std::streamoff
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Types
streamoff
Error category interface
(C++11)
(C++11)
Defined in header
<ios>
typedef /*implementation-defined*/ streamoff;
The type std::streamoff is an implementation-defined signed integral(since C++11) type of sufficient size to represent the maximum possible file size supported by the operating system. Typically, this is an alias for long long.(since C++11)
It is used to represent offsets from stream positions (values of type std::fpos ). A std::streamoff value constructed from -1 is also used to represent error conditions by some of the I/O library functions.
[edit] Relationship with std::fpos
- the difference between two std::fpos objects is a value of type
std::streamoff
- a value of type
std::streamoffmay be added or subtracted from std::fpos yielding a different std::fpos .
- a value of type std::fpos is implicitly convertible to
std::streamoff(the conversion result is the offset from the beginning of the file).
- a value of type std::fpos is constructible from a value of type
std::streamoff
[edit] See also
sets the input position indicator
(public member function of
(public member function of
std::basic_istream<CharT,Traits>) [edit]