コード例 #1
0
ファイル: tst_h_rdc0.c プロジェクト: BJangeofan/netcdf-c
int
main()
{
   printf("\n*** Checking HDF5 file c0.nc.\n");
   printf("*** Checking HDF5 objcts...");

   {
      hid_t fileid, grpid;
      hsize_t num_obj, i;
      char obj_name[MAX_NAME];

      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR; 
      if ((grpid = H5Gopen(fileid, "/")) < 0) ERR;

      /* Find the variables. Read their metadata and attributes. */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the class (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if (H5Gget_objtype_by_idx(grpid, i) < 0) ERR;
	 if (H5Gget_objname_by_idx(grpid, i, obj_name, MAX_NAME) < 0) ERR;
      }

      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }
   SUMMARIZE_ERR;

   FINAL_RESULTS;
}
コード例 #2
0
ファイル: hdf5dataset.cpp プロジェクト: ksshannon/gdal
CPLErr HDF5Dataset::ReadGlobalAttributes(int bSUBDATASET)
{
    HDF5GroupObjects *poRootGroup =
        static_cast<HDF5GroupObjects *>(CPLCalloc(sizeof(HDF5GroupObjects), 1));

    poH5RootGroup = poRootGroup;
    poRootGroup->pszName = CPLStrdup("/");
    poRootGroup->nType = H5G_GROUP;
    poRootGroup->poHparent = nullptr;
    poRootGroup->pszPath = nullptr;
    poRootGroup->pszUnderscorePath = nullptr;

    if( hHDF5 < 0 )
    {
        CPLError(CE_Failure, CPLE_AppDefined, "hHDF5 < 0!");
        return CE_None;
    }

    H5G_stat_t oStatbuf = {{0, 0}, {0, 0}, 0, H5G_UNKNOWN, 0, 0, {0, 0, 0, 0}};

    if( H5Gget_objinfo(hHDF5, "/", FALSE, &oStatbuf) < 0 )
        return CE_Failure;
    poRootGroup->objno[0] = oStatbuf.objno[0];
    poRootGroup->objno[1] = oStatbuf.objno[1];

    if( hGroupID > 0 )
        H5Gclose(hGroupID);
    hGroupID = H5Gopen(hHDF5, "/");
    if( hGroupID < 0 )
    {
        CPLError(CE_Failure, CPLE_AppDefined, "hGroupId <0!");
        return CE_None;
    }

    poRootGroup->nbAttrs = H5Aget_num_attrs(hGroupID);

    H5Gget_num_objs(hGroupID, &(poRootGroup->nbObjs));

    if( poRootGroup->nbObjs > 0 )
    {
        poRootGroup->poHchild = static_cast<HDF5GroupObjects *>(
            CPLCalloc(static_cast<size_t>(poRootGroup->nbObjs),
                      sizeof(HDF5GroupObjects)));
        H5Giterate(hGroupID, "/", nullptr, HDF5CreateGroupObjs, poRootGroup);
    }
    else
    {
        poRootGroup->poHchild = nullptr;
    }

    HDF5ListGroupObjects(poRootGroup, bSUBDATASET);
    return CE_None;
}
コード例 #3
0
ファイル: HBase.cpp プロジェクト: kkaushalp/aphid
int HBase::numDatas()
{
	int res = 0;
	hsize_t nobj;
	H5Gget_num_objs(fObjectId, &nobj);
	hsize_t i;
	for(i = 0; i < nobj; i++) {
		if(isChildData(i))
            res++;
	}
	return res;
}
コード例 #4
0
ファイル: hdf5dataset.cpp プロジェクト: rashadkm/lib_gdal
CPLErr HDF5Dataset::ReadGlobalAttributes(int bSUBDATASET)
{

    HDF5GroupObjects *poRootGroup;

    poRootGroup = (HDF5GroupObjects*) CPLCalloc(sizeof(HDF5GroupObjects), 1);

    poH5RootGroup=poRootGroup;
    poRootGroup->pszName   = CPLStrdup( "/" );
    poRootGroup->nType     = H5G_GROUP;
    poRootGroup->poHparent = NULL;
    poRootGroup->pszPath = NULL;
    poRootGroup->pszUnderscorePath = NULL;

    if( hHDF5 < 0 )  {
        printf( "hHDF5 <0!!\n" );
        return CE_None;
    }

    H5G_stat_t  oStatbuf;
    if( H5Gget_objinfo( hHDF5, "/", FALSE, &oStatbuf ) < 0  )
        return CE_Failure;
    poRootGroup->objno[0] = oStatbuf.objno[0];
    poRootGroup->objno[1] = oStatbuf.objno[1];

    if( hGroupID > 0 )
        H5Gclose( hGroupID );
    hGroupID = H5Gopen( hHDF5, "/" );
    if( hGroupID < 0 ){
        printf( "hGroupID <0!!\n" );
        return CE_None;
    }

    poRootGroup->nbAttrs = H5Aget_num_attrs( hGroupID );

    H5Gget_num_objs( hGroupID, &( poRootGroup->nbObjs ) );

    if( poRootGroup->nbObjs > 0 ) {
        poRootGroup->poHchild = ( HDF5GroupObjects * )
            CPLCalloc( poRootGroup->nbObjs,
            sizeof( HDF5GroupObjects ) );
        H5Giterate( hGroupID, "/", NULL,
               HDF5CreateGroupObjs, (void *)poRootGroup );
    }
    else poRootGroup->poHchild = NULL;

    HDF5ListGroupObjects( poRootGroup, bSUBDATASET );
    return CE_None;
}
コード例 #5
0
ファイル: HBase.cpp プロジェクト: kkaushalp/aphid
char HBase::hasNamedChild(const char * childName)
{
	hsize_t nobj = 0;
	H5Gget_num_objs(fObjectId, &nobj);
	//std::cout<<"\n"<<fObjectPath<<" has "<<nobj<<"objs\n";
	hsize_t i;
	for(i = 0; i < nobj; i++) {
		//std::cout<<getChildName(i)<<"\n";
		if(getChildName(i) == childName) {
			//std::cout<<"found "<<childName;
			return 1;
		}
	}
	return 0;
}
コード例 #6
0
ファイル: mdal_hdf5.cpp プロジェクト: DelazJ/QGIS
std::vector<std::string> HdfGroup::objects( H5G_obj_t type ) const
{
  std::vector<std::string> lst;

  hsize_t nobj;
  H5Gget_num_objs( d->id, &nobj );
  for ( hsize_t i = 0; i < nobj; ++i )
  {
    if ( type == H5G_UNKNOWN || H5Gget_objtype_by_idx( d->id, i ) == type )
    {
      char name[HDF_MAX_NAME];
      H5Gget_objname_by_idx( d->id, i, name, ( size_t )HDF_MAX_NAME );
      lst.push_back( std::string( name ) );
    }
  }
  return lst;
}
コード例 #7
0
int AMRreader::
getInfo( const char* filename )
{
  debug2 << "opening AMR file " << filename << "\n";

  filename_ = filename;

  hid_t file_id = H5Fopen( filename, H5F_ACC_RDONLY, H5P_DEFAULT );
  if( file_id<0 ) {
    debug1 << "Failed to open AMR file: " << filename << ".\n";
    return -1;
  }

  hsize_t nobjs;
  herr_t  err = H5Gget_num_objs( file_id, &nobjs );
  debug2 << "nobjs in " << filename << " is " << nobjs << "\n";
  for( hsize_t i=0; i<nobjs; i++ ) {
    int type = H5Gget_objtype_by_idx( file_id, i );
    if( type == H5G_GROUP ) {
      char name[1000];
      ssize_t l= H5Gget_objname_by_idx( file_id, i, name, 1000 );

      hid_t gid = H5Gopen1( file_id, name );

      if( strcmp( name, amr_grpname )==0 ) {
    if( getAMRinfo( gid )!=0 ) {
      debug1 << "Failed to retrieve AMR info in " << filename << "\n";
      H5Gclose(gid);
      return -2;
    }}
      else if( strcmp( name, intf_grp_name )==0 ) {
    if( getIntfInfo( gid ) != 0 ) {
      debug1 << "Failed to retrieve Interface info in " << filename << "\n";
      return -3;
    }}
      else {
    debug1 << "Find a unrecongnized group " << name << " in " << filename << "\n";
      }

      H5Gclose(gid);
    }
  }

  H5Fclose( file_id );
  return 0;
}
コード例 #8
0
ファイル: HBase.cpp プロジェクト: kkaushalp/aphid
char HBase::hasNamedData(const char * dataName)
{
	hsize_t nobj;
	H5Gget_num_objs(fObjectId, &nobj);
	//std::cout<<"\n"<<fObjectPath<<" has "<<nobj<<"objs\n";
	hsize_t i;
	for(i = 0; i < nobj; i++) {
		//std::cout<<getChildName(i)<<"\n";
		if(isChildData(i)) {
            if(getChildName(i) == dataName) {
                //std::cout<<"found "<<dataName<<"\n";;
                return 1;
            }
        }
	}
	return 0;
}
コード例 #9
0
ファイル: FWSingleOMP.cpp プロジェクト: digideskio/qmcpack
  bool 
    FWSingleOMP::put(xmlNodePtr q){

      fname<<xmlrootName<<".storeConfig.h5";
      c_file = H5Fopen(fname.str().c_str(),H5F_ACC_RDONLY,H5P_DEFAULT);
      hsize_t numGrps = 0;
      H5Gget_num_objs(c_file, &numGrps);
      numSteps = static_cast<int> (numGrps)-3;
      app_log()<<"  Total number of steps in input file "<<numSteps<<endl;
      if (weightFreq<1) weightFreq=1;
      int numberDataPoints = weightLength/weightFreq;
      //     pointsToCalculate.resize(numberDataPoints);
      //     for(int i=0;i<numberDataPoints;i++) pointsToCalculate[i]=i*weightFreq;
      app_log()<<"  "<<numberDataPoints<<" sets of observables will be calculated each "<<weightFreq<<" steps"<<endl;
      app_log()<<"  Config Generations skipped for thermalization: "<<startStep<<endl;//<<" steps. At: ";
      //     for(int i=0;i<numberDataPoints;i++) app_log()<<pointsToCalculate[i]<<" ";
      app_log()<<endl;
      if (H5Fclose(c_file)>-1) c_file=-1;

      return true;
    }
コード例 #10
0
//------------------------------------------------------------------------------
// Description:
// Finds the block index (blockIndx) within the HDF5 file associated with
// the given file index.
static bool FindBlockIndex(hid_t fileIndx, const int blockIdx, hid_t &rootIndx)
{
    // retrieve the contents of the root directory to look for a group
    // corresponding to the target block, if available, open that group
    hsize_t numbObjs;
    rootIndx = H5Gopen(fileIndx, "/");
    if (rootIndx < 0)
    {
        vtkGenericWarningMacro("Failed to open root node of particles file");
        return false;
    }

    bool found = false;
    H5Gget_num_objs(rootIndx, &numbObjs);
    for (int objIndex = 0; objIndex < static_cast < int >(numbObjs); objIndex++)
    {
        if (H5Gget_objtype_by_idx(rootIndx, objIndex) == H5G_GROUP)
        {
            int blckIndx;
            char blckName[65];
            H5Gget_objname_by_idx(rootIndx, objIndex, blckName, 64);

            // Is this the target block?
            if ((sscanf(blckName, "Grid%d", &blckIndx) == 1) &&
                (blckIndx == blockIdx))
            {
                // located the target block
                rootIndx = H5Gopen(rootIndx, blckName);
                if (rootIndx < 0)
                {
                    vtkGenericWarningMacro("Could not locate target block!\n");
                }
                found = true;
                break;
            }
        } // END if group
    } // END for all objects
    return (found);
}
コード例 #11
0
/*
 *  utility function which checks whether a particular dataset
 *  is present in the HDF5 file
 */
int checkfordataset(hid_t file_id, char *datasetname)
{
  /* default is zero */
  int ispresent=0;

  /* get number of datasets in file */
  hsize_t ndatasets[1];
  H5Gget_num_objs(file_id, ndatasets);

  /* loop over all datasets looking for dataset matching datasetname
     set function value to true (1) if it is present  */
  int i;
  char name[256];
  for (i=0;i<(int)ndatasets[0];i++) {
      H5Gget_objname_by_idx(file_id, i, name, 256);
      /* printf(" dataset %s in file \n",name); */
      if (strcmp(name,datasetname)==0) {
         /*printf(" %s in file \n",datasetname);*/
         ispresent = 1;
      }
  }
  return ispresent;
}
コード例 #12
0
std::vector<std::string> hdf5file::subelements(const std::string& path, int desired_type)
{
	hid_t group_id = H5Gopen(_file_id, path.c_str(), H5P_DEFAULT);

	const size_t MAX_NAME = 256;
	char element_name[MAX_NAME];

	hsize_t object_count;
	H5Gget_num_objs(group_id, &object_count);

	std::vector<std::string> result;

	for(std::size_t i = 0; i < object_count; ++i)
	{

		int object_type = H5Gget_objtype_by_idx(group_id, i);
		H5Gget_objname_by_idx(group_id, i, element_name, MAX_NAME);

		if(object_type == desired_type)
			result.push_back(std::string(element_name));
	}

	return result;
}
コード例 #13
0
ファイル: tst_h_files4.c プロジェクト: dengchangtao/libmesh
int
main()
{
   printf("\n*** Checking HDF5 file functions.\n");
   printf("*** Creating HDF5 file in the canonical netCDF-4 way...");
   {
      hid_t fapl_id, fcpl_id, fileid, grpid, fileid2;
      hsize_t num_obj;

      /* Create file access and create property lists. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      
      /* Set latest_format in access propertly list. This ensures that
       * the latest, greatest, HDF5 versions are used in the file. */ 
/*      if (H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST, 
	H5F_LIBVER_LATEST) < 0) ERR;*/

      /* Set H5P_CRT_ORDER_TRACKED in the creation property list. This
       * turns on HDF5 creation ordering in the file. */
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;

      /* Set close degree. */
      if (H5Pset_fclose_degree(fapl_id, H5F_CLOSE_STRONG)) ERR;

      /* Create the file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;

      /* Open the root group. */
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;

      /* Close up. */
      if (H5Pclose(fapl_id) < 0 ||
	  H5Pclose(fcpl_id) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0)
	 ERR;

      /* Reopen the file and check it. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if (H5Pset_fclose_degree(fapl_id, H5F_CLOSE_STRONG)) ERR;

      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, fapl_id)) < 0) ERR;
      if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
      if (num_obj) ERR;

      /* Open another copy of the same file. Must use the same file
       * access degree or HDF5 will not open the file. */
      if ((fileid2 = H5Fopen(FILE_NAME, H5F_ACC_RDWR, fapl_id)) < 0) ERR;

      if (H5Fclose(fileid) < 0) ERR;
      if (H5Fclose(fileid2) < 0) ERR;
      if (H5Pclose(fapl_id) < 0) ERR;
   }
   SUMMARIZE_ERR;
   printf("*** Opening a HDF5 file with H5Literate...");
   {
      hid_t fapl_id, fileid, grpid;
      hsize_t idx = 0;
      char obj_name[STR_LEN + 1];
      hsize_t num_obj;
      int i;

      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if (H5Pset_fclose_degree(fapl_id, H5F_CLOSE_STRONG)) ERR;
      if (H5Pset_cache(fapl_id, 0, CHUNK_CACHE_NELEMS, CHUNK_CACHE_SIZE, 
		       CHUNK_CACHE_PREEMPTION) < 0) ERR;
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, fapl_id)) < 0) ERR;
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;

      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i = 0; i < num_obj; i++)
      {
	 if (H5Literate(grpid, H5_INDEX_CRT_ORDER, H5_ITER_INC, &idx, op_func, 
			(void *)obj_name) != 1) ERR;
	 printf("encountered object %s\n", obj_name);
      }

      if (H5Gclose(grpid) < 0) ERR;
      if (H5Fclose(fileid) < 0) ERR;
      if (H5Pclose(fapl_id) < 0) ERR;
   }
   SUMMARIZE_ERR;
   printf("*** Opening a HDF5 file in the canonical netCDF-4 way...");
   {
      hid_t fapl_id, fileid, grpid;
      H5_index_t idx_field = H5_INDEX_CRT_ORDER;
      H5O_info_t obj_info;
      hsize_t num_obj;
      ssize_t size;
      char obj_name[STR_LEN + 1];
      int i;

      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if (H5Pset_fclose_degree(fapl_id, H5F_CLOSE_STRONG)) ERR;
      if (H5Pset_cache(fapl_id, 0, CHUNK_CACHE_NELEMS, CHUNK_CACHE_SIZE, 
		       CHUNK_CACHE_PREEMPTION) < 0) ERR;
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, fapl_id)) < 0) ERR;
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;

      /* How many objects in this group? */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i = 0; i < num_obj; i++)
      {
	 if (H5Oget_info_by_idx(grpid, ".", H5_INDEX_CRT_ORDER, H5_ITER_INC, 
				i, &obj_info, H5P_DEFAULT)) ERR;
	 if ((size = H5Lget_name_by_idx(grpid, ".", idx_field, H5_ITER_INC, i,
					NULL, 0, H5P_DEFAULT)) < 0) ERR;
	 if (H5Lget_name_by_idx(grpid, ".", idx_field, H5_ITER_INC, i,
				obj_name, size+1, H5P_DEFAULT) < 0) ERR;
      }

      if (H5Gclose(grpid) < 0) ERR;
      if (H5Fclose(fileid) < 0) ERR;
      if (H5Pclose(fapl_id) < 0) ERR;
   }
   SUMMARIZE_ERR;
   FINAL_RESULTS;
}
コード例 #14
0
ファイル: HBase.cpp プロジェクト: kkaushalp/aphid
int HBase::numChildren()
{
	hsize_t nobj = 0;
	H5Gget_num_objs(fObjectId, &nobj);
	return (int)nobj;
}
コード例 #15
0
int
main()
{
   printf("\n*** Checking HDF5 dimension scales.\n");
#define GRP_NAME "simple_scales"
#define DIMSCALE_NAME "dimscale"
#define NAME_ATTRIBUTE "Billy-Bob"
#define VAR1_NAME "var1"
#define VAR2_NAME "var2"
#define VAR3_NAME "var3"
#define DIM1_LEN 3
#define DIM2_LEN 2
#define FIFTIES_SONG "Mamma said they'll be days like this. They'll be days like this, my mamma said."

   printf("*** Creating simple dimension scales file...");
   {
      hid_t fileid, grpid, dimscaleid;
      hid_t dimscale_spaceid, var1_spaceid, var3_spaceid;
      hid_t var1_datasetid, var2_datasetid, var3_datasetid;
      hsize_t dims[2] = {DIM1_LEN, DIM2_LEN};
      hsize_t dimscale_dims[1] = {DIM1_LEN};

      /* Open file and create group. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, 
			      H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gcreate(fileid, GRP_NAME, 0)) < 0) ERR;
      
      /* Create our dimension scale. Use the built-in NAME attribute
       * on the dimscale. */
      if ((dimscale_spaceid = H5Screate_simple(1, dimscale_dims, 
					       dimscale_dims)) < 0) ERR;
      if ((dimscaleid = H5Dcreate(grpid, DIMSCALE_NAME, H5T_NATIVE_INT, 
				  dimscale_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(dimscaleid, NAME_ATTRIBUTE) < 0) ERR;

