex >= det.fInputLen)
return -1;
return det.fInputBytes[this.byteIndex++] & 0xFF;
}
this.parse = function(det, spaceCh) {
var b, ignoreSpace = false;
this.spaceChar = spaceCh;
while ((b = this.nextByte(det)) >= 0) {
var mb = this.byteMap[b];
// TODO: 0x20 might not be a space in all character sets...
if (mb != 0) {
if (!(mb == this.spaceChar && ignoreSpace)) {
this.addByte(mb);
}
ignoreSpace = (mb == this.spaceChar);
}
}
// TODO: Is this OK? The buffer could have ended in the middle of a word...
this.addByte(this.spaceChar);
var rawPercent = this.hitCount / this.ngramCount;
// TODO - This is a bit of a hack to take care of a case
// were we were getting a confidence of 135...
if (rawPercent > 0.33)
return 98;
return Math.floor(rawPercent * 300.0);
};
};
function NGramsPlusLang(la, ng) {
this.fLang = la;
this.fNGrams = ng;
};
function sbcs() {};
sbcs.prototype.spaceChar = 0x20;
sbcs.prototype.ngrams = function() {};
sbcs.prototype.byteMap = function() {};
sbcs.prototype.match = function(det) {
var ngrams = this.ngrams();
var multiple = (Array.isArray(ngrams) && ngrams[0] instanceof NGramsPlusLang);
if (!multiple) {
var parser = new NGramParser(ngrams, this.byteMap());
var confidence = parser.parse(det, this.spaceChar);
return confidence <= 0 ? null : new Match(det, this, confidence);
}
var bestConfidenceSoFar = -1;
var lang = null;
for (var i = ngrams.length - 1; i >= 0; i--) {
var ngl = ngrams[i];
var parser = new NGramParser(ngl.fNGrams, this.byteMap());
var confidence = parser.parse(det, this.spaceChar);
if (confidence > bestConfidenceSoFar) {
bestConfidenceSoFar = confidence;
lang = ngl.fLang;
}
}
var name = this.name(det);
return bestConfidenceSoFar <= 0 ? null : new Match(det, this, bestConfidenceSoFar, name, lang);
};
module.exports.ISO_8859_1 = function() {
this.byteMap = function() {
return [
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0xAA, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0xB5, 0x20, 0x20,
0x20, 0x20, 0xBA, 0x20, 0x20, 0x20, 0x20, 0x20,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
];
};
this.ngrams = function() {
return [
new NGramsPlusLang('da', [
0x206166, 0x206174, 0x206465, 0x20656E, 0x206572, 0x20666F, 0x206861, 0x206920,
0x206D65, 0x206F67, 0x2070E5, 0x207369, 0x207374, 0x207469, 0x207669, 0x616620,
0x616E20, 0x616E64, 0x617220, 0x617420, 0x646520, 0x64656E, 0x646572, 0x646574,
0x652073, 0x656420, 0x656465, 0x656E20, 0x656E64, 0x657220, 0x657265, 0x657320,
0x657420, 0x666F72, 0x676520, 0x67656E, 0x676572, 0x696765, 0x696C20, 0x696E67,
0x6B6520, 0x6B6B65, 0x6C6572, 0x6C6967, 0x6C6C65, 0x6D6564, 0x6E6465, 0x6E6520,
0x6E6720, 0x6E6765, 0x6F6720, 0x6F6D20, 0x6F7220, 0x70E520, 0x722064, 0x722065,
0x722073, 0x726520, 0x737465, 0x742073, 0x746520, 0x746572, 0x74696C, 0x766572
]),
new NGramsPlusLang('de', [
0x20616E, 0x206175, 0x206265, 0x206461, 0x206465, 0x206469, 0x206569, 0x206765,
0x206861, 0x20696E, 0x206D69, 0x207363, 0x207365, 0x20756E, 0x207665, 0x20766F,
0x207765, 0x207A75, 0x626572, 0x636820, 0x636865, 0x636874, 0x646173, 0x64656E,
0x646572, 0x646965, 0x652064, 0x652073, 0x65696E, 0x656974, 0x656E20, 0x657220,
0x657320, 0x67656E, 0x68656E, 0x687420, 0x696368, 0x696520, 0x696E20, 0x696E65,
0x697420, 0x6C6963, 0x6C6C65, 0x6E2061, 0x6E2064, 0x6E2073, 0x6E6420, 0x6E6465,
0x6E6520, 0x6E6720, 0x6E6765, 0x6E7465, 0x722064, 0x726465, 0x726569, 0x736368,
0x737465, 0x742064, 0x746520, 0x74656E, 0x746572, 0x756E64, 0x756E67, 0x766572
]),
new NGramsPlusLang('en', [
0x206120, 0x20616E, 0x206265, 0x20636F, 0x20666F, 0x206861, 0x206865, 0x20696E,
0x206D61, 0x206F66, 0x207072, 0x207265, 0x207361, 0x207374, 0x207468, 0x20746F,
0x207768, 0x616964, 0x616C20, 0x616E20, 0x616E64, 0x617320, 0x617420, 0x617465,
0x617469, 0x642061, 0x642074, 0x652061, 0x652073, 0x652074, 0x656420, 0x656E74,
0x657220, 0x657320, 0x666F72, 0x686174, 0x686520, 0x686572, 0x696420, 0x696E20,
0x696E67, 0x696F6E, 0x697320, 0x6E2061, 0x6E2074, 0x6E6420, 0x6E6720, 0x6E7420,
0x6F6620, 0x6F6E20, 0x6F7220, 0x726520, 0x727320, 0x732061, 0x732074, 0x736169,
0x737420, 0x742074, 0x746572, 0x746861, 0x746865, 0x74696F, 0x746F20, 0x747320
]),
new NGramsPlusLang('es', [
0x206120, 0x206361, 0x20636F, 0x206465, 0x20656C, 0x20656E, 0x206573, 0x20696E,
0x206C61, 0x206C6F, 0x207061, 0x20706F, 0x207072, 0x207175, 0x207265, 0x207365,
0x20756E, 0x207920, 0x612063, 0x612064, 0x612065, 0x61206C, 0x612070, 0x616369,
0x61646F, 0x616C20, 0x617220, 0x617320, 0x6369F3, 0x636F6E, 0x646520, 0x64656C,
0x646F20, 0x652064, 0x652065, 0x65206C, 0x656C20, 0x656E20, 0x656E74, 0x657320,
0x657374, 0x69656E, 0x69F36E, 0x6C6120, 0x6C6F73, 0x6E2065, 0x6E7465, 0x6F2064,
0x6F2065, 0x6F6E20, 0x6F7220, 0x6F7320, 0x706172, 0x717565, 0x726120, 0x726573,
0x732064, 0x732065, 0x732070, 0x736520, 0x746520, 0x746F20, 0x756520, 0xF36E20
]),
new NGramsPlusLang('fr', [
0x206175, 0x20636F, 0x206461, 0x206465, 0x206475, 0x20656E, 0x206574, 0x206C61,
0x206C65, 0x207061, 0x20706F, 0x207072, 0x207175, 0x207365, 0x20736F, 0x20756E,
0x20E020, 0x616E74, 0x617469, 0x636520, 0x636F6E, 0x646520, 0x646573, 0x647520,
0x652061, 0x652063, 0x652064, 0x652065, 0x65206C, 0x652070, 0x652073, 0x656E20,
0x656E74, 0x657220, 0x657320, 0x657420, 0x657572, 0x696F6E, 0x697320, 0x697420,
0x6C6120, 0x6C6520, 0x6C6573, 0x6D656E, 0x6E2064, 0x6E6520, 0x6E7320, 0x6E7420,
0x6F6E20, 0x6F6E74, 0x6F7572, 0x717565, 0x72206C, 0x726520, 0x732061, 0x732064,
0x732065, 0x73206C, 0x732070, 0x742064, 0x746520, 0x74696F, 0x756520, 0x757220
]),
new NGramsPlusLang('it', [
0x20616C, 0x206368, 0x20636F, 0x206465, 0x206469, 0x206520, 0x20696C, 0x20696E,
0x206C61, 0x207065, 0x207072, 0x20756E, 0x612063, 0x612064, 0x612070, 0x612073,
0x61746F, 0x636865, 0x636F6E, 0x64656C, 0x646920, 0x652061, 0x652063, 0x652064,
0x652069, 0x65206C, 0x652070, 0x652073, 0x656C20, 0x656C6C, 0x656E74, 0x657220,
0x686520, 0x692061, 0x692063, 0x692064, 0x692073, 0x696120, 0x696C20, 0x696E20,
0x696F6E, 0x6C6120, 0x6C6520, 0x6C6920, 0x6C6C61, 0x6E6520, 0x6E6920, 0x6E6F20,
0x6E7465, 0x6F2061, 0x6F2064, 0x6F2069, 0x6F2073, 0x6F6E20, 0x6F6E65, 0x706572,
0x726120, 0x726520, 0x736920, 0x746120, 0x746520, 0x746920, 0x746F20, 0x7A696F
]),
new NGramsPlusLang('nl', [
0x20616C, 0x206265, 0x206461, 0x206465, 0x206469, 0x206565, 0x20656E, 0x206765,
0x206865, 0x20696E, 0x206D61, 0x206D65, 0x206F70, 0x207465, 0x207661, 0x207665,
0x20766F, 0x207765, 0x207A69, 0x61616E, 0x616172, 0x616E20, 0x616E64, 0x617220,
0x617420, 0x636874, 0x646520, 0x64656E, 0x646572, 0x652062, 0x652076, 0x65656E,
0x656572, 0x656E20, 0x657220, 0x657273, 0x657420, 0x67656E, 0x686574, 0x696520,
0x696E20, 0x696E67, 0x697320, 0x6E2062, 0x6E2064, 0x6E2065, 0x6E2068, 0x6E206F,
0x6E2076, 0x6E6465, 0x6E6720, 0x6F6E64, 0x6F6F72, 0x6F7020, 0x6F7220, 0x736368,
0x737465, 0x742064, 0x746520, 0x74656E, 0x746572, 0x76616E, 0x766572, 0x766F6F
]),
new NGramsPlusLang('no', [
0x206174, 0x206176, 0x206465, 0x20656E, 0x206572, 0x20666F, 0x206861, 0x206920,
0x206D65, 0x206F67, 0x2070E5, 0x207365, 0x20736B, 0x20736F, 0x207374, 0x207469,
0x207669, 0x20E520, 0x616E64, 0x617220, 0x617420, 0x646520, 0x64656E, 0x646574,
0x652073, 0x656420, 0x656E20, 0x656E65, 0x657220, 0x657265, 0x657420, 0x657474,
0x666F72, 0x67656E, 0x696B6B, 0x696C20, 0x696E67, 0x6B6520, 0x6B6B65, 0x6C6520,
0x6C6C65, 0x6D6564, 0x6D656E, 0x6E2073, 0x6E6520, 0x6E6720, 0x6E6765, 0x6E6E65,
0x6F6720, 0x6F6D20, 0x6F7220, 0x70E520, 0x722073, 0x726520, 0x736F6D, 0x737465,
0x742073, 0x746520, 0x74656E, 0x746572, 0x74696C, 0x747420, 0x747465, 0x766572
]),
new NGramsPlusLang('pt', [
0x206120, 0x20636F, 0x206461, 0x206465, 0x20646F, 0x206520, 0x206573, 0x206D61,
0x206E6F, 0x206F20, 0x207061, 0x20706F, 0x207072, 0x207175, 0x207265, 0x207365,
0x20756D, 0x612061, 0x612063, 0x612064, 0x612070, 0x616465, 0x61646F, 0x616C20,
0x617220, 0x617261, 0x617320, 0x636F6D, 0x636F6E, 0x646120, 0x646520, 0x646F20,
0x646F73, 0x652061, 0x652064, 0x656D20, 0x656E74, 0x657320, 0x657374, 0x696120,
0x696361, 0x6D656E, 0x6E7465, 0x6E746F, 0x6F2061, 0x6F2063, 0x6F2064, 0x6F2065,
0x6F2070, 0x6F7320, 0x706172, 0x717565, 0x726120, 0x726573, 0x732061, 0x732064,
0x732065, 0x732070, 0x737461, 0x746520, 0x746F20, 0x756520, 0xE36F20, 0xE7E36F
]),
new NGramsPlusLang('sv', [
0x206174, 0x206176, 0x206465, 0x20656E, 0x2066F6, 0x206861, 0x206920, 0x20696E,
0x206B6F, 0x206D65, 0x206F63, 0x2070E5, 0x20736B, 0x20736F, 0x207374, 0x207469,
0x207661, 0x207669, 0x20E472, 0x616465, 0x616E20, 0x616E64, 0x617220, 0x617474,
0x636820, 0x646520, 0x64656E, 0x646572, 0x646574, 0x656420, 0x656E20, 0x657220,
0x657420, 0x66F672, 0x67656E, 0x696C6C, 0x696E67, 0x6B6120, 0x6C6C20, 0x6D6564,
0x6E2073, 0x6E6120, 0x6E6465, 0x6E6720, 0x6E6765, 0x6E696E, 0x6F6368, 0x6F6D20,
0x6F6E20, 0x70E520, 0x722061, 0x722073, 0x726120, 0x736B61, 0x736F6D, 0x742073,
0x746120, 0x746520, 0x746572, 0x74696C, 0x747420, 0x766172, 0xE47220, 0xF67220,
])
];
};
this.name = function(det) {
return (det && det.fC1Bytes) ? 'windows-1252' : 'ISO-8859-1';
};
};
util.inherits(module.exports.ISO_8859_1, sbcs);
module.exports.ISO_8859_2 = function() {
this.byteMap = function() {
return [
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0xB1, 0x20, 0xB3, 0x20, 0xB5, 0xB6, 0x20,
0x20, 0xB9, 0xBA, 0xBB, 0xBC, 0x20, 0xBE, 0xBF,
0x20, 0xB1, 0x20, 0xB3, 0x20, 0xB5, 0xB6, 0xB7,
0x20, 0xB9, 0xBA, 0xBB, 0xBC, 0x20, 0xBE, 0xBF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0x20
];
}
this.ngrams = function() {
return [
new NGramsPlusLang('cs', [
0x206120, 0x206279, 0x20646F, 0x206A65, 0x206E61, 0x206E65, 0x206F20, 0x206F64,
0x20706F, 0x207072, 0x2070F8, 0x20726F, 0x207365, 0x20736F, 0x207374, 0x20746F,
0x207620, 0x207679, 0x207A61, 0x612070, 0x636520, 0x636820, 0x652070, 0x652073,
0x652076, 0x656D20, 0x656EED, 0x686F20, 0x686F64, 0x697374, 0x6A6520, 0x6B7465,
0x6C6520, 0x6C6920, 0x6E6120, 0x6EE920, 0x6EEC20, 0x6EED20, 0x6F2070, 0x6F646E,
0x6F6A69, 0x6F7374, 0x6F7520, 0x6F7661, 0x706F64, 0x706F6A, 0x70726F, 0x70F865,
0x736520, 0x736F75, 0x737461, 0x737469, 0x73746E, 0x746572, 0x746EED, 0x746F20,
0x752070, 0xBE6520, 0xE16EED, 0xE9686F, 0xED2070, 0xED2073, 0xED6D20, 0xF86564,
]),
new NGramsPlusLang('hu', [
0x206120, 0x20617A, 0x206265, 0x206567, 0x20656C, 0x206665, 0x206861, 0x20686F,
0x206973, 0x206B65, 0x206B69, 0x206BF6, 0x206C65, 0x206D61, 0x206D65, 0x206D69,
0x206E65, 0x20737A, 0x207465, 0x20E973, 0x612061, 0x61206B, 0x61206D, 0x612073,
0x616B20, 0x616E20, 0x617A20, 0x62616E, 0x62656E, 0x656779, 0x656B20, 0x656C20,
0x656C65, 0x656D20, 0x656E20, 0x657265, 0x657420, 0x657465, 0x657474, 0x677920,
0x686F67, 0x696E74, 0x697320, 0x6B2061, 0x6BF67A, 0x6D6567, 0x6D696E, 0x6E2061,
0x6E616B, 0x6E656B, 0x6E656D, 0x6E7420, 0x6F6779, 0x732061, 0x737A65, 0x737A74,
0x737AE1, 0x73E967, 0x742061, 0x747420, 0x74E173, 0x7A6572, 0xE16E20, 0xE97320,
]),
new NGramsPlusLang('pl', [
0x20637A, 0x20646F, 0x206920, 0x206A65, 0x206B6F, 0x206D61, 0x206D69, 0x206E61,
0x206E69, 0x206F64, 0x20706F, 0x207072, 0x207369, 0x207720, 0x207769, 0x207779,
0x207A20, 0x207A61, 0x612070, 0x612077, 0x616E69, 0x636820, 0x637A65, 0x637A79,
0x646F20, 0x647A69, 0x652070, 0x652073, 0x652077, 0x65207A, 0x65676F, 0x656A20,
0x656D20, 0x656E69, 0x676F20, 0x696120, 0x696520, 0x69656A, 0x6B6120, 0x6B6920,
0x6B6965, 0x6D6965, 0x6E6120, 0x6E6961, 0x6E6965, 0x6F2070, 0x6F7761, 0x6F7769,
0x706F6C, 0x707261, 0x70726F, 0x70727A, 0x727A65, 0x727A79, 0x7369EA, 0x736B69,
0x737461, 0x776965, 0x796368, 0x796D20, 0x7A6520, 0x7A6965, 0x7A7920, 0xF37720,
]),
new NGramsPlusLang('ro', [
0x206120, 0x206163, 0x206361, 0x206365, 0x20636F, 0x206375, 0x206465, 0x206469,
0x206C61, 0x206D61, 0x207065, 0x207072, 0x207365, 0x2073E3, 0x20756E, 0x20BA69,
0x20EE6E, 0x612063, 0x612064, 0x617265, 0x617420, 0x617465, 0x617520, 0x636172,
0x636F6E, 0x637520, 0x63E320, 0x646520, 0x652061, 0x652063, 0x652064, 0x652070,
0x652073, 0x656120, 0x656920, 0x656C65, 0x656E74, 0x657374, 0x692061, 0x692063,
0x692064, 0x692070, 0x696520, 0x696920, 0x696E20, 0x6C6120, 0x6C6520, 0x6C6F72,
0x6C7569, 0x6E6520, 0x6E7472, 0x6F7220, 0x70656E, 0x726520, 0x726561, 0x727520,
0x73E320, 0x746520, 0x747275, 0x74E320, 0x756920, 0x756C20, 0xBA6920, 0xEE6E20,
])
];
};
this.name = function(det) {
return (det && det.fC1Bytes) ? 'windows-1250' : 'ISO-8859-2';
};
};
util.inherits(module.exports.ISO_8859_2, sbcs);
module.exports.ISO_8859_5 = function() {
this.byteMap = function() {
return [
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0x20, 0xFE, 0xFF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0x20, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0x20, 0xFE, 0xFF
];
};
this.ngrams = function() {
return [
0x20D220, 0x20D2DE, 0x20D4DE, 0x20D7D0, 0x20D820, 0x20DAD0, 0x20DADE, 0x20DDD0,
0x20DDD5, 0x20DED1, 0x20DFDE, 0x20DFE0, 0x20E0D0, 0x20E1DE, 0x20E1E2, 0x20E2DE,
0x20E7E2, 0x20EDE2, 0xD0DDD8, 0xD0E2EC, 0xD3DE20, 0xD5DBEC, 0xD5DDD8, 0xD5E1E2,
0xD5E220, 0xD820DF, 0xD8D520, 0xD8D820, 0xD8EF20, 0xDBD5DD, 0xDBD820, 0xDBECDD,
0xDDD020, 0xDDD520, 0xDDD8D5, 0xDDD8EF, 0xDDDE20, 0xDDDED2, 0xDE20D2, 0xDE20DF,
0xDE20E1, 0xDED220, 0xDED2D0, 0xDED3DE, 0xDED920, 0xDEDBEC, 0xDEDC20, 0xDEE1E2,
0xDFDEDB, 0xDFE0D5, 0xDFE0D8, 0xDFE0DE, 0xE0D0D2, 0xE0D5D4, 0xE1E2D0, 0xE1E2D2,
0xE1E2D8, 0xE1EF20, 0xE2D5DB, 0xE2DE20, 0xE2DEE0, 0xE2EC20, 0xE7E2DE, 0xEBE520
];
};
this.name = function(det) {
return 'ISO-8859-5';
};
this.language = function() {
return 'ru';
};
};
util.inherits(module.exports.ISO_8859_5, sbcs);
module.exports.ISO_8859_6 = function() {
this.byteMap = function() {
return [
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xD9, 0xDA, 0x20, 0x20, 0x20, 0x20, 0x20,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20
];
};
this.ngrams = function() {
return [
0x20C7E4, 0x20C7E6, 0x20C8C7, 0x20D9E4, 0x20E1EA, 0x20E4E4, 0x20E5E6, 0x20E8C7,
0xC720C7, 0xC7C120, 0xC7CA20, 0xC7D120, 0xC7E420, 0xC7E4C3, 0xC7E4C7, 0xC7E4C8,
0xC7E4CA, 0xC7E4CC, 0xC7E4CD, 0xC7E4CF, 0xC7E4D3, 0xC7E4D9, 0xC7E4E2, 0xC7E4E5,
0xC7E4E8, 0xC7E4EA, 0xC7E520, 0xC7E620, 0xC7E6CA, 0xC820C7, 0xC920C7, 0xC920E1,
0xC920E4, 0xC920E5, 0xC920E8, 0xCA20C7, 0xCF20C7, 0xCFC920, 0xD120C7, 0xD1C920,
0xD320C7, 0xD920C7, 0xD9E4E9, 0xE1EA20, 0xE420C7, 0xE4C920, 0xE4E920, 0xE4EA20,
0xE520C7, 0xE5C720, 0xE5C920, 0xE5E620, 0xE620C7, 0xE720C7, 0xE7C720, 0xE8C7E4,
0xE8E620, 0xE920C7, 0xEA20C7, 0xEA20E5, 0xEA20E8, 0xEAC920, 0xEAD120, 0xEAE620
];
};
this.name = function(det) {
return 'ISO-8859-6';
};
this.language = function() {
return 'ar';
};
};
util.inherits(module.exports.ISO_8859_6, sbcs);
module.exports.ISO_8859_7 = function() {
this.byteMap = function() {
return [
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0xA1, 0xA2, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xDC, 0x20,
0xDD, 0xDE, 0xDF, 0x20, 0xFC, 0x20, 0xFD, 0xFE,
0xC0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0x20, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xDC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0x20
];
};
this.ngrams = function() {
return [
0x20E1ED, 0x20E1F0, 0x20E3E9, 0x20E4E9, 0x20E5F0, 0x20E720, 0x20EAE1, 0x20ECE5,
0x20EDE1, 0x20EF20, 0x20F0E1, 0x20F0EF, 0x20F0F1, 0x20F3F4, 0x20F3F5, 0x20F4E7,
0x20F4EF, 0xDFE120, 0xE120E1, 0xE120F4, 0xE1E920, 0xE1ED20, 0xE1F0FC, 0xE1F220,
0xE3E9E1, 0xE5E920, 0xE5F220, 0xE720F4, 0xE7ED20, 0xE7F220, 0xE920F4, 0xE9E120,
0xE9EADE, 0xE9F220, 0xEAE1E9, 0xEAE1F4, 0xECE520, 0xED20E1, 0xED20E5, 0xED20F0,
0xEDE120, 0xEFF220, 0xEFF520, 0xF0EFF5, 0xF0F1EF, 0xF0FC20, 0xF220E1, 0xF220E5,
0xF220EA, 0xF220F0, 0xF220F4, 0xF3E520, 0xF3E720, 0xF3F4EF, 0xF4E120, 0xF4E1E9,
0xF4E7ED, 0xF4E7F2, 0xF4E9EA, 0xF4EF20, 0xF4EFF5, 0xF4F9ED, 0xF9ED20, 0xFEED20
];
};
this.name = function(det) {
return (det && det.fC1Bytes) ? 'windows-1253' : 'ISO-8859-7';
};
this.language = function() {
return 'el';
};
};
util.inherits(module.exports.ISO_8859_7, sbcs);
module.exports.ISO_8859_8 = function() {
this.byteMap = function() {
return [
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0x20, 0x20, 0x20, 0x20, 0x20
];
};
this.ngrams = function() {
return [
new NGramsPlusLang('he', [
0x20E0E5, 0x20E0E7, 0x20E0E9, 0x20E0FA, 0x20E1E9, 0x20E1EE, 0x20E4E0, 0x20E4E5,
0x20E4E9, 0x20E4EE, 0x20E4F2, 0x20E4F9, 0x20E4FA, 0x20ECE0, 0x20ECE4, 0x20EEE0,
0x20F2EC, 0x20F9EC, 0xE0FA20, 0xE420E0, 0xE420E1, 0xE420E4, 0xE420EC, 0xE420EE,
0xE420F9, 0xE4E5E0, 0xE5E020, 0xE5ED20, 0xE5EF20, 0xE5F820, 0xE5FA20, 0xE920E4,
0xE9E420, 0xE9E5FA, 0xE9E9ED, 0xE9ED20, 0xE9EF20, 0xE9F820, 0xE9FA20, 0xEC20E0,
0xEC20E4, 0xECE020, 0xECE420, 0xED20E0, 0xED20E1, 0xED20E4, 0xED20EC, 0xED20EE,
0xED20F9, 0xEEE420, 0xEF20E4, 0xF0E420, 0xF0E920, 0xF0E9ED, 0xF2EC20, 0xF820E4,
0xF8E9ED, 0xF9EC20, 0xFA20E0, 0xFA20E1, 0xFA20E4, 0xFA20EC, 0xFA20EE, 0xFA20F9,
]),
new NGramsPlusLang('he', [
0x20E0E5, 0x20E0EC, 0x20E4E9, 0x20E4EC, 0x20E4EE, 0x20E4F0, 0x20E9F0, 0x20ECF2,
0x20ECF9, 0x20EDE5, 0x20EDE9, 0x20EFE5, 0x20EFE9, 0x20F8E5, 0x20F8E9, 0x20FAE0,
0x20FAE5, 0x20FAE9, 0xE020E4, 0xE020EC, 0xE020ED, 0xE020FA, 0xE0E420, 0xE0E5E4,
0xE0EC20, 0xE0EE20, 0xE120E4, 0xE120ED, 0xE120FA, 0xE420E4, 0xE420E9, 0xE420EC,
0xE420ED, 0xE420EF, 0xE420F8, 0xE420FA, 0xE4EC20, 0xE5E020, 0xE5E420, 0xE7E020,
0xE9E020, 0xE9E120, 0xE9E420, 0xEC20E4, 0xEC20ED, 0xEC20FA, 0xECF220, 0xECF920,
0xEDE9E9, 0xEDE9F0, 0xEDE9F8, 0xEE20E4, 0xEE20ED, 0xEE20FA, 0xEEE120, 0xEEE420,
0xF2E420, 0xF920E4, 0xF920ED, 0xF920FA, 0xF9E420, 0xFAE020, 0xFAE420, 0xFAE5E9,
])
];
};
this.name = function(det) {
return (det && det.fC1Bytes) ? 'windows-1255' : 'ISO-8859-8';
};
this.language = function() {
return 'he';
};
};
util.inherits(module.exports.ISO_8859_8, sbcs);
module.exports.ISO_8859_9 = function() {
this.byteMap = function() {
return [
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0x20, 0x20, 0x20, 0x20, 0x20, 0xB5, 0x20, 0x20,
0x20, 0x20, 0xBA, 0x20, 0x20, 0x20, 0x20, 0x20,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0x69, 0xFE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0x20,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
];
};
this.ngrams = function() {
return [
0x206261, 0x206269, 0x206275, 0x206461, 0x206465, 0x206765, 0x206861, 0x20696C,
0x206B61, 0x206B6F, 0x206D61, 0x206F6C, 0x207361, 0x207461, 0x207665, 0x207961,
0x612062, 0x616B20, 0x616C61, 0x616D61, 0x616E20, 0x616EFD, 0x617220, 0x617261,
0x6172FD, 0x6173FD, 0x617961, 0x626972, 0x646120, 0x646520, 0x646920, 0x652062,
0x65206B, 0x656469, 0x656E20, 0x657220, 0x657269, 0x657369, 0x696C65, 0x696E20,
0x696E69, 0x697220, 0x6C616E, 0x6C6172, 0x6C6520, 0x6C6572, 0x6E2061, 0x6E2062,
0x6E206B, 0x6E6461, 0x6E6465, 0x6E6520, 0x6E6920, 0x6E696E, 0x6EFD20, 0x72696E,
0x72FD6E, 0x766520, 0x796120, 0x796F72, 0xFD6E20, 0xFD6E64, 0xFD6EFD, 0xFDF0FD
];
};
this.name = function(det) {
return (det && det.fC1Bytes) ? 'windows-1254' : 'ISO-8859-9';
};
this.language = function() {
return 'tr';
};
};
util.inherits(module.exports.ISO_8859_9, sbcs);
module.exports.windows_1251 = function() {
this.byteMap = function() {
return [
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0x20, 0xA2, 0xA2, 0xBC, 0x20, 0xB4, 0x20, 0x20,
0xB8, 0x20, 0xBA, 0x20, 0x20, 0x20, 0x20, 0xBF,
0x20, 0x20, 0xB3, 0xB3, 0xB4, 0xB5, 0x20, 0x20,
0xB8, 0x20, 0xBA, 0x20, 0xBC, 0xBE, 0xBE, 0xBF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
];
};
this.ngrams = function() {
return [
0x20E220, 0x20E2EE, 0x20E4EE, 0x20E7E0, 0x20E820, 0x20EAE0, 0x20EAEE, 0x20EDE0,
0x20EDE5, 0x20EEE1, 0x20EFEE, 0x20EFF0, 0x20F0E0, 0x20F1EE, 0x20F1F2, 0x20F2EE,
0x20F7F2, 0x20FDF2, 0xE0EDE8, 0xE0F2FC, 0xE3EE20, 0xE5EBFC, 0xE5EDE8, 0xE5F1F2,
0xE5F220, 0xE820EF, 0xE8E520, 0xE8E820, 0xE8FF20, 0xEBE5ED, 0xEBE820, 0xEBFCED,
0xEDE020, 0xEDE520, 0xEDE8E5, 0xEDE8FF, 0xEDEE20, 0xEDEEE2, 0xEE20E2, 0xEE20EF,
0xEE20F1, 0xEEE220, 0xEEE2E0, 0xEEE3EE, 0xEEE920, 0xEEEBFC, 0xEEEC20, 0xEEF1F2,
0xEFEEEB, 0xEFF0E5, 0xEFF0E8, 0xEFF0EE, 0xF0E0E2, 0xF0E5E4, 0xF1F2E0, 0xF1F2E2,
0xF1F2E8, 0xF1FF20, 0xF2E5EB, 0xF2EE20, 0xF2EEF0, 0xF2FC20, 0xF7F2EE, 0xFBF520
];
};
this.name = function(det) {
return 'windows-1251';
};
this.language = function() {
return 'ru';
};
};
util.inherits(module.exports.windows_1251, sbcs);
module.exports.windows_1256 = function() {
this.byteMap = function() {
return [
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0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0x20,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
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0x20, 0xF9, 0x20, 0xFB, 0xFC, 0x20, 0x20, 0xFF
];
};
this.ngrams = function() {
return [
0x20C7E1, 0x20C7E4, 0x20C8C7, 0x20DAE1, 0x20DDED, 0x20E1E1, 0x20E3E4, 0x20E6C7,
0xC720C7, 0xC7C120, 0xC7CA20, 0xC7D120, 0xC7E120, 0xC7E1C3, 0xC7E1C7, 0xC7E1C8,
0xC7E1CA, 0xC7E1CC, 0xC7E1CD, 0xC7E1CF, 0xC7E1D3, 0xC7E1DA, 0xC7E1DE, 0xC7E1E3,
0xC7E1E6, 0xC7E1ED, 0xC7E320, 0xC7E420, 0xC7E4CA, 0xC820C7, 0xC920C7, 0xC920DD,
0xC920E1, 0xC920E3, 0xC920E6, 0xCA20C7, 0xCF20C7, 0xCFC920, 0xD120C7, 0xD1C920,
0xD320C7, 0xDA20C7, 0xDAE1EC, 0xDDED20, 0xE120C7, 0xE1C920, 0xE1EC20, 0xE1ED20,
0xE320C7, 0xE3C720, 0xE3C920, 0xE3E420, 0xE420C7, 0xE520C7, 0xE5C720, 0xE6C7E1,
0xE6E420, 0xEC20C7, 0xED20C7, 0xED20E3, 0xED20E6, 0xEDC920, 0xEDD120, 0xEDE420
];
};
this.name = function(det) {
return 'windows-1256';
};
this.language = function() {
return 'ar';
};
};
util.inherits(module.exports.windows_1256, sbcs);
module.exports.KOI8_R = function() {
this.byteMap = function() {
return [
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0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF
];
};
this.ngrams = function() {
return [
0x20C4CF, 0x20C920, 0x20CBC1, 0x20CBCF, 0x20CEC1, 0x20CEC5, 0x20CFC2, 0x20D0CF,
0x20D0D2, 0x20D2C1, 0x20D3CF, 0x20D3D4, 0x20D4CF, 0x20D720, 0x20D7CF, 0x20DAC1,
0x20DCD4, 0x20DED4, 0xC1CEC9, 0xC1D4D8, 0xC5CCD8, 0xC5CEC9, 0xC5D3D4, 0xC5D420,
0xC7CF20, 0xC920D0, 0xC9C520, 0xC9C920, 0xC9D120, 0xCCC5CE, 0xCCC920, 0xCCD8CE,
0xCEC120, 0xCEC520, 0xCEC9C5, 0xCEC9D1, 0xCECF20, 0xCECFD7, 0xCF20D0, 0xCF20D3,
0xCF20D7, 0xCFC7CF, 0xCFCA20, 0xCFCCD8, 0xCFCD20, 0xCFD3D4, 0xCFD720, 0xCFD7C1,
0xD0CFCC, 0xD0D2C5, 0xD0D2C9, 0xD0D2CF, 0xD2C1D7, 0xD2C5C4, 0xD3D120, 0xD3D4C1,
0xD3D4C9, 0xD3D4D7, 0xD4C5CC, 0xD4CF20, 0xD4CFD2, 0xD4D820, 0xD9C820, 0xDED4CF
];
};
this.name = function(det) {
return 'KOI8-R';
};
this.language = function() {
return 'ru';
};
};
util.inherits(module.exports.KOI8_R, sbcs);
/*
module.exports.ISO_8859_7 = function() {
this.byteMap = function() {
return [
];
};
this.ngrams = function() {
return [
];
};
this.name = function(det) {
if (typeof det == 'undefined')
return 'ISO-8859-7';
return det.fC1Bytes ? 'windows-1253' : 'ISO-8859-7';
};
this.language = function() {
return 'el';
};
};
util.inherits(module.exports.ISO_8859_7, sbcs);
*/

