stream_gribapi.c 54.5 KB
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#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <stdio.h>

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#include "dmemory.h"
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#include "cdi.h"
#include "stream_int.h"
#include "file.h"
#include "varscan.h"
#include "datetime.h"
#include "vlist.h"
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#include "stream_grb.h"
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#include "gribapi.h"

#if  defined  (HAVE_LIBGRIB_API)
#  if  defined  (HAVE_LIBCGRIBEX)
#  include "cgribex.h"      /* gribGetSize, gribRead, gribGetZip */
#  endif
#  include "grib_api.h"
#endif


extern int cdiInventoryMode;

typedef struct {
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  int param;
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  int level1;
  int level2;
  int ltype;
} compvar2_t; 


#if  defined  (HAVE_LIBGRIB_API)
static
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int gribapiGetGridType(grib_handle *gh, int gribgridtype)
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{
  /*  static char func[] = "gribapiGetGridType"; */
  int gridtype = 0;
  long lpar;

  GRIB_CHECK(grib_get_long(gh, "gridDefinitionTemplateNumber", &lpar), 0);
  gribgridtype = (int) lpar;

  switch (gribgridtype)
    {
    case  GRIBAPI_GTYPE_LATLON:
    case  GRIBAPI_GTYPE_LATLON_ROT:
      {
	gridtype = GRID_LONLAT;
	break;
      }
    case  GRIBAPI_GTYPE_LCC:
      {
	gridtype = GRID_LCC;
	break;
      }
    case  GRIBAPI_GTYPE_GAUSSIAN:
      {
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	long lpar;
	GRIB_CHECK(grib_get_long(gh, "Ni", &lpar), 0);
	if ( lpar < 0 )
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	  gridtype = GRID_GAUSSIAN_REDUCED;
	else
	  gridtype = GRID_GAUSSIAN;
	break;
      }
    case  GRIBAPI_GTYPE_SPECTRAL:
      {
	gridtype = GRID_SPECTRAL;
	break;
      }
    case  GRIBAPI_GTYPE_GME:
      {
	gridtype = GRID_GME;
	break;
      }
    default:
      {
	gridtype = GRID_GENERIC;
	break;
      }
    }

  return (gridtype);
}
#endif

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static
int gribapiGetIsRotated(int gribgridtype)
{
  /*  static char func[] = "cgribexGetIsRotated"; */
  int isRotated = 0;

  if ( gribgridtype == GRIBAPI_GTYPE_LATLON_ROT )
    {
      isRotated = 1;
    }

  return (isRotated);
}


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#if  defined  (HAVE_LIBGRIB_API)
static
int gribapiGetZaxisType(int grb_ltype)
{
  int zaxistype = 0;

  switch ( grb_ltype )
    {
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    case GRIBAPI_LTYPE_SURFACE:
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      {
	zaxistype = ZAXIS_SURFACE;
	break;
      }
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    case GRIBAPI_LTYPE_MEANSEA:
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      {
	zaxistype = ZAXIS_MEANSEA;
	break;
      }
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    case GRIBAPI_LTYPE_ISOBARIC:
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      {
	zaxistype = ZAXIS_PRESSURE;
	break;
      }
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    case GRIBAPI_LTYPE_HEIGHT:
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      {
	zaxistype = ZAXIS_HEIGHT;
	break;
      }
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    case GRIBAPI_LTYPE_ALTITUDE:
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      {
	zaxistype = ZAXIS_ALTITUDE;
	break;
      }
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    case GRIBAPI_LTYPE_SIGMA:
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      {
	zaxistype = ZAXIS_SIGMA;
	break;
      }
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    case GRIBAPI_LTYPE_HYBRID:
      //case GRIBAPI_LTYPE_HYBRID_LAYER:
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      {
	zaxistype = ZAXIS_HYBRID;
	break;
      }
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    case GRIBAPI_LTYPE_LANDDEPTH:
      //case GRIBAPI_LTYPE_LANDDEPTH_LAYER:
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      {
	zaxistype = ZAXIS_DEPTH_BELOW_LAND;
	break;
      }
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    case GRIBAPI_LTYPE_ISENTROPIC:
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      {
	zaxistype = ZAXIS_ISENTROPIC;
	break;
      }
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    case GRIBAPI_LTYPE_SEADEPTH:
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      {
	zaxistype = ZAXIS_DEPTH_BELOW_SEA;
	break;
      }
    default:
      {
	zaxistype = ZAXIS_GENERIC;
	break;
      }
    }

