// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef toolx_hdf5_atb
#define toolx_hdf5_atb

// The below is internal methods in the HDF5 lib.

#include "hdf5_h"

#include <cstring>

namespace toolx {
namespace hdf5 {

inline herr_t H5LT_get_attribute_mem(hid_t obj_id,const char *attr_name,hid_t mem_type_id,void *data ) {
  hid_t attr_id;
  if ( ( attr_id = ::H5Aopen_name( obj_id, attr_name ) ) < 0 )  return -1;
  if ( ::H5Aread( attr_id, mem_type_id, data ) < 0 ) {
    ::H5Aclose( attr_id );
    return -1;
  }
  if ( ::H5Aclose( attr_id ) < 0 )  return -1;
  return 0;
}

inline herr_t find_attr( hid_t loc_id, const char *name, void *op_data) {
  int ret = 0;
  char *attr_name = (char*)op_data;
  if( ::strcmp( name, attr_name ) == 0 ) ret = 1;
  (void)loc_id;
  return ret;
}

inline herr_t H5LT_find_attribute( hid_t loc_id, const char* attr_name ) {
  unsigned int attr_num;
  attr_num = 0;
  return toolx_H5Aiterate( loc_id, &attr_num, find_attr, (void *)attr_name );
}

inline herr_t H5LT_get_attribute_disk( hid_t loc_id,const char *attr_name,void *attr_out ) {
  hid_t      attr_id;
  if ( ( attr_id = ::H5Aopen_name( loc_id, attr_name ) ) < 0 )  return -1;

  hid_t      attr_type;
  if ( (attr_type = ::H5Aget_type( attr_id )) < 0 ) {
    ::H5Tclose( attr_type );
    ::H5Aclose( attr_id );
    return -1;
  }

  if ( ::H5Aread( attr_id, attr_type, attr_out ) < 0 ) {
    ::H5Tclose( attr_type );
    ::H5Aclose( attr_id );
    return -1;
  }

  if ( ::H5Tclose( attr_type )  < 0 ) {
    ::H5Tclose( attr_type );
    ::H5Aclose( attr_id );
    return -1;
  }

  if ( ::H5Aclose( attr_id ) < 0 )  return -1;

  return 0;

}

}}

#endif