# std::basic_streambuf::pubseekoff, std::basic_streambuf::seekoff

From cppreference.com
< cpp‎ | io‎ | basic streambuf

pos_type pubseekoff( off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which = ios_base::in | ios_base::out ); | (1) |
protected: virtual pos_type seekoff( off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which = ios_base::in | ios_base::out ); | (2) |

Sets the position indicator of the input and/or output sequence relative to some other position.

1) Calls `seekoff(off, dir, 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 relative positioning of the position indicator.

### Parameters

off | - | relative position to set the position indicator to.

dir

-

defines base position to apply the relative offset to. It can be one of the following constants:

Constant | Explanation
`beg` | the beginning of a stream
`end` | the ending of a stream
`cur` | the current position of stream position indicator

which

-

defines which of the input and/or output sequences to affect. It can be one or a combination of the following constants:

Constant | Explanation
`in` | affect the input sequence
`out` | affect the output sequence

### Note

Not all combinations of parameters may be valid, see the derived versions of `seekoff` for details.

### Return value

1) The return value of `seekoff(off, dir, which)`

2) The resulting absolute position as defined by the position indicator. The base class version returns pos_type(off_type(-1)).

### Example

| This section is incomplete Reason: no example

### See also

pubseekpos | invokes seekpos() (public member function)
seekoff [virtual] | repositions the file position, using relative addressing (virtual protected member function of `std::basic_filebuf`)
seekoff [virtual] | repositions the next pointer in the input sequence, output sequence, or both, using relative addressing (virtual protected member function of `std::basic_stringbuf`)
seekoff [virtual] | repositions the next pointer in the input sequence, output sequence, or both, using relative addressing (virtual protected member function of `std::strstreambuf`)

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_streambuf/pubseekoff&oldid=88055"
Category:

- Todo no example