  return (zaxistype);
}
#endif

#if  defined  (HAVE_LIBGRIB_API)
static
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void gribapiAddRecord(int streamID, int param, grib_handle *gh,
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		      long recsize, off_t position, int prec, int ztype)
{
  static char func[] = "gribapiAddRecord";
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  int gribgridtype;
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  int gridtype;
  int zaxistype;
  int gridID = CDI_UNDEFID, varID;
  int levelID = 0;
  int tsID, recID;
  int level1, level2;
  int numavg;
  int lbounds = 0;
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  record_t *record;
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  grid_t grid;
  int vlistID;
  stream_t *streamptr;
  int leveltype;
  double dlevel;
  long lpar;
  int status;
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  long numberOfPoints;
  size_t datasize;
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  char name[256], longname[256], units[256];
  size_t vlen; 
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  streamptr = stream_to_pointer(streamID);

  vlistID = streamInqVlist(streamID);
  tsID    = streamptr->curTsID;
  recID   = recordNewEntry(streamID, tsID);
  record  = &streamptr->tsteps[tsID].records[recID];

  // numavg  = ISEC1_AvgNum;
  numavg  = 0;
  /*
  level1  = ISEC1_Level1;
  level2  = ISEC1_Level2;
  */
  status = grib_get_long(gh, "typeOfFirstFixedSurface", &lpar);
  if ( status == 0 )
    {
      leveltype = (int) lpar;
      GRIB_CHECK(grib_get_double(gh, "level", &dlevel), 0);
      if ( leveltype == 100 ) dlevel *= 100;
      if ( dlevel < -2.e9 || dlevel > 2.e9 ) dlevel = 0;
    }
  else 
    {
      leveltype = 0;
      dlevel = 0;
    }

  level1 = (int) dlevel;
  level2 = 0;

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  /* fprintf(stderr, "param %d %d %d %d\n", param, level1, level2, ISEC1_LevelType); */
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  (*record).size     = recsize;
  (*record).position = position;
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  (*record).param    = param;
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  (*record).ilevel   = level1;
  (*record).ilevel2  = level2;
  (*record).ltype    = leveltype;

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  GRIB_CHECK(grib_get_long(gh, "gridDefinitionTemplateNumber", &lpar), 0);
  gribgridtype = (int) lpar;
  gridtype = gribapiGetGridType(gh, gribgridtype);
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  /*
  if ( streamptr->unreduced && gridtype == GRID_GAUSSIAN_REDUCED )
    {
      gridtype = GRID_GAUSSIAN;
      ISEC2_NumLon = 2*ISEC2_NumLat;
      ISEC4_NumValues = ISEC2_NumLon*ISEC2_NumLat;
    }
  */
  memset(&grid, 0, sizeof(grid_t));

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  GRIB_CHECK(grib_get_size(gh, "values", &datasize), 0);
  GRIB_CHECK(grib_get_long(gh, "numberOfPoints", &numberOfPoints), 0);

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  switch (gridtype)
    {
    case GRID_LONLAT:
    case GRID_GAUSSIAN:
      {
	int nlon, nlat;

	GRIB_CHECK(grib_get_long(gh, "Ni", &lpar), 0);
	nlon = lpar;
	GRIB_CHECK(grib_get_long(gh, "Nj", &lpar), 0);
	nlat = lpar;

	if ( numberOfPoints != nlon*nlat )
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	  Error(func, "numberOfPoints (%d) and gridSize (%d) differ!",
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		(int)numberOfPoints, nlon*nlat);
	grid.size  = numberOfPoints;
	grid.xsize = nlon;
	grid.ysize = nlat;
	grid.xinc  = 0;
	grid.yinc  = 0;
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	GRIB_CHECK(grib_get_double(gh, "longitudeOfFirstGridPointInDegrees", &grid.xfirst), 0);
	GRIB_CHECK(grib_get_double(gh, "longitudeOfLastGridPointInDegrees",  &grid.xlast), 0);
	GRIB_CHECK(grib_get_double(gh, "latitudeOfFirstGridPointInDegrees",  &grid.yfirst), 0);
	GRIB_CHECK(grib_get_double(gh, "latitudeOfLastGridPointInDegrees",   &grid.ylast), 0);
	GRIB_CHECK(grib_get_double(gh, "iDirectionIncrementInDegrees", &grid.xinc), 0);
	if ( gridtype == GRID_LONLAT )
	  GRIB_CHECK(grib_get_double(gh, "jDirectionIncrementInDegrees", &grid.yinc), 0);

