if (typeof(require) !== "undefined")
	require( ['BigInteger'], function() {} )
else if (typeof(bigInt) === "undefined")
	alert("You need to have included BigInteger.js for eth to work.")

String.prototype.pad = function(l, r) {
	if (r === null) {
		r = l
		if (!(this.substr(0, 2) == "0x" || /^\d+$/.test(this)))
			l = 0
	}
    var ret = this.bin();
	while (ret.length < l)
		ret = "\0" + ret
	while (ret.length < r)
		ret = ret + "\0"
    return ret;
}

String.prototype.unpad = function() {
	var i = this.length;
	while (i && this[i - 1] == "\0")
		--i
	return this.substr(0, i)
}

String.prototype.bin = function() {
    if (this.substr(0, 2) == "0x") {
		bytes = []
		var i = 2;
		// Check if it's odd - pad with a zero if so.
		if (this.length % 2)
			bytes.push(parseInt(this.substr(i++, 1), 16))
		for (; i < this.length - 1; i += 2)
		    bytes.push(parseInt(this.substr(i, 2), 16));
		return String.fromCharCode.apply(String, bytes);
    } else if (/^\d+$/.test(this))
		return bigInt(this.substr(0)).toHex().bin()

    // Otherwise we'll return the "String" object instead of an actual string
    return this.substr(0, this.length)
}

String.prototype.unbin = function() {
    var i, l, o = '';
    for(i = 0, l = this.length; i < l; i++) {
        var n = this.charCodeAt(i).toString(16);
        o += n.length < 2 ? '0' + n : n;
    }

    return "0x" + o;
}

String.prototype.dec = function() {
    return bigInt(this.substr(0)).toString()
}

String.prototype.hex = function() {
    return bigInt(this.substr(0)).toHex()
}