Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/wasi-common/wig/src/lib.rs

@@ -0,0 +1,34 @@
+extern crate proc_macro;
+extern crate proc_macro2;
+extern crate quote;
+extern crate witx;
+
+mod raw_types;
+mod utils;
+
+use proc_macro::TokenStream;
+use proc_macro2::TokenStream as TokenStream2;
+
+#[proc_macro]
+pub fn witx_host_types(args: TokenStream) -> TokenStream {
+    TokenStream::from(raw_types::gen(
+        TokenStream2::from(args),
+        raw_types::Mode::Host,
+    ))
+}
+
+#[proc_macro]
+pub fn witx_wasi_types(args: TokenStream) -> TokenStream {
+    TokenStream::from(raw_types::gen(
+        TokenStream2::from(args),
+        raw_types::Mode::Wasi,
+    ))
+}
+
+#[proc_macro]
+pub fn witx_wasi32_types(args: TokenStream) -> TokenStream {
+    TokenStream::from(raw_types::gen(
+        TokenStream2::from(args),
+        raw_types::Mode::Wasi32,
+    ))
+}