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'use strict';
var ArrayReader = require('./arrayReader');

function Uint8ArrayReader(data) {
    if (data) {
        this.data = data;
        this.length = this.data.length;
        this.index = 0;
        this.zero = 0;
    }
}
Uint8ArrayReader.prototype = new ArrayReader();
/**
 * @see DataReader.readData
 */
Uint8ArrayReader.prototype.readData = function(size) {
    this.checkOffset(size);
    if(size === 0) {
        // in IE10, when using subarray(idx, idx), we get the array [0x00] instead of [].
        return new Uint8Array(0);
    }
    var result = this.data.subarray(this.zero + this.index, this.zero + this.index + size);
    this.index += size;
    return result;
};
module.exports = Uint8ArrayReader;