b0VIM 8.1 H] � nmryan LASLW16010654 D:/tools/backplane/src/stream_read.rs
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� � � ' � � � � b T J D B A � � 9 8 ( � � � 9 3 1 0 � � y x 7 � � c b 7 � � 6 5 " � x < 1 0 � � � � � } } } } return StreamReadResult::Error(string); Err(string) => { }, return StreamReadResult::BytesRead(bytes_read); bytes.truncate(old_len + bytes_read); // if byte were read, set the BytesMut length to reflect the new data available Ok(bytes_read) => { match result { .map_err(|err| format!("Stream Read Error: {}", err)); let result = reader.read(&mut mut_bytes[old_len..(old_len + num_bytes)]) // read up to num_bytes bytes from the reader let mut_bytes: &mut [u8] = bytes.borrow_mut(); // retrieve the underlying byte buffer bytes.resize(new_len, 0); // set_len. This has not been done to avoid use of 'unsafe'. // NOTE this zeroing of memory could be avoided with a use of the unsafe function bytes.reserve(num_bytes); // ensure that there is room for the request number of bytes let new_len = old_len + num_bytes; let old_len = bytes.len(); fn read_bytes_from_reader<R: Read>(reader: &mut R, bytes: &mut BytesMut, num_bytes: usize) -> StreamReadResult { } } } else if let Ok(tcp_client_settings) = TcpClientSettings::from_str(read_stream_descr) { } } else if let Ok(tcp_server_settings result = Ok(udp_settings.open_read_stream()); } else if let Ok(udp_settings) = UdpSetti result = result = Ok(udp_settings.open_read_stream()); } else if let Ok( result = Ok(udp_settings.open_read_stream()); result = Ok(udp_settings.open_read_stream()); } else if let Ok(udp_s result = Ok(udp_settings.open_read_stream()); } } } } return StreamReadResult::Error(string); Err(string) => { }, return StreamReadResult::BytesRead(bytes_read); Ok(bytes_read) => { match self.recv(bytes).map_err(|err| format!("Udp Socket Read Error: {}", err)) { bytes.clear(); // for UDP we just read a message fn read_bytes(&mut self, bytes: &mut BytesMut, _num_bytes: usize) -> StreamReadResult { impl StreamRead for UdpSocket { } } } return result; } else { return StreamReadResult::Finished; // possible! // NOTE assumes that the end of the file is the end of the stream, and no new data is if let StreamReadResult::BytesRead(0) = result { let result = read_bytes_from_reader(self, bytes, num_bytes); fn read_bytes(&mut self, bytes: &mut BytesMut, num_bytes: usize) -> StreamReadResult { impl StreamRead for BufReader<File> { } } read_bytes_from_reader(self, bytes, num_bytes) fn read_bytes(&mut self, bytes: &mut BytesMut, num_bytes: usize) -> StreamReadResult { impl StreamRead for TcpStream { } fn read_bytes(&mut self, bytes: &mut BytesMut, num_bytes: usize) -> StreamReadResult; pub trait StreamRead { } Error(String), Finished, BytesRead(usize), pub enum StreamReadResult { // TODO this might include stdin reading // TODO this should include serial reading // TODO this error return of String should be replaced with a error handling strategy // case of files which are being written as well as read. // a timeout, or infinite (block until data is available). This would cover the // ideally there would be a timeout provided, which could be 0 (non-blocking) // TODO this API does not make blocking vs non-block calls apparent use bytes::BytesMut; use std::borrow::BorrowMut; use std::net::{TcpStream, UdpSocket}; use std::io::{Read, BufReader}; use std::fs::File; ad � � � o H G � � � P 2 1 �
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} } } } } return StreamReadResult::Error(string); Err(string) => } } } return StreamReadResult::Error } } } return StreamReadResult::Error(string); Err(string) => } } } return StreamReadResult::Error } } } } } return StreamRead } } } } } } } } return StreamReadResult::Error(string); Err(string) => { }, return StreamReadResult::BytesRead(bytes_read); bytes.truncate(old_len + bytes_read); // if byte were read, set the BytesMut length to reflect the new data available Ok(bytes_read) => { match result { .map_err(|err| format!("Stream Read Error: {}", err)); let result = reader.read(&mut mut_bytes[old_len..(old_len + num_bytes)]) // read up to num_bytes bytes from the reader let mut_bytes: &mut [u8] = bytes.borrow_mut(); // retrieve the underlying byte buffer bytes.resize(new_len, 0); // set_len. This has not been done to avoid use of 'unsafe'. // NOTE this zeroing of memory could be avoided with a use of the unsafe function bytes.reserve(num_bytes); // ensure that there is room for the request number of bytes let new_len = old_len + num_bytes; let old_len = bytes.len(); fn read_bytes_from_reader<R: Read>(reader: &mut R, bytes: &mut BytesMut, num_bytes: usize) -> StreamReadResult {