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sys_util: write_zeros: Make clippy clean

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favor `if let` over `match` for destructing a single value.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Change-Id: I0c09d7ffc380e84d7413d6fed338d65a60563a8f
Reviewed-on: https://chromium-review.googlesource.com/1510069
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
This commit is contained in:
Dylan Reid 2019-03-07 14:53:39 -08:00 committed by chrome-bot
parent 6a6a36022b
commit 31c79375da
1 changed files with 6 additions and 7 deletions
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7
sys_util/src/write_zeroes.rs
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@ -32,14 +32,13 @@ impl<T: PunchHole + Seek + Write> WriteZeroes for T {
fn write_zeroes(&mut self, length: usize) -> io::Result<usize> { fn write_zeroes(&mut self, length: usize) -> io::Result<usize> {
// Try to punch a hole first. // Try to punch a hole first.
let offset = self.seek(SeekFrom::Current(0))?; let offset = self.seek(SeekFrom::Current(0))?;
match self.punch_hole(offset, length as u64) { if let Ok(()) = self.punch_hole(offset, length as u64) {
Ok(()) => {
// Advance the seek cursor as if we had done a real write(). // Advance the seek cursor as if we had done a real write().
self.seek(SeekFrom::Current(length as i64))?; self.seek(SeekFrom::Current(length as i64))?;
return Ok(length); return Ok(length);
} }
Err(_) => {} // fall back to write()
} // fall back to write()
// punch_hole() failed; fall back to writing a buffer of zeroes // punch_hole() failed; fall back to writing a buffer of zeroes
// until we have written up to length. // until we have written up to length.