// IBDAWG
/* jshint esversion:6, -W097 */
/* jslint esversion:6 */
/* global require, exports, console, __dirname */
"use strict";
// Don’t remove <string>. Necessary in TB.
${string}
${map}
${set}
if (typeof(process) !== 'undefined') {
var str_transform = require("./str_transform.js");
var helpers = require("./helpers.js");
var char_player = require("./char_player.js");
}
class SuggResult {
// Structure for storing, classifying and filtering suggestions
constructor (sWord, nSuggLimit=10, nDistLimit=-1) {
this.sWord = sWord;
this.sSimplifiedWord = str_transform.simplifyWord(sWord);
this.nDistLimit = (nDistLimit >= 0) ? nDistLimit : Math.floor(sWord.length / 3) + 1;
this.nMinDist = 1000;
// Temporary sets
this.aAllSugg = new Set(); // All suggestions, even the one rejected
this.dGoodSugg = new Map(); // Acceptable suggestions
this.dBestSugg = new Map(); // Best suggestions
// Parameters
this.nSuggLimit = nSuggLimit;
this.nSuggLimitExt = nSuggLimit + 2; // we add few entries in case suggestions merge after casing modifications
this.nBestSuggLimit = Math.floor(nSuggLimit * 2); // n times the requested limit
this.nGoodSuggLimit = nSuggLimit * 15; // n times the requested limit
}
addSugg (sSugg) {
// add a suggestion
if (this.aAllSugg.has(sSugg)) {
return;
}
this.aAllSugg.add(sSugg);
// jaro 0->1 1 les chaines sont égale
let nDistJaro = 1 - str_transform.distanceJaroWinkler(this.sSimplifiedWord, str_transform.simplifyWord(sSugg));
let nDist = Math.floor(nDistJaro * 10);
if (nDist < this.nMinDist) {
this.nMinDist = nDist;
}
if (nDistJaro < .11) { // Best suggestions
this.dBestSugg.set(sSugg, Math.round(nDistJaro*1000));
if (this.dBestSugg.size > this.nBestSuggLimit) {
this.nDistLimit = -1; // make suggest() to end search
}
} else if (nDistJaro < .33) { // Good suggestions
this.dGoodSugg.set(sSugg, Math.round(nDistJaro*1000));
if (this.dGoodSugg.size > this.nGoodSuggLimit) {
this.nDistLimit = -1; // make suggest() to end search
}
}
this.nDistLimit = Math.min(this.nDistLimit, this.nMinDist+1);
}
getSuggestions () {
// return a list of suggestions
let lRes = [];
if (this.dBestSugg.size > 0) {
// sort only with simplified words
let lResTmp = [...this.dBestSugg.entries()].sort((a, b) => { return a[1] - b[1]; });
let nSize = Math.min(this.nSuggLimitExt, lResTmp.length);
for (let i=0; i < nSize; i++){
lRes.push(lResTmp[i][0]);
}
}
if (lRes.length < this.nSuggLimitExt) {
// sort with simplified words and original word
let lResTmp = [...this.dGoodSugg.entries()].sort((a, b) => {
// Low precision to rely more on simplified words
let nJaroA = Math.round(str_transform.distanceJaroWinkler(this.sWord, a[0]) * 10);
let nJaroB = Math.round(str_transform.distanceJaroWinkler(this.sWord, b[0]) * 10);
if (nJaroA == nJaroB) {
return a[1] - b[1]; // warning: both lists are NOT sorted the same way (key: a-b)
} else {
return nJaroB - nJaroA; // warning: both lists are NOT sorted the same way (key: b-a)
}
}).slice(0, this.nSuggLimitExt);
let nSize = Math.min(this.nSuggLimitExt, lResTmp.length);
for (let i=0; i < nSize; i++){
lRes.push(lResTmp[i][0]);
}
}
// casing
if (this.sWord.gl_isUpperCase()) {
lRes = lRes.map((sSugg) => { return sSugg.toUpperCase(); });
lRes = [...new Set(lRes)];
}
else if (this.sWord.slice(0,1).gl_isUpperCase()) {
lRes = lRes.map((sSugg) => { return sSugg.slice(0,1).toUpperCase() + sSugg.slice(1); });
lRes = [...new Set(lRes)];
}
return lRes.slice(0, this.nSuggLimit);
}
}
class IBDAWG {
// INDEXABLE BINARY DIRECT ACYCLIC WORD GRAPH
constructor (source, sPath="") {
// <source> can be a filename or a object with all the necessary data.
