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jsexec.cs
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jsexec.cs
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/* ***** BEGIN LICENSE BLOCK *****
* vim: set ts=4 sw=4 et tw=80:
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Narcissus JavaScript engine.
*
* The Initial Developer of the Original Code is
* Brendan Eich <brendan@mozilla.org>.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Narcissus - JS implemented in JS.
*
* Execution of parse trees.
*
* Standard classes except for eval, Function, Array, and String are borrowed
* from the host JS environment. Function is metacircular. Array and String
* are reflected via wrapping the corresponding native constructor and adding
* an extra level of prototype-based delegation.
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
namespace pygmalion
{
public class BreakException : Exception
{
public BreakException() { }
}
public class ContinueException : Exception
{
public ContinueException() { }
}
public class ThrownException : Exception
{
public readonly object Value;
public ThrownException(object value) { Value = value; }
}
public class ReturnException : Exception
{
}
public class FalseReturn : Exception
{
}
public class ScriptException : Exception
{
Node n;
public override string Message
{
get
{
return string.Format("{0}\nWhile Evaluating {1} at {2}:{3}", base.Message, Node.ToString(false, n, ""), n.filename, n.lineno);
}
}
internal ScriptException(string message, Node n, Exception inner) : base(message, inner)
{
this.n = n;
}
}
public class jsexec
{
public bool TraceExec = false;
ObjectFun StaticObjectFun;
StringFun StaticStringFun;
BooleanFun StaticBooleanFun;
ArrayFun StaticArrayFun;
NumberFun StaticNumberFun;
FunctionFun StaticFunctionFun;
NumberObject StaticNumberObject;
JSObject DatePrototype;
public readonly ExecutionContext GLOBAL = new ExecutionContext();
void CollectArguments(JSObjectBase v, Node n, ref int k, ExecutionContext x)
{
int i;
object u;
if (n.type == TokenType.LIST || n.type == TokenType.COMMA)
{
for (i = 0; i < n.Count; i++)
CollectArguments(v, n[i], ref k, x);
}
if (!(n.type == TokenType.LIST || n.type == TokenType.COMMA))
{
u = Reference.GetValue(GLOBAL, execute(n, x));
v.SetItem(GLOBAL, k.ToString(), new JSSimpleProperty(k.ToString(), u));
k++;
}
}
internal object apply(bool callMe, JSObjectBase f, object t, JSObjectBase args, ExecutionContext x)
{
// Curse ECMA again!
if (t == JSUndefined.Undefined || t == null)
t = x;
if (!(t is JSObjectBase))
t = JSObject.ToObject(GLOBAL, t);
if (args == JSUndefined.Undefined || args == null)
{
args = new JSObject();
args.SetItem(GLOBAL, "length", new JSSimpleProperty("length", 0.0, false, false, true));
}
else if (args is JSArray)
{
var vv = new JSObject();
int ii, jj;
for (ii = 0, jj = (int)JSObject.ToNumber(GLOBAL, args.GetItem(GLOBAL, "length").GetValue(GLOBAL)); ii < jj; ii++)
vv.SetItem(GLOBAL, ii.ToString(), new JSSimpleProperty(ii.ToString(), args.GetItem(GLOBAL, ii.ToString()).GetValue(GLOBAL), false, false, true));
vv.SetItem(GLOBAL, "length", new JSSimpleProperty("length", (double)ii, false, false, true));
args = vv;
}
if (callMe)
return f.Call(GLOBAL, t, args, x);
else
return f.Construct(GLOBAL, args, x);
}
internal object Add(object res1, object res2)
{
object v;
if (res1 is string || res2 is string)
{
string s1 = res1 != null ? JSObject.ToPrimitive(GLOBAL, res1) : "";
string s2 = res2 != null ? JSObject.ToPrimitive(GLOBAL, res2) : "";
v = s1 + s2;
}
else if (res1 is double || res2 is double || res1 is bool || res2 is bool)
{
v = (double)(JSObject.ToNumber(GLOBAL, res1) + JSObject.ToNumber(GLOBAL, res2));
}
else
{
v = JSObject.ToPrimitive(GLOBAL, res1) + JSObject.ToPrimitive(GLOBAL, res2);
}
return v;
}
internal object execute(Node n, ExecutionContext x) {
int i, j;
List<Node> aNode;
ExecutionContext sEcon;
JSObjectBase jaa;
JSObjectBase f, tVal;
object r, s, u = null, v = null;
Node tNode = null, rNode = null, uNode = null;
