nc_error.h

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#pragma once
 
#include <exception>
#include <netcdf.h>
 
namespace dg
{
namespace file
{
 
struct NC_Error : public std::exception
{
    NC_Error( int error): m_error( error) {}
 
    int error() const { return m_error;}
    int& error() { return m_error;}
    char const* what() const noexcept{
        if ( m_error == 1000)
            return "NC ERROR Cannot operate on closed file!\n";
        else if( m_error == 1001)
            return "NC ERROR Slab dimension does not match variable dimension!\n";
        else if( m_error == 1002)
            return "NC ERROR Cannot open file. File already open!\n";
        return nc_strerror(m_error);}
  private:
    int m_error;
};
 
struct NC_Error_Handle
{
    NC_Error_Handle operator=( int err)
    {
        NC_Error_Handle h;
        return h(err);
    }
    NC_Error_Handle operator()( int err)
    {
        if( err)
            throw NC_Error( err);
        return *this;
    }
};
 
}//namespace file
}//namespace dg