std::streamoff
From cppreference.com
| Defined in header <ios>
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| typedef /*implementation-defined*/ streamoff; |
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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.
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
See also
| represents absolute position in a stream or a file (class template) | |
| sets the input position indicator (public member function of std::basic_istream<CharT,Traits>) | |
| sets the output position indicator (public member function of std::basic_ostream<CharT,Traits>) |