Change.c 9.16 KB
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/*
  This file is part of CDO. CDO is a collection of Operators to
  manipulate and analyse Climate model Data.

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  Copyright (C) 2003-2010 Uwe Schulzweida, Uwe.Schulzweida@zmaw.de
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  See COPYING file for copying and redistribution conditions.

  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; version 2 of the License.

  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.
*/

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/*
   This module contains the following operators:

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      Change     chcode          Change code number
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      Change     chtabnum        Change GRIB1 parameter table number
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      Change     chname          Change variable name
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      Change     chlevel         Change level
      Change     chlevelc        Change level of one code
      Change     chlevelv        Change level of one variable
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      Change     chltype         Change GRIB level type 
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*/

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#include <cdi.h>
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#include "cdo.h"
#include "cdo_int.h"
#include "pstream.h"


#define  MAXARG     16384

void *Change(void *argument)
{
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  static const char *func = "Change";
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  int CHCODE, CHTABNUM, CHNAME, CHLEVEL, CHLEVELC, CHLEVELV, CHLTYPE;  
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  int operatorID;
  int streamID1, streamID2 = CDI_UNDEFID;
  int nrecs, nvars;
  int tsID1, recID, varID = 0, levelID;
  int vlistID1, vlistID2;
  int taxisID1, taxisID2;
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  int chcodes[MAXARG], chtabnums[MAXARG], nch = 0;
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  char *chnames[MAXARG];
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  char varname[128];
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  char *chname = NULL;
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  int chcode = 0;
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  int code, tabnum, i;
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  int nmiss;
  int gridsize;
  int nfound;
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  int nzaxis, zaxisID1, zaxisID2, k, nlevs, index; 
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  double chlevels[MAXARG];
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  int  chltypes[MAXARG];              
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  double *levels = NULL;
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  double *newlevels = NULL;
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  double *array = NULL;

  cdoInitialize(argument);

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  CHCODE   = cdoOperatorAdd("chcode",   0, 0, "pairs of old and new code numbers");
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  CHTABNUM = cdoOperatorAdd("chtabnum", 0, 0, "pairs of old and new GRIB1 table numbers");
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  CHNAME   = cdoOperatorAdd("chname",   0, 0, "pairs of old and new variable names");
  CHLEVEL  = cdoOperatorAdd("chlevel",  0, 0, "pairs of old and new levels");
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  CHLEVELC = cdoOperatorAdd("chlevelc", 0, 0, "code number, old and new level");
  CHLEVELV = cdoOperatorAdd("chlevelv", 0, 0, "variable name, old and new level");
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  CHLTYPE  = cdoOperatorAdd("chltype",  0, 0, "pairs of old and new type");          
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  operatorID = cdoOperatorID();

  operatorInputArg(cdoOperatorEnter(operatorID));

  nch = operatorArgc();

  if ( operatorID == CHCODE )
    {
      if ( nch%2 ) cdoAbort("Odd number of input arguments!");
      for ( i = 0; i < nch; i++ )
	chcodes[i] = atoi(operatorArgv()[i]);
    }
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  else if ( operatorID == CHTABNUM )
    {
      if ( nch%2 ) cdoAbort("Odd number of input arguments!");
      for ( i = 0; i < nch; i++ )
	chtabnums[i] = atoi(operatorArgv()[i]);
    }
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  else if ( operatorID == CHNAME )
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    {
      if ( nch%2 ) cdoAbort("Odd number of input arguments!");
      for ( i = 0; i < nch; i++ )
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	chnames[i] = operatorArgv()[i];
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    }
  else if ( operatorID == CHLEVEL )
    {
      if ( nch%2 ) cdoAbort("Odd number of input arguments!");
      for ( i = 0; i < nch; i++ )
	chlevels[i] = atof(operatorArgv()[i]);
    }
  else if ( operatorID == CHLEVELC )
    {
      operatorCheckArgc(3);
      
      chcode = atoi(operatorArgv()[0]);
      chlevels[0] = atof(operatorArgv()[1]);
      chlevels[1] = atof(operatorArgv()[2]);
    }
  else if ( operatorID == CHLEVELV )
    {
      operatorCheckArgc(3);
      