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	if ( IS_EQUAL(grid.xinc, GRIB_MISSING_DOUBLE) ) grid.xinc = 0;

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        if ( IS_NOT_EQUAL(grid.xfirst, 0) || IS_NOT_EQUAL(grid.xlast, 0) )
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	  {
	    if ( grid.xsize > 1 )
	      {
		/*
		if ( ISEC2_ResFlag && ISEC2_LonIncr > 0 )
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		  grid.xinc = ISEC2_LonIncr;
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		else
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		  grid.xinc = (ISEC2_LastLon - ISEC2_FirstLon) / (grid.xsize - 1);
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		*/
		/* correct xinc if necessary */
		/*
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		if ( ISEC2_FirstLon == 0 && ISEC2_LastLon > 354 )
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		  {
		    double xinc = 360. / grid.xsize;

		    if ( fabs(grid.xinc-xinc) > 0.0 )
		      {
			grid.xinc = xinc;
			if ( CDI_Debug ) Message(func, "set xinc to %g", grid.xinc);
		      }
		  }
		*/
	      }
	    grid.xdef   = 2;	    
	  }
	grid.ydef  = 0;
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        if ( IS_NOT_EQUAL(grid.yfirst, 0) || IS_NOT_EQUAL(grid.ylast, 0) )
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	  {
	    if ( grid.ysize > 1 )
	      {
		/*
		if ( ISEC2_ResFlag && ISEC2_LatIncr > 0 )
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		  grid.yinc = ISEC2_LatIncr;
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		else
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		  grid.yinc = (ISEC2_LastLat - ISEC2_FirstLat) / (grid.ysize - 1);
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		*/
	      }
	    grid.ydef   = 2;	    
	  }
	break;
      }
      /*
    case GRID_GAUSSIAN_REDUCED:
      {
	grid.size   = ISEC4_NumValues;
        grid.rowlon = ISEC2_RowLonPtr;
	grid.ysize  = ISEC2_NumLat;
	grid.xinc  = 0;
	grid.yinc  = 0;
	grid.xdef  = 0;
	  {
	    if ( grid.xsize > 1 )
	      {
		if ( ISEC2_ResFlag && ISEC2_LonIncr > 0 )
		  grid.xinc = ISEC2_LonIncr * 0.001;
		else
		  grid.xinc = (ISEC2_LastLon - ISEC2_FirstLon) * 0.001 / (grid.xsize - 1);
	      }
	    grid.xfirst = ISEC2_FirstLon * 0.001;
	    grid.xlast  = ISEC2_LastLon  * 0.001;
	    grid.xdef   = 2;	    
	  }
	grid.ydef  = 0;
	  {
	    if ( grid.ysize > 1 )
	      {
		if ( ISEC2_ResFlag && ISEC2_LatIncr > 0 )
		  grid.yinc = ISEC2_LatIncr * 0.001;
		else
		  grid.yinc = (ISEC2_LastLat - ISEC2_FirstLat) * 0.001 / (grid.ysize - 1);
	      }
	    grid.yfirst = ISEC2_FirstLat * 0.001;
	    grid.ylast  = ISEC2_LastLat  * 0.001;
	    grid.ydef   = 2;	    
	  }
	break;
      }
    case GRID_LCC:
      {
	if ( ISEC4_NumValues != ISEC2_NumLon*ISEC2_NumLat )
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	  Error(func, "numberOfPoints (%d) and gridSize (%d) differ!",
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		ISEC4_NumValues, ISEC2_NumLon*ISEC2_NumLat);

	grid.size  = ISEC4_NumValues;
	grid.xsize = ISEC2_NumLon;
	grid.ysize = ISEC2_NumLat;

	grid.lcc_xinc      = ISEC2_Lambert_dx;
	grid.lcc_yinc      = ISEC2_Lambert_dy;
	grid.lcc_originLon = ISEC2_FirstLon * 0.001;
	grid.lcc_originLat = ISEC2_FirstLat * 0.001;
	grid.lcc_lonParY   = ISEC2_Lambert_Lov * 0.001;
	grid.lcc_lat1      = ISEC2_Lambert_LatS1 * 0.001;
	grid.lcc_lat2      = ISEC2_Lambert_LatS2 * 0.001;
	grid.lcc_projflag  = ISEC2_Lambert_ProjFlag;
	grid.lcc_scanflag  = ISEC2_ScanFlag;

