TrinetraLabs/Placebo_AI

1"use strict";2var DataReader = require("./DataReader");3var utils = require("../utils");4 5function ArrayReader(data) {6    DataReader.call(this, data);7    for(var i = 0; i < this.data.length; i++) {8        data[i] = data[i] & 0xFF;9    }10}11utils.inherits(ArrayReader, DataReader);12/**13 * @see DataReader.byteAt14 */15ArrayReader.prototype.byteAt = function(i) {16    return this.data[this.zero + i];17};18/**19 * @see DataReader.lastIndexOfSignature20 */21ArrayReader.prototype.lastIndexOfSignature = function(sig) {22    var sig0 = sig.charCodeAt(0),23        sig1 = sig.charCodeAt(1),24        sig2 = sig.charCodeAt(2),25        sig3 = sig.charCodeAt(3);26    for (var i = this.length - 4; i >= 0; --i) {27        if (this.data[i] === sig0 && this.data[i + 1] === sig1 && this.data[i + 2] === sig2 && this.data[i + 3] === sig3) {28            return i - this.zero;29        }30    }31 32    return -1;33};34/**35 * @see DataReader.readAndCheckSignature36 */37ArrayReader.prototype.readAndCheckSignature = function (sig) {38    var sig0 = sig.charCodeAt(0),39        sig1 = sig.charCodeAt(1),40        sig2 = sig.charCodeAt(2),41        sig3 = sig.charCodeAt(3),42        data = this.readData(4);43    return sig0 === data[0] && sig1 === data[1] && sig2 === data[2] && sig3 === data[3];44};45/**46 * @see DataReader.readData47 */48ArrayReader.prototype.readData = function(size) {49    this.checkOffset(size);50    if(size === 0) {51        return [];52    }53    var result = this.data.slice(this.zero + this.index, this.zero + this.index + size);54    this.index += size;55    return result;56};57module.exports = ArrayReader;58