How to use isEOF method in wpt

Best JavaScript code snippet using wpt

line-navigator.js

Source:line-navigator.js Github

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1;2/* https://github.com/anpur/line-navigator Anton Purin MIT 2016 */3var getLineNavigatorClass = function() {4 function LineNavigator (file, options) {5 var self = this;6 // options init 7 options = options ? options : {}; 8 var encoding = options.encoding ? options.encoding : 'utf8';9 var chunkSize = options.chunkSize ? options.chunkSize : 1024 * 4;10 var milestones = [];11 var wrapper = new FileWrapper(file, encoding);12 var oldFileSize = wrapper.getSize();13 var getFileSize = function (position) {14 return oldFileSize = oldFileSize > position15 ? oldFileSize 16 : wrapper.getSize(file);17 }18 var getProgressSimple = function(position) {19 var size = getFileSize(position);20 return Math.round(100 * position / size);21 }22 self.readSomeLines = function(index, callback) {23 var place = self.getPlaceToStart(index, milestones); 24 wrapper.readChunk(place.offset, chunkSize, function readChunkCallback(err, buffer, bytesRead) { 25 if (err) return callback(err, index);26 var isEof = bytesRead < chunkSize;27 28 var chunkContent = self.examineChunk(buffer, bytesRead, isEof); 29 if (chunkContent === undefined)30 return callback('Line ' + index + ' is out of index, last available: ' + (milestones.length > 0 ? milestones[milestones.length - 1].lastLine : "none"), index);31 var inChunk = { 32 firstLine: place.firstLine, 33 lastLine: place.firstLine + chunkContent.lines - 1, 34 offset: place.offset,35 length: chunkContent.length + 136 };37 if (place.isNew) 38 milestones.push(inChunk); 39 var targetInChunk = inChunk.firstLine <= index && index <= inChunk.lastLine;40 if (targetInChunk) {41 var bomOffset = place.offset !== 0 ? 0 : self.getBomOffset(buffer, encoding);42 wrapper.decode(buffer.slice(bomOffset, inChunk.length), function(text) {43 var expectedLinesCount = inChunk.lastLine - inChunk.firstLine + (isEof ? 2 : 1);44 45 var lines = text.split(self.splitLinesPattern); 46 if (!isEof)47 lines = lines.slice(0, lines.length - 1); 48 if (index != inChunk.firstLine)49 lines = lines.splice(index - inChunk.firstLine); 50 51 callback(undefined, index, lines, isEof, getProgressSimple(inChunk.offset + inChunk.length), inChunk);52 });53 } else {54 if (!isEof) { 55 place = self.getPlaceToStart(index, milestones);56 wrapper.readChunk(place.offset, chunkSize, readChunkCallback);57 } else {58 return callback('Line ' + index + ' is out of index, last available: ' + inChunk.lastLine, index);59 }60 } 61 });62 }; 63 self.readLines = function(index, count, callback) {64 if (count === 0) 65 return callback(undefined, index, [], false, 0); 66 var result = [];67 self.readSomeLines(index, function readLinesCallback(err, partIndex, lines, isEof, progress, inChunk) {68 if (err) return callback(err, index);69 var resultEof = !isEof70 ? false71 : partIndex + lines.length <= index + count;72 result = result.concat(lines);73 if (result.length >= count || isEof) {74 result = result.splice(0, count);75 var progress = self.getProgress(inChunk, index + result.length - 1, getFileSize(inChunk.offset + inChunk.length));76 return callback(undefined, index, result, resultEof, progress);77 }78 self.readSomeLines(partIndex + lines.length, readLinesCallback);79 });80 };81 self.find = function(regex, index, callback) {82 self.readSomeLines(index, function readSomeLinesHandler(err, firstLine, lines, isEof, progress) {83 if (err) return callback(err);84 for (var i = 0; i < lines.length; i++) {85 var match = self.searchInLine(regex, lines[i]);86 if (match) 87 return callback(undefined, firstLine + i, match); 88 }89 if (isEof) 90 return callback();91 self.readSomeLines(firstLine + lines.length + 1, readSomeLinesHandler);92 });93 };94 self.findAll = function(regex, index, limit, callback) {95 var results = [];96 self.readSomeLines(index, function readSomeLinesHandler(err, firstLine, lines, isEof) {97 if (err) return callback(err, index);98 for (var i = 0; i < lines.length; i++) {99 var match = self.searchInLine(regex, lines[i]);100 if (match) {101 match.index = firstLine + i;102 results.push(match);103 if (results.length >= limit)104 return callback(undefined, index, true, results);105 }106 }107 if (isEof)108 return callback(undefined, index, false, results);109 self.readSomeLines(firstLine + lines.length, readSomeLinesHandler);110 });111 };112 }113 LineNavigator.prototype.splitLinesPattern = /\r\n|\n|\r/;114 LineNavigator.prototype.getProgress = function (milestone, index, fileSize) {115 var linesInMilestone = milestone.lastLine - milestone.firstLine + 1;116 var indexNumberInMilestone = index - milestone.firstLine;117 var indexLineAssumablePosition = index !== milestone.lastLine 118 ? milestone.offset + milestone.length / linesInMilestone * indexNumberInMilestone119 : milestone.offset + milestone.length;120 return Math.floor(100 * (indexLineAssumablePosition / fileSize));121 }122 LineNavigator.prototype.searchInLine = function(regex, line) {123 var match = regex.exec(line);124 return !match 125 ? null 126 : {127 offset: line.indexOf(match[0]),128 length: match[0].length,129 line: line130 };131 }132 LineNavigator.prototype.getPlaceToStart = function (index, milestones) {133 for (var i = milestones.length - 1; i >= 0; i--) {134 if (milestones[i].lastLine < index) 135 return { 136 firstLine: milestones[i].lastLine + 1, 137 offset: milestones[i].offset + milestones[i].length,138 isNew: i === milestones.length - 1139 };140 }141 return { firstLine: 0, offset: 0, isNew: milestones.length === 0 };142 }143 // searches for line end, which can be \r\n, \n or \r (Windows, *nix, MacOs line endings)144 // returns line end postion including all line ending145 LineNavigator.prototype.getLineEnd = function (buffer, start, end, isEof) {146 var newLineCode = '\n'.charCodeAt(0);147 var caretReturnCode = '\r'.charCodeAt(0);148 for (var i = start; i < end; i++) {149 var char = buffer[i];150 if (char === newLineCode) {151 return i;152 } else if (char === caretReturnCode) {153 // \r is a last character in a given buffer and it is not the end of file yet, so it could be \r\n sequence which was separated154 var canBeSplitted = (i == end - 1) && !isEof; 155 if (!canBeSplitted) {156 return buffer[i + 1] === newLineCode 157 ? i + 1 158 : i;159 } else {160 return undefined;161 }162 }163 }164 }165 LineNavigator.prototype.examineChunk = function(buffer, bytesRead, isEof) {166 var lines = 0;167 var length = 0;168 169 do {170 var position = LineNavigator.prototype.getLineEnd(buffer, length, bytesRead, isEof);171 if (position !== undefined) {172 lines++;173 length = position + 1;174 }175 } while (position !== undefined);176 if (isEof) {177 lines++;178 length = bytesRead;179 }180 return length > 0 181 ? { lines: lines, length: length - 1 } 182 : undefined;183 }; 184 var bomUtf8 = [239, 187, 191];185 var bomUtf16le = [255, 254];186 var arrayStartsWith = function (array, startsWith) {187 for (var i = 0; i < array.length && i < startsWith.length; i++) {188 if (array[i] !== startsWith[i])189 return false;190 if (i == startsWith.length - 1) 191 return true;192 }193 return false;194 };195 LineNavigator.prototype.getBomOffset = function(buffer, encoding) {196 switch (encoding.toLowerCase()) {197 case 'utf8':198 return arrayStartsWith(buffer, bomUtf8) ? bomUtf8.length : 0;199 case 'utf16le':200 return arrayStartsWith(buffer, bomUtf16le) ? bomUtf16le.length : 0;201 default:202 return 0;203 }204 }205 return LineNavigator; 206};207// Node.js208if (typeof module !== 'undefined' && module.exports) {209 FileWrapper = require('./file-wrapper.js');210 module.exports = getLineNavigatorClass();211}212// AMD213else if (typeof define === 'function') {214 define(['./file-wrapper'], function(fileWrapper){215 FileWrapper = fileWrapper;216 return getLineNavigatorClass(); 217 });218}219// Vanilla220else {221 if (typeof FileWrapper === 'undefined') {222 throw "For vanilla JS please add 'file-wrapper.js' script tag before this one."223 }224 LineNavigator = getLineNavigatorClass();...

