kjs/JSImmediate.cpp

   1 /*
   2  *  This file is part of the KDE libraries
   3  *  Copyright (C) 2003-2006 Apple Computer, Inc
   4  *
   5  *  This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Library General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Library General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Library General Public License
  16  *  along with this library; see the file COPYING.LIB.  If not, write to
  17  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  *  Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "JSImmediate.h"
  24
  25 #include "JSGlobalObject.h"
  26 #include "bool_object.h"
  27 #include "number_object.h"
  28 #include "object.h"
  29
  30 namespace KJS {
  31
  32 JSObject *JSImmediate::toObject(const JSValue *v, ExecState *exec)
  33 {
  34     ASSERT(isImmediate(v));
  35     if (v == jsNull())
  36         return throwError(exec, TypeError, "Null value");
  37     else if (v == jsUndefined())
  38         return throwError(exec, TypeError, "Undefined value");
  39     else if (isBoolean(v)) {
  40         List args;
  41         args.append(const_cast<JSValue *>(v));
  42         return exec->lexicalGlobalObject()->booleanConstructor()->construct(exec, args);
  43     } else {
  44         ASSERT(isNumber(v));
  45         List args;
  46         args.append(const_cast<JSValue *>(v));
  47         return exec->lexicalGlobalObject()->numberConstructor()->construct(exec, args);
  48     }
  49 }
  50
  51 UString JSImmediate::toString(const JSValue *v)
  52 {
  53     ASSERT(isImmediate(v));
  54
  55     if (v == jsNull())
  56         return "null";
  57     else if (v == jsUndefined())
  58         return "undefined";
  59     else if (v == jsBoolean(true))
  60         return "true";
  61     else if (v == jsBoolean(false))
  62         return "false";
  63     else {
  64         ASSERT(isNumber(v));
  65         double d = toDouble(v);
  66         if (d == 0.0) // +0.0 or -0.0
  67             return "0";
  68         return UString::from(d);
  69     }
  70 }
  71
  72 JSType JSImmediate::type(const JSValue *v)
  73 {
  74     ASSERT(isImmediate(v));
  75
  76     uintptr_t tag = getTag(v);
  77     if (tag == UndefinedType)
  78         return v == jsUndefined() ? UndefinedType : NullType;
  79     return static_cast<JSType>(tag);
  80 }
  81
  82 } // namespace KJS