	grid.xdef   = 0;	    
	grid.ydef   = 0;

	break;
      }
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      */
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    case GRID_SPECTRAL:
      {
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	grid.size  = datasize;
	GRIB_CHECK(grib_get_long(gh, "J", &lpar), 0);
	grid.trunc = lpar;
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	break;
      }
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      /*
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    case GRID_GME:
      {
	grid.size  = ISEC4_NumValues;
	grid.nd    = ISEC2_GME_ND;
	grid.ni    = ISEC2_GME_NI;
	grid.ni2   = ISEC2_GME_NI2;
	grid.ni3   = ISEC2_GME_NI3;
	break;
      }
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      */
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    case GRID_GENERIC:
      {
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	int nlon = 0, nlat = 0;

	if ( grib_get_long(gh, "Ni", &lpar) == 0 ) nlon = lpar;
	if ( grib_get_long(gh, "Nj", &lpar) == 0 ) nlat = lpar;

	grid.size  = numberOfPoints;
	if ( nlon && nlat )
	  {
	    grid.xsize = nlon;
	    grid.ysize = nlat;
	  }
	else
	  {
	    grid.xsize = 0;
	    grid.ysize = 0;
	  }

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	break;
      }
    default:
      {
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	Error(func, "%s grid unsupported!", gridNamePtr(gridtype));
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	break;
      }
    }

  grid.isRotated = FALSE;
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  if ( gribapiGetIsRotated(gribgridtype) )
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    {
      grid.isRotated = TRUE;
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      GRIB_CHECK(grib_get_double(gh, "latitudeOfSouthernPoleInDegrees",  &grid.ypole), 0);
      GRIB_CHECK(grib_get_double(gh, "longitudeOfSouthernPoleInDegrees", &grid.xpole), 0);
      GRIB_CHECK(grib_get_double(gh, "angleOfRotation", &grid.angle), 0);
      /* change from south to north pole */
      grid.ypole = -grid.ypole;
      grid.xpole =  grid.xpole - 180;
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    }
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  grid.xvals = NULL;
  grid.yvals = NULL;
  grid.type  = gridtype;

  gridID = varDefGrid(vlistID, grid, 0);

  zaxistype = gribapiGetZaxisType(leveltype);
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  if ( zaxistype == ZAXIS_HYBRID )
    {
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      int vctsize;
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      size_t dummy;
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      double *vctptr;
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      GRIB_CHECK(grib_get_long(gh, "NV", &lpar), 0);
      vctsize = lpar;
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      if ( vctsize > 0 )
	{
	  vctptr = (double *) malloc(vctsize*sizeof(double));
	  dummy = vctsize;
	  GRIB_CHECK(grib_get_double_array(gh, "pv", vctptr, &dummy), 0);
	  varDefVCT(vctsize, vctptr);
	  free(vctptr);
	}
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    }
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  //lbounds = cgribexGetZaxisHasBounds(ISEC1_LevelType);

  if ( prec > 32 ) prec = DATATYPE_PACK32;
  if ( prec <  0 ) prec = DATATYPE_PACK;

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  vlen = 256;
  GRIB_CHECK(grib_get_string(gh, "shortName", name, &vlen), 0);
  if ( vlen == 8 && memcmp(name, "unknown", vlen) == 0 ) name[0] = 0;
  vlen = 256;
  GRIB_CHECK(grib_get_string(gh, "name", longname, &vlen), 0);
  if ( vlen == 8 && memcmp(longname, "unknown", vlen) == 0 ) longname[0] = 0;
  vlen = 256;
  GRIB_CHECK(grib_get_string(gh, "units", units, &vlen), 0);
  if ( vlen == 8 && memcmp(units, "unknown", vlen) == 0 ) units[0] = 0;
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  // fprintf(stderr, "param %d name %s %s %s\n", param, name, longname, units); 
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  varAddRecord(recID, param, gridID, zaxistype, lbounds, level1, level2,
	       prec, &varID, &levelID, numavg, leveltype,
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	       name, longname, units);
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  (*record).varID   = varID;
  (*record).levelID = levelID;

  varDefZtype(varID, ztype);