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StreamParser.js

Source:StreamParser.js Github

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1export function parse(buffer, generatorFunction) {2 return (new StreamParser(generatorFunction)).addFinalChunk(buffer);3}4export class StreamParser {5 constructor(generatorFunction) {6 this._chunkConsumer = makeChunkConsumer(generatorFunction);7 this._chunkConsumer.next();8 this.done = false;9 this.result = null;10 }11 addChunk(buffer) {12 if (! Buffer.isBuffer(buffer)) {13 throw new Error("Chunk must be a Buffer in StreamParser");14 }15 if (this.done) {16 return this.result;17 } else {18 const {value, done} = this._chunkConsumer.next(buffer);19 if (done) {20 this.done = true;21 this.result = value;22 return this.result;23 } else {24 return null;25 }26 }27 }28 addEOF() {29 if (this.done) {30 return this.result;31 } else {32 const result = this._chunkConsumer.next('EOF').value;33 this.result = result;34 this.done = true;35 return result;36 }37 }38 addFinalChunk(buffer) {39 this.addChunk(buffer);40 return this.addEOF();41 }42}43// An extractor is a function that takes:44//45// * `chunks` - non-empty array of non-empty Buffers46// * `c` - index into `chunks`47// * `offset` - byte index into `chunks[c]`48// * `available` - total number of available bytes,49// including remaining bytes in `chunks[c]` starting at `offset`,50// and bytes in subsequent chunks51// * `isEOF` - true/false; true if there are no more chunks.52// note that there still may be bytes available.53// most extractors can ignore this argument and simply return `null`54// if the bytes they need aren't available, and then an appropriate55// error will be thrown automatically.56//57// An extractor returns one of the following:58// * `null` - the extractor will be called again when more bytes are available59// * `{result: any, totalBytesConsumed: int}` - the extractor returns a result60// and consumes some number of bytes, which may be 0, or may span multiple61// chunks.62//63// When an extractor is called:64// * Either `available > 0` or `available === 0` and we are at EOF.65// (Returning `null` at EOF will cause an "Unexpected EOF" error, which66// is presumably what you want in this case.)67// * `chunks[c]` exists and `offset < chunks[c].length`68//69// When an extractor is called multiple times as a result of returning `null`,70// the `c` and `offset` arguments will be the same each time. The `available`71// argument will be a greater number each time, and the `chunks` array will72// contain the same chunks plus at least one new chunk each time -- unless73// isEOF is newly set to true.74export const extractors = {75 EOF: (chunks, c, offset, available, isEOF) => {76 return { result: (available === 0),77 totalBytesConsumed: 0 };78 },79 byte: (chunks, c, offset, available) => {80 if (available < 1) {81 return null;82 }83 return { result: chunks[c].readUInt8(offset),84 totalBytesConsumed: 1 };85 },86 bytes(n) {87 if (! (n >= 1)) {88 throw new Error("Positive number of bytes required");89 }90 return (chunks, c, offset, available) => {91 if (available < n) {92 // call us back when there are more bytes available93 return null;94 } else {95 const curChunk = chunks[c];96 const curChunkAvailable = curChunk.length - offset;97 if (curChunkAvailable >= n) {98 // bytes are available in the current chunk99 return { result: curChunk.slice(offset, offset+n),100 totalBytesConsumed: n };101 } else {102 if (c === (chunks.length - 1)) {103 throw new Error("assertion fail: more bytes should be available");104 }105 // bytes are at a chunk boundary; allocate new Buffer106 const result = new Buffer(n);107 // copy the rest of this chunk into the buffer108 let bytesNeeded = n - curChunkAvailable; // > 0109 curChunk.copy(result, 0, offset, curChunk.length);110 // copy data from more chunks111 let j = c+1;112 while (bytesNeeded > 0 && j < chunks.length) {113 const newChunk = chunks[j];114 const bytesToTake = Math.min(newChunk.length, bytesNeeded);115 newChunk.copy(result, n-bytesNeeded, 0, bytesToTake);116 bytesNeeded -= bytesToTake;117 j++;118 }119 if (bytesNeeded) {120 throw new Error("assertion fail: more bytes should be available");121 }122 return { result: result, totalBytesConsumed: n };123 }124 }125 };126 }127};128const bytes4 = extractors.bytes(4);129Object.assign(extractors, {130 uint32: (chunks, c, offset, available) => {131 if (available < 4) {132 return null;133 } else if (chunks[c].length - offset >= 4) {134 // fast path for performance; bytes are in same chunk135 return { result: chunks[c].readUInt32BE(offset),136 totalBytesConsumed: 4 };137 } else {138 // bytes are split across chunks139 const ret = bytes4(chunks, c, offset, available);140 ret.result = ret.result.readUInt32BE(0);141 return ret;142 }143 }144});145export class TestParser extends StreamParser {146 constructor() {147 super(function* () {148 const {byte, uint32} = extractors;149 return [(yield uint32).toString(16),150 (yield byte).toString(16),151 (yield uint32).toString(16)];152 });153 }154}155// Pass in Buffer chunks, or the string 'EOF' to indicate EOF.156function* makeChunkConsumer(parser) {157 const chunks = []; // Buffers of non-zero length158 let available = 0;159 let c = 0; // which chunk we're on160 let offset = 0; // current offset into `chunks[c]`161 let isEOF = false;162 let totalPastChunksLength = 0;163 function receiveChunk(newChunk) {164 if (newChunk === 'EOF') {165 isEOF = true;166 } else if (newChunk.length) {167 chunks.push(newChunk);168 available += newChunk.length;169 }170 }171 const generator = parser();172 let info = generator.next();173 while (! info.done) {174 const extractor = info.value;175 // make sure we have at least one byte available,176 // which means we have at least one chunk, and a byte177 // to point to in that chunk, when we invoke an extractor.178 // At this point, isEOF is false.179 while (available === 0 && !isEOF) {180 receiveChunk((yield));181 }182 // Invariants (if not isEOF):183 // - `available > 0`184 // - `chunks[c]` exists and `offset < chunks[c].length`.185 //186 // If and only if isEOF, `available === 0`.187 let result, bytesConsumed;188 if (available && extractor === extractors.byte) {189 // this case is purely a performance optimization, to avoid an190 // extra function call and object allocation.191 result = chunks[c].readUInt8(offset);192 bytesConsumed = 1;193 } else if (extractor === 'offset') {194 result = totalPastChunksLength + offset;195 bytesConsumed = 0;196 } else {197 let extracted = extractor(chunks, c, offset, available, isEOF);198 while (!extracted && !isEOF) {199 const oldAvailable = available;200 while (available === oldAvailable && !isEOF) {201 receiveChunk((yield));202 }203 extracted = extractor(chunks, c, offset, available, isEOF);204 }205 if (!extracted) {206 generator.throw(new Error("Unexpected EOF"));207 }208 result = extracted.result;209 bytesConsumed = extracted.totalBytesConsumed;210 if (typeof bytesConsumed !== 'number') {211 throw new Error("extractor must return totalBytesConsumed");212 }213 if (bytesConsumed > available) {214 throw new Error("Parser tried to consume more bytes than available");215 }216 }217 available -= bytesConsumed;218 offset += bytesConsumed;219 while (c < chunks.length && offset >= chunks[c].length) {220 offset -= chunks[c].length;221 totalPastChunksLength += chunks[c].length;222 c++;223 }224 // Invariant: Either `offset < chunks[c].length`, meaning there225 // is another byte in the current chunk ready to be read, or we are226 // out of bytes but ready for the next chunk when it arrives, i.e.227 // `c === chunks.length` and `offset === 0` and `available === 0`.228 info = generator.next(result);229 }230 return info.value;...

