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dsSmartException.h

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/* 
 * $Id: dsSmartException.h,v 1.7 2004/09/28 10:43:18 dsamersoff Exp $
 */
#ifndef dsSmartException_h
#define dsSmartException_h

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifdef HAVE_SYSLOG_H      
#include <syslog.h>
#endif

#include <dsStrstream.h>
#include <dsform.h>


#define DECLARE_EXCEPTION(tag) class  tag##Exception:public dsSmartException\
                        { public:\
                             tag##Exception(){ }\
                             tag##Exception(const char *format, ... )\
                               { va_list ap; va_start(ap, format); fire(#tag, (char *) format, ap); va_end(ap); }\
                             tag##Exception(int xfacility, const char *format, ... )\
                               { va_list ap; va_start(ap, format); fire(xfacility, #tag, (char *) format, ap); va_end(ap); }\
                        }


#define DECLARE_EXCEPTION2(tag, parent) class  tag##Exception:public parent##Exception\
                        { public:\
                             tag##Exception(){ }\
                             tag##Exception(const char *format, ... )\
                               { va_list ap; va_start(ap, format); fire(#tag, (char *) format, ap); va_end(ap); }\
                             tag##Exception(int xfacility, const char *format, ... )\
                               { va_list ap; va_start(ap, format); fire(xfacility, #tag, (char *) format, ap); va_end(ap); }\
                        }

class dsSmartException
{
protected:
    dsStrstream _message; 
    dsStrstream _tag;
    int _facility;


public:
    virtual const char *msg() { return _message.str();  }
    virtual const char *tag() { return _tag.str();      }
      
    dsSmartException();
    dsSmartException(char * tag, char *format, ... );
    dsSmartException(int facility, char * tag, char *format, ... );

    virtual ~dsSmartException();

    void fire(int facility, char * tag, char *format, va_list ap );

    void fire(char *format, va_list ap );
    void fire(char * tag, char *format, va_list ap );

    virtual std::ostream& print(std::ostream& os = std::cerr);
     
    int operator ==(char *val){ return ( strcmp(_tag.str(), val) == 0 ); }  

    friend std::ostream &operator<<(std::ostream &stream, dsSmartException &e);
};


inline std::ostream &operator<<(std::ostream &stream, dsSmartException &e)
{ 
        return  e.print(stream);
}

#endif

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