Add mouse and clean virtio

crates/bytes-struct/src/lib.rs

@@ -0,0 +1,70 @@
+use core::iter::Iterator;
+
+use proc_macro::TokenStream;
+use quote::{format_ident, quote};
+use syn::{Meta, parse_macro_input, spanned::Spanned};
+
+#[proc_macro_derive(VolatilePackedStruct, attributes(read_only))]
+pub fn derive_volatile_packed_struct(item: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(item as syn::DeriveInput);
+
+    if !input.attrs.iter().any(|attr| match &attr.meta {
+        Meta::List(list) => list.path.segments.last().is_some_and(|s| s.ident == "repr"),
+        _ => false,
+    }) {
+        return syn::Error::new(
+            input.span(),
+            "Item should use a #[repr(packed)] representation",
+        )
+        .into_compile_error()
+        .into();
+    }
+
+    let fields = match input.data {
+        syn::Data::Struct(data_struct) => match data_struct.fields {
+            syn::Fields::Named(fields_named) => fields_named,
+            syn::Fields::Unnamed(_) | syn::Fields::Unit => unimplemented!(),
+        },
+        syn::Data::Enum(_) => unimplemented!(),
+        syn::Data::Union(_) => unimplemented!(),
+    };
+
+    let mut getters = Vec::new();
+    let mut setters = Vec::new();
+
+    for field in fields.named {
+        let field_name = field.ident.unwrap();
+        if field_name.to_string().starts_with("_") {
+            continue;
+        }
+        let ty = field.ty;
+        let getter_name = format_ident!("get_{}", field_name);
+        let setter_name = format_ident!("set_{}", field_name);
+
+        getters.push(quote! {
+            pub fn #getter_name(self: *const Self) -> #ty {
+                unsafe {
+                    (&raw const (*self).#field_name).read_volatile()
+                }
+            }
+        });
+        setters.push(quote! {
+            pub fn #setter_name(self: *mut Self, value: #ty) {
+                unsafe {
+                    (&raw mut (*self).#field_name).write_volatile(value);
+                }
+            }
+        });
+    }
+
+    let struct_path = input.ident;
+    let (impl_generics, type_generics, where_clause) = input.generics.split_for_impl();
+
+    quote! {
+        impl #impl_generics #struct_path #type_generics #where_clause {
+            #(#getters)*
+            #(#setters)*
+        }
+    }
+    .into()
+}