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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2006-2008 - INRIA - Bruno JOFRET
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
*/
#include <math.h>
#include "lapack.h"
#include "tan.h"
#include "sqrt.h"
#include "cos.h"
#include "sinh.h"
#include "sin.h"
#include "log.h"
#include "abs.h"
#define localSign(x) x >= 0 ? 1.0f : -1.0f
floatComplex ctans(floatComplex z) {
float Temp = 0.0f;
float Lim = 1.0f + slogs(2.0f / ssqrts((float) getRelativeMachinePrecision()));
float RealIn = creals(z);
float ImagIn = cimags(z);
float RealOut = 0.0f;
float ImagOut = 0.0f;
Temp = powf(scoss(RealIn), 2.0f) + powf(ssinhs(ImagIn), 2.0f);
RealOut = 0.5f * ssins(2 * RealIn) / Temp;
if(sabss(ImagIn) < Lim)
{
ImagOut = 0.5f * ssinhs(2.0f * ImagIn) / Temp;
}
else
{
ImagOut = localSign(ImagIn);
}
return FloatComplex(RealOut, ImagOut);
}
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