File indexing completed on 2024-05-12 15:43:31

 /*
  *  This file is part of the KDE libraries
  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  *
  */
 
 #include "operations.h"
 
 #include "object.h"
 #include "internal.h"
 
 namespace KJS
 {
 // ECMA 11.9.3
 bool equal(ExecState *exec, JSValue *v1, JSValue *v2)
 {
     JSType t1 = JSValue::type(v1);
     JSType t2 = JSValue::type(v2);
 
     if (t1 != t2) {
         if (t1 == UndefinedType) {
             t1 = NullType;
         }
         if (t2 == UndefinedType) {
             t2 = NullType;
         }
 
         if (t1 == BooleanType) {
             t1 = NumberType;
         }
         if (t2 == BooleanType) {
             t2 = NumberType;
         }
 
         if (t1 == NumberType && t2 == StringType) {
             // use toNumber
         } else if (t1 == StringType && t2 == NumberType) {
             t1 = NumberType;
         }
         // use toNumber
         else {
             if ((t1 == StringType || t1 == NumberType) && t2 >= ObjectType) {
                 return equal(exec, v1, JSValue::toPrimitive(v2, exec));
             }
             if (t1 == NullType && t2 == ObjectType) {
                 return static_cast<JSObject *>(v2)->masqueradeAsUndefined();
             }
             if (t1 >= ObjectType && (t2 == StringType || t2 == NumberType)) {
                 return equal(exec, JSValue::toPrimitive(v1, exec), v2);
             }
             if (t1 == ObjectType && t2 == NullType) {
                 return static_cast<JSObject *>(v1)->masqueradeAsUndefined();
             }
             if (t1 != t2) {
                 return false;
             }
         }
     }
 
     if (t1 == UndefinedType || t1 == NullType) {
         return true;
     }
 
     if (t1 == NumberType) {
         double d1 = JSValue::toNumber(v1, exec);
         double d2 = JSValue::toNumber(v2, exec);
         return d1 == d2;
     }
 
     if (t1 == StringType) {
         return JSValue::toString(v1, exec) == JSValue::toString(v2, exec);
     }
 
     if (t1 == BooleanType) {
         return JSValue::toBoolean(v1, exec) == JSValue::toBoolean(v2,  exec);
     }
 
     // types are Object
     return v1 == v2;
 }
 
 bool strictEqual(ExecState *exec, JSValue *v1, JSValue *v2)
 {
     JSType t1 = JSValue::type(v1);
     JSType t2 = JSValue::type(v2);
 
     if (t1 != t2) {
         return false;
     }
     if (t1 == UndefinedType || t1 == NullType) {
         return true;
     }
     if (t1 == NumberType) {
         double n1 = JSValue::toNumber(v1, exec);
         double n2 = JSValue::toNumber(v2, exec);
         if (n1 == n2) {
             return true;
         }
         return false;
     } else if (t1 == StringType) {
         return JSValue::toString(v1, exec) == JSValue::toString(v2, exec);
     } else if (t2 == BooleanType) {
         return JSValue::toBoolean(v1, exec) == JSValue::toBoolean(v2,  exec);
     }
 
     if (v1 == v2) {
         return true;
     }
     /* TODO: joined objects */
 
     return false;
 }
 
 int relation(ExecState *exec, JSValue *v1, JSValue *v2, bool leftFirst)
 {
     double n1;
     double n2;
     JSValue *p1;
     JSValue *p2;
 
     bool wasNotString1;
     bool wasNotString2;
 
     if (leftFirst) {
         wasNotString1 = JSValue::getPrimitiveNumber(v1, exec, n1, p1);
         if (exec->hadException()) {
             return -1;
         }
         wasNotString2 = JSValue::getPrimitiveNumber(v2, exec, n2, p2);
     } else {
         wasNotString1 = JSValue::getPrimitiveNumber(v2, exec, n2, p2);
         if (exec->hadException()) {
             return -1;
         }
         wasNotString2 = JSValue::getPrimitiveNumber(v1, exec, n1, p1);
     }
 
     if (wasNotString1 || wasNotString2) {
         if (n1 < n2) {
             return 1;
         }
         if (n1 >= n2) {
             return 0;
         }
         return -1; // must be NaN, so undefined
     }
 
     assert(JSValue::isString(p1) && JSValue::isString(p2));
     return static_cast<const StringImp *>(p1)->value() < static_cast<const StringImp *>(p2)->value() ? 1 : 0;
 }
 
 //EMCA 9.12
 bool sameValue(ExecState *exec, JSValue *v1, JSValue *v2)
 {
     using namespace std;
     JSType t1 = JSValue::type(v1);
     JSType t2 = JSValue::type(v2);
 
     if (t1 != t2) {
         return false;
     }
     if (t1 == UndefinedType || t1 == NullType) {
         return true;
     }
     if (t1 == NumberType) {
         double n1 = JSValue::toNumber(v1, exec);
         double n2 = JSValue::toNumber(v2, exec);
         if (isNaN(n1) && isNaN(n2)) {
             return true;
         }
         if (signbit(n1) != signbit(n2)) {
             return false;
         }
         if (n1 == n2) {
             return true;
         }
         return false;
     } else if (t1 == StringType) {
         return JSValue::toString(v1, exec) == JSValue::toString(v2, exec);
     } else if (t2 == BooleanType) {
         return JSValue::toBoolean(v1, exec) == JSValue::toBoolean(v2,  exec);
     }
 
     if (v1 == v2) {
         return true;
     }
     /* TODO: joined objects */
 
     return false;
 }
 
 int relation(ExecState *exec, JSValue *v1, double n2)
 {
     double n1;
     JSValue *p1;
 
     JSValue::getPrimitiveNumber(v1, exec, n1, p1);
     if (exec->hadException()) {
         return -1;
     }
 
     if (n1 < n2) {
         return 1;
     }
     if (n1 >= n2) {
         return 0;
     }
     return -1; // must be NaN, so undefined
 }
 
 int maxInt(int d1, int d2)
 {
     return (d1 > d2) ? d1 : d2;
 }
 
 int minInt(int d1, int d2)
 {
     return (d1 < d2) ? d1 : d2;
 }
 
 double exponentiation(double base, double exponent)
 {
     if (isNaN(exponent))
     return NaN;
     if (abs(base) == 1 && isInf(exponent))
     return NaN;
     return pow(base, exponent);
 }
 
 }