      /* Create a 1D variable which uses the dimscale. Attach a label
       * to this scale. */
      if ((var1_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      if ((var1_datasetid = H5Dcreate(grpid, VAR1_NAME, H5T_NATIVE_INT, 
				      var1_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSattach_scale(var1_datasetid, dimscaleid, 0) < 0) ERR;
      if (H5DSset_label(var1_datasetid, 0, FIFTIES_SONG) < 0) ERR;

      /* Create a 1D variabls that doesn't use the dimension scale. */
      if ((var2_datasetid = H5Dcreate(grpid, VAR2_NAME, H5T_NATIVE_INT, 
				      var1_spaceid, H5P_DEFAULT)) < 0) ERR;

      /* Create a 2D dataset which uses the scale for one of its
       * dimensions. */
      if ((var3_spaceid = H5Screate_simple(2, dims, dims)) < 0) ERR;
      if ((var3_datasetid = H5Dcreate(grpid, VAR3_NAME, H5T_NATIVE_INT, 
				      var3_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSattach_scale(var3_datasetid, dimscaleid, 0) < 0) ERR;

      /* Close up the shop. */
      if (H5Dclose(dimscaleid) < 0 ||
	  H5Dclose(var1_datasetid) < 0 ||
	  H5Dclose(var2_datasetid) < 0 ||
	  H5Dclose(var3_datasetid) < 0 ||
	  H5Sclose(var1_spaceid) < 0 ||
	  H5Sclose(var3_spaceid) < 0 ||
	  H5Sclose(dimscale_spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* HELP! If you are reading this in the future, and time
       * machines have been invented, please come back to July 10,
       * 2005, the Java Java coffee shop in Lafayette, 8:00 am MST +-
       * 20 minutes. Bring back some advanced weapons systems to
       * destroy the sound system here, which is playing 50's rock and
       * roll. Do-op, do-op, la-ma la-ma, ding dong. Save me!!! (Mind
       * you, James Brown is a different story!) */
   }
   SUMMARIZE_ERR;
   printf("*** Checking that simple dimscale file can be read...");
   {
      hid_t fileid, grpid, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[STR_LEN + 1];
      htri_t is_scale;
      int num_scales;

      /* Reopen the file and group. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, GRP_NAME)) < 0) ERR;
      
      /* Loop through datasets to find variables. */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of the
	  * object. Confusingly, this is a different type than the type
	  * of a variable. This type might be better called "class" or
	  * "type of type"  */
	 if ((obj_class = H5Gget_objtype_by_idx(grpid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(grpid, i, obj_name, STR_LEN) < 0) ERR;
	 /*printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", obj_class, obj_name);*/

	 /* Deal with groups and datasets. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:

	       /*Close the last datasetid, if one is open. */
	       if (datasetid > 0)
	       {
		  H5Dclose(datasetid);
	       }
	       
	       if ((datasetid = H5Dopen(grpid, obj_name)) < 0) ERR;
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale && strcmp(obj_name, DIMSCALE_NAME)) ERR;
	       if (is_scale)
	       {
		  char nom_de_quincey[STR_LEN+1];

		  /* A dimscale comes with a NAME attribute, in
		   * addition to its real name. */
		  if (H5DSget_scale_name(datasetid, nom_de_quincey, 
					 STR_LEN) < 0) ERR;
		  if (strcmp(nom_de_quincey, NAME_ATTRIBUTE)) ERR;

		  /*printf("found scale %s, NAME %s\n", obj_name, nom_de_quincey);*/

	       }
	       else
	       {
		  char label[STR_LEN+1];

		  /* Here's how to get the number of scales attached
		   * to the dataset. I would think that this would
		   * return 0 scales for a dataset that doesn't have
		   * scales, but instead it errors. So take an error
		   * to be the same as no dimension scales. */
		  num_scales = H5DSget_num_scales(datasetid, 0);
		  if (strcmp(obj_name, VAR1_NAME) == 0 && num_scales != 1) ERR;
		  if (strcmp(obj_name, VAR2_NAME) == 0 && num_scales > 0) ERR;
		  if (strcmp(obj_name, VAR3_NAME) == 0 && num_scales != 1) ERR;
		  
		  /* There's also a label for dimension 0 of var1. */
		  if (strcmp(obj_name, VAR1_NAME) == 0)
		  {
		     if (H5DSget_label(datasetid, 0, label, STR_LEN) < 0) ERR;
		     if (strcmp(label, FIFTIES_SONG)) ERR;
		  }
	       }
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Dclose(datasetid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Creating simple dimension scales file with lots of datasets...");

#define NUM_DATASETS 500
   {
      hid_t fileid, grpid, dimscaleid;
      hid_t dimscale_spaceid, var1_spaceid;
      hid_t var1_datasetid[NUM_DATASETS];
      hsize_t dims[2] = {DIM1_LEN, DIM2_LEN};
      hsize_t dimscale_dims[1] = {DIM1_LEN};
      char var_name[STR_LEN + 1];
      int v;

      /* Open file and create group. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, 
			      H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gcreate(fileid, GRP_NAME, 0)) < 0) ERR;
      
      /* Create our dimension scale. Use the built-in NAME attribute
       * on the dimscale. */
      if ((dimscale_spaceid = H5Screate_simple(1, dimscale_dims, 
					       dimscale_dims)) < 0) ERR;
      if ((dimscaleid = H5Dcreate(grpid, DIMSCALE_NAME, H5T_NATIVE_INT, 
				  dimscale_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(dimscaleid, NAME_ATTRIBUTE) < 0) ERR;

      /* Create many 1D datasets which use the dimscale. */
      if ((var1_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      for (v = 0; v < NUM_DATASETS; v++)
      {
	 sprintf(var_name, "var_%d", v);
	 if ((var1_datasetid[v] = H5Dcreate(grpid, var_name, H5T_NATIVE_INT, 
					    var1_spaceid, H5P_DEFAULT)) < 0) ERR;
	 if (H5DSattach_scale(var1_datasetid[v], dimscaleid, 0) < 0) ERR;
      }

      /* Close up the shop. */
      for (v = 0; v < NUM_DATASETS; v++)
	 if (H5Dclose(var1_datasetid[v]) < 0) ERR;
      if (H5Dclose(dimscaleid) < 0 ||
	  H5Sclose(var1_spaceid) < 0 ||
	  H5Sclose(dimscale_spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Creating a file with an unlimited dimension scale...");

   {
      hid_t fileid, grpid, spaceid, datasetid, dimscaleid, cparmsid;
      hsize_t dims[1] = {1}, maxdims[1] = {H5S_UNLIMITED};

      /* Create file and group. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, 
			      H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gcreate(fileid, GRP_NAME, 0)) < 0) ERR;

      if ((spaceid = H5Screate_simple(1, dims, maxdims)) < 0) ERR;

      /* Modify dataset creation properties, i.e. enable chunking  */
      if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      if (H5Pset_chunk(cparmsid, 1, dims) < 0) ERR;

      /* Create our dimension scale, as an unlimited dataset. */
      if ((dimscaleid = H5Dcreate(grpid, DIMSCALE_NAME, H5T_NATIVE_INT, 
				  spaceid, cparmsid)) < 0) ERR;
      if (H5DSset_scale(dimscaleid, NAME_ATTRIBUTE) < 0) ERR;

      /* Create a variable which uses it. */
      if ((datasetid = H5Dcreate(grpid, VAR1_NAME, H5T_NATIVE_INT, 
				 spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(datasetid, dimscaleid, 0) < 0) ERR;
      if (H5DSset_label(datasetid, 0, "dimension label") < 0) ERR;

      /* Close up the shop. */
      if (H5Dclose(dimscaleid) < 0 ||
	  H5Dclose(datasetid) < 0 ||
	  H5Sclose(spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
#ifdef EXTRA_TESTS
   printf("*** Checking that unlimited dimscale file can be read...");

   {
      hid_t fileid, grpid, spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[STR_LEN + 1];
      htri_t is_scale;
      int num_scales;
      hsize_t dims[1], maxdims[1];

      /* Reopen the file and group. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, GRP_NAME)) < 0) ERR;
      
      /* Loop through datasets to find variables. */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(grpid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(grpid, i, obj_name, STR_LEN) < 0) ERR;
	 /*printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", obj_class, obj_name);*/

	 /* Deal with groups and datasets. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:

	       /*Close the last datasetid, if one is open. */
	       if (datasetid > 0)
	       {
		  H5Dclose(datasetid);
		  datasetid = 0;
	       }
	       
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen(grpid, obj_name)) < 0) ERR;

	       /* This should be an unlimited dataset. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if (maxdims[0] != H5S_UNLIMITED) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale && strcmp(obj_name, DIMSCALE_NAME)) ERR;
	       if (is_scale)
	       {
		  char nom_de_quincey[STR_LEN+1];

		  /* A dimscale comes with a NAME attribute, in
		   * addition to its real name. */
		  if (H5DSget_scale_name(datasetid, nom_de_quincey, STR_LEN) < 0) ERR;
		  /*printf("found scale %s, NAME %s\n", obj_name, nom_de_quincey);*/

	       }
	       else
	       {
		  char label[STR_LEN+1];
		  int visitor_data = 0;

		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  if (H5DSiterate_scales(datasetid, 0, NULL, alien_visitor, 
					 &visitor_data) < 0) ERR;
		  
		  /* There's also a label for dimension 0. */
		  if (H5DSget_label(datasetid, 0, label, STR_LEN) < 0) ERR;

		  /*printf("found non-scale dataset %s, label %s\n", obj_name, label);*/
	       }
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Dclose(datasetid) < 0 ||
	  H5Sclose(spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Creating some 3D datasets using shared dimscales...");

   {
#define NDIMS 3
#define TIME_DIM 0      
#define LAT_DIM 1
#define LON_DIM 2
#define LAT_LEN 2
#define LON_LEN 3
#define LAT_NAME "Lat"
#define LON_NAME "Lon"
#define TIME_NAME "Time"
#define PRES_NAME "Pressure"
#define TEMP_NAME "Temperature"

      hid_t fileid, grpid, lat_spaceid, lon_spaceid, time_spaceid, spaceid;
      hid_t lat_scaleid, lon_scaleid, time_scaleid;
      hid_t pres_dsid, temp_dsid, cparmsid;
      hsize_t dims[NDIMS], max_dims[NDIMS];

      /* Create file and group. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
			      H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gcreate(fileid, GRP_NAME, 0)) < 0) ERR;

      /* Create 3 1D spaces for the 3 dimension scale datasets. Time
       * starts out as size 0. It's an unlimited dimension scale. */
      dims[0] = 0;
      max_dims[0] = H5S_UNLIMITED;
      if ((time_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;
      dims[0] = LAT_LEN;
      max_dims[0] = LAT_LEN;
      if ((lat_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;
      dims[0] = LON_LEN;
      max_dims[0] = LON_LEN;
      if ((lon_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;

      /* Enable chunking for unlimited time scale.  */
      if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      dims[TIME_DIM] = 1;
      if (H5Pset_chunk(cparmsid, 1, dims) < 0) ERR;

      /* Create our dimension scales. */
      if ((time_scaleid = H5Dcreate(grpid, TIME_NAME, H5T_NATIVE_INT,
				    time_spaceid, cparmsid)) < 0) ERR;
      if (H5DSset_scale(time_scaleid, TIME_NAME) < 0) ERR;
      if ((lat_scaleid = H5Dcreate(grpid, LAT_NAME, H5T_NATIVE_FLOAT,
				   lat_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lat_scaleid, LAT_NAME) < 0) ERR;
      if ((lon_scaleid = H5Dcreate(grpid, LON_NAME, H5T_NATIVE_FLOAT,
				   lon_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lon_scaleid, LON_NAME) < 0) ERR;

      /* Create a space coresponding to these three dimensions. */
      dims[TIME_DIM] = 0;
      dims[LAT_DIM] = LAT_LEN;
      dims[LON_DIM] = LON_LEN;
      max_dims[TIME_DIM] = H5S_UNLIMITED;
      max_dims[LAT_DIM] = LAT_LEN;
      max_dims[LON_DIM] = LON_LEN;
      if ((spaceid = H5Screate_simple(NDIMS, dims, max_dims)) < 0) ERR;

      /* Create two variables which use them, and attach the dimension scales. */
      dims[TIME_DIM] = 1;
      if (H5Pset_chunk(cparmsid, NDIMS, dims) < 0) ERR;
      if ((pres_dsid = H5Dcreate(grpid, PRES_NAME, H5T_NATIVE_FLOAT,
				 spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(pres_dsid, time_scaleid, 0) < 0) ERR;
      if (H5DSattach_scale(pres_dsid, lat_scaleid, 1) < 0) ERR;
      if (H5DSattach_scale(pres_dsid, lon_scaleid, 2) < 0) ERR;
      if (H5DSset_label(pres_dsid, TIME_DIM, TIME_NAME) < 0) ERR;
      if (H5DSset_label(pres_dsid, LAT_DIM, LAT_NAME) < 0) ERR;
      if (H5DSset_label(pres_dsid, LON_DIM, LON_NAME) < 0) ERR;
      if ((temp_dsid = H5Dcreate(grpid, TEMP_NAME, H5T_NATIVE_FLOAT,
				 spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(temp_dsid, time_scaleid, 0) < 0) ERR;
      if (H5DSattach_scale(temp_dsid, lat_scaleid, 1) < 0) ERR;
      if (H5DSattach_scale(temp_dsid, lon_scaleid, 2) < 0) ERR;
      if (H5DSset_label(temp_dsid, TIME_DIM, TIME_NAME) < 0) ERR;
      if (H5DSset_label(temp_dsid, LAT_DIM, LAT_NAME) < 0) ERR;
      if (H5DSset_label(temp_dsid, LON_DIM, LON_NAME) < 0) ERR;

      /* Close up the shop. */
      if (H5Dclose(pres_dsid) < 0 ||
	  H5Dclose(temp_dsid) < 0 ||
	  H5Dclose(lat_scaleid) < 0 ||
	  H5Dclose(lon_scaleid) < 0 ||
	  H5Dclose(time_scaleid) < 0 ||
	  H5Sclose(spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Checking 3D datasets created with shared dimscales...");

   {
      hid_t fileid, grpid, spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[STR_LEN + 1];
      htri_t is_scale;
      int num_scales;
      hsize_t dims[NDIMS], max_dims[NDIMS];
      int d;

      /* Reopen the file and group. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, GRP_NAME)) < 0) ERR;
      
      /* Loop through datasets to find variables. */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(grpid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(grpid, i, obj_name, STR_LEN) < 0) ERR;
	 /*printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", obj_class, obj_name);*/

	 /* Deal with groups and datasets. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen(grpid, obj_name)) < 0) ERR;
	       /*printf("\nobj_name %s\n", obj_name);*/

	       /* Get the dimensions of this dataset. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, max_dims) < 0) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale)
	       {
		  char nom_de_quincey[STR_LEN+1];

		  /* A dimscale comes with a NAME attribute, in
		   * addition to its real name. */
		  if (H5DSget_scale_name(datasetid, nom_de_quincey, 
					 STR_LEN) < 0) ERR;
		  /*printf("found scale %s, NAME %s id 0x%x\n", obj_name, 
		    nom_de_quincey, datasetid);*/

		  /* Check size depending on name. */
		  if ((!strcmp(obj_name, LAT_NAME) && dims[TIME_DIM] != LAT_LEN) ||
		      (!strcmp(obj_name, LON_NAME) && dims[TIME_DIM] != LON_LEN) ||
		      (!strcmp(obj_name, TIME_NAME) && 
		       max_dims[TIME_DIM] != H5S_UNLIMITED)) ERR;

	       }
	       else
	       {
		  char label[STR_LEN+1];
		  int visitor_data = 0;
		  
		  /* SHould have these dimensions... */
		  if (dims[TIME_DIM] != 0 || dims[LAT_DIM] != LAT_LEN || 
		      dims[LON_DIM] != LON_LEN) ERR;
		  if (max_dims[TIME_DIM] != H5S_UNLIMITED) ERR;

		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn
		   * about them. What I want is the dataset id of each
		   * dimscale. Then... */
		  for (d = 0; d < NDIMS; d++)
		     if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor,
					    &visitor_data) < 0) ERR;
		  /*printf("visitor_data: 0x%x\n", visitor_data);*/
		  
		  /* There's also a label for each dimension. */
		  if (H5DSget_label(datasetid, 0, label, STR_LEN) < 0) ERR;
		  if (strcmp(label, TIME_NAME)) ERR;
		  if (H5DSget_label(datasetid, 1, label, STR_LEN) < 0) ERR;
		  if (strcmp(label, LAT_NAME)) ERR;
		  if (H5DSget_label(datasetid, 2, label, STR_LEN) < 0) ERR;
		  if (strcmp(label, LON_NAME)) ERR;
	       }
	       if (H5Dclose(datasetid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Sclose(spaceid) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Creating 3D datasets using shared dimscales in groups...");

   {
#define FATHER "Adam"
#define GOOD_CHILD "Able"
#define BAD_CHILD "Cain"
#define DISTANCE_LEN 3
#define SMELLINESS_NAME "Smelliness"
#define DISTANCE_NAME "Distance"
#define TIME_NAME "Time"
#define TIME_DIM 0      
#define SMELLINESS_DIM 1
#define DISTANCE_DIM 2
#define GOAT_NAME "Billy_goat_gruff"
#define CAMEL_NAME "Grumpy_the_camel"

      hid_t fileid, smelliness_spaceid, distance_spaceid, time_spaceid, spaceid;
      hid_t adam_grpid, able_grpid, cain_grpid;
      hid_t time_scaleid, smelliness_scaleid, distance_scaleid;
      hid_t goat_dsid, camel_dsid, cparmsid;
      hsize_t dims[NDIMS], max_dims[NDIMS];

      /* Create file and group. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
			      H5P_DEFAULT)) < 0) ERR;
      if ((adam_grpid = H5Gcreate(fileid, FATHER, 0)) < 0) ERR;
      if ((able_grpid = H5Gcreate(adam_grpid, GOOD_CHILD, 0)) < 0) ERR;
      if ((cain_grpid = H5Gcreate(adam_grpid, BAD_CHILD, 0)) < 0) ERR;

      /* Create 3 1D spaces for the 3 dimension scale datasets. Time
       * and smelliness starts out as 0. They are unlimited dimension
       * scales. */
      dims[0] = 0;
      max_dims[0] = H5S_UNLIMITED;
      if ((time_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;
      dims[0] = 0;
      max_dims[0] = H5S_UNLIMITED;
      if ((smelliness_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;
      dims[0] = DISTANCE_LEN;
      max_dims[0] = DISTANCE_LEN;
      if ((distance_spaceid = H5Screate_simple(1, dims, max_dims)) < 0) ERR;

      /* Enable chunking for unlimited time and smelliness scale. */
      if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      dims[0] = 1;
      if (H5Pset_chunk(cparmsid, 1, dims) < 0) ERR;

