stream_cgribex.c 62.5 KB
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#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <stdio.h>
#include <string.h>
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#include <math.h>   /* modf */
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#include <float.h>  /* FLT_EPSILON */
#include <sys/types.h>

#include "dmemory.h"
#include "cdi.h"
#include "stream_int.h"
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#include "cgribex.h"
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#include "file.h"
#include "varscan.h"
#include "datetime.h"
#include "taxis.h"
#include "vlist.h"


#undef  UNDEFID
#define UNDEFID  CDI_UNDEFID

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extern int cdiInventoryMode;
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int _readline_(FILE *fp, char *line, int len);


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typedef struct {
  int code;
  int table;
  int level1;
  int level2;
  int ltype;
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} compvar_t; 
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static
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int gribGetGridType(int *isec2)
{
  /*  static char func[] = "gribGetGridType"; */
  int gridtype = 0;

  switch (ISEC2_GridType)
    {
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    case  GTYPE_LATLON:
    case  GTYPE_LATLON_ROT:
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      {
	gridtype = GRID_LONLAT;
	break;
      }
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    case  GTYPE_LCC:
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      {
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	gridtype = GRID_LCC;
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	break;
      }
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    case  GTYPE_GAUSSIAN:
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      {
	if ( ISEC2_Reduced )
	  gridtype = GRID_GAUSSIAN_REDUCED;
	else
	  gridtype = GRID_GAUSSIAN;
	break;
      }
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    case  GTYPE_SPECTRAL:
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      {
	gridtype = GRID_SPECTRAL;
	break;
      }
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    case  GTYPE_GME:
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      {
	gridtype = GRID_GME;
	break;
      }
    default:
      {
	gridtype = GRID_GENERIC;
	break;
      }
    }

  return (gridtype);
}

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static
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int gribGetIsRotated(int *isec2)
{
  /*  static char func[] = "gribGetIsRotated"; */
  int isRotated = 0;

  if ( ISEC2_GridType == 10 )
    {
      isRotated = 1;
    }

  return (isRotated);
}


int grbInqRecord(int streamID, int *varID, int *levelID)
{
  static char func[] = "grbInqRecord";
  int status = 0;
  int fileID;
  void *gribbuffer;
  int iret = 0, iword = 0;
  int isec4size = 0;
  int isec0[2], isec1[4096], isec2[4096], isec3[2], isec4[512];
  double fsec2[512], fsec3[2], *fsec4 = NULL;
  int gridID = -1, zaxisID = -1;
  int gridtype;
  int gribsize;
  size_t readsize;
  int vlistID;
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  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);

  stream_check_ptr(func, streamptr);
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  vlistID  = streamInqVlist(streamID);
  fileID   = streamInqFileID(streamID);

  *varID   = -1;
  *levelID = -1;

  gribsize = gribGetSize(fileID);
  if ( gribsize == 0 ) return (0);

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  gribbuffer = streamptr->record->buffer;
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  gribbuffer = realloc(gribbuffer, gribsize);

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  streamptr->record->buffer = gribbuffer;
  streamptr->record->buffersize = gribsize;
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  readsize = gribsize;
  status = gribRead(fileID, (unsigned char *) gribbuffer, &readsize);
  if ( status ) return (-1);

  gribExDP(isec0, isec1, isec2, fsec2, isec3, fsec3, isec4, fsec4,
	   isec4size, (int *) gribbuffer, gribsize, &iword, "J", &iret);

  *varID = vlistInqVarID(vlistID, ISEC1_Parameter);

  if ( *varID == UNDEFID )
    Error(func, "code %d undefined", ISEC1_Parameter);

  gridID  = vlistInqVarGrid(vlistID, *varID);
  zaxisID = vlistInqVarZaxis(vlistID, *varID);

  gridtype = gribGetGridType(isec2);

  switch (gridtype)
    {
    case GRID_LONLAT:
      {
	if ( gridInqType(gridID) == GRID_TRAJECTORY )
	  {
	    double xfirst, yfirst;
	    xfirst = ISEC2_FirstLon * 0.001;
	    yfirst = ISEC2_FirstLat * 0.001;
	    gridDefXvals(gridID, &xfirst);
	    gridDefYvals(gridID, &yfirst);
	  }
	break;
      }
    case GRID_GAUSSIAN:
      {
	if ( ISEC4_NumValues != ISEC2_NumLon*ISEC2_NumLat )
	  Error(func, "wrong datasize! isec4len = %d isec2len = %d",
		ISEC4_NumValues, ISEC2_NumLon*ISEC2_NumLat);
	break;
      }
    case GRID_SPECTRAL:
    case GRID_GME:
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    case GRID_LCC:
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      {
	break;
      }
    default:
      {
	Error(func, "%s grid unsupported", gridNamePtr(gridtype));
	break;
      }
    }

