/*
   This procedure opens and reads ACE MAG field browse data from a level 1
   HDF file.  Data records are read into a structure.

   This procedure was modified from its original source to be called
   from a Fortran main routine and pass back the data set contents
   as a structure array.

   Original source:  MAG_BR_RD.C - ACE Science Center
   Modifications:    port to VMS platform - Sandy Kramer, NASA/GSFC 10/21/97
                     incorporate ASC updates - SBK 12/11/98

*/

#include <stdio.h>
#include <string.h>

#include "magframe_out_br.h"
#include "df.h"
#include "mfhdf.h"

int rd_br(name, brdat, brcnt)

  char *name;
  struct MagFrm_out_br *brdat;
  int *brcnt;

{
  int32 hdf_fp, sd_id;
  struct MagFrm_out_br testdata;
  int ii,jj,retval;

  printf("ACE MAG field averages read routine\n");
  printf("File name is <%s>\n", name);

  if (name[0] == ' ')
    {
      printf("Usage: rd_hdf hdf_file\n");
      return(1);
    }

  /* open hdf input file */

  if ((hdf_fp=Hopen(name, DFACC_ALL, 0))==FAIL) {
      fprintf(stderr, "Hopen: could not open hdf file\n");
      return(-1);
    }
  printf("File successfully opened.\n");
  Vstart(hdf_fp);

  if ((sd_id=SDstart(name, DFACC_WRITE))==FAIL) {
      fprintf(stderr, "SDstart: could not open hdf file\n");
      return(-1);
    }
  if( init_rd_mag_br(hdf_fp, sd_id,"r") <=0) {
    fprintf(stderr,"No mag vector browse data\n");
    }

  ii=0;
  while((retval= read_mag_br(&testdata,ii))!=-1) {
     brdat[ii] = testdata;
/*
     printf("%4d bin_start = %f", ii,testdata.bin_start);
     printf("%4d ", testdata.iflag_out);
     printf("%e %e %e\n", testdata.b_out[0], testdata.b_out[1], 
     testdata.b_out[2]);
*/
     ii++;	
  }
  *brcnt = ii; 

/*   all done, close HDF file */

  close_rd_mag_br();
  Vend(hdf_fp);
  if (SDend(sd_id)==FAIL) {
      fprintf(stderr, "SDend: could not close hdf file\n");
      return(-1);
    }
  if (Hclose(hdf_fp)==FAIL) {
      fprintf(stderr, "Hclose: could not close hdf file\n");
      return(-1);
    }

  return(0);
}