var ie = (navigator.appName == "Microsoft Internet Explorer") ;


if (Array.map == null) {
    Array.map = function (a,f) {
	if (arguments.length == 1) {
	    f = a;
	    a = this;
	}
	var res = new Array ();
	for (i in a) {
	    res[i] = f(a[i]);
	}
	return res;
    }
}












var instr_name = new Array (
    "ACC0", "ACC1", "ACC2", "ACC3", "ACC4", "ACC5", "ACC6", "ACC7", "ACC",
    "PUSH", "PUSHACC0", "PUSHACC1", "PUSHACC2", "PUSHACC3", "PUSHACC4",
    "PUSHACC5", "PUSHACC6", "PUSHACC7", "PUSHACC", "POP", "ASSIGN", "ENVACC1",
    "ENVACC2", "ENVACC3", "ENVACC4", "ENVACC", "PUSHENVACC1", "PUSHENVACC2",
    "PUSHENVACC3", "PUSHENVACC4", "PUSHENVACC", "PUSH_RETADDR", "APPLY",
    "APPLY1", "APPLY2", "APPLY3", "APPTERM", "APPTERM1", "APPTERM2", "APPTERM3",
    "RETURN", "RESTART", "GRAB", "CLOSURE", "CLOSUREREC", "OFFSETCLOSUREM2",
    "OFFSETCLOSURE0", "OFFSETCLOSURE2", "OFFSETCLOSURE", "PUSHOFFSETCLOSUREM2",
    "PUSHOFFSETCLOSURE0", "PUSHOFFSETCLOSURE2", "PUSHOFFSETCLOSURE",
    "GETGLOBAL", "PUSHGETGLOBAL", "GETGLOBALFIELD", "PUSHGETGLOBALFIELD",
    "SETGLOBAL", "ATOM0", "ATOM", "PUSHATOM0", "PUSHATOM", "MAKEBLOCK",
    "MAKEBLOCK1", "MAKEBLOCK2", "MAKEBLOCK3", "MAKEFLOATBLOCK", "GETFIELD0",
    "GETFIELD1", "GETFIELD2", "GETFIELD3", "GETFIELD", "GETFLOATFIELD",
    "SETFIELD0", "SETFIELD1", "SETFIELD2", "SETFIELD3", "SETFIELD",
    "SETFLOATFIELD", "VECTLENGTH", "GETVECTITEM", "SETVECTITEM",
    "GETSTRINGCHAR", "SETSTRINGCHAR", "BRANCH", "BRANCHIF", "BRANCHIFNOT",
    "SWITCH", "BOOLNOT", "PUSHTRAP", "POPTRAP", "RAISE", "CHECK_SIGNALS",
    "JS_CALL1", "JS_CALL2", "JS_CALL3", "JS_CALL4", "JS_CALL5", "JS_CALLN",
    "CONST0", "CONST1", "CONST2", "CONST3", "CONSTINT", "PUSHCONST0",
    "PUSHCONST1", "PUSHCONST2", "PUSHCONST3", "PUSHCONSTINT", "NEGINT",
    "ADDINT", "SUBINT", "MULINT", "DIVINT", "MODINT", "ANDINT", "ORINT",
    "XORINT", "LSLINT", "LSRINT", "ASRINT", "EQ", "NEQ", "LTINT", "LEINT",
    "GTINT", "GEINT", "OFFSETINT", "OFFSETREF", "ISINT", "GETMETHOD", "BEQ",
    "BNEQ", "BLTINT", "BLEINT", "BGTINT", "BGEINT", "ULTINT", "UGEINT",
    "BULTINT", "BUGEINT", "GETPUBMET", "GETDYNMET", "STOP", "EVENT", "BREAK"
);

function print_instr (code, ofs) {
    console.debug (instr_name[code.get (ofs)]);
}















// \in operator
function is_in (v, a) {
    for (var i in a) {
	if (v == a[i])
	    return true;
    }
    return false;
}

// index of v in a
function index_in (v, a) {
    for (var i in a) {
	if (v == a[i])
	    return i;
    }
    return -1;
}

// sprintf
function sprintf () {
    if ((arguments.length >= 1) && (typeof arguments[0] == "string")) {
	var narg = 1;
	var format = arguments[0];
	var res = "";
	var i = 0;
	while (i < format.length) {
	    if (format[i] == '%') {
		i++;
		if (i >= format.length) {
		    throw new Error ("printf: bad format");
		} else {
		    if (format[i] == '%') {
			res += "%";
			i++;
			break;
		    } else {
			var pad = ' ';
			if (!is_in(format[i], ['d','f','x','X','r'])) {
			    pad = format[i++];
			    if (i >= format.length)
				throw new Error ("printf: bad format");
			}
			var len = 0;
			var nums = ['0','1','2','3','4','5','6','7','8','9'];
			while (is_in(format[i], nums)) {
			    len = len * 10 + index_in (format[i++], nums);
			    if (i >= format.length)
				throw new Error ("printf: bad format");
			}
			if (narg >= arguments.length)
			    throw new Error ("printf: bad format");
			var fmt;
			switch (format[i++]) {
			case 'r': {
			    var m = 10;
			    if (i < format.length) {
				if (format[i] == '{')
				    i++;
				if (i >= format.length)
				    throw new Error ("printf: bad format");
				while (format[i] != '}') {
				    m = m * 10 + index_in (format[i++], nums);
				    if (i >= format.length)
					throw new Error ("printf: bad format");
				}
			    }
			    fmt = repr (arguments[narg++], m);
			    break;
			}
			case 'd' :
			case 'f' :
			    fmt =
				Number (arguments[narg++])
			    .toString (10);
			    break;
			case 'x':
			    fmt =
				Number (arguments[narg++])
			    .toString (16).toUpperCase ();
			    break;
			case 'X':
			    fmt= 
				Number (arguments[narg++])
			    .toString (16).toUpperCase ();
			    break;
			default :
			    throw new Error ("printf: bad format");
			}
			for (var j = 0;j < len - fmt.length;j++)
			    res += pad;
			res += fmt;
		    }
		}
	    } else {
		res += format[i++];
	    }
	}
    } else {
	throw new Error ("printf: bad format");
    }
    return res;
}

// gets a char from an event's keyCode (approximative)
function char_from_event (e) {
    if (e.charCode)
	return e.charCode;
    var c = e.keyCode;
    if (e.shiftKey)
	return e.keyCode;
    if (e.keyCode >= e.DOM_VK_A && e.keyCode <= e.DOM_VK_Z)
	return e.keyCode + ("a".charCodeAt(0) - "A".charCodeAt(0));
}

// store (key/value) pair
function set_cookie ( name, value) {
    document.cookie = name + "=" + escape (value);
}

// retrieve value from a key (or null)
function get_cookie (name) {
    if (document.cookie) {
        var i = document.cookie.indexOf(name);
        if ( i != -1) {
            var s = (document.cookie.indexOf( "=", i) + 1);
            var e = document.cookie.indexOf( ";", i);
            if (e == -1) e = document.cookie.length;
            return unescape(document.cookie.slice(s, e));
        }
    }
    return null;
}

// make 'daughter' inherit 'mother' by copying its prototype
// use this.mother_constructor to acces super constructor
// use this.base.x to acces mother's x field
function make_inherit (daughter, mother) {
    function tmp() {};
    tmp.prototype = mother.prototype;
    daughter.prototype = new tmp();
    daughter.prototype.constructor = daughter;
    daughter.prototype.mother_constructor = mother;
    if (mother.base)
	mother.prototype.base = mother.base;
    daughter.base = mother.prototype;
}

// get text file from url as string
function http_get (url, error) {
    var xmlhttp=false;
    if (ie) {
        try {
	    xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
	    try {
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch (E) {
		throw new Error ("Unsupported Internet Explorer");
	    }
        }
    } else {
	if (typeof XMLHttpRequest != 'undefined')
	    xmlhttp = new XMLHttpRequest();
	else
	    throw new Error ("Unsupported Browser");
    }
    try {
	xmlhttp.open("GET", url, false);
	xmlhttp.send(null);
    } catch (e) {
	throw new Error ("unable to load file " + url + ": " + e.message);
    }
    return xmlhttp.responseText;
}

// uudecode a string to a byte (int) array
function uudecode (s) {
    var out = new Array ();
    var n = 0;
    var as = s.split ("\n");
    for (var i = 1;i < as.length;i++) {
	if (as[i].length > 1 && as[i] != "end") {
	    var len = as[i].charCodeAt(0) - 0x20;
	    var k = 0;
	    for (var j = 0;j < len / 3;j++) {
		var b0 = as[i].charCodeAt(1 + j * 4 + 0),
		    b1 = as[i].charCodeAt(1 + j * 4 + 1),
		    b2 = as[i].charCodeAt(1 + j * 4 + 2),
		    b3 = as[i].charCodeAt(1 + j * 4 + 3);
		if (k++ < len) out[n++] =
		    (((b0 - 0x20) & 0x3F) << 2 & 0xFC)
		    | (((b1 - 0x20) & 0x3F) >> 4 & 0x03);            
		if (k++ < len) out[n++] =
		    (((b1 - 0x20) & 0x3F) << 4 & 0xF0)
		    | (((b2 - 0x20) & 0x3F) >> 2 & 0x0F);            
		if (k++ < len) out[n++] =
		    (((b2 - 0x20) & 0x3F) << 6 & 0xC0)
		    |  ((b3 - 0x20) & 0x3F);
	    }
	}
    }
    return out;
}

// unsigned operator <
function ult (a,b) {
    return ((a >= 0) ? ((b < 0) || (a < b)) : ((b < 0) && (a > b)));
}



var RT = [];










// tags


// blocks

function Block(size, tag) {
    this.size = size;
    this.tag = tag;
    this.content = [];
    this.offset = 0;
}

Block.prototype.get = function (i) {
    return this.content[this.offset + i];
}

Block.prototype.set = function (i, v) {
    this.content[this.offset + i] = v;
}


Block.prototype.shift = function (o) {
    var nsize = this.size - o >= 0 ? this.size - o : 0;
    var b = new Block (nsize, this.tag);
    b.content = this.content;
    b.offset = this.offset + o;
    return b;
}


var ATOM = (new Block (0,  0));

function pair (v0, v1) {
    var b = new Block (2, 0);
    b.set (0, v0);
    b.set (1, v1);
    return b;
}

function singleton (v0) {
    var b = new Block (1, 0);
    b.set (0, v0);
    return b;
}

function box_abstract (v0) {
    var b = new Block (1, 251);
    b.set (0, v0);
    return b;
}



// immediates





// lists

var nil = 0;
var cons = pair;

// floats

function float_of_int (x) {
    var b = new Block (1, 253);
    b.set (0, Number (x));
    return b;
}

function box_float (x) {
    var b = new Block (1, 253);
    b.set (0, Number (x));
    return b;
}



function float_of_bytes (bytes) {
    
    var sign = ((bytes[0] >> 7) == 1);
    var exponent = (((bytes[0] & 0x7F) << 4) | (bytes[1] >> 4 )) - 1023;
    
    var ba = [];
    for (var b = 1;b < 8;b++)
	for (var d = 0;d < 8;d++)
	    ba[(b - 1) * 8 + d - 4] = (((bytes[b] >> (7 - d)) & 1) == 1);
    
    var m = Number (1);
    for (var i = 0;i < 52;i++)
	if (ba[i])
	    m += Math.pow (2, -(i + 1));
    return box_float ((sign ? (-1) : 1) * m * Math.pow (2, exponent));
}

function bytes_of_float (x) {
    var x = x.get (0);
    var e = Math.ceil (Math.log (Math.abs (x)) / Math.log (2));
    var m = Math.abs (x * Math.pow (2, -e)) * 2 - 1;
    e += 1022;
    var bits = [];
    bits[0] = (x > 0);
    for (var i = 0;i <= 52 ; i++) {
	bits [11 + i] = (m >= 1);
	m = (m - Math.floor (m)) * 2;
    }
    for (var i = 0;i <= 10 ; i++) {
	bits [11 - i] = (((e >>> i) & 1) == 1);
    }
    var bytes = [0,0,0,0,0,0,0,0];
    for (var i = 0;i < 8 ; i++) {
	for (var j = 0;j < 8 ; j++) {
	    bytes[i] = (bytes[i] * 2) | (bits[8 * i + j] ? 1 : 0);
	}
    }
    return bytes;
}

// strings










function encode_utf8 (s) {
    var v = (new Block (0,  252));
    var vi = 0;
    for (var i = 0; i < s.length; i++) {
	var c = s.charCodeAt (i);
	if (c < 0x80) {
	    
	    v.size++;
	    v.set (vi++, c);
	} else {
	    if(c < 0x800) {
		
		v.size += 2;
		v.set (vi++, (c >> 0x06) | 0xC0);
		v.set (vi++, (c & 0x3F) | 0x80);
	    } else {
		
		v.set (vi++, (c >> 12) | 0xE0);
		v.set (vi++, ((c >> 6) & 0x3F) | 0x80);
		v.set (vi++, (c & 0x3F) | 0x80);
	    }
	}
    }
    v.size++;
    v.set (vi, 0);
    return v;
}

function decode_utf8 (v) {
    var s = "";
    for (var i = 0;i < v.size - 1;) {
	var c1 = v.get (i++);
	if (c1 < 0x80) {
	    s += String.fromCharCode(c1);
	} else {
	    if((c1 >= 0xC0) && (c1 < 0xE0)) {
		var c2 = v.get (i++);
		s += String.fromCharCode (((c1 & 0x1F) << 6) | (c2 & 0x3F));
	    } else {
		var c2 = v.get (i++);
		var c3 = v.get (i++);
		s += String.fromCharCode(((c1 & 0xF) << 12) | ((c2 & 0x3F) << 6) | (c3 & 0x3F));
	    }
	}
    }
    return s;
}

var utf8_enabled = 1;

RT.caml_js_enable_utf8  = function (v) {
    utf8_enabled = v;
    return 0;
}

RT.caml_js_utf8_enabled  = function () {
    return utf8_enabled;
}

function value_from_string (s) {
    if (utf8_enabled == 0) {
	var b = (new Block (s.length + 1,  252));
	for (var i = 0;i < s.length;i++) {
	    b.set(i,s.charCodeAt (i));
	}
	b.set(i, 0);
	return b;
    } else {
	return encode_utf8 (s);
    }
}

function string_from_value (v) {
    if (utf8_enabled == 0) {
	var s = "";
	for (var i = 0;i < v.size - 1;i++) {
	    s += String.fromCharCode (v.get (i));
	}
	return s;
    } else {
	return decode_utf8 (v);
    }
}

function string_array (a) {
    var b = new Block (a.length);
    for (var i = 0;i < a.length;i++)
	b.set (i, value_from_string (a[i]));
    return b;
}

// utils


function mk_array_from_js (s) {
    var b = (new Block (s.length,  0));
    for (var i = 0;i < s.length;i++) {
	b.set(i,s[i]);
    }
    return b;
}



function repr (v, limit) {
    var s = "";
    function string_repr_rec (v) {
	if ((!(v instanceof Block))) {
	    s += sprintf ("0x%X", v);
	} else {
	    switch (v.tag) {
	    case 252:
		s += "\"" + string_from_value (v) + "\"";
		break;
	    case 253:
		s += v.get (0).toExponential ();
		break;
	    default: {
		s += sprintf ("[(0x%02X) ", v.tag);
		for (var i = 0;i < v.size - 1 && i < limit;i++) {
		    string_repr_rec (v.get (i));
		    s += ", ";
		}
		if (i >= limit) {
		    s += "...";
		} else {
		    string_repr_rec (v.get (i));
		}
		s += "]";
	    }
	    }
	}
    }
    string_repr_rec (v);
    return s;
}










var customs = new Array ();

function register_custom (ops) {
    customs[ops.id] = ops;
}

function find_custom (id) {
    return customs[id];
}

function mk_custom (ops, val) {
    var b = new Block (2, 255);
    b.set (0, ops);
    b.set (1, val);
    return b;
}



int32_ops = {
    id : "_i",
    compare :  function (a,b) {
	return (a - b);
    },
    hash : function (a) {
	return a;
    },
    serialize : function (writer) {
	throw new Error ("int32 not supported yet");
    },
    deserialize : function (reader) {
	return mk_custom (int32_ops, reader.read32u ());
    }
};

register_custom (int32_ops);

// Caml name: Int32.neg
// Caml type: int32 -> int32
RT.caml_int32_neg = function (a) {
    var a = a.get (1);
    return mk_custom (int32_ops, -a);
}
// Caml name: Int32.add
// Caml type: int32 -> int32 -> int32
RT.caml_int32_add = function (va,vb) {
    var a = va.get (1);
    var b = vb.get (1) ;
    return mk_custom (int32_ops, a + b);
}
// Caml name: Int32.sub
// Caml type: int32 -> int32 -> int32
RT.caml_int32_sub = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a - b);
}
// Caml name: Int32.mul
// Caml type: int32 -> int32 -> int32
RT.caml_int32_mul = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a * b);
}
// Caml name: Int32.div
// Caml type: int32 -> int32 -> int32
RT.caml_int32_div = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a / b);
}
// Caml name: Int32.rem
// Caml type: int32 -> int32 -> int32
RT.caml_int32_mod = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a % b);
}
// Caml name: Int32.logand
// Caml type: int32 -> int32 -> int32
RT.caml_int32_and = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a & b);
}
// Caml name: Int32.logor
// Caml type: int32 -> int32 -> int32
RT.caml_int32_or = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a | b);
}
// Caml name: Int32.logxor
// Caml type: int32 -> int32 -> int32
RT.caml_int32_xor = function (a,b) {
    var a = a.get (1);
    var b = b.get (1) ;
    return mk_custom (int32_ops, a ^ b);
}
// Caml name: Int32.shift_left
// Caml type: int32 -> int -> int32
RT.caml_int32_lsl = function (a,b) {
    var a = a.get (1);
    return mk_custom (int32_ops, a << b);
}
// Caml name: Int32.shift_right
// Caml type: int32 -> int -> int32
RT.caml_int32_asr = function (a,b) {
    var a = a.get (1);
    return mk_custom (int32_ops, a >> b);
}
// Caml name: Int32.shift_right_logical
// Caml type: int32 -> int -> int32
RT.caml_int32_lsr = function (a,b) {
    var a = a.get (1);
    return mk_custom (int32_ops, a >>> b);
}
// Caml name: Int32.of_int
// Caml type: int -> int32
RT.caml_int32_of_int = function (a) {
    return mk_custom (int32_ops, a);
}
// Caml name: Int32.to_int
// Caml type: int32 -> int
RT.caml_int32_to_int = function (a) {
    return a.get (1);
}
// Caml name: Int32.format
// Caml type: string -> int32 -> string
RT.caml_int32_format = function (f, v) {
    return RT.caml_format_int.call (this, f, v.get (1));
}
// Caml name: Int32.of_string
// Caml type: string -> int32
RT.caml_int32_of_string = function (s) {
    return mk_custom (int32_ops, RT.caml_int_of_string.call (this, s));
}




nativeint_ops = {
    id : "_n",
    compare : function (a,b) {
	return (a - b);
    },
    hash : function (a) {
	return a;
    },
    serialize : function (writer) {
	throw new Error ("nativeint not supported yet");
    },
    deserialize : function (reader) {
	var l = reader.read8u ();
	if (l == 1)
	    return mk_custom (nativeint_ops, reader.read32u ());
	else
	    throw new Error ("> 32 bits native int not supported yet");
    }
};

register_custom (nativeint_ops);