try {
let oData = null;
if (typeof(source) == "string") {
let sURL;
if (typeof(process) !== 'undefined') {
sURL = (sPath !== "") ? sPath + "/" + source : __dirname + "/_dictionaries/"+source;
} else {
sURL = (sPath !== "") ? sPath + "/" + source : "resource://grammalecte/graphspell/_dictionaries/"+source;
}
oData = JSON.parse(helpers.loadFile(sURL));
} else {
oData = source;
}
Object.assign(this, oData);
}
catch (e) {
console.error(e);
console.log("path: " + sPath);
console.log("dic:" + source.slice(0, 1000));
throw Error("# Error. File not found or not loadable.\n" + e.message + "\n");
}
/*
Properties:
sName, sHeader, lArcVal, nArcVal, sByDic, sLang, nChar, nBytesArc, nBytesNodeAddress,
nEntry, nNode, nArc, nAff, cStemming, nTag, dChar, nBytesOffset,
*/
if (!(this.sHeader.startsWith("/grammalecte-fsa/") || this.sHeader.startsWith("/pyfsa/"))) {
throw TypeError("# Error. Not a grammalecte-fsa binary dictionary. Header: " + this.sHeader);
}
// <dChar> to get the value of an arc, <dCharVal> to get the char of an arc with its value
this.dChar = helpers.objectToMap(this.dChar);
this.dCharVal = this.dChar.gl_reverse();
this.a2grams = (this.l2grams) ? new Set(this.l2grams) : null;
if (!this.hasOwnProperty("lByDic")) {
// old dictionary version
if (!this.hasOwnProperty("sByDic")) {
throw TypeError("# Error. No usable data in the dictionary.");
}
this.lByDic = [];
let nAcc = 0;
let lBytesBuffer = [];
let nDivisor = (this.nBytesArc + this.nBytesNodeAddress) / 2;
for (let i = 0; i < this.sByDic.length; i+=2) {
lBytesBuffer.push(parseInt(this.sByDic.slice(i, i+2), 16));
if (nAcc == (this.nBytesArc - 1)) {
this.lByDic.push(this._convBytesToInteger(lBytesBuffer));
lBytesBuffer = [];
}
else if (nAcc == (this.nBytesArc + this.nBytesNodeAddress - 1)) {
this.lByDic.push(Math.round(this._convBytesToInteger(lBytesBuffer) / nDivisor)); // Math.round should be useless, BUT with JS who knowns what can happen…
lBytesBuffer = [];
nAcc = -1;
}
nAcc = nAcc + 1;
}
}
// masks
this._arcMask = (2 ** ((this.nBytesArc * 8) - 3)) - 1;
this._finalNodeMask = 1 << ((this.nBytesArc * 8) - 1);
this._lastArcMask = 1 << ((this.nBytesArc * 8) - 2);
// function to decode the affix/suffix code
if (this.cStemming == "S") {
this.funcStemming = str_transform.changeWordWithSuffixCode;
} else if (this.cStemming == "A") {
this.funcStemming = str_transform.changeWordWithAffixCode;
} else {
this.funcStemming = str_transform.noStemming;
}
//console.log(this.getInfo());
this.bAcronymValid = true;
this.bNumAtLastValid = false;
// lexicographer module ?
this.lexicographer = null;
// JS still sucks: we’ll try importation when importation will be available in Workers. Still waiting...
