std::basic_streambuf<CharT,Traits>::pubseekpos, std::basic_streambuf<CharT,Traits>::seekpos
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std::basic_streambuf
Public member functions
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Positioning
basic_streambuf::pubseekpos
Get area
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Protected member functions
(C++11)
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Locales
Positioning
basic_streambuf::seekpos
Get area
Put area
Putback
pos_type pubseekpos( pos_type pos,
std::ios_base::openmode which = std::ios_base::in | std::ios_base::out );
(1)
std::ios_base::openmode which = std::ios_base::in | std::ios_base::out );
protected:
(2)
virtual pos_type seekpos( pos_type pos,
Sets the position indicator of the input and/or output sequence to an absolute position.
1) Calls seekpos(pos, which) of the most derived class.
2) The base class version of this function has no effect. The derived classes may override this function to allow absolute positioning of the position indicator.
[edit] Parameters
pos
-
absolute position to set the position indicator to
which
-
defines which of the input and/or output sequences to affect. It can be one or a combination of the following constants:
repositions the file position, using absolute addressing
(virtual protected member function of
repositions the next pointer in the input sequence, output sequence, or both using absolute addressing
(virtual protected member function of
Constant
Explanation
in
affect the input sequence
out
affect the output sequence
[edit] Return value
1) The return value of seekpos(pos, which).
2) The resulting absolute position as defined by the position indicator. The base class version returns pos_type(off_type(-1)).
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 55 | C++98 | the base class version of seekpos returnedan undefined invalid stream position |
returns pos_type(off_type(-1)) |
[edit] See also
[virtual]
(virtual protected member function of
std::basic_filebuf<CharT,Traits>) [edit]
[virtual]
(virtual protected member function of
std::basic_stringbuf<CharT,Traits,Allocator>) [edit]