Trait embedded_io::BufRead
source · pub trait BufRead: ErrorType {
// Required methods
fn fill_buf(&mut self) -> Result<&[u8], Self::Error>;
fn consume(&mut self, amt: usize);
}
Expand description
Blocking buffered reader.
This trait is the embedded-io
equivalent of [std::io::BufRead
].
Required Methods§
sourcefn fill_buf(&mut self) -> Result<&[u8], Self::Error>
fn fill_buf(&mut self) -> Result<&[u8], Self::Error>
Return the contents of the internal buffer, filling it with more data from the inner reader if it is empty.
If no bytes are currently available to read, this function blocks until at least one byte is available.
If the reader is at end-of-file (EOF), an empty slice is returned. There is no guarantee that a reader at EOF will always be so in the future, for example a reader can stop being at EOF if another process appends more bytes to the underlying file.