RT.caml_nativeint_shift_left = function (x, s) {
    return (x << s);
}

RT.caml_nativeint_sub = function (a,b) {
    return (a - b);
}



function Int64 () {}

int64_compare = function (a, b) {
    var t = int64_sub (a, b).get (1).t;
    var is_zero = true;
    for (var i = 0;i < 8;i++)
	if (t[i] != 0) is_zero = false;
    if (is_zero)
	return 0;
    return (((t[0] >> 7) == 1) ? -1 : 1);
}
int64_add = function (a, b) {
    a = a.get (1);
    b = b.get (1);
    var r = new Int64 ();
    r.t = [];
    var carry = 0;
    for (var i = 0;i < 8;i++) {
	r.t[i] = a.t[i] + b.t[i] + carry;
	carry = r.t[i] >> 8;
	r.t[i] &= 0xFF;
    }
    return mk_custom (int64_ops, r);
}
int64_neg = function (a) {
    a = a.get (1);
    var r = new Int64 ();
    r.t = [];
    for (var i = 0;i < 8;i++)
	r.t[i] = a.t[i] ^ 0xFF;
    var carry = 1;
    for (var i = 0;i < 8;i++) {
	r.t[i] = a.t[i] +carry;
	carry = r.t[i] >> 8;
	r.t[i] &= 0xFF;
    }
    return mk_custom (int64_ops, r);
}
int64_sub = function (a, b) {
    return int64_add (a, int64_neg (b));
}
int64_of_int = function (x) {
    
    var r = new Int64 ();
    r.t = [];
    for (var i = 0;i < INTEGER_SIZE / 8;i++)
	r.t[7 - i] = (x >> (i * 8)) & 0xFF;
    if (x >> (INTEGER_SIZE - 1) == 1)
	for (var i = INTEGER_SIZE / 8 - 1;i < 8;i++)
	    r.t[7 - i] = 0xFF;
    return mk_custom (int64_ops, r);
}
int64_of_bytes = function (bytes) {
    var r = new Int64 ();
    r.t = [];
    for (var i = 0;i < 8;i++)
	r.t[i] = bytes[i];
    return mk_custom (int64_ops, r);
}
int64_of_bytes_le = function (bytes) {
    var r = new Int64 ();
    r.t = [];
    for (var i = 0;i < 8;i++)
	r.t[i] = bytes[7 - i];
    return mk_custom (int64_ops, r);
}
int64_to_bytes = function (a) {
    return a.get (1).t;
}

int64_ops = {
    id : "_j",
    compare : function (a,b) {
	int64_compare (a, b);
    },
    hash : function (a) {
	return 0;
    },
    serialize : function (v, writer) {
	var t = int64_to_bytes (v.get (1));
	for (var j = 0;j < 8;j++)
	    writer.write (8, t[j]);
	writer.size_32 += 2 + ((8 + 3) >> 2);
	writer.size_64 += 2 + ((8 + 7) >> 3);
    },
    deserialize : function (reader) {
	var t = [];
	for (var j = 0;j < 8;j++)
	    t[j] = reader.read8u();
	return int64_of_bytes (t);
    }
};

register_custom (int64_ops);









var INTEXT_MAGIC_NUMBER = 0x8495A6BE, PREFIX_SMALL_BLOCK =  0x80,
    PREFIX_SMALL_INT =    0x40,       PREFIX_SMALL_STRING = 0x20;

var CODE_INT8 =      0x00, CODE_INT16 =      0x01,
    CODE_INT32 =     0x02, CODE_INT64 =      0x03,
    CODE_SHARED8 =   0x04, CODE_SHARED16 =   0x05,
    CODE_SHARED32 =  0x06, CODE_BLOCK32 =    0x08,
    CODE_BLOCK64 =   0x13, CODE_STRING8 =    0x09,
    CODE_STRING32 =  0x0A, CODE_DOUBLE_BIG = 0x0B,
    CODE_DOUBLE_LITTLE =         0x0C, CODE_DOUBLE_ARRAY8_BIG =  0x0D,
    CODE_DOUBLE_ARRAY8_LITTLE =  0x0E, CODE_DOUBLE_ARRAY32_BIG = 0x0F,
    CODE_DOUBLE_ARRAY32_LITTLE = 0x07, CODE_CODEPOINTER =        0x10,
    CODE_INFIXPOINTER =          0x11, CODE_CUSTOM =             0x12;
//    CODE_DOUBLE_NATIVE =         CODE_DOUBLE_BIG,
//    CODE_DOUBLE_ARRAY8_NATIVE =  CODE_DOUBLE_ARRAY8_BIG,
//    CODE_DOUBLE_ARRAY32_NATIVE = CODE_DOUBLE_ARRAY32_BIG,
//    CODE_DOUBLE_NATIVE =         CODE_DOUBLE_LITTLE,
//    CODE_DOUBLE_ARRAY8_NATIVE =  CODE_DOUBLE_ARRAY8_LITTLE,
//    CODE_DOUBLE_ARRAY32_NATIVE = CODE_DOUBLE_ARRAY32_LITTLE,
//    ENTRIES_PER_TRAIL_BLOCK =  1025, SIZE_EXTERN_OUTPUT_BLOCK = 8100;

function Reader (chunk) {
    this.chunk = chunk;
    this.chunk_idx = 0;
}

Reader.prototype.read8u = function () {
    return this.chunk[this.chunk_idx++];
}
Reader.prototype.read8s = function () {
    var r = this.chunk[this.chunk_idx++];
    if (r & 0x80)
	return r - 256;
    else
	return r;
}
Reader.prototype.read16u = function () {
    var r = this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    return r;
}
Reader.prototype.read16s = function () {
    var r = this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    if (r & 0x8000)
	return r - 65536;
    else
	return r;
}

Reader.prototype.read32u = function () {
    var r = this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    return r;
}
Reader.prototype.read32s = function () {
    var r = this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    r = (r << 8) | this.chunk[this.chunk_idx++];
    return r;
}

function input_size (chunk, error) {
    var reader = new Reader (chunk);

    if (reader.read8u () != 0x84
	|| reader.read8u () != 0x95
	|| reader.read8u () != 0xA6
	|| reader.read8u () != 0xBE){
	error ("ill-formed message (bad magic)");
    }

    var block_len = reader.read32u ();
    return block_len;
}

function input_val (chunk, error) {
    var reader = new Reader (chunk);

    if (reader.read8u () != 0x84
	|| reader.read8u () != 0x95
	|| reader.read8u () != 0xA6
	|| reader.read8u () != 0xBE){
	error ("ill-formed message (bad magic)");
    }

    
    var block_len = reader.read32u ();
    var num_objects = reader.read32u ();
    var size_32 = reader.read32u ();
    var size_64 = reader.read32u ();

    var intern_obj_table = [];
    var obj_counter = 0;
    function intern_rec () {
	var code = reader.read8u ();
	if (code >= PREFIX_SMALL_INT) {
	    if (code >= PREFIX_SMALL_BLOCK) {
		var tag = code & 0xF;
		var size = (code >> 4) & 0x7;
		var v = (new Block (size,  tag));
		intern_obj_table[obj_counter++] = v;
		for(var d = 0; d < size; d++)
		    v.set (d, intern_rec ());
		return v;
	    } else {
		return (code & 0x3F);
	    }
	} else {
	    if (code >= PREFIX_SMALL_STRING) {
		var len = (code & 0x1F);
		var v = (new Block (len + 1,  252));
		intern_obj_table[obj_counter++] = v;
		for (var d = 0;d < len;d++) {
		    v.set (d, reader.read8u ());
		}
		v.set (len, 0);
		return v;
	    } else {
		switch(code) {
		case CODE_INT8:
		    return reader.read8s ();
		case CODE_INT16:
		    return reader.read16s ();
		case CODE_INT32:
		    return reader.read32s ();
		case CODE_INT64:
		    var t = [];
		    for (var j = 0;j < 8;j++)
			t[j] = reader.read8u();
		    return int64_of_bytes (t);
		case CODE_SHARED8: {
		    var ofs = reader.read8u ();
		    return intern_obj_table[obj_counter - ofs];
		}
		case CODE_SHARED16: {
		    var ofs = reader.read16u ();
		    return intern_obj_table[obj_counter - ofs];
		}
		case CODE_SHARED32: {
		    var ofs = reader.read32u ();
		    return intern_obj_table[obj_counter - ofs];
		}
		case CODE_BLOCK32: {
		    var header = reader.read32u ();
		    var tag = header & 0xFF;
		    var size = header >> 10;
		    var v = (new Block (size,  tag));
		    intern_obj_table[obj_counter++] = v;
		    for(var d = 0; d < size; d++)
			v.set (d, intern_rec ());
		    return v;
		}
		case CODE_BLOCK64:
		    error ("data block too large");
		    break;
		case CODE_STRING8: {
		    var len = reader.read8u();
		    var v = (new Block (len + 1,  252));
		    intern_obj_table[obj_counter++] = v;
		    for (var d = 0;d < len;d++) {
			v.set (d, reader.read8u ());
		    }
		    v.set (len, 0);
		    return v;
		}
		case CODE_STRING32: {
		    var len = reader.read32u();
		    var v = (new Block (len + 1,  252));
		    intern_obj_table[obj_counter++] = v;
		    for (var d = 0;d < len;d++) {
			v.set (d, reader.read8u ());
		    }
		    v.set (len, 0);
		    return v;
		}
		case CODE_DOUBLE_LITTLE: {
		    var t = [];
		    for (var i = 0;i < 8;i++)
			t[7 - i] = reader.read8u();
		    return float_of_bytes (t);
		}

		case CODE_DOUBLE_BIG: {
		    var t = [];
		    for (var i = 0;i < 8;i++)
			t[i] = reader.read8u();
		    return float_of_bytes (t);
		}
		case CODE_DOUBLE_ARRAY8_LITTLE: {
		    var len = reader.read8u();
		    var v = (new Block (len,  254));
		    for (var i = 0;i < len;i++) {
			var t = [];
			for (var j = 0;j < 8;j++)
			    t[7 - j] = reader.read8u();
			v.set (i, float_of_bytes (t).get (0));
		    }
		    return v;
		}
		case CODE_DOUBLE_ARRAY8_BIG: {
		    var len = reader.read8u();
		    var v = (new Block (len,  254));
		    for (var i = 0;i < len;i++) {
			var t = [];
			for (var j = 0;j < 8;j++)
			    t[j] = reader.read8u();
			v.set (i, float_of_bytes (t).get (0));
		    }
		    return v;
		}
		case CODE_DOUBLE_ARRAY32_LITTLE: {
		    var len = reader.read32u();
		    var v = (new Block (len,  254));
		    for (var i = 0;i < len;i++) {
			var t = [];
			for (var j = 0;j < 8;j++)
			    t[7 - j] = reader.read8u();
			v.set (i, float_of_bytes (t).get (0));
		    }
		    return v;
		}
		case CODE_DOUBLE_ARRAY32_BIG: {
		    var len = reader.read32u();
		    var v = (new Block (len,  254));
		    for (var i = 0;i < len;i++) {
			var t = [];
			for (var j = 0;j < 8;j++)
			    t[j] = reader.read8u();
			v.set (i, float_of_bytes (t).get (0));
		    }
		    return v;
		}
		case CODE_CODEPOINTER:
		    
		    return reader.read32u ();
		case CODE_INFIXPOINTER: {
		    
		    var ofs = reader.read32u ();
		    var clos = intern_rec ();
		    return clos.shift (ofs);
		}
		case CODE_CUSTOM: {
		    var s = "";
		    var si = reader.read8u ();
		    while (si != 0) {
			s += String.fromCharCode (si);
			si = reader.read8u ();
		    }
		    var c = find_custom (s);
		    if (!c)
			error ("unknown custom identifier " + s);
		    else
			return c.deserialize (reader);
		}
		default:
		    error ("ill-formed message (" + code + ")");
		}
	    }
	}
    }
    var v = intern_rec ();
    return v;
}

// Caml name: unmarshal
// Type:      string -> int -> 'a
RT.caml_input_value_from_string = function (s, ofs) {
    return input_val (s.content.slice (s.offset + ofs, s.size),caml_failwith);
}

// Caml name: marshal_data_size
// Type:      string -> int -> int
RT.caml_marshal_data_size = function (s, ofs) {
    return input_size (s.content.slice (s.offset + ofs, s.size),caml_failwith);
}

function Writer () {
    this.chunk = [];
    this.chunk_idx = 20;
    this.block_len = 0;
    this.obj_counter = 0;
    this.size_32 = 0;
    this.size_64 = 0;
}

Writer.prototype.write = function (size, value) {
    for (var i = size - 8;i >= 0;i -= 8)
	this.chunk[this.chunk_idx++] = (value >> i) & 0xFF;
}

Writer.prototype.write_code = function (size, code, value) {
    this.chunk[this.chunk_idx++] = code;
    for (var i = size - 8;i >= 0;i -= 8)
	this.chunk[this.chunk_idx++] = (value >> i) & 0xFF;
}

Writer.prototype.finalize = function () {
    this.block_len = this.chunk_idx - 20;
    this.chunk_idx = 0;
    this.write (32, 0x8495A6BE);
    this.write (32, this.block_len);
    this.write (32, this.num_objects);
    this.write (32, this.size_32);
    this.write (32, this.size_64);
    return this.chunk;
}


function output_val (v, error) {
    var writer = new Writer ()
    function extern_rec (v) {
	if ((!(v instanceof Block))) {
	    if (v >= 0 && v < 0x40) {
		writer.write (8, PREFIX_SMALL_INT + v);
	    } else {
		if (v >= -(1 << 7) && v < (1 << 7)) {
		    writer.write_code(8, CODE_INT8, v);
		} else {
		    if (v >= -(1 << 15) && v < (1 << 15)) {
			writer.write_code(16, CODE_INT16, v);
		    } else {
			writer.write_code(32, CODE_INT32, v);
		    }
		}
	    }
	} else {
	    
	    if (v.size == 0) {
		if (v.tag < 16)
		    writer.write (8, PREFIX_SMALL_BLOCK + v.tag);
		else
		    writer.write_code (32, CODE_BLOCK32, (((v).size << 10) | (v).tag));
		return;
	    }
	    if (v.dejavu) {
		var d = writer.obj_counter - v.dejavu_location;
		if (d < 0x100) {
		    writer.write_code (8, CODE_SHARED8, d);
		} else {
		    if (d < 0x10000) {
			writer.write_code (16, CODE_SHARED16, d);
		    } else {
			writer.write_code (32, CODE_SHARED32, d);
		    }
		}
		return;
	    }
	    switch(v.tag) {
	    case 252: {
		var len = v.size - 1;
		if (len < 0x20) {
		    writer.write (8, PREFIX_SMALL_STRING + len);
		} else if (len < 0x100) {
		    writer.write_code (8, CODE_STRING8, len);
		} else {
		    writer.write_code (32, CODE_STRING32, len);
		}
		for (var i = 0;i < le;i++)
		    writer.write (8, v.get (i));
		writer.size_32 += 1 + (len + 4) / 4;
		writer.size_64 += 1 + (len + 8) / 8;
		v.dejavu = true;
		v.dejavu_location = writer.num_objects++;
		break;
	    }
	    case 253: {
		writer.write (8, CODE_DOUBLE_BIG);
		var bytes = bytes_of_float (v);
		for (var i = 0;i < 8;i++)
		    writer.write (8, bytes[i]);
		writer.size_32 += 1 + 2;
		writer.size_64 += 1 + 1;
		v.dejavu = true;
		v.dejavu_location = writer.num_objects++;
		break;
	    }
	    case 254: {
		if (v.size < 0x100)
		    writer.write_code (8, CODE_DOUBLE_ARRAY8_BIG, v.size);
		else
		    writer.write_code (32, CODE_DOUBLE_ARRAY8_BIG, v.size);
		for (var j = 0;j < v.size;j++) {
		    var bytes = bytes_of_float (v.get (j));
		    for (var i = 0;i < 8;i++)
			writer.write (8, bytes[i]);
		}
		writer.size_32 += 1 + nfloats * 2;
		writer.size_64 += 1 + nfloats;
		v.dejavu = true;
		v.dejavu_location = writer.num_objects++;
		break;
	    }
	    case 251:
		caml_invalid_arg("output_value: abstract value (Abstract)");
		break;
	    case 249:
		//	caml_invalid_arg("output_value: on verra plus tard");
		writer.write_code (32, CODE_INFIXPOINTER, v.offset);
		extern_rec(v.shift (- v.offset));
		break;
	    case 255: {
		var sz_32, sz_64;
		if (v.get (0).serialize == null)
		    invalid_arg ("output_value: abstract value (Custom)");
		writer.write(8, CODE_CUSTOM);
		for (var i = 0;i < v.get (0).id.length;i++)
		    writer.write(8, v.get (0).id.charCodeAt (i));
		writer.write(8, 0);
		
		v.get (0).serialize(v, writer);
		v.dejavu = true;
		v.dejavu_location = writer.num_objects++;
		break;
	    }
	    default: {
		if (v.tag < 16 && v.size < 8 / 4)
		    writer.write (8, PREFIX_SMALL_BLOCK + v.tag + (v.size<<4));
		else
		    writer.write_code(32, CODE_BLOCK32, (((v).size << 10) | (v).tag));
		writer.size_32 += 1 + v.size * 4;
		writer.size_64 += 1 + v.size * 4;
		v.dejavu = true;
		v.dejavu_location = writer.num_objects++;
		for (i = 1; i < v.size; i++)
		    extern_rec (v.get (i));
	    }
	    }
	}
	
    }
    
    writer.finalize ();
    return writer.chunk;
}


// Caml name: to_string
// Type:      'a -> extern_flags list -> string
RT.caml_output_value_to_string = function (v, fl) {
    
    var t = output_val (v, caml_failwith);
    return mk_array_from_js (t);
}

// Caml name: to_channel
// Type:      out_channel -> 'a -> extern_flags list -> unit
RT.caml_output_value = function (chan, v, fl) {
    
    var t = output_val (v, caml_failwith);
    for (var i = 0;i < t.length;i++)
	chan.get (0).putc (t[i]);
    return mk_array_from_js (t);
}











///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  STRINGS                                                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

// Caml name: is_printable
// Type:      char -> bool
RT.caml_is_printable = function (c) {
    return (c >= 0x20?1:0);
}

// Caml name: unsafe_fill
// Type:      string -> int -> int -> char -> unit
RT.caml_fill_string = function (s, st, len, c) {
    for (var i = 0;i < len;i++)
	s.set (st + i, c);
    return 0;
}

// Caml name: string_create
// Type:      int -> string
RT.caml_create_string = function (len) {
    var b = (new Block (len + 1,  252));
    for (var i = 0;i <= len;i++)
	b.set (i, 0);
    return b;
}

// Caml name: string_blit
// Type:      string -> int -> string -> int -> int -> unit
RT.caml_blit_string = function (s1, ofs1, s2, ofs2, n) {
    for (var i = 0;i < n;i++) {
	s2.set (ofs2 + i, s1.get (ofs1 + i));
    }
    return 0;
}

// Caml name: get
// Type:      string -> int -> char
RT.caml_string_get = function (arr, idx) {
    if (idx >= 0 && idx < arr.size - 1) {
	return arr.get(idx);
    }
    this.array_bound_error ();
}

// Caml name: unsafe_get
// Type:      string -> int -> char
RT.caml_string_unsafe_get = function (arr, idx) {
    return arr.get(idx);
}

// Caml name: set
// Type:      string -> int -> char -> unit
RT.caml_string_set = function (arr, idx, val) {
    if (idx >= 0 && idx < arr.size - 1) {
	arr.set(idx,val);
	return 0;
    }
    this.array_bound_error ();
}