      /* Create our dimension scales. */
      if ((time_scaleid = H5Dcreate(adam_grpid, TIME_NAME, H5T_NATIVE_INT,
				    time_spaceid, cparmsid)) < 0) ERR;
      if (H5DSset_scale(time_scaleid, TIME_NAME) < 0) ERR;
      if ((smelliness_scaleid = H5Dcreate(adam_grpid, SMELLINESS_NAME, H5T_NATIVE_FLOAT,
					  smelliness_spaceid, cparmsid)) < 0) ERR;
      if (H5DSset_scale(smelliness_scaleid, SMELLINESS_NAME) < 0) ERR;
      if ((distance_scaleid = H5Dcreate(adam_grpid, DISTANCE_NAME, H5T_NATIVE_FLOAT,
					distance_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(distance_scaleid, DISTANCE_NAME) < 0) ERR;

      /* Create a space coresponding to these three dimensions. */
      dims[TIME_DIM] = 0;
      dims[SMELLINESS_DIM] = 0;
      dims[DISTANCE_DIM] = DISTANCE_LEN;
      max_dims[TIME_DIM] = H5S_UNLIMITED;
      max_dims[SMELLINESS_DIM] = H5S_UNLIMITED;
      max_dims[DISTANCE_DIM] = DISTANCE_LEN;
      if ((spaceid = H5Screate_simple(NDIMS, dims, max_dims)) < 0) ERR;

      /* Set up chunking for our 3D vars. */
      dims[TIME_DIM] = 1;
      dims[SMELLINESS_DIM] = 1;
      if (H5Pset_chunk(cparmsid, NDIMS, dims) < 0) ERR;

      /* Create two variables which use them, and attach the dimension scales. */
      if ((goat_dsid = H5Dcreate(able_grpid, GOAT_NAME, H5T_NATIVE_FLOAT,
				 spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(goat_dsid, time_scaleid, 0) < 0) ERR;
      if (H5DSattach_scale(goat_dsid, smelliness_scaleid, 1) < 0) ERR;
      if (H5DSattach_scale(goat_dsid, distance_scaleid, 2) < 0) ERR;
      if ((camel_dsid = H5Dcreate(cain_grpid, CAMEL_NAME, H5T_NATIVE_FLOAT,
				  spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(camel_dsid, time_scaleid, 0) < 0) ERR;
      if (H5DSattach_scale(camel_dsid, smelliness_scaleid, 1) < 0) ERR;
      if (H5DSattach_scale(camel_dsid, distance_scaleid, 2) < 0) ERR;

      /* Close up the shop. */
      if (H5Dclose(goat_dsid) < 0 ||
	  H5Dclose(camel_dsid) < 0 ||
	  H5Dclose(smelliness_scaleid) < 0 ||
	  H5Dclose(distance_scaleid) < 0 ||
	  H5Dclose(time_scaleid) < 0 ||
	  H5Sclose(spaceid) < 0 ||
	  H5Gclose(cain_grpid) < 0 ||
	  H5Gclose(able_grpid) < 0 ||
	  H5Gclose(adam_grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Checking 3D datasets in groups created with shared dimscales...");

   {
      hid_t fileid, grpid;

      /* Reopen the file and group. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, FATHER)) < 0) ERR;

      /* If we can't scan the group, crash into a flaming heap of
       * smoking, smoldering rubbish. */
      if (rec_scan_group(grpid)) ERR;
      
      /* Close up the shop. */
      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
#endif
   FINAL_RESULTS;
}
コード例 #16
0
int
rec_scan_group(hid_t grpid)
{
   hid_t spaceid, datasetid = 0, child_grpid;
   hsize_t num_obj, i;
   int obj_class;
   char obj_name[STR_LEN + 1];
   htri_t is_scale;
   int num_scales;
   hsize_t dims[MAX_DIMS], max_dims[MAX_DIMS];
   int ndims, d;
   
   /* Loop through datasets to find variables. */
   if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
   for (i=0; i<num_obj; i++)
   {
      /* Get the type (i.e. group, dataset, etc.), and the name of
       * the object. */
      if ((obj_class = H5Gget_objtype_by_idx(grpid, i)) < 0) ERR;
      if (H5Gget_objname_by_idx(grpid, i, obj_name, STR_LEN) < 0) ERR;
      /*printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", 
	obj_class, obj_name);*/

      /* Deal with groups and datasets, ignore the rest. */
      switch(obj_class)
      {
	 case H5G_GROUP:
	    if ((child_grpid = H5Gopen(grpid, obj_name)) < 0) ERR;
	    if (rec_scan_group(child_grpid)) ERR;
	    break;
	 case H5G_DATASET:
	    /* Open the dataset. */
	    if ((datasetid = H5Dopen(grpid, obj_name)) < 0) ERR;
	    /*printf("\nobj_name %s\n", obj_name);*/

	    /* Get the dimensions of this dataset. */
	    if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	    if ((ndims = H5Sget_simple_extent_ndims(spaceid)) < 0) ERR;
	    if (ndims > MAX_DIMS) ERR;
	    if (H5Sget_simple_extent_dims(spaceid, dims, max_dims) < 0) ERR;

	    /* Is this a dimscale? */
	    if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	    if (is_scale)
	    {
	       /*printf("dimension scale! Hoorah for the Pirate King!\n");*/
	    }
	    else
	    {
	       int visitor_data = 0;
		  
	       /* Here's how to get the number of scales attached
		* to the dataset's dimension 0. */
	       if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
	       if (num_scales != 1) ERR;

	       /* Go through all dimscales for this var and learn about them. */
	       for (d = 0; d < ndims; d++)
		  if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor,
					 &visitor_data) < 0) ERR;
	    }
	    if (H5Dclose(datasetid) < 0) ERR;
	    break;
	 case H5G_TYPE:
	    printf("found a type!\n");
	    break;
	 case H5G_LINK:
	    printf("found a link! Yikes!\n");
	    break;
	 default:
	    printf("Unknown object class %d!", obj_class);
      }
   }

   return 0;
}
コード例 #17
0
ファイル: SalomeIO.cpp プロジェクト: rushs777/femus
  /// @todo extend to Wegdes (aka Prisms)
void SalomeIO::read(const std::string& name, vector < vector < double> > &coords, const double Lref, std::vector<bool> &type_elem_flag) {
   
    Mesh& mesh = GetMesh();
    mesh.SetLevel(0);

    hsize_t dims[2];
    
   // compute number of menus ===============
    hid_t  file_id = H5Fopen(name.c_str(),H5F_ACC_RDWR, H5P_DEFAULT);
    
    hid_t  gid = H5Gopen(file_id,mesh_ensemble.c_str(),H5P_DEFAULT);
      
    hsize_t     n_menus;
    hid_t status= H5Gget_num_objs(gid, &n_menus);  // number of menus
    if(status !=0) { std::cout << "Number of mesh menus not found"; abort(); }
    

    // compute number of groups and number of meshes ===============
    std::vector<std::string>  mesh_menus;
    std::vector<std::string>  group_menus;
    
    unsigned n_groups = 0;
    unsigned n_meshes = 0;
   
    for (unsigned j=0; j<n_menus; j++) {
      
     char *  menu_names_j = new char[max_length];
     H5Gget_objname_by_idx(gid,j,menu_names_j,max_length); ///@deprecated see the HDF doc to replace this
     std::string tempj(menu_names_j);
     
  
     if  (tempj.substr(0,5).compare("Group") == 0) {
       n_groups++;
       group_menus.push_back(tempj);
     }
     else if  (tempj.substr(0,4).compare("Mesh") == 0) {
       n_meshes++;
       mesh_menus.push_back(tempj);
     }
     
    }
   // compute number of groups and number of meshes ===============
    
      unsigned int n_elements_b_bb = 0;
      
   // meshes ======================== 
    for (unsigned j=0; j< n_meshes; j++) {
      
     std::string tempj = mesh_menus[j];

// dimension ===============
     /// @todo this determination of the dimension from the mesh file would not work with a 2D mesh embedded in 3D
  std::string my_mesh_name_dir = mesh_ensemble +  "/" + tempj + "/" +  aux_zeroone + "/" + elem_list + "/";  ///@todo here we have to loop
  
  hsize_t     n_fem_type;
  hid_t       gid = H5Gopen(file_id,my_mesh_name_dir.c_str(),H5P_DEFAULT);
  hid_t status0 = H5Gget_num_objs(gid, &n_fem_type);
  if(status0 !=0) {std::cout << "SalomeIO::read_fem_type:   H5Gget_num_objs not found"; abort();}
  FindDimension(gid,tempj,n_fem_type);
  H5Gclose(gid);

  if (mesh.GetDimension() != n_fem_type) { std::cout << "Mismatch between dimension and number of element types" << std::endl; abort(); }
  
// fem type ===============
  std::vector<std::string> el_fe_type(mesh.GetDimension());

   ReadFE(file_id,el_fe_type, n_fem_type, my_mesh_name_dir);
     
   //   // read NODAL COORDINATES **************** C
   std::string coord_dataset = mesh_ensemble +  "/" + tempj + "/" +  aux_zeroone + "/" + node_list + "/" + coord_list + "/";  ///@todo here we have to loop

  hid_t dtset = H5Dopen(file_id,coord_dataset.c_str(),H5P_DEFAULT);
  
  // SET NUMBER OF NODES
  hid_t filespace = H5Dget_space(dtset);    /* Get filespace handle first. */
  hid_t status  = H5Sget_simple_extent_dims(filespace, dims, NULL);
  if(status ==0) std::cerr << "SalomeIO::read dims not found";
  // reading xyz_med
  unsigned int n_nodes = dims[0]/mesh.GetDimension();
  double   *xyz_med = new double[dims[0]];
  std::cout << " Number of nodes in med file " <<  n_nodes << " " <<  std::endl;
  
  mesh.SetNumberOfNodes(n_nodes);
  
  // SET NODE COORDINATES  
    coords[0].resize(n_nodes);
    coords[1].resize(n_nodes);
    coords[2].resize(n_nodes);

  status=H5Dread(dtset,H5T_NATIVE_DOUBLE,H5S_ALL,H5S_ALL,H5P_DEFAULT,xyz_med);
  H5Dclose(dtset);
  
   if (mesh.GetDimension()==3) {
    for (unsigned j=0; j<n_nodes; j++) {
      coords[0][j] = xyz_med[j]/Lref;
      coords[1][j] = xyz_med[j+n_nodes]/Lref;
      coords[2][j] = xyz_med[j+2*n_nodes]/Lref;
    }
  }

  else if (mesh.GetDimension()==2) {
    for (unsigned j=0; j<n_nodes; j++) {
      coords[0][j] = xyz_med[j]/Lref;
      coords[1][j] = xyz_med[j+n_nodes]/Lref;
      coords[2][j] = 0.;
    }
  }

  else if (mesh.GetDimension()==1) {
    for (unsigned j=0; j<n_nodes; j++) {
      coords[0][j] = xyz_med[j]/Lref;
      coords[1][j] = 0.;
      coords[2][j] = 0.;
    }
  }
  
  delete[] xyz_med;
    
    //   // end read NODAL COORDINATES ************* C

    
    //   // read ELEMENT/cell ******************** B
  std::string node_name_dir = my_mesh_name_dir +  el_fe_type[mesh.GetDimension()-1] + "/" + connectivity;
  hid_t dtset2 = H5Dopen(file_id,node_name_dir.c_str(),H5P_DEFAULT);
  filespace = H5Dget_space(dtset2);
  status  = H5Sget_simple_extent_dims(filespace, dims, NULL);
  if(status ==0) {std::cerr << "SalomeIO::read dims not found"; abort();}

  // DETERMINE NUMBER OF NODES PER ELEMENT
  unsigned Node_el = FindElemNodes( el_fe_type[mesh.GetDimension()-1] );
  
  const int dim_conn = dims[0];
  unsigned int n_elements = dim_conn/Node_el;
  
  // SET NUMBER OF ELEMENTS
   mesh.SetNumberOfElements(n_elements);
 
   
  int * conn_map = new  int[dim_conn];
  std::cout << " Number of elements in med file " <<  n_elements <<  std::endl;
  status=H5Dread(dtset2,H5T_NATIVE_INT,H5S_ALL,H5S_ALL,H5P_DEFAULT,conn_map);
  if(status !=0) {std::cout << "SalomeIO::read: connectivity not found"; abort();}
  H5Dclose(dtset2);

  mesh.el = new elem(n_elements);    ///@todo check where this is going to be deleted
 
   // BOUNDARY (and BOUNDARY of the BOUNDARY in 3D) =========================
 for (unsigned i=0; i < mesh.GetDimension()-1; i++) {
  hsize_t dims_i[2]; 
  std::string node_name_dir_i = my_mesh_name_dir + el_fe_type[i] + "/" + dofobj_indices;
  hid_t dtset_i = H5Dopen(file_id,node_name_dir_i.c_str(),H5P_DEFAULT);
  filespace = H5Dget_space(dtset_i);
  hid_t status  = H5Sget_simple_extent_dims(filespace, dims_i, NULL);
  if(status ==0) { std::cerr << "SalomeIO::read dims not found"; abort(); }
  n_elements_b_bb += dims_i[0];
  H5Dclose(dtset_i);
  }
  // BOUNDARY =========================

  
  for (unsigned iel=0; iel<n_elements; iel++) {
    mesh.el->SetElementGroup(iel,1);
    unsigned nve = Node_el;  /// @todo this is only one element type
    if (nve==27) {
      type_elem_flag[0]=type_elem_flag[3]=true;
      mesh.el->AddToElementNumber(1,"Hex");
      mesh.el->SetElementType(iel,HEX);
    } else if (nve==10) {
      type_elem_flag[1]=type_elem_flag[4]=true;
      mesh.el->AddToElementNumber(1,"Tet");
      mesh.el->SetElementType(iel,TET);
    } else if (nve==18) {
      type_elem_flag[2]=type_elem_flag[3]=type_elem_flag[4]=true;
      mesh.el->AddToElementNumber(1,"Wedge");
      mesh.el->SetElementType(iel,WEDGE);
    } else if (nve==9) {
      type_elem_flag[3]=true;
      mesh.el->AddToElementNumber(1,"Quad");
      mesh.el->SetElementType(iel,QUAD);
    }
    else if (nve==6 && mesh.GetDimension()==2) {
      type_elem_flag[4]=true;
      mesh.el->AddToElementNumber(1,"Triangle");
      mesh.el->SetElementType(iel,TRI);
    }
    else if (nve==3 && mesh.GetDimension()==1) {
      mesh.el->AddToElementNumber(1,"Line");
      mesh.el->SetElementType(iel,LINE);
    } else {
      std::cout<<"Error! Invalid element type in reading  File!"<<std::endl;
      std::cout<<"Error! Use a second order discretization"<<std::endl;
      exit(0);
    }
    for (unsigned i=0; i<nve; i++) {
      unsigned inode = SalomeToFemusVertexIndex[mesh.el->GetElementType(iel)][i];
      mesh.el->SetElementVertexIndex(iel,inode,conn_map[iel+i*n_elements]);
    }
  }

    //   // end read  ELEMENT/CELL **************** B
    
  // clean
  delete [] conn_map;

        }   //end meshes

        
   mesh.el->SetElementGroupNumber(n_groups);
   
       // read GROUP **************** E   
   //we assume that these are VOLUME groups
   //in general, I'd say that a group can only have ONE element type (should study the possibility of hybrid mesh)
   
     for (unsigned j=0; j<n_groups; j++) {
       
       const uint n_fe_types_for_groups = 1; // so far we have this assumption
       
     std::string tempj = group_menus[j];
     std::string my_mesh_name_dir = mesh_ensemble +  "/" + tempj + "/" +  aux_zeroone + "/" + elem_list + "/";  ///@todo here we have to loop
   
       /// @todo check the underscores according to our naming standard
       
       // strip the first number to get the group number 
       // strip the second number to get the group material
       int gr_name = atoi(tempj.substr(6,1).c_str());  
       int gr_mat =  atoi(tempj.substr(8,1).c_str());

  std::vector<std::string> el_fe_type(mesh.GetDimension());
      
     ReadFE(file_id, el_fe_type, n_fe_types_for_groups, my_mesh_name_dir);
       
    std::string group_dataset = mesh_ensemble +  "/" + tempj + "/" +  aux_zeroone + "/" + elem_list + "/" + el_fe_type[mesh.GetDimension()-1] + "/" + dofobj_indices;  ///@todo here we have to loop
    
  hid_t dtset = H5Dopen(file_id,group_dataset.c_str(),H5P_DEFAULT);
  hid_t filespace = H5Dget_space(dtset);
  hid_t status  = H5Sget_simple_extent_dims(filespace, dims, NULL);
  int * elem_indices = new int[dims[0]];
  status=H5Dread(dtset,H5T_NATIVE_INT,H5S_ALL,H5S_ALL,H5P_DEFAULT,elem_indices);

  for (unsigned i=0; i < dims[0]; i++) {
           mesh.el->SetElementGroup(elem_indices[i] -1 - n_elements_b_bb, gr_name);
           mesh.el->SetElementMaterial(elem_indices[i] -1 - n_elements_b_bb ,gr_mat);
    }
	
	
   H5Dclose(dtset);
   delete [] elem_indices;
   
    }
     //   // end read GROUP **************** E
 
 
    status = H5Fclose(file_id);
    
    //loop over volume elements
    //extract faces
    
    
    // 
//   unsigned nbcd;
 
//   // read boundary **************** D
//   inf.open(name.c_str());
//   if (!inf) {
//     std::cout<<"Generic-mesh file "<< name << " cannot read boudary\n";
//     exit(0);
//   }
//   for (unsigned k=0; k<nbcd; k++) {
//     while (str2.compare("CONDITIONS") != 0) inf >> str2;
//     inf >> str2;
//     int value;
//     unsigned nface;
//     inf >>value>>str2>>nface>>str2>>str2;
//     value=-value-1;
//     for (unsigned i=0; i<nface; i++) {
//       unsigned iel,iface;
//       inf>>iel>>str2>>iface;
//       iel--;
//       iface=SalomeIO::SalomeToFemusFaceIndex[mesh.el->GetElementType(iel)][iface-1u];
//       mesh.el->SetFaceElementIndex(iel,iface,value);
//     }
//     inf >> str2;
//     if (str2.compare("ENDOFSECTION") != 0) {
//       std::cout<<"error boundary data mesh"<<std::endl;
//       exit(0);
//     }
//   }
//   inf.close();
//   // end read boundary **************** D
 
}
コード例 #18
0
ファイル: tst_h_atts3.c プロジェクト: dschwen/libmesh
int
main()
{
   printf("\n*** Checking HDF5 attribute functions some more.\n");
   printf("*** Creating tst_xplatform2_3.nc with HDF only...");
   {
      hid_t fapl_id, fcpl_id;
      size_t chunk_cache_size = MY_CHUNK_CACHE_SIZE;
      size_t chunk_cache_nelems = CHUNK_CACHE_NELEMS;
      float chunk_cache_preemption = CHUNK_CACHE_PREEMPTION;
      hid_t fileid, grpid, attid, spaceid;
      hid_t s1_typeid, vlen_typeid, s3_typeid;
      hid_t file_typeid1[NUM_OBJ], native_typeid1[NUM_OBJ];
      hid_t file_typeid2, native_typeid2;
      hsize_t num_obj;
      H5O_info_t obj_info;
      char obj_name[STR_LEN + 1];
      hsize_t dims[1] = {ATT_LEN}; /* netcdf attributes always 1-D. */
      struct s1
      {
	 float x;
	 double y;
      };
      struct s3
      {
	 hvl_t data[NUM_VL];
      };
      /* cvc stands for "Compound with Vlen of Compound." */
      struct s3 cvc_out[ATT_LEN];
      int i, j, k;

