Log class problems

[Alexey Parshin <alexeyp@gmail.com>]

Hello, everyone

I'm trying to make a CBaseLog class, that should meet general requirements:

1) To be a stream -derived, ie iostream, ostream, etc.. and behave like 
a stream. I any external class can print itself to a stream - it should 
be able to do it with CBaseLog class.

2) Every log statement should be completed with std::endl, and for every 
log statement it should be a call of protected virtual method saveRow(). 
This method should be implemented in derived classes like CLogger (*unix 
logger API), CFileLog,  CMemoryLog, etc..

3) CBaseLog should work identically under Windows and *nix.

I attaching my test program for your amusement..

Now, the problems:

If I'm using as a buffer a generic streambuf object, I can see that 
overwritten methods overflow() and xsputn(0 are called but only 
sometimes. Even if the size of the buffer in streambuf is set to one 
byte - overflow is called only once - for the very first data sent into 
stream..

If I'm using as a buffer a generic strstreambuf object, the overwritten 
methods are called more or less as expected, even that behaviour is 
slightly different on *nix and Windows (GCC STL vs VC++ STL). The only 
problem is - the allocated memory always grows with the new data sent to 
the stream, and I don't see how I can free the data I already used 
internally..

Any suggestion, code examples, etc would be gratefully accepted. RTFM is 
already in full use.

Alexey