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/*
* Copyright (c) 2002-2006 Samit Basu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "Array.hpp"
#include "LAPACK.hpp"
#include "IEEEFP.hpp"
#include <math.h>
#include <float.h>
#include "Operators.hpp"
//@@Signature
//function i IFunction
//inputs none
//outputs y
//@@Signature
//function j IFunction
//inputs none
//outputs y
//DOCBLOCK constants_i
ArrayVector IFunction(int nargout, const ArrayVector& arg) {
return ArrayVector(Array(double(0),double(1)));
}
//@@Signature
//function pi PiFunction jitsafe
//inputs none
//outputs y
//DOCBLOCK constants_pi
ArrayVector PiFunction(int nargout, const ArrayVector& arg) {
return ArrayVector(Array(double(4.0*atan(1.0))));
}
JitScalarFunc0(pi,double(4.0*atan(1.0)));
//@@Signature
//function e EFunction jitsafe
//inputs none
//outputs y
//DOCBLOCK constants_e
ArrayVector EFunction(int nargout, const ArrayVector& arg) {
return ArrayVector(Array(exp(1.0)));
}
JitScalarFunc0(e,double(exp(1.0)));
struct OpEps {
static inline float func(float t) {
if (IsInfinite(t)) return NaN();
return fepsf(t);
}
static inline double func(double t) {
if (IsInfinite(t)) return NaN();
return feps(t);
}
static inline void func(float x, float y, float &rx, float &ry) {
rx = qMax(fepsf(x),fepsf(y));
ry = 0;
}
static inline void func(double x, double y, double &rx, double &ry) {
rx = qMax(feps(x),feps(y));
ry = 0;
}
};
//@@Signature
//function eps EpsFunction jitsafe
//inputs varargin
//outputs y
//DOCBLOCK constants_eps
ArrayVector EpsFunction(int nargout, const ArrayVector& arg) {
ArrayVector retval;
if( arg.size()> 1 )
throw Exception("eps takes no more than 1 argument");
if( arg.size()==1 ){
Array a( arg[0] );
if( a.isString() ){
QString str = a.asString().toLower();
if( str == QString( "double" ) ){
retval << Array( feps( 1. ) );
}
else if( str == QString( "single" ) ){
retval << Array( fepsf( 1. ) );
}
else{
throw Exception("Class must be 'double' or 'single'");
}
}
else { //numeric argument
return ArrayVector(Real(UnaryOp<OpEps>(a)));
}
} else{
retval << Array( feps( 1. ) );
}
return retval;
}
//@@Signature
//function feps FepsFunction
//inputs none
//outputs y
//DOCBLOCK constants_feps
ArrayVector FepsFunction(int nargout, const ArrayVector& arg) {
return ArrayVector(Array(float(nextafterf(1.0,2.0)-1.0f)));
}
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