// Caml name: unsafe_set
// Type:      string -> int -> char -> unit
RT.caml_string_unsafe_set = function (arr, idx, val) {
    arr.set(idx,val);
    return 0;
}

// Caml name: string_length
// Type:      string -> int
RT.caml_ml_string_length = function (s) {
    return (s.size - 1);
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  ARRAYS                                                                   //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

// Caml name: get
// Type:      'a array -> int -> 'a
RT.caml_array_get = 
RT.caml_array_get_addr = 
RT.caml_array_get_float = function (arr, idx) {
    if (idx >= 0 && idx < arr.size) {
	return arr.get(idx);
    }
    this.array_bound_error ();
}

// Caml name: set
// Type:      'a array -> int -> 'a -> unit
RT.caml_array_set = 
RT.caml_array_set_addr = 
RT.caml_array_set_float = function (arr, idx, val) {
    if (idx >= 0 && idx < arr.size) {
	arr.set(idx,val);
	return 0;
    }
    this.array_bound_error ();
}

// Caml name: unsafe_get
// Type:      'a array -> int -> 'a
RT.caml_array_unsafe_get = 
RT.caml_array_unsafe_get_addr = 
RT.caml_array_unsafe_get_float = function (arr, idx) {
    return arr.get(idx);
}

// Caml name: unsafe_set
// Type:      'a array -> int -> 'a -> unit
RT.caml_array_unsafe_set = 
RT.caml_array_unsafe_set_addr = 
RT.caml_array_unsafe_set_float = function (arr, idx, val) {
    arr.set(idx,val);
    return 0;
}

// Caml name: make
// Type:      int -> 'a -> 'a array
RT.caml_make_vect = function (len, init) {
    var b = (new Block (len,  0));
    for (var i = 0;i < len;i++) {
	b.set(i,init);
    }
    return b;
}

// Caml name: make_array
// Type:      'a array -> 'a array
RT.caml_make_array = function (init) {
    var b = (new Block (init.size,  0));
    for (var i = 0;i < init.size;i++) {
	b.set(i,init.get (i));
    }
    return b;
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  COMPARE                                                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

function caml_compare (a,b) {
    if (a == b)	return 0;
    if (!(a instanceof Block)) {
	if ((b instanceof Block)) {
	    if (b.tag == 250)
		return caml_compare (a, b.get(0));
	    return -1;
	}
	return a - b;
    }
    if (!(b instanceof Block)) {
	if (a.tag == 250)
	    return caml_compare (a.get(0), b);
	return 1;
    }
    // TODO: verify closures
    if (a.tag == 247 || a.tag == 249)
	this.raise_with_string (INVALID_EXN, "equal: functional value");
    if (a.tag != b.tag)
	return a.tag - b.tag;
    if (a.tag == 255)
	return a.get (0).compare (a, b);
    if (a.tag == 253) {
	a = a.get (0);
	b = b.get (0);
	if (a == b) return 0;
	return ((a < b) ? -1 : 1);
    }
    if (a.size != b.size)
	return a.size - b.size;
    for (var i = 0;i < a.size;i++) {
	t = caml_compare (a.get(i), b.get(i));
	if (t != 0) return t;
    }
    return 0;
}


// Caml name: compare
// Type:      'a -> 'a -> int
RT.caml_string_compare =
RT.caml_compare = function (a, b) {
    return caml_compare (a,b);
}

// Caml name: (=)
// Type:      'a -> 'a -> bool
RT.caml_equal = function (a, b) {
    return (caml_compare (a,b) == 0?1:0);
}

// Caml name: (<>)
// Type:      'a -> 'a -> bool
RT.caml_notequal = function (a, b) {
    return (caml_compare (a,b) != 0?1:0);
}

// Caml name: (=)
// Type:      'a -> 'a -> bool
RT.caml_string_equal = function (a, b) {
    return (caml_compare (a,b) == 0?1:0);
}

// Caml name: (<>)
// Type:      'a -> 'a -> bool
RT.caml_string_notequal = function (a, b) {
    return (caml_compare (a,b) != 0?1:0);
}

// Caml name: (<)
// Type:      'a -> 'a -> bool
RT.caml_lessthan =
RT.caml_lt_float = function (a, b) {
    return (caml_compare (a,b) < 0?1:0);
}

// Caml name: (<=)
// Type:      'a -> 'a -> bool
RT.caml_lessequal =
RT.caml_le_float = function (a, b) {
    return (caml_compare (a,b) <= 0?1:0);
}

// Caml name: (>)
// Type:      'a -> 'a -> bool
RT.caml_greaterthan =
RT.caml_gt_float = function (a, b) {
    return (caml_compare (a,b) > 0?1:0);
}

// Caml name: (>=)
// Type:      'a -> 'a -> bool
RT.caml_greaterequal =
RT.caml_ge_float = function (a, b) {
    return (caml_compare (a,b) >= 0?1:0);
}

// Caml name: (=)
// Type:      'a -> 'a -> bool
RT.caml_eq_float = function (a, b) {
    return (caml_compare (a,b) == 0?1:0);
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  HASH                                                                     //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

function caml_hash_univ_param (count, limit, obj) {
    hash_univ_limit = limit;
    hash_univ_count = count;
    hash_accu = 0;
    hash_aux (obj);
    return (hash_accu & 0x3FFFFFFF);
}


function hash_aux(obj){
    hash_univ_limit--;
    if (hash_univ_count < 0 || hash_univ_limit < 0) return;
    
    if ((!(obj instanceof Block))) {
	hash_univ_count--;
	(hash_accu = hash_accu * 65599 + (Long_val(obj)));
	return;
    }
    
    switch (obj.tag) {
    case 252: {
	hash_univ_count--;
	for (var p = 0;p < obj.size - 1; p++)
            (hash_accu = hash_accu * 19 + (obj.get (p)));
	break;
    }
    case 253: {
	hash_univ_count--;
	var bytes = bytes_of_float (obj.get (0));
	for (var p = 7; p >= 0; p--)
            (hash_accu = hash_accu * 19 + (bytes[p]));
	break;
    }
    case 254: {
	hash_univ_count--;
	for (var j = 0; j < obj.size; j++) {
	    var bytes = bytes_of_float (obj.get (j).get (0));
	for (var p = 7; p >= 0; p--)
            (hash_accu = hash_accu * 19 + (bytes[p]));
	}
	break;
    }
    case 251:
      break;
    case 249:
	// not sure but eh, CLOSUREREC is quite implementation dependent !
	hash_aux(obj.shift (-obj.offset));
      break;
    case 250:
	hash_univ_limit++; //no goto in js
	hash_aux (obj.get (0));
	break;
    case 248:
	hash_univ_count--;
	(hash_accu = hash_accu * 65599 + (obj.get (1)));
	break;
    case 255:
	if (obj.get (0).hash != null) {
            hash_univ_count--;
            (hash_accu = hash_accu * 65599 + (obj.get (0).hash (obj)));
	}
	break;
    default: {
	hash_univ_count--;
	(hash_accu = hash_accu * 19 + (obj.tag));
	var i = obj.size;
	while (i != 0) {
            i--;
            hash_aux(obj.get (i));
	}
	break;
    }
    }
    return;
}

// Caml name: hash_param
// Type:      int -> int -> 'a -> int
RT.caml_hash_univ_param = function (count, limit, obj) {
    return caml_hash_univ_param (count, limit, obj);
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  CASTS                                                                    //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////
// Caml name: format_int
// Type:      string -> int -> string
RT.caml_format_int = function (fmt, x) {
    var fmt = string_from_value (fmt);
    var t = fmt[fmt.length - 1];
    var n = Number (x).toString (t == 'd' ? 10 : (t == 'o' ? 8 : (t == 'x' ? 16 : 10 )));
    var l = 0, c = '0';
    if (fmt.length == 3) {
	l = fmt.charCodeAt (1) - "0".charCodeAt (0);
    } else {
	if (fmt.length >= 4) {
	    c = fmt.charAt(1);
	    for (var i = 2;i <= fmt.length - 2;i++)
		l = l * 10 + (fmt.charCodeAt (i) - "0".charCodeAt (0));
	}
    }
    var rem = l - n.length;
    for (var i = 0;i < rem;i++)
	n = c + n;
    return value_from_string (n);
}

// Caml name: format_float
// Type:      string -> float -> string
RT.caml_format_float = function (fmt, x) {
    
    return value_from_string (x.get (0).toString (10));
}

// Caml name: int_of_string
// Type:      string -> int
RT.caml_int_of_string = function (s) {
    var res = parseInt (string_from_value (s));
    if (isNaN (res)) {
	this.failwith ("int_of_string");
    } else {
	return res ;
    }
}

// Caml name: float_of_string
// Type:      string -> int
RT.caml_float_of_string = function (s) {
    return box_float (parseFloat (string_from_value (s)));
}

// Caml name: int_of_float
// Type:      float -> int
RT.caml_int_of_float = function (x) {
    return Math.round (x.get (0));
}

// Caml name: float_of_int, float
// Type:      int -> float
RT.caml_float_of_int = function (x) {
    return float_of_int (x);
}

// Caml name: float_of_bits
// Type:      int64 -> float
RT.caml_int64_float_of_bits = function (i) {
    return float_of_bytes (int64_to_bytes (i));
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  OPERATORS                                                                //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

// Caml name: ( *. )
// Type:      float -> float -> float
RT.caml_mul_float = function (a, b) {
    return box_float (a.get (0) * b.get (0));
}

// Caml name: ( /. )
// Type:      float -> float -> float
RT.caml_div_float = function (a, b) {
    return box_float (a.get (0) / b.get (0));
}

// Caml name: (~-.)
// Type:      float -> float
RT.caml_neg_float = function (a) {
    return box_float (- b.get (0));
}
// Caml name: (+.)
// Type:      float -> float -> float
RT.caml_add_float = function (a, b) {
    return box_float (a.get (0) + b.get (0));
}
// Caml name: (-.)
// Type:      float -> float -> float
RT.caml_sub_float = function (a, b) {
    return box_float (a.get (0) - b.get (0));
}

// Caml name: ( ** )
// Type:      float -> float -> float
RT.caml_power_float =
RT.pow = function (a, b) {
    return box_float (Math.pow (a.get (0), b.get (0)));
}

// Caml name: exp
// Type:      float -> float
RT.caml_exp_float =
RT.exp = function (a, b) {
    return box_float (Math.exp (a.get (0), b.get (0)));
}

// Caml name: acos
// Type:      float -> float
RT.caml_acos_float =
RT.acos = function (x) {
    return box_float (Math.acos (x.get (0)));
}

// Caml name: asin
// Type:      float -> float
RT.caml_asin_float =
RT.asin = function (x) {
    return box_float (Math.asin (x.get (0)));
}

// Caml name: atan
// Type:      float -> float
RT.caml_atan_float =
RT.atan = function (x) {
    return box_float (Math.atan (x.get (0)));
}

// Caml name: atan2
// Type:      float -> float -> float
RT.caml_atan2_float =
RT.atan2 = function (a, b) {
    return box_float (Math.atan2 (a.get (0), b.get (0)));
}

// Caml name: cos
// Type:      float -> float
RT.caml_cos_float =
RT.cos = function (x) {
    return box_float (Math.cos (x.get (0)));
}

// Caml name: cosh
// Type:      float -> float
RT.caml_cosh_float =
RT.cosh = function (x) {
    x = x.get (0);
    return box_float ((Math.exp (x) + Math.exp (-x)) / 2);
}

// Caml name: log
// Type:      float -> float
RT.caml_log_float =
RT.log = function (x) {
    return box_float (Math.log (x.get (0)));
}

// Caml name: log10
// Type:      float -> float
RT.caml_log10_float =
RT.log10 = function () {
    return box_float (Math.log (x.get (0)) / Math.log (10));
}

// Caml name: sin
// Type:      float -> float
RT.caml_sin_float =
RT.sin = function (x) {
    return box_float (Math.sin (x.get (0)));
}

// Caml name: sinh
// Type:      float -> float
RT.caml_sinh_float =
RT.sinh = function (x) {
    x = x.get (0);
    return box_float ((Math.exp (x) - Math.exp (-x)) / 2);
}

// Caml name: sqrt
// Type:      float -> float
RT.caml_sqrt_float =
RT.sqrt = function (x) {
    return box_float (Math.sqrt (x.get (0)));
}

// Caml name: tan
// Type:      float -> float
RT.caml_tan_float =
RT.tan = function (x) {
    return box_float (Math.tan (x.get (0)));
}

// Caml name: tanh
// Type:      float -> float
RT.caml_tanh_float =
RT.tanh = function (x) {
    return box_float (Math.tanh (x.get (0)));
}

// Caml name: ceil
// Type:      float -> float
RT.caml_ceil_float =
RT.ceil = function (x) {
    return box_float (Math.ceil (x.get (0)));
}

// Caml name: floor
// Type:      float -> float
RT.caml_floor_float =
RT.floor = function (x) {
    return box_float (Math.floor (x.get (0)));
}

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  NOT FOR THE CASUAL USER ;-)                                              //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

var named_values = [];

// Caml name: register_named_value
// Type:      string -> 'a -> unit
RT.caml_register_named_value = function (vname, val) {
    named_values[string_from_value (vname)] = val;
    return 0;
}

// Type:      int -> unit
RT.caml_ensure_stack_capacity = function (required_space) {
    return 0;
}

// Caml name: is_block
// Type:      t -> bool
RT.caml_obj_is_block = function (x) {
    return ((x instanceof Block)?1:0);
}
// Caml name: is_int
// Type:      t -> bool
RT.caml_obj_is_int = function (x) {
    return ((!(x instanceof Block))?1:0);
}
// Caml name: tag
// Type:      t -> int
RT.caml_obj_tag = function (x) {
    return x.tag;
}
// Caml name: set_tag
// Type:      t -> int -> unit
RT.caml_obj_set_tag = function (x, tag) {
    x.tag = tag;
    return 0;
}
// Caml name: size
// Type:      t -> int
RT.caml_obj_size = function (x) {
    return x.size;
}
// Caml name: field
// Type:      t -> int -> t
RT.caml_obj_field = function (x, i) {
    return x.get (i);
}
// Caml name: set_field
// Type:      t -> int -> t -> unit
RT.caml_obj_set_field = function (x, i, v) {
    x.set (i, v);
    return 0;
}
// Caml name: new_block
// Type:      int -> int -> t
RT.caml_obj_block = function (tag, size) {
    var b = (new Block (size,  tag));
    return b;
}

// Caml name: dup
// Type:      t -> t
RT.caml_obj_dup = function (v) {
    if ((!(v instanceof Block)))
	return v;
    var b = (new Block (v.size,  v.tag));
    for (var i = 0;i < v.size;i++)
	b.set (i, v.get (i));
    return b;
}

// Caml name: truncate
// Type:      t -> int -> unit
RT.caml_obj_truncate = function (x, size) {
    x.size = size;
    return 0;
}

// Caml name: ldexp
// Type:      float -> int -> float
RT.caml_ldexp_float = function (m, e) {
    return box_float (m * Math.pow (2, e.get (0)));
}

// Caml name: frexp
// Type:      float -> float * int
RT.caml_frexp_float = function (v) {
    var x = v.get (0);
    var e = Math.ceil (Math.log (Math.abs (x)) / Math.log (2));
    return pair (box_float (x * Math.pow (2, -e)), e);
}

RT.caml_alloc_dummy = function (size) {
    return (new Block (size,  0));
}

RT.caml_update_dummy = function (dummy, newval) {
//    if (!(dummy instanceof Block) || !(newval instanceof Block) || dummy.size != newval.size) {
//	this.failwith ("caml_update_dummy");
//    }
    for (var i = 0;i < dummy.size;i++) {
	dummy.set (i, newval.get (i));
    }
    return 0;
}












// Caml name: get_argv
// Type:      unit -> string * string array
RT.caml_sys_get_argv = function (unit) {
    return pair (this.program_name, this.argv);
}

var init_time = (new Date ()).getTime () * 0.001;

// Caml name: time
// Type:      unit -> float
RT.caml_sys_time = function (unit) {
    return box_float ((new Date ()).getTime () * 0.001 - init_time);
}

// Caml name: get_config
// Type:      unit -> string * int
RT.caml_sys_get_config = function (unit) {
    var b = (new Block (2,  0));
    b.set (0, value_from_string ("Unix"));
    b.set (1, 32);
    return b;
}

// Caml name: getenv
// Type:      string -> string
RT.caml_sys_getenv = function (v) {0
    caml_raise_constant (NOT_FOUND_EXN);
}

// Caml name: random_seed
// Type:      unit -> int
RT.caml_sys_random_seed = function (unit) {
    return Math.floor(Math.random() * Math.pow(2, 31));
}


// Caml name: file_exists
// Type:      string -> bool
RT.caml_sys_file_exists = function (name) {
    try {
	http_get ("exists/" + string_from_value (name),
		  function (e) {throw e;});
	return 1;
    } catch (e) {
	return 0;
    }
}

// Caml name: is_directory
// Type:      string -> bool
RT.caml_sys_is_directory = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: remove
// Type:      string -> unit
RT.caml_sys_remove = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: rename
// Type:      string -> string -> unit
RT.caml_sys_rename = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: command
// Type:      string -> int
RT.caml_sys_system_command = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: chdir
// Type:      string -> unit
RT.caml_sys_chdir = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: getcwd
// Type:      unit -> string
RT.caml_sys_getcwd = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: readdir
// Type:      string -> string array
RT.caml_sys_read_directory = function () {
  this.failwith ("not implemented in obrowser");
}
// Caml name: signal
// Type:      int -> signal_behavior -> signal_behavior
RT.caml_install_signal_handler = function () {
  this.failwith ("not implemented in obrowser");
}










function md5 (message) {
    
    var add = function(x, y) {
	var lsw = (x & 0xFFFF) + (y & 0xFFFF);
	var msw = (x >>> 16) + (y >>> 16) + (lsw >>> 16);
	return (msw << 16) | (lsw & 0xFFFF);
    }
    
    var rol = function(x, y){
	return (x << y) | (x >>> (32 - y));
    }
    

    var buffer = [];
    for(var i = 0; i < message.length;i++)
	buffer[i >> 2] |= message[i] << (8 * (i & 3));
    buffer[i >> 2] |= 0x80 << (8 * (i & 3));
    for (i = (i & ~0x3) + 4;(i & 0x3F) < 56 ;i += 4)
	buffer[i >> 2] = 0;
    buffer[i >> 2] = message.length << 3;
    i += 4;
    buffer[i >> 2] = (message.length >> 29) & 0x1FFFFFFF;

