Use arrays instead of slices where possible

To increase type safety, we use references to (sized) arrays instead of
slices where possible.

2 files changed, 7 insertions, 3 deletions

diff --git a/src/commands.rs b/src/commands.rs
index d05423e..99e049f 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -6,7 +6,7 @@ use core::default::Default;
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 
-use crate::device::CommandStatus;
+use crate::device::{CommandStatus, RequestData, ResponseData};
 
 enum_cmd! {
     #[derive(Clone, Copy, Debug, PartialEq)]
@@ -79,7 +79,7 @@ impl Command for ReadSlotNameCommand {
     }
 }
 
-fn execute<C: Command>(data: &[u8], buf: &mut [u8]) -> CommandStatus {
+fn execute<C: Command>(data: &RequestData, buf: &mut ResponseData) -> CommandStatus {
     // TODO: better error if (de-)serialization fails
     if let Ok((request, _)) = ssmarshal::deserialize::<C::Request>(data) {
         match C::execute(request) {
diff --git a/src/util.rs b/src/util.rs
index cbe7c0d..c86d047 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -21,7 +21,11 @@ macro_rules! enum_cmd {
         }
 
         impl $name {
-            pub fn execute(&self, data: &[u8], buf: &mut [u8]) -> CommandStatus {
+            pub fn execute(
+                &self,
+                data: &crate::device::RequestData,
+                buf: &mut crate::device::ResponseData,
+            ) -> CommandStatus {
                 match *self {
                     $(
                         $name::$var => crate::commands::execute::<$cmd>(data, buf),