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  streamptr->record->code     = ISEC1_Parameter;
  streamptr->record->level    = ISEC1_Level1;
  gribDateTime(isec1, &streamptr->record->date, &streamptr->record->time);
  streamptr->record->gridID   = gridID;
  streamptr->record->zaxisID  = zaxisID;
  streamptr->record->nrec++;
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  *levelID = zaxisInqLevelID(zaxisID, (double) ISEC1_Level1);

  status = 1;

  return (status);
}

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int grbDefRecord(int streamID)
{
  static char func[] = "grbDefRecord";
  int fileID;
  int gridID;
  int status = 0;
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  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);
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  stream_check_ptr(func, streamptr);
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  fileID = streamInqFileID(streamID);
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  gridID = streamptr->record->gridID;
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  return (status);
}

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static
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int grbDecodeDataDP(unsigned char *gribbuffer, int gribsize, double *data, int gridsize,
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		    int unreduced, int *nmiss, int *zip)
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{
  static char func[] = "grbDecodeDataDP";
  int status = 0;
  int iret = 0, iword = 0;
  int isec0[2], isec1[4096], isec2[4096], isec3[2], isec4[512];
  int izip;
  long unzipsize;
  double fsec2[512], fsec3[2];
  char hoper[2];

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  *zip = 0;

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  if ( unreduced ) strcpy(hoper, "R");
  else             strcpy(hoper, "D");

  FSEC3_MissVal = cdiDefaultMissval;

  if ( (izip = gribGetZip(gribsize, gribbuffer, &unzipsize)) > 0 )
    {
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          *zip = izip;
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	  if ( izip == 128 ) /* szip */
	    {
	      unsigned char *itmpbuffer = NULL;
	      size_t itmpbuffersize = 0;

	      if ( unzipsize < (long) gribsize )
		{
		  fprintf(stderr, "Decompressed size smaller than compressed size (in %d; out %ld)!\n",
			  gribsize, unzipsize);
		  return (status);
		}

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	      if ( itmpbuffersize < (size_t) gribsize )
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		{
		  itmpbuffersize = gribsize;
		  itmpbuffer = (unsigned char *) realloc(itmpbuffer, itmpbuffersize);
		}

	      memcpy(itmpbuffer, gribbuffer, itmpbuffersize);

	      unzipsize += 100; /* need 0 to 1 bytes for rounding of bds */

	      gribsize = gribUnzip(gribbuffer, unzipsize, itmpbuffer, gribsize);

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	      if ( gribsize <= 0 )
		Error(func, "Decompression problem!\n");
	   
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	      free(itmpbuffer);
	    }
	  else
	    {
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	      Error(func, "Decompression for %d not implemented!\n", izip);
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	    }
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    }

  gribExDP(isec0, isec1, isec2, fsec2, isec3, fsec3, isec4, data,
	   gridsize, (int *) gribbuffer, gribsize, &iword, hoper, &iret);

  if ( ISEC1_Sec2Or3Flag & 64 )
    *nmiss = ISEC4_NumValues - ISEC4_NumNonMissValues;
  else
    *nmiss = 0;

  return (status);
}


int grbReadRecord(int streamID, double *data, int *nmiss)
{
  static char func[] = "grbReadRecord";
  int status = 0;
  unsigned char *gribbuffer;
  int fileID;
  int recID, vrecID, tsID, gridID, varID;
  long recsize;
  off_t recpos;
  int gridsize;
  int vlistID;
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  int zip;
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  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);
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  stream_check_ptr(func, streamptr);
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  gribbuffer = (unsigned char *) streamptr->record->buffer;
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  vlistID = streamInqVlist(streamID);
  fileID  = streamInqFileID(streamID);
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  tsID    = streamptr->curTsID;
  vrecID  = streamptr->tsteps[tsID].curRecID;
  recID   = streamptr->tsteps[tsID].recIDs[vrecID];
  recpos  = streamptr->tsteps[tsID].records[recID].position;
  recsize = streamptr->tsteps[tsID].records[recID].size;
  varID   = streamptr->tsteps[tsID].records[recID].varID;
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  gridID   = vlistInqVarGrid(vlistID, varID);
  gridsize = gridInqSize(gridID);

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  streamptr->numvals += gridsize;
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  fileSetPos(fileID, recpos, SEEK_SET);

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  fileRead(fileID, gribbuffer, (size_t) recsize);
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  grbDecodeDataDP(gribbuffer, recsize, data, gridsize, streamptr->unreduced, nmiss, &zip);
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  streamptr->tsteps[tsID].records[recID].zip = zip;
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  return (status);
}

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static
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int gribGetZaxisType(int grb_ltype)
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{
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  int zaxistype = 0;
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  switch ( grb_ltype )
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    {
    case LTYPE_SURFACE:
      {
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	zaxistype = ZAXIS_SURFACE;
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	break;
      }
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    case LTYPE_MEANSEA:
      {
	zaxistype = ZAXIS_MEANSEA;
	break;
      }
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    case LTYPE_99:
    case LTYPE_ISOBARIC:
      {
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	zaxistype = ZAXIS_PRESSURE;
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	break;
      }
    case LTYPE_HEIGHT:
      {
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	zaxistype = ZAXIS_HEIGHT;
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	break;
      }
    case LTYPE_ALTITUDE:
      {
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	zaxistype = ZAXIS_ALTITUDE;
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	break;
      }
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    case LTYPE_SIGMA:
      {
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	zaxistype = ZAXIS_SIGMA;
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	break;
      }
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    case LTYPE_HYBRID:
    case LTYPE_HYBRID_LAYER:
      {
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	zaxistype = ZAXIS_HYBRID;
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	break;
      }
    case LTYPE_LANDDEPTH:
    case LTYPE_LANDDEPTH_LAYER:
      {
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	zaxistype = ZAXIS_DEPTH_BELOW_LAND;
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	break;
      }
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    case LTYPE_ISENTROPIC:
      {
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	zaxistype = ZAXIS_ISENTROPIC;
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	break;
      }
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    case LTYPE_SEADEPTH:
      {
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	zaxistype = ZAXIS_DEPTH_BELOW_SEA;
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	break;
      }
    default:
      {
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	zaxistype = ZAXIS_GENERIC;
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	break;
      }
    }