112
encoding/unicode.js
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@ -1,112 +0,0 @@
'use strict';
var util = require('util'),
Match = require ('../match');
/**
* This class matches UTF-16 and UTF-32, both big- and little-endian. The
* BOM will be used if it is present.
*/
module.exports.UTF_16BE = function() {
this.name = function() {
return 'UTF-16BE';
};
this.match = function(det) {
var input = det.fRawInput;
if (input.length >= 2 && ((input[0] & 0xff) == 0xfe && (input[1] & 0xff) == 0xff)) {
return new Match(det, this, 100); // confidence = 100
}
// TODO: Do some statistics to check for unsigned UTF-16BE
return null;
};
};
module.exports.UTF_16LE = function() {
this.name = function() {
return 'UTF-16LE';
};
this.match = function(det) {
var input = det.fRawInput;
if (input.length >= 2 && ((input[0] & 0xff) == 0xff && (input[1] & 0xff) == 0xfe)) {
// LE BOM is present.
if (input.length >= 4 && input[2] == 0x00 && input[3] == 0x00) {
// It is probably UTF-32 LE, not UTF-16
return null;
}
return new Match(det, this, 100); // confidence = 100
}
// TODO: Do some statistics to check for unsigned UTF-16LE
return null;
}
};
function UTF_32() {};
UTF_32.prototype.match = function(det) {
var input = det.fRawInput,
limit = (det.fRawLength / 4) * 4,
numValid = 0,
numInvalid = 0,
hasBOM = false,
confidence = 0;
if (limit == 0) {
return null;
}
if (this.getChar(input, 0) == 0x0000FEFF) {
hasBOM = true;
}
for (var i = 0; i < limit; i += 4) {
var ch = this.getChar(input, i);
if (ch < 0 || ch >= 0x10FFFF || (ch >= 0xD800 && ch <= 0xDFFF)) {
numInvalid += 1;
} else {
numValid += 1;
}
}
// Cook up some sort of confidence score, based on presence of a BOM
// and the existence of valid and/or invalid multi-byte sequences.
if (hasBOM && numInvalid == 0) {
confidence = 100;
} else if (hasBOM && numValid > numInvalid * 10) {
confidence = 80;
} else if (numValid > 3 && numInvalid == 0) {
confidence = 100;
} else if (numValid > 0 && numInvalid == 0) {
confidence = 80;
} else if (numValid > numInvalid * 10) {
// Probably corrupt UTF-32BE data. Valid sequences aren't likely by chance.
confidence = 25;
}
// return confidence == 0 ? null : new CharsetMatch(det, this, confidence);
return confidence == 0 ? null : new Match(det, this, confidence);
};
module.exports.UTF_32BE = function() {
this.name = function() {
return 'UTF-32BE';
};
this.getChar = function(input, index) {
return (input[index + 0] & 0xff) << 24 | (input[index + 1] & 0xff) << 16 |
(input[index + 2] & 0xff) << 8 | (input[index + 3] & 0xff);
};
};
util.inherits(module.exports.UTF_32BE, UTF_32);
module.exports.UTF_32LE = function() {
this.name = function() {
return 'UTF-32LE';
};
this.getChar = function(input, index) {
return (input[index + 3] & 0xff) << 24 | (input[index + 2] & 0xff) << 16 |
(input[index + 1] & 0xff) << 8 | (input[index + 0] & 0xff);
};
};
util.inherits(module.exports.UTF_32LE, UTF_32);