if (self && self.hasOwnProperty("lexgraph_"+this.sLangCode)) { // self is the Worker
this.lexicographer = self["lexgraph_"+this.sLangCode];
}
}
getInfo () {
return ` Language: ${this.sLangName} Lang code: ${this.sLangCode} Dictionary name: ${this.sDicName}\n` +
` Date: ${this.sDate} Stemming: ${this.cStemming}FX\n` +
` Arcs values: ${this.nArcVal} = ${this.nChar} characters, ${this.nAff} affixes, ${this.nTag} tags\n` +
` Dictionary: ${this.nEntry} entries, ${this.nNode} nodes, ${this.nArc} arcs\n` +
` Address size: ${this.nBytesNodeAddress} bytes, Arc size: ${this.nBytesArc} bytes\n`;
}
getJSON () {
let oJSON = {
"sHeader": "/grammalecte-fsa/",
"sLangCode": this.sLangCode,
"sLangName": this.sLangName,
"sDicName": this.sDicName,
"sDescription": this.sDescription,
"sFileName": this.sFileName,
"sDate": this.sDate,
"nEntry": this.nEntry,
"nChar": this.nChar,
"nAff": this.nAff,
"nTag": this.nTag,
"cStemming": this.cStemming,
"dChar": helpers.mapToObject(this.dChar),
"nNode": this.nNode,
"nArc": this.nArc,
"lArcVal": this.lArcVal,
"nArcVal": this.nArcVal,
"nBytesArc": this.nBytesArc,
"nBytesNodeAddress": this.nBytesNodeAddress,
"nBytesOffset": this.nBytesOffset,
"sByDic": this.sByDic, // binary word graph
"l2grams": this.l2grams
};
return oJSON;
}
isValidToken (sToken) {
// checks if sToken is valid (if there is hyphens in sToken, sToken is split, each part is checked)
sToken = str_transform.spellingNormalization(sToken);
if (this.isValid(sToken)) {
return true;
}
if (sToken.includes("-")) {
if (sToken.gl_count("-") > 4) {
return true;
}
return sToken.split("-").every(sWord => this.isValid(sWord));
}
if (sToken.includes(".") || sToken.includes("·")) {
return true;
}
return false;
}
isValid (sWord) {
// checks if sWord is valid (different casing tested if the first letter is a capital)
if (!sWord) {
return true;
}
if (this.lookup(sWord)) {
return true;
}
if (sWord.charAt(0).gl_isUpperCase()) {
if (sWord.length > 1) {
if (sWord.gl_isTitle()) {
return !!this.lookup(sWord.toLowerCase());
}
if (sWord.gl_isUpperCase()) {
return !!(this.bAcronymValid || this.lookup(sWord.toLowerCase()) || this.lookup(sWord.gl_toCapitalize()));
}
return !!this.lookup(sWord.slice(0, 1).toLowerCase() + sWord.slice(1));
}
return !!this.lookup(sWord.toLowerCase());
}
if (sWord.slice(0,1).gl_isDigit()) {
return true;
}
return false;
}
_convBytesToInteger (aBytes) {
// Byte order = Big Endian (bigger first)
let nVal = 0;
let nWeight = (aBytes.length - 1) * 8;
for (let n of aBytes) {
nVal += n << nWeight;
nWeight = nWeight - 8;
}
return nVal;
}
lookup (sWord) {
// returns true if sWord in dictionary (strict verification)
let iAddr = 0;
for (let c of sWord) {
if (!this.dChar.has(c)) {
return false;
}
iAddr = this._lookupArcNode(this.dChar.get(c), iAddr);
if (iAddr === null) {
return false;
}
}
return Boolean(this.lByDic[iAddr] & this._finalNodeMask);
}
getMorph (sWord) {
// retrieves morphologies list, different casing allowed
if (!sWord) {
return [];
}
sWord = str_transform.spellingNormalization(sWord);
let l = this._morph(sWord);
if (sWord[0].gl_isUpperCase()) {
l.push(...this._morph(sWord.toLowerCase()));
if (sWord.gl_isUpperCase() && sWord.length > 1) {
l.push(...this._morph(sWord.gl_toCapitalize()));
}
}
return l;
}
suggest (sWord, nSuggLimit=10, bSplitTrailingNumbers=false) {