      /* Create some output data: a struct s3 array (length ATT_LEN)
       * which holds an array of vlen (length NUM_VL) of struct s1. */
      for (i = 0; i < ATT_LEN; i++)
	 for (j = 0; j < NUM_VL; j++)
	 {
	    cvc_out[i].data[j].len = i + 1; 
	    if (!(cvc_out[i].data[j].p = calloc(sizeof(struct s1), cvc_out[i].data[j].len))) ERR;
	    for (k = 0; k < cvc_out[i].data[j].len; k++)
	    {
	       ((struct s1 *)cvc_out[i].data[j].p)[k].x = 42.42;
	       ((struct s1 *)cvc_out[i].data[j].p)[k].y = 2.0;
	    }
	 }

      /* Create the HDF5 file, with cache control, creation order, and
       * all the timmings. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if (H5Pset_fclose_degree(fapl_id, H5F_CLOSE_STRONG)) ERR;
      if (H5Pset_cache(fapl_id, 0, chunk_cache_nelems, chunk_cache_size, 
		       chunk_cache_preemption) < 0) ERR;
      if (H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST, 
			       H5F_LIBVER_LATEST) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED | 
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED | 
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;
      if (H5Pclose(fapl_id) < 0) ERR;
      if (H5Pclose(fcpl_id) < 0) ERR;

      /* Open the root group. */
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;

      /* Create the compound type for struct s1. */
      if ((s1_typeid = H5Tcreate(H5T_COMPOUND, sizeof(struct s1))) < 0) ERR;
      if (H5Tinsert(s1_typeid, X_NAME, offsetof(struct s1, x), 
		    H5T_NATIVE_FLOAT) < 0) ERR;
      if (H5Tinsert(s1_typeid, Y_NAME, offsetof(struct s1, y), 
		    H5T_NATIVE_DOUBLE) < 0) ERR;
      if (H5Tcommit(grpid, S1_TYPE_NAME, s1_typeid) < 0) ERR;

      /* Create a vlen type. Its a vlen of struct s1. */
      if ((vlen_typeid = H5Tvlen_create(s1_typeid)) < 0) ERR;
      if (H5Tcommit(grpid, VLEN_TYPE_NAME, vlen_typeid) < 0) ERR;

      /* Create the struct s3 type, which contains the vlen. */
      if ((s3_typeid = H5Tcreate(H5T_COMPOUND, sizeof(struct s3))) < 0) ERR;
      if (H5Tinsert(s3_typeid, VL_NAME, offsetof(struct s3, data), 
		    vlen_typeid) < 0) ERR;
      if (H5Tcommit(grpid, S3_TYPE_NAME, s3_typeid) < 0) ERR;

      /* Create an attribute of this new type. */
      if ((spaceid = H5Screate_simple(1, dims, NULL)) < 0) ERR;
      if ((attid = H5Acreate(grpid, S3_ATT_NAME, s3_typeid, spaceid, 
			     H5P_DEFAULT)) < 0) ERR;
      if (H5Awrite(attid, s3_typeid, cvc_out) < 0) ERR;

      /* Close the types. */
      if (H5Tclose(s1_typeid) < 0 ||
	  H5Tclose(vlen_typeid) < 0 ||
	  H5Tclose(s3_typeid) < 0) ERR;

      /* Close the att. */
      if (H5Aclose(attid) < 0) ERR;
      
      /* Close the space. */
      if (H5Sclose(spaceid) < 0) ERR;

      /* Close the group and file. */
      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Reopen the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, "/")) < 0) ERR;

      /* How many objects in this group? (There should be 3, the
       * types. Atts don't count as objects to HDF5.) */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      if (num_obj != NUM_OBJ) ERR;

      /* For each object in the group... */
      for (i = 0; i < num_obj; i++)
      {
	 /* Get the name, and make sure this is a type. */
	 if (H5Oget_info_by_idx(grpid, ".", H5_INDEX_CRT_ORDER, H5_ITER_INC,
				i, &obj_info, H5P_DEFAULT) < 0) ERR;
	 if (H5Lget_name_by_idx(grpid, ".", H5_INDEX_NAME, H5_ITER_INC, i,
				obj_name, STR_LEN + 1, H5P_DEFAULT) < 0) ERR;
	 if (obj_info.type != H5O_TYPE_NAMED_DATATYPE) ERR;

	 /* Get the typeid and native typeid. */
	 if ((file_typeid1[i] = H5Topen2(grpid, obj_name, H5P_DEFAULT)) < 0) ERR;
	 if ((native_typeid1[i] = H5Tget_native_type(file_typeid1[i], 
						     H5T_DIR_DEFAULT)) < 0) ERR;
      }

      /* There is one att: open it by index. */
      if ((attid = H5Aopen_idx(grpid, 0)) < 0) ERR;

      /* Get file and native typeids of the att. */
      if ((file_typeid2 = H5Aget_type(attid)) < 0) ERR;
      if ((native_typeid2 = H5Tget_native_type(file_typeid2, H5T_DIR_DEFAULT)) < 0) ERR;

      /* Close the attribute. */
      if (H5Aclose(attid) < 0) ERR;

      /* Close the typeids. */
      for (i = 0; i < NUM_OBJ; i++)
      {
	 if (H5Tclose(file_typeid1[i]) < 0) ERR;
	 if (H5Tclose(native_typeid1[i]) < 0) ERR;
      }
      if (H5Tclose(file_typeid2) < 0) ERR;
      if (H5Tclose(native_typeid2) < 0) ERR;

      /* Close the group and file. */
      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Deallocate our vlens. */
      for (i = 0; i < ATT_LEN; i++)
	 for (j = 0; j < NUM_VL; j++)
	    free(cvc_out[i].data[j].p);
   }
   SUMMARIZE_ERR;
   printf("*** Checking vlen of compound file...");
   {
#define NUM_OBJ_1 1
#define ATT_NAME "Poseidon"
      hid_t fapl_id, fcpl_id;
      hid_t fileid, grpid, attid, spaceid;
      hid_t vlen_typeid;
      hid_t file_typeid1[NUM_OBJ_1], native_typeid1[NUM_OBJ_1];
      hid_t file_typeid2, native_typeid2;
      hsize_t num_obj;
      H5O_info_t obj_info;
      char obj_name[STR_LEN + 1];
      hsize_t dims[1] = {ATT_LEN}; /* netcdf attributes always 1-D. */

      /* vc stands for "Vlen of Compound." */
      hvl_t vc_out[ATT_LEN];
      int i, k;

      /* Create some output data: an array of vlen (length ATT_LEN) of
       * int. */
      for (i = 0; i < ATT_LEN; i++)
      {
	 vc_out[i].len = i + 1; 
	 if (!(vc_out[i].p = calloc(sizeof(int), vc_out[i].len))) ERR;
	 for (k = 0; k < vc_out[i].len; k++)
	    ((int *)vc_out[i].p)[k] = 42;
      }
      
      /* Create the HDF5 file with creation order. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED | 
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED | 
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;
      if (H5Pclose(fapl_id) < 0) ERR;
      if (H5Pclose(fcpl_id) < 0) ERR;
      
      /* Open the root group. */
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;
      
      /* Create a vlen type. Its a vlen of int. */
      if ((vlen_typeid = H5Tvlen_create(H5T_NATIVE_INT)) < 0) ERR;
      if (H5Tcommit(grpid, VLEN_TYPE_NAME, vlen_typeid) < 0) ERR;
      
      /* Create an attribute of this new type. */
      if ((spaceid = H5Screate_simple(1, dims, NULL)) < 0) ERR;
      if ((attid = H5Acreate(grpid, ATT_NAME, vlen_typeid, spaceid, 
			     H5P_DEFAULT)) < 0) ERR;
      if (H5Awrite(attid, vlen_typeid, vc_out) < 0) ERR;
      
      /* Close the type. */
      if (H5Tclose(vlen_typeid) < 0) ERR;
	  
      /* Close the att. */
      if (H5Aclose(attid) < 0) ERR;
      
      /* Close the space. */
      if (H5Sclose(spaceid) < 0) ERR;

      /* Close the group and file. */
      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Reopen the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen(fileid, "/")) < 0) ERR;

      /* How many objects in this group? (There should be 2, the
       * types. Atts don't count as objects to HDF5.) */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;
      if (num_obj != NUM_OBJ_1) ERR;

      /* For each object in the group... */
      for (i = 0; i < num_obj; i++)
      {
	 /* Get the name, and make sure this is a type. */
	 if (H5Oget_info_by_idx(grpid, ".", H5_INDEX_CRT_ORDER, H5_ITER_INC,
				i, &obj_info, H5P_DEFAULT) < 0) ERR;
	 if (H5Lget_name_by_idx(grpid, ".", H5_INDEX_NAME, H5_ITER_INC, i,
				obj_name, STR_LEN + 1, H5P_DEFAULT) < 0) ERR;
	 if (obj_info.type != H5O_TYPE_NAMED_DATATYPE) ERR;

	 /* Get the typeid and native typeid. */
	 if ((file_typeid1[i] = H5Topen2(grpid, obj_name, H5P_DEFAULT)) < 0) ERR;
	 if ((native_typeid1[i] = H5Tget_native_type(file_typeid1[i],
						     H5T_DIR_DEFAULT)) < 0) ERR;
      }

      /* There is one att: open it by index. */
      if ((attid = H5Aopen_idx(grpid, 0)) < 0) ERR;

      /* Get file and native typeids of the att. */
      if ((file_typeid2 = H5Aget_type(attid)) < 0) ERR;
      if ((native_typeid2 = H5Tget_native_type(file_typeid2, H5T_DIR_DEFAULT)) < 0) ERR;

      /* Close the attribute. */
      if (H5Aclose(attid) < 0) ERR;

      /* Close the typeids. */
      for (i = 0; i < NUM_OBJ_1; i++)
      {
	 if (H5Tclose(file_typeid1[i]) < 0) ERR;
	 if (H5Tclose(native_typeid1[i]) < 0) ERR;
      }
      if (H5Tclose(file_typeid2) < 0) ERR;
      if (H5Tclose(native_typeid2) < 0) ERR;

      /* Close the group and file. */
      if (H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Deallocate our vlens. */
      for (i = 0; i < ATT_LEN; i++)
	 free(vc_out[i].p);
   }
   SUMMARIZE_ERR;
   FINAL_RESULTS;
}
コード例 #19
0
ファイル: hdf5dataset.cpp プロジェクト: dlsyaim/osgEarthX
herr_t HDF5CreateGroupObjs(hid_t hHDF5, const char *pszObjName, 
			   void *poHObjParent)
{
    herr_t	ret;			/* error return status */
    hid_t	hGroupID;		/* identifier of group */
    hid_t	hDatasetID;		/* identifier of dataset */
    hsize_t     nbObjs=0;		/* number of objects in a group */
    int         nbAttrs=0;		/* number of attributes in object */
    int		idx;
    int         n_dims;
    H5G_stat_t  oStatbuf;
    hsize_t     *dims=NULL;
    hsize_t     *maxdims=NULL;
    hid_t       datatype;
    hid_t       dataspace;
    hid_t       native;
    herr_t status;

    char *CreatePath( HDF5GroupObjects *poH5Object );

    HDF5GroupObjects *poHchild;
    HDF5GroupObjects *poHparent;

    poHparent = ( HDF5GroupObjects * ) poHObjParent;
    poHchild=poHparent->poHchild;

    if( H5Gget_objinfo( hHDF5, pszObjName, FALSE, &oStatbuf ) < 0  )
	return -1;

    
/* -------------------------------------------------------------------- */
/*      Look for next child                                             */
/* -------------------------------------------------------------------- */
    for( idx=0; idx < poHparent->nbObjs; idx++ )	{
	if( poHchild->pszName == NULL ) break;
	poHchild++;
    }

    if( idx == poHparent->nbObjs ) 
	return -1;  // all children parsed
    
/* -------------------------------------------------------------------- */
/*      Save child information                                          */
/* -------------------------------------------------------------------- */
    poHchild->pszName  = CPLStrdup( pszObjName );
    
    poHchild->nType  = oStatbuf.type;
    poHchild->nIndex = idx;
    poHchild->poHparent = poHparent;
    poHchild->nRank     = 0;
    poHchild->paDims    = 0;
    poHchild->HDatatype = 0;
    poHchild->objno[0]  = oStatbuf.objno[0];
    poHchild->objno[1]  = oStatbuf.objno[1];
    if( poHchild->pszPath == NULL ) {
	poHchild->pszPath  = CreatePath( poHchild );
    }
    if( poHparent->pszPath == NULL ) {
	poHparent->pszPath = CreatePath( poHparent );
    }


    switch ( oStatbuf.type ) 
	{
	case H5G_LINK:
	    poHchild->nbAttrs = 0;
	    poHchild->nbObjs = 0;
	    poHchild->poHchild = NULL;
	    poHchild->nRank      = 0;
	    poHchild->paDims    = 0;
	    poHchild->HDatatype = 0;
	    break;
	    
	case H5G_GROUP:
	    if( ( hGroupID = H5Gopen( hHDF5, pszObjName ) ) == -1  ) {
		printf( "Error: unable to access \"%s\" group.\n", 
			pszObjName );
		return -1;
	    }
	    nbAttrs          = H5Aget_num_attrs( hGroupID );
	    ret              = H5Gget_num_objs( hGroupID, &nbObjs );
	    poHchild->nbAttrs= nbAttrs;
	    poHchild->nbObjs = (int) nbObjs;
	    poHchild->nRank      = 0;
	    poHchild->paDims    = 0;
	    poHchild->HDatatype = 0;
	    
	    if( nbObjs > 0 ) {
		poHchild->poHchild =( HDF5GroupObjects * )
		    CPLCalloc( (int)nbObjs, sizeof( HDF5GroupObjects ) );
		memset( poHchild->poHchild,0,
			(size_t) (sizeof( HDF5GroupObjects ) * nbObjs) );
	    }
	    else 
		poHchild->poHchild = NULL;

            if( !HDF5GroupCheckDuplicate( poHparent, oStatbuf.objno ) )
                H5Giterate( hHDF5, pszObjName, NULL, 
                            HDF5CreateGroupObjs,  (void*) poHchild );
            else
                CPLDebug( "HDF5", "avoiding link looping on node '%s'.", 
                          pszObjName );
	    H5Gclose( hGroupID );
	    break;
	    
	case H5G_DATASET:
	    
	    if( ( hDatasetID = H5Dopen( hHDF5, pszObjName ) ) == -1  ) {
		printf( "Error: unable to access \"%s\" dataset.\n", 
		       pszObjName );
		return -1;
	    }
	    nbAttrs      = H5Aget_num_attrs( hDatasetID );
	    datatype     = H5Dget_type( hDatasetID );
	    dataspace    = H5Dget_space( hDatasetID );
	    n_dims       = H5Sget_simple_extent_ndims( dataspace );
	    native       = H5Tget_native_type( datatype, H5T_DIR_ASCEND );
	    
	    if( n_dims > 0 ) {
		dims     = (hsize_t *) CPLCalloc( n_dims,sizeof( hsize_t ) );
		maxdims  = (hsize_t *) CPLCalloc( n_dims,sizeof( hsize_t ) );
	    }
	    status     = H5Sget_simple_extent_dims( dataspace, dims, maxdims );
	    if( maxdims != NULL )
		CPLFree( maxdims );
	    
	    if( n_dims > 0 ) {
		poHchild->nRank     = n_dims;   // rank of the array
		poHchild->paDims    = dims;      // dimmension of the array.
		poHchild->HDatatype = datatype;  // HDF5 datatype
	    }
	    else  {
		poHchild->nRank     = -1;
		poHchild->paDims    = NULL;
		poHchild->HDatatype = 0;
	}
	    poHchild->nbAttrs   = nbAttrs;
	    poHchild->nbObjs    = 0;
	    poHchild->poHchild  = NULL;
	    poHchild->native    = native;
	    ret                 = H5Dclose( hDatasetID );
	    break;
	    
	case H5G_TYPE:
	    poHchild->nbAttrs = 0;
	    poHchild->nbObjs = 0;
	    poHchild->poHchild = NULL;
	    poHchild->nRank      = 0;
	    poHchild->paDims    = 0;
	    poHchild->HDatatype = 0;
	    break;
	    
	default:
	    break;
	}
    
    return 0;
}
コード例 #20
0
ファイル: rwHDF5.cpp プロジェクト: I2PC/scipion
int ImageBase::readHDF5(size_t select_img)
{
    bool isStack = false;

    H5infoProvider provider = getProvider(fhdf5); // Provider name

    int errCode = 0;

    hid_t dataset;    /* Dataset and datatype identifiers */
    hid_t filespace;
    hsize_t dims[4]; // We are not going to support more than 4 dimensions, at this moment.
    hsize_t nobjEman;
    hid_t cparms;
    int rank;

    String dsname = filename.getBlockName();
    
    // Setting default dataset name
    if (dsname.empty())
    {
        dsname = provider.second;

        switch (provider.first)
        {
        case EMAN: // Images in stack are stored in separated groups
            hid_t grpid;
            grpid = H5Gopen(fhdf5,"/MDF/images/", H5P_DEFAULT);
            /*herr_t err = */
            H5Gget_num_objs(grpid, &nobjEman);
            dsname = formatString(dsname.c_str(), IMG_INDEX(select_img));
            H5Gclose(grpid);
            break;
        default:
        	break;
        }
    }
    else
    {
        switch (provider.first)
        {
        case EMAN: // Images in stack are stored in separated groups
            nobjEman=1;
            break;
        default:
            break;
        }
    }

    dataset = H5Dopen2(fhdf5, dsname.c_str(), H5P_DEFAULT);

    if( dataset < 0)
        REPORT_ERROR(ERR_IO_NOTEXIST, formatString("readHDF5: Dataset '%s' not found",dsname.c_str()));

    cparms = H5Dget_create_plist(dataset); /* Get properties handle first. */

    // Get dataset rank and dimension.
    filespace = H5Dget_space(dataset);    /* Get filespace handle first. */
    //    rank      = H5Sget_simple_extent_ndims(filespace);
    rank  = H5Sget_simple_extent_dims(filespace, dims, NULL);

    // Offset only set when it is possible to access to data directly
    offset = (H5D_CONTIGUOUS == H5Pget_layout(cparms))? H5Dget_offset(dataset) : 0;


    //    status = H5Dread(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, bm_out);

    hid_t h5datatype = H5Dget_type(dataset);

    // Reading byte order
    switch(H5Tget_order(h5datatype))
    {
    case H5T_ORDER_ERROR:
        REPORT_ERROR(ERR_IO, "readHDF5: error reading endianness.");
        break;
    case H5T_ORDER_LE:
        swap = IsBigEndian();
        break;
    case H5T_ORDER_BE:
        swap = IsLittleEndian();
        break;
    default:
        REPORT_ERROR(ERR_IO, "readHDF5: unknown endianness type, maybe mixed types.");
        break;
    }

    DataType datatype = datatypeH5(h5datatype);
    MDMainHeader.setValue(MDL_DATATYPE,(int) datatype);

    // Setting isStack depending on provider
    switch (provider.first)
    {
    case MISTRAL: // rank 3 arrays are stacks
        isStack = true;
        break;
        //    case EMAN: // Images in stack are stored in separated groups
    default:
    	break;
    }


