H5Traits.h

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// this is -*- C++ -*-
/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef H5_TRAITS_H
#define H5_TRAITS_H

 
 
namespace H5 {
  class DataType;
}
 
namespace H5Utils {

 
  namespace internal {

    union data_buffer_t
    {
      int u_int;
      long u_long;
      long long u_llong;
      unsigned long u_ulong;
      unsigned long long u_ullong;
      unsigned int u_uint;
      unsigned char u_uchar;
      char u_char;
      float u_float;
      double u_double;
      bool u_bool;
      short u_short;
      unsigned short u_ushort;
    };

    template <typename T> struct H5Traits;
    template <> struct H5Traits<int> {
      static const H5::DataType type;
      static int& ref(data_buffer_t& buf) { return buf.u_int; }
    };
    template <> struct H5Traits<long> {
      static const H5::DataType type;
      static long& ref(data_buffer_t& buf) { return buf.u_long; }
    };
    template <> struct H5Traits<long long> {
      static const H5::DataType type;
      static long long& ref(data_buffer_t& buf) { return buf.u_llong; }
    };
    template <> struct H5Traits<unsigned long> {
      static const H5::DataType type;
      static unsigned long& ref(data_buffer_t& buf) { return buf.u_ulong; }
    };
    template <> struct H5Traits<unsigned long long> {
      static const H5::DataType type;
      static unsigned long long& ref(data_buffer_t& buf) { return buf.u_ullong; }
    };
    template <> struct H5Traits<unsigned int> {
      static const H5::DataType type;
      static unsigned int& ref(data_buffer_t& buf) { return buf.u_uint; }
    };
    template <> struct H5Traits<unsigned char> {
      static const H5::DataType type;
      static unsigned char& ref(data_buffer_t& buf) { return buf.u_uchar; }
    };
    template <> struct H5Traits<char> {
      static const H5::DataType type;
      static char& ref(data_buffer_t& buf) { return buf.u_char; }
    };
    template <> struct H5Traits<float> {
      static const H5::DataType type;
      static float& ref(data_buffer_t& buf) { return buf.u_float; }
    };
    template <> struct H5Traits<double> {
      static const H5::DataType type;
      static double& ref(data_buffer_t& buf) { return buf.u_double; }
    };
    template <> struct H5Traits<bool> {
      static const H5::DataType type;
      static bool& ref(data_buffer_t& buf) { return buf.u_bool; }
    };
    template <> struct H5Traits<short> {
      static const H5::DataType type;
      static short& ref(data_buffer_t& buf) { return buf.u_short; }
    };
    template <> struct H5Traits<unsigned short> {
      static const H5::DataType type;
      static unsigned short& ref(data_buffer_t& buf) { return buf.u_ushort; }
    };
 
  }
}
 
#endif