151
index.js
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@ -1,151 +0,0 @@
var fs = require('fs');
var utf8 = require('./encoding/utf8'),
unicode = require('./encoding/unicode'),
mbcs = require('./encoding/mbcs'),
sbcs = require('./encoding/sbcs'),
iso2022 = require('./encoding/iso2022');
var self = this;
var recognisers = [
new utf8,
new unicode.UTF_16BE,
new unicode.UTF_16LE,
new unicode.UTF_32BE,
new unicode.UTF_32LE,
new mbcs.sjis,
new mbcs.big5,
new mbcs.euc_jp,
new mbcs.euc_kr,
new mbcs.gb_18030,
new iso2022.ISO_2022_JP,
new iso2022.ISO_2022_KR,
new iso2022.ISO_2022_CN,
new sbcs.ISO_8859_1,
new sbcs.ISO_8859_2,
new sbcs.ISO_8859_5,
new sbcs.ISO_8859_6,
new sbcs.ISO_8859_7,
new sbcs.ISO_8859_8,
new sbcs.ISO_8859_9,
new sbcs.windows_1251,
new sbcs.windows_1256,
new sbcs.KOI8_R
];
module.exports.detect = function(buffer, opts) {
// Tally up the byte occurence statistics.
var fByteStats = [];
for (var i = 0; i < 256; i++)
fByteStats[i] = 0;
for (var i = buffer.length - 1; i >= 0; i--)
fByteStats[buffer[i] & 0x00ff]++;
var fC1Bytes = false;
for (var i = 0x80; i <= 0x9F; i += 1) {
if (fByteStats[i] != 0) {
fC1Bytes = true;
break;
}
}
var context = {
fByteStats: fByteStats,
fC1Bytes: fC1Bytes,
fRawInput: buffer,
fRawLength: buffer.length,
fInputBytes: buffer,
fInputLen: buffer.length
};
var matches = recognisers.map(function(rec) {
return rec.match(context);
}).filter(function(match) {
return !!match;
}).sort(function(a, b) {
return b.confidence - a.confidence;
});
if (opts && opts.returnAllMatches === true) {
return matches;
}
else {
return matches.length > 0 ? matches[0].name : null;
}
};
module.exports.detectFile = function(filepath, opts, cb) {
if (typeof opts === 'function') {
cb = opts;
opts = undefined;
}
var fd;
var handler = function(err, buffer) {
if (fd) {
fs.closeSync(fd);
}
if (err) return cb(err, null);
cb(null, self.detect(buffer, opts));
};
if (opts && opts.sampleSize) {
fd = fs.openSync(filepath, 'r'),
sample = Buffer.allocUnsafe(opts.sampleSize);
fs.read(fd, sample, 0, opts.sampleSize, null, function(err) {
handler(err, sample);
});
return;
}
fs.readFile(filepath, handler);
};
module.exports.detectFileSync = function(filepath, opts) {
if (opts && opts.sampleSize) {
var fd = fs.openSync(filepath, 'r'),
sample = Buffer.allocUnsafe(opts.sampleSize);
fs.readSync(fd, sample, 0, opts.sampleSize);
fs.closeSync(fd);
return self.detect(sample, opts);
}
return self.detect(fs.readFileSync(filepath), opts);
};
// Wrappers for the previous functions to return all encodings
module.exports.detectAll = function(buffer, opts) {
if (typeof opts !== 'object') {
opts = {};
}
opts.returnAllMatches = true;
return self.detect(buffer, opts);
}
module.exports.detectFileAll = function(filepath, opts, cb) {
if (typeof opts === 'function') {
cb = opts;
opts = undefined;
}
if (typeof opts !== 'object') {
opts = {};
}
opts.returnAllMatches = true;
self.detectFile(filepath, opts, cb);
}
module.exports.detectFileAllSync = function(filepath, opts) {
if (typeof opts !== 'object') {
opts = {};
}
opts.returnAllMatches = true;
return self.detectFileSync(filepath, opts);
}

