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How to use isEOF method in wpt

Best JavaScript code snippet using wpt

line-navigator.js

Source:line-navigator.js

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();...

StreamParser.js

Source:StreamParser.js

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;...

Sexpr.js

Source:Sexpr.js

...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) {
...

parser.js

Source:parser.js

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
...

message.test.js

Source:message.test.js

...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'));...

driftbox.js

Source:driftbox.js

1// Driftbox ãã°ãªã¼ã2LogReaderInfo.push({3	Caption:	"Driftbox (*.dbn)",4	Filter:		"*.dbn",5	ReaderFunc:	"Read_dbn"6});7// dbn ãã©ã¼ããã (ã»ã¨ãã© [HEADER] ã«æ¸ãã¦ãã)8// 1ã¬ã³ã¼ã: 33ãã¤ã  big endian9// '$'10// SATS(1)11// TIME(3)		GMT 0:00 ããã®çµéæé 1ç§=100 æ¥ä»ã¯å¤±ããã¦ãã(?)12// LATITUDE(4)	1åº¦ = 600000013// LONGITUDE(4)14// VELOCITY(2)	1km/h = 10015// HEADING(2)	1åº¦ = 10016// HEIGHT(4)17// YAW__(2)		ä»¥ä¸ãªãã®å¤ãä¸æ18// 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( "ãã¡ã¤ã«ãéãã¾ãã: " + Files[ i ] );39			return 0;40		}41		42		// [HEADER] ã¾ã§ã¹ããã43		while( !file.IsEOF()){44			if( file.ReadLine().match( /^\[HEADER\]/ )) break;45		}46		47		var ParamName = [];48		var ParamSize = [];49		50		// ãããè§£æ51		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] ã¾ã§ã¹ããã63		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		// æ¥ä»æå ±ãç¡ãã®ã§æ«å®çã« 2012/1/173		var Time0 = Date.UTC( 2012, 0, 1, 0, 0, 0 );74		75		while( 1 ){76			file.Seek( 1, SEEK_CUR );	// '$' ã®ã¹ããã77			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 ãã¹ããã107			file.Seek( 2, SEEK_CUR );108		}109		file.Close();110	}111	112	return Cnt;...

Scanner.js

Source:Scanner.js

...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"...

reader.spec.js

Source:reader.spec.js

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();
...

Using AI Code Generation

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,

Using AI Code Generation

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");

Using AI Code Generation

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");

Using AI Code Generation

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');

Using AI Code Generation

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}

Using AI Code Generation

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}

Using AI Code Generation

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);

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.