std::streamoff
From cppreference.com
C++
Input/output library
| I/O manipulators | ||||
| Print functions (C++23) | ||||
| C-style I/O | ||||
| Buffers | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
| Streams | ||||
| Abstractions | ||||
| File I/O | ||||
| String I/O | ||||
| Array I/O | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
| Synchronized Output | ||||
(C++20) | ||||
| Types | ||||
streamoff | ||||
| Error category interface | ||||
(C++11) | ||||
(C++11) |
| 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.
[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
| represents absolute position in a stream or a file (class template) [edit] | |
| sets the input position indicator (public member function of std::basic_istream<CharT,Traits>) [edit]
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| sets the output position indicator (public member function of std::basic_ostream<CharT,Traits>) [edit]
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