    // loop

    var a = 0x67452301, b = 0xEFCDAB89, c = 0x98BADCFE, d = 0x10325476;
    
    for(i = 0; i < buffer.length; i += 16) {
	var temp_a = a;
	var temp_b = b;
	var temp_c = c;
	var temp_d = d;
	
	a = add(rol(add(add( a, ( b &  c) | ((~ b) &  d)), add(  buffer[i+ 0],   0xD76AA478)),   7),  b);
	d = add(rol(add(add( d, ( a &  b) | ((~ a) &  c)), add(  buffer[i+ 1],   0xE8C7B756)),   12),  a);
	c = add(rol(add(add( c, ( d &  a) | ((~ d) &  b)), add(  buffer[i+ 2],   0x242070DB)),   17),  d);
	b = add(rol(add(add( b, ( c &  d) | ((~ c) &  a)), add(  buffer[i+ 3],   0xC1BDCEEE)),   22),  c);
	a = add(rol(add(add( a, ( b &  c) | ((~ b) &  d)), add(  buffer[i+ 4],   0xF57C0FAF)),   7),  b);
	d = add(rol(add(add( d, ( a &  b) | ((~ a) &  c)), add(  buffer[i+ 5],   0x4787C62A)),   12),  a);
	c = add(rol(add(add( c, ( d &  a) | ((~ d) &  b)), add(  buffer[i+ 6],   0xA8304613)),   17),  d);
	b = add(rol(add(add( b, ( c &  d) | ((~ c) &  a)), add(  buffer[i+ 7],   0xFD469501)),   22),  c);
	a = add(rol(add(add( a, ( b &  c) | ((~ b) &  d)), add(  buffer[i+ 8],   0x698098D8)),   7),  b);
	d = add(rol(add(add( d, ( a &  b) | ((~ a) &  c)), add(  buffer[i+ 9],   0x8B44F7AF)),   12),  a);
	c = add(rol(add(add( c, ( d &  a) | ((~ d) &  b)), add(  buffer[i+10],   0xFFFF5BB1)),   17),  d);
	b = add(rol(add(add( b, ( c &  d) | ((~ c) &  a)), add(  buffer[i+11],   0x895CD7BE)),   22),  c);
	a = add(rol(add(add( a, ( b &  c) | ((~ b) &  d)), add(  buffer[i+12],   0x6B901122)),   7),  b);
	d = add(rol(add(add( d, ( a &  b) | ((~ a) &  c)), add(  buffer[i+13],   0xFD987193)),   12),  a);
	c = add(rol(add(add( c, ( d &  a) | ((~ d) &  b)), add(  buffer[i+14],   0xA679438E)),   17),  d);
	b = add(rol(add(add( b, ( c &  d) | ((~ c) &  a)), add(  buffer[i+15],   0x49B40821)),   22),  c);
	
	a = add(rol(add(add( a, ( b &  d) | ( c & (~ d))), add(  buffer[i+ 1],   0xF61E2562)),   5),  b);
	d = add(rol(add(add( d, ( a &  c) | ( b & (~ c))), add(  buffer[i+ 6],   0xC040B340)),   9),  a);
	c = add(rol(add(add( c, ( d &  b) | ( a & (~ b))), add(  buffer[i+11],   0x265E5A51)),   14),  d);
	b = add(rol(add(add( b, ( c &  a) | ( d & (~ a))), add(  buffer[i+ 0],   0xE9B6C7AA)),   20),  c);
	a = add(rol(add(add( a, ( b &  d) | ( c & (~ d))), add(  buffer[i+ 5],   0xD62F105D)),   5),  b);
	d = add(rol(add(add( d, ( a &  c) | ( b & (~ c))), add(  buffer[i+10],   0x02441453)),   9),  a);
	c = add(rol(add(add( c, ( d &  b) | ( a & (~ b))), add(  buffer[i+15],   0xD8A1E681)),   14),  d);
	b = add(rol(add(add( b, ( c &  a) | ( d & (~ a))), add(  buffer[i+ 4],   0xE7D3FBC8)),   20),  c);
	a = add(rol(add(add( a, ( b &  d) | ( c & (~ d))), add(  buffer[i+ 9],   0x21E1CDE6)),   5),  b);
	d = add(rol(add(add( d, ( a &  c) | ( b & (~ c))), add(  buffer[i+14],   0xC33707D6)),   9),  a);
	c = add(rol(add(add( c, ( d &  b) | ( a & (~ b))), add(  buffer[i+ 3],   0xF4D50D87)),   14),  d);
	b = add(rol(add(add( b, ( c &  a) | ( d & (~ a))), add(  buffer[i+ 8],   0x455A14ED)),   20),  c);
	a = add(rol(add(add( a, ( b &  d) | ( c & (~ d))), add(  buffer[i+13],   0xA9E3E905)),   5),  b);
	d = add(rol(add(add( d, ( a &  c) | ( b & (~ c))), add(  buffer[i+ 2],   0xFCEFA3F8)),   9),  a);
	c = add(rol(add(add( c, ( d &  b) | ( a & (~ b))), add(  buffer[i+ 7],   0x676F02D9)),   14),  d);
	b = add(rol(add(add( b, ( c &  a) | ( d & (~ a))), add(  buffer[i+12],   0x8D2A4C8A)),   20),  c);

	a = add(rol(add(add( a,  b ^  c ^  d), add(  buffer[i+ 5],   0xFFFA3942)),   4),  b);
	d = add(rol(add(add( d,  a ^  b ^  c), add(  buffer[i+ 8],   0x8771F681)),   11),  a);
	c = add(rol(add(add( c,  d ^  a ^  b), add(  buffer[i+11],   0x6D9D6122)),   16),  d);
	b = add(rol(add(add( b,  c ^  d ^  a), add(  buffer[i+14],   0xFDE5380C)),   23),  c);
	a = add(rol(add(add( a,  b ^  c ^  d), add(  buffer[i+ 1],   0xA4BEEA44)),   4),  b);
	d = add(rol(add(add( d,  a ^  b ^  c), add(  buffer[i+ 4],   0x4BDECFA9)),   11),  a);
	c = add(rol(add(add( c,  d ^  a ^  b), add(  buffer[i+ 7],   0xF6BB4B60)),   16),  d);
	b = add(rol(add(add( b,  c ^  d ^  a), add(  buffer[i+10],   0xBEBFBC70)),   23),  c);
	a = add(rol(add(add( a,  b ^  c ^  d), add(  buffer[i+13],   0x289B7EC6)),   4),  b);
	d = add(rol(add(add( d,  a ^  b ^  c), add(  buffer[i+ 0],   0xEAA127FA)),   11),  a);
	c = add(rol(add(add( c,  d ^  a ^  b), add(  buffer[i+ 3],   0xD4EF3085)),   16),  d);
	b = add(rol(add(add( b,  c ^  d ^  a), add(  buffer[i+ 6],   0x04881D05)),   23),  c);
	a = add(rol(add(add( a,  b ^  c ^  d), add(  buffer[i+ 9],   0xD9D4D039)),   4),  b);
	d = add(rol(add(add( d,  a ^  b ^  c), add(  buffer[i+12],   0xE6DB99E5)),   11),  a);
	c = add(rol(add(add( c,  d ^  a ^  b), add(  buffer[i+15],   0x1FA27CF8)),   16),  d);
	b = add(rol(add(add( b,  c ^  d ^  a), add(  buffer[i+ 2],   0xC4AC5665)),   23),  c);

	a = add(rol(add(add( a,  c ^ ( b | (~ d))), add(  buffer[i+ 0],   0xF4292244)),   6),  b);
	d = add(rol(add(add( d,  b ^ ( a | (~ c))), add(  buffer[i+ 7],   0x432AFF97)),   10),  a);
	c = add(rol(add(add( c,  a ^ ( d | (~ b))), add(  buffer[i+14],   0xAB9423A7)),   15),  d);
	b = add(rol(add(add( b,  d ^ ( c | (~ a))), add(  buffer[i+ 5],   0xFC93A039)),   21),  c);
	a = add(rol(add(add( a,  c ^ ( b | (~ d))), add(  buffer[i+12],   0x655B59C3)),   6),  b);
	d = add(rol(add(add( d,  b ^ ( a | (~ c))), add(  buffer[i+ 3],   0x8F0CCC92)),   10),  a);
	c = add(rol(add(add( c,  a ^ ( d | (~ b))), add(  buffer[i+10],   0xFFEFF47D)),   15),  d);
	b = add(rol(add(add( b,  d ^ ( c | (~ a))), add(  buffer[i+ 1],   0x85845DD1)),   21),  c);
	a = add(rol(add(add( a,  c ^ ( b | (~ d))), add(  buffer[i+ 8],   0x6FA87E4F)),   6),  b);
	d = add(rol(add(add( d,  b ^ ( a | (~ c))), add(  buffer[i+15],   0xFE2CE6E0)),   10),  a);
	c = add(rol(add(add( c,  a ^ ( d | (~ b))), add(  buffer[i+ 6],   0xA3014314)),   15),  d);
	b = add(rol(add(add( b,  d ^ ( c | (~ a))), add(  buffer[i+13],   0x4E0811A1)),   21),  c);
	a = add(rol(add(add( a,  c ^ ( b | (~ d))), add(  buffer[i+ 4],   0xF7537E82)),   6),  b);
	d = add(rol(add(add( d,  b ^ ( a | (~ c))), add(  buffer[i+11],   0xBD3AF235)),   10),  a);
	c = add(rol(add(add( c,  a ^ ( d | (~ b))), add(  buffer[i+ 2],   0x2AD7D2BB)),   15),  d);
	b = add(rol(add(add( b,  d ^ ( c | (~ a))), add(  buffer[i+ 9],   0xEB86D391)),   21),  c);

	a = add(a, temp_a);
	b = add(b, temp_b);
	c = add(c, temp_c);
	d = add(d, temp_d);
    }

    var w = [a, b, c, d];
    var t = [];		
    for (var i = 0; i < 4; i++)
	for (var j = 0; j < 32; j += 8)
	    t[i * 4 + j / 8] = (w[i] >> j) & 0xFF;
    return t;
}

//alert (md5 ([]) + "== d41d8cd98f00b204e9800998ecf8427e");
//alert (md5 ([65]) + " == 7fc56270e7a70fa81a5935b72eacbe29");

// Caml name: unsafe_string
// Type:      string -> int -> int -> t
RT.caml_md5_string = function (v, ofs, len) {
    var s = [];
    for (var i = 0;i < len;i++)
	s[i] = v.get (ofs + i);
    return mk_array_from_js (md5 (s));
}

// Caml name: channel
RT.caml_md5_chan = function (v, ofs, len) {
    this.failwith ("not implemented in obrowser");
}










// Caml name: thread_initialize
// Type:      unit -> unit
RT.thread_initialize = function () {
    return 0;
}

// Caml name: thread_initialize_preemption
// Type:      unit -> unit
RT.thread_initialize_preemption = function () {
    return 0;
}

// Caml name: thread_new
// Type:      (unit -> unit) -> t
RT.thread_new = function (clos) {
    // type t = pid
    return this.thread_new (clos);
}

// Caml name: thread_self
// Type:      unit -> t
RT.thread_self = function (unit) {
    return this.ctx.pid;
}

// Caml name: thread_kill
// Type:      t -> unit
RT.thread_kill = function (pid) {
    this.thread_kill (pid);
    return 0;
}

// Caml name: thread_yield
// Type:      unit -> unit
RT.thread_request_reschedule = 
RT.thread_yield = function () {
    this.thread_yield ();
    return 0;
}

// Caml name: id
// Type:      t -> int
RT.thread_id = function (pid) {
    throw pid;
}

// Caml name: thread_sleep
// Type:      unit -> unit
RT.thread_sleep = function () {
    this.ctx.status = 46;
    return 0;
}

// Caml name: thread_wakeup
// Type:      t -> unit
RT.thread_wakeup = function (pid) {
    this.thread_wakeup (pid);
    return 0;
}

// Caml name: thread_wait_pid, thread_join
// Type:      t -> unit
RT.thread_wait_pid =
RT.thread_join = function (pid) {
    this.ctx.status = 47;
    this.ctx.waiting_for = pid;
}

// Caml name: thread_delay
// Type:      float -> unit
RT.thread_delay = function (s) {
    this.thread_delay (s.get (0) * 1000);
    return 0;
}

// Caml name: thread_uncaught_exception
// Type:      exn -> unit
RT.thread_uncaught_exception = function (e) {
    debug ("Fatal error: " +
	   string_from_value (e.get(0).get(0))
	   + (this.ctx.accu.size == 2
	      ?(" " + repr (e.get (1), 1000))
	      :""));
    this.thread_kill (this.ctx.pid);
}

// Caml name: create
// Type:      unit -> t
RT.caml_js_mutex_create = function (u) {
    var mutex = { locked: false, owner:0 };
    return box_abstract (mutex);
}

// Caml name : lock
// Type:       t -> unit
RT.caml_js_mutex_lock = function (m) {
    var mutex = m.get (0);
    if (mutex.locked) {
	var vm = this ;
	this.thread_wait (mutex, function () {
		RT.caml_js_mutex_lock.call (vm, m);
	    });
    } else {
	mutex.locked = true;
	mutex.owner = this.ctx.pid;
	return 0 ;
    }
}

// Caml name : try_lock
// Type:       t -> bool
RT.caml_js_mutex_try_lock = function (m) {
    var mutex = m.get (0);
    if (mutex.locked) {
	return (false?1:0) ;
    } else {
	mutex.locked = true;
	mutex.owner = this.ctx.pid;
	return (true?1:0) ;
    }
}

// Caml name: unlock
// Type:      t -> unit
RT.caml_js_mutex_unlock = function (m) {
    var mutex = m.get (0);
    if (mutex.locked && mutex.owner == this.ctx.pid) {
	mutex.locked = false;
	this.thread_notify_one (mutex);
    }
    return 0;
}









// Caml name: js_external
// Type:      string -> int -> ('a -> 'b) option
RT.caml_js_external = function (vsym, nargs) {
    var sym = string_from_value (vsym);
    if (RT[sym] == null)
	return 0;
    this.prims[sym] = RT[sym];
    var cl;
    switch (nargs) {
    case 1:
	cl = (new Block (1,  247));
	cl.set (0, (new Block (5,  0)));
	cl.get (0).set (0, 0);
	cl.get (0).set (1, 93);
	cl.get (0).set (2, sym);
	cl.get (0).set (3, 40);
	cl.get (0).set (4, 1);
	break;
    case 2:
	var cl = (new Block (1,  247));
	cl.set (0, (new Block (8,  0)));
	cl.get (0).set (0, 42);
	cl.get (0).set (1, 1);
	cl.get (0).set (2, 1);
	cl.get (0).set (3, 11);
	cl.get (0).set (4, 94);
	cl.get (0).set (5, sym);
	cl.get (0).set (6, 40);
	cl.get (0).set (7, 2);
	break;
    case 3:
	var cl = (new Block (1,  247));
	cl.set (0, (new Block (9,  0)));
	cl.get (0).set (0, 42);
	cl.get (0).set (1, 2);
	cl.get (0).set (2, 2);
	cl.get (0).set (3, 12);
	cl.get (0).set (4, 12);
	cl.get (0).set (5, 95);
	cl.get (0).set (6, sym);
	cl.get (0).set (7, 40);
	cl.get (0).set (8, 3);
	break;
    default:
	this.failwith ("unhandled number of arguments for dyn external");
    }

    var some_cl = (new Block (1,  0));
    some_cl.set (0, cl)
    return some_cl;
}

// Caml name: children
// Type:      t -> t list
RT.caml_js_node_children = function (n) {
    var node = n;
    try {
	var res = nil;
	var cur = nil;
	var children = node.childNodes;
	for (c = 0;c < children.length;c++) {
	    if (res == nil) {
		res = cons (children[c],nil);
		cur = res;
	    } else {
		cur.set(1, cons (children[c],nil));
		cur = cur.get (1);
	    }
	}
	return res;
    } catch (e) {
	this.failwith ("caml_js_node_children: " + e.message);
    }
}
// Caml name: n_children
// Type:      t -> int
RT.caml_js_node_n_children = function (n) {
    var node = n;
    try {
	return node.childNodes.length;
    } catch (e) {
	this.failwith ("caml_js_node_n_children: " + e.message);
    }
}

// Caml name: child
// Type:      t -> int -> t
RT.caml_js_node_child = function (n, i) {
    var node = n;
    try {
	return node.childNodes[i];
    } catch (e) {
	this.failwith ("caml_js_node_n_children: " + e.message);
    }
}


// Caml name: create
// Type:      unit -> t
RT.caml_js_fragment_create = function (v) {
    return document.createDocumentFragment ();
}

// Caml name: append
// Type:      t -> Node.t -> unit
RT.caml_js_fragment_append = function (f, n) {
    var fragment = f;
    var node = n;
    try {
	fragment.appendChild (node);
    } catch (e) {
	this.failwith ("caml_js_fragment_append: " + e.message);
    }
    return 0;
}

// Caml name: flush
// Type:      Node.t -> t -> unit
RT.caml_js_fragment_flush = function (n,f) {
    var fragment = f;
    var node = n;
    try {
	node.appendChild (fragment);
    } catch (e) {
	this.failwith ("caml_js_fragment_flush: " + e.message);
    }
    return 0;
}

// Caml name: alert
// Type:      string -> unit
RT.caml_js_alert = function (msg) {
    window.alert (string_from_value (msg));
    return 0;
}

// Caml name: params
// Type:      unit -> string array
RT.caml_js_params = function (v) {
    return this.argv;
}

// Caml name: exec
// Type:      string -> string array -> unit
RT.caml_js_exec = function (url, args) {
    var argv = [];
    for (var i = 0;i < args.size;i++)
	argv[i] = string_from_value (args.get(i));
    new VM(string_from_value (url), argv).run ();
    return 0;
}


// Caml name: http_get_with_status
// Type:      string -> (int *  string)
RT.caml_js_http_get_with_status = function (vurl) {
    var url = string_from_value (vurl);

    var xmlhttp = false;
    var vm = this;
    
    if (ie) {
        try {
	    xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
	    try {
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch (E) {
		throw new Error ("Unsupported Internet Explorer");
	    }
        }
    } else {
	xmlhttp = new XMLHttpRequest();
    }
    
    try {
	xmlhttp.onreadystatechange = function () {
	    vm.thread_notify_all (xmlhttp);
	}
	xmlhttp.open("GET", url, true);
	xmlhttp.send(null);
	var cont = function  () {
	    if (xmlhttp.readyState != 4)
		vm.thread_wait (xmlhttp, cont);		
	    var b = (new Block (2,  0));
	    b.set (0, xmlhttp.status);
	    b.set (1, value_from_string (xmlhttp.responseText));
	    return b;
	}
	vm.thread_wait (xmlhttp, cont);
    } catch (e) {
	if ((e == 0xEE1515EE) || (e == 0xEE1664EE)) throw e;
	this.failwith("unable to load url " + url + ": " + e.message);
    }
}

// Caml name: http_post
// Type:      string -> string -> string -> (int *  string)
RT.caml_js_http_post = function (vurl, type, data) {
    var url = string_from_value (vurl);

    var xmlhttp = false;
    var vm = this;
    
    if (ie) {
        try {
	    xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
	    try {
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch (E) {
		throw new Error ("Unsupported Internet Explorer");
	    }
        }
    } else {
	xmlhttp = new XMLHttpRequest();
    }
    
    try {
	xmlhttp.onreadystatechange = function () {
	    vm.thread_notify_all (xmlhttp);
	}
	xmlhttp.open("POST", url, true);
	xmlhttp.setRequestHeader("Content-Type", string_from_value (type));
	xmlhttp.send(string_from_value (data));
	var cont = function  () {
	    if (xmlhttp.readyState != 4)
		vm.thread_wait (xmlhttp, cont);		
	    var b = (new Block (2,  0));
	    b.set (0, xmlhttp.status);
	    b.set (1, value_from_string (xmlhttp.responseText));
	    return b;
	}
	vm.thread_wait (xmlhttp, cont);
    } catch (e) {
	if ((e == 0xEE1515EE) || (e == 0xEE1664EE)) throw e;
	this.failwith ("unable to load url " + url + ": " + e.message);
    }
}

// Caml name: dom_of_xml
// Type:      string -> JSOO.obj
RT.caml_js_dom_of_xml = function (str) 
{
  var sstr = string_from_value (str);
  try { //IE
    xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
    xmlDoc.async = "false";
    xmlDoc.loadXML(sstr);
    return xmlDoc; 
  } catch(e) {
    try {
      parser = new DOMParser();
      xmlDoc = parser.parseFromString(sstr,"text/xml");
      return xmlDoc;
    } catch(e) { this.failwith ("unable to parse : " + e.message) }
  }
}

