/usr/include/tjutils/tjcomplex.h is in libodin-dev 1.8.5-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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tjcomplex.h - description
-------------------
begin : Thu Jul 13 2000
copyright : (C) 2000 by Thies Jochimsen
email : jochimse@cns.mpg.de
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#ifndef TJCOMPLEX_H
#define TJCOMPLEX_H
#include <tjutils/tjutils.h>
#include <tjutils/tjstring.h>
/**
* @addtogroup tjutils
* @{
*/
/**
* Returns the complex number 'z' as a formatted string
*/
STD_string ctos(const STD_complex& z);
/**
* Parses an returns string 's' as complex number
*/
STD_complex stoc(const STD_string& s);
////////////////////////////////////////////////////////////
// functions for using complex numbers with Blitz++,
// even if the STD_complex class is not std::complex
inline STD_complex float2real(float a) {return STD_complex(a,0.0f);}
inline STD_complex float2imag(float b) {return STD_complex(0.0f,b);}
inline float creal(STD_complex c) {return c.real();}
inline float cimag(STD_complex c) {return c.imag();}
inline float cabs(STD_complex c) {return float(sqrt(c.real()*c.real()+c.imag()*c.imag()));} //{return STD_abs(c);} // std::abs produces inf with GCC4 on amd64
inline float phase(STD_complex c) {return STD_arg(c);}
inline STD_complex logc(STD_complex c) {return STD_log(c);}
inline STD_complex expc(STD_complex c) {return STD_exp(c);}
inline STD_complex conjc(STD_complex c) {return STD_conj(c);}
/**
* Comparison operator for the norm of the complex numbers c1 and c2
*/
inline bool operator < (const STD_complex& c1, const STD_complex& c2) {return STD_abs(c1)<STD_abs(c2);}
/**
* Comparison operator for the norm of the complex numbers c1 and c2
*/
inline bool operator > (const STD_complex& c1, const STD_complex& c2) {return STD_abs(c1)>STD_abs(c2);}
/** @}
*/
#endif
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