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      chname = operatorArgv()[0];
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      chlevels[0] = atof(operatorArgv()[1]);
      chlevels[1] = atof(operatorArgv()[2]);
    }
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  else if ( operatorID == CHLTYPE )                  
    {
      if ( nch%2 ) cdoAbort("Odd number of input arguments!");
      for ( i = 0; i < nch; i++ )
	chltypes[i] = atoi(operatorArgv()[i]);
    }
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  streamID1 = streamOpenRead(cdoStreamName(0));
  if ( streamID1 < 0 ) cdiError(streamID1, "Open failed on %s", cdoStreamName(0));

  vlistID1 = streamInqVlist(streamID1);
  vlistID2 = vlistDuplicate(vlistID1);

  taxisID1 = vlistInqTaxis(vlistID1);
  taxisID2 = taxisDuplicate(taxisID1);
  vlistDefTaxis(vlistID2, taxisID2);

  if ( operatorID == CHCODE )
    {
      nvars = vlistNvars(vlistID2);
      for ( varID = 0; varID < nvars; varID++ )
	{
	  code = vlistInqVarCode(vlistID2, varID);
	  for ( i = 0; i < nch; i += 2 )
	    if ( code == chcodes[i] )
	      vlistDefVarCode(vlistID2, varID, chcodes[i+1]);
	}
    }
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  else if ( operatorID == CHTABNUM )
    {
      int tableID;
      nvars = vlistNvars(vlistID2);
      for ( varID = 0; varID < nvars; varID++ )
	{
	  tabnum = tableInqNum(vlistInqVarTable(vlistID2, varID));
	  for ( i = 0; i < nch; i += 2 )
	    if ( tabnum == chtabnums[i] )
	      {
		tableID = tableDef(-1, chtabnums[i+1], NULL);
		vlistDefVarTable(vlistID2, varID, tableID);
	      }
	}
    }
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  else if ( operatorID == CHNAME )
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    {
      nvars = vlistNvars(vlistID2);
      for ( varID = 0; varID < nvars; varID++ )
	{
	  vlistInqVarName(vlistID2, varID, varname);
	  for ( i = 0; i < nch; i += 2 )
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	    if ( strcmp(varname, chnames[i]) == 0 )
	      vlistDefVarName(vlistID2, varID, chnames[i+1]);
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	}
    }
  else if ( operatorID == CHLEVEL )
    {
      nzaxis = vlistNzaxis(vlistID2);
      for ( index = 0; index < nzaxis; index++ )
	{
	  zaxisID1 = vlistZaxis(vlistID2, index);
	  nlevs = zaxisInqSize(zaxisID1);
	  levels = (double *) malloc(nlevs*sizeof(double));
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	  newlevels = (double *) malloc(nlevs*sizeof(double));
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	  zaxisInqLevels(zaxisID1, levels);
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	  for ( k = 0; k < nlevs; k++ ) newlevels[k] = levels[k];

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	  nfound = 0;
	  for ( i = 0; i < nch; i += 2 )
	    for ( k = 0; k < nlevs; k++ )
	      if ( fabs(levels[k] - chlevels[i]) < 0.0001 ) nfound++;

	  if ( nfound )
	    {
	      zaxisID2 = zaxisDuplicate(zaxisID1);
	      for ( i = 0; i < nch; i += 2 )
		for ( k = 0; k < nlevs; k++ )
		  if ( fabs(levels[k] - chlevels[i]) < 0.001 )
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		    newlevels[k] = chlevels[i+1];
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	      zaxisDefLevels(zaxisID2, newlevels);
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	      vlistChangeZaxis(vlistID2, zaxisID1, zaxisID2);
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	    }