// returns a array of suggestions for <sWord>
//console.time("Suggestions for " + sWord);
sWord = str_transform.spellingNormalization(sWord);
let sPfx = "";
let sSfx = "";
if (this.lexicographer) {
[sPfx, sWord, sSfx] = this.lexicographer.split(sWord);
}
let nMaxSwitch = Math.max(Math.floor(sWord.length / 3), 1);
let nMaxDel = Math.floor(sWord.length / 5);
let nMaxHardRepl = Math.max(Math.floor((sWord.length - 5) / 4), 1);
let nMaxJump = Math.max(Math.floor(sWord.length / 4), 1);
let oSuggResult = new SuggResult(sWord, nSuggLimit);
sWord = str_transform.cleanWord(sWord);
if (bSplitTrailingNumbers) {
this._splitTrailingNumbers(oSuggResult, sWord);
}
this._splitSuggest(oSuggResult, sWord);
this._suggest(oSuggResult, sWord);
this._suggest(oSuggResult, sWord, nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump);
let aSugg = oSuggResult.getSuggestions();
if (sSfx || sPfx) {
// we add what we removed
return aSugg.map( (sSugg) => { return sPfx + sSugg + sSfx; } );
}
//console.timeEnd("Suggestions for " + sWord);
return aSugg;
}
_splitTrailingNumbers (oSuggResult, sWord) {
let m = /^([a-zA-Zà-öÀ-Ö_ø-ÿØ-ßĀ-ʯfi-st][a-zA-Zà-öÀ-Ö_ø-ÿØ-ßĀ-ʯfi-st-]+)([0-9]+)$/.exec(sWord);
if (m && !m[1].endsWith("-") && !m[1].endsWith("_")) {
oSuggResult.addSugg(m[1] + " " + str_transform.numbersToExponent(m[2]));
}
}
_splitSuggest (oSuggResult, sWord) {
// split at apostrophes
for (let cSplitter of "'’") {
if (sWord.includes(cSplitter)) {
let [sWord1, sWord2] = sWord.split(cSplitter, 2);
if (this.isValid(sWord1) && this.isValid(sWord2)) {
oSuggResult.addSugg(sWord1+" "+sWord2);
}
}
}
}
_suggest (oSuggResult, sRemain, nMaxSwitch=0, nMaxDel=0, nMaxHardRepl=0, nMaxJump=0, nDist=0, nDeep=0, iAddr=0, sNewWord="", bAvoidLoop=false) {
// returns a set of suggestions
// recursive function
if (this.lByDic[iAddr] & this._finalNodeMask) {
if (sRemain == "") {
oSuggResult.addSugg(sNewWord);
for (let sTail of this._getTails(iAddr)) {
oSuggResult.addSugg(sNewWord+sTail);
}
return;
}
else if ( (sNewWord.length + sRemain.length == oSuggResult.sWord.length) && oSuggResult.sWord.toLowerCase().startsWith(sNewWord.toLowerCase()) && this.isValid(sRemain) ) {
if (this.sLangCode == "fr"
&& ["l", "d", "n", "m", "t", "s", "c", "j", "qu", "lorsqu", "puisqu", "quoiqu", "jusqu", "quelqu"].includes(sNewWord.toLowerCase()) && char_player.aVowel.has(sRemain.slice(0,1))) {
oSuggResult.addSugg(sNewWord+"’"+sRemain);
}
if ((sNewWord.length > 1 && sRemain.length > 1) || ["a", "à", "y"].includes(sNewWord) || ["a", "à", "y"].includes(sRemain)) {
oSuggResult.addSugg(sNewWord+" "+sRemain);
}
}
}
if (nDist > oSuggResult.nDistLimit) {
return;
}
let cCurrent = sRemain.slice(0, 1);
for (let [cChar, jAddr] of this._getCharArcs(iAddr)) {
if (char_player.d1to1.gl_get(cCurrent, cCurrent).indexOf(cChar) != -1) {
this._suggest(oSuggResult, sRemain.slice(1), nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, jAddr, sNewWord+cChar);
}
else if (!bAvoidLoop) {
if (nMaxHardRepl && this.isNgramsOK(cChar+sRemain.slice(1,2))) {
this._suggest(oSuggResult, sRemain.slice(1), nMaxSwitch, nMaxDel, nMaxHardRepl-1, nMaxJump, nDist+1, nDeep+1, jAddr, sNewWord+cChar, true);
}
if (nMaxJump) {
this._suggest(oSuggResult, sRemain, nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump-1, nDist+1, nDeep+1, jAddr, sNewWord+cChar, true); // true for avoiding loop?
