1 files changed, 77 insertions, 0 deletions
diff --git a/bzipper_macros/src/impls/serialise_struct.rs b/bzipper_macros/src/impls/serialise_struct.rs
new file mode 100644
index 0000000..308a6bb
--- /dev/null
+++ b/bzipper_macros/src/impls/serialise_struct.rs
@@ -0,0 +1,77 @@
+// Copyright 2024 Gabriel Bjørnager Jensen.
+//
+// This file is part of bzipper.
+//
+// bzipper is free software: you can redistribute
+// it and/or modify it under the terms of the GNU
+// Lesser General Public License as published by
+// the Free Software Foundation, either version 3
+// of the License, or (at your option) any later
+// version.
+//
+// bzipper is distributed in the hope that it will
+// be useful, but WITHOUT ANY WARRANTY; without
+// even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Less-
+// er General Public License along with bzipper. If
+// not, see <https://www.gnu.org/licenses/>.
+
+use proc_macro2::{Span, TokenStream};
+use quote::{quote, ToTokens};
+use syn::{
+ DataStruct,
+ Fields,
+ Index,
+ Token,
+ punctuated::Punctuated
+};
+
+#[must_use]
+pub fn serialise_struct(data: &DataStruct) -> TokenStream {
+ if matches!(data.fields, Fields::Unit) {
+ quote! {
+ const SERIALISED_SIZE: usize = 0x0;
+
+ #[inline(always)]
+ fn serialise(&self, buf: &mut [u8]) -> ::bzipper::Result<()> {
+ ::core::debug_assert_eq!(buf.len(), Self::SERIALISED_SIZE);
+
+ Ok(())
+ }
+ }
+ } else {
+ let mut serialised_size = Punctuated::<TokenStream, Token![+]>::new();
+ let mut chain_commands = Punctuated::<TokenStream, Token![;]>::new();
+
+ for (index, field) in data.fields.iter().enumerate() {
+ let ty = &field.ty;
+
+ let name = field.ident
+ .as_ref()
+ .map_or_else(|| Index::from(index).to_token_stream(), ToTokens::to_token_stream);
+
+ serialised_size.push(quote! { <#ty as ::bzipper::Serialise>::SERIALISED_SIZE });
+
+ chain_commands.push(quote! { stream.append(&self.#name)? });
+ }
+
+ chain_commands.push_punct(Token![;](Span::call_site()));
+
+ quote! {
+ const SERIALISED_SIZE: usize = #serialised_size;
+
+ fn serialise(&self, buf: &mut [u8]) -> ::bzipper::Result<()> {
+ ::core::debug_assert_eq!(buf.len(), Self::SERIALISED_SIZE);
+
+ let mut stream = ::bzipper::Sstream::new(buf);
+
+ #chain_commands
+
+ Ok(())
+ }
+ }
+ }
+}