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  return (zaxistype);
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}

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static
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int gribGetZaxisHasBounds(int grb_ltype)
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{
  int lbounds = 0;

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  switch (grb_ltype)
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    {
    case LTYPE_HYBRID_LAYER:
    case LTYPE_LANDDEPTH_LAYER:
      {
	lbounds = 1;
	break;
      }
    }

  return (lbounds);
}

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static
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int gribTimeUnit(int *isec1)
{
  static char func[] = "gribTimeUnit";
  int timeunit = -1;
  static int lprint = TRUE;

  switch ( ISEC1_TimeUnit )
    {
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    case ISEC1_TABLE4_MINUTE:  timeunit = TUNIT_MINUTE;  break;
    case ISEC1_TABLE4_QUARTER: timeunit = TUNIT_QUARTER; break;
    case ISEC1_TABLE4_HOUR:    timeunit = TUNIT_HOUR;    break;
    case ISEC1_TABLE4_DAY:     timeunit = TUNIT_DAY;     break;
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    default:
      if ( lprint )
	{
	  Message(func, "Time unit %d unsupported", ISEC1_TimeUnit);
	  lprint = FALSE;
	}
    }

  return (timeunit);
}


int grbScanTimestep(int streamID)
{
  static char func[] = "grbScanTimestep";
  int *isec0, *isec1, *isec2, *isec3, *isec4;
  double fsec2[512], fsec3[2], *fsec4 = NULL;
  long recsize = 0;
  off_t recpos = 0;
  unsigned char *gribbuffer;
  long buffersize = 0;
  int iret = 0, ipunp = 0, iword = 0;
  int status;
  int fileID;
  int rcode = 0, level1 = 0, level2 = 0, vdate = 0, vtime = 0;
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  DateTime datetime, datetime0;
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  int tsID;
  int vrecID, recID;
  int warn_numavg = TRUE;
  size_t readsize;
  int taxisID = -1;
  TAXIS *taxis;
  int vlistID;
  int rindex, nrecs = 0;
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  long unzipsize;
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  compvar_t compVar, compVar0;
  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);

  stream_check_ptr(func, streamptr);
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  vlistID = streamInqVlist(streamID);

  if ( CDI_Debug )
    {
      Message(func, "streamID = %d", streamID);
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      Message(func, "cts = %d", streamptr->curTsID);
      Message(func, "rts = %d", streamptr->rtsteps);
      Message(func, "nts = %d", streamptr->ntsteps);
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    }

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  isec0 = streamptr->record->sec0;
  isec1 = streamptr->record->sec1;
  isec2 = streamptr->record->sec2;
  isec3 = streamptr->record->sec3;
  isec4 = streamptr->record->sec4;
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  tsID  = streamptr->rtsteps;
  taxis = &streamptr->tsteps[tsID].taxis;
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  if ( streamptr->tsteps[tsID].recordSize == 0 )
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    {
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      gribbuffer = (unsigned char *) streamptr->record->buffer;
      buffersize = streamptr->record->buffersize;
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      cdiCreateRecords(streamID, tsID);

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      nrecs = streamptr->tsteps[1].nrecs;
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      streamptr->tsteps[tsID].nrecs = nrecs;
      streamptr->tsteps[tsID].recIDs = (int *) malloc(nrecs*sizeof(int));
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      for ( recID = 0; recID < nrecs; recID++ )
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	streamptr->tsteps[tsID].recIDs[recID] = streamptr->tsteps[1].recIDs[recID];
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      fileID = streamInqFileID(streamID);

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      fileSetPos(fileID, streamptr->tsteps[tsID].position, SEEK_SET);
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      rindex = 0;
      while ( TRUE )
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	{
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	  if ( rindex > nrecs ) break;

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	  recsize = gribGetSize(fileID);
	  recpos  = fileGetPos(fileID);
	  if ( recsize == 0 )
	    {
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	      streamptr->ntsteps = streamptr->rtsteps + 1;
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	      break;
	    }
	  if ( recsize > buffersize )
	    {
	      buffersize = recsize;
	      gribbuffer = (unsigned char *) realloc(gribbuffer, buffersize);
	    }

	  readsize = recsize;
	  status = gribRead(fileID, gribbuffer, &readsize);
	  if ( status )
	    {
	      Error(func, "Inconsistent timestep %d (GRIB record %d/%d)!\n", tsID+1, rindex+1,
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		    streamptr->tsteps[tsID].recordSize);
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	      break;
	    }
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	  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);
		}
	    }

