You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1020 B
39 lines
1020 B
"use strict";
|
|
var DataReader = require("./DataReader");
|
|
var utils = require("../utils");
|
|
|
|
function StringReader(data) {
|
|
DataReader.call(this, data);
|
|
}
|
|
utils.inherits(StringReader, DataReader);
|
|
/**
|
|
* @see DataReader.byteAt
|
|
*/
|
|
StringReader.prototype.byteAt = function(i) {
|
|
return this.data.charCodeAt(this.zero + i);
|
|
};
|
|
/**
|
|
* @see DataReader.lastIndexOfSignature
|
|
*/
|
|
StringReader.prototype.lastIndexOfSignature = function(sig) {
|
|
return this.data.lastIndexOf(sig) - this.zero;
|
|
};
|
|
/**
|
|
* @see DataReader.readAndCheckSignature
|
|
*/
|
|
StringReader.prototype.readAndCheckSignature = function (sig) {
|
|
var data = this.readData(4);
|
|
return sig === data;
|
|
};
|
|
/**
|
|
* @see DataReader.readData
|
|
*/
|
|
StringReader.prototype.readData = function(size) {
|
|
this.checkOffset(size);
|
|
// this will work because the constructor applied the "& 0xff" mask.
|
|
var result = this.data.slice(this.zero + this.index, this.zero + this.index + size);
|
|
this.index += size;
|
|
return result;
|
|
};
|
|
module.exports = StringReader;
|