ErrorCode.h

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// Copyright 2014 GSI, Inc. All rights reserved.
//
// error cods collection file
//
#ifndef _DDS_ERRORCODE_H_
#define _DDS_ERRORCODE_H_

// API
#include <errno.h>
#include <stdlib.h>
#include <string.h>
// STD
#include <sstream>
#include <string>

namespace dds::misc
{
    typedef int ERRORCODE;
    typedef const ERRORCODE ERRORCODE_C;

    ERRORCODE_C erOK(EXIT_SUCCESS);
    ERRORCODE_C erTrue(-1);
    ERRORCODE_C erFalse(-2);
    ERRORCODE_C erError(EXIT_FAILURE);
    ERRORCODE_C erNotImpl(3);

#define SUCCEEDED(er) (er <= erOK)
#define FAILED(er) (!SUCCEEDED(er))

    // General Error codes
    ERRORCODE_C BASE_FOR_GENERAL_ERR(50); // <<<----- BASE counter
    ERRORCODE_C erNULLArg(BASE_FOR_GENERAL_ERR + 1);
    ERRORCODE_C erFILE_NOT_FOUND(BASE_FOR_GENERAL_ERR + 2);

    // XML Error codes
    ERRORCODE_C BASE_FOR_XML_ERR(100); // <<<----- BASE counter
    ERRORCODE_C erXMLInit(BASE_FOR_XML_ERR + 1);
    ERRORCODE_C erXMLReadConfig(BASE_FOR_XML_ERR + 2);
    ERRORCODE_C erXMLNullNode(BASE_FOR_XML_ERR + 3);

    inline int errno2str(std::string* _msg)
    {
        if (!_msg)
            return erNULLArg;
        char* p = strerror(errno);
        *_msg = p;
        return errno;
    }
    inline std::string errno2str()
    {
        char* p = strerror(errno);
        return std::string(p);
    }
    class system_error : public std::exception
    {
      public:
        explicit system_error(const std::string& _ErrorPrefix)
        {
            m_errno = errno;
            const char* const szError = strerror(m_errno);
            std::stringstream ss;
            if (!_ErrorPrefix.empty())
                ss << _ErrorPrefix << ". ";
            ss << "System error description [" << m_errno << "]: " << szError;
            m_Msg = ss.str();
        }
        virtual ~system_error() throw()
        {
        }
        virtual const char* what() const throw()
        {
            return m_Msg.c_str();
        }
        int getErrno() const throw()
        {
            return m_errno;
        }

      private:
        std::string m_Msg;
        int m_errno;
    };
}; // namespace dds::misc

#endif // _DDS_ERRORCODE_H_