Merge pull request #37 from runk/major-dev-deps

Major dev deps

.eslintignore

@@ -0,0 +1,2 @@
+lib
+jest.config.js

.eslintrc.json

@@ -0,0 +1,10 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "rules": {
+    "@typescript-eslint/no-unused-vars": ["warn", { "varsIgnorePattern": "_" }],
+    "@typescript-eslint/no-inferrable-types": ["off"]
+  }
+}

.travis.yml

@@ -1,8 +1,8 @@
 language: node_js
 node_js:
-  - "8"
   - "10"
   - "12"
+  - "14"
 
 jobs:
   include:

package.json

@@ -14,7 +14,7 @@
   },
   "scripts": {
     "build": "rm -rf lib/* && tsc",
-    "lint": "tslint -p tsconfig.json -c tslint.json",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
     "lint:types": "tsc --noEmit",
     "format": "prettier --write ./src/**/*.ts",
     "format:check": "prettier --list-different ./src/**/*.ts",
@@ -33,14 +33,16 @@
     "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"
+    "@types/jest": "^26.0.14",
+    "@types/node": "^14.11.2",
+    "@typescript-eslint/eslint-plugin": "^4.2.0",
+    "@typescript-eslint/parser": "^4.2.0",
+    "eslint": "^7.9.0",
+    "jest": "^26.4.2",
+    "prettier": "^2.1.2",
+    "semantic-release": "^17.1.2",
+    "ts-jest": "^26.4.0",
+    "typescript": "^4.0.3"
   },
   "keywords": [
     "encoding",

src/encoding/iso2022.test.ts

@@ -1,7 +1,7 @@
 import * as chardet from '..';
 
 describe('ISO-2022', () => {
-  var base = __dirname + '/../test/data/encodings';
+  const base = __dirname + '/../test/data/encodings';
 
   it('should return ISO-2022-JP', () => {
     expect(chardet.detectFileSync(base + '/iso2022jp')).toBe('ISO-2022-JP');

src/encoding/iso2022.ts

@@ -1,6 +1,5 @@
 import { Context, Recogniser } from '.';
-
-var match = require('../match').default;
+import match, { Match } from '../match';
 
 /**
  * This is a superclass for the individual detectors for
@@ -15,7 +14,7 @@ class ISO_2022 implements Recogniser {
     return 'ISO_2022';
   }
 
-  match(det: Context) {
+  match(det: Context): Match | null {
     /**
      * Matching function shared among the 2022 detectors JP, CN and KR
      * Counts up the number of legal an unrecognized escape sequences in
@@ -29,16 +28,16 @@ class ISO_2022 implements Recogniser {
      * @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;
+    let i, j;
+    let escN;
+    let hits = 0;
+    let misses = 0;
+    let shifts = 0;
+    let quality;
 
     // TODO: refactor me
-    var text = det.fInputBytes;
-    var textLen = det.fInputLen;
+    const text = det.fInputBytes;
+    const textLen = det.fInputLen;
 
     scanInput: for (i = 0; i < textLen; i++) {
       if (text[i] == 0x1b) {
@@ -47,7 +46,7 @@ class ISO_2022 implements Recogniser {
           escN < this.escapeSequences.length;
           escN++
         ) {
-          var seq = this.escapeSequences[escN];
+          const seq = this.escapeSequences[escN];
 
           if (textLen - i < seq.length) continue checkEscapes;
 

src/encoding/mbcs.test.ts

@@ -1,7 +1,7 @@
 import * as chardet from '..';
 
 describe('Multibyte Character Sets', () => {
-  var base = __dirname + '/../test/data/encodings';
+  const base = __dirname + '/../test/data/encodings';
 
   it('should return Shift_JIS', () => {
     expect(chardet.detectFileSync(base + '/shiftjis')).toBe('Shift_JIS');

src/encoding/mbcs.ts

@@ -1,5 +1,5 @@
 import { Context, Recogniser } from '.';
-var match = require('../match').default;
+import match, { Match } from '../match';
 
 /**
  * Binary search implementation (recursive)
@@ -18,7 +18,7 @@ function binarySearch(arr: number[], searchValue: number) {
     There is a bug in the above line;
     Joshua Bloch suggests the following replacement:
     */
-    var mid = Math.floor((left + right) >>> 1);
+    const 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);
@@ -68,7 +68,7 @@ class IteratedChar {
       this.done = true;
       return -1;
     }
-    var byteValue = det.fRawInput[this.nextIndex++] & 0x00ff;
+    const byteValue = det.fRawInput[this.nextIndex++] & 0x00ff;
     return byteValue;
   }
 }
@@ -97,23 +97,23 @@ class mbcs implements Recogniser {
    *             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?
+  match(det: Context): Match | null {
+    let singleByteCharCount = 0, //TODO Do we really need this?
       doubleByteCharCount = 0,
       commonCharCount = 0,
       badCharCount = 0,
       totalCharCount = 0,
       confidence = 0;
 
-    var iter = new IteratedChar();
+    const iter = new IteratedChar();
 
     detectBlock: {
       for (iter.reset(); this.nextChar(iter, det); ) {
         totalCharCount++;
         if (iter.error) {
           badCharCount++;
         } else {
-          var cv = iter.charValue & 0xffffffff;
+          const cv = iter.charValue & 0xffffffff;
 
           if (cv <= 0xff) {
             singleByteCharCount++;
@@ -159,20 +159,17 @@ class mbcs implements Recogniser {
       }
 
       if (this.commonChars == null) {
-        // We have no statistics on frequently occuring characters.
+        // We have no statistics on frequently occurring 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;
+        const maxVal = Math.log(doubleByteCharCount / 4);
+        const scaleFactor = 90.0 / maxVal;
         confidence = Math.floor(
           Math.log(commonCharCount + 1) * scaleFactor + 10
         );
@@ -278,14 +275,13 @@ export class sjis extends mbcs {
     iter.index = iter.nextIndex;
     iter.error = false;
 
