Function in io::sync coil-stdlib

`read_exact`

fn read_exact(Stream s, Vec<byte> buf) -> Result<Option<int>, IoError>

Import

use io::sync::{read_exact};

Source: src/io/sync.hy

Fills all of buf from s, waiting whenever no data is ready.

Returns Some(n): n is buf.len() once buf is full, or fewer when the stream ends part way. Returns None when the stream ends before any byte.

Parameters#

Name	Type
`s`	`Stream`
`buf`	`Vec<byte>`

Returns#

Result<Option<int>, IoError>

See also#

write_all: Writes all of buf to s, waiting whenever the stream is not ready.
read_to_end: Reads from s until it ends and returns everything read.
accept_wait: Waits for the next connection on a TCP listener and returns its stream.
recv_from_wait: Waits for a UDP datagram, reads it into buf, and returns (bytes, sender host, sender port).
send_to_wait: Sends buf as one UDP datagram to host:port, waiting while the socket is not ready.
copy: Copies the file src to dst.
print: Writes s to standard output, without a newline.
println: Writes s and a newline to standard output.