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Sexpr.js

Source:Sexpr.js Github

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...6 this.column = 0;7 }89 // Check if we reached the end of the file10 isEOF() {11 return this.index >= this.string.length;12 }1314 // Peek at the next char15 peek() {16 return this.string[this.index];17 }1819 // Peek at a specified char20 peekOffset(offset) {21 return this.string[this.index + offset];22 }2324 // Read & consume the next char25 pop() {26 const char = this.string[this.index++];27 if (char == "\n") {28 this.line++;29 this.column = 0;30 } else {31 this.column++;32 }33 return char;34 }3536 pos() {37 return { line: this.line, column: this.column };38 }39};4041// Check if a char is a digit42function isDigit(char) {43 return char >= "0" && char <= "9";44}4546// Check if a char is an alphabet character47function isAlpha(char) {48 return (char >= "a" && char <= "z") || (char >= "A" && char <= "Z");49}5051// Lex a comment52function comment(lexer) {53 if (!lexer.isEOF() && lexer.peek() == ";") {54 lexer.pop();55 while (!lexer.isEOF()) {56 const char = lexer.pop();57 if (char === '\n') break;58 }59 return true;60 }61 return false;62}6364// Lex a number65function num(lexer) {66 let num = 0;67 let digitsCount = 0;68 let negate = false;69 if (!lexer.isEOF() && lexer.peek() == "-" && isDigit(lexer.peekOffset(1))) {70 negate = true;71 lexer.pop();72 }73 while (!lexer.isEOF() && isDigit(lexer.peek())) {74 digitsCount++;75 num *= 10;76 num += parseInt(lexer.pop());77 }78 if (digitsCount === 0) {79 // Didn't find any digits80 return false;81 } else {82 // Found digits, so return the number83 return negate ? -num : num;84 }85}8687// Lex a string88function string(lexer) {89 let contents = "";90 if (lexer.isEOF() || lexer.peek() !== '"') {91 return false;92 }93 lexer.pop();94 while (!lexer.isEOF()) {95 const char = lexer.pop();96 if (char === '"') return contents;97 else contents += char;98 }99 return false;100}101102// Lex an open paren103function openParen(lexer) {104 if (!lexer.isEOF() && lexer.peek() == "(") {105 lexer.pop();106 return "(";107 } else {108 return false;109 }110}111112// Lex a close paren113function closeParen(lexer) {114 if (!lexer.isEOF() && lexer.peek() == ")") {115 lexer.pop();116 return ")";117 } else {118 return false;119 }120}121122// Lex white space123function whiteSpace(lexer) {124 const whiteSpaceChars = [" ", "\t", "\r", "\n"];125 while (!lexer.isEOF()) {126 if (whiteSpaceChars.includes(lexer.peek())) lexer.pop();127 else if (comment(lexer)) continue;128 else break;129 }130 return false;131}132133// Lex an identifier134function ident(lexer) {135 const validOperators = [136 "+",137 "-",138 "*",139 "/",140 "%",141 "?",142 "=",143 "&",144 "|",145 "@",146 "!",147 "~",148 "_"149 ];150 if (lexer.isEOF()) {151 return false;152 }153 const firstChar = lexer.pop();154 let buffer = "";155 if (isAlpha(firstChar) || validOperators.includes(firstChar)) {156 buffer += firstChar;157 }158 while (!lexer.isEOF()) {159 const char = lexer.peek();160 if (isAlpha(char) || isDigit(char) || validOperators.includes(char)) {161 buffer += lexer.pop();162 } else {163 break;164 }165 }166 return buffer;167}168169// Construct a token as the position + item170function token(pos, item) {171 return { pos: pos, token: item };172}173174// Lex an entire program175function lexProgram(text) {176 let buffer = [];177 let lexer = new Lexer(text);178 while (!lexer.isEOF()) {179 whiteSpace(lexer);180 let startPos = lexer.pos();181182 const isOpenParen = openParen(lexer);183 if (isOpenParen !== false) {184 buffer.push(token(startPos, isOpenParen));185 continue;186 }187188 const isCloseParen = closeParen(lexer);189 if (isCloseParen !== false) {190 buffer.push(token(startPos, isCloseParen));191 continue;192 }193194 const isString = string(lexer);195 if (isString !== false) {196 buffer.push(token(startPos, isString));197 continue;198 }199200 const isNum = num(lexer);201 if (isNum !== false) {202 buffer.push(token(startPos, isNum));203 continue;204 }205206 const isIdent = ident(lexer);207 if (isIdent !== false) {208 buffer.push(token(startPos, { id: isIdent }));209 continue;210 }211212 // Didn't find a match, so let's throw an error213 const line = startPos["line"];214 const col = startPos["column"];215 const found = lexer.peek();216 throw `Unexpected character at line ${line}, column ${col}: '${found}'`;217 }218219 return buffer;220}221222class Parser {223 constructor(tokenStream) {224 this.tokenStream = tokenStream;225 this.index = 0;226 }227228 // Check if we reached the end of the file229 isEOF() {230 return this.index >= this.tokenStream.length;231 }232233 // Peek at the next token234 peek() {235 return this.tokenStream[this.index]["token"];236 }237238 // Fetch & consume the next token239 pop() {240 return this.tokenStream[this.index++]["token"];241 }242243 // Get the current position of the parser244 pos() {245 return this.tokenStream[this.index]["pos"];246 }247}248249function parseExpr(parser) {250 let buffer = [];251 while (!parser.isEOF()) {252 if (parser.peek() === ")") {253 parser.pop();254 return buffer;255 } else if (parser.peek() === "(") {256 parser.pop();257 buffer.push(parseExpr(parser));258 } else {259 buffer.push(parser.pop());260 }261 }262 const line = parser.pos()["line"];263 const col = parser.pos()["column"];264 throw `Expected ')' but found end of file at line ${line}, column ${col}`;265}266267function parseProgram(tokenStream) {268 let parser = new Parser(tokenStream);269 let result = null;270 if (!parser.isEOF() && parser.peek() == "(") {271 parser.pop();272 result = parseExpr(parser);273 } else if (!parser.isEOF() && parser.peek() != ")") {274 result = parser.pop();275 }276277 if (!parser.isEOF()) {278 const found = parser.peek();279 const line = parser.pos()["line"];280 const col = parser.pos()["column"];281 throw `Expected end of file but found '${found}' at line ${line}, column ${col}`;282 } else {283 return result;284 }285}286287export function readSexpr(string) {288 return parseProgram(lexProgram(string));289}290291export function formatSexpr(sexpr) { ...

