if (!String.prototype.repeat) {
	String.prototype.repeat = function(count) {
		'use strict';
		if (this == null) {
			throw new TypeError('can\'t convert ' + this + ' to object');
		}
		var str = '' + this;
		count = +count;
		if (count != count) {
			count = 0;
		}
		if (count < 0) {
			throw new RangeError('repeat count must be non-negative');
		}
		if (count == Infinity) {
			throw new RangeError('repeat count must be less than infinity');
		}
		count = Math.floor(count);
		if (str.length == 0 || count == 0) {
			return '';
		}
		// Ensuring count is a 31-bit integer allows us to heavily optimize the
		// main part. But anyway, most current (August 2014) browsers can't handle
		// strings 1 << 28 chars or longer, so:
		if (str.length * count >= 1 << 28) {
			throw new RangeError('repeat count must not overflow maximum string size');
		}
		var rpt = '';
		for (;;) {
			if ((count & 1) == 1) {
				rpt += str;
			}
			count >>>= 1;
			if (count == 0) {
				break;
			}
			str += str;
		}
		return rpt;
	};
}

function cursorOff() {
	ansiterm.send('ext_mode','clear','cursor');
	console.gotoxy(0,24);
}

/**
 * Find a message base by code
 *
 * @param code
 * @returns {number | string|boolean}
 */
function findMsgBase(code)
{
	if (! code)
		code = "tex_data";

	// Find the actual sub-code
	var sub_code;

	for (var s in msg_area.sub) {
		var sub = msg_area.sub[s];

		if (sub.code.substr(-code.length).toLowerCase() == code)
			return sub.code;
	}

	return false;
}

/**
 * Return an argument from argv, or an error if it doesnt exit
 *
 * @param key
 * @param error
 */
function getArg(key,error,abort) {
	index = argv.indexOf(key);

	if ((index !== -1) && (! (argv[index+1] === undefined || argv[index+1].match(/^-/)))) {
		return argv[index+1];
	}

	if (abort) {
		log(LOG_ERROR,error);
		exit(1);
	}
}

function getFrame(page) {
	if (! page.index)
		page.index = 'a';

	// @todo Need to filter out SAUCE
	f = new File(system.mods_dir+'ansitex/text/'+pageStr(page)+'.tex');
	if (! f.exists || ! f.open('r')) {
		return null;
	}

	try {
		frame = JSON.parse(f.read());
		x = new Frame(0);
		frame.render = x.render;
		frame.raw = x.raw;

		// @todo Figure out how to delete this duplicate code
		Object.defineProperty(frame,'page', {
			get: function() {return this.frame+this.index}
		});

		x = null;

	} catch (error) {
		log(LOG_ERROR,error);
		return null;
	}

	log(LOG_DEBUG,'Loaded frame: ['+frame.frame+']['+frame.index+'] ('+frame.page+')');
	return frame;
}

function loadOptions() {
	ini = new File(file_cfgname(system.mods_dir,'ansitex/ctrl/videotex.ini'));

	if (!ini.open("r")) {
		return undefined;
	}

	val = ini.iniGetObject(null);

	ini.close();

	return val;
}

function msgBaseImport(msgbase,page,text) {
	var msgbase = new MsgBase(findMsgBase(msgbase));

	log(LOG_DEBUG,'Sending ['+page+'] to message base ['+msgbase.cfg.code+']');

	var hdr = { to:'All', from:'Videotex', subject:'Frame: '+page };

	var body = '';
	body += text+"\r\n";
	body += "--- " + js.exec_file + " " + '1.0' + "\r\n";

	return msgbase.save_msg(hdr, body);
}

/**
 * Return the frame as a string
 */
function pageStr(page) {
	if (! page.index)
		page.index = 'a';

	return page.frame+page.index;
}

/**
 * Save the frame
 *
 * @param frame
 */
function saveFrame(frame) {
	file = system.mods_dir+'ansitex/text/'+frame.page+'.tex';
	w = new File(file);
	if (! w.open('w')) {
		log(LOG_ERROR,'! ERROR: Unable to create TEX file for '+frame.page);
		exit(1);
	}

	w.write(JSON.stringify(frame));
	w.close();

	log(LOG_DEBUG,'Saved file: '+frame.page+'.tex');
}

function sendBaseline(text,reposition) {
	console.pushxy();
	console.gotoxy(0,24);
	console.print(text);
	console.cleartoeol();

	if (! reposition) {
		console.popxy();
	}
}