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* This file is part of the GROMACS molecular simulation package.
*
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#ifndef GMX_MATH_GMXCOMPLEX_H
#define GMX_MATH_GMXCOMPLEX_H
#include <math.h>
#include "gromacs/math/vectypes.h"
#include "gromacs/utility/real.h"
typedef struct {
real re, im;
} t_complex;
typedef t_complex cvec[DIM];
static t_complex rcmul(real r, t_complex c)
{
t_complex d;
d.re = r*c.re;
d.im = r*c.im;
return d;
}
static t_complex rcexp(real r)
{
t_complex c;
c.re = (real)cos(r);
c.im = (real)sin(r);
return c;
}
static t_complex cadd(t_complex a, t_complex b)
{
t_complex c;
c.re = a.re+b.re;
c.im = a.im+b.im;
return c;
}
static t_complex csub(t_complex a, t_complex b)
{
t_complex c;
c.re = a.re-b.re;
c.im = a.im-b.im;
return c;
}
static t_complex cmul(t_complex a, t_complex b)
{
t_complex c;
c.re = a.re*b.re - a.im*b.im;
c.im = a.re*b.im + a.im*b.re;
return c;
}
static t_complex conjugate(t_complex c)
{
t_complex d;
d.re = c.re;
d.im = -c.im;
return d;
}
static real cabs2(t_complex c)
{
real abs2;
abs2 = (c.re*c.re)+(c.im*c.im);
return abs2;
}
static t_complex cdiv(t_complex teller, t_complex noemer)
{
t_complex res, anoemer;
anoemer = cmul(conjugate(noemer), noemer);
res = cmul(teller, conjugate(noemer));
return rcmul(1.0/anoemer.re, res);
}
#endif
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