    ArrayDim aDim;
    size_t nDimFile;
    aDim.xdim = dims[rank-1];
    aDim.ydim = (rank>1)?dims[rank-2]:1;
    aDim.zdim = (rank>3 || (rank==3 && !isStack))?dims[rank-3]:1;
    if ( provider.first == EMAN )
        nDimFile = nobjEman;
    else
        nDimFile = ( rank<3 || !isStack )?1:dims[0] ;

    if (select_img > nDimFile)
        REPORT_ERROR(ERR_INDEX_OUTOFBOUNDS, formatString("readHDF5 (%s): Image number %lu exceeds stack size %lu", filename.c_str(), select_img, nDimFile));

    aDim.ndim = replaceNsize = (select_img == ALL_IMAGES)? nDimFile :1 ;
    setDimensions(aDim);

    //Read header only
    if(dataMode == HEADER || (dataMode == _HEADER_ALL && aDim.ndim > 1))
        return errCode;


    // EMAN stores each image in a separate dataset
    if ( provider.first == EMAN )
        select_img = 1;

    size_t   imgStart = IMG_INDEX(select_img);
    size_t   imgEnd = (select_img != ALL_IMAGES) ? imgStart + 1 : aDim.ndim;



    MD.clear();
    MD.resize(imgEnd - imgStart,MDL::emptyHeader);

    if (dataMode < DATA)   // Don't read  data if not necessary but read the header
        return errCode;

    if ( H5Pget_layout(cparms) == H5D_CONTIGUOUS ) //We can read it directly
        readData(fimg, select_img, datatype, 0);
    else // We read it by hyperslabs
    {
        // Allocate memory for image data (Assume xdim, ydim, zdim and ndim are already set
        //if memory already allocated use it (no resize allowed)
        mdaBase->coreAllocateReuse();

        hid_t       memspace;

        hsize_t offset[4]; // Hyperslab offset in the file
        hsize_t  count[4]; // Size of the hyperslab in the file

        // Define the offset and count of the hyperslab to be read.

        switch (rank)
        {
        case 4:
            count[0] = 1;
        case 3:
            //            if (stack)
            count[rank-3] = aDim.zdim;
            offset[rank-2]  = 0;
        case 2:
            count[rank-2]  = aDim.ydim;
            offset[rank-2]  = 0;
            break;
        }
        count[rank-1]  = aDim.xdim;
        offset[rank-1]  = 0;

        aDim.xdim = dims[rank-1];
        aDim.ydim = (rank>1)?dims[rank-2]:1;
        aDim.zdim = (rank == 4)?dims[1]:1;
        // size_t nDimFile = (rank>2)?dims[0]:1 ;

        // Define the memory space to read a hyperslab.
        memspace = H5Screate_simple(rank,count,NULL);

        size_t data = (size_t) this->mdaBase->getArrayPointer();
        size_t pad = aDim.zyxdim*gettypesize(myT());


        for (size_t idx = imgStart, imN = 0; idx < imgEnd; ++idx, ++imN)
        {

            // Set the offset of the hyperslab to be read
            offset[0] = idx;

            if ( H5Sselect_hyperslab(filespace, H5S_SELECT_SET, offset, NULL,
                                     count, NULL) < 0 )
                REPORT_ERROR(ERR_IO_NOREAD, formatString("readHDF5: Error selecting hyperslab %d from filename %s",
                             imgStart, filename.c_str()));

            //            movePointerTo(ALL_SLICES,imN);
            // Read
            if ( H5Dread(dataset, H5Datatype(myT()), memspace, filespace,
                         H5P_DEFAULT, (void*)(data + pad*imN)) < 0 )
                REPORT_ERROR(ERR_IO_NOREAD,formatString("readHDF5: Error reading hyperslab %d from filename %s",
                                                        imgStart, filename.c_str()));
        }
        H5Sclose(memspace);
    }

    H5Pclose(cparms);
    H5Sclose(filespace);
    H5Dclose(dataset);

    return errCode;
}
コード例 #21
0
hsize_t H5G::getGroupCount(){
        hsize_t i;
        H5Gget_num_objs(classID,&i);
        return i;
}
コード例 #22
0
int
main()
{
   printf("\n*** Checking HDF5 dimscales some more.\n");
   printf("*** Creating a file with one var with one dimension scale...");
   
   {
      hid_t fileid, spaceid, datasetid, dimscaleid, cparmsid;
      hsize_t dims[NDIMS] = {DIM1_LEN}, maxdims[NDIMS] = {H5S_UNLIMITED};

      /* Create file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
			      H5P_DEFAULT)) < 0) ERR;

      /* Create the space that will be used both for the dimscale and
       * the 1D dataset that will attach it. */
      if ((spaceid = H5Screate_simple(NDIMS, dims, maxdims)) < 0) ERR;

      /* Modify dataset creation properties, i.e. enable chunking. */
      dims[0] = 1;
      if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      if (H5Pset_chunk(cparmsid, NDIMS, dims) < 0) ERR;

      /* Create our dimension scale, as an unlimited dataset. */
      if ((dimscaleid = H5Dcreate(fileid, DIMSCALE_NAME, H5T_NATIVE_INT,
				  spaceid, cparmsid)) < 0) ERR;
      if (H5DSset_scale(dimscaleid, NAME_ATTRIBUTE) < 0) ERR;

      /* Create a variable which uses it. */
      if ((datasetid = H5Dcreate(fileid, VAR1_NAME, H5T_NATIVE_INT,
				 spaceid, cparmsid)) < 0) ERR;
      if (H5DSattach_scale(datasetid, dimscaleid, 0) < 0) ERR;
      if (H5DSset_label(datasetid, 0, DIMSCALE_LABEL) < 0) ERR;

      /* Fold up our tents. */
      if (H5Dclose(dimscaleid) < 0 ||
	  H5Dclose(datasetid) < 0 ||
	  H5Sclose(spaceid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Checking that one var, one dimscale file can be read...");

   {
      hid_t fileid, spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[NC_MAX_NAME + 1];
      char dimscale_name[NC_MAX_NAME+1];
      htri_t is_scale;
      char label[NC_MAX_NAME+1];
      int num_scales;
      hsize_t dims[1], maxdims[1];
      H5G_stat_t statbuf;
      HDF5_OBJID_T dimscale_obj, vars_dimscale_obj;

      /* Open the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      
      /* Loop through objects in the root group. */
      if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(fileid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(fileid, i, obj_name, NC_MAX_NAME) < 0) ERR;

	 /*printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n",
	   obj_class, obj_name);*/

	 /* Deal with object based on its obj_class. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen1(fileid, obj_name)) < 0) ERR;

	       /* This should be an unlimited dataset. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if (maxdims[0] != H5S_UNLIMITED) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale && strcmp(obj_name, DIMSCALE_NAME)) ERR;
	       if (is_scale)
	       {
		  /* A dimscale comes with a NAME attribute, in
		   * addition to its real name. */
		  if (H5DSget_scale_name(datasetid, dimscale_name, NC_MAX_NAME) < 0) ERR;
		  if (strcmp(dimscale_name, NAME_ATTRIBUTE)) ERR;

		  /* fileno and objno uniquely identify an object and a
		   * HDF5 file. */
		  if (H5Gget_objinfo(datasetid, ".", 1, &statbuf) < 0) ERR;
		  dimscale_obj.fileno[0] = statbuf.fileno[0];
		  dimscale_obj.objno[0] = statbuf.objno[0];
		  dimscale_obj.fileno[1] = statbuf.fileno[1];
		  dimscale_obj.objno[1] = statbuf.objno[1];
		  /*printf("statbuf.fileno = %d statbuf.objno = %d\n",
		    statbuf.fileno, statbuf.objno);*/

	       }
	       else
	       {
		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  if (H5DSiterate_scales(datasetid, 0, NULL, alien_visitor,
					 &vars_dimscale_obj) < 0) ERR;
		  /*printf("vars_dimscale_obj.fileno = %d vars_dimscale_obj.objno = %d\n",
		    vars_dimscale_obj.fileno, vars_dimscale_obj.objno);*/
		  if (vars_dimscale_obj.fileno[0] != dimscale_obj.fileno[0] ||
		      vars_dimscale_obj.objno[0] != dimscale_obj.objno[0] ||
		      vars_dimscale_obj.fileno[1] != dimscale_obj.fileno[1] ||
		      vars_dimscale_obj.objno[1] != dimscale_obj.objno[1]) ERR;
		  
		  /* There's also a label for dimension 0. */
		  if (H5DSget_label(datasetid, 0, label, NC_MAX_NAME) < 0) ERR;

		  /*printf("found non-scale dataset %s, label %s\n", obj_name, label);*/
	       }
	       if (H5Dclose(datasetid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Sclose(spaceid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Creating a file with one var with two dimension scales...");
   
   {
#define LAT_LEN 3
#define LON_LEN 2
#define DIMS_2 2
#define LAT_NAME "lat"
#define LON_NAME "lon"
#define PRES_NAME "pres"
      
      hid_t fileid, lat_spaceid, lon_spaceid, pres_spaceid;
      hid_t pres_datasetid, lat_dimscaleid, lon_dimscaleid;
      hsize_t dims[DIMS_2];

      /* Create file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
			      H5P_DEFAULT)) < 0) ERR;

      /* Create the spaces that will be used for the dimscales. */
      dims[0] = LAT_LEN;
      if ((lat_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = LON_LEN;
      if ((lon_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;

      /* Create the space for the dataset. */
      dims[0] = LAT_LEN;
      dims[1] = LON_LEN;
      if ((pres_spaceid = H5Screate_simple(DIMS_2, dims, dims)) < 0) ERR;

      /* Create our dimension scales. */
      if ((lat_dimscaleid = H5Dcreate(fileid, LAT_NAME, H5T_NATIVE_INT,
				      lat_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lat_dimscaleid, NULL) < 0) ERR;
      if ((lon_dimscaleid = H5Dcreate(fileid, LON_NAME, H5T_NATIVE_INT,
				      lon_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lon_dimscaleid, NULL) < 0) ERR;

      /* Create a variable which uses these two dimscales. */
      if ((pres_datasetid = H5Dcreate(fileid, PRES_NAME, H5T_NATIVE_FLOAT,
				      pres_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lat_dimscaleid, 0) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lon_dimscaleid, 1) < 0) ERR;

      /* Fold up our tents. */
      if (H5Dclose(lat_dimscaleid) < 0 ||
	  H5Dclose(lon_dimscaleid) < 0 ||
	  H5Dclose(pres_datasetid) < 0 ||
	  H5Sclose(lat_spaceid) < 0 ||
	  H5Sclose(lon_spaceid) < 0 ||
	  H5Sclose(pres_spaceid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Checking that one var, two dimscales file can be read...");

   {
#define NDIMS2 2
      hid_t fileid, spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[NC_MAX_NAME + 1];
      htri_t is_scale;
      int num_scales;
      hsize_t dims[NDIMS2], maxdims[NDIMS2];
      H5G_stat_t statbuf;
      HDF5_OBJID_T dimscale_obj[2], vars_dimscale_obj[2];
      int dimscale_cnt = 0;
      int d, ndims;

      /* Open the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      
      /* Loop through objects in the root group. */
      if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(fileid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(fileid, i, obj_name, NC_MAX_NAME) < 0) ERR;

/* 	 printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", */
/* 		obj_class, obj_name); */

	 /* Deal with object based on its obj_class. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen1(fileid, obj_name)) < 0) ERR;

	       /* Get space info. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if ((ndims = H5Sget_simple_extent_ndims(spaceid)) < 0) ERR;
	       if (ndims > NDIMS2) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale)
	       {
		  /* fileno and objno uniquely identify an object and a
		   * HDF5 file. */
		  if (H5Gget_objinfo(datasetid, ".", 1, &statbuf) < 0) ERR;
		  dimscale_obj[dimscale_cnt].fileno[0] = statbuf.fileno[0];
		  dimscale_obj[dimscale_cnt].objno[0] = statbuf.objno[0];
		  dimscale_obj[dimscale_cnt].fileno[1] = statbuf.fileno[1];
		  dimscale_obj[dimscale_cnt].objno[1] = statbuf.objno[1];
/* 		  printf("dimscale_obj[%d].fileno = %d dimscale_obj[%d].objno = %d\n", */
/* 			 dimscale_cnt, dimscale_obj[dimscale_cnt].fileno, dimscale_cnt,  */
/* 			 dimscale_obj[dimscale_cnt].objno); */
		  dimscale_cnt++;
	       }
	       else
	       {
		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0 and 1. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;
		  if ((num_scales = H5DSget_num_scales(datasetid, 1)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  for (d = 0; d < ndims; d++)
		  {
		     if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor2,
		     &(vars_dimscale_obj[d])) < 0) ERR;

		     /* Verify that the object ids passed from the
		      * alien_visitor2 function match the ones we found
		      * for the lat and lon datasets. */
		     if (vars_dimscale_obj[d].fileno[0] != dimscale_obj[d].fileno[0] ||
		     vars_dimscale_obj[d].objno[0] != dimscale_obj[d].objno[0]) ERR;
		     if (vars_dimscale_obj[d].fileno[1] != dimscale_obj[d].fileno[1] ||
		     vars_dimscale_obj[d].objno[1] != dimscale_obj[d].objno[1]) ERR;
		  }
	       }
	       if (H5Dclose(datasetid) < 0) ERR;
	       if (H5Sclose(spaceid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Fclose(fileid) < 0) ERR;
   }
   SUMMARIZE_ERR;
   printf("*** Creating a file with one var with two unlimited dimension scales...");
   {
#define U1_LEN 3
#define U2_LEN 2
#define DIMS2 2
#define U1_NAME "u1"
#define U2_NAME "u2"
#define VNAME "v1"
      
      hid_t fapl_id, fcpl_id, grpid, plistid, plistid2;
      hid_t fileid, lat_spaceid, lon_spaceid, pres_spaceid;
      hid_t pres_datasetid, lat_dimscaleid, lon_dimscaleid;
      hsize_t dims[DIMS2], maxdims[DIMS2], chunksize[DIMS2] = {10, 10};
      hid_t spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[NC_MAX_NAME + 1];
      htri_t is_scale;
      int num_scales;
      H5G_stat_t statbuf;
      HDF5_OBJID_T dimscale_obj[2], vars_dimscale_obj[2];
      int dimscale_cnt = 0;
      int d, ndims;

      /* Create file access and create property lists. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      
      /* Set latest_format in access propertly list. This ensures that
       * the latest, greatest, HDF5 versions are used in the file. */
      if (H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0) ERR;

      /* Set H5P_CRT_ORDER_TRACKED in the creation property list. This
       * turns on HDF5 creation ordering in the file. */
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;

      /* Create file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;

      /* Open the root group. */
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;

      /* Create the spaces that will be used for the dimscales. */
      dims[0] = 0;
      maxdims[0] = H5S_UNLIMITED;
      if ((lat_spaceid = H5Screate_simple(1, dims, maxdims)) < 0) ERR;
      if ((lon_spaceid = H5Screate_simple(1, dims, maxdims)) < 0) ERR;

      /* Create the space for the dataset. */
      dims[0] = 0;
      dims[1] = 0;
      maxdims[0] = H5S_UNLIMITED;
      maxdims[1] = H5S_UNLIMITED;
      if ((pres_spaceid = H5Screate_simple(DIMS2, dims, maxdims)) < 0) ERR;

      /* Set up the dataset creation property list for the two dimensions. */
      if ((plistid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      if (H5Pset_chunk(plistid, 1, chunksize) < 0) ERR;
      if (H5Pset_attr_creation_order(plistid, H5P_CRT_ORDER_TRACKED|
				     H5P_CRT_ORDER_INDEXED) < 0) ERR;

      /* Create our dimension scales. */
      if ((lat_dimscaleid = H5Dcreate(grpid, U1_NAME, H5T_NATIVE_INT,
				      lat_spaceid, plistid)) < 0) ERR;
      if (H5DSset_scale(lat_dimscaleid, NULL) < 0) ERR;
      if ((lon_dimscaleid = H5Dcreate(grpid, U2_NAME, H5T_NATIVE_INT,
				      lon_spaceid, plistid)) < 0) ERR;
      if (H5DSset_scale(lon_dimscaleid, NULL) < 0) ERR;

      /* Set up the dataset creation property list for the variable. */
      if ((plistid2 = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
      if (H5Pset_chunk(plistid2, DIMS2, chunksize) < 0) ERR;
      if (H5Pset_attr_creation_order(plistid2, H5P_CRT_ORDER_TRACKED|
				     H5P_CRT_ORDER_INDEXED) < 0) ERR;

      /* Create a variable which uses these two dimscales. */
      if ((pres_datasetid = H5Dcreate(grpid, VNAME, H5T_NATIVE_DOUBLE, pres_spaceid,
				      plistid2)) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lat_dimscaleid, 0) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lon_dimscaleid, 1) < 0) ERR;

      /* Close down the show. */
      if (H5Pclose(fapl_id) < 0 ||
	  H5Pclose(fcpl_id) < 0 ||
	  H5Dclose(lat_dimscaleid) < 0 ||
	  H5Dclose(lon_dimscaleid) < 0 ||
	  H5Dclose(pres_datasetid) < 0 ||
	  H5Sclose(lat_spaceid) < 0 ||
	  H5Sclose(lon_spaceid) < 0 ||
	  H5Sclose(pres_spaceid) < 0 ||
	  H5Pclose(plistid) < 0 ||
	  H5Pclose(plistid2) < 0 ||
	  H5Gclose(grpid) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Open the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      if ((grpid = H5Gopen2(fileid, "/", H5P_DEFAULT)) < 0) ERR;
      
      /* Loop through objects in the root group. */
      if (H5Gget_num_objs(grpid, &num_obj) < 0) ERR;

      for (i = 0; i < num_obj; i++)
      {
	 /*Get the type (i.e. group, dataset, etc.), and the name of
	   the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(grpid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(grpid, i, obj_name, NC_MAX_NAME) < 0) ERR;

	 /* Deal with object based on its obj_class. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen1(grpid, obj_name)) < 0) ERR;

	       /* Get space info. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if ((ndims = H5Sget_simple_extent_ndims(spaceid)) < 0) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale)
	       {
		  /* fileno and objno uniquely identify an object and a
		   * HDF5 file. */
		  if (H5Gget_objinfo(datasetid, ".", 1, &statbuf) < 0) ERR;
		  dimscale_obj[dimscale_cnt].fileno[0] = statbuf.fileno[0];
		  dimscale_obj[dimscale_cnt].objno[0] = statbuf.objno[0];
		  dimscale_obj[dimscale_cnt].fileno[1] = statbuf.fileno[1];
		  dimscale_obj[dimscale_cnt].objno[1] = statbuf.objno[1];
		  dimscale_cnt++;
	       }
	       else
	       {
		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0 and 1. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;
		  if ((num_scales = H5DSget_num_scales(datasetid, 1)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  for (d = 0; d < ndims; d++)
		  {
		     if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor2,
					    &(vars_dimscale_obj[d])) < 0) ERR;

		     /* Verify that the object ids passed from the
		      * alien_visitor2 function match the ones we found
		      * for the lat and lon datasets. */
		     if (vars_dimscale_obj[d].fileno[0] != dimscale_obj[d].fileno[0] ||
			 vars_dimscale_obj[d].objno[0] != dimscale_obj[d].objno[0]) ERR;
		     if (vars_dimscale_obj[d].fileno[1] != dimscale_obj[d].fileno[1] ||
			 vars_dimscale_obj[d].objno[1] != dimscale_obj[d].objno[1]) ERR;
		  }