9
jest.config.js Normal file
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@ -0,0 +1,9 @@
module.exports = {
testEnvironment: 'node',
testRegex: '.*test.ts$',
transform: { '^.+\\.ts?$': 'ts-jest' },
moduleFileExtensions: ['ts', 'js', 'json'],
rootDir: 'src',
collectCoverage: true,
coverageDirectory: '<rootDir>/../coverage',
};

6
match.js
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@ -1,6 +0,0 @@
module.exports = function(det, rec, confidence, name, lang) {
this.confidence = confidence;
this.name = name || rec.name(det);
this.lang = lang;
};

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65
package.json
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@ -3,6 +3,44 @@
"version": "0.0.0-development", "version": "0.0.0-development",
"homepage": "https://github.com/runk/node-chardet", "homepage": "https://github.com/runk/node-chardet",
"description": "Character detector", "description": "Character detector",
"license": "MIT",
"repository": {
"type": "git",
"url": "https://github.com/runk/node-chardet.git"
},
"bugs": {
"mail": "deadrunk@gmail.com",
"url": "http://github.com/runk/node-chardet/issues"
},
"scripts": {
"build": "rm -rf lib/* && tsc",
"lint": "tslint -p tsconfig.json -c tslint.json",
"lint:types": "tsc --noEmit",
"format": "prettier --write ./src/**/*.ts",
"format:check": "prettier --list-different ./src/**/*.ts",
"test": "jest",
"prepublish": "npm run build",
"semantic-release": "semantic-release"
},
"main": "lib/index.js",
"typings": "lib/index.d.ts",
"engine": {
"node": ">=4"
},
"readmeFilename": "README.md",
"directories": {
"test": "test"
},
"devDependencies": {
"@types/jest": "^25.1.4",
"@types/node": "^13.9.5",
"jest": "^25.2.4",
"prettier": "^2.0.2",
"semantic-release": "^15.14.0",
"ts-jest": "^25.2.1",
"tslint": "^6.1.0",
"typescript": "^3.8.3"
},
"keywords": [ "keywords": [
"encoding", "encoding",
"character", "character",
@ -18,30 +56,5 @@
"@suisho", "@suisho",
"@seangarner", "@seangarner",
"@zevanty" "@zevanty"
], ]
"devDependencies": {
"mocha": "^6.1.4",
"semantic-release": "^15.13.18"
},
"repository": {
"type": "git",
"url": "https://github.com/runk/node-chardet.git"
},
"bugs": {
"mail": "deadrunk@gmail.com",
"url": "http://github.com/runk/node-chardet/issues"
},
"scripts": {
"test": "mocha -R spec --recursive --bail",
"semantic-release": "semantic-release"
},
"main": "index.js",
"engine": {
"node": ">=4"
},
"readmeFilename": "README.md",
"directories": {
"test": "test"
},
"license": "MIT"
} }

13
renovate.json Normal file
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@ -0,0 +1,13 @@
{
"extends": ["config:base"],
"packageRules": [
{
"updateTypes": ["minor", "patch", "pin", "digest"],
"automerge": true
},
{
"depTypeList": ["devDependencies"],
"automerge": true
}
]
}

16
src/encoding/index.ts Normal file
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import { Match } from '../match';
export interface Recogniser {
match(input: Context): Match | null;
name(input?: Context): string;
language?(): string;
}
export interface Context {
fByteStats: number[];
fC1Bytes: boolean;
fRawInput: Buffer;
fRawLength: number;
fInputBytes: Buffer;
fInputLen: number;
}

17
src/encoding/iso2022.test.ts Normal file
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import * as chardet from '..';
describe('ISO-2022', () => {
var base = __dirname + '/../test/data/encodings';
it('should return ISO-2022-JP', () => {
expect(chardet.detectFileSync(base + '/iso2022jp')).toBe('ISO-2022-JP');
});
it('should return ISO-2022-KR', () => {
expect(chardet.detectFileSync(base + '/iso2022kr')).toBe('ISO-2022-KR');
});
it('should return ISO-2022-CN', () => {
expect(chardet.detectFileSync(base + '/iso2022cn')).toBe('ISO-2022-CN');
});
});

132
src/encoding/iso2022.ts Normal file
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import { Context, Recogniser } from '.';
var match = require('../match').default;
/**
* This is a superclass for the individual detectors for
* each of the detectable members of the ISO 2022 family
* of encodings.
*/
class ISO_2022 implements Recogniser {
escapeSequences: number[][] = [];
name() {
return 'ISO_2022';
}
match(det: Context) {
/**
* Matching function shared among the 2022 detectors JP, CN and KR
* Counts up the number of legal an unrecognized escape sequences in
* the sample of text, and computes a score based on the total number &
* the proportion that fit the encoding.
*
*
* @param text the byte buffer containing text to analyse
* @param textLen the size of the text in the byte.
* @param escapeSequences the byte escape sequences to test for.
* @return match quality, in the range of 0-100.
*/
var i, j;
var escN;
var hits = 0;
var misses = 0;
var shifts = 0;
var quality;
// TODO: refactor me
var text = det.fInputBytes;
var textLen = det.fInputLen;
scanInput: for (i = 0; i < textLen; i++) {
if (text[i] == 0x1b) {
checkEscapes: for (
escN = 0;
escN < this.escapeSequences.length;
escN++
) {
var seq = this.escapeSequences[escN];
if (textLen - i < seq.length) continue checkEscapes;
for (j = 1; j < seq.length; j++)
if (seq[j] != text[i + j]) continue checkEscapes;
hits++;
i += seq.length - 1;
continue scanInput;
}
misses++;
}
// Shift in/out
if (text[i] == 0x0e || text[i] == 0x0f) shifts++;
}
if (hits == 0) return null;
//
// Initial quality is based on relative proportion of recognized vs.
// unrecognized escape sequences.
// All good: quality = 100;
// half or less good: quality = 0;
// linear in between.
quality = (100 * hits - 100 * misses) / (hits + misses);
// Back off quality if there were too few escape sequences seen.
// Include shifts in this computation, so that KR does not get penalized
// for having only a single Escape sequence, but many shifts.
if (hits + shifts < 5) quality -= (5 - (hits + shifts)) * 10;
return quality <= 0 ? null : match(det, this, quality);
}
}
export class ISO_2022_JP extends ISO_2022 {
name() {
return 'ISO-2022-JP';
}
escapeSequences = [
[0x1b, 0x24, 0x28, 0x43], // KS X 1001:1992
[0x1b, 0x24, 0x28, 0x44], // JIS X 212-1990
[0x1b, 0x24, 0x40], // JIS C 6226-1978
[0x1b, 0x24, 0x41], // GB 2312-80
[0x1b, 0x24, 0x42], // JIS X 208-1983
[0x1b, 0x26, 0x40], // JIS X 208 1990, 1997
[0x1b, 0x28, 0x42], // ASCII
[0x1b, 0x28, 0x48], // JIS-Roman
[0x1b, 0x28, 0x49], // Half-width katakana
[0x1b, 0x28, 0x4a], // JIS-Roman
[0x1b, 0x2e, 0x41], // ISO 8859-1
[0x1b, 0x2e, 0x46], // ISO 8859-7
];
}
export class ISO_2022_KR extends ISO_2022 {
name() {
return 'ISO-2022-KR';
}
escapeSequences = [[0x1b, 0x24, 0x29, 0x43]];
}
export class ISO_2022_CN extends ISO_2022 {
name() {
return 'ISO-2022-CN';
}
escapeSequences = [
[0x1b, 0x24, 0x29, 0x41], // GB 2312-80
[0x1b, 0x24, 0x29, 0x47], // CNS 11643-1992 Plane 1
[0x1b, 0x24, 0x2a, 0x48], // CNS 11643-1992 Plane 2
[0x1b, 0x24, 0x29, 0x45], // ISO-IR-165
[0x1b, 0x24, 0x2b, 0x49], // CNS 11643-1992 Plane 3
[0x1b, 0x24, 0x2b, 0x4a], // CNS 11643-1992 Plane 4
[0x1b, 0x24, 0x2b, 0x4b], // CNS 11643-1992 Plane 5
[0x1b, 0x24, 0x2b, 0x4c], // CNS 11643-1992 Plane 6
[0x1b, 0x24, 0x2b, 0x4d], // CNS 11643-1992 Plane 7
[0x1b, 0x4e], // SS2
[0x1b, 0x4f], // SS3
];
}

