From 191444797d415446744b742ebb7eab5e10f08cbc Mon Sep 17 00:00:00 2001
From: Allen Webb <allenwebb@google.com>
Date: Fri, 8 Jan 2021 07:48:29 -0600
Subject: [PATCH] data_model: Ad is_empty to fix clippy warning.

warning: item `sys::IoSliceMut<'a>` has a public `len` method but no
corresponding `is_empty` method
  --> /mnt/host/source/src/platform/crosvm/data_model/src/sys.rs:23:1

Also, add .idea to the .gitignore to ignore Intelij projects.

BUG=None
TEST=(cd data_model && cargo clippy)

Change-Id: I3ce0dc49bcb75ac16bc9ae3b6eec8d34f25919c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2616806
Reviewed-by: Noah Gold <nkgold@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Allen Webb <allenwebb@google.com>
---
 .gitignore            | 1 +
 data_model/src/sys.rs | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/.gitignore b/.gitignore
index 0db5dafd9e..1476227f1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ target/
 **/Cargo.lock
 !/Cargo.lock
 lcov.info
+.idea
diff --git a/data_model/src/sys.rs b/data_model/src/sys.rs
index 58813340a6..0086eff0a6 100644
--- a/data_model/src/sys.rs
+++ b/data_model/src/sys.rs
@@ -48,6 +48,11 @@ impl<'a> IoSliceMut<'a> {
         self.iov.iov_len as usize
     }
 
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.iov.iov_len == 0
+    }
+
     /// Gets a const pointer to this slice's memory.
     #[inline]
     pub fn as_ptr(&self) -> *const u8 {