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std::basic_...f::in_avail(3) C++ Standard Libary std::basic_...f::in_avail(3) NAME std::basic_streambuf::in_avail - std::basic_streambuf::in_avail Synopsis std::streamsize in_avail(); Returns the number of characters available in the get area. If a read position is available, effectively returns egptr() - gptr(), the size of the get area. In this case, the number of bytes returned is the number of bytes that can be extracted from the buffer without calling underflow(). If the get area is empty, calls showmanyc() to determine the number of bytes available in the associated character sequence. In this case, the value returned is the number of bytes that can be extracted from the buffer while it's guaranteed that underflow() would not return Traits::eof. Parameters (none) Return value The number of characters available for non-blocking read (either the size of the get area or the number of characters ready for reading from the associ- ated character sequence), or -1 if no characters are available in the associated sequence as far as showmanyc() can tell. Example This section is incomplete Reason: no example See also showmanyc optionally provides the number of characters available for input from the [virtual] file (virtual protected member function of std::basic_file- buf<CharT,Traits>) readsome extracts already available blocks of characters (public member function of std::ba- sic_istream<CharT,Traits>) http://cppreference.com 2022.07.31 std::basic_...f::in_avail(3)
NAME | Synopsis | Parameters | Return value | Example | See also
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