25
src/encoding/mbcs.test.ts Normal file
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import * as chardet from '..';
describe('Multibyte Character Sets', () => {
var base = __dirname + '/../test/data/encodings';
it('should return SHIFT-JIS', () => {
expect(chardet.detectFileSync(base + '/shiftjis')).toBe('Shift-JIS');
});
it('should return GB18030', () => {
expect(chardet.detectFileSync(base + '/gb18030')).toBe('GB18030');
});
it('should return Big5', () => {
expect(chardet.detectFileSync(base + '/big5')).toBe('Big5');
});
it('should return EUC-JP', () => {
expect(chardet.detectFileSync(base + '/euc_jp')).toBe('EUC-JP');
});
it('should return EUC-KR', () => {
expect(chardet.detectFileSync(base + '/euc_kr')).toBe('EUC-KR');
});
});

915
src/encoding/mbcs.ts Normal file
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import { Context, Recogniser } from '.';
var match = require('../match').default;
/**
* Binary search implementation (recursive)
*/
function binarySearch(arr: number[], searchValue: number) {
const find = (
arr: number[],
searchValue: number,
left: number,
right: number
): number => {
if (right < left) return -1;
/*
int mid = mid = (left + right) / 2;
There is a bug in the above line;
Joshua Bloch suggests the following replacement:
*/
var mid = Math.floor((left + right) >>> 1);
if (searchValue > arr[mid]) return find(arr, searchValue, mid + 1, right);
if (searchValue < arr[mid]) return find(arr, searchValue, left, mid - 1);
return mid;
};
return find(arr, searchValue, 0, arr.length - 1);
}
// 'Character' iterated character class.
// Recognizers for specific mbcs encodings make their 'characters' available
// by providing a nextChar() function that fills in an instance of iteratedChar
// with the next char from the input.
// The returned characters are not converted to Unicode, but remain as the raw
// bytes (concatenated into an int) from the codepage data.
//
// For Asian charsets, use the raw input rather than the input that has been
// stripped of markup. Detection only considers multi-byte chars, effectively
// stripping markup anyway, and double byte chars do occur in markup too.
//
class IteratedChar {
charValue: number; // 1-4 bytes from the raw input data
index: number;
nextIndex: number;
error: boolean;
done: boolean;
constructor() {
this.charValue = 0; // 1-4 bytes from the raw input data
this.index = 0;
this.nextIndex = 0;
this.error = false;
this.done = false;
}
reset() {
this.charValue = 0;
this.index = -1;
this.nextIndex = 0;
this.error = false;
this.done = false;
}
nextByte(det: Context) {
if (this.nextIndex >= det.fRawLength) {
this.done = true;
return -1;
}
var byteValue = det.fRawInput[this.nextIndex++] & 0x00ff;
return byteValue;
}
}
/**
* Asian double or multi-byte - charsets.
* Match is determined mostly by the input data adhering to the
* encoding scheme for the charset, and, optionally,
* frequency-of-occurrence of characters.
*/
class mbcs implements Recogniser {
commonChars: number[] = [];
name() {
return 'mbcs';
}
/**
* Test the match of this charset with the input text data
* which is obtained via the CharsetDetector object.
*
* @param det The CharsetDetector, which contains the input text
* to be checked for being in this charset.
* @return Two values packed into one int (Damn java, anyhow)
* bits 0-7: the match confidence, ranging from 0-100
* bits 8-15: The match reason, an enum-like value.
*/
match(det: Context) {
var singleByteCharCount = 0, //TODO Do we really need this?
doubleByteCharCount = 0,
commonCharCount = 0,
badCharCount = 0,
totalCharCount = 0,
confidence = 0;
var iter = new IteratedChar();
detectBlock: {
for (iter.reset(); this.nextChar(iter, det); ) {
totalCharCount++;
if (iter.error) {
badCharCount++;
} else {
var cv = iter.charValue & 0xffffffff;
if (cv <= 0xff) {
singleByteCharCount++;
} else {
doubleByteCharCount++;
if (this.commonChars != null) {
// NOTE: This assumes that there are no 4-byte common chars.
if (binarySearch(this.commonChars, cv) >= 0) {
commonCharCount++;
}
}
}
}
if (badCharCount >= 2 && badCharCount * 5 >= doubleByteCharCount) {
// console.log('its here!')
// Bail out early if the byte data is not matching the encoding scheme.
break detectBlock;
}
}
if (doubleByteCharCount <= 10 && badCharCount == 0) {
// Not many multi-byte chars.
if (doubleByteCharCount == 0 && totalCharCount < 10) {
// There weren't any multibyte sequences, and there was a low density of non-ASCII single bytes.
// We don't have enough data to have any confidence.
// Statistical analysis of single byte non-ASCII characters would probably help here.
confidence = 0;
} else {
// ASCII or ISO file? It's probably not our encoding,
// but is not incompatible with our encoding, so don't give it a zero.
confidence = 10;
}
break detectBlock;
}
//
// No match if there are too many characters that don't fit the encoding scheme.
// (should we have zero tolerance for these?)
//
if (doubleByteCharCount < 20 * badCharCount) {
confidence = 0;
break detectBlock;
}
if (this.commonChars == null) {
// We have no statistics on frequently occuring characters.
// Assess confidence purely on having a reasonable number of
// multi-byte characters (the more the better
confidence = 30 + doubleByteCharCount - 20 * badCharCount;
if (confidence > 100) {
confidence = 100;
}
} else {
//
// Frequency of occurrence statistics exist.
//
// @ts-ignore
var maxVal = Math.log(parseFloat(doubleByteCharCount) / 4);
var scaleFactor = 90.0 / maxVal;
confidence = Math.floor(
Math.log(commonCharCount + 1) * scaleFactor + 10
);
confidence = Math.min(confidence, 100);
}
} // end of detectBlock:
return confidence == 0 ? null : match(det, this, confidence);
}
/**
* Get the next character (however many bytes it is) from the input data
* Subclasses for specific charset encodings must implement this function
* to get characters according to the rules of their encoding scheme.
*
* This function is not a method of class iteratedChar only because
* that would require a lot of extra derived classes, which is awkward.
* @param it The iteratedChar 'struct' into which the returned char is placed.
* @param det The charset detector, which is needed to get at the input byte data
* being iterated over.
* @return True if a character was returned, false at end of input.
*/
nextChar(iter: IteratedChar, det: Context): boolean {
return true;
}
}
/**
* Shift-JIS charset recognizer.
*/
export class sjis extends mbcs {
name() {
return 'Shift-JIS';
}
language() {
return 'ja';
}
// TODO: This set of data comes from the character frequency-
// of-occurrence analysis tool. The data needs to be moved
// into a resource and loaded from there.
commonChars = [
0x8140,
0x8141,
0x8142,
0x8145,
0x815b,
0x8169,
0x816a,
0x8175,
0x8176,
0x82a0,
0x82a2,
0x82a4,
0x82a9,
0x82aa,
0x82ab,
0x82ad,
0x82af,
0x82b1,
0x82b3,
0x82b5,
0x82b7,
0x82bd,
0x82be,
0x82c1,
0x82c4,
0x82c5,
0x82c6,
0x82c8,
0x82c9,
0x82cc,
0x82cd,
0x82dc,
0x82e0,
0x82e7,
0x82e8,
0x82e9,
0x82ea,
0x82f0,
0x82f1,
0x8341,
0x8343,
0x834e,
0x834f,
0x8358,
0x835e,
0x8362,
0x8367,
0x8375,
0x8376,
0x8389,
0x838a,
0x838b,
0x838d,
0x8393,
0x8e96,
0x93fa,
0x95aa,
];
nextChar(iter: IteratedChar, det: Context) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte;
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0) return false;
if (firstByte <= 0x7f || (firstByte > 0xa0 && firstByte <= 0xdf))
return true;
var secondByte = iter.nextByte(det);
if (secondByte < 0) return false;
iter.charValue = (firstByte << 8) | secondByte;
if (
!(
(secondByte >= 0x40 && secondByte <= 0x7f) ||
(secondByte >= 0x80 && secondByte <= 0xff)
)
) {
// Illegal second byte value.
iter.error = true;
}
return true;
}
}
/**
* Big5 charset recognizer.
*/
export class big5 extends mbcs {
name() {
return 'Big5';
}
language() {
return 'zh';
}
// TODO: This set of data comes from the character frequency-
// of-occurrence analysis tool. The data needs to be moved
// into a resource and loaded from there.
commonChars = [
0xa140,
0xa141,
0xa142,
0xa143,
0xa147,
0xa149,
0xa175,
0xa176,
0xa440,
0xa446,
0xa447,
0xa448,
0xa451,
0xa454,
0xa457,
0xa464,
0xa46a,
0xa46c,
0xa477,
0xa4a3,
0xa4a4,
0xa4a7,
0xa4c1,
0xa4ce,
0xa4d1,
0xa4df,
0xa4e8,
0xa4fd,
0xa540,
0xa548,
0xa558,
0xa569,
0xa5cd,
0xa5e7,
0xa657,
0xa661,
0xa662,
0xa668,
0xa670,
0xa6a8,
0xa6b3,
0xa6b9,
0xa6d3,
0xa6db,
0xa6e6,
0xa6f2,
0xa740,
0xa751,
0xa759,
0xa7da,
0xa8a3,
0xa8a5,
0xa8ad,
0xa8d1,
0xa8d3,
0xa8e4,
0xa8fc,
0xa9c0,
0xa9d2,
0xa9f3,
0xaa6b,
0xaaba,
0xaabe,
0xaacc,
0xaafc,
0xac47,
0xac4f,
0xacb0,
0xacd2,
0xad59,
0xaec9,
0xafe0,
0xb0ea,
0xb16f,
0xb2b3,
0xb2c4,
0xb36f,
0xb44c,
0xb44e,
0xb54c,
0xb5a5,
0xb5bd,
0xb5d0,
0xb5d8,
0xb671,
0xb7ed,
0xb867,
0xb944,
0xbad8,
0xbb44,
0xbba1,
0xbdd1,
0xc2c4,
0xc3b9,
0xc440,
0xc45f,
];
nextChar(iter: IteratedChar, det: Context) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = (iter.charValue = iter.nextByte(det));
if (firstByte < 0) return false;
// single byte character.
if (firstByte <= 0x7f || firstByte == 0xff) return true;
var secondByte = iter.nextByte(det);
if (secondByte < 0) return false;
iter.charValue = (iter.charValue << 8) | secondByte;
if (secondByte < 0x40 || secondByte == 0x7f || secondByte == 0xff)
iter.error = true;
return true;
}
}
/**
* EUC charset recognizers. One abstract class that provides the common function
* for getting the next character according to the EUC encoding scheme,
* and nested derived classes for EUC_KR, EUC_JP, EUC_CN.
*
* Get the next character value for EUC based encodings.
* Character 'value' is simply the raw bytes that make up the character
* packed into an int.
*/
function eucNextChar(iter: IteratedChar, det: Context) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = 0;
var secondByte = 0;
var thirdByte = 0;
//int fourthByte = 0;
buildChar: {
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0) {
// Ran off the end of the input data
iter.done = true;
break buildChar;
}
if (firstByte <= 0x8d) {
// single byte char
break buildChar;
}
secondByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | secondByte;
if (firstByte >= 0xa1 && firstByte <= 0xfe) {
// Two byte Char
if (secondByte < 0xa1) {
iter.error = true;
}
break buildChar;
}
if (firstByte == 0x8e) {
// Code Set 2.
// In EUC-JP, total char size is 2 bytes, only one byte of actual char value.
// In EUC-TW, total char size is 4 bytes, three bytes contribute to char value.
// We don't know which we've got.
// Treat it like EUC-JP. If the data really was EUC-TW, the following two
// bytes will look like a well formed 2 byte char.
if (secondByte < 0xa1) {
iter.error = true;
}
break buildChar;
}
if (firstByte == 0x8f) {
// Code set 3.
// Three byte total char size, two bytes of actual char value.
thirdByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | thirdByte;
if (thirdByte < 0xa1) {
iter.error = true;
}
}
}
return iter.done == false;
}
/**
* The charset recognize for EUC-JP. A singleton instance of this class
* is created and kept by the public CharsetDetector class
*/
export class euc_jp extends mbcs {
name() {
return 'EUC-JP';
}
language() {
return 'ja';
}
// TODO: This set of data comes from the character frequency-
// of-occurrence analysis tool. The data needs to be moved
// into a resource and loaded from there.
commonChars = [
0xa1a1,
0xa1a2,
0xa1a3,
0xa1a6,
0xa1bc,
0xa1ca,
0xa1cb,
0xa1d6,
0xa1d7,
0xa4a2,
0xa4a4,
0xa4a6,
0xa4a8,
0xa4aa,
0xa4ab,
0xa4ac,
0xa4ad,
0xa4af,
0xa4b1,
0xa4b3,
0xa4b5,
0xa4b7,
0xa4b9,
0xa4bb,
0xa4bd,
0xa4bf,
0xa4c0,
0xa4c1,
0xa4c3,
0xa4c4,
0xa4c6,
0xa4c7,
0xa4c8,
0xa4c9,
0xa4ca,
0xa4cb,
0xa4ce,
0xa4cf,
0xa4d0,
0xa4de,
0xa4df,
0xa4e1,
0xa4e2,
0xa4e4,
0xa4e8,
0xa4e9,
0xa4ea,
0xa4eb,
0xa4ec,
0xa4ef,
0xa4f2,
0xa4f3,
0xa5a2,
0xa5a3,
0xa5a4,
0xa5a6,
0xa5a7,
0xa5aa,
0xa5ad,
0xa5af,
0xa5b0,
0xa5b3,
0xa5b5,
0xa5b7,
0xa5b8,
0xa5b9,
0xa5bf,
0xa5c3,
0xa5c6,
0xa5c7,
0xa5c8,
0xa5c9,
0xa5cb,
0xa5d0,
0xa5d5,
0xa5d6,
0xa5d7,
0xa5de,
0xa5e0,
0xa5e1,
0xa5e5,
0xa5e9,
0xa5ea,
0xa5eb,
0xa5ec,
0xa5ed,
0xa5f3,
0xb8a9,
0xb9d4,
0xbaee,
0xbbc8,
0xbef0,
0xbfb7,
0xc4ea,
0xc6fc,
0xc7bd,
0xcab8,
0xcaf3,
0xcbdc,
0xcdd1,
];
nextChar = eucNextChar;
}
/**
* The charset recognize for EUC-KR. A singleton instance of this class
* is created and kept by the public CharsetDetector class
*/
export class euc_kr extends mbcs {
name() {
return 'EUC-KR';
}
language() {
return 'ko';
}
// TODO: This set of data comes from the character frequency-
// of-occurrence analysis tool. The data needs to be moved
// into a resource and loaded from there.
commonChars = [
0xb0a1,
0xb0b3,
0xb0c5,
0xb0cd,
0xb0d4,
0xb0e6,
0xb0ed,
0xb0f8,
0xb0fa,
0xb0fc,
0xb1b8,
0xb1b9,
0xb1c7,
0xb1d7,
0xb1e2,
0xb3aa,
0xb3bb,
0xb4c2,
0xb4cf,
0xb4d9,
0xb4eb,
0xb5a5,
0xb5b5,
0xb5bf,
0xb5c7,
0xb5e9,
0xb6f3,
0xb7af,
0xb7c2,
0xb7ce,
0xb8a6,
0xb8ae,
0xb8b6,
0xb8b8,
0xb8bb,
0xb8e9,
0xb9ab,
0xb9ae,
0xb9cc,
0xb9ce,
0xb9fd,
0xbab8,
0xbace,
0xbad0,
0xbaf1,
0xbbe7,
0xbbf3,
0xbbfd,
0xbcad,
0xbcba,
0xbcd2,
0xbcf6,
0xbdba,
0xbdc0,
0xbdc3,
0xbdc5,
0xbec6,
0xbec8,
0xbedf,
0xbeee,
0xbef8,
0xbefa,
0xbfa1,
0xbfa9,
0xbfc0,
0xbfe4,
0xbfeb,
0xbfec,
0xbff8,
0xc0a7,
0xc0af,
0xc0b8,
0xc0ba,
0xc0bb,
0xc0bd,
0xc0c7,
0xc0cc,
0xc0ce,
0xc0cf,
0xc0d6,
0xc0da,
0xc0e5,
0xc0fb,
0xc0fc,
0xc1a4,
0xc1a6,
0xc1b6,
0xc1d6,
0xc1df,
0xc1f6,
0xc1f8,
0xc4a1,
0xc5cd,
0xc6ae,
0xc7cf,
0xc7d1,
0xc7d2,
0xc7d8,
0xc7e5,
0xc8ad,
];
nextChar = eucNextChar;
}
/**
* GB-18030 recognizer. Uses simplified Chinese statistics.
*/
export class gb_18030 extends mbcs {
name() {
return 'GB18030';
}
language() {
return 'zh';
}
/*
* Get the next character value for EUC based encodings.
* Character 'value' is simply the raw bytes that make up the character
* packed into an int.
*/
nextChar(iter: IteratedChar, det: Context) {
iter.index = iter.nextIndex;
iter.error = false;
var firstByte = 0;
var secondByte = 0;
var thirdByte = 0;
var fourthByte = 0;
buildChar: {
firstByte = iter.charValue = iter.nextByte(det);
if (firstByte < 0) {
// Ran off the end of the input data
iter.done = true;
break buildChar;
}
if (firstByte <= 0x80) {
// single byte char
break buildChar;
}
secondByte = iter.nextByte(det);
iter.charValue = (iter.charValue << 8) | secondByte;
if (firstByte >= 0x81 && firstByte <= 0xfe) {
// Two byte Char
if (
(secondByte >= 0x40 && secondByte <= 0x7e) ||
(secondByte >= 80 && secondByte <= 0xfe)
) {
break buildChar;
}
// Four byte char
if (secondByte >= 0x30 && secondByte <= 0x39) {
thirdByte = iter.nextByte(det);
if (thirdByte >= 0x81 && thirdByte <= 0xfe) {
fourthByte = iter.nextByte(det);
if (fourthByte >= 0x30 && fourthByte <= 0x39) {
iter.charValue =
(iter.charValue << 16) | (thirdByte << 8) | fourthByte;
break buildChar;
}
}
}
iter.error = true;
break buildChar;
}
}
return iter.done == false;
}
// TODO: This set of data comes from the character frequency-
// of-occurrence analysis tool. The data needs to be moved
// into a resource and loaded from there.
commonChars = [
0xa1a1,
0xa1a2,
0xa1a3,
0xa1a4,
0xa1b0,
0xa1b1,
0xa1f1,
0xa1f3,
0xa3a1,
0xa3ac,
0xa3ba,
0xb1a8,
0xb1b8,
0xb1be,
0xb2bb,
0xb3c9,
0xb3f6,
0xb4f3,
0xb5bd,
0xb5c4,
0xb5e3,
0xb6af,
0xb6d4,
0xb6e0,
0xb7a2,
0xb7a8,
0xb7bd,
0xb7d6,
0xb7dd,
0xb8b4,
0xb8df,
0xb8f6,
0xb9ab,
0xb9c9,
0xb9d8,
0xb9fa,
0xb9fd,
0xbacd,
0xbba7,
0xbbd6,
0xbbe1,
0xbbfa,
0xbcbc,
0xbcdb,
0xbcfe,
0xbdcc,
0xbecd,
0xbedd,
0xbfb4,
0xbfc6,
0xbfc9,
0xc0b4,
0xc0ed,
0xc1cb,
0xc2db,
0xc3c7,
0xc4dc,
0xc4ea,
0xc5cc,
0xc6f7,
0xc7f8,
0xc8ab,
0xc8cb,
0xc8d5,
0xc8e7,
0xc9cf,
0xc9fa,
0xcab1,
0xcab5,
0xcac7,
0xcad0,
0xcad6,
0xcaf5,
0xcafd,
0xccec,
0xcdf8,
0xceaa,
0xcec4,
0xced2,
0xcee5,
0xcfb5,
0xcfc2,
0xcfd6,
0xd0c2,
0xd0c5,
0xd0d0,
0xd0d4,
0xd1a7,
0xd2aa,
0xd2b2,
0xd2b5,
0xd2bb,
0xd2d4,
0xd3c3,
0xd3d0,
0xd3fd,
0xd4c2,
0xd4da,
0xd5e2,
0xd6d0,
];
}

