Re: Log class problems

[Alexey Parshin <alexeyp@gmail.com>]

Forgot to add a damn class - sorry :)

2006/1/29, Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>:

And attachement is ....? ;-)

--
Ilya A. Volynets-Evenbakh
Total Knowledge. CTO
http://www.total-knowledge.com

-- 
Alexey Parshin,
http://www.sptk.net
#include <iostream>
#include <strstream>

using namespace std;

class CLogStreamBuf : public strstreambuf {
   iostream *m_parent;
   char     *m_start;
   char     *m_end;
protected:
   virtual int_type overflow(int_type c);
   virtual streamsize xsputn(const char_type* s, streamsize n);
public:
   CLogStreamBuf() { m_start = m_end = 0L; }
   void setParent(iostream *parent) { m_parent = parent; }
   ~CLogStreamBuf() { cout << "Destructor" << endl; }
};

class CLog : public iostream {
   CLogStreamBuf m_buffer;
public:
   CLog() : iostream(&m_buffer),ios(0) { m_buffer.setParent(this); }
   ~CLog() { flush(); }
}; 

strstreambuf::int_type CLogStreamBuf::overflow(strstreambuf::int_type c) {
   int bytes = pptr() - pbase();
   //cout << "in overflow, char = '" << char(c) << "' " << c << " - was " << bytes << " bytes" << endl;
   strstreambuf::int_type rc = strstreambuf::overflow(c);
   return rc;
}

streamsize CLogStreamBuf::xsputn(const char_type* s, streamsize n) {
   int bytes = pptr() - pbase();
   char *buff = new char[n+1];
   strncpy(buff,s,n); buff[n] = 0;
   //cout << "in xsputn, str = " << buff << " - was " << bytes << " bytes" << endl;
   delete buff;
   streamsize rc = strstreambuf::xsputn(s,n);

   while ( sgetc() != EOF )  {
      char ch = sbumpc();
      //if (ch == 10) cout << endl;
      //else 
      if (ch >= 10)
         cout << ch;
   }
   return rc;
}

int main(int argc,char *argv[]) {
   CLog cl;
   for (unsigned i = 0; i < 4; i++)
      cl << "line" << i << " " << 12345 << " out " << endl << endl;
}