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 // ------------------------------ MathObject --------------------------------
64 const ClassInfo MathObject::info = { "Math", 0, 0, ExecState::mathTable };
66 /* Source for MathObject.lut.h
68 abs mathProtoFuncAbs DontEnum|Function 1
69 acos mathProtoFuncACos DontEnum|Function 1
70 asin mathProtoFuncASin DontEnum|Function 1
71 atan mathProtoFuncATan DontEnum|Function 1
72 atan2 mathProtoFuncATan2 DontEnum|Function 2
73 ceil mathProtoFuncCeil DontEnum|Function 1
74 cos mathProtoFuncCos DontEnum|Function 1
75 exp mathProtoFuncExp DontEnum|Function 1
76 floor mathProtoFuncFloor DontEnum|Function 1
77 log mathProtoFuncLog DontEnum|Function 1
78 max mathProtoFuncMax DontEnum|Function 2
79 min mathProtoFuncMin DontEnum|Function 2
80 pow mathProtoFuncPow DontEnum|Function 2
81 random mathProtoFuncRandom DontEnum|Function 0
82 round mathProtoFuncRound DontEnum|Function 1
83 sin mathProtoFuncSin DontEnum|Function 1
84 sqrt mathProtoFuncSqrt DontEnum|Function 1
85 tan mathProtoFuncTan DontEnum|Function 1
89 MathObject::MathObject(ExecState* exec, JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure)
90 : JSObjectWithGlobalObject(globalObject, structure)
92 putDirectWithoutTransition(Identifier(exec, "E"), jsNumber(exp(1.0)), DontDelete | DontEnum | ReadOnly);
93 putDirectWithoutTransition(Identifier(exec, "LN2"), jsNumber(log(2.0)), DontDelete | DontEnum | ReadOnly);
94 putDirectWithoutTransition(Identifier(exec, "LN10"), jsNumber(log(10.0)), DontDelete | DontEnum | ReadOnly);
95 putDirectWithoutTransition(Identifier(exec, "LOG2E"), jsNumber(1.0 / log(2.0)), DontDelete | DontEnum | ReadOnly);
96 putDirectWithoutTransition(Identifier(exec, "LOG10E"), jsNumber(1.0 / log(10.0)), DontDelete | DontEnum | ReadOnly);
97 putDirectWithoutTransition(Identifier(exec, "PI"), jsNumber(piDouble), DontDelete | DontEnum | ReadOnly);
98 putDirectWithoutTransition(Identifier(exec, "SQRT1_2"), jsNumber(sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
99 putDirectWithoutTransition(Identifier(exec, "SQRT2"), jsNumber(sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
104 bool MathObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
106 return getStaticFunctionSlot<JSObject>(exec, ExecState::mathTable(exec), this, propertyName, slot);
109 bool MathObject::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
111 return getStaticFunctionDescriptor<JSObject>(exec, ExecState::mathTable(exec), this, propertyName, descriptor);
114 // ------------------------------ Functions --------------------------------
116 EncodedJSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState* exec)
118 return JSValue::encode(jsNumber(fabs(exec->argument(0).toNumber(exec))));
121 EncodedJSValue JSC_HOST_CALL mathProtoFuncACos(ExecState* exec)
123 return JSValue::encode(jsDoubleNumber(acos(exec->argument(0).toNumber(exec))));
126 EncodedJSValue JSC_HOST_CALL mathProtoFuncASin(ExecState* exec)
128 return JSValue::encode(jsDoubleNumber(asin(exec->argument(0).toNumber(exec))));
131 EncodedJSValue JSC_HOST_CALL mathProtoFuncATan(ExecState* exec)
133 return JSValue::encode(jsDoubleNumber(atan(exec->argument(0).toNumber(exec))));
136 EncodedJSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState* exec)
138 double arg0 = exec->argument(0).toNumber(exec);
139 double arg1 = exec->argument(1).toNumber(exec);
140 return JSValue::encode(jsDoubleNumber(atan2(arg0, arg1)));
143 EncodedJSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState* exec)
145 return JSValue::encode(jsNumber(ceil(exec->argument(0).toNumber(exec))));
148 EncodedJSValue JSC_HOST_CALL mathProtoFuncCos(ExecState* exec)
150 return JSValue::encode(jsDoubleNumber(cos(exec->argument(0).toNumber(exec))));
153 EncodedJSValue JSC_HOST_CALL mathProtoFuncExp(ExecState* exec)
155 return JSValue::encode(jsDoubleNumber(exp(exec->argument(0).toNumber(exec))));
158 EncodedJSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState* exec)
160 return JSValue::encode(jsNumber(floor(exec->argument(0).toNumber(exec))));
163 EncodedJSValue JSC_HOST_CALL mathProtoFuncLog(ExecState* exec)
165 return JSValue::encode(jsDoubleNumber(log(exec->argument(0).toNumber(exec))));
168 EncodedJSValue JSC_HOST_CALL mathProtoFuncMax(ExecState* exec)
170 unsigned argsCount = exec->argumentCount();
171 double result = -Inf;
172 for (unsigned k = 0; k < argsCount; ++k) {
173 double val = exec->argument(k).toNumber(exec);
178 if (val > result || (val == 0 && result == 0 && !signbit(val)))
181 return JSValue::encode(jsNumber(result));
184 EncodedJSValue JSC_HOST_CALL mathProtoFuncMin(ExecState* exec)
186 unsigned argsCount = exec->argumentCount();
187 double result = +Inf;
188 for (unsigned k = 0; k < argsCount; ++k) {
189 double val = exec->argument(k).toNumber(exec);
194 if (val < result || (val == 0 && result == 0 && signbit(val)))
197 return JSValue::encode(jsNumber(result));
200 EncodedJSValue JSC_HOST_CALL mathProtoFuncPow(ExecState* exec)
204 double arg = exec->argument(0).toNumber(exec);
205 double arg2 = exec->argument(1).toNumber(exec);
208 return JSValue::encode(jsNaN());
209 if (isinf(arg2) && fabs(arg) == 1)
210 return JSValue::encode(jsNaN());
211 return JSValue::encode(jsNumber(pow(arg, arg2)));
214 EncodedJSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState* exec)
216 return JSValue::encode(jsDoubleNumber(exec->lexicalGlobalObject()->weakRandomNumber()));
219 EncodedJSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec)
221 double arg = exec->argument(0).toNumber(exec);
222 double integer = ceil(arg);
223 return JSValue::encode(jsNumber(integer - (integer - arg > 0.5)));
226 EncodedJSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec)
228 return JSValue::encode(exec->globalData().cachedSin(exec->argument(0).toNumber(exec)));
231 EncodedJSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec)
233 return JSValue::encode(jsDoubleNumber(sqrt(exec->argument(0).toNumber(exec))));
236 EncodedJSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec)
238 return JSValue::encode(jsDoubleNumber(tan(exec->argument(0).toNumber(exec))));