HDFSPArray_RealField.h

// This file is part of the hdf4 data handler for the OPeNDAP data server.
// It retrieves the real field values for some special NASA HDF data.
//  Authors:   Kent Yang <myang6@hdfgroup.org>  
// Copyright (c) The HDF Group
 
#ifndef HDFSPARRAY_REALFIELD_H
#define HDFSPARRAY_REALFIELD_H
 
#include "mfhdf.h"
#include "hdf.h"
 
#include <libdap/Array.h>
 
#include "HDFSPEnumType.h"
#include "BESH4MCache.h"
 
 
class HDFSPArray_RealField:public libdap::Array
{
    public:
        HDFSPArray_RealField (int32 rank, const std::string& filename, const int sdfd, int32 fieldref, int32 dtype, const SPType & sptype, const std::string & fieldname, const std::vector<int32> & h4_dimsizes, const std::string & n = "", libdap::BaseType * v = nullptr):
            Array (n, v),
            rank (rank),
            filename(filename),
            sdfd (sdfd),
            fieldref (fieldref), 
            dtype (dtype), 
            sptype (sptype), 
            fieldname (fieldname),
            dimsizes(h4_dimsizes) {
        }
        ~ HDFSPArray_RealField () override = default;
        int format_constraint (int *cor, int *step, int *edg);
 
        libdap::BaseType *ptr_duplicate () override
        {
            return new HDFSPArray_RealField (*this);
        }
 
        bool read () override;
 
    private:
        int32 rank;
        string filename;
        int32 sdfd;
        int32 fieldref;
        int32 dtype;
        SPType sptype;
        std::string fieldname;
        std::vector<int32>dimsizes;
        void write_data_to_cache(int32,const std::string&,short,const std::vector<char>&, int);
        bool obtain_cached_data(BESH4Cache*,const std::string&, int,std::vector<int>&, std::vector<int>&,size_t,short);
        template<typename T> int subset(const T input[],int,std::vector<int32>&,std::vector<int>&,std::vector<int>&,std::vector<int>&,std::vector<T>*,std::vector<int32>&,int);
};
 
 
#endif