76
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import * as chardet from '..';
describe('Singlebyte Character Sets', () => {
var base = __dirname + '/../test/data/encodings';
it('should return ISO-8859-1 (English)', () => {
expect(chardet.detectFileSync(base + '/iso88591_en')).toBe('ISO-8859-1');
});
it('should return ISO-8859-2 (Czech)', () => {
expect(chardet.detectFileSync(base + '/iso88592_cs')).toBe('ISO-8859-2');
});
test.todo('should return ISO-8859-3');
test.todo('should return ISO-8859-4');
it('should return ISO-8859-5 (Russian)', () => {
expect(chardet.detectFileSync(base + '/iso88595_ru')).toBe('ISO-8859-5');
});
it('should return ISO-8859-6 (Arabic)', () => {
expect(chardet.detectFileSync(base + '/iso88596_ar')).toBe('ISO-8859-6');
});
it('should return ISO-8859-7 (Greek)', () => {
expect(chardet.detectFileSync(base + '/iso88597_el')).toBe('ISO-8859-7');
});
it('should return ISO-8859-8 (Hebrew)', () => {
expect(chardet.detectFileSync(base + '/iso88598_he')).toBe('ISO-8859-8');
});
it('should return ISO-8859-9 (Turkish)', () => {
expect(chardet.detectFileSync(base + '/iso88599_tr')).toBe('ISO-8859-9');
});
test.todo('should return ISO-8859-10');
test.todo('should return ISO-8859-11');
// iso-8859-12 is abandoned
test.todo('should return ISO-8859-13');
test.todo('should return ISO-8859-14');
test.todo('should return ISO-8859-15');
test.todo('should return ISO-8859-16');
it('should return windows-1250 (Czech)', () => {
expect(chardet.detectFileSync(base + '/windows_1250')).toBe('windows-1250');
});
it('should return windows-1251 (Russian)', () => {
expect(chardet.detectFileSync(base + '/windows_1251')).toBe('windows-1251');
});
it('should return windows-1252 (English)', () => {
expect(chardet.detectFileSync(base + '/windows_1252')).toBe('windows-1252');
});
it('should return windows-1253 (Greek)', () => {
expect(chardet.detectFileSync(base + '/windows_1253')).toBe('windows-1253');
});
it('should return windows-1254 (Turkish)', () => {
expect(chardet.detectFileSync(base + '/windows_1254')).toBe('windows-1254');
});
it('should return windows-1255 (Hebrew)', () => {
expect(chardet.detectFileSync(base + '/windows_1255')).toBe('windows-1255');
});
it('should return windows-1256 (Arabic)', () => {
expect(chardet.detectFileSync(base + '/windows_1256')).toBe('windows-1256');
});
it('should return KOI8-R (Russian)', () => {
expect(chardet.detectFileSync(base + '/koi8r')).toBe('KOI8-R');
});
});

4438
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21
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import * as chardet from '..';
describe('Unicode', () => {
var base = __dirname + '/../test/data/encodings';
it('should return UTF-16LE', () => {
expect(chardet.detectFileSync(base + '/utf16le')).toBe('UTF-16LE');
});
it('should return UTF-16BE', () => {
expect(chardet.detectFileSync(base + '/utf16be')).toBe('UTF-16BE');
});
it('should return UTF-32LE', () => {
expect(chardet.detectFileSync(base + '/utf32le')).toBe('UTF-32LE');
});
it('should return UTF-32BE', () => {
expect(chardet.detectFileSync(base + '/utf32be')).toBe('UTF-32BE');
});
});

