/* complex/gsl_complex.h

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough

 * 

 * 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 3 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 */

#ifndef __GSL_COMPLEX_H__

#define __GSL_COMPLEX_H__

#undef __BEGIN_DECLS

#undef __END_DECLS

#ifdef __cplusplus

# define __BEGIN_DECLS extern "C" {

# define __END_DECLS }

#else

# define __BEGIN_DECLS /* empty */

# define __END_DECLS /* empty */

#endif

__BEGIN_DECLS

/* two consecutive built-in types as a complex number */

typedef double *       gsl_complex_packed ;

typedef float *        gsl_complex_packed_float  ;

typedef long double *  gsl_complex_packed_long_double ;

typedef const double *       gsl_const_complex_packed ;

typedef const float *        gsl_const_complex_packed_float  ;

typedef const long double *  gsl_const_complex_packed_long_double ;

/* 2N consecutive built-in types as N complex numbers */

typedef double *       gsl_complex_packed_array ;

typedef float *        gsl_complex_packed_array_float  ;

typedef long double *  gsl_complex_packed_array_long_double ;

typedef const double *       gsl_const_complex_packed_array ;

typedef const float *        gsl_const_complex_packed_array_float  ;

typedef const long double *  gsl_const_complex_packed_array_long_double ;

/* Yes... this seems weird. Trust us. The point is just that

   sometimes you want to make it obvious that something is

   an output value. The fact that it lacks a 'const' may not

   be enough of a clue for people in some contexts.

 */

typedef double *       gsl_complex_packed_ptr ;

typedef float *        gsl_complex_packed_float_ptr  ;

typedef long double *  gsl_complex_packed_long_double_ptr ;

typedef const double *       gsl_const_complex_packed_ptr ;

typedef const float *        gsl_const_complex_packed_float_ptr  ;

typedef const long double *  gsl_const_complex_packed_long_double_ptr ;

typedef struct

  {

    long double dat[2];

  }

gsl_complex_long_double;

typedef struct

  {

    double dat[2];

  }

gsl_complex;

typedef struct

  {

    float dat[2];

  }

gsl_complex_float;

#define GSL_REAL(z)     ((z).dat[0])

#define GSL_IMAG(z)     ((z).dat[1])

#define GSL_COMPLEX_P(zp) ((zp)->dat)

#define GSL_COMPLEX_P_REAL(zp)  ((zp)->dat[0])

#define GSL_COMPLEX_P_IMAG(zp)  ((zp)->dat[1])

#define GSL_COMPLEX_EQ(z1,z2) (((z1).dat[0] == (z2).dat[0]) && ((z1).dat[1] == (z2).dat[1]))

#define GSL_SET_COMPLEX(zp,x,y) do {(zp)->dat[0]=(x); (zp)->dat[1]=(y);} while(0)

#define GSL_SET_REAL(zp,x) do {(zp)->dat[0]=(x);} while(0)

#define GSL_SET_IMAG(zp,y) do {(zp)->dat[1]=(y);} while(0)

#define GSL_SET_COMPLEX_PACKED(zp,n,x,y) do {*((zp)+2*(n))=(x); *((zp)+(2*(n)+1))=(y);} while(0)

__END_DECLS

#endif /* __GSL_COMPLEX_H__ */