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	  gribExDP(isec0, isec1, isec2, fsec2, isec3, fsec3, isec4, fsec4,
		   ipunp, (int *) gribbuffer, recsize, &iword, "J", &iret);
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	  rcode    = ISEC1_Parameter;
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	  if ( ISEC1_LevelType == 100 ) ISEC1_Level1 *= 100;
	  if ( ISEC1_LevelType ==  99 ) ISEC1_LevelType = 100;
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	  level1   = ISEC1_Level1;
	  level2   = ISEC1_Level2;

	  gribDateTime(isec1, &vdate, &vtime);

	  if ( rindex == nrecs ) break;

	  if ( rindex == 0 )
	    {
	      taxisID = vlistInqTaxis(vlistID);
	      if ( taxisInqType(taxisID) == TAXIS_RELATIVE )
		{
		  taxis->type  = TAXIS_RELATIVE;
		  taxis->rdate = gribRefDate(isec1);
		  taxis->rtime = gribRefTime(isec1);
		  taxis->unit  = gribTimeUnit(isec1);
		}
	      else
		{
		  taxis->type  = TAXIS_ABSOLUTE;
		}
	      taxis->vdate = vdate;
	      taxis->vtime = vtime;
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	      datetime0.date = vdate;
	      datetime0.time = vtime;
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	    }

	  if ( ISEC1_AvgNum )
	    {
	      if (  taxis->numavg && warn_numavg &&
		   (taxis->numavg != ISEC1_AvgNum) )
		{
	      /*
		  Message(func, "Change numavg from %d to %d not allowed!",
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			  streamptr->tsteps[tsID].taxis.numavg, ISEC1_AvgNum);
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	      */
		  warn_numavg = FALSE;
		}
	      else
		{
		  taxis->numavg = ISEC1_AvgNum;
		}
	    }
	  
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	  datetime.date  = vdate;
	  datetime.time  = vtime;
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	  compVar.code   = rcode;
          compVar.table  = ISEC1_CodeTable;
          compVar.level1 = level1;
          compVar.level2 = level2;
          compVar.ltype  = ISEC1_LevelType;
	  for ( vrecID = 0; vrecID < nrecs; vrecID++ )
	    {
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	      recID   = streamptr->tsteps[1].recIDs[vrecID];
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	      compVar0.code   = streamptr->tsteps[tsID].records[recID].code;
	      compVar0.table  = streamptr->tsteps[tsID].records[recID].table;
	      compVar0.level1 = streamptr->tsteps[tsID].records[recID].ilevel;
	      compVar0.level2 = streamptr->tsteps[tsID].records[recID].ilevel2;
	      compVar0.ltype  = streamptr->tsteps[tsID].records[recID].ltype;
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	      if ( memcmp(&compVar0, &compVar, sizeof(compvar_t)) == 0 ) break;
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	    }
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	  if ( vrecID == nrecs )
	    {
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	      Warning(func, "Code %d level %d not available at timestep %d!",
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		      rcode, level1, tsID+1);
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	      if ( cdiInventoryMode == 1 )
		return (CDI_EUFSTRUCT);
	      else
		continue;
	    }

	  if ( cdiInventoryMode == 1 )
	    {
	      streamptr->tsteps[tsID].records[recID].used = TRUE;
	      streamptr->tsteps[tsID].recIDs[rindex] = recID;
	    }
	  else
	    {
	      if ( streamptr->tsteps[tsID].records[recID].used )
		{
		  if ( memcmp(&datetime, &datetime0, sizeof(DateTime)) != 0 ) break;
		  
		  if ( CDI_Debug )
		    Warning(func, "Code %d level %d already exist, skipped!", rcode, level1);

		  continue;
		}
	      else
		{
		  streamptr->tsteps[tsID].records[recID].used = TRUE;
		  streamptr->tsteps[tsID].recIDs[rindex] = recID;
		}    
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	    }

	  if ( CDI_Debug )
	    Message(func, "%4d %8d %4d %8d %8d %6d", rindex+1, (int)recpos, rcode, level1, vdate, vtime);

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	  compVar0.code   = streamptr->tsteps[tsID].records[recID].code;
	  compVar0.table  = streamptr->tsteps[tsID].records[recID].table;
	  compVar0.level1 = streamptr->tsteps[tsID].records[recID].ilevel;
	  compVar0.level2 = streamptr->tsteps[tsID].records[recID].ilevel2;
	  compVar0.ltype  = streamptr->tsteps[tsID].records[recID].ltype;
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	  if ( memcmp(&compVar0, &compVar, sizeof(compvar_t)) != 0 )
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	    {
	      Message(func, "tsID = %d recID = %d code = %3d new %3d  level = %3d new %3d",
		      tsID, recID,
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		      streamptr->tsteps[tsID].records[recID].code, rcode,
		      streamptr->tsteps[tsID].records[recID].ilevel, level1);
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	      Error(func, "Invalid, unsupported or inconsistent record structure");
	    }
	  
