$JSRTS.os = require('os');
$JSRTS.fs = require('fs');
$JSRTS.prim_systemInfo = function (index) {
    switch (index) {
        case 0:
            return "node";
        case 1:
            return $JSRTS.os.platform();
    }
    return "";
};
$JSRTS.prim_writeStr = function (x) { return process.stdout.write(x) }
$JSRTS.prim_readStr = function () {
    var ret = '';
    var b = new Buffer(1024);
    var i = 0;
    while (true) {
        $JSRTS.fs.readSync(0, b, i, 1)
        if (b[i] == 10) {
            ret = b.toString('utf8', 0, i);
            break;
        }
        i++;
        if (i == b.length) {
            var nb = new Buffer(b.length * 2);
            b.copy(nb)
            b = nb;
        }
    }
    return ret;
};