Error.h

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// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
// (c) COPYRIGHT URI/MIT 1999,2000
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
//      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>
 
// Interface for the Error class
//
// jhrg 4/23/96
 
#ifndef _error_h
#define _error_h
 
#include <exception>
#include <iostream>
#include <string>
 
#include <cstdio> // For FILE *
#include <utility>
 
using std::cout;
using std::ostream;
using std::string;
 
namespace libdap {

typedef int ErrorCode; // using standard errno+netCDF error codes from server

#define undefined_error 1000  
#define unknown_error 1001    
#define internal_error 1002   
#define no_such_file 1003     
#define no_such_variable 1004 
#define malformed_expr 1005   
#define no_authorization 1006 
#define cannot_read_file 1007 
#define not_implemented 1008  
#define dummy_message 1009    

 
class Error : public std::exception {
protected:
    ErrorCode _error_code;
    std::string _error_message;
    std::string d_file;
    int d_line = 0;
 
public:
    Error() : exception(), _error_code(undefined_error) {}

    Error(ErrorCode ec, std::string msg, std::string file = "", int line = 0)
        : exception(), _error_code(ec), _error_message(std::move(msg)), d_file(std::move(file)), d_line(line) {}

    explicit Error(std::string msg, std::string file = "", int line = 0)
        : exception(), _error_code(unknown_error), _error_message(std::move(msg)), d_file(std::move(file)),
          d_line(line) {}
 
    Error(const Error &copy_from) noexcept
        : exception(), _error_code(copy_from._error_code), _error_message(copy_from._error_message) {}
 
    ~Error() override = default;
 
    Error &operator=(const Error &rhs);
 
    bool OK() const;
    bool parse(FILE *fp);
    void print(FILE *out) const;
    void print(std::ostream &out) const;
    ErrorCode get_error_code() const;
    std::string get_error_message() const;
    void set_error_code(ErrorCode ec = undefined_error);
    void set_error_message(std::string msg = "");
 
    std::string get_file() const { return d_file; }
    void set_file(std::string f) { d_file = std::move(f); }
    int get_line() const { return d_line; }
    void set_line(int l) { d_line = l; }

    const char *what() const noexcept override { return _error_message.c_str(); }
};
 
} // namespace libdap
 
#endif // _error_h