}
}
}
if (!bAvoidLoop) { // avoid infinite loop
if (sRemain.length > 1) {
if (cCurrent == sRemain.slice(1, 2)) {
// same char, we remove 1 char without adding 1 to <sNewWord>
this._suggest(oSuggResult, sRemain.slice(1), nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord);
}
else {
// switching chars
if (nMaxSwitch > 0 && this.isNgramsOK(sNewWord.slice(-1)+sRemain.slice(1,2)) && this.isNgramsOK(sRemain.slice(1,2)+sRemain.slice(0,1))) {
this._suggest(oSuggResult, sRemain.slice(1, 2)+sRemain.slice(0, 1)+sRemain.slice(2), nMaxSwitch-1, nMaxDel, nMaxHardRepl, nMaxJump, nDist+1, nDeep+1, iAddr, sNewWord, true);
}
// delete char
if (nMaxDel > 0 && this.isNgramsOK(sNewWord.slice(-1)+sRemain.slice(1,2))) {
this._suggest(oSuggResult, sRemain.slice(1), nMaxSwitch, nMaxDel-1, nMaxHardRepl, nMaxJump, nDist+1, nDeep+1, iAddr, sNewWord, true);
}
}
// Phonetic replacements
for (let sRepl of char_player.get1toXReplacement(sNewWord.slice(-1), cCurrent, sRemain.slice(1,2))) {
this._suggest(oSuggResult, sRepl + sRemain.slice(1), nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord, true);
}
for (let sRepl of char_player.d2toX.gl_get(sRemain.slice(0, 2), [])) {
this._suggest(oSuggResult, sRepl + sRemain.slice(2), nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord, true);
}
}
// end of word
if (sRemain.length == 2) {
for (let sRepl of char_player.dFinal2.gl_get(sRemain, [])) {
this._suggest(oSuggResult, sRepl, nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord, true);
}
}
else if (sRemain.length == 1) {
this._suggest(oSuggResult, "", nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord, true); // remove last char and go on
for (let sRepl of char_player.dFinal1.gl_get(sRemain, [])) {
this._suggest(oSuggResult, sRepl, nMaxSwitch, nMaxDel, nMaxHardRepl, nMaxJump, nDist, nDeep+1, iAddr, sNewWord, true);
}
}
}
}
isNgramsOK (sChars) {
if (sChars.length != 2) {
return true;
}
if (!this.a2grams) {
return true;
}
return this.a2grams.has(sChars);
}
* _getCharArcs (iAddr) {
// generator: yield all chars and addresses from node at address <iAddr>
for (let [nVal, jAddr] of this._getArcs(iAddr)) {
if (nVal <= this.nChar) {
yield [this.dCharVal.get(nVal), jAddr];
}
}
}
* _getSimilarCharArcs (cChar, iAddr) {
// generator: yield similar char of <cChar> and address of the following node
for (let c of char_player.d1to1.gl_get(cChar, [cChar])) {
if (this.dChar.has(c)) {
let jAddr = this._lookupArcNode(this.dChar.get(c), iAddr);
if (jAddr) {
yield [c, jAddr];
}
}
}
}
_getTails (iAddr, sTail="", n=2) {
// return a list of suffixes ending at a distance of <n> from <iAddr>
let aTails = new Set();
for (let [nVal, jAddr] of this._getArcs(iAddr)) {
if (nVal <= this.nChar) {
if (this.lByDic[jAddr] & this._finalNodeMask) {
aTails.add(sTail + this.dCharVal.get(nVal));
}
if (n && aTails.size == 0) {
aTails.gl_update(this._getTails(jAddr, sTail+this.dCharVal.get(nVal), n-1));
}
}
}
return aTails;
}
getSimilarEntries (sWord, nSuggLimit=10) {
// return a list of tuples (similar word, stem, morphology)
if (sWord == "") {
return [];
}
let lResult = [];
for (let sSimilar of this.suggest(sWord, nSuggLimit)) {
for (let sMorph of this.getMorph(sSimilar)) {
let nCut = sMorph.indexOf("/");
lResult.push( [sSimilar, sMorph.slice(1, nCut), sMorph.slice(nCut+1)] );
}
}
return lResult;
}
* select (sFlexPattern="", sTagsPattern="") {