bool matchDefault = false;
bool switchLoop;
if (TraceExec)
System.Console.Write("Execute[" + n.ToString() + " => ");
try
{
switch (n.type)
{
case TokenType.Function:
if (n.functionForm != StatementForm.DECLARED_FORM)
{
if (n.name == null || n.name == "" || n.functionForm == StatementForm.STATEMENT_FORM)
{
v = new FunctionObject(GLOBAL, n, x.scope);
if (n.functionForm == StatementForm.STATEMENT_FORM)
x.scope.jobject.SetItem(GLOBAL, n.name, new JSSimpleProperty(n.name, v));
}
else
{
tVal = new JSObject();
ExecutionContext tmp = x.scope;
x.scope = new ExecutionContext();
x.scope.jobject = tVal;
x.scope.parent = tmp;
try
{
v = new FunctionObject(GLOBAL, n, x.scope);
tVal.SetItem(GLOBAL, n.name, new JSSimpleProperty(n.name, v, true, true));
}
finally
{
x.scope = x.scope.parent;
}
}
}
break;
case TokenType.SCRIPT:
tVal = x.scope.jobject;
aNode = n.funDecls;
for (i = 0, j = aNode.Count; i < j; i++)
{
s = aNode[i].name;
f = new FunctionObject(GLOBAL, aNode[i], x.scope);
tVal.SetItem(GLOBAL, s.ToString(), new JSSimpleProperty(s.ToString(), f, x.type != CodeType.EVAL_CODE));
}
aNode = n.varDecls;
for (i = 0, j = aNode.Count; i < j; i++)
{
uNode = aNode[i];
s = uNode.name;
if (uNode.readOnly && tVal.HasOwnProperty(s.ToString()))
{
throw new TypeError
("Redeclaration of const " + s, uNode.filename, uNode.lineno);
}
if (uNode.readOnly || !tVal.HasOwnProperty(s.ToString()))
{
tVal.SetItem(GLOBAL, s.ToString(), new JSSimpleProperty(s.ToString(), JSUndefined.Undefined, x.type != CodeType.EVAL_CODE, uNode.readOnly));
}
}
// FALL THROUGH
for (i = 0, j = n.Count; i < j; i++)
execute(n[i], x);
break;
case TokenType.BLOCK:
for (i = 0, j = n.Count; i < j; i++)
execute(n[i], x);
break;
case TokenType.If:
if (JSObject.ToBool(GLOBAL, execute(n.condition, x)))
execute(n.thenPart, x);
else if (n.elsePart != null)
execute(n.elsePart, x);
break;
case TokenType.Switch:
s = execute(n.discriminant, x);
aNode = n.cases;
Node tt;
switchLoop = false;
for (i = 0, j = aNode.Count; ; i++)
{
if (i == j)
{
if (n.defaultIndex >= 0)
{
i = n.defaultIndex - 1; // no case matched, do default
matchDefault = true;
continue;
}
break; // no default, exit switch_loop
}
tt = aNode[i]; // next case (might be default!)
if (tt.type == TokenType.Case)
{
u = Reference.GetValue(GLOBAL, execute(tt.caseLabel, x));
}
else
{
if (!matchDefault) // not defaulting, skip for now
continue;
u = s; // force match to do default
}
if (object.Equals(u, s))
{
for (; ; )
{ // this loop exits switch_loop
if (tt.statements != null)
{
try
{
execute(tt.statements, x);
}
catch (BreakException)
{
if (x.target == n)
{
switchLoop = true;
break;
}
else
{
throw;
}
}
}
if (++i == j)
{
switchLoop = true;
break;
}
tNode = aNode[i];
}
// NOT REACHED
}
if (switchLoop) break;
}
break;
case TokenType.For:
if (n.setup != null)
Reference.GetValue(GLOBAL, execute(n.setup, x));
// FALL THROUGH
while (n.condition == null ||
JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute(n.condition, x))))
{
try
{
execute(n.body, x);
}
catch (BreakException)
{
if (x.target == n)
break;
throw;
}
catch (ContinueException)
{
if (x.target == n)
{
if (n.update != null)
Reference.GetValue(GLOBAL, execute(n.update, x));
if (n.condition != null && !JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute(n.condition, x))))
break;
else
continue;
}
throw;
}
if (n.update != null)
Reference.GetValue(GLOBAL, execute(n.update, x));
}
break;
case TokenType.While:
while (n.condition != null ||
JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute(n.condition, x))))
{
try
{
execute(n.body, x);
}
catch (BreakException)
{
if (x.target == n)
break;
throw;
}
catch (ContinueException)
{
if (x.target == n)
continue;
throw;
}
if (n.update != null)
Reference.GetValue(GLOBAL, execute(n.update, x));
}
break;
case TokenType.FOR_IN:
uNode = n.varDecl;
if (uNode != null)
execute(uNode, x);
rNode = n.iterator;
v = Reference.GetValue(GLOBAL, execute(n.jobject, x));
// ECMA deviation to track extant browser JS implementation behavior.
