29 Input/output library [input.output]

29.6 Stream buffers [stream.buffers]

29.6.3 Class template basic_­streambuf [streambuf]

29.6.3.4 Virtual functions [streambuf.virtuals]

29.6.3.4.2 Buffer management and positioning [streambuf.virt.buffer]

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basic_streambuf* setbuf(char_type* s, streamsize n);
1
#
Effects: Influences stream buffering in a way that is defined separately for each class derived from basic_­streambuf in this Clause ([stringbuf.virtuals], [filebuf.virtuals]).
2
#
Default behavior: Does nothing.
Returns this.
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pos_type seekoff(off_type off, ios_base::seekdir way, ios_base::openmode which = ios_base::in | ios_base::out);
3
#
Effects: Alters the stream positions within one or more of the controlled sequences in a way that is defined separately for each class derived from basic_­streambuf in this Clause ([stringbuf.virtuals], [filebuf.virtuals]).
4
#
Default behavior: Returns pos_­type(off_­type(-1)).
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pos_type seekpos(pos_type sp, ios_base::openmode which = ios_base::in | ios_base::out);
5
#
Effects: Alters the stream positions within one or more of the controlled sequences in a way that is defined separately for each class derived from basic_­streambuf in this Clause ([stringbuf], [filebuf]).
6
#
Default behavior: Returns pos_­type(off_­type(-1)).
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int sync();
7
#
Effects: Synchronizes the controlled sequences with the arrays.
That is, if pbase() is non-null the characters between pbase() and pptr() are written to the controlled sequence.
The pointers may then be reset as appropriate.
8
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Returns: -1 on failure.
What constitutes failure is determined by each derived class ([filebuf.virtuals]).
9
#
Default behavior: Returns zero.