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266 lines
6.1 KiB
266 lines
6.1 KiB
// -*- c-basic-offset: 2 -*-
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/*
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* This file is part of the KDE libraries
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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef HAVE_FLOAT_H /* just for !Windows */
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#define HAVE_FLOAT_H 0
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#define HAVE_FUNC__FINITE 0
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#endif
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#include <stdio.h>
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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// For declaration of isinf on Sun C++
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#ifdef __SUNPRO_CC
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#include <sunmath.h>
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#endif
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#ifndef HAVE_FUNC_ISINF
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#ifdef HAVE_IEEEFP_H
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#include <ieeefp.h>
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#endif
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#endif /* HAVE_FUNC_ISINF */
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#if HAVE_FLOAT_H
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#include <float.h>
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#endif
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#include "operations.h"
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#include "object.h"
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using namespace KJS;
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bool KJS::isNaN(double d)
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{
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#ifdef HAVE_FUNC_ISNAN
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return isnan(d);
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#elif defined HAVE_FLOAT_H
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return _isnan(d) != 0;
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#else
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return !(d == d);
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#endif
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}
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bool KJS::isInf(double d)
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{
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#if defined(HAVE_FUNC_ISINF)
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return isinf(d);
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#elif HAVE_FUNC_FINITE
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return finite(d) == 0 && d == d;
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#elif HAVE_FUNC__FINITE
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return _finite(d) == 0 && d == d;
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#else
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return false;
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#endif
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}
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bool KJS::isPosInf(double d)
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{
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#if defined(HAVE_FUNC_ISINF)
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return (isinf(d) == 1);
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#elif HAVE_FUNC_FINITE
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return finite(d) == 0 && d == d; // ### can we distinguish between + and - ?
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#elif HAVE_FUNC__FINITE
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return _finite(d) == 0 && d == d; // ###
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#else
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return false;
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#endif
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}
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bool KJS::isNegInf(double d)
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{
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#if defined(HAVE_FUNC_ISINF)
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return (isinf(d) == -1);
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#elif HAVE_FUNC_FINITE
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return finite(d) == 0 && d == d; // ###
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#elif HAVE_FUNC__FINITE
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return _finite(d) == 0 && d == d; // ###
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#else
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return false;
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#endif
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}
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// ECMA 11.9.3
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bool KJS::equal(ExecState *exec, const Value& v1, const Value& v2)
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{
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Type t1 = v1.type();
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Type t2 = v2.type();
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if (t1 == t2) {
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if (t1 == UndefinedType || t1 == NullType)
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return true;
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if (t1 == NumberType)
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{
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double d1 = v1.toNumber(exec);
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double d2 = v2.toNumber(exec);
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if ( isNaN( d1 ) || isNaN( d2 ) )
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return false;
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return ( d1 == d2 ); /* TODO: +0, -0 ? */
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}
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if (t1 == StringType)
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return (v1.toString(exec) == v2.toString(exec));
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if (t1 == BooleanType)
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return (v1.toBoolean(exec) == v2.toBoolean(exec));
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// types are Object
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return (v1.imp() == v2.imp());
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}
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// different types
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if ((t1 == NullType && t2 == UndefinedType) || (t1 == UndefinedType && t2 == NullType))
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return true;
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if (t1 == NumberType && t2 == StringType) {
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Number n2 = v2.toNumber(exec);
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return equal(exec,v1, n2);
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}
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if ((t1 == StringType && t2 == NumberType) || t1 == BooleanType) {
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Number n1 = v1.toNumber(exec);
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return equal(exec,n1, v2);
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}
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if (t2 == BooleanType) {
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Number n2 = v2.toNumber(exec);
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return equal(exec,v1, n2);
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}
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if ((t1 == StringType || t1 == NumberType) && t2 >= ObjectType) {
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Value p2 = v2.toPrimitive(exec);
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return equal(exec,v1, p2);
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}
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if (t1 >= ObjectType && (t2 == StringType || t2 == NumberType)) {
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Value p1 = v1.toPrimitive(exec);
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return equal(exec,p1, v2);
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}
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return false;
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}
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bool KJS::strictEqual(ExecState *exec, const Value &v1, const Value &v2)
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{
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Type t1 = v1.type();
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Type t2 = v2.type();
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if (t1 != t2)
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return false;
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if (t1 == UndefinedType || t1 == NullType)
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return true;
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if (t1 == NumberType) {
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double n1 = v1.toNumber(exec);
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double n2 = v2.toNumber(exec);
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if (isNaN(n1) || isNaN(n2))
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return false;
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if (n1 == n2)
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return true;
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/* TODO: +0 and -0 */
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return false;
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} else if (t1 == StringType) {
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return v1.toString(exec) == v2.toString(exec);
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} else if (t2 == BooleanType) {
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return v1.toBoolean(exec) == v2.toBoolean(exec);
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}
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if (v1.imp() == v2.imp())
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return true;
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/* TODO: joined objects */
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return false;
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}
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int KJS::relation(ExecState *exec, const Value& v1, const Value& v2)
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{
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Value p1 = v1.toPrimitive(exec,NumberType);
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Value p2 = v2.toPrimitive(exec,NumberType);
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if (p1.type() == StringType && p2.type() == StringType)
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return p1.toString(exec) < p2.toString(exec) ? 1 : 0;
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double n1 = p1.toNumber(exec);
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double n2 = p2.toNumber(exec);
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if ( isNaN( n1 ) || isNaN( n2 ) )
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return -1; // means undefined
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if (n1 == n2)
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return 0;
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/* TODO: +0, -0 */
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if ( isPosInf( n1 ) )
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return 0;
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if ( isPosInf( n2 ) )
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return 1;
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if ( isNegInf( n2 ) )
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return 0;
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if ( isNegInf( n1 ) )
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return 1;
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return (n1 < n2) ? 1 : 0;
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}
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int KJS::maxInt(int d1, int d2)
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{
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return (d1 > d2) ? d1 : d2;
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}
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int KJS::minInt(int d1, int d2)
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{
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return (d1 < d2) ? d1 : d2;
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}
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// ECMA 11.6
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Value KJS::add(ExecState *exec, const Value &v1, const Value &v2, char oper)
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{
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// exception for the Date exception in defaultValue()
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Type preferred = oper == '+' ? UnspecifiedType : NumberType;
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Value p1 = v1.toPrimitive(exec, preferred);
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Value p2 = v2.toPrimitive(exec, preferred);
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if ((p1.type() == StringType || p2.type() == StringType) && oper == '+') {
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UString s1 = p1.toString(exec);
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UString s2 = p2.toString(exec);
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return String(s1 + s2);
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}
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double n1 = p1.toNumber(exec);
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double n2 = p2.toNumber(exec);
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if (oper == '+')
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return Number(n1 + n2);
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else
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return Number(n1 - n2);
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}
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// ECMA 11.5
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Value KJS::mult(ExecState *exec, const Value &v1, const Value &v2, char oper)
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{
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double n1 = v1.toNumber(exec);
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double n2 = v2.toNumber(exec);
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double result;
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if (oper == '*')
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result = n1 * n2;
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else if (oper == '/')
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result = n1 / n2;
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else
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result = fmod(n1, n2);
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return Number(result);
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}
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