140
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import { Context, Recogniser } from '.';
const match = require('../match').default;
/**
* This class matches UTF-16 and UTF-32, both big- and little-endian. The
* BOM will be used if it is present.
*/
export class UTF_16BE implements Recogniser {
name() {
return 'UTF-16BE';
}
match(det: Context) {
var input = det.fRawInput;
if (
input.length >= 2 &&
(input[0] & 0xff) == 0xfe &&
(input[1] & 0xff) == 0xff
) {
return match(det, this, 100); // confidence = 100
}
// TODO: Do some statistics to check for unsigned UTF-16BE
return null;
}
}
export class UTF_16LE implements Recogniser {
name() {
return 'UTF-16LE';
}
match(det: Context) {
var input = det.fRawInput;
if (
input.length >= 2 &&
(input[0] & 0xff) == 0xff &&
(input[1] & 0xff) == 0xfe
) {
// LE BOM is present.
if (input.length >= 4 && input[2] == 0x00 && input[3] == 0x00) {
// It is probably UTF-32 LE, not UTF-16
return null;
}
return match(det, this, 100); // confidence = 100
}
// TODO: Do some statistics to check for unsigned UTF-16LE
return null;
}
}
interface WithGetChar {
getChar(input: Buffer, index: number): number;
}
class UTF_32 implements Recogniser, WithGetChar {
name() {
return 'UTF-32';
}
getChar(input: Buffer, index: number): number {
return -1;
}
match(det: Context) {
var input = det.fRawInput,
limit = (det.fRawLength / 4) * 4,
numValid = 0,
numInvalid = 0,
hasBOM = false,
confidence = 0;
if (limit == 0) {
return null;
}
if (this.getChar(input, 0) == 0x0000feff) {
hasBOM = true;
}
for (var i = 0; i < limit; i += 4) {
var ch = this.getChar(input, i);
if (ch < 0 || ch >= 0x10ffff || (ch >= 0xd800 && ch <= 0xdfff)) {
numInvalid += 1;
} else {
numValid += 1;
}
}
// Cook up some sort of confidence score, based on presence of a BOM
// and the existence of valid and/or invalid multi-byte sequences.
if (hasBOM && numInvalid == 0) {
confidence = 100;
} else if (hasBOM && numValid > numInvalid * 10) {
confidence = 80;
} else if (numValid > 3 && numInvalid == 0) {
confidence = 100;
} else if (numValid > 0 && numInvalid == 0) {
confidence = 80;
} else if (numValid > numInvalid * 10) {
// Probably corrupt UTF-32BE data. Valid sequences aren't likely by chance.
confidence = 25;
}
// return confidence == 0 ? null : new CharsetMatch(det, this, confidence);
return confidence == 0 ? null : match(det, this, confidence);
}
}
export class UTF_32BE extends UTF_32 {
name() {
return 'UTF-32BE';
}
getChar(input: Buffer, index: number) {
return (
((input[index + 0] & 0xff) << 24) |
((input[index + 1] & 0xff) << 16) |
((input[index + 2] & 0xff) << 8) |
(input[index + 3] & 0xff)
);
}
}
export class UTF_32LE extends UTF_32 {
name() {
return 'UTF-32LE';
}
getChar(input: Buffer, index: number) {
return (
((input[index + 3] & 0xff) << 24) |
((input[index + 2] & 0xff) << 16) |
((input[index + 1] & 0xff) << 8) |
(input[index + 0] & 0xff)
);
}
}

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src/encoding/utf8.test.ts Normal file
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import * as chardet from '..';
describe('UTF-8', () => {
it('should return UTF-8', () => {
expect(
chardet.detectFileSync(__dirname + '/../test/data/encodings/utf8')
).toBe('UTF-8');
});
});

54
encoding/utf8.js → src/encoding/utf8.ts
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@ -1,15 +1,13 @@
import { Context, Recogniser } from '.';
var Match = require ('../match'); var match = require('../match').default;
/** export default class Utf8 implements Recogniser {
* Charset recognizer for UTF-8 name() {
*/
module.exports = function() {
this.name = function() {
return 'UTF-8'; return 'UTF-8';
}; }
this.match = function(det) {
match(det: Context) {
var hasBOM = false, var hasBOM = false,
numValid = 0, numValid = 0,
numInvalid = 0, numInvalid = 0,
@ -17,16 +15,19 @@ module.exports = function() {
trailBytes = 0, trailBytes = 0,
confidence; confidence;
if (det.fRawLength >= 3 && if (
(input[0] & 0xff) == 0xef && (input[1] & 0xff) == 0xbb && (input[2] & 0xff) == 0xbf) { det.fRawLength >= 3 &&
(input[0] & 0xff) == 0xef &&
(input[1] & 0xff) == 0xbb &&
(input[2] & 0xff) == 0xbf
) {
hasBOM = true; hasBOM = true;
} }
// Scan for multi-byte sequences // Scan for multi-byte sequences
for (var i = 0; i < det.fRawLength; i++) { for (var i = 0; i < det.fRawLength; i++) {
var b = input[i]; var b = input[i];
if ((b & 0x80) == 0) if ((b & 0x80) == 0) continue; // ASCII
continue; // ASCII
// Hi bit on char found. Figure out how long the sequence should be // Hi bit on char found. Figure out how long the sequence should be
if ((b & 0x0e0) == 0x0c0) { if ((b & 0x0e0) == 0x0c0) {
@ -37,16 +38,14 @@ module.exports = function() {
trailBytes = 3; trailBytes = 3;
} else { } else {
numInvalid++; numInvalid++;
if (numInvalid > 5) if (numInvalid > 5) break;
break;
trailBytes = 0; trailBytes = 0;
} }
// Verify that we've got the right number of trail bytes in the sequence // Verify that we've got the right number of trail bytes in the sequence
for (;;) { for (;;) {
i++; i++;
if (i >= det.fRawLength) if (i >= det.fRawLength) break;
break;
if ((input[i] & 0xc0) != 0x080) { if ((input[i] & 0xc0) != 0x080) {
numInvalid++; numInvalid++;
@ -62,23 +61,18 @@ module.exports = function() {
// Cook up some sort of confidence score, based on presense of a BOM // Cook up some sort of confidence score, based on presense of a BOM
// and the existence of valid and/or invalid multi-byte sequences. // and the existence of valid and/or invalid multi-byte sequences.
confidence = 0; confidence = 0;
if (hasBOM && numInvalid == 0) if (hasBOM && numInvalid == 0) confidence = 100;
confidence = 100; else if (hasBOM && numValid > numInvalid * 10) confidence = 80;
else if (hasBOM && numValid > numInvalid * 10) else if (numValid > 3 && numInvalid == 0) confidence = 100;
confidence = 80; else if (numValid > 0 && numInvalid == 0) confidence = 80;
else if (numValid > 3 && numInvalid == 0)
confidence = 100;
else if (numValid > 0 && numInvalid == 0)
confidence = 80;
else if (numValid == 0 && numInvalid == 0) else if (numValid == 0 && numInvalid == 0)
// Plain ASCII. // Plain ASCII.
confidence = 10; confidence = 10;
else if (numValid > numInvalid * 10) else if (numValid > numInvalid * 10)
// Probably corruput utf-8 data. Valid sequences aren't likely by chance. // Probably corrupt utf-8 data. Valid sequences aren't likely by chance.
confidence = 25; confidence = 25;
else else return null;
return null
return new Match(det, this, confidence); return match(det, this, confidence);
}; }
}; }

52
src/index.test.ts Normal file
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@ -0,0 +1,52 @@
import * as chardet from '.';
import fs from 'fs';
describe('chardet', () => {
var path = __dirname + '/test/data/encodings/utf8';
var expectedEncodingsFromPath = [
{ 'confidence': 100, 'name': 'UTF-8', 'lang': undefined },
{ 'confidence': 32, 'name': 'windows-1252', 'lang': 'fr' },
{ 'confidence': 19, 'name': 'KOI8-R', 'lang': undefined },
{ 'confidence': 10, 'name': 'Big5', 'lang': undefined },
{ 'confidence': 10, 'name': 'GB18030', 'lang': undefined },
{ 'confidence': 10, 'name': 'windows-1253', 'lang': undefined },
{ 'confidence': 6, 'name': 'windows-1250', 'lang': 'pl' },
{ 'confidence': 4, 'name': 'windows-1254', 'lang': undefined },
{ 'confidence': 2, 'name': 'windows-1251', 'lang': undefined }
];
describe('#detect', () => {
it('should detect encoding', () => {
expect(chardet.detect(fs.readFileSync(path))).toBe('UTF-8');
});
});
describe('#detectFile', () => {
it('should detect encoding', async () => {
const res = await chardet.detectFile(path);
expect(res).toBe('UTF-8');
});
it('should detect encoding with smaller sample size', async () => {
const res = await chardet.detectFile(path, { sampleSize: 32 });
expect(res).toBe('UTF-8');
});
});
describe('#detectFileSync', () => {
it('should detect encoding', () => {
expect(chardet.detectFileSync(path)).toBe('UTF-8');
});
it('should detect encoding with smaller sample size', () => {
expect(chardet.detectFileSync(path, { sampleSize: 32 })).toBe('UTF-8');
});
});
describe('#analyse', () => {
it('should return a list of encodings, sorted by confidence level in decending order', () => {
const matches = chardet.analyse(fs.readFileSync(path));
expect(matches).toEqual(expectedEncodingsFromPath);
});
});
});

139
src/index.ts Normal file
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@ -0,0 +1,139 @@
import { Match } from "./match";
import { Recogniser, Context } from './encoding';
import Utf8 from "./encoding/utf8";
import * as unicode from "./encoding/unicode";
import * as mbcs from "./encoding/mbcs";
import * as sbcs from "./encoding/sbcs";
import * as iso2022 from "./encoding/iso2022";
let fs: any;
const loadFs = () => {
if (typeof module === 'object' && typeof module.exports === 'object') {
fs = fs ? fs : require('fs');
return fs;
}
throw new Error('File system is not available');
}
interface FullOptions {
sampleSize: number
}
type Options = Partial<FullOptions>
var recognisers: Recogniser[] = [
new Utf8(),
new unicode.UTF_16BE(),
new unicode.UTF_16LE(),
new unicode.UTF_32BE(),
new unicode.UTF_32LE(),
new mbcs.sjis(),
new mbcs.big5(),
new mbcs.euc_jp(),
new mbcs.euc_kr(),
new mbcs.gb_18030(),
new iso2022.ISO_2022_JP(),
new iso2022.ISO_2022_KR(),
new iso2022.ISO_2022_CN(),
new sbcs.ISO_8859_1(),
new sbcs.ISO_8859_2(),
new sbcs.ISO_8859_5(),
new sbcs.ISO_8859_6(),
new sbcs.ISO_8859_7(),
new sbcs.ISO_8859_8(),
new sbcs.ISO_8859_9(),
new sbcs.windows_1251(),
new sbcs.windows_1256(),
new sbcs.KOI8_R()
];
type DetectResult = Match[] | string | null;
export const detect = (buffer: Buffer): string | null => {
const matches: Match[] = analyse(buffer);
return matches.length > 0 ? matches[0].name : null;
};
export const analyse = (buffer: Buffer): Match[] => {
// Tally up the byte occurrence statistics.
var fByteStats = [];
for (var i = 0; i < 256; i++) fByteStats[i] = 0;
for (var i = buffer.length - 1; i >= 0; i--) fByteStats[buffer[i] & 0x00ff]++;
var fC1Bytes = false;
for (var i = 0x80; i <= 0x9f; i += 1) {
if (fByteStats[i] != 0) {
fC1Bytes = true;
break;
}
}
var context: Context = {
fByteStats: fByteStats,
fC1Bytes: fC1Bytes,
fRawInput: buffer,
fRawLength: buffer.length,
fInputBytes: buffer,
fInputLen: buffer.length
};
var matches = recognisers
.map((rec) => {
return rec.match(context);
})
.filter((match) => {
return !!match;
})
.sort((a, b) => {
return b!.confidence - a!.confidence;
});
return matches as Match[];
}
export const detectFile = (filepath: string, opts: Options = {}): Promise<DetectResult> =>
new Promise((resolve, reject) => {
var fd: any;
const fs = loadFs();
var handler = (err: Error | null | undefined, buffer: Buffer) => {
if (fd) {
fs.closeSync(fd);
}
if (err) {
reject(err);
} else {
resolve(detect(buffer));
}
};
if (opts && opts.sampleSize) {
fd = fs.openSync(filepath, "r");
const sample: Buffer = Buffer.allocUnsafe(opts.sampleSize);
fs.read(fd, sample, 0, opts.sampleSize, null, (err?: Error) => {
handler(err, sample);
});
return;
}
fs.readFile(filepath, handler);
});
export const detectFileSync = (filepath: string, opts: Options = {}): DetectResult => {
const fs = loadFs();
if (opts && opts.sampleSize) {
var fd = fs.openSync(filepath, "r"),
sample = Buffer.allocUnsafe(opts.sampleSize);
fs.readSync(fd, sample, 0, opts.sampleSize);
fs.closeSync(fd);
return detect(sample);
}
return detect(fs.readFileSync(filepath));
};

13
src/match.ts Normal file
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@ -0,0 +1,13 @@
export interface Match {
confidence: number;
name: string;
lang: string;
}
// @ts-ignore
export default (det, rec, confidence, name, lang): Match => ({
confidence: confidence,
name: name || rec.name(det),
lang: lang
});

