Simplify as_mut_bytes

Author: cesarb

src/as_mut_bytes.rs renamed to src/as_bytes.rs

@@ -27,24 +27,27 @@
 use std::mem;
 use std::slice;
 
-pub trait AsMutBytes {
+pub trait AsBytes {
+    fn as_bytes(&self) -> &[u8];
     fn as_mut_bytes(&mut self) -> &mut [u8];
 }
 
-macro_rules! as_mut_bytes_impl {
-    ($t:ty) => {
-        impl AsMutBytes for $t {
-            #[inline]
-            fn as_mut_bytes(&mut self) -> &mut [u8] {
-                unsafe {
-                    slice::from_raw_parts_mut(
-                        self.as_mut_ptr() as *mut u8,
-                        mem::size_of::<Self>())
-                }
-            }
+impl<T> AsBytes for [T] {
+    #[inline]
+    fn as_bytes(&self) -> &[u8] {
+        unsafe {
+            slice::from_raw_parts(
+                self.as_ptr() as *const u8,
+                self.len() * mem::size_of::<T>())
         }
     }
-}
 
-as_mut_bytes_impl!([u32; 16]);
-as_mut_bytes_impl!([u64; 16]);
+    #[inline]
+    fn as_mut_bytes(&mut self) -> &mut [u8] {
+        unsafe {
+            slice::from_raw_parts_mut(
+                self.as_mut_ptr() as *mut u8,
+                self.len() * mem::size_of::<T>())
+        }
+    }
+}

src/blake2.rs

@@ -47,7 +47,7 @@ macro_rules! blake2_impl {
         use std::mem;
         use std::slice;
 
-        use $crate::as_mut_bytes::AsMutBytes;
+        use $crate::as_bytes::AsBytes;
         use $crate::bytes::{MutableByteVector, copy_memory};
         use $crate::constant_time_eq::constant_time_eq;
         use $crate::simd::{Vector, $vec};

src/lib.rs

@@ -36,7 +36,7 @@ extern crate constant_time_eq;
 
 #[cfg(feature = "simd")] extern crate simdty;
 
-mod as_mut_bytes;
+mod as_bytes;
 mod bytes;
 mod simd;