// Caml name: pretty_xml_of_dom
// Type:      JSOO.obj -> string
RT.caml_js_pretty_xml_of_dom = function (o)
{
  try {
    var serializer = new XMLSerializer();
    var prettyString = XML(serializer.serializeToString(o)).toXMLString();
    return (value_from_string (prettyString)) ;
  } catch(e) { this.failwith ("unable to pretty print : " + e.message) }
}

// Caml name: xml_of_dom
// Type:      JSOO.obj -> string
RT.caml_js_xml_of_dom = function (o)
{
  try {
    var serializer = new XMLSerializer();
    var xml = serializer.serializeToString(o);
    return (value_from_string (xml)) ;
  } catch (e) { this.failwith ("unable to print : " + e.message) }
}
// type obj

// Caml name:  new_obj
// Caml type:  unit -> obj
RT["jsoo_new"] = function (o) {
    return [];
}
    
// Caml name:  eval
// Caml type:  string -> obj
RT["jsoo_eval"] = function (s) {
    try {
	var code = string_from_value (s) ;
	return eval (code);
    } catch (e) {
	this.failwith("jsoo_call: " + e.message);
    }
}

// Caml name:  get
// Caml type:  string -> obj -> obj
RT["jsoo_get"] = function (f, o) {
    return o[string_from_value (f)];
}

// Caml name:  set
// Caml type:  string -> obj -> obj -> unit
 RT["jsoo_set"] = function (f, v, o) {
     o[string_from_value (f)] = v;
     return 0;
}

// Caml name:  extract
// Caml type:  obj -> value
RT["jsoo_extract"] = function (o) {
    //   | Obj of obj        0
    //   | Num of float      1
    //   | String of string  2
    //   | Block of Obj.t    3
    //   | Nil
    if (o == null)
	return 0;
    if (o instanceof Block) {
	var b = (new Block (1,  3));
	b.set (0, o);
	return b;
    }
    if (typeof o == 'string') {
	var b = (new Block (1,  2));
	b.set (0, value_from_string (o));
	return b;
    }
    if (typeof o == 'number') {
	var b = (new Block (1,  1));
	b.set (0, box_float (o));
	return b;
    }
    var b = (new Block (1,  0));
    b.set (0, o);
    return b;
}

// Caml name:  inject
// Caml type:  value -> obj
RT["jsoo_inject"] = function (o) {
    if (!(o instanceof Block))
	return null;
    if (o.tag == 2)
	return string_from_value (o.get(0));
    if (o.tag == 1)
	return o.get(0).get (0);
    return o.get (0);
}

// Caml name:  call
// Caml type:  obj -> obj array -> obj -> obj
RT["jsoo_call"] = function (d, args, o) {
    try {
	return o.apply (d, args.content) ;
    } catch (e) {
	this.failwith("jsoo_call: " + e.message);
    }
}

// Caml name:  wrap_event
// Caml type:  (unit -> unit) > obj
RT["jsoo_wrap_event"] = function (clos, res) {
    var vm = this;
    return function (evt) {
	var pid = vm.thread_new (clos);
	var p = vm.ctx;
	do {
	    if (p.pid == pid) {
		p.event_args = evt;
		break;
	    }
	    p = p.n_ctx;
	} while (p != vm.ctx);
	vm.run ();
	return null;
    }
}

// Caml name:  get_event_args
// Caml type:  unit -> obj array
RT["jsoo_get_event_args"] = function (unit) {
    return this.ctx.event_args;
}









// Caml name: make
// Type:      string -> string -> t
RT.caml_regexp_make = function (vs, vf) {
    var s = string_from_value (vs);
    var f = string_from_value (vf);
    try { 
	return box_abstract (new RegExp (s, f));
    } catch (e) {
	this.failwith ("Regexp.make: " + e.message);
    }
}

// Caml name: last_index
// Type:      t -> int
RT.caml_regexp_last_index = function (vr) { 
    var r = vr.get (0) ;
    return r.lastIndex;
}

// Caml name: test
// Type:      t -> string -> bool
RT.caml_regexp_test = function (vr, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    return (r.test (s)?1:0);
}

// Caml name: exec
// Type:      t -> string -> string array
RT.caml_regexp_exec = function (vr, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    var res = r.exec (s);
    if (res == null) {
	this.raise_constant (NOT_FOUND_EXN);
    } else {
	var vres = (new Block (res.length,  0));
	for (var i = 0;i < res.length;i++) {
	    vres.set (i, value_from_string (res[i]));
	}
	return vres;
    }
}

// Caml name: index
// Type:      t -> string -> int
RT.caml_regexp_index = function (vr, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    var i = s.search (r);
    if (i == -1) {
	this.raise_constant (NOT_FOUND_EXN);
    } else {
	return i;
    }
}

// Caml name: replace
// Type:      t -> string -> string -> string
RT.caml_regexp_replace = function (vr, vsub, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    var sub = string_from_value (vsub) ;
    return (value_from_string (s.replace (r, sub)));
}

// Caml name: replace_fun
// Type:      t -> (int -> string array -> string) -> string -> string
RT.caml_regexp_replace_fun = function (vr, vf, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    var vm = this;
    var f = function () {
	var vargs = (new Block (arguments.length - 2,  0));
	for (var i = 0; i < arguments.length - 2;i++) {
	    vargs.set (i, value_from_string (arguments[i]));
	}
	return string_from_value (vm.callback (vf, [arguments[arguments.length - 2], vargs]));
    }
    return (value_from_string (s.replace (r, f)));
}

// Caml name: split
// Type:      t -> string -> string array
RT.caml_regexp_split = function (vr, vs) {
    var r = vr.get (0) ;
    var s = string_from_value (vs) ;
    var res = s.split (r);
    var vres = (new Block (res.length,  0));
    for (var i = 0;i < res.length;i++) {
	vres.set (i, value_from_string (res[i]));
    }
    return vres;
}

var label_cache = [] ;

function jsstr(s) {
    if (s.jsstr != null)
	return s.jsstr;
    else {
	s.jsstr = string_from_value (s);
	return s.jsstr; 
    }
}

function plabel (s) {
    s = jsstr (s); 

    if (label_cache[s] != null)
	return label_cache[s] ;
    var accu = 0;
    for (var i = 0;i < s.length;i++) {
	accu = (223 * accu) | 0;
	accu = (accu + s.charCodeAt(i)) | 0;
    }
    accu &= 0x7FFFFFFF;
    if (accu > 0x3FFFFFFF)
	accu = -0x7FFFFFFF + accu - 1;

    label_cache[s] = accu ;
    return accu ;
}

var oo_table_count = 0;

function fit_size (n) {
    if (n <= 2) return n; else return (fit_size ((n + 1) / 2) * 2);
}

RT.oo_new_table = function (pm) {
    oo_table_count++;
    var methods = (new Block (pm.size * 2 + 2,  0));
    methods.set (0, pm.size);
    methods.set (1, fit_size (pm.size) * 32 / 8 - 1);
    for (var i = 2;i < methods.size;i++) {
	methods.set (i, (new Block (0,  0)));
    }
    for (var i = 0;i < pm.size;i++) {
	var plab = plabel (pm.get(i));
	methods.set (i * 2 + 3, plab);
    }
    var refnil = (new Block (1,  0));
    refnil.set (0, 0);
    return {
	methods : methods,
	by_name : [],
	by_label : [],
	previous_states : null,
	hidden_meths : [],
	vars : [],
	initializers : refnil,
	size : 2
    };
}

RT.oo_create_table = function (pm) {
    var table = RT.oo_new_table (pm) ;
    for (var i = 0;i < pm.size;i++) {
	var lab = i * 2 + 2;
	table.by_label[lab] = true;
	table.by_name[jsstr(pm.get(i))] = lab;
    }
    return table;
}

function oo_resize (table, size) {
    if (table.methods.size < size)
	table.methods.size = size;    
}

RT.oo_put = function (table, label, element) {
    oo_resize (table, label + 1);
    table.methods.set (label, element);
    return 0;
}

var method_count = 0;
var inst_var_count = 0;

RT.oo_new_method = function (table) {
    var index = table.methods.size;
    oo_resize (table, index + 1);
    return index;
}

RT.oo_get_method_label = function (table, name) {
    name = jsstr (name);
    var m = table.by_name[name];
    if (m == null) {
	m = RT.oo_new_method (table);
	table.by_name[name] = m;
	table.by_label[m] = true;
    }
    return m;
}

RT.oo_set_method = function (table, label, element) {
    method_count++;
    if (table.by_label[label]) {
	RT.oo_put (table, label, element);
    } else {
	table.hidden_meths[label] = element;
    }
}

RT.oo_get_method = function (table, label) {
    var m = table.hidden_meths[label];
    if (m)
	return m;
    else
	return table.methods.get (label);
}

function bmap (b, f) {
    var bb = (new Block (b.size,  b.tag));
    for (var i = 0;i < b.size;i++)
	bb.set (i, f (b.get (i)));
    return bb;
}

function dup (b) {
    var bb = []
    for (var i in b)
	bb[i] = b[i];
    return bb;
}

RT.oo_narrow = function (table, vars, virt_meths, concr_meths) {
    var virt_meths_labs = bmap (virt_meths, function (m) {return RT.oo_get_method_label (table, m)});
    var concr_meths_labs = bmap (concr_meths, function (m) {return RT.oo_get_method_label (table, m)});
    table.previous_states = {
	by_name : dup (table.by_name),
	by_label : dup (table.by_label),
	hidden_meths : dup (table.hidden_meths),
	tvars : dup (table.vars),
	virt_meths_labs : virt_meths_labs,
	vars : vars,
	next : table.previous_states
    }
    var nvars = [];
    if (vars) {
	for (var i = 0;i < vars.size;i++) {
	    var v = jsstr (vars.get (i));
	    if (table.vars[v])
		nvars[v] = vars[v];
	}
    }
    table.vars = nvars;
    var by_label = [];
    var by_name = [];
    for (var i = 0;i < concr_meths.size;i++) {
	var met = jsstr (concr_meths.get (i));
	var label = concr_meths_labs.get (i);
	by_name[met] = label;
	by_label[label] = (table.by_label[label] != false);
    }
    for (var i = 0 ;i < virt_meths.size;i++) {
	var met = jsstr (virt_meths.get (i));
	var label = virt_meths_labs.get (i);
	by_name[met] = label;
	by_label[label] = false;
    }
    table.by_name = by_name;
    table.by_label = by_label;
    var hidden_meths = [];
    for (var i = 0;i < virt_meths_labs.size;i++) {
	var lab = virt_meths_labs.get (i);
	var m = table.hidden_meths[lab];
	if (m)
	    hidden_meths[lab] = m;
    }
    table.hidden_meths = hidden_meths;
}

RT.oo_widen = function (table) {
    var prev = table.previous_states ;
    table.previous_states = prev.next;
    var vars = dup (prev.tvars);
    for (var i = 0;i < prev.vars.size;i++) {
	var v = jsstr (prev.vars.get (i));
	vars[v] = table.vars[v];
    }
    table.vars = vars;
    table.by_name = prev.by_name;
    table.by_label = prev.by_label;
    table.hidden_meths = dup (prev.hidden_meths);
    for (var i = 0;i < prev.virt_meths_labs.size;i++) {
	var lab = prev.virt_meths_labs[i];
	var m = table.hidden_meths[lab];
	if (m)
	    hidden_meths[lab] = m;
    }
}

RT.oo_new_slot = function (table) {
    return table.size++;
}


RT.oo_new_variable = function (table, name) {
    name = jsstr (name);
    var v = table.vars[name];
    if (v)
	return v;
    else {
	var index = RT.oo_new_slot (table);
	if (name.size != "")
	    table.vars[name] = index;
	return index;
    }
}

RT.oo_get_variable = function (table, name) {
    return table.vars[jsstr (name)];
}

RT.oo_initializers = function (table) {
    return table.initializers;
}

RT.oo_methods = function (table) {
    return table.methods;
}

RT.oo_size = function (table) {
    return table.size;
}

RT.oo_init_class_raw = function (table) {
    inst_var_count += table.size - 1;
    oo_resize (table, 3 + table.methods.get (1) * 16 / 32);
}

function debug (msg) {
    console.debug ("VM says \"" + msg + "\"");
}

function debug_val (msg, val, n) {
    if (n == null) n = 4;
    console.debug ("VM says \"" + msg + "\"" + repr (val, n));
}











function GraphicsWin (vm, width, height) {
    this._color = 0;
    this._w = width;
    this._h = height;
    this._line_width = 1;
    this.vm = vm;
    this._canvas = document.createElement ("canvas");
    this._canvas.setAttribute ("width", width);
    this._canvas.setAttribute ("height", height);
    this._canvas.setAttribute ("style", "background-color:white; margin:5px; border:1px black solid; margin:2px;");
    
    this.st = { button: false, x: 0, y: 0,keypressed: false, key: 0 };
    var win = this;
    this._canvas.onmouseover = function (e) { win.grab_input (e) } ;
    this._canvas.onmouseout = function (e) { win.release_input (e) } ;
    this._canvas.onmousedown = function (e) { win.h_canvas_mousedown (e) } ;
    this._canvas.onmousemove = function (e) { win.h_canvas_mousemove (e) } ;
    this._canvas.onmouseup = function (e) { win.h_canvas_mouseup (e) } ;
}


GraphicsWin.prototype.grab_input = function () {
    var win = this;
    this._canvas.style.border = "3px red solid";
    this._canvas.style.margin = "0px";

    this._canvas.onkeydown = function () { win.h_canvas_keydown () } ;
    this._canvas.onkeyup = function () { win.h_canvas_keyup () } ;
}

GraphicsWin.prototype.release_input = function () {
    var win = this;
    this._canvas.style.border = "1px black solid";
    this._canvas.style.margin = "2px";

    this._canvas.onkeydown = null ;
    this._canvas.onkeyup = null ;
}

GraphicsWin.prototype.set_mask = function (mask) {
    this.mask = mask;
}

GraphicsWin.prototype.h_canvas_mouseup = function (e) {
    var can = this._canvas;
    this.st.x =	e.layerX - can.offsetLeft;
    this.st.y =	this._h - (e.layerY - can.offsetTop);
    this.st.button = false;

    if (this.mask & 2) {
	this.last_answer = {
	    x : this.st.x,
	    y : this.st.y,
	    button : true,
	    keypressed : this.st.keypressed,
	    key : this.st.key
	};
	this.mask = 0;
	this.vm.thread_notify_all (this);
    }
}

GraphicsWin.prototype.h_canvas_mousedown = function (e) {
    var can = this._canvas;
    this.st.x =	e.layerX - can.offsetLeft;
    this.st.y =	this._h - (e.layerY - can.offsetTop);
    this.st.button = true;

    if (this.mask & 1) {
	this.last_answer = {
	    x : this.st.x,
	    y : this.st.y,
	    button : true,
	    keypressed : this.st.keypressed,
	    key : this.st.key
	};
	this.mask = 0;
	this.vm.thread_notify_all (this);
    }
}

GraphicsWin.prototype.h_canvas_keydown = function (e) {
    var can = this._canvas;
    this.st.keypressed = true;
    this.st.key = char_from_event (e);
}

GraphicsWin.prototype.h_canvas_keyup = function (e) {
    var can = this._canvas;
    this.st.keypressed = false;

    if (this.mask & 4) {
	this.last_answer = {
	    x : this.st.x,
	    y : this.st.y,
	    button : this.st.button,
	    keypressed : true,
	    key : this.st.key
	};
	this.mask = 0;
	this.vm.thread_notify_all (this);
    }
}

GraphicsWin.prototype.h_canvas_mousemove = function (e) {
    var can = this._canvas;
    this.st.x =	e.layerX - can.offsetLeft;
    this.st.y =	this._h - (e.layerY - can.offsetTop);

    if (this.mask & 8) {
	this.last_answer = {
	    x : this.st.x,
	    y : this.st.y,
	    button : this.st.button,
	    keypressed : this.st.keypressed,
	    key : this.st.key
	};
	this.mask = 0;
	this.vm.thread_notify_all (this);
    }
}

GraphicsWin.prototype.resize = function (w, h) {
    this._w = w;
    this._h = h;
    this._canvas.width = w;
    this._canvas.height = h;
}

GraphicsWin.prototype.get_context = function () {
    if (this.ctx == null) {
	var canvas = this._canvas;
	var ctx = canvas.getContext ("2d");
	ctx.strokeStyle = ctx.fillStyle = "rgb(" +
	    ((this._color >> 16) & 0xFF) + "," +
	    ((this._color >> 8) & 0xFF) + "," +
	    (this._color & 0xFF) + ")";
	ctx.lineWidth = 1;
	ctx.lineCap = "round";
	ctx.lineJoin = "round";
	ctx.save ();
	ctx.translate (0, this._h);
	ctx.scale (1, -1);
	ctx.translate (0.5, 0.5);
	this.ctx = ctx;
    }
    return this.ctx;
}

GraphicsWin.prototype.get_canvas = function () {
    return this._canvas;
}


















var ff = false, tt = true ;
var graphics_font = {
    height: 14,
    mapped: [
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,tt,ff,ff,ff],
	 [ff,ff,tt,ff,ff,tt,ff,ff],[ff,ff,tt,ff,ff,ff,ff,ff],[ff,ff,tt,ff,ff,ff,ff,ff],[ff,tt,tt,tt,tt,ff,ff,ff],
	 [ff,ff,tt,ff,ff,ff,ff,ff],[ff,ff,tt,ff,ff,ff,ff,ff],[ff,tt,tt,tt,tt,ff,ff,ff],[ff,ff,tt,ff,ff,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,tt,ff,tt,ff,tt,ff,ff],[ff,ff,tt,tt,tt,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,tt,ff,ff,ff,ff,ff],[ff,tt,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,tt,ff],
	 [ff,tt,ff,ff,ff,ff,ff,ff],[ff,ff,tt,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,tt,ff,ff,ff],[ff,ff,ff,ff,ff,tt,ff,ff],[tt,tt,tt,tt,tt,tt,tt,ff],
	 [ff,ff,ff,ff,ff,tt,ff,ff],[ff,ff,ff,ff,tt,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,tt,tt,tt,ff,ff,ff],
	 [ff,tt,ff,tt,ff,tt,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,tt,ff,tt,ff,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,tt,ff,tt,ff,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,tt,ff,tt,ff,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,tt,ff],[tt,tt,tt,tt,tt,tt,tt,ff],[tt,tt,tt,tt,tt,tt,tt,ff],
	 [tt,tt,tt,tt,tt,tt,tt,ff],[tt,tt,tt,tt,tt,tt,tt,ff],[tt,tt,tt,tt,tt,tt,tt,ff],[tt,tt,tt,tt,tt,tt,tt,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],
	 [ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],
	 [ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],[ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff],
	 [ff,tt,ff,tt,ff,tt,ff,ff],[tt,ff,tt,ff,tt,ff,tt,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,ff,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],
	 [ff,ff,tt,tt,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,tt,tt,tt,ff,ff,ff],[ff,ff,tt,tt,tt,ff,ff,ff],[ff,tt,tt,tt,tt,tt,ff,ff],[ff,tt,tt,tt,tt,tt,ff,ff],
	 [ff,ff,tt,tt,tt,ff,ff,ff],[ff,ff,tt,tt,tt,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [tt,tt,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,ff,ff,ff,ff],[ff,ff,ff,ff,tt,tt,ff,ff],[ff,ff,tt,tt,ff,ff,ff,ff],
	 [tt,tt,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],
	 [ff,tt,ff,ff,tt,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],[ff,tt,ff,ff,tt,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,tt,tt,ff,ff],[ff,ff,tt,tt,ff,ff,ff,ff],[tt,tt,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,tt,tt,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[tt,tt,tt,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,tt,tt,tt,tt,tt,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,tt,tt,tt,tt,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[tt,tt,tt,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff]],
	[[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],[ff,ff,ff,tt,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
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	 [ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,tt,tt,ff,ff],[ff,tt,ff,ff,ff,ff,ff,ff],[tt,ff,ff,ff,ff,ff,ff,ff],
	 [tt,tt,tt,tt,tt,ff,ff,ff],[tt,ff,ff,ff,ff,ff,ff,ff],[ff,tt,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,tt,tt,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,tt,tt,tt,ff,tt,ff],[ff,tt,ff,ff,ff,tt,ff,ff],[tt,ff,ff,ff,tt,ff,tt,ff],
	 [tt,ff,ff,tt,ff,ff,tt,ff],[tt,ff,tt,ff,ff,ff,tt,ff],[ff,tt,ff,ff,ff,tt,ff,ff],[tt,ff,tt,tt,tt,ff,ff,ff],
	 [ff,ff,ff,ff,ff,ff,ff,ff],[ff,ff,ff,ff,ff,ff,ff,ff]],
	[[tt,ff,tt,ff,ff,ff,tt,tt],[ff,ff,ff,ff,ff,ff,ff,ff],[tt,tt,tt,tt,tt,tt,tt,tt],[tt,tt,tt,tt,tt,tt,tt,tt],
	 [tt,ff,ff,tt,ff,ff,tt,tt],[ff,ff,tt,ff,ff,ff,ff,tt],[tt,ff,tt,tt,tt,tt,ff,ff],[ff,ff,tt,ff,ff,tt,ff,tt],
	 [tt,tt,tt,tt,tt,tt,tt,tt],[tt,tt,tt,tt,tt,tt,tt,tt],[tt,ff,ff,tt,ff,ff,ff,ff],[ff,ff,tt,ff,ff,ff,ff,tt],
	 [tt,tt,ff,ff,ff,ff,ff,ff],[ff,ff,tt,ff,ff,tt,ff,tt]]
    ]
}