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parser.js

Source:parser.js Github

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1/**2 * Simple parser for tokenizing strings.3 *4 * Sample:5 *6 * ```7 * const parser = Parser('10 myinput,');8 *9 * console.log(parser.nextInt()); // Prints 1010 * console.log(parser.nextIdent()); // Prints myinput11 * console.log(parser.next()); // Prints ','12 * ```13 *14 * If `.next` or `.peek` methods fail to parse, an error is thrown.15 */16class Parser {17 /**18 *19 * @param {String} input Input to be parsed.20 * @param {Boolean} autoskipWhitespace Whether to automatically skip whitespaces21 * when parsing input. Defaults to `true`.22 */23 constructor (input, autoskipWhitespace = true) {24 this.input = input;25 this.index = 0;26 this.autoskipWhitespace = autoskipWhitespace;27 }2829 /**30 * Returns the current character without advancing the reading index.31 *32 * @returns {string} The current character in the input.33 * @throws If at end of input (i.e. `this.isEoF() == true`).34 */35 peek () {36 this.throwIfEoF();37 return this.input[this.index];38 }3940 /**41 * Returns the current character, and advances the reading index to the next42 * character of the input.43 *44 * @returns {string} The current character in the input.45 * @throws If at end of input (i.e. `this.isEoF() == true`).46 */47 next () {48 this.throwIfEoF();49 return this.input[this.index++];50 }5152 /**53 * @returns {number} The integer, parsed as a number.54 * @throws If at end of input (i.e. `this.isEoF() == true`).55 * @throws If the next char is not a digit.56 */57 nextInt () {58 if (this.autoskipWhitespace) {59 this.skipWhitespace();60 }6162 if (!this.isDigit(this.peek())) {63 throw Error('Expected digit at index ', this.index);64 }6566 var result = this.getStringAfterSkipping(() => {67 this.next(); // We already now this is a digit because of the `if` above6869 while (!this.isEoF() && this.isDigit(this.peek())) {70 this.next();71 }72 });7374 return Number.parseInt(result);75 }7677 /**78 * @returns {number} The float, parsed as a number.79 * @throws If at end of input (i.e. `this.isEoF() == true`).80 * @throws If the next char is not a digit, or the regex fails the match /\d+(\.\d+)?/81 */82 nextFloat () {83 const match = this.nextRegex(/\d+(\.\d+)?/);8485 return Number.parseFloat(match);86 }8788 /**89 * Parses an identifier. An identifier is any collection of non-whitespace90 * characters, up until the first whitespace char.91 * @returns {string} Parsed string up until first whitespace.92 * @throws If at end of input (i.e. `this.isEoF() == true`).93 */94 nextIdent () {95 if (this.autoskipWhitespace) {96 this.skipWhitespace();97 }9899 this.throwIfEoF();100101 return this.getStringAfterSkipping(() => {102 while (!this.isEoF() && !this.isWhitespace(this.peek())) {103 this.next();104 }105 });106 }107108 /**109 * Verifies the next identifier passed a given checking closure.110 * The closure receives in the next identifier string and returns true/false,111 * and the method throws if the return is `false`, with a given error message.112 * @param {(String) => Boolean} matching113 * @param {string} errorMessage114 * @returns {String} The identifier that was matches115 */116 validateNextIdent (matching, errorMessage = null) {117 const ident = this.nextIdent();118 if (!matching(ident)) {119 throw Error(errorMessage);120 }121122 return ident;123 }124125 /**126 * Matches a given regex from the current point in the string.127 * If the regex doesn't match, or the first match is not exactly at index `this.index`,128 * an error is thrown.129 * @param {string} regex130 * @returns {RegExpExecArray} The resulting match array.131 */132 nextRegex (regex) {133 if (this.autoskipWhitespace) {134 this.skipWhitespace();135 }136137 const matches = RegExp(regex).exec(this.input.substr(this.index));138139 if (matches.length === 0 || matches.index !== 0) {140 throw Error('Failed to match ' + regex + ' against remaining input.');141 }142143 this.index += matches[0].length;144145 return matches;146 }147148 /**149 * Collects all the remaining string from the current point in the input.150 * After this call, any further attempt to call a parsing method will result151 * in an EoF error.152 * @returns {String}153 */154 remaining () {155 const rem = this.input.substr(this.index);156157 this.index = this.input.length;158159 return rem;160 }161162 /**163 * Skips all whitespace characters until a non-whitespace char is hit, or end-of-file164 * is reached.165 */166 skipWhitespace () {167 while (!this.isEoF() && this.isWhitespace(this.peek())) {168 this.next();169 }170 }171172 /**173 * Returns whether char is a whitespace character.174 * Whitespace chars recognized: \s, \t, \r, \n.175 * @param {string} char176 */177 isWhitespace (char) {178 return char === ' ' || char === '\t' || char === '\r' || char === '\n';179 }180181 /**182 * Returns whether char is one of the 10 numerical digits.183 * @param {string} char184 */185 isDigit (char) {186 const code = char.charCodeAt(0);187 return code >= 48 /* = '0' */ && code <= 57;188 }189190 /**191 * Returns whether char is one of the 26 alphabetical letters, lowercase and192 * uppercase.193 * @param {string} char194 */195 isLetter (char) {196 const code = char.charCodeAt(0);197 return (code >= 97 /* = 'a' */ && code <= 122 /* = 'z' */) ||198 (code >= 65 /* = 'A' */ && code <= 90 /* = 'Z' */);199 }200201 /**202 * Returns whether char is either a letter or a digit.203 * @param {string} char204 */205 isAlpha (char) {206 return this.isLetter(char) || this.isDigit(char);207 }208209 /**210 * Whether the index to read points to the end of the string, that is, no more211 * string can be parsed.212 *213 * `EoF` comes from 'end-of-file' and is the common term used in programming214 * when a reading index points to the end of the readable region.215 *216 * @returns {bool} Returns if `this.index >= this.input.length`. Used to check217 * if the parser is at the end of the input.218 */219 isEoF () {220 return this.index >= this.input.length;221 }222223 /**224 * Helper method for checking end of input and throwing automatically.225 *226 * @throws If `this.isEoF() == true`.227 */228 throwIfEoF () {229 if (this.isEoF()) {230 throw Error('Unexpected end of input.');231 }232 }233234 /**235 * Used to return a string that starts at the current index, and ends at the236 * index after the closure finishes executing. Used to aid in collecting strings237 * without having to deal w/ locals.238 * @param {() => void} closure239 */240 getStringAfterSkipping (closure) {241 const startIndex = this.index;242 closure();243244 return this.input.substring(startIndex, this.index);245 }246}247 ...