0
test/data/collation.zip → src/test/data/collation.zip
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0
test/data/encodings/big5 → src/test/data/encodings/big5
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0
test/data/encodings/euc_jp → src/test/data/encodings/euc_jp
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0
test/data/encodings/euc_kr → src/test/data/encodings/euc_kr
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0
test/data/encodings/gb18030 → src/test/data/encodings/gb18030
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0
test/data/encodings/iso2022cn → src/test/data/encodings/iso2022cn
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0
test/data/encodings/iso2022jp → src/test/data/encodings/iso2022jp
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0
test/data/encodings/iso2022kr → src/test/data/encodings/iso2022kr
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0
test/data/encodings/iso88591_en → src/test/data/encodings/iso88591_en
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0
test/data/encodings/iso88592_cs → src/test/data/encodings/iso88592_cs
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0
test/data/encodings/iso88595_ru → src/test/data/encodings/iso88595_ru
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0
test/data/encodings/iso88596_ar → src/test/data/encodings/iso88596_ar
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0
test/data/encodings/iso88597_el → src/test/data/encodings/iso88597_el
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0
test/data/encodings/iso88598 → src/test/data/encodings/iso88598
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0
test/data/encodings/iso88598_he → src/test/data/encodings/iso88598_he
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0
test/data/encodings/iso88599_tr → src/test/data/encodings/iso88599_tr
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0
test/data/encodings/koi8r → src/test/data/encodings/koi8r
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0
test/data/encodings/lang_arabic → src/test/data/encodings/lang_arabic
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0
test/data/encodings/lang_chinese → src/test/data/encodings/lang_chinese
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0
test/data/encodings/lang_czech → src/test/data/encodings/lang_czech
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0
test/data/encodings/lang_greek → src/test/data/encodings/lang_greek
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0
test/data/encodings/lang_hebrew → src/test/data/encodings/lang_hebrew
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0
test/data/encodings/lang_japanese → src/test/data/encodings/lang_japanese
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0
test/data/encodings/lang_korean → src/test/data/encodings/lang_korean
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0
test/data/encodings/lang_russian → src/test/data/encodings/lang_russian
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0
test/data/encodings/lang_turkish → src/test/data/encodings/lang_turkish
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0
test/data/encodings/shiftjis → src/test/data/encodings/shiftjis
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0
test/data/encodings/utf16be → src/test/data/encodings/utf16be
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0
test/data/encodings/utf16le → src/test/data/encodings/utf16le
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0
test/data/encodings/utf32be → src/test/data/encodings/utf32be
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0
test/data/encodings/utf32le → src/test/data/encodings/utf32le
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0
test/data/encodings/utf8 → src/test/data/encodings/utf8
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0
test/data/encodings/windows_1250 → src/test/data/encodings/windows_1250
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0
test/data/encodings/windows_1251 → src/test/data/encodings/windows_1251
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0
test/data/encodings/windows_1252 → src/test/data/encodings/windows_1252
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0
test/data/encodings/windows_1253 → src/test/data/encodings/windows_1253
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0
test/data/encodings/windows_1254 → src/test/data/encodings/windows_1254
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0
test/data/encodings/windows_1255 → src/test/data/encodings/windows_1255
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0
test/data/encodings/windows_1256 → src/test/data/encodings/windows_1256
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104
test/chardet.js
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@ -1,104 +0,0 @@
var assert = require('assert'),
chardet = require('../'),
fs = require('fs');
describe('chardet', function() {
var path = __dirname + '/data/encodings/utf8';
var expectedEncodingsFromPath = [
{ 'confidence': 100, 'name': 'UTF-8', 'lang': undefined },
{ 'confidence': 32, 'name': 'windows-1252', 'lang': 'fr' },
{ 'confidence': 19, 'name': 'KOI8-R', 'lang': undefined },
{ 'confidence': 10, 'name': 'Big5', 'lang': undefined },
{ 'confidence': 10, 'name': 'GB18030', 'lang': undefined },
{ 'confidence': 10, 'name': 'windows-1253', 'lang': undefined },
{ 'confidence': 6, 'name': 'windows-1250', 'lang': 'pl' },
{ 'confidence': 4, 'name': 'windows-1254', 'lang': undefined },
{ 'confidence': 2, 'name': 'windows-1251', 'lang': undefined }
];
describe('#detect', function() {
it('should detect encoding', function() {
assert.equal(chardet.detect(fs.readFileSync(path)), 'UTF-8');
});
});
describe('#detectFile', function() {
it('should detect encoding', function(done) {
chardet.detectFile(path, function(err, res) {
assert.equal(err, null);
assert.equal(res, 'UTF-8');
done();
});
});
it('should detect encoding with smaller sample size', function(done) {
chardet.detectFile(path, { sampleSize: 32 }, function(err, res) {
assert.equal(err, null);
assert.equal(res, 'UTF-8');
done();
});
});
});
describe('#detectFileSync', function() {
it('should detect encoding', function() {
assert.equal(chardet.detectFileSync(path), 'UTF-8');
});
it('should detect encoding with smaller sample size', function() {
assert.equal(chardet.detectFileSync(path, { sampleSize: 32 }), 'UTF-8');
});
});
describe('#detectAll', function() {
it('should return a list of encodings, sorted by confidence level in decending order', function() {
var matches = chardet.detectAll(fs.readFileSync(path));
assert.deepEqual(matches, expectedEncodingsFromPath);
});
});
describe('#detectFileAll', function() {
it('should return a list of encodings, sorted by confidence level in decending order', function(done) {
chardet.detectFileAll(path, function(err, res) {
assert.equal(err, null);
assert.deepEqual(res, expectedEncodingsFromPath);
done();
});
});
it('should return a list of encodings even with smaller sample size, sorted by confidence level in decending order', function(done) {
chardet.detectFileAll(path, { sampleSize: 32 }, function(err, res) {
assert.equal(err, null);
assert.deepEqual(res, [
{ confidence: 100, name: 'UTF-8', lang: undefined },
{ confidence: 10, name: 'Shift-JIS', lang: undefined },
{ confidence: 10, name: 'windows-1252', lang: 'it' },
{ confidence: 10, name: 'windows-1250', lang: 'hu' },
{ confidence: 10, name: 'windows-1253', lang: undefined },
{ confidence: 10, name: 'windows-1251', lang: undefined }
]);
done();
});
});
});
describe('#detectFileAllSync', function() {
it('should return a list of encodings, sorted by confidence level in decending order', function() {
var matches = chardet.detectFileAllSync(path);
assert.deepEqual(matches, expectedEncodingsFromPath);
});
it('should return a list of encodings even with smaller sample size, sorted by confidence level in decending order', function() {
var matches = chardet.detectFileAllSync(path, { sampleSize: 32 });
assert.deepEqual(matches, [
{'confidence': 100, 'name': 'UTF-8', 'lang': undefined},
{'confidence': 10, 'name': 'Shift-JIS', 'lang': undefined},
{'confidence': 10, 'name': 'windows-1252', 'lang': 'it'},
{'confidence': 10, 'name': 'windows-1250', 'lang': 'hu'},
{'confidence': 10, 'name': 'windows-1253', 'lang': undefined},
{'confidence': 10, 'name': 'windows-1251', 'lang': undefined}
]);
});
});
});

28
test/encodings/iso2022.js
View File

@ -1,28 +0,0 @@
var assert = require('assert'),
chardet = require('../../');
describe('ISO-2022', function() {
var base = __dirname + '/../data/encodings';
it('should return ISO-2022-JP', function() {
assert.equal(
chardet.detectFileSync(base + '/iso2022jp'),
'ISO-2022-JP'
);
});
it('should return ISO-2022-KR', function() {
assert.equal(
chardet.detectFileSync(base + '/iso2022kr'),
'ISO-2022-KR'
);
});
it('should return ISO-2022-CN', function() {
assert.equal(
chardet.detectFileSync(base + '/iso2022cn'),
'ISO-2022-CN'
);
});
});

43
test/encodings/mbcs.js
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@ -1,43 +0,0 @@
var assert = require('assert'),
chardet = require('../../');
describe('Multybyte Character Sets', function() {
var base = __dirname + '/../data/encodings';
it('should return SHIFT-JIS', function() {
assert.equal(
chardet.detectFileSync(base + '/shiftjis'),
'Shift-JIS'
);
});
it('should return GB18030', function() {
assert.equal(
chardet.detectFileSync(base + '/gb18030'),
'GB18030'
);
});
it('should return Big5', function() {
assert.equal(
chardet.detectFileSync(base + '/big5'),
'Big5'
);
});
it('should return EUC-JP', function() {
assert.equal(
chardet.detectFileSync(base + '/euc_jp'),
'EUC-JP'
);
});
it('should return EUC-KR', function() {
assert.equal(
chardet.detectFileSync(base + '/euc_kr'),
'EUC-KR'
);
});
});

111
test/encodings/sbcs.js
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@ -1,111 +0,0 @@
var assert = require('assert'),
chardet = require('../../');
describe('Singlebyte Character Sets', function() {
var base = __dirname + '/../data/encodings';
it('should return ISO-8859-1 (English)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88591_en'), 'ISO-8859-1'
);
});
it('should return ISO-8859-2 (Czech)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88592_cs'), 'ISO-8859-2'
);
});
it('should return ISO-8859-3');
it('should return ISO-8859-4');
it('should return ISO-8859-5 (Russian)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88595_ru'), 'ISO-8859-5'
);
});
it('should return ISO-8859-6 (Arabic)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88596_ar'), 'ISO-8859-6'
);
});
it('should return ISO-8859-7 (Greek)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88597_el'), 'ISO-8859-7'
);
});
it('should return ISO-8859-8 (Hebrew)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88598_he'), 'ISO-8859-8'
);
});
it('should return ISO-8859-9 (Turkish)', function() {
assert.equal(
chardet.detectFileSync(base + '/iso88599_tr'), 'ISO-8859-9'
);
});
it('should return ISO-8859-10');
it('should return ISO-8859-11');
// iso-8859-12 is abandoned
it('should return ISO-8859-13');
it('should return ISO-8859-14');
it('should return ISO-8859-15');
it('should return ISO-8859-16');
it('should return windows-1250 (Czech)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1250'), 'windows-1250'
);
});
it('should return windows-1251 (Russian)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1251'), 'windows-1251'
);
});
it('should return windows-1252 (English)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1252'), 'windows-1252'
);
});
it('should return windows-1253 (Greek)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1253'), 'windows-1253'
);
});
it('should return windows-1254 (Turkish)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1254'), 'windows-1254'
);
});
it('should return windows-1255 (Hebrew)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1255'), 'windows-1255'
);
});
it('should return windows-1256 (Arabic)', function() {
assert.equal(
chardet.detectFileSync(base + '/windows_1256'), 'windows-1256'
);
});
it('should return KOI8-R (Russian)', function() {
assert.equal(
chardet.detectFileSync(base + '/koi8r'), 'KOI8-R'
);
});
});

35
test/encodings/unicode.js
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@ -1,35 +0,0 @@
var assert = require('assert'),
chardet = require('../../');
describe('Unicode', function() {
var base = __dirname + '/../data/encodings';
it('should return UTF-16LE', function() {
assert.equal(
chardet.detectFileSync(base + '/utf16le'),
'UTF-16LE'
);
});
it('should return UTF-16BE', function() {
assert.equal(
chardet.detectFileSync(base + '/utf16be'),
'UTF-16BE'
);
});
it('should return UTF-32LE', function() {
assert.equal(
chardet.detectFileSync(base + '/utf32le'),
'UTF-32LE'
);
});
it('should return UTF-32BE', function() {
assert.equal(
chardet.detectFileSync(base + '/utf32be'),
'UTF-32BE'
);
});
});

11
test/encodings/utf8.js
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@ -1,11 +0,0 @@
var assert = require('assert'),
chardet = require('../../');
describe('UTF-8', function() {
it('should return UTF-8', function() {
assert.equal(
chardet.detectFileSync(__dirname + '/../data/encodings/utf8'),
'UTF-8'
);
});
});

20
tsconfig.json Normal file
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@ -0,0 +1,20 @@
{
"compilerOptions": {
"forceConsistentCasingInFileNames": true,
"outDir": "lib",
"rootDir": "src",
"allowJs": false,
"allowSyntheticDefaultImports": true,
"declaration": true,
"diagnostics": true,
"esModuleInterop": true,
"extendedDiagnostics": true,
"listEmittedFiles": true,
"module": "commonjs",
"removeComments": true,
"sourceMap": true,
"strict": true,
"target": "esnext"
},
"exclude": ["node_modules", "**/*.spec.ts", "**/*.test.ts", "__mocks__"]
}

23
tslint.json Normal file
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@ -0,0 +1,23 @@
{
"extends": "tslint:recommended",
"rules": {
"interface-name": [true, "never-prefix"],
"quotemark": [true, "single"],
"no-bitwise": false,
"trailing-comma": [
true,
{
"multiline": {
"objects": "always",
"arrays": "always",
"functions": "never",
"typeLiterals": "ignore"
},
"esSpecCompliant": true
}
],
"object-literal-sort-keys": false,
"radix": false,
"forin": false
}
}