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	  streamptr->tsteps[tsID].records[recID].position = recpos;
	  streamptr->tsteps[tsID].records[recID].size = recsize;
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	  if ( CDI_Debug )
	    Message(func, "%4d %8d %4d %8d %8d %6d", rindex, (int)recpos, rcode, level1, vdate, vtime);
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	  rindex++;
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	}

      for ( vrecID = 0; vrecID < nrecs; vrecID++ )
	{
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	  recID   = streamptr->tsteps[tsID].recIDs[vrecID];
	  if ( ! streamptr->tsteps[tsID].records[recID].used ) break;
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	}

      if ( vrecID < nrecs )
	{
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	  Warning(func, "Code %d level %d not found at timestep %d!",
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		  streamptr->tsteps[tsID].records[recID].code,
		  streamptr->tsteps[tsID].records[recID].ilevel,
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		  tsID+1);
	  return (CDI_EUFSTRUCT);
	}

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

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

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      fileSetPos(fileID, streamptr->tsteps[tsID].position, SEEK_SET);
      streamptr->tsteps[tsID].position = recpos;
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      streamptr->record->buffer     = gribbuffer;
      streamptr->record->buffersize = buffersize;
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    }

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  if ( nrecs > 0 && nrecs < streamptr->tsteps[tsID].nrecs )
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    {
      Warning(func, "Incomplete timestep. Stop scanning at timestep %d.\n", tsID);
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      streamptr->ntsteps = tsID;
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    }

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  return (streamptr->ntsteps);
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}

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static
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void grbAddRecord(int streamID, int code, int *isec1, int *isec2, double *fsec2,
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		  int *isec4, long recsize, off_t position, int prec, int ztype)
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{
  static char func[] = "grbAddRecord";
  int gridtype;
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  int zaxistype;
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  int gridID = UNDEFID, varID;
  int levelID = 0;
  int tsID, recID;
  int level1, level2;
  int numavg;
  int lbounds = 0;
  RECORD *record;
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  grid_t grid;
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  int vlistID;
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  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);
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  vlistID = streamInqVlist(streamID);
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  tsID    = streamptr->curTsID;
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  recID   = recordNewEntry(streamID, tsID);
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  record  = &streamptr->tsteps[tsID].records[recID];
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  numavg  = ISEC1_AvgNum;

  level1  = ISEC1_Level1;
  level2  = ISEC1_Level2;

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  /* fprintf(stderr, "code %d %d %d %d\n", code, level1, level2, ISEC1_LevelType); */
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  (*record).size     = recsize;
  (*record).position = position;
  (*record).code     = code;
  (*record).table    = ISEC1_CodeTable;
  (*record).ilevel   = level1;
  (*record).ilevel2  = level2;
  (*record).ltype    = ISEC1_LevelType;

  gridtype = gribGetGridType(isec2);

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  if ( streamptr->unreduced && gridtype == GRID_GAUSSIAN_REDUCED )
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    {
      gridtype = GRID_GAUSSIAN;
      ISEC2_NumLon = 2*ISEC2_NumLat;
      ISEC4_NumValues = ISEC2_NumLon*ISEC2_NumLat;
    }

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  memset(&grid, 0, sizeof(grid_t));
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  switch (gridtype)
    {
    case GRID_LONLAT:
    case GRID_GAUSSIAN:
      {
	if ( ISEC4_NumValues != ISEC2_NumLon*ISEC2_NumLat )
	  Error(func, "wrong datasize! isec4len = %d isec2len = %d",
		ISEC4_NumValues, ISEC2_NumLon*ISEC2_NumLat);
	grid.size  = ISEC4_NumValues;
	grid.xsize = ISEC2_NumLon;
	grid.ysize = ISEC2_NumLat;
	grid.xinc  = 0;
	grid.yinc  = 0;
	grid.xdef  = 0;
	/* if ( ISEC2_FirstLon != 0 || ISEC2_LastLon != 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);

		/* correct xinc if necessary */
		if ( ISEC2_FirstLon == 0 && ISEC2_LastLon > 354000 )
		  {
		    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.xfirst = ISEC2_FirstLon * 0.001;
	    grid.xlast  = ISEC2_LastLon  * 0.001;
	    grid.xdef   = 2;	    
	  }
	grid.ydef  = 0;
	/* if ( ISEC2_FirstLat != 0 || ISEC2_LastLat != 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_GAUSSIAN_REDUCED:
      {
	grid.size   = ISEC4_NumValues;
        grid.rowlon = ISEC2_RowLonPtr;
	grid.ysize  = ISEC2_NumLat;
	grid.xinc  = 0;
	grid.yinc  = 0;
	grid.xdef  = 0;
	/* if ( ISEC2_FirstLon != 0 || ISEC2_LastLon != 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 ( ISEC2_FirstLat != 0 || ISEC2_LastLat != 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;
      }
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    case GRID_LCC:
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      {
	if ( ISEC4_NumValues != ISEC2_NumLon*ISEC2_NumLat )
	  Error(func, "wrong datasize! isec4len = %d isec2len = %d",
		ISEC4_NumValues, ISEC2_NumLon*ISEC2_NumLat);
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	grid.size  = ISEC4_NumValues;
	grid.xsize = ISEC2_NumLon;
	grid.ysize = ISEC2_NumLat;

