Sha256: 634531f47ebbb9e60cac801699e826d20dc495c50fd9d051e27dcff5d6b7cbcd
Contents?: true
Size: 1.07 KB
Versions: 8
Compression:
Stored size: 1.07 KB
Contents
use crate::{BufRead, ErrorType, Read};
impl ErrorType for &[u8] {
type Error = core::convert::Infallible;
}
/// Read is implemented for `&[u8]` by copying from the slice.
///
/// Note that reading updates the slice to point to the yet unread part.
/// The slice will be empty when EOF is reached.
impl Read for &[u8] {
#[inline]
fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
let amt = core::cmp::min(buf.len(), self.len());
let (a, b) = self.split_at(amt);
// First check if the amount of bytes we want to read is small:
// `copy_from_slice` will generally expand to a call to `memcpy`, and
// for a single byte the overhead is significant.
if amt == 1 {
buf[0] = a[0];
} else {
buf[..amt].copy_from_slice(a);
}
*self = b;
Ok(amt)
}
}
impl BufRead for &[u8] {
#[inline]
fn fill_buf(&mut self) -> Result<&[u8], Self::Error> {
Ok(*self)
}
#[inline]
fn consume(&mut self, amt: usize) {
*self = &self[amt..];
}
}
Version data entries
8 entries across 8 versions & 1 rubygems