// Caml name: raw_open_graph
// Type:      int -> int -> Js.Node.t
RT.caml_gr_open_graph = function (width, height) {
    this.graphics_win = new GraphicsWin (this, width, height);
    return this.graphics_win.get_canvas ();
}

// Caml name: raw_close_graph
// Type:      unit -> unit
RT.caml_gr_close_graph = function (unit) {
    if (this.graphics_win)
	this.graphics_win.close ();
    return 0;
}

// Caml name: set_window_title
// Type:      string -> unit
RT.caml_gr_set_window_title = function (t) {
    if (this.graphics_win)
	this.graphics_win.set_title (s);
    return 0;
}

// Caml name: resize_window
// Type:      int -> int -> unit
RT.caml_gr_resize_window = function (w, h) {
    if (this.graphics_win)
	this.graphics_win.resize (w, h);
    return 0;
}

// Caml name: clear_graph
// Type:      unit -> unit
RT.caml_gr_clear_graph = function (unit) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.fillRect (0, 0, this.graphics_win._w, this.graphics_win._h)
    }
    return 0;
}

// Caml name: size_x
// Type:      unit -> int
RT.caml_gr_size_x = function (unit) {
    if (this.graphics_win)
	return this.graphics_win._w;
    else
	return 0;
}

// Caml name: size_y
// Type:      unit -> int
RT.caml_gr_size_y = function (unit) {
    if (this.graphics_win)
	return this.graphics_win._h;
    else
	return 0;
}

// Caml name: display_mode
// Type:      bool -> unit
RT.caml_gr_display_mode = function (bool) {
    return 0;
}

// Caml name: remember_mode
// Type:      bool -> unit
RT.caml_gr_remember_mode = function (bool) {
    return 0;
}

// Caml name: synchronize
// Type:      unit -> unit
RT.caml_gr_synchronize = function (unit) {
    return 0;
}

// Caml name: set_color
// Type:      color -> unit
RT.caml_gr_set_color = function (color) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	this.graphics_win._color = color;
	ctx.strokeStyle = ctx.fillStyle = "rgb(" +
	    ((color >> 16) & 0xFF) + "," +
	    ((color >> 8) & 0xFF) + "," +
	    (color & 0xFF) + ")";
    }
    return 0;
}

// Caml name: plot
// Type:      int -> int -> unit
RT.caml_gr_plot = function (x, y) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.fillRect (x, y, 1, 1);
	this.graphics_win._x = x;
	this.graphics_win._y = y;
    }
    return 0;
}

// Caml name: point_color
// Type:      int -> int -> color
RT.caml_gr_point_color = function (x, y) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	var tmp = ctx.getImageData (x,this.graphics_win._h - y - 1,1,1);
	return (tmp.data[0] << 16) | (tmp.data[1] << 8) | tmp.data[2];
    }
    return 0;
}

// Caml name: moveto
// Type:      int -> int -> unit
RT.caml_gr_moveto = function (x, y) {
    if (this.graphics_win) {
	this.graphics_win._x = x;
	this.graphics_win._y = y;
    }
    return 0;
}

// Caml name: current_x
// Type:      unit -> int
RT.caml_gr_current_x = function (unit) {
    if (this.graphics_win)
	return this.graphics_win._x;
    else
	return 0;
}

// Caml name: current_y
// Type:      unit -> int
RT.caml_gr_current_y = function (unit) {
    if (this.graphics_win)
	return this.graphics_win._y;
    else
	return 0;
}

// Caml name: lineto
// Type:      int -> int -> unit
RT.caml_gr_lineto = function (x, y) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.beginPath ();
	ctx.moveTo (this.graphics_win._x, this.graphics_win._y);
	ctx.lineTo (x, y);
	ctx.stroke ();
	this.graphics_win._x = x;
	this.graphics_win._y = y;
    }
    return 0;
}

// Caml name: raw_draw_rect
// Type:      int -> int -> int -> int -> unit
RT.caml_gr_draw_rect = function (x, y, w, h) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.beginPath ();
	ctx.moveTo (x,y);
	ctx.lineTo (x + w,y);
	ctx.lineTo (x + w,y + h);
	ctx.lineTo (x,y + h);
	ctx.lineTo (x,y);
	ctx.stroke ();
    }
    return 0;
}

// Caml name: raw_draw_arc
// Type:      int -> int -> int -> int -> int -> int -> unit
RT.caml_gr_draw_arc = function (a) {
    return RT.caml_gr_draw_arc_nat.call (this,a[0],a[1],a[2],a[3],a[4],a[5]);
}
RT.caml_gr_draw_arc_nat = function (x,y,rx,ry,a1,a2) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.beginPath ();
	ctx.arc (x, y, rx, a1 * Math.PI / 180, a2 * Math.PI / 180, false);
	ctx.stroke ();
    }
    return 0;
}

// Caml name: raw_set_line_width
// Type:      int -> unit
RT.caml_gr_set_line_width = function (lw) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	this.graphics_win._line_width = lw;
	ctx.lineWidth = lw;
    }
    return 0;
}

// Caml name: raw_fill_rect
// Type:      int -> int -> int -> int -> unit
RT.caml_gr_fill_rect = function (x, y, w, h) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.fillRect (x, y, w, h);
    }
    return 0;
}

// Caml name: fill_poly
// Type:      (int * int) array -> unit
RT.caml_gr_fill_poly = function (p) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.beginPath ();
	if (p.size > 0)
	    ctx.moveTo (p.get (p.size - 1).get (0),
			p.get (p.size - 1).get (1));
	for (var i = 0;i < p.size;i++) {
	    ctx.lineTo (p.get (i).get (0),
			p.get (i).get (1));
	}
	ctx.fill ();
    }
    return 0;
}

// Caml name: raw_fill_arc
// Type:      int -> int -> int -> int -> int -> int -> unit
RT.caml_gr_fill_arc = function (a) {
    return RT.caml_gr_fill_arc_nat.call (this,a[0],a[1],a[2],a[3],a[4],a[5]);
}
RT.caml_gr_fill_arc_nat = function (x,y,rx,ry,a1,a2) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.beginPath ();
	ctx.arc (x, y, rx, a1 * Math.PI / 180, a2 * Math.PI / 180, false);
	ctx.fill ();
	ctx.stroke ();
    }
    return 0;
}

// Caml name: draw_char
// Type:      char -> unit
RT.caml_gr_draw_char = function (c) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	ctx.drawImage (graphics_font.mapped[c],
		       this.graphics_win._x,
		       this.graphics_win._y);
	this.graphics_win._x += 8;
	this.graphics_win._y += graphics_font.height;
    }
    return 0;
}

// Caml name: draw_string
// Type:      string -> unit
RT.caml_gr_draw_string = function (s) {
    if (this.graphics_win) {
	var ctx = this.graphics_win.get_context ();
	for (var i = 0;i < s.size - 1;i++) {
	    var img = graphics_font.mapped[s.get (i)];
	    if (img) {
		for (var y = 0;y < graphics_font.height;y++)
		    for (var x = 0;x < 8;x++)
			if (img[graphics_font.height - 1 - y][x])
			    ctx.fillRect (this.graphics_win._x + x - .5,
					  this.graphics_win._y + y - .5,
					  1, 1);
		this.graphics_win._x += 8;
	    }
	}
	this.graphics_win._y += graphics_font.height;
    }
    return 0;
}

// Caml name: set_font
// Type:      string -> unit
RT.caml_gr_set_font = function (s) {
    return 0;
}

// Caml name: set_text_size
// Type:      int -> unit
RT.caml_gr_set_text_size = function (sz) {
    return 0;
}

// Caml name: text_size
// Type:      string -> int * int
RT.caml_gr_text_size = function (s) {
    var b = (new Block (2,  0));
    b.set (0, 8 * (s.size - 1));
    b.set (1, graphics_font.height);
    return b;
}

// Caml name: make_image
// Type:      color array array -> image
RT.caml_gr_make_image = function (caa) {
    
    var imgdata = new Object ();
    imgdata.height = caa.size;
    imgdata.width = (imgdata.height > 0) ? caa.get (0).size : 0;
    for (var y = 0;y < caa.size;y++) {
	for (var x = 0;x < caa.get (y).size;x++) {
	    imgdata.data[(y * imgdata.width + x) * 4 + 0] =
		(caa.get (y).get (x) >> 16) & 0xFF;
	    imgdata.data[(y * imgdata.width + x) * 4 + 0] =
		(caa.get (y).get (x) >> 8) & 0xFF;
	    imgdata.data[(y * imgdata.width + x) * 4 + 0] =
		caa.get (y).get (x) & 0xFF;
	    imgdata.data[(y * imgdata.width + x) * 4 + 0] = 0;
	}
    }
    var img = (new Block (1,  0));
    img.set (0, imgdata);
    return img;
}

// Caml name: dump_image
// Type:      image -> color array array
RT.caml_gr_dump_image = function (img) {
    var caa = (new Block (img.height,  0));
    for (var y = 0;y < img.height;y++) {
	caa.set (y, (new Block (img.width,  0)));
	for (var x = 0;x < img.width;x++) {
	    caa.get (y).get (x) =
		(img.data[(y * imgdata.width + x) * 4 + 0] << 16)
		| (img.data[(y * imgdata.width + x) * 4 + 1] << 8)
		| img.data[(y * imgdata.width + x) * 4 + 1];
	}
    }
    return caa;
}

// Caml name: draw_image
// Type:      image -> int -> int -> unit
RT.caml_gr_draw_image = function (bimg, x, y) {
    var ctx = this.graphics_win.get_context ();
    var img = bimg.get (0);
    ctx.putImageData (img, x, this.graphics_win._h - y - img.height);
    return 0;
}

// Caml name: create_image
// Type:      int -> int -> image
RT.caml_gr_create_image = function (w, h) {
    var img = new Object ();
    img.width = w;
    img.height = h;
    img.data = new Array ();
    for (var y = 0;y < h;y++)
	for (var x = 0;x < w;x++) {
	    img.data[(y * w + x) * 4 + 0] = 0;
	    img.data[(y * w + x) * 4 + 1] = 0;
	    img.data[(y * w + x) * 4 + 2] = 0;
	    img.data[(y * w + x) * 4 + 3] = 255;
	}
    var bimg = (new Block (1,  255));
    bimg.set (0, img);
    return bimg;
}

// Caml name: blit_image
// Type:      image -> int -> int -> unit
RT.caml_gr_blit_image = function (bimg, x, y) {
    var ctx = this.graphics_win.get_context ();
    var img = bimg.get (0);
    img.data = ctx.getImageData (x, this.graphics_win._h - y - img.height,
				 img.width, img.height).data;
    return 0;
}

// Caml name: wait_next_event
// Type:      event list -> status
RT.caml_gr_wait_event = function (evl) {
    var mask = 0;
    while ((evl instanceof Block)) {
	mask |= 1 << evl.get (0);
	evl = evl.get (1);
    }

    if (mask & 16) {
	var st = (new Block (5,  0));
	st.set(0,this.graphics_win.st.x);
	st.set(1,this.graphics_win.st.y);
	st.set(2,this.graphics_win.st.button);
	st.set(3,this.graphics_win.st.keypressed);
	st.set(4, this.graphics_win.st.key);
	return st;
    } else {
	var vm = this;
	function gr_wait_cont () {
	    if (vm.graphics_win.last_answer == null)
		vm.thread_wait (vm.graphics_win, gr_wait_cont);
	    var st = (new Block (5,  0));
	    st.set(0,vm.graphics_win.last_answer.x);
	    st.set(1,vm.graphics_win.last_answer.y);
	    st.set(2,vm.graphics_win.last_answer.button);
	    st.set(3,vm.graphics_win.last_answer.keypressed);
	    st.set(4,vm.graphics_win.last_answer.key);
	    vm.graphics_win.last_answer = null;
	    return st;
	}
	this.graphics_win.set_mask (mask);
	this.thread_wait (this.graphics_win, gr_wait_cont);
    }
}

// Caml name: sound
// Type:      int -> int -> unit
RT.caml_gr_sound = function (f, d) {
    return 0;
}











function R2BLE(tbl,n) {
    var v1 = tbl.get ((n) * 2 + 1) & 0xFF ;
    var v2 = tbl.get ((n) * 2) & 0xFF ;
    var v = ((v1 << 8) | (v2)) ;
    if (v & 0x8000) {
	v = v - 0xFFFF - 1 ;
    }
    return v;
}

function run_mem (pc, mem, curr_pos) {
    var pcp = 0;
    for (;;) {
	var dst, src ;
	
	dst = pc.get (pcp++) ;
	if (dst == 0xff)
	    return ;
	src = pc.get (pcp++) ;
	if (src == 0xff) {
	    mem.set (dst, curr_pos) ;
	} else {
	    mem.set (dst, mem.get (src)) ;
	}
    }
}

function run_tag (pc, mem) {
    var pcp = 0;
    for (;;) {
	var dst, src ;
	
	dst = pc.get (pcp++) ;
	if (dst == 0xff)
	    return ;
	src = pc.get (pcp++) ;
	if (src == 0xff) {
	    mem.set (dst, -1) ;
	} else {
	    mem.set (dst, mem.get (src)) ;
	}
    }
}

// Caml name: c_engine
// Type:      lex_tables -> int -> lexbuf -> int
RT["caml_lex_engine"] = function(tbl, start_state, lexbuf) {
    var state, base, backtrk, c ;
    state = start_state;
    if (state >= 0) {
	lexbuf.set (6, (lexbuf.get (5)));
	lexbuf.set (4, (lexbuf.get (5)));
	lexbuf.set (7, -1);
    } else {
	state = -state - 1;
    }
    while (true) {
	base = R2BLE(tbl.get (0), state);
	if (base < 0) {
	    return (-base-1);
	}
	backtrk = R2BLE(tbl.get (1), state);
	if (backtrk >= 0) {
	    lexbuf.set (6, lexbuf.get (5));
	    lexbuf.set (7, backtrk);
	}
	if (lexbuf.get (5) >= lexbuf.get (2)){
	    if (lexbuf.get (8) == (false?1:0)){
		return (-state - 1);
	    } else {
		c = 256;
	    }
	} else {
	    c = lexbuf.get (1).get (lexbuf.get (5));
	    lexbuf.set (5, lexbuf.get (5) + 1);
	}
	if (R2BLE(tbl.get (4), base + c) == state)
	    state = R2BLE(tbl.get (3), base + c);
	else
	    state = R2BLE(tbl.get (2), state);
	if (state < 0) {
	    lexbuf.set (5, lexbuf.get (6));
	    if (lexbuf.get (7) == -1) {
		this.failwith("lexing: empty token");
	    } else {
		return lexbuf.get (7);
	    }
	} else {
	    if (c == 256) lexbuf.set (8, (false?1:0));
	}
    }
}


// Caml name: c_new_engine
// Type:      lex_tables -> int -> lexbuf -> int
RT["caml_new_lex_engine"] = function(tbl, start_state, lexbuf) {
    var state, base, backtrk, c, pstate ;
    state = start_state;
    if (state >= 0) {
	lexbuf.set (6, (lexbuf.get (5)));
	lexbuf.set (4, (lexbuf.get (5)));
	lexbuf.set (7, -1);
    } else {
	state = -state - 1;
    }
    while (true) {
	base = R2BLE(tbl.get (0), state);
	if (base < 0) {
	    var pc_off = R2BLE(tbl.get (5), state) ;
	    run_tag(tbl.get (10).shift (pc_off), lexbuf.get (9));
	    return (-base-1);
	}
	backtrk = R2BLE(tbl.get (1), state);
	if (backtrk >= 0) {
	    var pc_off =  R2BLE(tbl.get (6), state);
	    run_tag(tbl.get (10).shift (pc_off), lexbuf.get (9));
	    lexbuf.set (6, lexbuf.get (5));
	    lexbuf.set (7, backtrk);
	}
	if (lexbuf.get (5) >= lexbuf.get (2)){
	    if (lexbuf.get (8) == (false?1:0)){
		return (-state - 1);
	    } else {
		c = 256;
	    }
	} else {
	    c = lexbuf.get (1).get (lexbuf.get (5));
	    lexbuf.set (5, lexbuf.get (5) + 1);
	}
	pstate=state ;
	if (R2BLE(tbl.get (4), base + c) == state)
	    state = R2BLE(tbl.get (3), base + c);
	else
	    state = R2BLE(tbl.get (2), state);
	if (state < 0) {
	    lexbuf.set (5, lexbuf.get (6));
	    if (lexbuf.get (7) == -1) {
		this.failwith("lexing: empty token");
	    } else {
		return lexbuf.get (7);
	    }
	} else {
	    var base_code = R2BLE(tbl.get (5), pstate) ;
	    var pc_off ;
	    if (R2BLE(tbl.get (9), base_code + c) == pstate)
		pc_off = R2BLE(tbl.get (8), base_code + c) ;
	    else
		pc_off = R2BLE(tbl.get (7), pstate) ;
	    if (pc_off > 0) 
		run_mem(tbl.get (10).shift (pc_off),
			lexbuf.get (9), lexbuf.get (5)) ;
	    if (c == 256) lexbuf.set (8, (false?1:0));
	}
    }
}