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	grid.lcc_xinc      = ISEC2_Lambert_dx;
	grid.lcc_yinc      = ISEC2_Lambert_dy;
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	grid.lcc_originLon = ISEC2_FirstLon * 0.001;
	grid.lcc_originLat = ISEC2_FirstLat * 0.001;
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	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;
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	grid.xdef   = 0;	    
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	grid.ydef   = 0;

	break;
      }
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    case GRID_SPECTRAL:
      {
	grid.size  = ISEC4_NumValues;
	grid.trunc = ISEC2_PentaJ;
	break;
      }
    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;
      }
    case GRID_GENERIC:
      {
	grid.size  = ISEC4_NumValues;
	grid.xsize = 0;
	grid.ysize = 0;
	break;
      }
    default:
      {
	Error(func, "%s grid unsupported", gridNamePtr(gridtype));
	break;
      }
    }

  grid.isRotated = FALSE;
  if ( gribGetIsRotated(isec2) )
    {
      grid.isRotated = TRUE;
      grid.ypole     = - ISEC2_LatSP * 0.001;
      grid.xpole     =   ISEC2_LonSP * 0.001 - 180;
      grid.angle     = 0;
    }

  grid.xvals = NULL;
  grid.yvals = NULL;
  grid.type  = gridtype;

  gridID = varDefGrid(vlistID, grid, 0);

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  zaxistype = gribGetZaxisType(ISEC1_LevelType);
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  if ( zaxistype == ZAXIS_HYBRID )
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    {
      int vctsize = ISEC2_NumVCP;
      double *vctptr = &fsec2[10];

      varDefVCT(vctsize, vctptr);
    }

  lbounds = gribGetZaxisHasBounds(ISEC1_LevelType);

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  if ( prec > 32 ) prec = DATATYPE_PACK32;
  if ( prec <  0 ) prec = DATATYPE_PACK;
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  varAddRecord(recID, code, gridID, zaxistype, lbounds, level1, level2,
	       prec, &varID, &levelID, numavg, ISEC1_CodeTable, ISEC1_LevelType);
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  (*record).varID   = varID;
  (*record).levelID = levelID;

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  varDefZtype(varID, ztype);
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  if ( varInqInst(varID) == UNDEFID )
    {
      int center, subcenter, instID;
      center    = ISEC1_CenterID;
      subcenter = ISEC1_SubCenterID;
      instID    = institutInq(center, subcenter, NULL, NULL);
      if ( instID == UNDEFID )
	instID = institutDef(center, subcenter, NULL, NULL);
      varDefInst(varID, instID);
    }

  if ( varInqModel(varID) == UNDEFID )
    {
      int modelID;
      modelID = modelInq(varInqInst(varID), ISEC1_ModelID, NULL);
      if ( modelID == UNDEFID )
	modelID = modelDef(varInqInst(varID), ISEC1_ModelID, NULL);
      varDefModel(varID, modelID);
    }

  if ( varInqTable(varID) == UNDEFID )
    {
      int tableID;
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      tableID = tableInq(varInqModel(varID), ISEC1_CodeTable, NULL);
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      /*
      if ( tableID == UNDEFID && cdiPartabPath )
	{
	  char line[8192];
	  char command[4096];
	  FILE *pfp;
	  int nfiles;
	  int max_partab = 4096;
	  char *fnames[4096];
	  int cen, sub, ver, tab, nf, fi;
	  int icen, isub, iver, itab;

	  icen = ISEC1_CenterID;
          isub = ISEC1_SubCenterID;
          iver = ISEC1_ModelID;
          itab = ISEC1_CodeTable;
	  
	  sprintf(command, "cd %s 2> /dev/null; ls * 2> /dev/null", cdiPartabPath);

	  pfp = popen(command, "r");
	  if ( pfp == NULL )
	    SysError(func, "popen %s failed", command);
	  
	  nfiles = 0;
	  while ( _readline_(pfp, line, 8192) )
	    {
	      cen = -1; sub = -1; ver = -1; tab = -1;
	      nf = sscanf(line, "Cen%d_Sub%d_Ver%d_Tab%d", &cen, &sub, &ver, &tab);
	      printf("%d %d %d %d %d\n", nf, cen, sub, ver, tab);
	      if ( nfiles >= max_partab )
		{
		  Warning(func, "Too many parameter tables (limit: %d)", max_partab);
		  break;
		}
	      fnames[nfiles++] = strdupx(line);
	      printf("test: %s\n", line);
	    }

	  pclose(pfp);

	  if ( nfiles )
	    {
	      cen = -1; sub = -1; ver = -1; tab = -1;
	      for ( fi = 0; fi < nfiles; ++fi )
		{
		  nf = sscanf(fnames[fi], "Cen%d_Sub%d_Ver%d_Tab%d", &cen, &sub, &ver, &tab);
		  if ( nf == 4 && cen == icen && sub == isub && ver == iver && tab == itab ) goto END_LABEL;
		}
	      for ( fi = 0; fi < nfiles; ++fi )
		{
		  nf = sscanf(fnames[fi], "Cen%d_Sub%d_Tab%d", &cen, &sub, &tab);
		  if ( nf == 3 && cen == icen && sub == isub && tab == itab ) goto END_LABEL;
		}