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message.test.js

Source:message.test.js Github

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...24 describe('#isEOF', () => {25 it('should be return true it message was "STORED"', () => {26 const reply = Buffer.from('STORED\r\n', 'utf8');27 // eslint-disable-next-line no-unused-expressions28 expect(Message.isEOF(reply)).to.be.true;29 });30 it('should be return true it message was "ERROR"', () => {31 const reply = Buffer.from('ERROR\r\n', 'utf8');32 // eslint-disable-next-line no-unused-expressions33 expect(Message.isEOF(reply)).to.be.true;34 });35 it('should be return true it message was "SERVER_ERROR"', () => {36 const reply = Buffer.from('SERVER_ERROR\r\n', 'utf8');37 // eslint-disable-next-line no-unused-expressions38 expect(Message.isEOF(reply)).to.be.true;39 });40 it('should be return true it message was "CLIENT_ERROR"', () => {41 const reply = Buffer.from('CLIENT_ERROR\r\n', 'utf8');42 // eslint-disable-next-line no-unused-expressions43 expect(Message.isEOF(reply)).to.be.true;44 });45 it('should be return true it message was "EXISTS"', () => {46 const reply = Buffer.from('EXISTS\r\n', 'utf8');47 // eslint-disable-next-line no-unused-expressions48 expect(Message.isEOF(reply)).to.be.true;49 });50 it('should be return true it message was "TOUCHED"', () => {51 const reply = Buffer.from('TOUCHED\r\n', 'utf8');52 // eslint-disable-next-line no-unused-expressions53 expect(Message.isEOF(reply)).to.be.true;54 });55 it('should be return true it message was "DELETED"', () => {56 const reply = Buffer.from('DELETED\r\n', 'utf8');57 // eslint-disable-next-line no-unused-expressions58 expect(Message.isEOF(reply)).to.be.true;59 });60 it('should be return true it message was "END"', () => {61 const reply = Buffer.from('END\r\n', 'utf8');62 // eslint-disable-next-line no-unused-expressions63 expect(Message.isEOF(reply)).to.be.true;64 });65 it('should be return false it message was value messages', () => {66 const reply = Buffer.from('VALUE foo 0 3 100\r\n', 'utf8');67 // eslint-disable-next-line no-unused-expressions68 expect(Message.isEOF(reply)).to.be.false;69 });70 });71 describe('#code', () => {72 beforeEach(() => {73 m.append(Buffer.from('STORED\r\n', 'utf8'));74 m.freeze();75 });76 it('should return trimmed code string', () => {77 expect(m.code).to.equal('STORED');78 });79 });80 describe('#rawData', () => {81 beforeEach(() => {82 m.append(Buffer.from('VALUE foo 0 3 100\r\nbar\r\nEND\r\n', 'utf8'));...

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driftbox.js

Source:driftbox.js Github

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1// Driftbox ログリーダ2LogReaderInfo.push({3 Caption: "Driftbox (*.dbn)",4 Filter: "*.dbn",5 ReaderFunc: "Read_dbn"6});7// dbn フォーマット (ほとんど [HEADER] に書いてある)8// 1レコード: 33バイト big endian9// '$'10// SATS(1)11// TIME(3) GMT 0:00 からの経過時間 1秒=100 日付は失われている(?)12// LATITUDE(4) 1度 = 600000013// LONGITUDE(4)14// VELOCITY(2) 1km/h = 10015// HEADING(2) 1度 = 10016// HEIGHT(4)17// YAW__(2) 以下なんの値か不明18// YAW_(2)19// YAW(2)20// SLIP(2)21// CHKSUM(2)22// 0x0D 0x0A23function Read_dbn( Files ){24 25 Log.Time = [];26 Log.Speed = [];27 Log.Longitude = [];28 Log.Latitude = [];29 30 var Cnt = 0;31 var Line;32 33 for( var i = 0; i < Files.length; ++i ){34 var file = new File();35 try{36 file.Open( Files[ i ], "rb" );37 }catch( e ){38 MessageBox( "ファイルが開けません: " + Files[ i ] );39 return 0;40 }41 42 // [HEADER] までスキップ43 while( !file.IsEOF()){44 if( file.ReadLine().match( /^\[HEADER\]/ )) break;45 }46 47 var ParamName = [];48 var ParamSize = [];49 50 // ヘッダ解析51 while( !file.IsEOF()){52 Line = file.ReadLine();53 if( Line.match( /^(.+)\((\d+)\)/ )){54 ParamName.push( RegExp.$1 );55 ParamSize.push( ~~RegExp.$2 );56 }else{57 break;58 }59 }60 if( file.IsEOF()) return INVALID_FORMAT;61 62 // [DATA] までスキップ63 if( !Line.match( /^\[DATA\]/ )){64 while( !file.IsEOF()){65 if( file.ReadLine().match( /^\[DATA\]/ )) break;66 }67 }68 if( file.IsEOF()) return INVALID_FORMAT;69 70 var PrevTime = 0;71 72 // 日付情報が無いので暫定的に 2012/1/173 var Time0 = Date.UTC( 2012, 0, 1, 0, 0, 0 );74 75 while( 1 ){76 file.Seek( 1, SEEK_CUR ); // '$' のスキップ77 78 for( var j = 0; j < ParamName.length; ++j ){79 var Val;80 81 switch( ParamSize[ j ] ){82 case 1: Val = file.ReadUChar(); break;83 case 2: Val = file.ReadUShortB(); break;84 case 3: Val = file.ReadUShortB() * 256 + file.ReadUChar(); break;85 default:Val = file.ReadIntB();86 }87 88 switch( ParamName[ j ] ){89 case "TIME": Time = Val * 10; break;90 case "LATITUDE": Log.Latitude [ Cnt ] = Val / 6000000; break;91 case "LONGITUDE": Log.Longitude[ Cnt ] = Val / 6000000; break;92 case "VELOCITY": Log.Speed [ Cnt ] = Val / 100;93 }94 }95 96 if( file.IsEOF()) break;97 98 if( Time < PrevTime ){99 Time0 += 24 * 3600 * 1000;100 }101 PrevTime = Time;102 Log.Time[ Cnt ] = Time + Time0;103 104 ++Cnt;105 106 // 0D 0A をスキップ107 file.Seek( 2, SEEK_CUR );108 }109 file.Close();110 }111 112 return Cnt;...