  if ( varInqInst(varID) == CDI_UNDEFID )
    {
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      long center, subcenter;
      int instID;
      GRIB_CHECK(grib_get_long(gh, "centre", &center), 0);
      GRIB_CHECK(grib_get_long(gh, "subCentre", &subcenter), 0);
      instID    = institutInq((int)center, (int)subcenter, NULL, NULL);
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      if ( instID == CDI_UNDEFID )
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	instID = institutDef((int)center, (int)subcenter, NULL, NULL);
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      varDefInst(varID, instID);
    }

  if ( varInqModel(varID) == CDI_UNDEFID )
    {
      int modelID;
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      long processID;
      GRIB_CHECK(grib_get_long(gh, "generatingProcessIdentifier", &processID), 0);
      modelID = modelInq(varInqInst(varID), processID, NULL);
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      if ( modelID == CDI_UNDEFID )
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	modelID = modelDef(varInqInst(varID), processID, NULL);
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      varDefModel(varID, modelID);
    }

  if ( varInqTable(varID) == CDI_UNDEFID )
    {
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      int pdis, pcat, pnum;
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      cdiDecodeParam(param, &pdis, &pcat, &pnum);
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      if ( pdis == 255 )
	{
	  int tableID;
	  int tabnum = pcat;
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	  tableID = tableInq(varInqModel(varID), tabnum, NULL);
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	  if ( tableID == CDI_UNDEFID )
	    tableID = tableDef(varInqModel(varID), tabnum, NULL);
	  varDefTable(varID, tableID);
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	}
    }

  streamptr->tsteps[tsID].nallrecs++;
  streamptr->nrecs++;

  if ( CDI_Debug )
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    Message(func, "varID = %d  param = %d  zaxistype = %d  gridID = %d  levelID = %d",
	    varID, param, zaxistype, gridID, levelID);
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}
#endif

void gribapiScanTimestep1(int streamID)
{
  static char func [] = "gribapiScanTimestep1";
#if  defined  (HAVE_LIBGRIB_API)
  off_t recpos = 0;
  unsigned char *gribbuffer = NULL;
  long buffersize = 0;
  int iret = 0, ipunp = 0, iword = 0;
  int status;
  int fileID;
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  int rtabnum = 0;
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  int rcode = 0, level1 = 0, level2 = 0, vdate = 0, vtime = 0;
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  int param = 0;
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  DateTime datetime, datetime0;
  int tsID;
  int varID;
  size_t readsize;
  int nrecords, nrecs, recID;
  int prec;
  long recsize = 0;
  int warn_time = TRUE;
  int warn_numavg = TRUE;
  int taxisID = -1;
  int rdate = 0, rtime = 0, tunit = 0, fcast = 0;
  TAXIS *taxis;
  int vlistID;
  int ztype;
  long unzipsize;
  compvar2_t compVar, compVar0;
  stream_t *streamptr;
  grib_handle *gh = NULL;
  int leveltype;
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  int pdis = 0, pcat = 0, pnum = 0;
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  long editionNumber;
  long lpar;
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  int bitsPerValue;
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  double dlevel = 0;

  streamptr = stream_to_pointer(streamID);

  stream_check_ptr(func, streamptr);

  streamptr->curTsID = 0;

  tsID  = tstepsNewEntry(streamID);
  taxis = &streamptr->tsteps[tsID].taxis;

  if ( tsID != 0 )
    Error(func, "Internal problem! tstepsNewEntry returns %d", tsID);

  fileID = streamInqFileID(streamID);

  nrecs = 0;
  while ( TRUE )
    {
      recsize = gribGetSize(fileID);
      recpos  = fileGetPos(fileID);

      if ( recsize == 0 )
	{
	  streamptr->ntsteps = 1;
	  break;
	}
      if ( recsize > buffersize )
	{
	  buffersize = recsize;
	  gribbuffer = (unsigned char *) realloc(gribbuffer, buffersize);
	}

      readsize = recsize;
      status = gribRead(fileID, gribbuffer, &readsize);
      if ( status ) break;

      ztype = COMPRESS_NONE;
      if ( gribGetZip(recsize, gribbuffer, &unzipsize) > 0 )
	{
	  ztype = COMPRESS_SZIP;
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	  unzipsize += 100;
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	  if ( (long) buffersize < unzipsize )
	    {
	      buffersize = unzipsize;
	      gribbuffer = (unsigned char *) realloc(gribbuffer, buffersize);
	    }
	}

      gh = grib_handle_new_from_message(NULL, (void *) gribbuffer, recsize);
      GRIB_CHECK(grib_set_double(gh, "missingValue", GRIB_MISSVAL), 0);