//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  VIRTUAL MACHINE                                                         //
//                                                                          //
//////////////////////////////////////////////////////////////////////////////












function as_string (arr) {
    var s = "";
    for (var i = 0;i < arr.length;i++) {
	s += String.fromCharCode (arr[i]);
    }
    return s;
}

function load_program (url) {
    function error (s) {
	throw new Error (s);
    }

    function Buffer (url) {
	
	this.text = uudecode (http_get (url, function (e) {throw e;}));
	this.pos = 0;
//	if (as_string(this.text.slice(0,2)) != "#!")
//	    error ("bad bytecode file");

	this.seek_end (-(4 + 12));
	var trail = this.read ((4 + 12));
	if (as_string (trail.slice (4,4 + 12)) != "Caml1999X008")
	    error ("bad bytecode file (bad magic)");
	this.nsections = ((trail[0]<<24)|(trail[(0)+1]<<16)|(trail[(0)+2]<<8)|trail[(0)+3]);

	
	this.sections = [];
	this.seek_end (- ((4 + 12) + this.nsections * 8));
	for (var i = 0;i < this.nsections;i++) {
	    var t = this.read (8);
	    this.sections[i] = {
		name : as_string (t.slice (0,4)),
		len : ((t[4]<<24)|(t[(4)+1]<<16)|(t[(4)+2]<<8)|t[(4)+3])
	    };
	}
    }
    
    Buffer.prototype.seek_start = function (i) {
	this.pos = i;
    }
    
    Buffer.prototype.seek = function (i) {
	this.pos += i;
    }
    
    Buffer.prototype.seek_end = function (i) {
	this.pos = this.text.length + i;    
    }
    
    Buffer.prototype.read = function (len) {
	var r = this.text.slice (this.pos, this.pos + len);
	this.pos += len;
	return r;
    }
    
    Buffer.prototype.seek_section = function (name) {
	var ofs = (4 + 12) + this.nsections * 8;
	for (var i = this.nsections - 1;i >= 0;i--) {
	    ofs += this.sections[i].len;
	    if (this.sections[i].name == name) {
		this.seek_end (-ofs);
		return this.sections[i].len;
	    }
	}
	return -1;
    }
    
    Buffer.prototype.read_section = function (name) {
	var len = this.seek_section (name);
	if (len == -1) {
	    return null;
	}
	return this.read (len);
    }

    var buf = new Buffer (url);

    
    var code_text = buf.read_section ("CODE");
    var code = (new Block (code_text.length / 4,  0));
    for (i = 0;i < code_text.length / 4;i++)
	code.set (i, ((code_text[( i * 4)+3]<<24)|(code_text[( i * 4)+2]<<16)|(code_text[( i * 4)+1]<<8)|code_text[ i * 4]));
		      
        
    var symbols_text = buf.read_section("PRIM");
    var symbols = [];
    for (var i = 0, s = 0;i < symbols_text.length != 0;i++,s++) {
	symbols[s]= "";
	while (symbols_text[i] != 0)
	    symbols[s] += String.fromCharCode(symbols_text[i++]);
    }
    
    
    var data = input_val (buf.read_section ("DATA"), error);

    return {
	code : code,
	symbols : symbols,
	data : data
    };
}

function VM(url, argv) {
    this.program_name = value_from_string (url);
    this.argv = mk_array_from_js (Array.map (argv, value_from_string));
    this.argv = this.argv.shift(-1);
    this.argv.set (0,this.program_name);
    var program = load_program (url);
    this.syms = program.symbols;
    this.prims = [];
    for (n in this.syms)
	this.prims[n] =
	  (RT[this.syms[n]] == null)
	? ((function(n){return function () { throw (new Error("undefined primitive " + this.syms[n]))}})(n))
            : RT[this.syms[n]] ;
    this.data = program.data ;

    
    this.status = 668;

    
    this.max_pid = 1;
    this.ctx = {
	cur_code : program.code,
	pc : 0,
	sp : 0,
	caml_trap_sp : -1,
	accu : 0,
	stack : [],
	env : ATOM,
	extra_args : 0,
	status : 44,
	pid : this.max_pid++
    };
    this.ctx.n_ctx = this.ctx ;
    this.ctx.p_ctx = this.ctx ;
}

var i_tbl = {
    0: function (vm, c) {
	c.accu = c.stack[c.sp];
	return true;
    },
    1: function (vm, c) {
	c.accu = c.stack[c.sp + 1];
	return true;
    },
    2: function (vm, c) {
	c.accu = c.stack[c.sp + 2];
	return true;
    },
    3: function (vm, c) {
	c.accu = c.stack[c.sp + 3];
	return true;
    },
    4: function (vm, c) {
	c.accu = c.stack[c.sp + 4];
	return true;
    },
    5: function (vm, c) {
	c.accu = c.stack[c.sp + 5];
	return true;
    },
    6: function (vm, c) {
	c.accu = c.stack[c.sp + 6];
	return true;
    },
    7: function (vm, c) {
	c.accu = c.stack[c.sp + 7];
	return true;
    },
    8: function (vm, c) {
	c.accu = c.stack[c.sp + c.cur_code.get(c.pc++)];
	return true;
    },
    9: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	return true;
    },
    10: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	return true;
    },
    11: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 1];
	return true;
    },
    12: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 2];
	return true;
    },
    13: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 3];
	return true;
    },
    14: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 4];
	return true;
    },
    15: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 5];
	return true;
    },
    16: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 6];
	return true;
    },
    17: function (vm, c) {
	c.stack[--c.sp] = c.accu;  c.accu = c.stack[c.sp + 7];
	return true;
    },
    18: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.stack[c.sp + c.cur_code.get(c.pc++)];
	return true;
    },
    19: function (vm, c) {
	c.sp += c.cur_code.get(c.pc++);
	return true;
    },
    20: function (vm, c) {
	c.stack[c.sp + c.cur_code.get(c.pc++)] = c.accu;
	c.accu = 0;
	return true;
    },
    21: function (vm, c) {
	c.accu = c.env.get(1);
	return true;
    },
    22: function (vm, c) {
	c.accu = c.env.get(2);
	return true;
    },
    23: function (vm, c) {
	c.accu = c.env.get(3);
	return true;
    },
    24: function (vm, c) {
	c.accu = c.env.get(4);
	return true;
    },
    25: function (vm, c) {
	c.accu = c.env.get(c.cur_code.get(c.pc++));
	return true;
    },
    26: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.get(1);
	return true;
    },
    27: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.get(2);
	return true;
    },
    28: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.get(3);
	return true;
    },
    29: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.get(4);
	return true;
    },
    30: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.get(c.cur_code.get(c.pc++));
	return true;
    },
    31: function (vm, c) {
	c.sp -= 3;
	c.stack[c.sp] = c.cur_code.shift (c.pc + c.cur_code.get(c.pc));
	c.stack[c.sp + 1] = c.env;
	c.stack[c.sp + 2] = c.extra_args;
	c.pc++;
	return true;
    },
    32: function (vm, c) {
	c.extra_args = c.cur_code.get(c.pc) - 1;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	return true;
    },
    33: function (vm, c) {
	var arg1 = c.stack[c.sp];
	c.sp -= 3;
	c.stack[c.sp] = arg1;
	c.stack[c.sp + 1] = c.cur_code.shift (c.pc);
	c.stack[c.sp + 2] = c.env;
	c.stack[c.sp + 3] = c.extra_args;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args = 0;
	return true;
    },
    34: function (vm, c) {
	var arg1 = c.stack[c.sp];
	var arg2 = c.stack[c.sp + 1];
	c.sp -= 3;
	c.stack[c.sp] = arg1;
	c.stack[c.sp + 1] = arg2;
	c.stack[c.sp + 2] = c.cur_code.shift (c.pc);
	c.stack[c.sp + 3] = c.env;
	c.stack[c.sp + 4] = c.extra_args;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args = 1;
	return true;
    },
    35: function (vm, c) {
	var arg1 = c.stack[c.sp];
	var arg2 = c.stack[c.sp + 1];
	var arg3 = c.stack[c.sp + 2];
	c.sp -= 3;
	c.stack[c.sp] = arg1;
	c.stack[c.sp + 1] = arg2;
	c.stack[c.sp + 2] = arg3;
	c.stack[c.sp + 3] = c.cur_code.shift (c.pc);
	c.stack[c.sp + 4] = c.env;
	c.stack[c.sp + 5] = c.extra_args;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args = 2;
	return true;
    },
    36: function (vm, c) {
	var nargs = c.cur_code.get(c.pc++);
	var slotsize = c.cur_code.get(c.pc);
	var newsp = c.sp + slotsize - nargs;
	for (i = nargs - 1; i >= 0; i--)
	    c.stack[newsp + i] = c.stack[c.sp + i];
	c.sp = newsp;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args += nargs - 1;
	return true;
    },
    37: function (vm, c) {
	var arg1 = c.stack[c.sp];
	c.sp += c.cur_code.get (c.pc) - 1;
	c.stack[c.sp] = arg1;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;      
	return true;
    },
    38: function (vm, c) {
	var arg1 = c.stack[c.sp];
	var arg2 = c.stack[c.sp + 1];
	c.sp += c.cur_code.get (c.pc) - 2;
	c.stack[c.sp] = arg1;
	c.stack[c.sp + 1] = arg2;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args += 1;
	return true;
    },
    39: function (vm, c) {
	var arg1 = c.stack[c.sp];
	var arg2 = c.stack[c.sp + 1];
	var arg3 = c.stack[c.sp + 2];
	c.sp += c.cur_code.get (c.pc) - 3;
	c.stack[c.sp] = arg1;
	c.stack[c.sp + 1] = arg2;
	c.stack[c.sp + 2] = arg3;
	c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	c.pc = 0;
	c.env = c.accu;
	c.extra_args += 2;
	return true;
    },
    40: function (vm, c) {
	c.sp += c.cur_code.get (c.pc++);
	if (c.extra_args > 0) {
	    c.extra_args--;
	    c.cur_code = (c.accu.tag == 247 ? c.accu.get (0):c.accu);
	    c.pc = 0;
	    c.env = c.accu;
	} else {
	    c.cur_code = (c.stack[c.sp].tag == 247 ? c.stack[c.sp].get (0):c.stack[c.sp]);
	    c.pc = 0;
	    c.env = c.stack[c.sp + 1];
	    c.extra_args = c.stack[c.sp + 2];
	    c.sp += 3;
	}
	return true;
    },
    41: function (vm, c) {
	var num_args = c.env.size - 2;
	c.sp -= num_args;
	for (var i = 0; i < num_args; i++)
	    c.stack[c.sp + i] = c.env.get(i + 2);
	c.env = c.env.get (1);
	c.extra_args += num_args;
	return true;
    },
    42: function (vm, c) {
	var required = c.cur_code.get (c.pc++);
	if (c.extra_args >= required) {
	    c.extra_args -= required;
	} else {
	    var num_args;
	    num_args = 1 + c.extra_args;
	    c.accu = (new Block (num_args + 2,  247));
	    c.accu.set (0, c.cur_code.shift (c.pc - 3));
	    c.accu.set (1, c.env);
	    for (var i = 0; i < num_args; i++)
		c.accu.set(i + 2, c.stack[c.sp + i]);
	    c.sp += num_args;
	    c.cur_code = (c.stack[c.sp].tag == 247 ? c.stack[c.sp].get (0):c.stack[c.sp]);
	    c.pc = 0;
	    c.env = c.stack[c.sp + 1];
	    c.extra_args = c.stack[c.sp + 2];
	    c.sp += 3;
	}
	return true;
    },
    43: function (vm, c) {
	var nvars = c.cur_code.get (c.pc++);
	if (nvars > 0)
	    c.stack[--c.sp] = c.accu;
	c.accu = (new Block (nvars + 1,  247));
	c.accu.set(0, c.cur_code.shift (c.pc + c.cur_code.get(c.pc)));
	c.pc++;
	for (var i = 0; i < nvars; i++)
	    c.accu.set(i + 1,c.stack[c.sp + i]);
	c.sp += nvars;
	return true;
    },
    44: function (vm, c) {
	var nfuncs = c.cur_code.get (c.pc++);
	var nvars = c.cur_code.get (c.pc++);
	if (nvars > 0) c.stack[--c.sp] = c.accu;
	c.accu = (new Block (nfuncs * 2 - 1 + nvars,  247));
	for (var i = 0;i < nvars;i++)
	    c.accu.set (nfuncs * 2 - 1 + i, c.stack[c.sp++]);
	c.accu.set(0,c.cur_code.shift (c.pc + c.cur_code.get (c.pc)));
	c.stack[--c.sp] = c.accu;
	for (var i = 1; i < nfuncs; i++) {
	    var ofs = c.pc + c.cur_code.get (c.pc + i);
	    c.accu.set (i * 2 - 1, ((i * 2) << 10) | 249);
	    c.accu.set (i * 2, c.cur_code.shift (ofs));
	}
	
	var cl = c.accu;
	for (var i = 0;i < nfuncs-1;i++) {
	    cl.next = cl.shift (2);
	    cl.next.prev = cl;
	    c.stack[--c.sp] = cl.next;
	    cl = cl.next;
	}
	c.pc += nfuncs;
	return true;
    },
    45: function (vm, c) {
	c.accu = c.env.prev;
	return true;
    },
    46: function (vm, c) {
	c.accu = c.env;
	return true;
    },
    47: function (vm, c) {
	c.accu = c.env.next;
	return true;
    },
    48: function (vm, c) {
	var ofs = c.cur_code.get (c.pc++);
	c.accu = c.env;
	while (ofs > 0) {
	    c.accu = c.accu.next;
	    ofs -= 2;
	}
	while (ofs < 0) {
	    c.accu = c.accu.prev;
	    ofs += 2;
	}
	return true;
    },
    49: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.prev;
	return true;
    },
    50: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env;
	return true;
    },
    51: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.env.next;
	return true;
    },
    52: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	var ofs = c.cur_code.get (c.pc++);
	c.accu = c.env;
	while (ofs > 0) {
	    c.accu = c.accu.next;
	    ofs -= 2;
	}
	while (ofs < 0) {
	    c.accu = c.accu.prev;
	    ofs += 2;
	}
	return true;
    },
    53: function (vm, c) {
	c.accu = vm.data.get(c.cur_code.get (c.pc++));
	return true;
    },
    54: function (vm, c) {
	c.stack[--c.sp] = c.accu;      
	c.accu = vm.data.get(c.cur_code.get (c.pc++));
	return true;
    },
    55: function (vm, c) {
	c.accu = vm.data.get(c.cur_code.get (c.pc++));
	c.accu = c.accu.get(c.cur_code.get (c.pc++));
	return true;
    },
    56: function (vm, c) {
	c.stack[--c.sp] = c.accu;      
	c.accu = vm.data.get(c.cur_code.get (c.pc++));
	c.accu = c.accu.get(c.cur_code.get (c.pc++));
	return true;
    },
    57: function (vm, c) {
	vm.data.set(c.cur_code.get (c.pc++), c.accu);
	c.accu = 0;
	return true;
    },
    58: function (vm, c) {
	c.accu = ATOM;
	return true;
    },
    59: function (vm, c) {
	c.accu = (new Block (0, c.cur_code.get (c.pc++)));
	return true;
    },
    60: function (vm, c) {
	c.stack[--c.sp] = c.accu;      
	c.accu = ATOM;
	return true;
    },
    61: function (vm, c) {
	c.stack[--c.sp] = c.accu;      
	c.accu = (new Block (0, c.cur_code.get (c.pc++)));
	return true;
    },
    62: function (vm, c) {
	var size = c.cur_code.get (c.pc++);
	var tag = c.cur_code.get (c.pc++);
	var block = (new Block (size,  tag));
	block.set(0, c.accu);
	for (var i = 1;i < size;i++) {
	    block.set(i, c.stack[c.sp++]);
	}
	c.accu = block;
	return true;
    },
    63: function (vm, c) {
	var tag = c.cur_code.get (c.pc++);
	var block = (new Block (1,  tag));
	block.set(0,c.accu);
	c.accu = block;
	return true;
    },
    64: function (vm, c) {
	var tag = c.cur_code.get (c.pc++);
	var block = (new Block (2,  tag));
	block.set(0,c.accu);
	block.set(1,c.stack[c.sp]);
	c.sp += 1;
	c.accu = block;
	return true;
    },
    65: function (vm, c) {
	var tag = c.cur_code.get (c.pc++);
	var block = (new Block (3,  tag));
	block.set(0,c.accu);
	block.set(1,c.stack[c.sp]);
	block.set(2,c.stack[c.sp + 1]);
	c.sp += 2;
	c.accu = block;
	return true;
    },
    66: function (vm, c) {
	var size = c.cur_code.get (c.pc++);
	var block = (new Block (size,  254));
	block.set(0, c.accu.get (0));
	for (var i = 1;i < size;i++)
	    block.set(i, c.stack[c.sp++].get (0));
	c.accu = block;
	return true;
    },
    67: function (vm, c) {
	c.accu = c.accu.get(0);
	return true;
    },
    68: function (vm, c) {
	c.accu = c.accu.get(1);
	return true;
    },
    69: function (vm, c) {
	c.accu = c.accu.get(2);
	return true;
    },
    70: function (vm, c) {
	c.accu = c.accu.get(3);
	return true;
    },
    71: function (vm, c) {
	c.accu = c.accu.get(c.cur_code.get (c.pc++));
	return true;
    },
    72: function (vm, c) {
	c.accu = box_float(c.accu.get(c.cur_code.get (c.pc++)));
	return true;
    },
    73: function (vm, c) {
	c.accu.set(0,c.stack[c.sp++]);  c.accu = 0;
	return true;
    },
    74: function (vm, c) {
	c.accu.set(1,c.stack[c.sp++]);  c.accu = 0;
	return true;
    },
    75: function (vm, c) {
	c.accu.set(2,c.stack[c.sp++]);  c.accu = 0;
	return true;
    },
    76: function (vm, c) {
	c.accu.set(3,c.stack[c.sp++]);  c.accu = 0;
	return true;
    },
    77: function (vm, c) {
	c.accu.set(c.cur_code.get (c.pc++),c.stack[c.sp++]);
	c.accu = 0;
	return true;
    },
    78: function (vm, c) {
	c.accu.set(c.cur_code.get (c.pc++),c.stack[c.sp++].get (0));
	c.accu = 0;
	return true;
    },
    79: function (vm, c) {
	c.accu = c.accu.size;
	return true;
    },
    80: function (vm, c) {
	c.accu = c.accu.get(c.stack[c.sp++]);
	return true;
    },
    81: function (vm, c) {
	c.accu.set(c.stack[c.sp], c.stack[c.sp + 1]);
	c.sp += 2;
	return true;
    },
    82: function (vm, c) {
	c.accu = c.accu.get(c.stack[c.sp++]);
	return true;
    },
    83: function (vm, c) {
	c.accu.set(c.stack[c.sp], c.stack[c.sp + 1]);
	c.sp += 2;
	return true;
    },
    84: function (vm, c) {
	c.pc += c.cur_code.get (c.pc);
	return true;
    },
    85: function (vm, c) {
	if (c.accu != 0)
	    c.pc += c.cur_code.get (c.pc);
	else
	    c.pc++;
	return true;
    },
    86: function (vm, c) {
	if (c.accu == 0)
	    c.pc += c.cur_code.get (c.pc);
	else
	    c.pc++;
	return true;
    },
    87: function (vm, c) {
	var sizes = c.cur_code.get (c.pc++);
	if ((c.accu instanceof Block)) {
	    var index = c.accu.tag;
	    c.pc += c.cur_code.get (c.pc + (sizes & 0xFFFF) + index);
	} else {
	    var index = c.accu;
	    c.pc += c.cur_code.get (c.pc + index);
	}
	return true;
    },
    88: function (vm, c) {
	c.accu = (c.accu == 0?1:0);
	return true;
    },
    89: function (vm, c) {
	c.sp -= 4;
	c.stack[c.sp] =	c.cur_code.shift (c.pc + c.cur_code.get (c.pc));
	c.stack[c.sp + 1] = c.caml_trap_sp;
	c.stack[c.sp + 2] = c.env;
	c.stack[c.sp + 3] = c.extra_args;
	c.caml_trap_sp = c.sp;
	c.pc++;
	return true;
    },
    90: function (vm, c) {
	c.caml_trap_sp = c.stack[c.sp + 1];
	c.sp += 4;
	return true;
    },
    91: function (vm, c) {
	if (c.caml_trap_sp == -1) {
	    debug ('Fatal error: ' +
		      string_from_value (c.accu.get (0).get (0))
		      + (c.accu.size == 2
			 ?(' ' + repr (c.accu.get (1), 1000))
			 :''));
	    vm.thread_kill (c.pid);
	    return false;
	} else {
	    c.sp = c.caml_trap_sp;
	    c.cur_code = (c.stack[c.sp].tag == 247 ? c.stack[c.sp].get (0):c.stack[c.sp]);
	    c.pc = 0;
	    c.caml_trap_sp = c.stack[c.sp + 1];
	    c.env = c.stack[c.sp + 2];
	    c.extra_args = c.stack[c.sp + 3];
	    c.sp += 4;
	    return true;
	}
    },
    92: function (vm, c) {
	
