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 "JSImmediate.h"
  23 #include "object.h"
  24
  25 namespace KJS {
  26
  27 JSObject *JSImmediate::toObject(const JSValue *v, ExecState *exec)
  28 {
  29     assert(isImmediate(v));
  30     if (v == jsNull())
  31         return throwError(exec, TypeError, "Null value");
  32     else if (v == jsUndefined())
  33         return throwError(exec, TypeError, "Undefined value");
  34     else if (isBoolean(v)) {
  35         List args;
  36         args.append(const_cast<JSValue *>(v));
  37         return exec->lexicalInterpreter()->builtinBoolean()->construct(exec, args);
  38     } else {
  39         ASSERT(isNumber(v));
  40         List args;
  41         args.append(const_cast<JSValue *>(v));
  42         return exec->lexicalInterpreter()->builtinNumber()->construct(exec, args);
  43     }
  44 }
  45
  46 UString JSImmediate::toString(const JSValue *v)
  47 {
  48     ASSERT(isImmediate(v));
  49
  50     if (v == jsNull())
  51         return "null";
  52     else if (v == jsUndefined())
  53         return "undefined";
  54     else if (v == jsBoolean(true))
  55         return "true";
  56     else if (v == jsBoolean(false))
  57         return "false";
  58     else {
  59         assert(isNumber(v));
  60         double d = toDouble(v);
  61         if (d == 0.0) // +0.0 or -0.0
  62             return "0";
  63         return UString::from(d);
  64     }
  65 }
  66
  67 JSType JSImmediate::type(const JSValue *v)
  68 {
  69     ASSERT(isImmediate(v));
  70
  71     uintptr_t tag = getTag(v);
  72     if (tag == UndefinedType)
  73         return v == jsUndefined() ? UndefinedType : NullType;
  74     return static_cast<JSType>(tag);
  75 }
  76
  77 } // namespace KJS