      GRIB_CHECK(grib_get_long(gh, "editionNumber", &editionNumber), 0);

      if ( editionNumber <= 1 )
	{
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	  GRIB_CHECK(grib_get_long(gh, "table2Version", &lpar), 0);
	  rtabnum = (int) lpar;
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	  GRIB_CHECK(grib_get_long(gh, "indicatorOfParameter", &lpar), 0);
	  rcode = (int) lpar;
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	  param = cdiEncodeParam(255, rtabnum, rcode);

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	  status = grib_get_long(gh, "indicatorOfTypeOfLevel", &lpar);
	  if ( status == 0 )
	    {
	      leveltype = (int) lpar;
	      GRIB_CHECK(grib_get_double(gh, "level", &dlevel), 0);
	      if ( leveltype == 100 ) dlevel *= 100;
	      if ( dlevel < -2.e9 || dlevel > 2.e9 ) dlevel = 0;
	    }
	  else 
	    {
	      leveltype = 0;
	      dlevel = 0;
	    }
	}
      else
	{
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	  size_t len = 256;
	  char typeOfPacking[256];
	  GRIB_CHECK(grib_get_string(gh, "typeOfPacking", typeOfPacking, &len), 0);
	  // fprintf(stderr, "typeOfPacking %d %s\n", len, typeOfPacking);
	  if ( strncmp(typeOfPacking, "grid_jpeg", len) == 0 ) ztype = COMPRESS_JPEG;
	  
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	  GRIB_CHECK(grib_get_long(gh, "discipline", &lpar), 0);
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	  pdis = (int) lpar;

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	  GRIB_CHECK(grib_get_long(gh, "parameterCategory", &lpar), 0);
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	  pcat = (int) lpar;
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	  GRIB_CHECK(grib_get_long(gh, "parameterNumber", &lpar), 0);
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	  pnum = (int) lpar;

	  param = cdiEncodeParam(pdis, pcat, pnum);
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	  status = grib_get_long(gh, "typeOfFirstFixedSurface", &lpar);
	  if ( status == 0 )
	    {
	      leveltype = (int) lpar;
	      GRIB_CHECK(grib_get_double(gh, "level", &dlevel), 0);
	      if ( leveltype == 100 ) dlevel *= 100;
	      if ( dlevel < -2.e9 || dlevel > 2.e9 ) dlevel = 0;
	    }
	  else 
	    {
	      leveltype = 0;
	      dlevel = 0;
	    }
	}

      level1 = (int) dlevel;
      level2 = 0;

      GRIB_CHECK(grib_get_long(gh, "dataDate", &lpar), 0);
      vdate = (int) lpar;
      GRIB_CHECK(grib_get_long(gh, "dataTime", &lpar), 0);
      vtime = (int) lpar*100;

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      GRIB_CHECK(grib_get_long(gh,"bitsPerValue", &lpar),0);
      bitsPerValue = (int) lpar;
      if ( bitsPerValue > 0 && bitsPerValue <= 32 )
	prec = bitsPerValue;
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      else
        prec = DATATYPE_PACK;
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      if ( nrecs == 0 )
	{
	  datetime0.date = vdate;
	  datetime0.time = vtime;
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	  rdate = 0;
	  rtime = 0;
	  tunit = 0;
	  fcast = 0;
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	  /*
	  rdate = gribRefDate(isec1);
	  rtime = gribRefTime(isec1);
	  tunit = cgribexGetTimeUnit(isec1);
	  fcast = gribTimeIsFC(isec1);
	  */
	}
      else
	{
	  datetime.date  = vdate;
	  datetime.time  = vtime;
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	  compVar.param  = param;
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          compVar.level1 = level1;
          compVar.level2 = level2;
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	  compVar.ltype  = leveltype;

