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errorclass.h

gehe zur Dokumentation dieser Datei

#ifndef ERRORCLASS_H
#define ERRORCLASS_H
#include<stdarg.h>
#include<stdio.h>
#include<string.h>

// Fehlerbehandlungsklassen
class Error
{
protected:
  char errmsg[128];
public:
  Error() {}
  Error(const char *msg,...)
      {
          va_list args;
          va_start(args,msg);
          vsnprintf(errmsg,128,msg,args);
          va_end(args);
      }
  const char *what() { return errmsg; }
};

class Systemerror: public Error
{
    int errnr;
    const char *icall;
public:
    Systemerror() {}
    Systemerror(int err,char *pcall,char *msg,...)
        {
            va_list args;
            va_start(args,msg);
            init(err,pcall,msg,args);
            va_end(args);
        }

    
    void init(int err,char *pcall,char *msg,va_list args)
        {
            icall = pcall;
            char format_sp[128];
            char *format=msg;
            char *pm=strstr(msg,"%m");
            register int l = pm-format;
            if(pm!=NULL && l<120)
            {
                char *pq,*pz;
                strncpy(format_sp,msg,l);
                pq = strerror(err);
                pz=format_sp+l;
                while(pz-format_sp < 128 && *pq != '\0') *pz++=*pq++;
                pq=pm+2;
                while(pz-format_sp < 128 && *pq != '\0') *pz++=*pq++;
                *pz='\0';
                format = format_sp;
            }
            vsnprintf(errmsg,128,format,args);
        }
    int errornr() { return errnr; }
    const char *call() { return icall; }
};

class Syntaxerror: public Error
{
public:
  Syntaxerror(const char *m,...):Error()
    {
      va_list args;
      va_start(args,m);
      vsnprintf(errmsg,128,m,args);
      va_end(args);
    };
};

class Databaseerror: public Error
{
  long icode;
public:
  Databaseerror(const char *m):Error(m){};
  Databaseerror(const char *dbname,long code,const char *m,...):Error() 
    {
      char format[128];
      va_list args;
      va_start(args,m);
      snprintf(format,128,"%s-CODE %ld: %s",dbname,code,m);
      vsnprintf(errmsg,128,format,args);
      va_end(args);
      icode=code;
    }
  long code() const { return icode; }
};
#endif

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