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(iostream-295.info)Streambuf

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Using the `streambuf' Layer
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   The `istream' and `ostream' classes are meant to handle conversion
between objects in your program and their textual representation.

   By contrast, the underlying `streambuf' class is for transferring
raw bytes between your program, and input sources or output sinks.
Different `streambuf' subclasses connect to different kinds of sources
and sinks.

   The GNU implementation of `streambuf' is still evolving; we describe
only some of the highlights.

Areas

Areas in a streambuf.

Overflow

Simple output re-direction

Formatting

C-style formatting for streambuf objects.

Stdiobuf

Wrappers for C stdio.

Procbuf

Reading/writing from/to a pipe

Backing Up

Marking and returning to a position.

Indirectbuf

Forwarding I/O activity.