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	  for ( recID = 0; recID < nrecs; recID++ )
	    {
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	      compVar0.param  = streamptr->tsteps[0].records[recID].param;
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	      compVar0.level1 = streamptr->tsteps[0].records[recID].ilevel;
	      compVar0.level2 = streamptr->tsteps[0].records[recID].ilevel2;
	      compVar0.ltype  = streamptr->tsteps[0].records[recID].ltype;

	      if ( memcmp(&compVar0, &compVar, sizeof(compvar2_t)) == 0 ) break;
	    }

	  if ( cdiInventoryMode == 1 )
	    {
	      if ( recID < nrecs ) break;
	      if ( warn_time )
		if ( memcmp(&datetime, &datetime0, sizeof(DateTime)) != 0 )
		  {
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		    Warning(func, "Inconsistent verification time (param %d level %d)", param, level1);
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		    warn_time = FALSE;
		  }
	    }
	  else
	    {
	      if ( memcmp(&datetime, &datetime0, sizeof(DateTime)) != 0 ) break;

	      if ( recID < nrecs )
		{
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		  Warning(func, "Param %d level %d already exist, skipped!", param, level1);
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		  continue;
		}
	    }
	}
      /*
      if ( ISEC1_AvgNum )
	{
	  if (  taxis->numavg && warn_numavg && (taxis->numavg != ISEC1_AvgNum) )
	    {
	      Message(func, "Change numavg from %d to %d not allowed!",
		      taxis->numavg, ISEC1_AvgNum);
	      warn_numavg = FALSE;
	    }
	  else
	    {
	      taxis->numavg = ISEC1_AvgNum;
	    }
	}
      */
      nrecs++;

      if ( CDI_Debug )
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	Message(func, "%4d %8d %4d  %8d %8d %6d", nrecs, (int)recpos, param, level1, vdate, vtime);
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      gribapiAddRecord(streamID, param, gh, recsize, recpos, prec, ztype);
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    }

  streamptr->rtsteps = 1;

  cdiGenVars(streamID);

  if ( fcast )
    {
      taxisID = taxisCreate(TAXIS_RELATIVE);
      taxis->type  = TAXIS_RELATIVE;
      taxis->rdate = rdate;
      taxis->rtime = rtime;
      taxis->unit  = tunit;
    }
  else
    {
      taxisID = taxisCreate(TAXIS_ABSOLUTE);
      taxis->type  = TAXIS_ABSOLUTE;
      taxis->unit  = tunit;
    }

  taxis->vdate = datetime0.date;
  taxis->vtime = datetime0.time;

  vlistID = streamInqVlist(streamID);
  vlistDefTaxis(vlistID, taxisID);

  nrecords = streamptr->tsteps[0].nallrecs;
  if ( nrecords < streamptr->tsteps[0].recordSize )
    {
      streamptr->tsteps[0].recordSize = nrecords;
      streamptr->tsteps[0].records =
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      (record_t *) realloc(streamptr->tsteps[0].records, nrecords*sizeof(record_t));
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    }

  streamptr->tsteps[0].recIDs = (int *) malloc(nrecords*sizeof(int));
  streamptr->tsteps[0].nrecs = nrecords;
  for ( recID = 0; recID < nrecords; recID++ )
    streamptr->tsteps[0].recIDs[recID] = recID;

  streamptr->record->buffer     = gribbuffer;
  streamptr->record->buffersize = buffersize;

  if ( streamptr->ntsteps == -1 )
    {
      tsID = tstepsNewEntry(streamID);
      if ( tsID != streamptr->rtsteps )
	Error(func, "Internal error. tsID = %d", tsID);

      streamptr->tsteps[tsID-1].next   = TRUE;
      streamptr->tsteps[tsID].position = recpos;
    }

  if ( streamptr->ntsteps == 1 )
    {
      if ( taxis->vdate == 0 && taxis->vtime == 0 )
	{
	  streamptr->ntsteps = 0;
	  for ( varID = 0; varID < streamptr->nvars; varID++ )
	    {
	      vlistDefVarTime(vlistID, varID, TIME_CONSTANT);
	    }
	}
    }
#else
  Error(func, "GRIB_API support not compiled in!");
#endif
}


int gribapiScanTimestep2(int streamID)
{
  static char func [] = "gribapiScanTimestep2";
  int status = 0;
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#if  defined  (HAVE_LIBGRIB_API)
  off_t recpos = 0;
  unsigned char *gribbuffer = NULL;
  long buffersize = 0;
  int iret = 0, ipunp = 0, iword = 0;
  int fileID;
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  int rtabnum = 0;
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  int rcode = 0, level1 = 0, level2 = 0, vdate = 0, vtime = 0;
  DateTime datetime, datetime0;
  int tsID;
  int varID, gridID;
  size_t readsize;
  int nrecords, nrecs, recID, rindex;
  long recsize = 0;
  int warn_numavg = TRUE;
  int taxisID = -1;
  TAXIS *taxis;
  int vlistID;
  long unzipsize;
  compvar2_t compVar, compVar0;
  stream_t *streamptr;
  grib_handle *gh = NULL;
  int leveltype;
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  int pdis = 0, pcat = 0, pnum = 0;
  int param = 0;
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  long editionNumber;
  long lpar;
  double dlevel = 0;

