gecko-dev/js/js2/jsmath.cpp

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C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the JavaScript 2 Prototype.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
#include <math.h>
#include "jsmath.h"
namespace JavaScript {
namespace JSMathClass {
using namespace JSTypes;
#ifndef M_E
#define M_E 2.7182818284590452354
#endif
#ifndef M_LOG2E
#define M_LOG2E 1.4426950408889634074
#endif
#ifndef M_LOG10E
#define M_LOG10E 0.43429448190325182765
#endif
#ifndef M_LN2
#define M_LN2 0.69314718055994530942
#endif
#ifndef M_LN10
#define M_LN10 2.30258509299404568402
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880
#endif
#ifndef M_SQRT1_2
#define M_SQRT1_2 0.70710678118654752440
#endif
/*
Concept copied from SpiderMonkey -
fd_XXX needs to be defined either as a call to the fdlibm routine
or the native C library routine depending on the platform
*/
#define JS_USE_FDLIBM_MATH 0
#if !JS_USE_FDLIBM_MATH
/*
* Use system provided math routines.
*/
#define fd_acos acos
#define fd_asin asin
#define fd_atan atan
#define fd_atan2 atan2
#define fd_ceil ceil
#define fd_copysign copysign
#define fd_cos cos
#define fd_exp exp
#define fd_fabs fabs
#define fd_floor floor
#define fd_fmod fmod
#define fd_log log
#define fd_pow pow
#define fd_sin sin
#define fd_sqrt sqrt
#define fd_tan tan
#endif
static JSValue math_abs(Context *, const JSValues& argv)
{
if (argv.size() > 0) {
JSValue num = argv[1].toNumber();
if (num.isNaN()) return num;
if (num.isNegativeZero()) return kPositiveZero;
if (num.isNegativeInfinity()) return kPositiveInfinity;
if (num.f64 < 0) return JSValue(-num.f64);
return num;
}
return kUndefinedValue;
}
static JSValue math_acos(Context *, const JSValues& argv)
{
if (argv.size() > 0) {
JSValue num = argv[1].toNumber();
return JSValue(fd_acos(num.f64));
}
return kUndefinedValue;
}
static JSValue math_asin(Context *, const JSValues& argv)
{
if (argv.size() > 0) {
JSValue num = argv[1].toNumber();
return JSValue(fd_asin(num.f64));
}
return kUndefinedValue;
}
static JSValue math_atan(Context *, const JSValues& argv)
{
if (argv.size() > 0) {
JSValue num = argv[1].toNumber();
return JSValue(fd_atan(num.f64));
}
return kUndefinedValue;
}
static JSValue math_atan2(Context *, const JSValues& argv)
{
if (argv.size() > 1) {
JSValue num1 = argv[1].toNumber();
JSValue num2 = argv[1].toNumber();
return JSValue(fd_atan2(num1.f64, num2.f64));
}
return kUndefinedValue;
}
static JSValue math_ceil(Context *, const JSValues& argv)
{
if (argv.size() > 0) {
JSValue num = argv[1].toNumber();
return JSValue(fd_ceil(num.f64));
}
return kUndefinedValue;
}
struct MathFunctionEntry {
char *name;
JSNativeFunction::JSCode fn;
} MathFunctions[] = {
{ "abs", math_abs },
{ "acos", math_acos },
{ "asin", math_asin },
{ "atan", math_atan },
{ "atan2", math_atan2 },
{ "ceil", math_ceil },
{ "acos", math_acos },
{ "acos", math_acos }
};
struct MathConstantEntry {
char *name;
double value;
} MathConstants[] = {
{ "E", M_E },
{ "LOG2E", M_LOG2E },
{ "LOG10E", M_LOG10E },
{ "LN2", M_LN2 },
{ "LN10", M_LN10 },
{ "PI", M_PI },
{ "SQRT2", M_SQRT2 },
{ "SQRT1_2", M_SQRT1_2 }
};
// There is no constructor for Math, we simply initialize
// the properties of the Math object
void JSMath::initMathObject(JSScope *g)
{
uint i;
JSMath *m = new JSMath();
m->setClass(new JSString("Math"));
for (i = 0; i < sizeof(MathFunctions) / sizeof(MathFunctionEntry); i++)
m->setProperty(widenCString(MathFunctions[i].name), JSValue(new JSNativeFunction(MathFunctions[i].fn) ) );
for (i = 0; i < sizeof(MathConstants) / sizeof(MathConstantEntry); i++)
m->setProperty(widenCString(MathConstants[i].name), JSValue(MathConstants[i].value) );
g->setProperty(widenCString("Math"), JSValue(m));
}
} /* JSMathClass */
} /* JavaScript */