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[apple/javascriptcore.git] / runtime / MathObject.cpp
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9dae56ea
A		 1/*
2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2007, 2008 Apple Inc. All Rights Reserved.
4 *
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.
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 * Lesser General Public License for more details.
14 *
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
18 *
19 */
20
21#include "config.h"
22#include "MathObject.h"
23
4e4e5a6f 24#include "Lookup.h"
9dae56ea
A		 25#include "ObjectPrototype.h"
26#include "Operations.h"
27#include <time.h>
28#include <wtf/Assertions.h>
29#include <wtf/MathExtras.h>
30#include <wtf/RandomNumber.h>
31#include <wtf/RandomNumberSeed.h>
32
33namespace JSC {
34
35ASSERT_CLASS_FITS_IN_CELL(MathObject);
36
ba379fdc
A		 37static JSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState*, JSObject*, JSValue, const ArgList&);
38static JSValue JSC_HOST_CALL mathProtoFuncACos(ExecState*, JSObject*, JSValue, const ArgList&);
39static JSValue JSC_HOST_CALL mathProtoFuncASin(ExecState*, JSObject*, JSValue, const ArgList&);
40static JSValue JSC_HOST_CALL mathProtoFuncATan(ExecState*, JSObject*, JSValue, const ArgList&);
41static JSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState*, JSObject*, JSValue, const ArgList&);
42static JSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState*, JSObject*, JSValue, const ArgList&);
43static JSValue JSC_HOST_CALL mathProtoFuncCos(ExecState*, JSObject*, JSValue, const ArgList&);
44static JSValue JSC_HOST_CALL mathProtoFuncExp(ExecState*, JSObject*, JSValue, const ArgList&);
45static JSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState*, JSObject*, JSValue, const ArgList&);
46static JSValue JSC_HOST_CALL mathProtoFuncLog(ExecState*, JSObject*, JSValue, const ArgList&);
47static JSValue JSC_HOST_CALL mathProtoFuncMax(ExecState*, JSObject*, JSValue, const ArgList&);
48static JSValue JSC_HOST_CALL mathProtoFuncMin(ExecState*, JSObject*, JSValue, const ArgList&);
49static JSValue JSC_HOST_CALL mathProtoFuncPow(ExecState*, JSObject*, JSValue, const ArgList&);
50static JSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState*, JSObject*, JSValue, const ArgList&);
51static JSValue JSC_HOST_CALL mathProtoFuncRound(ExecState*, JSObject*, JSValue, const ArgList&);
52static JSValue JSC_HOST_CALL mathProtoFuncSin(ExecState*, JSObject*, JSValue, const ArgList&);
53static JSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState*, JSObject*, JSValue, const ArgList&);
54static JSValue JSC_HOST_CALL mathProtoFuncTan(ExecState*, JSObject*, JSValue, const ArgList&);
9dae56ea
A		 55
56}
57
58#include "MathObject.lut.h"
59
60namespace JSC {
61
62// ------------------------------ MathObject --------------------------------
63
64const ClassInfo MathObject::info = { "Math", 0, 0, ExecState::mathTable };
65
66/* Source for MathObject.lut.h
67@begin mathTable
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
86@end
87*/
88
f9bf01c6 89MathObject::MathObject(ExecState* exec, NonNullPassRefPtr<Structure> structure)
9dae56ea
A		 90 : JSObject(structure)
91{
92 putDirectWithoutTransition(Identifier(exec, "E"), jsNumber(exec, exp(1.0)), DontDelete | DontEnum | ReadOnly);
93 putDirectWithoutTransition(Identifier(exec, "LN2"), jsNumber(exec, log(2.0)), DontDelete | DontEnum | ReadOnly);
94 putDirectWithoutTransition(Identifier(exec, "LN10"), jsNumber(exec, log(10.0)), DontDelete | DontEnum | ReadOnly);
95 putDirectWithoutTransition(Identifier(exec, "LOG2E"), jsNumber(exec, 1.0 / log(2.0)), DontDelete | DontEnum | ReadOnly);
96 putDirectWithoutTransition(Identifier(exec, "LOG10E"), jsNumber(exec, 1.0 / log(10.0)), DontDelete | DontEnum | ReadOnly);
97 putDirectWithoutTransition(Identifier(exec, "PI"), jsNumber(exec, piDouble), DontDelete | DontEnum | ReadOnly);
98 putDirectWithoutTransition(Identifier(exec, "SQRT1_2"), jsNumber(exec, sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
99 putDirectWithoutTransition(Identifier(exec, "SQRT2"), jsNumber(exec, sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
9dae56ea
A		 100}
101
102// ECMA 15.8
103
104bool MathObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
105{
f9bf01c6
A		 106 return getStaticFunctionSlot<JSObject>(exec, ExecState::mathTable(exec), this, propertyName, slot);
107}
9dae56ea 108
f9bf01c6
A		 109bool MathObject::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
110{
111 return getStaticFunctionDescriptor<JSObject>(exec, ExecState::mathTable(exec), this, propertyName, descriptor);
9dae56ea
A		 112}
113
114// ------------------------------ Functions --------------------------------
