rdbuf() stream

[Zaharije Pasalic]

What is purpose of rdbuf methode of stream class? Is rdbuf create new
buffer or just return some kind of pointer to existing?

Thanks,
Zaharije Pasalic

[Ivan Vecerina]

"Zaharije Pasalic" <za**************@pmf.unsa.ba> wrote in message
news:f8**************************@posting.google.c om...

What is purpose of rdbuf methode of stream class? Is rdbuf create new
buffer or just return some kind of pointer to existing?

A pointer to the existing buffer.

All the stream classes (fstream, stringstream) derive from the
same base class(es) (stream, ostream, etc), without overriding
any virtual functions (except the destructor). However, each
of these subclasses stores internally a different kind of
stream buffer class, which is polymorphic, and decides what
the source/destination of the stream's data should be.
hth -Ivan
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[Dietmar Kuehl]

Zaharije Pasalic wrote:

What is purpose of rdbuf methode of stream class? Is rdbuf create new
buffer or just return some kind of pointer to existing?

'rdbuf()' accesses the stream buffer associated with a stream. There
are two overloads for 'rdbuf()', one reading the stream buffer and
one setting it (why it is called "rdbuf" is, however, beyond me).
Stream buffers abstract the character sequence a stream writes to.
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