// generator: returns all entries which flexion fits <sFlexPattern> and morphology fits <sTagsPattern>
let zFlexPattern = null;
let zTagsPattern = null;
try {
zFlexPattern = (sFlexPattern !== "") ? new RegExp(sFlexPattern) : null;
zTagsPattern = (sTagsPattern !== "") ? new RegExp(sTagsPattern) : null;
}
catch (e) {
console.log("Error in regex pattern");
console.log(e.message);
}
yield* this._select(zFlexPattern, zTagsPattern, 0, "");
}
* _select (zFlexPattern, zTagsPattern, iAddr, sWord) {
// recursive generator
for (let [nVal, jAddr] of this._getArcs(iAddr)) {
if (nVal <= this.nChar) {
// simple character
yield* this._select(zFlexPattern, zTagsPattern, jAddr, sWord + this.lArcVal[nVal]);
} else {
if (!zFlexPattern || zFlexPattern.test(sWord)) {
let sStem = this.funcStemming(sWord, this.lArcVal[nVal]);
for (let [nMorphVal, _] of this._getArcs(jAddr)) {
if (!zTagsPattern || zTagsPattern.test(this.lArcVal[nMorphVal])) {
yield [sWord, sStem, this.lArcVal[nMorphVal]];
}
}
}
}
}
}
_morph (sWord) {
// returns morphologies of sWord
let iAddr = 0;
for (let c of sWord) {
if (!this.dChar.has(c)) {
return [];
}
iAddr = this._lookupArcNode(this.dChar.get(c), iAddr);
if (iAddr === null) {
return [];
}
}
if (this.lByDic[iAddr] & this._finalNodeMask) {
let l = [];
let nRawArc = 0;
while (!(nRawArc & this._lastArcMask)) {
let iEndArcAddr = iAddr + 1;
nRawArc = this.lByDic[iAddr];
let nArc = nRawArc & this._arcMask;
if (nArc > this.nChar) {
// This value is not a char, this is a stemming code
let sStem = ">" + this.funcStemming(sWord, this.lArcVal[nArc]);
// Now , we go to the next node and retrieve all following arcs values, all of them are tags
let iAddr2 = this.lByDic[iEndArcAddr];
let nRawArc2 = 0;
while (!(nRawArc2 & this._lastArcMask)) {
let iEndArcAddr2 = iAddr2 + 1;
nRawArc2 = this.lByDic[iAddr2];
l.push(sStem + "/" + this.lArcVal[nRawArc2 & this._arcMask]);
iAddr2 = iEndArcAddr2 + 1;
}
}
iAddr = iEndArcAddr + 1;
}
return l;
}
return [];
}
_stem (sWord) {
// returns stems list of sWord
let iAddr = 0;
for (let c of sWord) {
if (!this.dChar.has(c)) {
return [];
}
iAddr = this._lookupArcNode(this.dChar.get(c), iAddr);
if (iAddr === null) {
return [];
}
}
if (this.lByDic[iAddr] & this._finalNodeMask) {
let l = [];
let nRawArc = 0;
while (!(nRawArc & this._lastArcMask)) {
let iEndArcAddr = iAddr + 1;
nRawArc = this.lByDic[iAddr];
let nArc = nRawArc & this._arcMask;
if (nArc > this.nChar) {
// This value is not a char, this is a stemming code
l.push(this.funcStemming(sWord, this.lArcVal[nArc]));
}
iAddr = iEndArcAddr + 1;
}
return l;
}
return [];
}
_lookupArcNode (nVal, iAddr) {
// looks if nVal is an arc at the node at iAddr, if yes, returns address of next node else None
while (true) {
let iEndArcAddr = iAddr+1;
let nRawArc = this.lByDic[iAddr];
if (nVal == (nRawArc & this._arcMask)) {
// the value we are looking for
// we return the address of the next node
return this.lByDic[iEndArcAddr];
}
else {
// value not found
if (nRawArc & this._lastArcMask) {
return null;
}
iAddr = iEndArcAddr + 1;
}
}
}
* _getArcs (iAddr) {
// generator: return all arcs at <iAddr> as tuples of (nVal, iAddr)
while (true) {
let iEndArcAddr = iAddr+1;
let nRawArc = this.lByDic[iAddr];
yield [nRawArc & this._arcMask, this.lByDic[iEndArcAddr]];
if (nRawArc & this._lastArcMask) {
break;
}
iAddr = iEndArcAddr+1;
}
}
}
if (typeof(exports) !== 'undefined') {
exports.IBDAWG = IBDAWG;
}