  streamptr = stream_to_pointer(streamID);

  stream_check_ptr(func, streamptr);

  streamptr->curTsID = 1;

  fileID  = streamInqFileID(streamID);
  vlistID = streamInqVlist(streamID);
  taxisID = vlistInqTaxis(vlistID);

  gribbuffer = (unsigned char *) streamptr->record->buffer;
  buffersize = streamptr->record->buffersize;
                                          
  tsID = streamptr->rtsteps;
  if ( tsID != 1 )
    Error(func, "Internal problem! unexpeceted timestep %d", tsID+1);

  taxis = &streamptr->tsteps[tsID].taxis;

  fileSetPos(fileID, streamptr->tsteps[tsID].position, SEEK_SET);

  cdiCreateRecords(streamID, tsID);

  nrecords = streamptr->tsteps[tsID].nallrecs;
  streamptr->tsteps[1].recIDs = (int *) malloc(nrecords*sizeof(int));
  streamptr->tsteps[1].nrecs = 0;
  for ( recID = 0; recID < nrecords; recID++ )
    streamptr->tsteps[1].recIDs[recID] = -1;
      
  for ( recID = 0; recID < nrecords; recID++ )
    {
      varID = streamptr->tsteps[0].records[recID].varID;
      streamptr->tsteps[tsID].records[recID].position = 
	streamptr->tsteps[0].records[recID].position;
      streamptr->tsteps[tsID].records[recID].size     = 
	streamptr->tsteps[0].records[recID].size;
    }

  rindex = 0;
  while ( TRUE )
    {
      if ( rindex > nrecords ) break;

      recsize = gribGetSize(fileID);
      recpos  = fileGetPos(fileID);
      if ( recsize == 0 )
	{
	  streamptr->ntsteps = 2;
	  break;
	}
      if ( recsize > buffersize )
	{
	  buffersize = recsize;
	  gribbuffer = (unsigned char *) realloc(gribbuffer, (size_t)buffersize);
	}

      readsize = recsize;
      status = gribRead(fileID, gribbuffer, &readsize);
      if ( status ) break;

      if ( gribGetZip(recsize, gribbuffer, &unzipsize) > 0 )
	{
	  unzipsize += 100; /* need 0 to 1 bytes for rounding of bds */
	  if ( (long) buffersize < unzipsize )
	    {
	      buffersize = unzipsize;
	      gribbuffer = (unsigned char *) realloc(gribbuffer, buffersize);
	    }
	}

      gh = grib_handle_new_from_message(NULL, (void *) gribbuffer, recsize);
      GRIB_CHECK(grib_set_double(gh, "missingValue", GRIB_MISSVAL), 0);

      GRIB_CHECK(grib_get_long(gh, "editionNumber", &editionNumber), 0);

      if ( editionNumber <= 1 )
	{
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	  GRIB_CHECK(grib_get_long(gh, "table2Version", &lpar), 0);
	  rtabnum = (int) lpar;
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	  GRIB_CHECK(grib_get_long(gh, "indicatorOfParameter", &lpar), 0);
	  rcode = (int) lpar;
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	  param = cdiEncodeParam(255, rtabnum, rcode);

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	  status = grib_get_long(gh, "indicatorOfTypeOfLevel", &lpar);
	  if ( status == 0 )
	    {
	      leveltype = (int) lpar;
	      GRIB_CHECK(grib_get_double(gh, "level", &dlevel), 0);
	      if ( leveltype == 100 ) dlevel *= 100;
	      if ( dlevel < -2.e9 || dlevel > 2.e9 ) dlevel = 0;
	    }
	  else 
	    {
	      leveltype = 0;
	      dlevel = 0;
	    }
	}
      else
	{
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	  GRIB_CHECK(grib_get_long(gh, "discipline", &lpar), 0);
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	  pdis = (int) lpar;
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	  GRIB_CHECK(grib_get_long(gh, "parameterCategory", &lpar), 0);
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	  pcat = (int) lpar;
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