	return true;
    },
    93: function (vm, c) {
	try {
	    var r = vm.prims [c.cur_code.get (c.pc)].call (vm, c.accu);
	    c.accu = r;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    94: function (vm, c) {
	try {
	    var a0 = c.accu;
	    var a1 = c.stack[c.sp];
	    var r = vm.prims [c.cur_code.get (c.pc)].call (vm, a0, a1);
	    c.accu = r;
	    c.sp += 1;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; c.sp += 1 ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    95: function (vm, c) {
	try {
	    var a0 = c.accu;
	    var a1 = c.stack[c.sp];
	    var a2 = c.stack[c.sp + 1];
	    var r =
	    vm.prims [c.cur_code.get (c.pc)].call (vm, a0, a1, a2);
	    c.accu = r;
	    c.sp += 2;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; c.sp += 2 ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    96: function (vm, c) {
	try {
	    var a0 = c.accu;
	    var a1 = c.stack[c.sp];
	    var a2 = c.stack[c.sp + 1];
	    var a3 = c.stack[c.sp + 2];
	    var r =
	    vm.prims [c.cur_code.get (c.pc)].call (vm, a0, a1, a2, a3);
	    c.accu = r;
	    c.sp += 3;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; c.sp += 3 ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    97: function (vm, c) {
	try {
	    var a0 = c.accu;
	    var a1 = c.stack[c.sp];
	    var a2 = c.stack[c.sp + 1];
	    var a3 = c.stack[c.sp + 2];
	    var a4 = c.stack[c.sp + 3];
	    var r =
	    vm.prims [c.cur_code.get (c.pc)].call (vm,a0,a1,a2,a3,a4);
	    c.accu = r;
	    c.sp += 4;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; c.sp += 4 ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    98: function (vm, c) {
	try {
	    var nargs = c.cur_code.get (c.pc++);
	    c.stack[--c.sp] = c.accu;
	    var args = new Array ();
	    for (var i = 0;i < nargs;i++) {
		args[i] = c.stack[c.sp + i];
	    }
	    var r =
	    vm.prims [c.cur_code.get (c.pc)].call (vm, args, nargs);
	    c.accu = r;
	    c.sp += nargs;
	    c.pc++;
	} catch (e) {
	    if (e == 0xEE1515EE) { c.pc++ ; c.sp += nargs ; return false; }
	    if (e != 0xEE1664EE) throw e;
	}
	return true;
    },
    99: function (vm, c) {
	c.accu = 0;
	return true;
    },
    100: function (vm, c) {
	c.accu = 1;
	return true;
    },
    101: function (vm, c) {
	c.accu = 2;
	return true;
    },
    102: function (vm, c) {
	c.accu = 3;
	return true;
    },
    103: function (vm, c) {
	c.accu = c.cur_code.get (c.pc); c.pc++;
	return true;
    },
    104: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = 0;
	return true;
    },
    105: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = 1;
	return true;
    },
    106: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = 2;
	return true;
    },
    107: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = 3;
	return true;
    },
    108: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.cur_code.get (c.pc); c.pc++;
	return true;
    },
    109: function (vm, c) {
	c.accu = -c.accu;
	return true;
    },
    110: function (vm, c) {
	c.accu = ((c.accu + c.stack[c.sp++]) | 0);
	return true;
    },
    111: function (vm, c) {
	c.accu = ((c.accu - c.stack[c.sp++]) | 0);
	return true;
    },
    112: function (vm, c) {
	c.accu = ((c.accu * c.stack[c.sp++]) | 0);
	return true;
    },
    113: function (vm, c) {
	c.accu = ((c.accu / c.stack[c.sp++]) | 0);
	return true;
    },
    114: function (vm, c) {
	c.accu = ((c.accu % c.stack[c.sp++]) | 0);
	return true;
    },
    115: function (vm, c) {
	c.accu = c.accu & c.stack[c.sp++];
	return true;
    },
    116: function (vm, c) {
	c.accu = c.accu | c.stack[c.sp++];
	return true;
    },
    117: function (vm, c) {
	c.accu = c.accu ^ c.stack[c.sp++];
	return true;
    },
    118: function (vm, c) {
	c.accu = ((c.accu << c.stack[c.sp++]) | 0);
	return true;
    },
    119: function (vm, c) {
	c.accu = ((c.accu >>> c.stack[c.sp++]) | 0);
	return true;
    },
    120: function (vm, c) {
	c.accu = ((c.accu >> c.stack[c.sp++]) | 0);
	return true;
    },
    121: function (vm, c) {
	c.accu = (c.accu == c.stack[c.sp++]?1:0);
	return true;
    },
    122: function (vm, c) {
	c.accu = (c.accu != c.stack[c.sp++]?1:0);
	return true;
    },
    123: function (vm, c) {
	c.accu = (c.accu < c.stack[c.sp++]?1:0);
	return true;
    },
    124: function (vm, c) {
	c.accu = (c.accu <= c.stack[c.sp++]?1:0);
	return true;
    },
    125: function (vm, c) {
	c.accu = (c.accu > c.stack[c.sp++]?1:0);
	return true;
    },
    126: function (vm, c) {
	c.accu = (c.accu >= c.stack[c.sp++]?1:0);
	return true;
    },
    127: function (vm, c) {
	c.accu += c.cur_code.get (c.pc);
	c.pc++;
	return true;
    },
    128: function (vm, c) {
	c.accu.set (0, c.accu.get (0) + c.cur_code.get (c.pc));
	c.accu = 0;
	c.pc++;
	return true;
    },
    129: function (vm, c) {
	c.accu = (!(c.accu instanceof Block));
	return true;
    },
    130: function (vm, c) {
	c.accu = c.stack[c.sp].get (0).get (c.accu);
	return true;
    },
    131: function (vm, c) {
	if (c.cur_code.get (c.pc++) == c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    132: function (vm, c) {
	if (c.cur_code.get (c.pc++) != c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    133: function (vm, c) {
	if (c.cur_code.get (c.pc++) < c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    134: function (vm, c) {
	if (c.cur_code.get (c.pc++) <= c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    135: function (vm, c) {
	if (c.cur_code.get (c.pc++) > c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    136: function (vm, c) {
	if (c.cur_code.get (c.pc++) >= c.accu) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    137: function (vm, c) {
	c.accu = (ult (c.accu, c.stack[c.sp++])?1:0);
	return true;
    },
    138: function (vm, c) {
	c.accu = (!ult (c.accu, c.stack[c.sp++])?1:0);
	return true;
    },
    139: function (vm, c) {
	if (ult(c.cur_code.get (c.pc++), c.accu)) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    140: function (vm, c) {
	if (!ult(c.cur_code.get (c.pc++), c.accu)) {
	    c.pc += c.cur_code.get (c.pc);
	} else {
	    c.pc++;
	}
	return true;
    },
    141: function (vm, c) {
	c.stack[--c.sp] = c.accu;
	c.accu = c.cur_code.get (c.pc);
	c.pc += 2;
	var meths = c.stack[c.sp].get (0);
	var li = 3;
	var hi = meths.get (0) * 2 + 1;
	while (li < hi) {
	    var mi = ((li + hi) >> 1) | 1;
	    if (c.accu < meths.get (mi))
	 	hi = mi - 2;
	    else
	 	li = mi;
	} 
	c.accu = meths.get (li - 1);
	return true;
    },
    142: function (vm, c) {
	var meths = c.stack[c.sp].get (0);
	var li = 3;
	var hi = meths.get (0) * 2 + 1;
	while (li < hi) {
	    var mi = ((li + hi) >> 1) | 1;
	    if (c.accu < meths.get (mi))
	 	hi = mi - 2;
	    else
	 	li = mi;
	} 
	c.accu = meths.get (li - 1);
	return true;
    },
    143: function (vm, c) {
	vm.thread_kill (c.pid);
	return false;
    },
    144: function (vm, c) {
	
	vm.thread_kill (c.pid);
	return false;
    },
    145: function (vm, c) {
	
	vm.thread_kill (c.pid);
	return false;
    }
};


// VM.prototype.step = function () {
//     if (this.ctx == null) return false;
//     var c = this.ctx;
//     if (c.status == 43) {
// 	try {
// 	    if (c.iocontinuation ()) {
// 		c.status = 44;
// 		c.accu = c.ioresult;
// 		return true;
// 	    } else {
// 		c.status = 45;
// 		return false;
// 	    }
// 	} catch (e) {
// 	    if (e != 0xEE1664EE)
// 		throw e;
// 	    else
// 		c.status = c.oldstatus;
// 	}
//     } else {
// 	if (c.status != 44) {
// 	    
// 	    return false;
// 	}
//     }
//     return i_tbl [c.cur_code.get (c.pc++)] (this, c);
// }



VM.prototype.raise = function (e) {
    with (this.ctx) {
	accu = e;
	if (caml_trap_sp == -1) {
	    throw new Error ("Fatal error: " +
			     string_from_value (accu.get(0).get(0))
			     + (accu.size == 2
				?(" " + repr (accu.get (1), 1000))
				:""));
	    this.thread_kill (pid);
	} else {
	    sp = caml_trap_sp;
	    cur_code = (stack[sp].tag == 247 ? stack[sp].get (0):stack[sp]);
	    pc = 0;
	    caml_trap_sp = stack[sp + 1];
	    env = stack[sp + 2];
	    extra_args = stack[sp + 3];
	    sp += 4;
	    throw 0xEE1664EE;
	}
    }
}

VM.prototype.run = function () {
    if (this.status != 667) {
	this.status = 667;
	var vm = this;
	function sched_run () {
	    for (var i = 0;i < 800000;i++)
		{						    if (vm.ctx == null) break;						    var c = vm.ctx;							    if (c.status == 43) {							try {									    c.accu = c.iocontinuation ();					    c.status = 44;							    continue;								} catch (e) {								    if (e == 0xEE1515EE) break;					    if (e != 0xEE1664EE) throw e;					    break;								}								    } else {									if (c.status != 44)							    					    break;							    }									    if (! i_tbl [c.cur_code.get (c.pc++)] (vm, c)) break;               };
	    if (vm.thread_yield ())
		window.setTimeout (sched_run, 0);
	    else
		vm.status = 668;
	}
	sched_run ();
    }
}

VM.prototype.run = function () {
    if (this.status != 667) {
	this.status = 667;
	var vm = this;
	function sched_run () {
	    var t1 = (new Date ()).getTime ();
	    for (var i = 0;i < 50;i++) {
		for (var j = 0;j < 800000;j++)
		    {						    if (vm.ctx == null) break;						    var c = vm.ctx;							    if (c.status == 43) {							try {									    c.accu = c.iocontinuation ();					    c.status = 44;							    continue;								} catch (e) {								    if (e == 0xEE1515EE) break;					    if (e != 0xEE1664EE) throw e;					    break;								}								    } else {									if (c.status != 44)							    					    break;							    }									    if (! i_tbl [c.cur_code.get (c.pc++)] (vm, c)) break;               }
		var t2 = (new Date ()).getTime ();
		if (!vm.thread_yield ()) {
		    vm.status = 668;
		    break;
		}
		if (t2 - t1 > 2000) {
		    t1 = t2;
		    break;
		}
	    }
	    if (vm.status != 668)
		window.setTimeout (sched_run, 0);
	}
	sched_run ();
    }
}



VM.prototype.thread_notify_all = function (res) {
    var p = this.ctx;
    do {
	if (p.status == 45 && p.waiting_for == res) {
	    p.status = 43;
	    break;
	}
	p = p.n_ctx;
    } while (p != this.ctx);
    if (this.status == 668)
	this.run ();
}

VM.prototype.thread_notify_one = function (res) {
    var p = this.ctx;
    do {
	if (p.status == 45 && p.waiting_for == res) {
	    p.status = 43;
	    break;
	}
	p = p.n_ctx;
    } while (p != this.ctx);
    if (this.status == 668)
	this.run ();
}

VM.prototype.thread_wait = function (res, cont) {
    this.ctx.waiting_for = res;
    this.ctx.status = 45;
    this.ctx.iocontinuation = cont;
    //    this.thread_yield ();
    throw 0xEE1515EE;
}

VM.prototype.thread_yield = function () {
    if (this.ctx == null)
	return false;
    var p = this.ctx.n_ctx;
    do {
	if (p.status <= 44) {
	    this.ctx = p;
	    return true;
	}
	p = p.n_ctx;
    } while (p != this.ctx);
    return false;
}

VM.prototype.thread_new = function (clos, arg1) {
    var t = {
	cur_code : clos.get (0),
	pc : 0,
	sp : 0,
	caml_trap_sp : -1,
	accu : ((arg1 == null) ? 0 : arg1),
	stack : new Array (),
 	env : clos,
	extra_args : 0,
	status : 44,
	pid : this.max_pid
    };
    if (this.ctx == null) {
	t.n_ctx = t;
	t.p_ctx = t;
	this.ctx = t;
    } else {
	t.n_ctx = this.ctx.n_ctx;
	t.p_ctx = this.ctx;
	this.ctx.n_ctx.p_ctx = t;
	this.ctx.n_ctx = t;
    }
    return this.max_pid++;
}

VM.prototype.thread_kill = function (pid) {
    var p = this.ctx;
    do {
	if (p.pid == pid) {
	    p.p_ctx.n_ctx = p.n_ctx;
	    p.n_ctx.p_ctx = p.p_ctx;
	    if (this.ctx == p) {
		if (p == p.n_ctx) {
		    this.ctx = null;
		} else {
		    this.ctx = p.n_ctx;
		}
	    }
	    return;
	}
	p = p.n_ctx;
    } while (p != this.ctx);
}

VM.prototype.thread_delay = function (millis) {
    function resume (vm, t) {
	return function () {
	    t.status = 44;
	    if (vm.status == 668)
		vm.run ();
	}
    }
    this.ctx.status = 46;
    window.setTimeout (resume (this, this.ctx), millis);
}

VM.prototype.thread_wakeup = function (pid) {
    var p = this.ctx;
    do {
	if (p.pid == pid) {
	    p.status = 44;
	    if (this.status == 668)
		this.run ();
	}
	p = p.n_ctx;
    } while (p != this.ctx);
}










var OUT_OF_MEMORY_EXN = 0;               
var SYS_ERROR_EXN = 1;                   
var FAILURE_EXN = 2;                     
var INVALID_EXN = 3;                     
var END_OF_FILE_EXN = 4;                 
var ZERO_DIVIDE_EXN = 5;                 
var NOT_FOUND_EXN = 6;                   
var MATCH_FAILURE_EXN = 7;               
var STACK_OVERFLOW_EXN = 8;              
var SYS_BLOCKED_IO = 9;                  
var ASSERT_FAILURE_EXN = 10;             
var UNDEFINED_RECURSIVE_MODULE_EXN = 11; 

VM.prototype.raise_constant = function(tag) {
    var b = (new Block (1, 0));
    b.set(0, this.data.get (tag));
    this.raise (b);
}

VM.prototype.raise_with_arg = function (tag,val) {
    var b = (new Block (2, 0));
    b.set(0,this.data.get (tag));
    b.set(1,val);
    this.raise (b);
}

VM.prototype.raise_with_string = function (tag, msg) {
    var b = (new Block (2, 0));
    b.set(0,this.data.get (tag));
    b.set(1,value_from_string (msg));
    this.raise (b);
}

VM.prototype.invalid_arg = function (msg) {
    this.raise_with_string (INVALID_EXN, msg);
}

VM.prototype.failwith = function (msg) {
    this.raise_with_string (FAILURE_EXN, msg);
}

VM.prototype.array_bound_error = function () {
    this.invalid_arg ("index out of bounds");
}

VM.prototype.raise_end_of_file = function () {
    this.raise_constant (END_OF_FILE_EXN);
}

var i_tbl_cb = []
for (i = 0;i <= 255; i++) {
    i_tbl_cb[i] = i_tbl[i];
}
i_tbl_cb[91] = function (vm, c) {
    if (c.caml_trap_sp == -1) {
	
	throw ([ 987654321 , c.accu ]);
    } else {
	c.sp = c.caml_trap_sp;
	c.cur_code = (c.stack[c.sp].tag == 247 ? c.stack[c.sp].get (0):c.stack[c.sp]);
	c.pc = 0;
	c.caml_trap_sp = c.stack[c.sp + 1];
	c.env = c.stack[c.sp + 2];
	c.extra_args = c.stack[c.sp + 3];
	c.sp += 4;
	return true;
    }
}

VM.prototype.callback = function (clos, args) {
    var code = (new Block (7,  0));
    var ctx = {
	cur_code : code,
	pc : 0,
	sp : 0,
	caml_trap_sp : -1,
	accu : 0,
	stack : new Array (),
 	env : (new Block (0,  0)),
	extra_args : 0,
	status : 44,
	pid : 0
    } ;
    var narg = args.length;
    var octx = this.ctx ;
    this.ctx = ctx;

    ctx.sp -= narg + 4;
    for (i = 0; i < narg; i++)
	ctx.stack[ctx.sp + i] = args[i];
    
    ctx.stack[ctx.sp + narg] = code.shift (4);
    ctx.stack[ctx.sp + narg + 1] = 0;
    ctx.stack[ctx.sp + narg + 2] = 0;
    ctx.stack[ctx.sp + narg + 3] = clos;
    code.set (0, 8);
    code.set (1, narg + 3);
    code.set (2, 32);
    code.set (3, narg);
    code.set (4, 19);
    code.set (5, 1);
    code.set (6, 143);

    try {
	while (ctx.cur_code.get (ctx.pc) != 143) {
	    if (! i_tbl_cb [ctx.cur_code.get (ctx.pc++)] (this, ctx)) {
		this.ctx = octx;
		this.failwith ("blocking functions in callbacks not supported");
	    }
	}
    } catch (e) {
	this.ctx = octx;
	if (e[0] == 987654321) {
	    this.raise (e[1]);
	} else {
	    throw e;
	}
    }
    
    var r = ctx.accu;
    this.ctx = octx;
    return r;
}

function exec_caml (url) {
    var argv = [];
    for (var i = 0;i < arguments.length - 1;i++)
	argv[i] = arguments[i+1].toString();
    var vm = new VM(url, argv) ;
    vm.run ();
    return vm ;
}