oefpos_t write(const char *buffer, oefpos_t len) oefpos_t write(const signed char *buffer, oefpos_t len) oefpos_t write(const unsigned char *buffer, oefpos_t len) oefpos_t write(const std::string &buffer, oefpos_t len)
Writes len
number of bytes from the specified data source
(buffer
) onto the output stream and returns the number of bytes that
were able to be written.