// standard print functions
function print(s) {
    sys.print(s);
}
function println(s) {
    if (typeof s == "undefined")
        sys.print("\n");
    else
        sys.println(s);
}
function read() {
    return sys.read();
}
// ncurses-like terminal control
var con = {};
con.getch = function() {
    return sys.readKey();
};
con.move = function(y, x) {
    print(String.fromCharCode(27,91)+y+";"+x+"H");
};
con.addch = function(c) {
    graphics.putSymbol(c);
};
con.mvaddch = function(y, x, c) {
    move(y, x); addch(c);
};
con.getmaxyx = function() {
    return graphics.getTermDimension();
};
con.getyx = function() {
    return graphics.getCursorYX();
};
con.hitterminate = function() { // ^C
    sys.poke(-40, 1);
    return (sys.peek(-41) == 31 && (sys.peek(-41) == 129 || sys.peek(-41) == 130));
};
con.hiteof = function() { // ^D
    sys.poke(-40, 1);
    return (sys.peek(-41) == 32 && (sys.peek(-41) == 129 || sys.peek(-41) == 130));
};
con.color_fore = function(n) { // 0..7; -1 for transparent
    if (n < 0)
        print(String.fromCharCode(27,91)+"38;5;255m");
    else
        print(String.fromCharCode(27,91)+((n % 8)+30)+"m");
};
con.color_back = function(n) { // 0..7; -1 for transparent
    if (n < 0)
        print(String.fromCharCode(27,91)+"48;5;255m");
    else
        print(String.fromCharCode(27,91)+((n % 8)+40)+"m");
};
con.color_pair = function(fore, back) { // 0..255
    print(String.fromCharCode(27,91)+"38;5;"+fore+"m");
    print(String.fromCharCode(27,91)+"48;5;"+back+"m");
};
Object.freeze(con);
// system management  function
var system = {};
system.maxmem = function() {
    return sys.peek(-65) | (sys.peek(-66) << 8) | (sys.peek(-67) << 16) | (sys.peek(-68) << 24);
};
system.halt = function() {
    exit();
};
Object.freeze(system);
// some utilities functions
var base64 = {};
base64._lookup = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
base64._revLookup = {"=":0,"A":0,"B":1,"C":2,"D":3,"E":4,"F":5,"G":6,"H":7,"I":8,"J":9,"K":10,"L":11,"M":12,"N":13,"O":14,"P":15,"Q":16,"R":17,"S":18,"T":19,"U":20,"V":21,"W":22,"X":23,"Y":24,"Z":25,"a":26,"b":27,"c":28,"d":29,"e":30,"f":31,"g":32,"h":33,"i":34,"j":35,"k":36,"l":37,"m":38,"n":39,"o":40,"p":41,"q":42,"r":43,"s":44,"t":45,"u":46,"v":47,"w":48,"x":49,"y":50,"z":51,"0":52,"1":53,"2":54,"3":55,"4":56,"5":57,"6":58,"7":59,"8":60,"9":61,"+":62,"/":63};
base64.atobarr = function(base64str) {
    var ret = [];
    for (var i = 0; i < base64str.length; i += 4) {
        var bits = (base64._revLookup[base64str.charAt(i)] << 18) | (base64._revLookup[base64str.charAt(i+1)] << 12) | (base64._revLookup[base64str.charAt(i+2)] << 6) | (base64._revLookup[base64str.charAt(i+3)]);
        var pads = (base64str.charAt(i+2) == "=") ? 2 : ((base64str.charAt(i+3) == "=") ? 1 : 0);

        ret.push((bits >> 16) & 255);
        if (pads <= 1) ret.push((bits >> 8) & 255);
        if (pads == 0) ret.push(bits & 255);
    }
    return ret;
};
base64.atob = function(base64str) {
    var ret = "";
    for (var i = 0; i < base64str.length; i += 4) {
        var bits = (base64._revLookup[base64str.charAt(i)] << 18) | (base64._revLookup[base64str.charAt(i+1)] << 12) | (base64._revLookup[base64str.charAt(i+2)] << 6) | (base64._revLookup[base64str.charAt(i+3)]);
        var pads = (base64str.charAt(i+2) == "=") ? 2 : ((base64str.charAt(i+3) == "=") ? 1 : 0);

        ret += String.fromCharCode((bits >> 16) & 255);
        if (pads <= 1) ret += String.fromCharCode((bits >> 8) & 255);
        if (pads == 0) ret += String.fromCharCode(bits & 255);
    }
    return ret;
};
base64.btoa = function(bytes) {
    if (typeof bytes == "string") {
        for (var i = 0; i < bytes.length; i += 3) {

        }
    }
    else if (Array.isArray(bytes)) {
        for (var i = 0; i < bytes.length; i += 3) {

        }
    }
    else {
        throw "Unknown byte representation (with typeof "+typeof bytes+")";
    }
};
Object.freeze(base64);