	       }

	       if (H5Dclose(datasetid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
     }

      /* Check the dimension lengths. */
      {
	 hid_t spaceid1;
	 hsize_t h5dimlen[DIMS2], h5dimlenmax[DIMS2];
	 int dataset_ndims;

	 /* Check U1. */
	 if ((datasetid = H5Dopen1(grpid, U1_NAME)) < 0) ERR;
	 if ((spaceid1 = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(spaceid1, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 1 || h5dimlen[0] != 0 || h5dimlenmax[0] != H5S_UNLIMITED) ERR;
	 if (H5Dclose(datasetid) ||
	     H5Sclose(spaceid1)) ERR;

	 /* Check U2. */
	 if ((datasetid = H5Dopen1(grpid, U2_NAME)) < 0) ERR;
	 if ((spaceid1 = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(spaceid1, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 1 || h5dimlen[0] != 0 || h5dimlenmax[0] != H5S_UNLIMITED) ERR;
	 if (H5Dclose(datasetid) ||
	     H5Sclose(spaceid1)) ERR;
	 
	 /* Check V1. */
	 if ((datasetid = H5Dopen1(grpid, VNAME)) < 0) ERR;
	 if ((spaceid1 = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(spaceid1, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 2 || h5dimlen[0] != 0 || h5dimlen[1] != 0 ||
	     h5dimlenmax[0] != H5S_UNLIMITED || h5dimlenmax[1] != H5S_UNLIMITED) ERR;

	 /* All done. */
	 if (H5Dclose(datasetid) ||
	     H5Sclose(spaceid1)) ERR;
      }

      /* Write two hyperslabs. */
      {
#define NUM_VALS 3
	 hid_t file_spaceid, mem_spaceid;
	 hsize_t h5dimlen[DIMS2], h5dimlenmax[DIMS2], xtend_size[DIMS2] = {1, NUM_VALS};
	 hsize_t start[DIMS2] = {0, 0};
	 hsize_t count[DIMS2] = {1, NUM_VALS};
	 double value[NUM_VALS];
	 int dataset_ndims;
	 int i;

	 /* Set up phony data. */
	 for (i = 0; i < NUM_VALS; i++)
	    value[i] = (float)i;

	 /* Open the dataset, check its dimlens. */
	 if ((datasetid = H5Dopen1(grpid, VNAME)) < 0) ERR;
	 if ((file_spaceid = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(file_spaceid, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 2 || h5dimlen[0] != 0 || h5dimlen[1] != 0 ||
	     h5dimlenmax[0] != H5S_UNLIMITED || h5dimlenmax[1] != H5S_UNLIMITED) ERR;

	 /* Extend the size of the dataset. */
	 if (H5Dextend(datasetid, xtend_size) < 0) ERR;
	 if ((file_spaceid = H5Dget_space(datasetid)) < 0) ERR;

	 /* Check the size. */
	 if ((dataset_ndims = H5Sget_simple_extent_dims(file_spaceid, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 2 || h5dimlen[0] != 1 || h5dimlen[1] != NUM_VALS ||
	     h5dimlenmax[0] != H5S_UNLIMITED || h5dimlenmax[1] != H5S_UNLIMITED) ERR;

	 /* Set up the file and memory spaces. */
	 if (H5Sselect_hyperslab(file_spaceid, H5S_SELECT_SET,
				 start, NULL, count, NULL) < 0) ERR;
	 if ((mem_spaceid = H5Screate_simple(DIMS2, count, NULL)) < 0) ERR;

	 /* Write a slice of data. */
	 if (H5Dwrite(datasetid, H5T_NATIVE_DOUBLE, mem_spaceid, file_spaceid,
		      H5P_DEFAULT, value) < 0)

	 /* Check the size. */
	 if ((file_spaceid = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(file_spaceid, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 2 || h5dimlen[0] != 1 || h5dimlen[1] != NUM_VALS ||
	     h5dimlenmax[0] != H5S_UNLIMITED || h5dimlenmax[1] != H5S_UNLIMITED) ERR;

	 /* Extend the size of the dataset for the second slice. */
	 xtend_size[0]++;
	 if (H5Dextend(datasetid, xtend_size) < 0) ERR;
	 if ((file_spaceid = H5Dget_space(datasetid)) < 0) ERR;

	 /* Set up the file and memory spaces for a second slice. */
	 start[0]++;
	 if (H5Sselect_hyperslab(file_spaceid, H5S_SELECT_SET,
				 start, NULL, count, NULL) < 0) ERR;
	 if ((mem_spaceid = H5Screate_simple(DIMS2, count, NULL)) < 0) ERR;

	 /* Write a second slice of data. */
	 if (H5Dwrite(datasetid, H5T_NATIVE_DOUBLE, mem_spaceid, file_spaceid,
		      H5P_DEFAULT, value) < 0)

	 /* Check the size again. */
	 if ((file_spaceid = H5Dget_space(datasetid)) < 0) ERR;
	 if ((dataset_ndims = H5Sget_simple_extent_dims(file_spaceid, h5dimlen,
							h5dimlenmax)) < 0) ERR;
	 if (dataset_ndims != 2 || h5dimlen[0] != 2 || h5dimlen[1] != NUM_VALS ||
	     h5dimlenmax[0] != H5S_UNLIMITED || h5dimlenmax[1] != H5S_UNLIMITED) ERR;

	 /* All done. */
	 if (H5Dclose(datasetid) ||
	     H5Sclose(mem_spaceid) ||
	     H5Sclose(file_spaceid)) ERR;
      }

      /* Close up the shop. */
      if (H5Sclose(spaceid)) ERR;
      if (H5Gclose(grpid) < 0 ||
      H5Fclose(fileid) < 0) ERR;
   }
   SUMMARIZE_ERR;
   printf("*** Checking dimension scales with attached dimension scales...");
   
   {
#define LAT_LEN 3
#define LON_LEN 2
#define TIME_LEN 5
#define LEN_LEN 10
#define DIMS_3 3
#define NUM_DIMSCALES1 4
#define LAT_NAME "lat"
#define LON_NAME "lon"
#define PRES_NAME1 "z_pres"
#define TIME_NAME "time"
#define LEN_NAME "u_len"
      
      hid_t fileid, lat_spaceid, lon_spaceid, time_spaceid, pres_spaceid, len_spaceid;
      hid_t pres_datasetid, lat_dimscaleid, lon_dimscaleid, time_dimscaleid, len_dimscaleid;
      hid_t fapl_id, fcpl_id;
      hsize_t dims[DIMS_3];
      hid_t spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[NC_MAX_NAME + 1];
      htri_t is_scale;
      int num_scales;
      hsize_t maxdims[DIMS_3];
      H5G_stat_t statbuf;
      HDF5_OBJID_T dimscale_obj[NUM_DIMSCALES1], vars_dimscale_obj[NUM_DIMSCALES1];
      int dimscale_cnt = 0;
      int d, ndims;

      /* Create file access and create property lists. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      
      /* Set latest_format in access propertly list. This ensures that
       * the latest, greatest, HDF5 versions are used in the file. */
      if (H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0) ERR;

      /* Set H5P_CRT_ORDER_TRACKED in the creation property list. This
       * turns on HDF5 creation ordering in the file. */
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;

      /* Create file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;

      /* Create the spaces that will be used for the dimscales. */
      dims[0] = LAT_LEN;
      if ((lat_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = LON_LEN;
      if ((lon_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = TIME_LEN;
      if ((time_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = LEN_LEN;
      if ((len_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;

      /* Create the space for the dataset. */
      dims[0] = LAT_LEN;
      dims[1] = LON_LEN;
      dims[2] = TIME_LEN;
      if ((pres_spaceid = H5Screate_simple(DIMS_3, dims, dims)) < 0) ERR;

      /* Create our dimension scales. */
      if ((lat_dimscaleid = H5Dcreate1(fileid, LAT_NAME, H5T_NATIVE_INT,
				      lat_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lat_dimscaleid, NULL) < 0) ERR;
      if ((lon_dimscaleid = H5Dcreate1(fileid, LON_NAME, H5T_NATIVE_INT,
				      lon_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lon_dimscaleid, NULL) < 0) ERR;
      if ((time_dimscaleid = H5Dcreate1(fileid, TIME_NAME, H5T_NATIVE_INT,
				      time_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(time_dimscaleid, NULL) < 0) ERR;
      if ((len_dimscaleid = H5Dcreate1(fileid, LEN_NAME, H5T_NATIVE_INT,
				      len_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(len_dimscaleid, NULL) < 0) ERR;

      /* Create a variable which uses these three dimscales. */
      if ((pres_datasetid = H5Dcreate1(fileid, PRES_NAME1, H5T_NATIVE_FLOAT,
				      pres_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lat_dimscaleid, 0) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lon_dimscaleid, 1) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, time_dimscaleid, 2) < 0) ERR;

      /* Attach a dimscale to a dimscale. Unfortunately, HDF5 does not
       * allow this. Woe is me. */
      /*if (H5DSattach_scale(time_dimscaleid, len_dimscaleid, 0) < 0) ERR;*/

      /* Fold up our tents. */
      if (H5Dclose(lat_dimscaleid) < 0 ||
	  H5Dclose(lon_dimscaleid) < 0 ||
	  H5Dclose(time_dimscaleid) < 0 ||
	  H5Dclose(len_dimscaleid) < 0 ||
	  H5Dclose(pres_datasetid) < 0 ||
	  H5Sclose(lat_spaceid) < 0 ||
	  H5Sclose(lon_spaceid) < 0 ||
	  H5Sclose(time_spaceid) < 0 ||
	  H5Sclose(pres_spaceid) < 0 ||
	  H5Sclose(len_spaceid) < 0 ||
	  H5Pclose(fapl_id) < 0 ||
	  H5Pclose(fcpl_id) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Open the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      
      /* Loop through objects in the root group. */
      if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(fileid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(fileid, i, obj_name, NC_MAX_NAME) < 0) ERR;

 	 /* printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n",  */
/*  		obj_class, obj_name);  */

	 /* Deal with object based on its obj_class. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen1(fileid, obj_name)) < 0) ERR;

	       /* Get space info. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if ((ndims = H5Sget_simple_extent_ndims(spaceid)) < 0) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale)
	       {
		  /* fileno and objno uniquely identify an object and a
		   * HDF5 file. */
		  if (H5Gget_objinfo(datasetid, ".", 1, &statbuf) < 0) ERR;
		  dimscale_obj[dimscale_cnt].fileno[0] = statbuf.fileno[0];
		  dimscale_obj[dimscale_cnt].objno[0] = statbuf.objno[0];
		  dimscale_obj[dimscale_cnt].fileno[1] = statbuf.fileno[1];
		  dimscale_obj[dimscale_cnt].objno[1] = statbuf.objno[1];
		  /* printf("dimscale_obj[%d].fileno = %d dimscale_obj[%d].objno = %d\n", */
/* 			 dimscale_cnt, dimscale_obj[dimscale_cnt].fileno, dimscale_cnt, */
/* 			 dimscale_obj[dimscale_cnt].objno); */
		  dimscale_cnt++;
	       }
	       else
	       {
		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0 and 1. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;
		  if ((num_scales = H5DSget_num_scales(datasetid, 1)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  for (d = 0; d < ndims; d++)
		  {
		     if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor2,
		     &(vars_dimscale_obj[d])) < 0) ERR;

		     /* Verify that the object ids passed from the
		      * alien_visitor2 function match the ones we found
		      * for the lat and lon datasets. */
		     if (vars_dimscale_obj[d].fileno[0] != dimscale_obj[d].fileno[0] ||
		     vars_dimscale_obj[d].objno[0] != dimscale_obj[d].objno[0]) ERR;
		     if (vars_dimscale_obj[d].fileno[1] != dimscale_obj[d].fileno[1] ||
		     vars_dimscale_obj[d].objno[1] != dimscale_obj[d].objno[1]) ERR;
		  }
	       }
	       if (H5Dclose(datasetid) < 0) ERR;
	       if (H5Sclose(spaceid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   printf("*** Checking cration ordering of datasets which are also dimension scales...");
   
   {
#define LAT_LEN 3
#define LON_LEN 2
#define TIME_LEN 5
#define LEN_LEN 10
#define DIMS_3 3
#define NUM_DIMSCALES2 4
#define LAT_NAME "lat"
#define LON_NAME "lon"
#define PRES_NAME1 "z_pres"
#define TIME_NAME "time"
#define LEN_NAME "u_len"
      
      hid_t fileid, lat_spaceid, lon_spaceid, time_spaceid, pres_spaceid, len_spaceid;
      hid_t pres_datasetid, lat_dimscaleid, lon_dimscaleid, time_dimscaleid, len_dimscaleid;
      hid_t fapl_id, fcpl_id;
      hsize_t dims[DIMS_3];
      hid_t spaceid = 0, datasetid = 0;
      hsize_t num_obj, i;
      int obj_class;
      char obj_name[NC_MAX_NAME + 1];
      htri_t is_scale;
      int num_scales;
      hsize_t maxdims[DIMS_3];
      H5G_stat_t statbuf;
      HDF5_OBJID_T dimscale_obj[NUM_DIMSCALES2], vars_dimscale_obj[NUM_DIMSCALES2];
      int dimscale_cnt = 0;
      int d, ndims;

      /* Create file access and create property lists. */
      if ((fapl_id = H5Pcreate(H5P_FILE_ACCESS)) < 0) ERR;
      if ((fcpl_id = H5Pcreate(H5P_FILE_CREATE)) < 0) ERR;
      
      /* Set latest_format in access propertly list. This ensures that
       * the latest, greatest, HDF5 versions are used in the file. */
      if (H5Pset_libver_bounds(fapl_id, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0) ERR;

      /* Set H5P_CRT_ORDER_TRACKED in the creation property list. This
       * turns on HDF5 creation ordering in the file. */
      if (H5Pset_link_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;
      if (H5Pset_attr_creation_order(fcpl_id, (H5P_CRT_ORDER_TRACKED |
					       H5P_CRT_ORDER_INDEXED)) < 0) ERR;

      /* Create file. */
      if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, fcpl_id, fapl_id)) < 0) ERR;

      /* Create the spaces that will be used for the dimscales. */
      dims[0] = LAT_LEN;
      if ((lat_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = LON_LEN;
      if ((lon_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = TIME_LEN;
      if ((time_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
      dims[0] = LEN_LEN;
      if ((len_spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;

      /* Create the space for the dataset. */
      dims[0] = LAT_LEN;
      dims[1] = LON_LEN;
      dims[2] = TIME_LEN;
      if ((pres_spaceid = H5Screate_simple(DIMS_3, dims, dims)) < 0) ERR;

      /* Create our dimension scales. */
      if ((lat_dimscaleid = H5Dcreate1(fileid, LAT_NAME, H5T_NATIVE_INT,
				      lat_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lat_dimscaleid, NULL) < 0) ERR;
      if ((lon_dimscaleid = H5Dcreate1(fileid, LON_NAME, H5T_NATIVE_INT,
				      lon_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(lon_dimscaleid, NULL) < 0) ERR;
      if ((time_dimscaleid = H5Dcreate1(fileid, TIME_NAME, H5T_NATIVE_INT,
				      time_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(time_dimscaleid, NULL) < 0) ERR;
      if ((len_dimscaleid = H5Dcreate1(fileid, LEN_NAME, H5T_NATIVE_INT,
				      len_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSset_scale(len_dimscaleid, NULL) < 0) ERR;

      /* Create a variable which uses these three dimscales. */
      if ((pres_datasetid = H5Dcreate1(fileid, PRES_NAME1, H5T_NATIVE_FLOAT,
				      pres_spaceid, H5P_DEFAULT)) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lat_dimscaleid, 0) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, lon_dimscaleid, 1) < 0) ERR;
      if (H5DSattach_scale(pres_datasetid, time_dimscaleid, 2) < 0) ERR;

      /* Attach a dimscale to a dimscale. Unfortunately, HDF5 does not
       * allow this. Woe is me. */
      /*if (H5DSattach_scale(time_dimscaleid, len_dimscaleid, 0) < 0) ERR;*/

      /* Fold up our tents. */
      if (H5Dclose(lat_dimscaleid) < 0 ||
	  H5Dclose(lon_dimscaleid) < 0 ||
	  H5Dclose(time_dimscaleid) < 0 ||
	  H5Dclose(len_dimscaleid) < 0 ||
	  H5Dclose(pres_datasetid) < 0 ||
	  H5Sclose(lat_spaceid) < 0 ||
	  H5Sclose(lon_spaceid) < 0 ||
	  H5Sclose(time_spaceid) < 0 ||
	  H5Sclose(pres_spaceid) < 0 ||
	  H5Sclose(len_spaceid) < 0 ||
	  H5Pclose(fapl_id) < 0 ||
	  H5Pclose(fcpl_id) < 0 ||
	  H5Fclose(fileid) < 0) ERR;

      /* Open the file. */
      if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
      
      /* Loop through objects in the root group. */
      if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
      for (i=0; i<num_obj; i++)
      {
	 /* Get the type (i.e. group, dataset, etc.), and the name of
	  * the object. */
	 if ((obj_class = H5Gget_objtype_by_idx(fileid, i)) < 0) ERR;
	 if (H5Gget_objname_by_idx(fileid, i, obj_name, NC_MAX_NAME) < 0) ERR;

 	 /* printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n",  */
/*  		obj_class, obj_name);  */

	 /* Deal with object based on its obj_class. */
	 switch(obj_class)
	 {
	    case H5G_GROUP:
	       break;
	    case H5G_DATASET:
	       /* Open the dataset. */
	       if ((datasetid = H5Dopen1(fileid, obj_name)) < 0) ERR;

	       /* Get space info. */
	       if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
	       if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
	       if ((ndims = H5Sget_simple_extent_ndims(spaceid)) < 0) ERR;

	       /* Is this a dimscale? */
	       if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
	       if (is_scale)
	       {
		  /* fileno and objno uniquely identify an object and a
		   * HDF5 file. */
		  if (H5Gget_objinfo(datasetid, ".", 1, &statbuf) < 0) ERR;
		  dimscale_obj[dimscale_cnt].fileno[0] = statbuf.fileno[0];
		  dimscale_obj[dimscale_cnt].objno[0] = statbuf.objno[0];
		  dimscale_obj[dimscale_cnt].fileno[1] = statbuf.fileno[1];
		  dimscale_obj[dimscale_cnt].objno[1] = statbuf.objno[1];
		  /* printf("dimscale_obj[%d].fileno = %d dimscale_obj[%d].objno = %d\n", */
/* 			 dimscale_cnt, dimscale_obj[dimscale_cnt].fileno, dimscale_cnt, */
/* 			 dimscale_obj[dimscale_cnt].objno); */
		  dimscale_cnt++;
	       }
	       else
	       {
		  /* Here's how to get the number of scales attached
		   * to the dataset's dimension 0 and 1. */
		  if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
		  if (num_scales != 1) ERR;
		  if ((num_scales = H5DSget_num_scales(datasetid, 1)) < 0) ERR;
		  if (num_scales != 1) ERR;

		  /* Go through all dimscales for this var and learn about them. */
		  for (d = 0; d < ndims; d++)
		  {
		     if (H5DSiterate_scales(datasetid, d, NULL, alien_visitor2,
		     &(vars_dimscale_obj[d])) < 0) ERR;