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Scanner.js

Source:Scanner.js Github

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...17 {18 return this._tokens$1.shift();19 }20 this.skipWhites();21 if (this.isEOF())22 {23 return new lsystem.parser.Token("eof", null);24 }25 var c/*:String*/ = this._source$1.charAt(this._pos$1++);26 var buf/*:String*/ = "";27 var code/*:int*/ = c.charCodeAt(0);28 if (this.isAlpha(code) || (c == '_'))29 {30 /*while (isAlpha(code) || (c == '_'))31 {32 buf += c;33 if (isEOF())34 {35 ++_pos;36 break;37 }38 c = _source.charAt(_pos++);39 code = c.charCodeAt(0);40 }41 --_pos;*/42 buf += c;43 return new lsystem.parser.Token("name", buf);44 }45 else if (c == "\n")46 {47 return new lsystem.parser.Token("eol", null);48 }49 else if (c == "-")50 {51 buf = c;52 while (!this.isEOF())53 {54 c = this._source$1.charAt(this._pos$1);55 if (c != '>')56 {57 break;58 }59 buf += c;60 this._pos$1++;61 }62 return new lsystem.parser.Token("operator", buf);63 }64 else65 {66 return new lsystem.parser.Token("operator", c);67 }68 },69 "public function pushBack",function pushBack(token/*:Token*/)/*:void*/70 {71 this._tokens$1.push(token);72 },73 "protected function isAlpha",function isAlpha(c/*:int*/)/*:Boolean*/74 {75 return ((c >= 97) && (c <= 122)) || ((c >= 65) && (c <= 90));76 },77 "protected function isEOF",function isEOF()/*:Boolean*/78 {79 return (this._pos$1 >= this._source$1.length);80 },81 "protected function skipWhites",function skipWhites()/*:void*/82 {83 while (!this.isEOF())84 {85 var c/*:String*/ = this._source$1.charAt(this._pos$1++);86 if ((c != " ") && (c != "\t"))87 {88 --this._pos$1;89 break;90 }91 }92 },93 ];},[],["Array","lsystem.parser.Token"], "0.8.0", "0.9.6"...

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reader.spec.js

Source:reader.spec.js Github

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1import createReader from "./reader";23test("Should correctly read input string", () => {4 const reader = createReader("hello");56 expect(reader.currentChar()).toBe("h");7 expect(reader.isEof()).toBeFalsy();8 reader.nextChar();9 expect(reader.currentChar()).toBe("e");10 expect(reader.isEof()).toBeFalsy();11 reader.nextChar();12 expect(reader.currentChar()).toBe("l");13 expect(reader.isEof()).toBeFalsy();14 reader.nextChar();15 expect(reader.currentChar()).toBe("l");16 expect(reader.isEof()).toBeFalsy();17 reader.nextChar();18 expect(reader.currentChar()).toBe("o");19 expect(reader.isEof()).toBeFalsy();20 reader.nextChar();21 expect(reader.isEof()).toBeTruthy(); ...

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Using AI Code Generation

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1var wpt = require('webpagetest');2var wpt = new WebPageTest('www.webpagetest.org');3 if (err) return console.log(err);4 console.log(data);5 wpt.isEOF(data.data.testId, function(err, data) {6 if (err) return console.log(err);7 console.log(data);8 });9});10{ statusCode: 200,11 { testId: '150722_5R_1',12{ statusCode: 200,13 { statusCode: 200,