	    END_LABEL:

	      if ( fi < nfiles )
		{
		  printf("found table %s\n", fnames[fi]);
		}
	    }
	}
      */
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      if ( tableID == UNDEFID )
	tableID = tableDef(varInqModel(varID), ISEC1_CodeTable, NULL);
      varDefTable(varID, tableID);
    }

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  streamptr->tsteps[tsID].nallrecs++;
  streamptr->nrecs++;
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  if ( CDI_Debug )
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    Message(func, "varID = %d  code = %d  zaxistype = %d  gridID = %d  levelID = %d",
	    varID, code, zaxistype, gridID, levelID);
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}

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void grbScanTimestep1(int streamID)
{
  static char func[] = "grbScanTimestep1";
  int *isec0, *isec1, *isec2, *isec3, *isec4;
  double fsec2[512], fsec3[2], *fsec4 = NULL;
  off_t recpos = 0;
  unsigned char *gribbuffer = NULL;
  long buffersize = 0;
  int iret = 0, ipunp = 0, iword = 0;
  int status;
  int fileID;
  int rcode = 0, level1 = 0, level2 = 0, vdate = 0, vtime = 0;
  DateTime datetime, datetime0;
  int tsID;
  int varID;
  size_t readsize;
  int nrecords, nrecs, recID;
  int prec;
  long recsize = 0;
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  int warn_time = TRUE;
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  int warn_numavg = TRUE;
  int taxisID = -1;
  int rdate = 0, rtime = 0, tunit = 0, fcast = 0;
  TAXIS *taxis;
  int vlistID;
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  int ztype;
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  long unzipsize;
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  compvar_t compVar, compVar0;
  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);
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  stream_check_ptr(func, streamptr);
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  streamptr->curTsID = 0;
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  isec0 = streamptr->record->sec0;
  isec1 = streamptr->record->sec1;
  isec2 = streamptr->record->sec2;
  isec3 = streamptr->record->sec3;
  isec4 = streamptr->record->sec4;
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  tsID  = tstepsNewEntry(streamID);
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  taxis = &streamptr->tsteps[tsID].taxis;
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  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 )
	{
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	  streamptr->ntsteps = 1;
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	  break;
	}
      if ( recsize > buffersize )
	{
	  buffersize = recsize;
	  gribbuffer = (unsigned char *) realloc(gribbuffer, buffersize);
	}

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

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

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      gribExDP(isec0, isec1, isec2, fsec2, isec3, fsec3, isec4, fsec4,
	       ipunp, (int *) gribbuffer, recsize, &iword, "J", &iret);

      rcode    = ISEC1_Parameter;
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      if ( ISEC1_LevelType == 100 ) ISEC1_Level1 *= 100;
      if ( ISEC1_LevelType ==  99 ) ISEC1_LevelType = 100;
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      level1   = ISEC1_Level1;
      level2   = ISEC1_Level2;

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      gribDateTime(isec1, &vdate, &vtime);

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      if ( ISEC4_NumBits > 0 && ISEC4_NumBits <= 32 )
	prec = ISEC4_NumBits;
      else
        prec = DATATYPE_PACK;
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      if ( nrecs == 0 )
	{
	  datetime0.date = vdate;
	  datetime0.time = vtime;
	  rdate = gribRefDate(isec1);
	  rtime = gribRefTime(isec1);
	  tunit = gribTimeUnit(isec1);
	  fcast = gribTimeIsFC(isec1);
	}
      else
	{
	  datetime.date  = vdate;
	  datetime.time  = vtime;
	  compVar.code   = rcode;
          compVar.table  = ISEC1_CodeTable;
          compVar.level1 = level1;
          compVar.level2 = level2;
          compVar.ltype  = ISEC1_LevelType;
	  for ( recID = 0; recID < nrecs; recID++ )
	    {
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	      compVar0.code   = streamptr->tsteps[0].records[recID].code;
	      compVar0.table  = streamptr->tsteps[0].records[recID].table;
	      compVar0.level1 = streamptr->tsteps[0].records[recID].ilevel;
	      compVar0.level2 = streamptr->tsteps[0].records[recID].ilevel2;
	      compVar0.ltype  = streamptr->tsteps[0].records[recID].ltype;
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	      if ( memcmp(&compVar0, &compVar, sizeof(compvar_t)) == 0 ) break;
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	    }
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	  if ( cdiInventoryMode == 1 )
	    {
	      if ( recID < nrecs ) break;
	      if ( warn_time )
		if ( memcmp(&datetime, &datetime0, sizeof(DateTime)) != 0 )
		  {
		    Warning(func, "Inconsistent verification time (code %d level %d)", rcode, level1);
		    warn_time = FALSE;
		  }
	    }
	  else
	    {
	      if ( memcmp(&datetime, &datetime0, sizeof(DateTime)) != 0 ) break;

	      if ( recID < nrecs )
		{
		  Warning(func, "Code %d level %d already exist, skipped!", rcode, level1);
		  continue;
		}
	    }
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	}