tVal = JSObject.ToObject(GLOBAL, v);
i = 0;
jaa = new JSArray(GLOBAL);
foreach (string ii in tVal.Properties)
{
string istr = (i++).ToString();
jaa.SetItem(GLOBAL, istr, new JSSimpleProperty(istr, ii));
}
for (j = i, i = 0; i < j; i++)
{
Reference.PutValue(GLOBAL, execute(rNode, x), jaa.GetItem(GLOBAL, i.ToString()).GetValue(GLOBAL));
try
{
execute(n.body, x);
}
catch (BreakException)
{
if (x.target != n)
break;
throw;
}
catch (ContinueException)
{
if (x.target != n)
continue;
throw;
}
}
break;
case TokenType.Do:
do
{
try
{
execute(n.body, x);
}
catch (BreakException)
{
if (x.target != n)
break;
throw;
}
catch (ContinueException)
{
if (x.target != n)
continue;
throw;
}
} while (JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute(n.condition, x))));
break;
case TokenType.Break:
x.target = n.target;
throw new BreakException();
case TokenType.Continue:
x.target = ((Node)n).target;
throw new ContinueException();
case TokenType.Try:
try
{
execute(n.tryBlock, x);
}
catch (Exception exn)
{
ThrownException ex = exn as ThrownException;
object e;
if (ex != null) e = ex.Value; else e = new JSInstanceWrapper(GLOBAL, exn);
j = n.catchClauses.Count;
x.result = JSUndefined.Undefined;
for (i = 0; ; i++)
{
if (i == j)
{
throw;
}
tNode = n.catchClauses[i];
ExecutionContext xscope = new ExecutionContext();
xscope.jobject = new JSObject();
xscope.jobject.SetItem(GLOBAL, tNode.varName, new JSSimpleProperty(tNode.varName, e, false, false, true));
xscope.parent = x.scope;
x.scope = xscope;
try
{
if (tNode.guard != null && !JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute(tNode.guard, x))))
continue;
execute(tNode.block, x);
break;
}
finally
{
x.scope = x.scope.parent;
}
}
}
finally
{
if (n.finallyBlock != null)
execute(n.finallyBlock, x);
}
break;
case TokenType.Throw:
x.result = Reference.GetValue(GLOBAL, execute(n.exception, x));
throw new ThrownException((double)(int)TokenType.Throw);
case TokenType.Return:
x.result = Reference.GetValue(GLOBAL, execute(n.valueNode, x));
throw new ReturnException();
case TokenType.With:
{
r = execute(n.jobject, x);
tVal = JSObject.ToObject(GLOBAL, Reference.GetValue(GLOBAL, r));
ExecutionContext tmp = x.scope;
x.scope = new ExecutionContext();
x.scope.jobject = tVal;
x.scope.parent = tmp;
try
{
execute(n.body, x);
}
finally
{
x.scope = x.scope.parent;
}
}
break;
case TokenType.Var:
case TokenType.Const:
for (i = 0, j = n.Count; i < j; i++)
{
uNode = n[i].initializer;
if (uNode == null)
continue;
string identName = n[i].name;
for (sEcon = x.scope; sEcon != null; sEcon = sEcon.parent)
{
if (sEcon.jobject.HasOwnProperty(identName))
break;
}
u = Reference.GetValue(GLOBAL, execute(uNode, x));
if (n.type == TokenType.Const)
sEcon.jobject.SetItem(GLOBAL, identName, new JSSimpleProperty(identName, u, true, true, false));
else
sEcon.jobject.SetItem(GLOBAL, identName, new JSSimpleProperty(identName, u));
}
break;
case TokenType.Debugger:
throw new Exception("NYI: debugger");
case TokenType.SEMICOLON:
if (n.expression != null)
x.result = Reference.GetValue(GLOBAL, execute(n.expression, x));
break;
case TokenType.LABEL:
try
{
execute(n.statement, x);
}
catch (BreakException)
{
if (x.target != n)
throw;
}
break;
case TokenType.COMMA:
for (i = 0, j = n.Count; i < j; i++)
