Re: Log class problems

[Alexey Parshin <alexeyp@gmail.com>]

I have finally commited a first draft of very first class - CLogFile, to
SPTK, along with the test example. I'd add logger interface in a day or two.

2006/1/30, Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>:
>
> OK.
> Take a look at
>
> http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/classstd_1_1basic__streambuf.html#std_1_1basic__streambufb3
>
> See what base class version of overflow does...
>
>
> Alexey Parshin wrote:
>
> >Since the attachment doesn't work - sending it directly
> >
> >//#include "stdafx.h"
> >#include <iostream>
> >#include <strstream>
> >
> >using namespace std;
> >
> >class CLogStreamBuf : public streambuf {
> >   iostream *m_parent;
> >   char     *m_start;
> >   char     *m_end;
> >   char     *m_buffer;
> >protected:
> >   virtual int_type overflow(int_type c);
> >   virtual streamsize xsputn(const char_type* s, streamsize n);
> >public:
> >   CLogStreamBuf() {
> >       m_buffer = new char[16];
> >       setbuf(m_buffer,16);
> >   }
> >   ~CLogStreamBuf() {
> >       cout << "Destructor" << endl;
> >       delete m_buffer;
> >   }
> >};
> >
> >class CLog : public iostream {
> >   CLogStreamBuf m_buffer;
> >public:
> >   CLog() : iostream(&m_buffer),ios(0) {}
> >   ~CLog() { flush(); }
> >};
> >
> >streambuf::int_type CLogStreamBuf::overflow(streambuf::int_type c) {
> >   int bytes = pptr() - pbase();
> >   cout << "in overflow, char = '" << char(c) << "' " << c << " - was "
> <<
> >bytes << " bytes" << endl;
> >   streambuf::int_type rc = streambuf::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 = streambuf::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;
> >}
> >
> >
> >
> >--
> >Alexey Parshin,
> >http://www.sptk.net
> >
> >
> >
>
> --
> Ilya A. Volynets-Evenbakh
> Total Knowledge. CTO
> http://www.total-knowledge.com
>
>


--
Alexey Parshin,
http://www.sptk.net