		     /* Verify that the object ids passed from the
		      * alien_visitor2 function match the ones we found
		      * for the lat and lon datasets. */
		     if (vars_dimscale_obj[d].fileno[0] != dimscale_obj[d].fileno[0] ||
		     vars_dimscale_obj[d].objno[0] != dimscale_obj[d].objno[0]) ERR;
		     if (vars_dimscale_obj[d].fileno[1] != dimscale_obj[d].fileno[1] ||
		     vars_dimscale_obj[d].objno[1] != dimscale_obj[d].objno[1]) ERR;
		  }
	       }
	       if (H5Dclose(datasetid) < 0) ERR;
	       if (H5Sclose(spaceid) < 0) ERR;
	       break;
	    case H5G_TYPE:
	       break;
	    case H5G_LINK:
	       break;
	    default:
	       printf("Unknown object class %d!", obj_class);
	 }
      }

      /* Close up the shop. */
      if (H5Fclose(fileid) < 0) ERR;
   }

   SUMMARIZE_ERR;
   FINAL_RESULTS;
}
コード例 #23
0
ファイル: h5maxdiff.c プロジェクト: AStupidBear/Knet.jl
void rdiff(const char *name, hid_t f1, hid_t f2) {
  hid_t g1 = H5Gopen(f1, name, H5P_DEFAULT);
  hid_t g2 = H5Gopen(f2, name, H5P_DEFAULT);
  if (g1 >= 0 && g2 >= 0) {
    int n1 = H5Aget_num_attrs(g1);
    for (int i = 0; i < n1; i++) {
      char aname[MAXNAME];
      hid_t a1 = H5Aopen_idx(g1, i);
      assert(H5Aget_name(a1, MAXNAME, aname) < MAXNAME);
      H5Aclose(a1);
      if (!H5LTfind_attribute(g2, aname)) {
	printf("Only in %s[%s%s]\n", file1, name, aname);
	continue;
      }
      int d1, d2;
      H5LTget_attribute_ndims(f1, name, aname, &d1);
      H5LTget_attribute_ndims(f2, name, aname, &d2);
      assert(d1 <= 1 && d2 <= 1);
      hsize_t dims1, dims2;
      H5T_class_t t1, t2;
      size_t ts1, ts2;
      H5LTget_attribute_info(f1, name, aname, &dims1, &t1, &ts1);
      H5LTget_attribute_info(f2, name, aname, &dims2, &t2, &ts2);
      assert(t1 == t2);
      assert(t1 == H5T_INTEGER || t1 == H5T_FLOAT || t1 == H5T_STRING);
      if (t1 == H5T_INTEGER) {
	assert(d1==0 || (dims1 == 1 && dims2 == 1));
	assert(ts1 == 4 && ts2 == 4);
	int v1, v2;
	H5LTget_attribute_int(f1, name, aname, &v1);
	H5LTget_attribute_int(f2, name, aname, &v2);
	if (v1 != v2) {
	  printf("%s[%s%s]=%d %s[%s%s]=%d\n", file1, name, aname, v1, file2, name, aname, v2);
	}
      }
      if (t1 == H5T_FLOAT) {
	assert(d1==0 || (dims1 == 1 && dims2 == 1));
	assert(ts1 == 4 && ts2 == 4);
	float v1, v2;
	H5LTget_attribute_float(f1, name, aname, &v1);
	H5LTget_attribute_float(f2, name, aname, &v2);
	if (v1 != v2) {
	  printf("%s[%s%s]=%g %s[%s%s]=%g\n", file1, name, aname, v1, file2, name, aname, v2);
	}
      }
      if (t1 == H5T_STRING) {
	assert(ts1 < 256 && ts2 < 256);
	char buf1[256];
	char buf2[256];
	H5LTget_attribute_string(f1, name, aname, buf1);
	H5LTget_attribute_string(f2, name, aname, buf2);
	if (strcmp(buf1, buf2)) {
	  printf("%s[%s%s]=%s %s[%s%s]=%s\n", file1, name, aname, buf1, file2, name, aname, buf2);
	}
      }
    }
    int n2 = H5Aget_num_attrs(g2);
    for (int i = 0; i < n2; i++) {
      char aname[MAXNAME];
      hid_t a2 = H5Aopen_idx(g2, i);
      assert(H5Aget_name(a2, MAXNAME, aname) < MAXNAME);
      H5Aclose(a2);
      if (!H5LTfind_attribute(g1, aname)) {
	printf("Only in %s[%s%s]\n", file2, name, aname);
	continue;
      }
    }

    hsize_t nobj;
    H5Gget_num_objs(g1, &nobj);
    for (int i = 0; i < nobj; i++) {
      char oname[MAXNAME];
      assert(H5Gget_objname_by_idx(g1, i, oname, MAXNAME) < MAXNAME);
      int otype = H5Gget_objtype_by_idx(g1, i);
      assert(otype == H5G_DATASET);
      if (!H5LTfind_dataset(g2, oname)) {
	printf("Only in %s[%s%s]\n", file1, name, oname);
	continue;
      }
      hsize_t dims1[2], dims2[2];
      H5T_class_t t1, t2;
      size_t ts1, ts2;
      H5LTget_dataset_info(g1, oname, dims1, &t1, &ts1);
      H5LTget_dataset_info(g2, oname, dims2, &t2, &ts2);
      if (dims1[0] != dims2[0] || dims1[1] != dims2[1]) {
	printf("%s[%s%s](%d,%d) != %s[%s%s](%d,%d)\n", 
	       file1, name, oname, dims1[1], dims1[0],
	       file2, name, oname, dims2[1], dims2[0]);
	continue;
      }
      float *data1 = malloc(dims1[0]*dims1[1]*sizeof(float));
      float *data2 = malloc(dims1[0]*dims1[1]*sizeof(float));
      H5LTread_dataset_float(g1, oname, data1);
      H5LTread_dataset_float(g2, oname, data2);
      float maxdiff = 0;
      for (int i = dims1[0]*dims1[1]-1; i >= 0; i--) {
	float d = data1[i] - data2[i];
	if (d < 0) d = -d;
	if (d > maxdiff) maxdiff = d;
      }
      printf("max |%s[%s%s] - %s[%s%s]| = %g\n",
	     file1, name, oname, file2, name, oname, maxdiff);
      free(data1); free(data2);
    }
    H5Gget_num_objs(g2, &nobj);
    for (int i = 0; i < nobj; i++) {
      char oname[MAXNAME];
      assert(H5Gget_objname_by_idx(g2, i, oname, MAXNAME) < MAXNAME);
      int otype = H5Gget_objtype_by_idx(g2, i);
      assert(otype == H5G_DATASET);
      if (!H5LTfind_dataset(g1, oname)) {
	printf("Only in %s[%s%s]\n", file2, name, oname);
	continue;
      }
    }
    H5Gclose(g1);
    H5Gclose(g2);
  } else if (g1 >= 0) {
    printf("Only in %s:%s\n", file1, name);
    H5Gclose(g1);
  } else if (g2 >= 0) {
    printf("Only in %s:%s\n", file2, name);
    H5Gclose(g2);
  } else {
    printf("Group %s does not exist in either file.\n", name);
  }
}
コード例 #24
0
bool  HDFWalkerInput_0_0::put(xmlNodePtr cur)
{
  hid_t h_file =  H5Fopen(FileName.c_str(),H5F_ACC_RDWR,H5P_DEFAULT);
  hid_t h_config = H5Gopen(h_file,"config_collection");
  if(h_config<0)
  {
    app_error() << " HDFWalkerInput_0_0::put  config_collection is not found in " << FileName << "." << endl;
    H5Fclose(h_file);
    return false;
  }
  int NumSets=0;
  hid_t h1=H5Dopen(h_config,"NumOfConfigurations");
  if(h1>-1)
  {
    H5Dread(h1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,&(NumSets));
    H5Dclose(h1);
  }
  if(!NumSets)
  {
    //resolve the integer and long problem with 64bit
    hsize_t nset;
    H5Gget_num_objs(h_config,&nset);
    NumSets=nset;
  }
  if(!NumSets)
  {
    app_error() << " HDFWalkerInput_0_0::put  " << FileName << " does not contain walkers!" << endl;
    H5Gclose(h_config);
    H5Gclose(h_file);
    return false;
  }
  //select the last block
  int selected=NumSets-1;
  typedef MCWalkerConfiguration::PosType PosType;
  typedef MCWalkerConfiguration::PropertyContainer_t ProtertyContainer_t;
  typedef Matrix<PosType>  PosContainer_t;
  int nwt = 0;
  int npt = 0;
  //2D array of PosTypes (x,y,z) indexed by (walker,particle)
  PosContainer_t Pos_temp;
  //open the group
  char GrpName[128];
  sprintf(GrpName,"config%04d",selected);
  hid_t group_id = H5Gopen(h_config,GrpName);
  HDFAttribIO<PosContainer_t> Pos_in(Pos_temp);
  //read the dataset
  Pos_in.read(group_id,"coord");
  //close groups
  H5Gclose(group_id);
  H5Gclose(h_config);
  H5Fclose(h_file);
  /*check to see if the number of walkers and particles is  consistent with W */
  int nptcl = Pos_temp.cols();
  nwt = Pos_temp.rows();
  int curWalker = targetW.getActiveWalkers();
  if(curWalker)
  {
    app_log() << "HDFWalkerInput_0_0::put Adding " << nwt << " walkers to " << curWalker << endl;
    targetW.createWalkers(nwt);
  }
  else
  {
    app_log() << "HDFWalkerInput_0_0::put Creating " << nwt << " walkers." << endl;
    targetW.resize(nwt,nptcl);
  }
  //assign configurations to W
  int iw=0;
  MCWalkerConfiguration::iterator it = targetW.begin()+curWalker;
  MCWalkerConfiguration::iterator it_end = targetW.end();
  while(it != it_end)
  {
    std::copy(Pos_temp[iw],Pos_temp[iw+1], (*it)->R.begin());
    ++it;
    ++iw;
  }
  return true;
}
コード例 #25
0
ファイル: hdf5dataset.cpp プロジェクト: ksshannon/gdal
herr_t HDF5CreateGroupObjs( hid_t hHDF5, const char *pszObjName,
                            void *poHObjParent)
{
    HDF5GroupObjects *const poHparent =
        static_cast<HDF5GroupObjects *>(poHObjParent);
    HDF5GroupObjects *poHchild = poHparent->poHchild;
    H5G_stat_t oStatbuf;

    if( H5Gget_objinfo(hHDF5, pszObjName, FALSE, &oStatbuf) < 0  )
        return -1;

    // Look for next child.
    unsigned idx = 0;  // idx is used after the for loop.
    for( ; idx < poHparent->nbObjs; idx++ )
    {
        if( poHchild->pszName == nullptr ) break;
        poHchild++;
    }

    if( idx == poHparent->nbObjs )
        return -1;  // All children parsed.

    // Save child information.
    poHchild->pszName = CPLStrdup(pszObjName);

    poHchild->nType = oStatbuf.type;
    poHchild->nIndex = idx;
    poHchild->poHparent = poHparent;
    poHchild->nRank = 0;
    poHchild->paDims = nullptr;
    poHchild->HDatatype = 0;
    poHchild->objno[0] = oStatbuf.objno[0];
    poHchild->objno[1] = oStatbuf.objno[1];
    if( poHchild->pszPath == nullptr )
    {
        CreatePath(poHchild);
    }
    if( poHparent->pszPath == nullptr )
    {
        CreatePath(poHparent);
    }

    switch( oStatbuf.type )
    {
    case H5G_LINK:
    {
        poHchild->nbAttrs = 0;
        poHchild->nbObjs = 0;
        poHchild->poHchild = nullptr;
        poHchild->nRank = 0;
        poHchild->paDims = nullptr;
        poHchild->HDatatype = 0;
        break;
    }
    case H5G_GROUP:
    {
        hid_t hGroupID = H5I_INVALID_HID;  // Identifier of group.
        if( (hGroupID = H5Gopen(hHDF5, pszObjName)) == -1)
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "unable to access \"%s\" group.", pszObjName);
            return -1;
        }
        // Number of attributes in object.
        const int nbAttrs = H5Aget_num_attrs(hGroupID);
        hsize_t nbObjs = 0;  // Number of objects in a group.
        H5Gget_num_objs(hGroupID, &nbObjs);
        poHchild->nbAttrs = nbAttrs;
        poHchild->nbObjs = static_cast<int>(nbObjs);
        poHchild->nRank = 0;
        poHchild->paDims = nullptr;
        poHchild->HDatatype = 0;

        if( nbObjs > 0 )
        {
            poHchild->poHchild = static_cast<HDF5GroupObjects *>(
                CPLCalloc(static_cast<int>(nbObjs), sizeof(HDF5GroupObjects)));
            memset(poHchild->poHchild, 0,
                   static_cast<size_t>(sizeof(HDF5GroupObjects) * nbObjs));
        }
        else
        {
            poHchild->poHchild = nullptr;
        }

        if( !HDF5GroupCheckDuplicate(poHparent, oStatbuf.objno) )
            H5Giterate(hHDF5, pszObjName, nullptr, HDF5CreateGroupObjs, poHchild);
        else
            CPLDebug("HDF5", "avoiding link looping on node '%s'.", pszObjName);

        H5Gclose(hGroupID);
        break;
    }
    case H5G_DATASET:
    {
        hid_t hDatasetID = H5I_INVALID_HID;  // Identifier of dataset.
        if( (hDatasetID = H5Dopen(hHDF5, pszObjName)) == -1)
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "unable to access \"%s\" dataset.", pszObjName);
            return -1;
        }
        const int nbAttrs = H5Aget_num_attrs(hDatasetID);
        const hid_t datatype = H5Dget_type(hDatasetID);
        const hid_t dataspace = H5Dget_space(hDatasetID);
        const int n_dims = H5Sget_simple_extent_ndims(dataspace);
        const hid_t native = H5Tget_native_type(datatype, H5T_DIR_ASCEND);
        hsize_t *maxdims = nullptr;
        hsize_t *dims = nullptr;

        if( n_dims > 0 )
        {
            dims = static_cast<hsize_t *>(CPLCalloc(n_dims, sizeof(hsize_t)));
            maxdims =
                static_cast<hsize_t *>(CPLCalloc(n_dims, sizeof(hsize_t)));
        }
        H5Sget_simple_extent_dims(dataspace, dims, maxdims);
        if( maxdims != nullptr )
            CPLFree(maxdims);

        if( n_dims > 0 )
        {
            poHchild->nRank = n_dims;        // rank of the array
            poHchild->paDims = dims;         // dimension of the array.
            poHchild->HDatatype = datatype;  // HDF5 datatype
        }
        else
        {
            poHchild->nRank = -1;
            poHchild->paDims = nullptr;
            poHchild->HDatatype = 0;
        }
        poHchild->nbAttrs = nbAttrs;
        poHchild->nbObjs = 0;
        poHchild->poHchild = nullptr;
        poHchild->native = native;
        H5Tclose(datatype);
        H5Sclose(dataspace);
        H5Dclose(hDatasetID);
        break;
    }
    case H5G_TYPE:
    {
        poHchild->nbAttrs = 0;
        poHchild->nbObjs = 0;
        poHchild->poHchild = nullptr;
        poHchild->nRank = 0;
        poHchild->paDims = nullptr;
        poHchild->HDatatype = 0;
        break;
    }
    default:
        break;
    }

    return 0;
}
コード例 #26
0
void read_amuse_hdf5_data(char *filename,
                           int maxtypes,
                           int npartoftype[maxtypes],
                           int ncol,
                           int isrequired[ncol],
                           int *ierr)
   {
   hid_t     file_id;
   hid_t     group_id, group_id1, group_id2;
   herr_t    status;
   herr_t    HDF5_error = -1;
   char      groupname[12];
   char      datasetname[256];
   int i;

   if (debug) printf("DEBUG: re-opening %s \n",filename);
   file_id = H5Fopen(filename,H5F_ACC_RDONLY,H5P_DEFAULT);
   if (file_id == HDF5_error)
      { printf("ERROR re-opening %s \n",filename); *ierr = 1; return; }

   /* open main particles group */
   char *maingroup = "particles";
#if H5_VERSION_GE(1,8,0)
   group_id1 = H5Gopen2(file_id,maingroup,H5P_DEFAULT);
#else
   group_id1 = H5Gopen(file_id,maingroup);
#endif
   if (debug) printf("DEBUG: maxtypes = %i\n",maxtypes);
   
   /* read dataset for each particle type present in dump file */
   int itype,iobjtype;
   for (itype=0;itype<maxtypes;itype++) {
      if (debug) printf("DEBUG: type %i npartoftype = %i\n",itype,npartoftype[itype]);
      if (npartoftype[itype] > 0) {
         /* If npartoftype[N] > 0 in header, look for dataset of the form 000000000N */
         sprintf(groupname,"00000000%02i",itype+1);
         if (debug) printf("DEBUG: opening group %s\n",groupname);
#if H5_VERSION_GE(1,8,0)
         group_id = H5Gopen2(group_id1,groupname,H5P_DEFAULT);
#else
         group_id = H5Gopen(group_id1,groupname);
#endif
         if (group_id == HDF5_error)
            { printf("ERROR opening %s group \n",groupname); *ierr = 2; }
         else {

#if H5_VERSION_GE(1,8,0)
            group_id2 = H5Gopen2(group_id,"attributes",H5P_DEFAULT);
#else
            group_id2 = H5Gopen(group_id,"attributes");
#endif
            if (group_id2 == HDF5_error)
               { printf("ERROR opening attributes group \n"); *ierr = 2; }
            else {

               hsize_t ndatasets;
               status = H5Gget_num_objs(group_id2, &ndatasets);
               if (debug) printf("DEBUG: number of datasets = %i \n",(int)ndatasets);

               int j = 0;
               /* always read particle positions first */
               *ierr = read_amuse_hdf5_dataset(group_id2,"x",itype,maxtypes,npartoftype,ncol,isrequired,&j);
               j = 1;
               *ierr = read_amuse_hdf5_dataset(group_id2,"y",itype,maxtypes,npartoftype,ncol,isrequired,&j);
               j = 2;
               *ierr = read_amuse_hdf5_dataset(group_id2,"z",itype,maxtypes,npartoftype,ncol,isrequired,&j);

               /* read remaining datasets in the order they appear in the file */
               for(i=0; i < (int)ndatasets; i++) {
                   status       = H5Gget_objname_by_idx(group_id2, i, datasetname, 256);
                   iobjtype     = H5Gget_objtype_by_idx(group_id2, i);
                   if (strcmp(datasetname,"x")&&
                       strcmp(datasetname,"y")&&
                       strcmp(datasetname,"z")&& (iobjtype == H5G_DATASET)) {
                      *ierr = read_amuse_hdf5_dataset(group_id2,datasetname,itype,maxtypes,npartoftype,ncol,isrequired,&j);
                   }
               }

               /* close "attributes" group */
               H5Gclose(group_id2);

            }
            
            H5Gclose(group_id);
         }
      }
   }
   H5Gclose(group_id1);

   status = H5Fclose( file_id );
   if (status == HDF5_error) { printf("ERROR closing file \n"); *ierr = 7; }

