c('Sread_pending')

Availability:C-language interface function

int Sread_pending(IOSTREAM *s, char *buf, size_t limit, int flags)

Return the data buffered on an input stream. If flags includes SIO_RP_BLOCK, fill the buffer (possibly blocking) if the buffer is empty. Update the stream position information unless flags include SIO_RP_NOPOS. This function effectively provides functionality similar to POSIX read() on a stream. This function is used by read_pending_codes/3.