v = Reference.GetValue(GLOBAL, execute(n[i], x));
break;
case TokenType.ASSIGN:
r = execute(n[0], x);
TokenType tok = jsdefs.tokenWords[n.value.ToString()];
v = Reference.GetValue(GLOBAL, execute(n[1], x));
if (tok != TokenType.ASSIGN)
{
u = Reference.GetValue(GLOBAL, r);
if (tok != TokenType.PLUS)
{
double ld = JSObject.ToNumber(GLOBAL, u), bd = JSObject.ToNumber(GLOBAL, v);
long laa = (long)ld, bb = (long)bd;
int bint = (int)bb;
switch (tok)
{
case TokenType.BITWISE_OR: ld = laa | bb; break;
case TokenType.BITWISE_XOR: ld = laa ^ bb; break;
case TokenType.BITWISE_AND: ld = laa & bb; break;
case TokenType.LSH: ld = laa << bint; break;
case TokenType.RSH: ld = laa >> bint; break;
case TokenType.URSH: ld = ((uint)laa) >> bint; break;
case TokenType.MINUS: ld = ld - bd; break;
case TokenType.MUL: ld = ld * bd; break;
case TokenType.DIV: ld = ld / bd; break;
case TokenType.MOD: ld = laa % bb; break;
}
v = ld;
}
else
{
v = Add(u, v);
}
}
Reference.PutValue(GLOBAL, r, v);
break;
case TokenType.HOOK:
{
object res1 = Reference.GetValue(GLOBAL, execute(n[0], x));
v = JSObject.ToBool(GLOBAL, res1) ? Reference.GetValue(GLOBAL, execute(n[1], x))
: Reference.GetValue(GLOBAL, execute(n[2], x));
}
break;
case TokenType.OR:
{
object res1 = Reference.GetValue(GLOBAL, execute(n[0], x));
v = JSObject.ToBool(GLOBAL, res1) ? res1 : Reference.GetValue(GLOBAL, execute(n[1], x));
}
break;
case TokenType.AND:
{
object res1 = Reference.GetValue(GLOBAL, execute(n[0], x));
v = JSObject.ToBool(GLOBAL, res1) ? Reference.GetValue(GLOBAL, execute(n[1], x)) : res1;
}
break;
case TokenType.BITWISE_OR:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) | (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.BITWISE_XOR:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) ^ (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.BITWISE_AND:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) & (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.EQ:
v = Reference.GetValue(GLOBAL, execute(n[0], x));
u = Reference.GetValue(GLOBAL, execute(n[1], x));
if ((v == null || v == JSUndefined.Undefined) && (u == null || u == JSUndefined.Undefined))
v = true;
else
v = JSObject.CompareTo(GLOBAL, v, u) == 0;
break;
case TokenType.NE:
if (((u == null || u is JSUndefined) && (v != null && !(v is JSUndefined))) ||
((v == null || v is JSUndefined) && (u != null && !(u is JSUndefined))))
return true;
v = JSObject.CompareTo(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x))) != 0;
break;
case TokenType.STRICT_EQ:
v = Object.ReferenceEquals(Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.STRICT_NE:
v = !Object.ReferenceEquals(Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.LT:
v = JSObject.CompareTo(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x))) == -1;
break;
case TokenType.LE:
v = JSObject.CompareTo(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x))) != 1;
break;
case TokenType.GE:
v = JSObject.CompareTo(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x))) != -1;
break;
case TokenType.GT:
v = JSObject.CompareTo(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x))) == 1;
break;
case TokenType.In:
v = execute(n[1], x);
tVal = Reference.GetValue(GLOBAL, v) as JSObjectBase;