   }
コード例 #27
0
void read_amuse_hdf5_header(char   *filename,
                             int *npart,
                             int *ncol,
                             int *ndim,
                             int *ndimV,
                             double *time,
                             int *ierr)
   {
   hid_t     file_id;
   hid_t     group_id, group_id1, group_id2;
   hid_t     attrib_id;
   herr_t    status;
   herr_t    HDF5_error = -1;
   
   *ierr = 0;
   *ndim = 0;
   *ndimV = 0;

   if (debug) printf("DEBUG: opening %s \n",filename);
   file_id = H5Fopen(filename,H5F_ACC_RDONLY,H5P_DEFAULT);
   if (file_id == HDF5_error)
      { printf("ERROR opening %s \n",filename); *ierr = 1; return; }
   
   char *maingroup = "particles";
   /*
    * Open the "particles" dataset and read the number of particles attribute
    *
    */
   if (!checkfordataset(file_id,maingroup))
      {
         printf(" ERROR: \"%s\" dataset not found in AMUSE HDF5 file\n",maingroup);
         *ierr = 2;
         return;
      }

#if H5_VERSION_GE(1,8,0)
   group_id1 = H5Gopen2(file_id,maingroup,H5P_DEFAULT);
#else
   group_id1 = H5Gopen(file_id,maingroup);
#endif
   if (group_id1 == HDF5_error) 
      { printf("ERROR opening %s data set \n",maingroup); *ierr = 2; return; }

#if H5_VERSION_GE(1,8,0)
   group_id = H5Gopen2(group_id1,"0000000001",H5P_DEFAULT);
#else
   group_id = H5Gopen(group_id1,"0000000001");
#endif
   if (group_id == HDF5_error) 
      { printf("ERROR opening 00000000001 data set \n"); *ierr = 2; return; }

   int nattrib;
   int i;
   char name[256];
   nattrib = H5Aget_num_attrs(group_id);
   if (debug) printf("number of attributes found = %i\n",nattrib);

   /*
    * Read through all of the attributes in the header, so we
    * can still spit out the values even if they are not used by SPLASH
    */
   for(i=0; i < nattrib; i++) {
      attrib_id = H5Aopen_idx(group_id,i);
      ssize_t  attr_status;
      attr_status = H5Aget_name(attrib_id, 256, name);
      
      hid_t  type_id;
      type_id = H5Aget_type(attrib_id);
      /*type_class = H5Tget_native_type(type_id,H5T_DIR_ASCEND);*/
      if (strcmp(name,"time")==0) {
         status = H5Aread(attrib_id,H5T_NATIVE_DOUBLE,time);
      } else if (strcmp(name,"number_of_particles")==0) {
         status = H5Aread(attrib_id,H5T_NATIVE_INT,npart);
      } else {
         if (debug) printf("DEBUG: unknown attribute %s \n",name);
      }

      if (status==HDF5_error) {
         printf(" ERROR reading attribute %s \n",name);
      }

      status = H5Aclose(attrib_id);
   }

   /*
    * Now we need to get the number of data columns in the file
    * (from the number of datasets in the "attributes" group)
    */
#if H5_VERSION_GE(1,8,0)
   group_id2 = H5Gopen2(group_id,"attributes",H5P_DEFAULT);
#else
   group_id2 = H5Gopen(group_id,"attributes");
#endif
   if (group_id2 == HDF5_error) 
      { printf("ERROR opening %s data set \n","attributes"); *ierr = 2; return; }
   
   hsize_t ndatasets;
   status = H5Gget_num_objs(group_id2, &ndatasets);
   if (debug) printf("DEBUG: number of datasets = %i \n",(int)ndatasets);

   *ncol  = (int)ndatasets;
   int idim;

   /* check that coordinates are present in file */
   idim = get_rank_by_name(group_id2,"x");
   if (idim <= 0) { printf("ERROR: x positions not found\n"); *ierr = 3; }

   idim = get_rank_by_name(group_id2,"y");
   if (idim <= 0) { printf("ERROR: y positions not found\n"); *ierr = 3; }
 
   idim = get_rank_by_name(group_id2,"z");
   if (idim <= 0) { 
      printf("z positions not found, assuming file is 2D \n");
      *ndim = 2;
      *ndimV = 2;
   } else {
      *ndim = 3;
      *ndimV = 3;
   }

   /* finish, close all open datasets and close file */

   status = H5Gclose(group_id2);
   if (status == HDF5_error)
      { printf("ERROR closing attributes data set \n"); *ierr = 3; return; }

   status = H5Gclose(group_id);
   if (status == HDF5_error) 
      { printf("ERROR closing %s data set \n",maingroup); *ierr = 3; return; }

   status = H5Gclose(group_id1);
   if (status == HDF5_error) 
      { printf("ERROR closing 0001 data set \n"); *ierr = 3; return; }

   status = H5Fclose( file_id );
   if (status == HDF5_error) { printf("ERROR closing file \n"); *ierr = 7; }
   if (debug) printf("DEBUG: finished header read \n");
   
   }
コード例 #28
0
ファイル: FWSingleOMP.cpp プロジェクト: digideskio/qmcpack
  bool FWSingleOMP::run() 
  {
    hdf_WGT_data.setFileName(xmlrootName);
    hdf_OBS_data.setFileName(xmlrootName);

    if (doWeights==1)
    {
      fillIDMatrix();        
      hdf_WGT_data.makeFile();
      hdf_WGT_data.openFile();
      hdf_WGT_data.addFW(0);
      for (int i=0;i<Weights.size();i++) hdf_WGT_data.addStep(i,Weights[i]);
      hdf_WGT_data.closeFW();
      hdf_WGT_data.closeFile();
      for(int ill=1;ill<weightLength;ill++)
      {
        transferParentsOneGeneration();
        FWOneStep();
        //       WeightHistory.push_back(Weights);
        hdf_WGT_data.openFile();
        hdf_WGT_data.addFW(ill);
        for (int i=0;i<Weights.size();i++) hdf_WGT_data.addStep(i,Weights[i]);
        hdf_WGT_data.closeFW();
        hdf_WGT_data.closeFile();
      }
    }
    else
    {
      fillIDMatrix();
      //           find weight length from the weight file
      hid_t f_file = H5Fopen(hdf_WGT_data.getFileName().c_str(),H5F_ACC_RDONLY,H5P_DEFAULT);
      hsize_t numGrps = 0;
      H5Gget_num_objs(f_file, &numGrps);
      weightLength = static_cast<int> (numGrps)-1;
      if (H5Fclose(f_file)>-1) f_file=-1;
      if (verbose>0) app_log()<<" weightLength "<<weightLength<<endl;
    }
    if (verbose>0) app_log()<<" Done Computing Weights"<<endl;


    if (doObservables==1)
    {
      int nprops = H.sizeOfObservables();//local energy, local potnetial and all hamiltonian elements
      int FirstHamiltonian = H.startIndex();
      //     vector<vector<vector<RealType> > > savedValues;

      int nelectrons = W[0]->R.size();
      int nfloats=OHMMS_DIM*nelectrons;


      //     W.clearEnsemble();
      makeClones(W,Psi,H);

      vector<ForwardWalkingData* > FWvector;
      for(int ip=0; ip<NumThreads; ip++) FWvector.push_back(new ForwardWalkingData(nelectrons));


      if (myComm->rank()==0) hdf_OBS_data.makeFile();
      hdf_float_data.openFile(fname.str());

      for(int step=0;step<numSteps;step++)
      {
        hdf_float_data.setStep(step);


        vector<RealType> stepObservables(walkersPerBlock[step]*(nprops+2), 0);
        for(int wstep=0; wstep<walkersPerBlock[step];)
        {
          vector<float> ThreadsCoordinate(NumThreads*nfloats);
          int nwalkthread = hdf_float_data.getFloat(wstep*nfloats, (wstep+NumThreads)*nfloats, ThreadsCoordinate) / nfloats;
          //         for(int j=0;j<ThreadsCoordinate.size();j++)cout<<ThreadsCoordinate[j]<<" ";
          //         cout<<endl;
#pragma omp parallel for
          for(int ip=0; ip<nwalkthread; ip++) 
          {
            vector<float> SINGLEcoordinate(0);
            vector<float>::iterator TCB1(ThreadsCoordinate.begin()+ip*nfloats), TCB2(ThreadsCoordinate.begin()+(1+ip)*nfloats);

            SINGLEcoordinate.insert(SINGLEcoordinate.begin(),TCB1,TCB2);
            FWvector[ip]->fromFloat(SINGLEcoordinate);
            wClones[ip]->R=FWvector[ip]->Pos;
            wClones[ip]->update();
            RealType logpsi(psiClones[ip]->evaluateLog(*wClones[ip]));
            RealType eloc=hClones[ip]->evaluate( *wClones[ip] );
            hClones[ip]->auxHevaluate(*wClones[ip]);
            int indx=(wstep+ip)*(nprops+2);
            stepObservables[indx]= eloc;
            stepObservables[indx+1]= hClones[ip]->getLocalPotential();
            for(int i=0;i<nprops;i++) stepObservables[indx+i+2] = hClones[ip]->getObservable(i) ;
          }
          wstep+=nwalkthread;
          for(int ip=0; ip<NumThreads; ip++)  wClones[ip]->resetCollectables();
        }
        hdf_OBS_data.openFile();
        hdf_OBS_data.addStep(step, stepObservables);
        hdf_OBS_data.closeFile();
        //       savedValues.push_back(stepObservables);
        hdf_float_data.endStep();
        if (verbose >1) cout<<"Done with step: "<<step<<endl;
      }
    }


    if(doDat>=1)
    {
      vector<int> Dimensions(4);
      hdf_WGT_data.openFile();
      hdf_OBS_data.openFile();
      Estimators->start(weightLength,1);
      int nprops;
      if (doObservables==1) nprops = H.sizeOfObservables()+2;
      else
      {
        int Noo = hdf_OBS_data.numObsStep(0);
        int Nwl = hdf_WGT_data.numWgtStep(0);
        nprops = Noo/Nwl;
      }
      for(int ill=0;ill<weightLength;ill++)
      {    
        Dimensions[0]=ill;
        Dimensions[1]= nprops ;
        Dimensions[2]=numSteps;
        Dimensions[3]=startStep;
        Estimators->startBlock(1);
        Estimators->accumulate(hdf_OBS_data,hdf_WGT_data,Dimensions);
        Estimators->stopBlock(getNumberOfSamples(ill));
      }
      hdf_OBS_data.closeFile();
      hdf_WGT_data.closeFile();
      Estimators->stop();
    }
    return true;
  }
コード例 #29
0
ファイル: hdf5Query.c プロジェクト: Wushaowei001/CodeExamples
/* ****************************************************************************************************************************** */
int main(int argc, char *argv[]) {
  hid_t   fileID, dataSetID;
  herr_t  hErrVal;
  int     i;
  hsize_t dims[1024], maxDims[1024];
  H5T_class_t class;
  char classStr[32];
  hid_t dataTypeID;
  size_t dataSize;
  H5T_order_t order;
  int rank; /* Note this is an int, not an hssize_t */
  int intVal;
  hid_t dataSpaceID;
  hid_t rootGroupID;
  hsize_t numInRootGrp, firstDataSetIdx, foundFirstDataSet;
  char attrName[1024], firstDataSetName[1024];
  ssize_t objectNameSize, attrNameSize;
  H5G_stat_t objectStatInfo;
  int numAttrs;
  int curAttrIdx;
  hid_t attrID;
  hsize_t numDataPoints;
  unsigned majnum, minnum, relnum;

  /* Load the library -- not required most platforms. */
  hErrVal = H5open();
  mjrHDF5_chkError(hErrVal);

  /* Get the library version */
  hErrVal = H5get_libversion(&majnum, &minnum, &relnum);
  mjrHDF5_chkError(hErrVal);
  printf("Lib Version: v%lu.%lur%lu\n", (unsigned long)majnum, (unsigned long)minnum, (unsigned long)relnum);

  /*  Open an existing file. */
  fileID = H5Fopen(TST_FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT);
  mjrHDF5_chkError(fileID);

  /*  Get the ID for the "root" group -- every HDF5 has one */
  rootGroupID = H5Gopen(fileID, "/", H5P_DEFAULT);
  mjrHDF5_chkError(rootGroupID);

  /* Get the number of objects in the root group. */
  hErrVal = H5Gget_num_objs(rootGroupID, &numInRootGrp);
  mjrHDF5_chkError(hErrVal);

  printf("The root group contains %lu object%c\n", (unsigned long)numInRootGrp, (numInRootGrp==1?' ':'s'));

  if(numInRootGrp < 1) {
    printf("As the file contains NO objects, I have nothing left to do...\n");
    exit(1);
  } /* end if */

  /*  Find the first dataset in the root group. */
  for(foundFirstDataSet=0,firstDataSetIdx=0; (!foundFirstDataSet)&&(firstDataSetIdx<numInRootGrp); firstDataSetIdx++) {
    /* Get object name from the index. */
    objectNameSize = H5Gget_objname_by_idx(rootGroupID, firstDataSetIdx, firstDataSetName, 1024);
    mjrHDF5_chkError(objectNameSize);
    if(objectNameSize == 0) { /* Need to check for zero return too */
      printf("ERROR: Object with index %lu doesn't exist in root group!\n", (unsigned long)firstDataSetIdx);
      exit(1);
    } /* end if */
    /*  Now use the object name to get info about the object... */
    hErrVal = H5Gget_objinfo(rootGroupID, firstDataSetName, 0, &objectStatInfo);
    mjrHDF5_chkError(hErrVal);
    /* If the object is a dataset, then print out some info. */
    if(objectStatInfo.type == H5G_DATASET) {
      printf("Object %luth (%s) is a dataset!\n", (unsigned long)firstDataSetIdx, firstDataSetName);
      printf("The name of the %luth object of the root group is: %s\n", (unsigned long)firstDataSetIdx, firstDataSetName);
      foundFirstDataSet = 1;
      printf("Info for the %s dataset:\n", firstDataSetName);
      printf("  Modify time: %lu\n", (unsigned long)objectStatInfo.mtime);
      printf("  Type: %lu\n", (unsigned long)objectStatInfo.type);
      printf("  Link count: %lu\n", (unsigned long)objectStatInfo.nlink);
    } /* end if */
  } /* end for */
  /* Note: At this point index of the dataset will be: firstDataSetIdx-- */
  if(!foundFirstDataSet) {
    printf("ERROR: Could not find a dataset in the root group\n");
    exit(1);
  } /* end if */

  /* Open the dataset we found -- we know it exists. */
  dataSetID = H5Dopen(rootGroupID, firstDataSetName, H5P_DEFAULT);
  mjrHDF5_chkError(dataSetID);

  /* ****************************************************************************************************************************** */
  /* Get some info regarding the TYPE of the dataset. */
  dataTypeID  = H5Dget_type(dataSetID);
  mjrHDF5_chkError(dataTypeID);
  /*  Get the class of the data */
  class = H5Tget_class(dataTypeID);
  mjrHDF5_Tclass2str(class, classStr);
  printf("  Object class: %s\n", classStr);
  /*  Get the size of the type */
  dataSize = H5Tget_size(dataTypeID);
  if(dataSize == 0) {
    printf("ERROR: Failure in H5Tget_size().\n");
    exit(1);
  } /* end if */
  printf("  Size of data type: %lu\n", (unsigned long)dataSize);
  /*  Get the byte order */
  order = H5Tget_order(dataTypeID);
  printf("  Byte Order: ");
  switch(order) {
    case H5T_ORDER_ERROR  : printf("ERROR\n");            break;
    case H5T_ORDER_LE     : printf("Little Endian\n");    break;
    case H5T_ORDER_BE     : printf("Big Endian\n");       break;
    case H5T_ORDER_VAX    : printf("VAX mixed endian\n"); break;
    case H5T_ORDER_MIXED  : printf("Mixed endian\n"); break;
    case H5T_ORDER_NONE   : printf("particular order\n"); break;
  } /* end switch */
  /*  We are done with the datatype. */
  hErrVal = H5Tclose(dataTypeID);
  mjrHDF5_chkError(hErrVal);

  /* ****************************************************************************************************************************** */
  /* Figure out the size of the dataset. */
  dataSpaceID = H5Dget_space(dataSetID);
  mjrHDF5_chkError(dataSpaceID);
  /*  Get the number of dims. */
  rank = H5Sget_simple_extent_ndims(dataSpaceID);
  mjrHDF5_chkError(rank);
  if(rank > 1024) {
    /*  This can't really happen (limit is 32) */
    printf("ERROR: rank too large.\n");
    exit(1);
  } /* end if */
  /* Get the size of each dim. */
  intVal = H5Sget_simple_extent_dims(dataSpaceID, dims, maxDims);
  mjrHDF5_chkError(intVal);
  printf("  Dataspace Rank %lu\n", (unsigned long)rank);
  printf("  Dim Lengths: ");
  for(i=0; i<rank; i++)
    if(dims[i] == H5S_UNLIMITED) {
      printf("%s ", "UNLIMITED");
    } else {
      printf("%ld ", (long)(dims[i]));
    } /* end if/else */
  printf("\n");
  printf("  Max Dim Lengths: ");
  for(i=0; i<rank; i++)
    if(maxDims[i] == H5S_UNLIMITED) {
      printf("%s ", "UNLIMITED");
    } else {
      printf("%ld ", (long)(maxDims[i]));
    } /* end if/else */
  printf("\n");
  numDataPoints = H5Sget_simple_extent_npoints(dataSpaceID);
  if(numDataPoints == 0) {
    printf("ERROR: Call to H5Sget_simple_extent_npoints failed.\n");
    exit(1);
  } /* end if */
  printf("Number of data points: %lu\n", (unsigned long)numDataPoints);

  /* We are done with the dataSpaceID */
  hErrVal = H5Sclose(dataSpaceID);
  mjrHDF5_chkError(hErrVal);

  /* Get the number of attributes for the dataSet. */
  numAttrs = H5Aget_num_attrs(dataSetID);
  mjrHDF5_chkError(numAttrs);

  printf("  Number of attrs: %lu\n", (unsigned long)numAttrs);

  /* If we have any attributes, we get info for them */
  if(numAttrs > 0) {
    printf("  Attribute info:\n");

    for(curAttrIdx=0; curAttrIdx<numAttrs; curAttrIdx++) {
      attrID = H5Aopen_idx(dataSetID, curAttrIdx);
      mjrHDF5_chkError(attrID);

      attrNameSize = H5Aget_name(attrID, 1024, attrName);
      mjrHDF5_chkError(attrNameSize);

      printf("    Number %3lu:  ", (unsigned long)curAttrIdx);

	  dataTypeID  = H5Aget_type(attrID);
	  mjrHDF5_chkError(dataTypeID);
	  /* Get the class for the type. */
	  class = H5Tget_class(dataTypeID);
	  mjrHDF5_Tclass2str(class, classStr);
	  printf(" Class: %-16s", classStr);
	  /*  Get the size of the type */
	  dataSize = H5Tget_size(dataTypeID);
	  if(dataSize == 0) {
		printf("ERROR: Failure in H5Tget_size().\n");
		exit(1);
	  } /* end if */
	  printf(" Size: %3lu ", (unsigned long)dataSize);
	  hErrVal = H5Tclose(dataTypeID);
	  mjrHDF5_chkError(hErrVal);

      printf(" Name: %s \n", attrName);

      hErrVal = H5Aclose(attrID);
	  mjrHDF5_chkError(hErrVal);
    } /* end for */
  } /* end if */