2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2007, 2008 Apple Inc. All Rights Reserved.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser 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.
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 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "MathObject.h"
25 #include "ObjectPrototype.h"
26 #include "Operations.h"
28 #include <wtf/Assertions.h>
29 #include <wtf/MathExtras.h>
30 #include <wtf/RandomNumber.h>
31 #include <wtf/RandomNumberSeed.h>
35 ASSERT_CLASS_FITS_IN_CELL(MathObject);
37 static EncodedJSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState*);
38 static EncodedJSValue JSC_HOST_CALL mathProtoFuncACos(ExecState*);
39 static EncodedJSValue JSC_HOST_CALL mathProtoFuncASin(ExecState*);
40 static EncodedJSValue JSC_HOST_CALL mathProtoFuncATan(ExecState*);
41 static EncodedJSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState*);
42 static EncodedJSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState*);
43 static EncodedJSValue JSC_HOST_CALL mathProtoFuncCos(ExecState*);
44 static EncodedJSValue JSC_HOST_CALL mathProtoFuncExp(ExecState*);
45 static EncodedJSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState*);
46 static EncodedJSValue JSC_HOST_CALL mathProtoFuncLog(ExecState*);
47 static EncodedJSValue JSC_HOST_CALL mathProtoFuncMax(ExecState*);
48 static EncodedJSValue JSC_HOST_CALL mathProtoFuncMin(ExecState*);
49 static EncodedJSValue JSC_HOST_CALL mathProtoFuncPow(ExecState*);
50 static EncodedJSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState*);
51 static EncodedJSValue JSC_HOST_CALL mathProtoFuncRound(ExecState*);
52 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState*);
53 static EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState*);
54 static EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState*);
58 #include "MathObject.lut.h"
62 const ClassInfo MathObject::s_info = { "Math", &JSNonFinalObject::s_info, 0, ExecState::mathTable, CREATE_METHOD_TABLE(MathObject) };
64 /* Source for MathObject.lut.h
66 abs mathProtoFuncAbs DontEnum|Function 1
67 acos mathProtoFuncACos DontEnum|Function 1
68 asin mathProtoFuncASin DontEnum|Function 1
69 atan mathProtoFuncATan DontEnum|Function 1
70 atan2 mathProtoFuncATan2 DontEnum|Function 2
71 ceil mathProtoFuncCeil DontEnum|Function 1
72 cos mathProtoFuncCos DontEnum|Function 1
73 exp mathProtoFuncExp DontEnum|Function 1
74 floor mathProtoFuncFloor DontEnum|Function 1
75 log mathProtoFuncLog DontEnum|Function 1
76 max mathProtoFuncMax DontEnum|Function 2
77 min mathProtoFuncMin DontEnum|Function 2
78 pow mathProtoFuncPow DontEnum|Function 2
79 random mathProtoFuncRandom DontEnum|Function 0
80 round mathProtoFuncRound DontEnum|Function 1
81 sin mathProtoFuncSin DontEnum|Function 1
82 sqrt mathProtoFuncSqrt DontEnum|Function 1
83 tan mathProtoFuncTan DontEnum|Function 1
87 MathObject::MathObject(JSGlobalObject* globalObject, Structure* structure)
88 : JSNonFinalObject(globalObject->globalData(), structure)
92 void MathObject::finishCreation(ExecState* exec, JSGlobalObject* globalObject)
94 Base::finishCreation(globalObject->globalData());
95 ASSERT(inherits(&s_info));
97 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "E"), jsNumber(exp(1.0)), DontDelete | DontEnum | ReadOnly);
98 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LN2"), jsNumber(log(2.0)), DontDelete | DontEnum | ReadOnly);
99 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LN10"), jsNumber(log(10.0)), DontDelete | DontEnum | ReadOnly);
100 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LOG2E"), jsNumber(1.0 / log(2.0)), DontDelete | DontEnum | ReadOnly);
101 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "LOG10E"), jsNumber(0.4342944819032518), DontDelete | DontEnum | ReadOnly); // See ECMA-262 15.8.1.5
102 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "PI"), jsNumber(piDouble), DontDelete | DontEnum | ReadOnly);
103 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "SQRT1_2"), jsNumber(sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
104 putDirectWithoutTransition(exec->globalData(), Identifier(exec, "SQRT2"), jsNumber(sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