	  free(levels);
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	  free(newlevels);
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	}
    }
  else if ( operatorID == CHLEVELC || operatorID == CHLEVELV )
    {
      nvars = vlistNvars(vlistID2);
      if ( operatorID == CHLEVELC )
	{
	  for ( varID = 0; varID < nvars; varID++ )
	    {
	      code = vlistInqVarCode(vlistID2, varID);
	      if ( code == chcode ) break;
	    }
	  if ( varID == nvars ) cdoAbort("Code %d not found!", chcode);
	}
      else
	{
	  for ( varID = 0; varID < nvars; varID++ )
	    {
	      vlistInqVarName(vlistID2, varID, varname);
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	      if ( strcmp(varname, chname) == 0 ) break;
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	    }
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	  if ( varID == nvars ) cdoAbort("Variable name %s not found!", chname);
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	}

      zaxisID1 = vlistInqVarZaxis(vlistID2, varID);
      nlevs = zaxisInqSize(zaxisID1);
      levels = (double *) malloc(nlevs*sizeof(double));
      zaxisInqLevels(zaxisID1, levels);
      nfound = 0;
      for ( k = 0; k < nlevs; k++ )
	if ( fabs(levels[k] - chlevels[0]) < 0.0001 ) nfound++;

      if ( nfound )
	{
	  zaxisID2 = zaxisDuplicate(zaxisID1);
	  for ( k = 0; k < nlevs; k++ )
	    if ( fabs(levels[k] - chlevels[0]) < 0.001 )
	      levels[k] = chlevels[1];

	  zaxisDefLevels(zaxisID2, levels);
	  vlistChangeVarZaxis(vlistID2, varID, zaxisID2);
	}
      else
	cdoAbort("Level %g not found!", chlevels[0]);

      free(levels);
    }
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  else if ( operatorID == CHLTYPE )                
    {
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      int zaxistype, zaxistype1, zaxistype2, ltype, ltype1, ltype2, sameltype;
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      nzaxis = vlistNzaxis(vlistID2);
      for ( index = 0; index < nzaxis; index++ )
	{
	  zaxisID1 = vlistZaxis(vlistID2, index);
	  zaxisID2 = zaxisDuplicate(zaxisID1);

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	  zaxistype = zaxisInqType(zaxisID1);
	  ltype = zaxisInqLtype(zaxisID1);
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	  for ( i = 0; i < nch; i += 2 )
	    {
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	      sameltype = FALSE;
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	      ltype1 = chltypes[i];
	      ltype2 = chltypes[i+1];

	      zaxistype1 = ltype2ztype(ltype1);
	      zaxistype2 = ltype2ztype(ltype2);

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	      if ( zaxistype1 == zaxistype ) sameltype = TRUE;

	      if ( !(zaxistype1 == ZAXIS_GENERIC && ltype1 == ltype) ) sameltype = FALSE;

	      if ( sameltype)
		{
		  zaxisChangeType(zaxisID2, zaxistype2);
		  if ( zaxistype == ZAXIS_GENERIC ) zaxisDefLtype(zaxisID2, ltype2);
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		  vlistChangeZaxis(vlistID2, zaxisID1, zaxisID2);
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		}
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	    }
	}
    }
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  streamID2 = streamOpenWrite(cdoStreamName(1), cdoFiletype());
  if ( streamID2 < 0 ) cdiError(streamID2, "Open failed on %s", cdoStreamName(1));

  streamDefVlist(streamID2, vlistID2);

  gridsize = vlistGridsizeMax(vlistID2);
  array = (double *) malloc(gridsize*sizeof(double));

  tsID1 = 0;
  while ( (nrecs = streamInqTimestep(streamID1, tsID1)) )
    {
      taxisCopyTimestep(taxisID2, taxisID1);

      streamDefTimestep(streamID2, tsID1);
	       
      for ( recID = 0; recID < nrecs; recID++ )
	{
	  streamInqRecord(streamID1, &varID, &levelID);
	  streamDefRecord(streamID2,  varID,  levelID);
	  
	  streamReadRecord(streamID1, array, &nmiss);
	  streamWriteRecord(streamID2, array, nmiss);
	}
      tsID1++;
    }

  streamClose(streamID1);
  streamClose(streamID2);

  if ( array ) free(array);

  cdoFinish();

  return (0);
}