From 4b436755d5895cb7113bee135d451cdeb2cf465a Mon Sep 17 00:00:00 2001
From: Robin Krahl <robin.krahl@ireas.org>
Date: Wed, 20 Feb 2019 12:31:45 +0000
Subject: Assert maximum size for command request and response structs

The request and response structs for a command should not be bigger than
the buffer they are read from or written to.  Therefore we add
assertions that enforce this property at compile time.
---
 src/util.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/util.rs')

diff --git a/src/util.rs b/src/util.rs
index c86d047..7b12afb 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -77,6 +77,15 @@ macro_rules! enum_u8 {
     };
 }
 
+macro_rules! assert_maximum_size {
+    ($i:ident; $t:ident, $e: expr) => {
+        ::static_assertions::const_assert!(
+            $i;
+            ::core::mem::size_of::<$t>() <= $e
+        );
+    }
+}
+
 pub trait TryFrom<T>: Sized {
     fn try_from(val: T) -> Result<Self, ()>;
 }
-- 
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