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# bool_object.cpp

    00001 // -*- c-basic-offset: 2 -*-
    00002 /*
    00003  *  This file is part of the KDE libraries
    00004  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
    00005  *  Copyright (C) 2003 Apple Computer, Inc.
    00006  *
    00007  *  This library is free software; you can redistribute it and/or
    00008  *  modify it under the terms of the GNU Lesser General Public
    00009  *  License as published by the Free Software Foundation; either
    00010  *  version 2 of the License, or (at your option) any later version.
    00011  *
    00012  *  This library is distributed in the hope that it will be useful,
    00013  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00015  *  Lesser General Public License for more details.
    00016  *
    00017  *  You should have received a copy of the GNU Lesser General Public
    00018  *  License along with this library; if not, write to the Free Software
    00019  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00020  *
    00021  */
    00022
    00023 #include "value.h"
    00024 #include "object.h"
    00025 #include "types.h"
    00026 #include "interpreter.h"
    00027 #include "operations.h"
    00028 #include "bool_object.h"
    00029 #include "error_object.h"
    00030 #include "lookup.h"
    00031
    00032 #include <assert.h>
    00033
    00034 using namespace KJS;
    00035
    00036 // ------------------------------ BooleanInstanceImp ---------------------------
    00037
    00038 const ClassInfo BooleanInstanceImp::info = {"Boolean", 0, 0, 0};
    00039
    00040 BooleanInstanceImp::BooleanInstanceImp(ObjectImp *proto)
    00041   : ObjectImp(proto)
    00042 {
    00043 }
    00044
    00045 // ------------------------------ BooleanPrototypeImp --------------------------
    00046
    00047 // ECMA 15.6.4
    00048
    00049 BooleanPrototypeImp::BooleanPrototypeImp(ExecState *exec,
    00050                                          ObjectPrototypeImp *objectProto,
    00051                                          FunctionPrototypeImp *funcProto)
    00052   : BooleanInstanceImp(objectProto)
    00053 {
    00054   Value protect(this);
    00055   // The constructor will be added later by InterpreterImp::InterpreterImp()
    00056
    00057   putDirect(toStringPropertyName,
    00058         new BooleanProtoFuncImp(exec,funcProto,BooleanProtoFuncImp::ToString,0,toStringPropertyName), DontEnum);
    00059   putDirect(valueOfPropertyName,
    00060         new BooleanProtoFuncImp(exec,funcProto,BooleanProtoFuncImp::ValueOf,0,valueOfPropertyName),  DontEnum);
    00061   setInternalValue(Boolean(false));
    00062 }
    00063
    00064
    00065 // ------------------------------ BooleanProtoFuncImp --------------------------
    00066
    00067 BooleanProtoFuncImp::BooleanProtoFuncImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
    00068                                          int i, int len, const Identifier &_ident)
    00069   : InternalFunctionImp(funcProto), id(i)
    00070 {
    00071   Value protect(this);
    00072   putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
    00073   ident = _ident;
    00074 }
    00075
    00076
    00077 bool BooleanProtoFuncImp::implementsCall() const
    00078 {
    00079   return true;
    00080 }
    00081
    00082
    00083 // ECMA 15.6.4.2 + 15.6.4.3
    00084 Value BooleanProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &/*args*/)
    00085 {
    00086   // no generic function. "this" has to be a Boolean object
    00087   KJS_CHECK_THIS( BooleanInstanceImp, thisObj );
    00088
    00089   // execute "toString()" or "valueOf()", respectively
    00090
    00091   Value v = thisObj.internalValue();
    00092   assert(v.isValid());
    00093
    00094   if (id == ToString)
    00095     return String(v.toString(exec));
    00096   else
    00097     return Boolean(v.toBoolean(exec)); /* TODO: optimize for bool case */
    00098 }
    00099
    00100 // ------------------------------ BooleanObjectImp -----------------------------
    00101
    00102
    00103 BooleanObjectImp::BooleanObjectImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
    00104                                    BooleanPrototypeImp *booleanProto)
    00105   : InternalFunctionImp(funcProto)
    00106 {
    00107   Value protect(this);
    00108   putDirect(prototypePropertyName, booleanProto, DontEnum|DontDelete|ReadOnly);
    00109
    00110   // no. of arguments for constructor
    00111   putDirect(lengthPropertyName, NumberImp::one(), ReadOnly|DontDelete|DontEnum);
    00112 }
    00113
    00114
    00115 bool BooleanObjectImp::implementsConstruct() const
    00116 {
    00117   return true;
    00118 }
    00119
    00120 // ECMA 15.6.2
    00121 Object BooleanObjectImp::construct(ExecState *exec, const List &args)
    00122 {
    00123   Object obj(new BooleanInstanceImp(exec->interpreter()->builtinBooleanPrototype().imp()));
    00124
    00125   Boolean b;
    00126   if (args.size() > 0)
    00127     b = args.begin()->dispatchToBoolean(exec);
    00128   else
    00129     b = Boolean(false);
    00130
    00131   obj.setInternalValue(b);
    00132
    00133   return obj;
    00134 }
    00135
    00136 bool BooleanObjectImp::implementsCall() const
    00137 {
    00138   return true;
    00139 }
    00140
    00141 // ECMA 15.6.1
    00142 Value BooleanObjectImp::call(ExecState *exec, Object &/*thisObj*/, const List &args)
    00143 {
    00144   if (args.isEmpty())
    00145     return Boolean(false);
    00146   else
    00147     return Boolean(args[0].toBoolean(exec)); /* TODO: optimize for bool case */
    00148 }
    00149

This file is part of the documentation for kjs Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:23:05 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003