37 lines
958 B
JavaScript
37 lines
958 B
JavaScript
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'use strict';
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var DataReader = require('./dataReader');
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var utils = require('./utils');
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function StringReader(data, optimizedBinaryString) {
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this.data = data;
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if (!optimizedBinaryString) {
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this.data = utils.string2binary(this.data);
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}
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this.length = this.data.length;
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this.index = 0;
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}
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StringReader.prototype = new DataReader();
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/**
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* @see DataReader.byteAt
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*/
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StringReader.prototype.byteAt = function(i) {
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return this.data.charCodeAt(i);
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};
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/**
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* @see DataReader.lastIndexOfSignature
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*/
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StringReader.prototype.lastIndexOfSignature = function(sig) {
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return this.data.lastIndexOf(sig);
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};
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/**
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* @see DataReader.readData
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*/
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StringReader.prototype.readData = function(size) {
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this.checkOffset(size);
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// this will work because the constructor applied the "& 0xff" mask.
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var result = this.data.slice(this.index, this.index + size);
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this.index += size;
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return result;
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};
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module.exports = StringReader;
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