pub fn copy<R: ?Sized, W: ?Sized>(reader: &mut R, writer: &mut W) -> Result<u64> where R: Read, W: Write,
Copies the entire contents of a reader into a writer.
This function will continuously read data from
reader and then write it into
writer in a streaming fashion until
reader returns EOF.
On success, the total number of bytes that were copied from
writer is returned.
This function will return an error immediately if any call to
write returns an error. All instances of
ErrorKind::Interrupted are handled by this function and the underlying operation is retried.
use std::io; let mut reader: &[u8] = b"hello"; let mut writer: Vec<u8> = vec!; io::copy(&mut reader, &mut writer)?; assert_eq!(reader, &writer[..]);
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.