std::streamsize - cppreference.com (original) (raw)

| Defined in header | | | | -------------------------------------------------------------- | | | | typedef /*implementation-defined*/ streamsize; | | |

The type std::streamsize is a signed integral type used to represent the number of characters transferred in an I/O operation or the size of an I/O buffer. It is used as a signed counterpart of std::size_t, similar to the POSIX type ssize_t.

[edit] Notes

Except in the constructors of std::strstreambuf, negative values of std::streamsize are never used.

[edit] Example

#include #include   static_assert(std::is_signed_vstd::streamsize);   int main() { std::cout << sizeof(std::streamsize) << '\n'; }

Possible output:

[edit] See also

| | returns number of characters extracted by last unformatted input operation (public member function of std::basic_istream<CharT,Traits>) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | | extracts and discards characters until the given character is found (public member function of std::basic_istream<CharT,Traits>) [edit] | | | extracts blocks of characters (public member function of std::basic_istream<CharT,Traits>) [edit] | | | inserts blocks of characters (public member function of std::basic_ostream<CharT,Traits>) [edit] |