if (tVal == null) throw new TypeError("invalid 'in' operand " + v.ToString());
v = tVal.HasProperty(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x)).ToString());
break;
case TokenType.Instanceof:
u = Reference.GetValue(GLOBAL, execute(n[0], x));
tVal = Reference.GetValue(GLOBAL, execute(n[1], x)) as JSObjectBase;
if (tVal == null) throw new TypeError("Not an object in instanceof");
v = tVal.HasInstance(GLOBAL, u);
break;
case TokenType.LSH:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) << (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.RSH:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) >> (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.URSH:
v = (double)((int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) >> (int)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x))));
break;
case TokenType.PLUS:
v = Add(Reference.GetValue(GLOBAL, execute(n[0], x)), Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.MINUS:
v = JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) - JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.MUL:
v = JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) * JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.DIV:
v = JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) / JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.MOD:
v = JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[0], x))) % (long)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute(n[1], x)));
break;
case TokenType.Delete:
{
u = execute((Node)n[0], x);
Reference refer = u as Reference;
if (refer != null)
{
v = refer.GetBase().Delete(refer.GetPropertyName());
}
}
break;
case TokenType.Void:
Reference.GetValue(GLOBAL, execute((Node)n[0], x));
v = JSUndefined.Undefined;
break;
case TokenType.Typeof:
u = execute((Node)n[0], x);
if (u is Reference)
{
Reference refer = (Reference)u;
if (refer.GetBase() == null)
{
v = JSUndefined.Undefined;
break;
}
u = Reference.GetValue(GLOBAL, refer);
}
v = JSObject.Typeof(u).ToLower();
break;
case TokenType.NOT:
v = !JSObject.ToBool(GLOBAL, Reference.GetValue(GLOBAL, execute((Node)n[0], x)));
break;
case TokenType.BITWISE_NOT:
v = (double)~(long)JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute((Node)n[0], x)));
break;
case TokenType.UNARY_PLUS:
v = JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute((Node)n[0], x)));
break;
case TokenType.UNARY_MINUS:
v = -JSObject.ToNumber(GLOBAL, Reference.GetValue(GLOBAL, execute((Node)n[0], x)));
break;
case TokenType.INCREMENT:
case TokenType.DECREMENT:
{
object t = execute(n[0], x);
u = Reference.GetValue(GLOBAL, t);
if (n.postfix)
v = u;
Reference.PutValue(GLOBAL, t, n.type == TokenType.INCREMENT ? JSObject.ToNumber(GLOBAL, u) + 1 : JSObject.ToNumber(GLOBAL, u) - 1);
if (!n.postfix)
v = u;
}
break;
case TokenType.DOT:
{
r = execute((Node)n[0], x);
object t = Reference.GetValue(GLOBAL, r);
u = n[1].value;
v = new Reference(JSObject.ToObject(GLOBAL, t), u.ToString());
}
break;
case TokenType.INDEX:
{
r = execute(n[0], x);
object t = Reference.GetValue(GLOBAL, r);
u = Reference.GetValue(GLOBAL, execute(n[1], x));
v = new Reference(JSObject.ToObject(GLOBAL, t), u.ToString());
}
break;
case TokenType.LIST:
// Curse ECMA for specifying that arguments is not an Array object!