115
ba379fdc 116JSValue JSC_HOST_CALL mathProtoFuncAbs(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 117{
ba379fdc 118 return jsNumber(exec, fabs(args.at(0).toNumber(exec)));
9dae56ea
A		 119}
120
ba379fdc 121JSValue JSC_HOST_CALL mathProtoFuncACos(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 122{
f9bf01c6 123 return jsDoubleNumber(exec, acos(args.at(0).toNumber(exec)));
9dae56ea
A		 124}
125
ba379fdc 126JSValue JSC_HOST_CALL mathProtoFuncASin(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 127{
f9bf01c6 128 return jsDoubleNumber(exec, asin(args.at(0).toNumber(exec)));
9dae56ea
A		 129}
130
ba379fdc 131JSValue JSC_HOST_CALL mathProtoFuncATan(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 132{
f9bf01c6 133 return jsDoubleNumber(exec, atan(args.at(0).toNumber(exec)));
9dae56ea
A		 134}
135
ba379fdc 136JSValue JSC_HOST_CALL mathProtoFuncATan2(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 137{
f9bf01c6 138 return jsDoubleNumber(exec, atan2(args.at(0).toNumber(exec), args.at(1).toNumber(exec)));
9dae56ea
A		 139}
140
ba379fdc 141JSValue JSC_HOST_CALL mathProtoFuncCeil(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 142{
ba379fdc 143 return jsNumber(exec, ceil(args.at(0).toNumber(exec)));
9dae56ea
A		 144}
145
ba379fdc 146JSValue JSC_HOST_CALL mathProtoFuncCos(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 147{
f9bf01c6 148 return jsDoubleNumber(exec, cos(args.at(0).toNumber(exec)));
9dae56ea
A		 149}
150
ba379fdc 151JSValue JSC_HOST_CALL mathProtoFuncExp(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 152{
f9bf01c6 153 return jsDoubleNumber(exec, exp(args.at(0).toNumber(exec)));
9dae56ea
A		 154}
155
ba379fdc 156JSValue JSC_HOST_CALL mathProtoFuncFloor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 157{
ba379fdc 158 return jsNumber(exec, floor(args.at(0).toNumber(exec)));
9dae56ea
A		 159}
160
ba379fdc 161JSValue JSC_HOST_CALL mathProtoFuncLog(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 162{
f9bf01c6 163 return jsDoubleNumber(exec, log(args.at(0).toNumber(exec)));
9dae56ea
A		 164}
165
ba379fdc 166JSValue JSC_HOST_CALL mathProtoFuncMax(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea
A		 167{
168 unsigned argsCount = args.size();
169 double result = -Inf;
170 for (unsigned k = 0; k < argsCount; ++k) {
ba379fdc 171 double val = args.at(k).toNumber(exec);
9dae56ea
A		 172 if (isnan(val)) {
173 result = NaN;
174 break;
175 }
176 if (val > result || (val == 0 && result == 0 && !signbit(val)))
177 result = val;
178 }
179 return jsNumber(exec, result);
180}
181
ba379fdc 182JSValue JSC_HOST_CALL mathProtoFuncMin(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea
A		 183{
184 unsigned argsCount = args.size();
185 double result = +Inf;
186 for (unsigned k = 0; k < argsCount; ++k) {
ba379fdc 187 double val = args.at(k).toNumber(exec);
9dae56ea
A		 188 if (isnan(val)) {
189 result = NaN;
190 break;
191 }
192 if (val < result || (val == 0 && result == 0 && signbit(val)))
193 result = val;
194 }
195 return jsNumber(exec, result);
196}
197
ba379fdc 198JSValue JSC_HOST_CALL mathProtoFuncPow(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea
A		 199{
200 // ECMA 15.8.2.1.13
201
ba379fdc
A		 202 double arg = args.at(0).toNumber(exec);
203 double arg2 = args.at(1).toNumber(exec);
9dae56ea
A		 204
205 if (isnan(arg2))
206 return jsNaN(exec);
207 if (isinf(arg2) && fabs(arg) == 1)
208 return jsNaN(exec);
209 return jsNumber(exec, pow(arg, arg2));
210}
211
ba379fdc 212JSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState* exec, JSObject*, JSValue, const ArgList&)
9dae56ea 213{
4e4e5a6f 214 return jsDoubleNumber(exec, exec->lexicalGlobalObject()->weakRandomNumber());
9dae56ea
A		 215}
216
ba379fdc 217JSValue JSC_HOST_CALL mathProtoFuncRound(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 218{
ba379fdc 219 double arg = args.at(0).toNumber(exec);
4e4e5a6f
A		 220 double integer = ceil(arg);
221 return jsNumber(exec, integer - (integer - arg > 0.5));
9dae56ea
A		 222}
223
ba379fdc 224JSValue JSC_HOST_CALL mathProtoFuncSin(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 225{
4e4e5a6f 226 return exec->globalData().cachedSin(exec, args.at(0).toNumber(exec));
9dae56ea
A		 227}
228
ba379fdc 229JSValue JSC_HOST_CALL mathProtoFuncSqrt(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 230{
f9bf01c6 231 return jsDoubleNumber(exec, sqrt(args.at(0).toNumber(exec)));
9dae56ea
A		 232}
233
ba379fdc 234JSValue JSC_HOST_CALL mathProtoFuncTan(ExecState* exec, JSObject*, JSValue, const ArgList& args)
9dae56ea 235{
f9bf01c6 236 return jsDoubleNumber(exec, tan(args.at(0).toNumber(exec)));
9dae56ea
A		 237}
238
239} // namespace JSC
mirror of JavaScriptCore