#ifndef _LOAD_GADGET_DATA_H
#define _LOAD_GADGET_DATA_H


typedef struct io_header_1
{
  int      npart[6];
  double   mass[6];
  double   time;
  double   redshift;
  int      flag_sfr;
  int      flag_feedback;
  int      npartTotal[6];
  int      flag_cooling;
  int      num_files;
  double   BoxSize;
  double   Omega0;
  double   OmegaLambda;
  double   HubbleParam; 
  char     fill[256- 6*4- 6*8- 2*8- 2*4- 6*4- 2*4 - 4*8];  /* fills to 256 Bytes */
} GadgetHeader;

typedef struct particle_data 
{
  float  Pos[3];
  float  Init[3];
  float  Vel[3];
  float  VelInit[3];
  float  Mass;
  int    Type;

  float  Rho, U, Temp, Ne;
  int Id;
} ParticleState;

typedef struct {
  GadgetHeader header;
  ParticleState *particles;
  int NumPart;
  int ntot_withmasses;
} GadgetData;

typedef struct {
  int Ntypes;
  float BoxSize;
  float RedShift;
  char header[256 - 4 - 2*4];
} ParticleSetHeader;

typedef struct {
  ParticleSetHeader header;
  // Particle description
  int *Npart;
  ParticleState **particles;
} ParticleSet;

typedef float FCoordinates[3];

typedef struct {
  unsigned int NumPart;
  double BoxSize;
  FCoordinates *pos;
} PurePositionData;

#ifdef __cplusplus
extern "C" {
#endif

  void writeGadget(GadgetData *data, const char *fname);
  GadgetData *loadGadget(const char *fname);
  void freeGadget(GadgetData *data);

  GadgetData *loadSimulationData(const char *fname);
  GadgetData *loadHydra(const char *fname);

  void writePersoSet(ParticleSet *set, const char *fname);
  ParticleSet *loadPersoSet(const char *fname);
  void freePersoSet(ParticleSet *set);

#ifdef __cplusplus
}
#endif

#endif