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Using AI Code Generation

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1var WshShell = WScript.CreateObject("WScript.Shell");2var fso = new ActiveXObject("Scripting.FileSystemObject");3var file = fso.OpenTextFile("test.txt", 1, true);4while (!file.AtEndOfStream)5{6 WScript.Echo(file.ReadLine());7}8file.Close();9var WshShell = WScript.CreateObject("WScript.Shell");10var fso = new ActiveXObject("Scripting.FileSystemObject");11var file = fso.OpenTextFile("test.txt", 1, true);12var allText = file.ReadAll();13WScript.Echo(allText);14file.Close();15var WshShell = WScript.CreateObject("WScript.Shell");16var fso = new ActiveXObject("Scripting.FileSystemObject");17var file = fso.OpenTextFile("test.txt", 1, true);18var line = file.Read(5);19WScript.Echo(line);20file.Close();21var WshShell = WScript.CreateObject("WScript.Shell");22var fso = new ActiveXObject("Scripting.FileSystemObject");23var file = fso.OpenTextFile("test.txt", 1, true);24file.Skip(5);25var line = file.ReadLine();26WScript.Echo(line);27file.Close();28var WshShell = WScript.CreateObject("WScript.Shell");29var fso = new ActiveXObject("Scripting.FileSystemObject");30var file = fso.OpenTextFile("test.txt", 1, true);31file.SkipLine();32var line = file.ReadLine();33WScript.Echo(line);34file.Close();35var WshShell = WScript.CreateObject("WScript.Shell");

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Using AI Code Generation

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1var wptf = new ActiveXObject("Scripting.FileSystemObject");2var f = wptf.OpenTextFile("test.txt", 1);3while (!f.AtEndOfStream) {4 var line = f.ReadLine();5 WScript.Echo(line);6}7f.close();8var wptf = new ActiveXObject("Scripting.FileSystemObject");9var f = wptf.OpenTextFile("test.txt", 2, true);10f.Write("Hello World!");11f.close();12var wptf = new ActiveXObject("Scripting.FileSystemObject");13var f = wptf.OpenTextFile("test.txt", 2, true);14f.WriteLine("Hello World!");15f.close();16var wptf = new ActiveXObject("Scripting.FileSystemObject");17var f = wptf.OpenTextFile("test.txt", 1);18var content = f.ReadAll();19WScript.Echo(content);20f.close();21var wptf = new ActiveXObject("Scripting.FileSystemObject");22var f = wptf.OpenTextFile("test.txt", 2, true);23f.WriteAll("Hello World!");24f.close();25var wptf = new ActiveXObject("Scripting.FileSystemObject");

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Using AI Code Generation

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1var wpt = require('wpt');2var wpt = new wpt('API_KEY');3wpt.isEOF(function(err, data){4 if(err){5 console.log(err);6 }else{7 console.log(data);8 }9});10var wpt = require('wpt');11var wpt = new wpt('API_KEY');12wpt.getLocations(function(err, data){13 if(err){14 console.log(err);15 }else{16 console.log(data);17 }18});19var wpt = require('wpt');20var wpt = new wpt('API_KEY');21wpt.getTesters(function(err, data){22 if(err){23 console.log(err);24 }else{25 console.log(data);26 }27});28var wpt = require('wpt');29var wpt = new wpt('API_KEY');30wpt.getTesters(function(err, data){31 if(err){32 console.log(err);33 }else{34 console.log(data);35 }36});37var wpt = require('wpt');38var wpt = new wpt('API_KEY');39wpt.getTesters(function(err, data){40 if(err){41 console.log(err);42 }else{43 console.log(data);44 }45});46var wpt = require('wpt');47var wpt = new wpt('API_KEY');48wpt.getTesters(function(err, data){49 if(err){50 console.log(err);51 }else{52 console.log(data);53 }54});55var wpt = require('wpt');56var wpt = new wpt('API_KEY');57wpt.getTesters(function(err, data){58 if(err){59 console.log(err);60 }else{61 console.log(data);62 }63});64var wpt = require('wpt');

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Using AI Code Generation

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1var obj = new ActiveXObject("Scripting.FileSystemObject");2var file = obj.OpenTextFile("test.txt", 1, true);3WScript.Echo(file.AtEndOfStream);4file.Close();5WScript.Echo(WScript.StdIn.AtEndOfStream);6WScript.Echo(WScript.StdOut.AtEndOfStream);7WScript.Echo(WScript.StdErr.AtEndOfStream);8var line = "";9while(!WScript.StdIn.AtEndOfStream)10{11 line = WScript.StdIn.ReadLine();12 WScript.Echo(line);13}14var line = "";15while(!WScript.StdOut.AtEndOfStream)16{17 line = WScript.StdOut.WriteLine("Hello");18}19var line = "";20while(!WScript.StdErr.AtEndOfStream)21{22 line = WScript.StdErr.WriteLine("Hello");23}

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Using AI Code Generation

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1if(wpt.isEOF())2{3}4if(wpt.isEOF())5{6}7var str = wpt.readLine();8while(!wpt.isEOF())9{10 str = wpt.readLine();11}12var str = wpt.readLine();13while(!wpt.isEOF())14{15 str = wpt.readLine();16}

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Using AI Code Generation

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1wpt.isEOF(function (err, result) {2 if (err) {3 console.log("Error: " + err);4 } else {5 console.log("Result: " + result);6 }7});8wpt.isEOF(function (err, result) {9 if (err) {10 console.log("Error: " + err);11 } else {12 console.log("Result: " + result);13 }14});15wpt.isEOF(function (err, result) {16 if (err) {17 console.log("Error: " + err);18 } else {19 console.log("Result: " + result);20 }21});22wpt.isEOF(function (err, result) {23 if (err) {24 console.log("Error: " + err);25 } else {26 console.log("Result: " + result);27 }28});29wpt.isEOF(function (err, result) {30 if (err) {31 console.log("Error: " + err);32 } else {33 console.log("Result: " + result);34 }35});36wpt.isEOF(function (err, result) {37 if (err) {38 console.log("Error: " + err);39 } else {40 console.log("Result: " + result);41 }42});43wpt.isEOF(function (err, result) {44 if (err) {45 console.log("Error: " + err);46 } else {47 console.log("Result: " + result);48 }49});50wpt.isEOF(function (err, result) {51 if (err) {52 console.log("Error: " + err);

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