tVal = new JSObject();
int k = 0;
CollectArguments(tVal, n, ref k, x);
tVal.SetItem(GLOBAL, "length", new JSSimpleProperty("length", (double)k));
v = tVal;
break;
case TokenType.CALL:
{
r = execute(n[0], x);
JSObjectBase args = (JSObjectBase)execute(n[1], x);
JSObjectBase fun = (JSObjectBase)Reference.GetValue(GLOBAL, r);
tVal = (r is Reference) ? ((Reference)r).GetBase() : null;
if (tVal is Activation)
tVal = null;
try
{
v = apply(true, fun, tVal, args, x);
}
catch (TypeError te)
{
if (r is Reference)
throw new TypeError(((Reference)r).GetPropertyName() + ": " + te.Message);
else
throw;
}
}
break;
case TokenType.New:
case TokenType.NEW_WITH_ARGS:
{
r = execute(n[0], x);
JSObjectBase fun = (JSObjectBase)Reference.GetValue(GLOBAL, r);
if (n.type == TokenType.New)
{
jaa = new JSArray(GLOBAL);
}
else
{
jaa = (JSObjectBase)execute(n[1], x);
}
v = fun.Construct(GLOBAL, jaa, x);
}
break;
case TokenType.ARRAY_INIT:
JSArray jaa1 = new JSArray(GLOBAL);
for (i = 0, j = n.Count; i < j; i++)
{
if (n[i] != null)
jaa1[i] = new JSSimpleProperty(i.ToString(), Reference.GetValue(GLOBAL, execute(n[i], x)));
}
jaa1.length = j;
v = jaa1;
break;
case TokenType.OBJECT_INIT:
tVal = new JSObject();
for (i = 0, j = n.Count; i < j; i++)
{
Node tx = n[i];
if (tx.type == TokenType.PROPERTY_INIT)
{
tVal.SetItem(GLOBAL, tx[0].value.ToString(),
new JSSimpleProperty
(tx[0].value.ToString(),
Reference.GetValue(GLOBAL, execute(tx[1], x))));
}
else
{
f = new FunctionObject(GLOBAL, tx, x.scope);
string tname = tx.name;
JSSimpleProperty prop;
if (!tx.fields.TryGetValue(tname, out prop))
tx.fields[tname] = new JSSimpleProperty(tname, v);
if (tx.type == TokenType.GETTER)
prop.DefineGetter(new Thunk(tVal, f, x));
else
prop.DefineSetter(new Thunk(tVal, f, x));
tVal.SetItem(GLOBAL, tname, prop);
}
}
v = tVal;
break;
case TokenType.Null:
v = null;
break;
case TokenType.This:
v = x.thisOb;
break;
case TokenType.True:
v = true;
break;
case TokenType.False:
v = false;
break;
case TokenType.IDENTIFIER:
{
for (sEcon = x.scope; sEcon != null; sEcon = sEcon.parent)
{
if (sEcon.jobject != null && sEcon.jobject.HasProperty(GLOBAL, n.value.ToString()))
break;
}
v = new Reference(sEcon != null ? sEcon.jobject : GLOBAL.jobject, n.value.ToString());
}
break;
case TokenType.NUMBER:
case TokenType.STRING:
case TokenType.REGEXP:
v = n.value;
break;
case TokenType.GROUP:
v = execute(n[0], x);
break;
default:
throw new TypeError("PANIC: unknown operation " + n.type.ToString() + ": " + n.ToString());
}
}
catch (FalseReturn) { v = false; }
catch (ContinueException) { throw; }
catch (BreakException) { throw; }
catch (ThrownException) { throw; }
catch (ReturnException) { throw; }
catch (Exception e)
{
throw new ScriptException(e.Message, n, e);
}
if (TraceExec)
System.Console.WriteLine(v == null ? "(null)" : v.ToString() + " ]");
return v;
}
public object eval(string s, string f, int l)
{
ExecutionContext x = GLOBAL.currentContext;
ExecutionContext x2 = new ExecutionContext(GLOBAL);
x2.thisOb = x.thisOb;
GLOBAL.currentContext = x2;
try
{
execute(jsparse.parse(GLOBAL, s, f, l), x2);
}
catch (ThrownException)
{
if (JSObject.ToBool(GLOBAL, x))
{
x.result = x2.result;
throw;
}
throw new ThrownException(x2.result);
}
finally
{
GLOBAL.currentContext = x;
}
return x2.result;
}
public static object evaluate(string s, string f, int l)
{
jsexec je = new jsexec();
object result = je.eval(s, f, l);
return result;
}
public jsexec()
{
GLOBAL.jobject = new JSObject();
GLOBAL.jobject = GLOBAL.thisOb = new JSObject();
StaticObjectFun = new ObjectFun(GLOBAL);
GLOBAL.jobject.SetItem(GLOBAL, "StaticObjectFun", new JSSimpleProperty("StaticObjectFun", StaticObjectFun));
StaticStringFun = new StringFun(GLOBAL);
GLOBAL.jobject.SetItem(GLOBAL, "StaticStringFun", new JSSimpleProperty("StaticStringFun", StaticStringFun));
StaticBooleanFun = new BooleanFun(GLOBAL);
GLOBAL.jobject.SetItem(GLOBAL, "StaticBooleanFun", new JSSimpleProperty("StaticBooleanFun", StaticBooleanFun));
StaticArrayFun = new ArrayFun(GLOBAL);
GLOBAL.jobject.SetItem(GLOBAL, "StaticArrayFun", new JSSimpleProperty("StaticArrayFun", StaticArrayFun));
StaticNumberFun = new NumberFun(GLOBAL);