-    var firstByte;
-    firstByte = iter.charValue = iter.nextByte(det);
+    const 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);
+    const secondByte = iter.nextByte(det);
     if (secondByte < 0) return false;
 
     iter.charValue = (firstByte << 8) | secondByte;
@@ -418,14 +414,14 @@ export class big5 extends mbcs {
     iter.index = iter.nextIndex;
     iter.error = false;
 
-    var firstByte = (iter.charValue = iter.nextByte(det));
+    const 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);
+    const secondByte = iter.nextByte(det);
 
     if (secondByte < 0) return false;
 
@@ -450,9 +446,9 @@ export class big5 extends mbcs {
 function eucNextChar(iter: IteratedChar, det: Context) {
   iter.index = iter.nextIndex;
   iter.error = false;
-  var firstByte = 0;
-  var secondByte = 0;
-  var thirdByte = 0;
+  let firstByte = 0;
+  let secondByte = 0;
+  let thirdByte = 0;
   //int fourthByte = 0;
   buildChar: {
     firstByte = iter.charValue = iter.nextByte(det);
@@ -763,10 +759,10 @@ export class gb_18030 extends mbcs {
   nextChar(iter: IteratedChar, det: Context) {
     iter.index = iter.nextIndex;
     iter.error = false;
-    var firstByte = 0;
-    var secondByte = 0;
-    var thirdByte = 0;
-    var fourthByte = 0;
+    let firstByte = 0;
+    let secondByte = 0;
+    let thirdByte = 0;
+    let fourthByte = 0;
     buildChar: {
       firstByte = iter.charValue = iter.nextByte(det);
       if (firstByte < 0) {

src/encoding/sbcs.test.ts

@@ -1,7 +1,7 @@
 import * as chardet from '..';
 
 describe('Singlebyte Character Sets', () => {
-  var base = __dirname + '/../test/data/encodings';
+  const base = __dirname + '/../test/data/encodings';
 
   it('should return ISO-8859-1 (English)', () => {
     expect(chardet.detectFileSync(base + '/iso88591_en')).toBe('ISO-8859-1');

src/encoding/sbcs.ts

@@ -1,13 +1,12 @@
 import { Context, Recogniser } from '../encoding/index';
-
-var match = require('../match').default;
+import match, { Match } from '../match';
 
 /**
  * This class recognizes single-byte encodings. Because the encoding scheme is so
  * simple, language statistics are used to do the matching.
  */
 
-var N_GRAM_MASK = 0xffffff;
+const N_GRAM_MASK = 0xffffff;
 
 class NGramParser {
   byteIndex: number = 0;
@@ -31,7 +30,7 @@ class NGramParser {
    * Binary search for value in table, which must have exactly 64 entries.
    */
   search(table: number[], value: number) {
-    var index = 0;
+    let index = 0;
 
     if (table[index + 32] <= value) index += 32;
     if (table[index + 16] <= value) index += 16;
@@ -65,12 +64,12 @@ class NGramParser {
   }
 
   parse(det: Context, spaceCh: number) {
-    var b,
+    let b,
       ignoreSpace = false;
     this.spaceChar = spaceCh;
 
     while ((b = this.nextByte(det)) >= 0) {
-      var mb = this.byteMap[b];
+      const mb = this.byteMap[b];
 
       // TODO: 0x20 might not be a space in all character sets...
       if (mb != 0) {
@@ -85,7 +84,7 @@ class NGramParser {
     // 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;
+    const 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...
@@ -119,35 +118,34 @@ class sbcs implements Recogniser {
     return [];
   }
 
-  // @ts-ignore
   name(input: Context): string {
     return 'sbcs';
   }
 
-  match(det: Context) {
-    var ngrams = this.ngrams();
+  match(det: Context): Match | null {
+    const ngrams = this.ngrams();
 
     if (isFlatNgrams(ngrams)) {
-      var parser = new NGramParser(ngrams, this.byteMap());
-      var confidence = parser.parse(det, this.spaceChar);
+      const parser = new NGramParser(ngrams, this.byteMap());
+      const confidence = parser.parse(det, this.spaceChar);
       return confidence <= 0 ? null : match(det, this, confidence);
     }
 
-    var bestConfidenceSoFar = -1;
-    var lang = null;
+    let bestConfidenceSoFar = -1;
+    let lang;
 
-    for (var i = ngrams.length - 1; i >= 0; i--) {
-      var ngl = ngrams[i];
+    for (let i = ngrams.length - 1; i >= 0; i--) {
+      const ngl = ngrams[i];
 
-      var parser = new NGramParser(ngl.fNGrams, this.byteMap());
-      var confidence = parser.parse(det, this.spaceChar);
+      const parser = new NGramParser(ngl.fNGrams, this.byteMap());
+      const confidence = parser.parse(det, this.spaceChar);
       if (confidence > bestConfidenceSoFar) {
         bestConfidenceSoFar = confidence;
         lang = ngl.fLang;
       }
     }
 
-    var name = this.name(det);
+    const name = this.name(det);
     return bestConfidenceSoFar <= 0
       ? null
       : match(det, this, bestConfidenceSoFar, name, lang);

src/encoding/unicode.test.ts

@@ -1,7 +1,7 @@
 import * as chardet from '..';
 
 describe('Unicode', () => {
-  var base = __dirname + '/../test/data/encodings';
+  const base = __dirname + '/../test/data/encodings';
 
   it('should return UTF-16LE', () => {
     expect(chardet.detectFileSync(base + '/utf16le')).toBe('UTF-16LE');