      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 )
	Message(func, "%4d %8d %4d  %8d %8d %6d", nrecs, (int)recpos, rcode, level1, vdate, vtime);

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      grbAddRecord(streamID, rcode, isec1, isec2, fsec2, isec4, recsize, recpos, prec, ztype);
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    }

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  streamptr->rtsteps = 1;
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  cdiGenVars(streamID);

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

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

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

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

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  streamptr->tsteps[0].recIDs = (int *) malloc(nrecords*sizeof(int));
  streamptr->tsteps[0].nrecs = nrecords;
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  for ( recID = 0; recID < nrecords; recID++ )
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    streamptr->tsteps[0].recIDs[recID] = recID;
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  streamptr->record->buffer     = gribbuffer;
  streamptr->record->buffersize = buffersize;
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  if ( streamptr->ntsteps == -1 )
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    {
      tsID = tstepsNewEntry(streamID);
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      if ( tsID != streamptr->rtsteps )
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	Error(func, "Internal error. tsID = %d", tsID);

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

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  if ( streamptr->ntsteps == 1 )
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    {
      if ( taxis->vdate == 0 && taxis->vtime == 0 )
	{
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	  streamptr->ntsteps = 0;
	  for ( varID = 0; varID < streamptr->nvars; varID++ )
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	    {
	      vlistDefVarTime(vlistID, varID, TIME_CONSTANT);
	    }
	}
    }
}

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int grbScanTimestep2(int streamID)
{
  static char func[] = "grbScanTimestep2";
  int *isec0, *isec1, *isec2, *isec3, *isec4;
  double fsec2[512], fsec3[2], *fsec4 = NULL;
  off_t recpos = 0;
  unsigned char *gribbuffer = NULL;
  long buffersize = 0;
  int iret = 0, ipunp = 0, iword = 0;
  int status;
  int fileID;
  int rcode = 0, level1 = 0, level2 = 0, vdate = 0, vtime = 0;
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  DateTime datetime, datetime0;
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  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;
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  long unzipsize;
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  compvar_t compVar, compVar0;
  stream_t *streamptr;
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  streamptr = stream_to_pointer(streamID);
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  stream_check_ptr(func, streamptr);
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  streamptr->curTsID = 1;

  isec0 = streamptr->record->sec0;
  isec1 = streamptr->record->sec1;
  isec2 = streamptr->record->sec2;
  isec3 = streamptr->record->sec3;
  isec4 = streamptr->record->sec4;
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  fileID  = streamInqFileID(streamID);
  vlistID = streamInqVlist(streamID);
  taxisID = vlistInqTaxis(vlistID);

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

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  taxis = &streamptr->tsteps[tsID].taxis;
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  fileSetPos(fileID, streamptr->tsteps[tsID].position, SEEK_SET);
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  cdiCreateRecords(streamID, tsID);

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

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

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

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

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      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);
	    }
	}

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      gribExDP(isec0, isec1, isec2, fsec2, isec3, fsec3, isec4, fsec4,
	       ipunp, (int *) gribbuffer, recsize, &iword, "J", &iret);

      rcode     = ISEC1_Parameter;
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      if ( ISEC1_LevelType == 100 ) ISEC1_Level1 *= 100;
      if ( ISEC1_LevelType ==  99 ) ISEC1_LevelType = 100;
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      level1    = ISEC1_Level1;
      level2    = ISEC1_Level2;

      gribDateTime(isec1, &vdate, &vtime);

      if ( rindex == 0 )
	{
	  if ( taxisInqType(taxisID) == TAXIS_RELATIVE )
	    {
	      taxis->type  = TAXIS_RELATIVE;
	      taxis->rdate = gribRefDate(isec1);
	      taxis->rtime = gribRefTime(isec1);
	      taxis->unit  = gribTimeUnit(isec1);
	    }
	  else
	    {
	      taxis->type  = TAXIS_ABSOLUTE;
	    }
	  taxis->vdate = vdate;
	  taxis->vtime = vtime;
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	  datetime0.date = vdate;
	  datetime0.time = vtime;
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	}

      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;
	    }
	}

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      datetime.date  = vdate;
      datetime.time  = vtime;
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      compVar.code   = rcode;
      compVar.table  = ISEC1_CodeTable;
      compVar.level1 = level1;
      compVar.level2 = level2;
      compVar.ltype  = ISEC1_LevelType;
      for ( recID = 0; recID < nrecords; recID++ )
	{
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	  compVar0.code   = streamptr->tsteps[tsID].records[recID].code;
	  compVar0.table  = streamptr->tsteps[tsID].records[recID].table;
	  compVar0.level1 = streamptr->tsteps[tsID].records[recID].ilevel;
	  compVar0.level2 = streamptr->tsteps[tsID].records[recID].ilevel2;
	  compVar0.ltype  = streamptr->tsteps[tsID].records[recID].ltype;
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	  if ( memcmp(&compVar0, &compVar, sizeof(compvar_t)) == 0 ) break;
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	}
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      if ( recID == nrecords )
	{
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	  Warning(func, "Code %d level %d not found at timestep %d!", rcode, level1, tsID+1);
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