107 bool MathObject::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
109 return getStaticFunctionSlot<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(cell), propertyName, slot);
112 bool MathObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
114 return getStaticFunctionDescriptor<JSObject>(exec, ExecState::mathTable(exec), jsCast<MathObject*>(object), propertyName, descriptor);
117 // ------------------------------ Functions --------------------------------
119 EncodedJSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState* exec)
121 return JSValue::encode(jsNumber(fabs(exec->argument(0).toNumber(exec))));
124 EncodedJSValue JSC_HOST_CALL mathProtoFuncACos(ExecState* exec)
126 return JSValue::encode(jsDoubleNumber(acos(exec->argument(0).toNumber(exec))));
129 EncodedJSValue JSC_HOST_CALL mathProtoFuncASin(ExecState* exec)
131 return JSValue::encode(jsDoubleNumber(asin(exec->argument(0).toNumber(exec))));
134 EncodedJSValue JSC_HOST_CALL mathProtoFuncATan(ExecState* exec)
136 return JSValue::encode(jsDoubleNumber(atan(exec->argument(0).toNumber(exec))));
139 EncodedJSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState* exec)
141 double arg0 = exec->argument(0).toNumber(exec);
142 double arg1 = exec->argument(1).toNumber(exec);
143 return JSValue::encode(jsDoubleNumber(atan2(arg0, arg1)));
146 EncodedJSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState* exec)
148 return JSValue::encode(jsNumber(ceil(exec->argument(0).toNumber(exec))));
151 EncodedJSValue JSC_HOST_CALL mathProtoFuncCos(ExecState* exec)
153 return JSValue::encode(jsDoubleNumber(cos(exec->argument(0).toNumber(exec))));
156 EncodedJSValue JSC_HOST_CALL mathProtoFuncExp(ExecState* exec)
158 return JSValue::encode(jsDoubleNumber(exp(exec->argument(0).toNumber(exec))));
161 EncodedJSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState* exec)
163 return JSValue::encode(jsNumber(floor(exec->argument(0).toNumber(exec))));
166 EncodedJSValue JSC_HOST_CALL mathProtoFuncLog(ExecState* exec)
168 return JSValue::encode(jsDoubleNumber(log(exec->argument(0).toNumber(exec))));
171 EncodedJSValue JSC_HOST_CALL mathProtoFuncMax(ExecState* exec)
173 unsigned argsCount = exec->argumentCount();
174 double result = -std::numeric_limits<double>::infinity();
175 for (unsigned k = 0; k < argsCount; ++k) {
176 double val = exec->argument(k).toNumber(exec);
178 result = std::numeric_limits<double>::quiet_NaN();
181 if (val > result || (val == 0 && result == 0 && !signbit(val)))
184 return JSValue::encode(jsNumber(result));
187 EncodedJSValue JSC_HOST_CALL mathProtoFuncMin(ExecState* exec)
189 unsigned argsCount = exec->argumentCount();
190 double result = +std::numeric_limits<double>::infinity();
191 for (unsigned k = 0; k < argsCount; ++k) {
192 double val = exec->argument(k).toNumber(exec);
194 result = std::numeric_limits<double>::quiet_NaN();
197 if (val < result || (val == 0 && result == 0 && signbit(val)))
200 return JSValue::encode(jsNumber(result));
203 EncodedJSValue JSC_HOST_CALL mathProtoFuncPow(ExecState* exec)
207 double arg = exec->argument(0).toNumber(exec);
208 double arg2 = exec->argument(1).toNumber(exec);
211 return JSValue::encode(jsNaN());
212 if (isinf(arg2) && fabs(arg) == 1)
213 return JSValue::encode(jsNaN());
214 return JSValue::encode(jsNumber(pow(arg, arg2)));
217 EncodedJSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState* exec)
219 return JSValue::encode(jsDoubleNumber(exec->lexicalGlobalObject()->weakRandomNumber()));
222 EncodedJSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec)
224 double arg = exec->argument(0).toNumber(exec);
225 double integer = ceil(arg);
226 return JSValue::encode(jsNumber(integer - (integer - arg > 0.5)));
229 EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec)
231 return JSValue::encode(exec->globalData().cachedSin(exec->argument(0).toNumber(exec)));
234 EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec)
236 return JSValue::encode(jsDoubleNumber(sqrt(exec->argument(0).toNumber(exec))));
239 EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec)
241 return JSValue::encode(jsDoubleNumber(tan(exec->argument(0).toNumber(exec))));