rust: rename qemu_api_macros -> qemu_macros

Since "qemu_api" is no longer the unique crate to provide APIs.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-17-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 415 deletions

diff --git a/rust/qemu-api-macros/src/lib.rs b/rust/qemu-api-macros/src/lib.rs
deleted file mode 100644
index 830b432698..0000000000
--- a/rust/qemu-api-macros/src/lib.rs
+++ /dev/null
@@ -1,415 +0,0 @@
-// Copyright 2024, Linaro Limited
-// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-use proc_macro::TokenStream;
-use quote::{quote, quote_spanned, ToTokens};
-use syn::{
-    parse::Parse, parse_macro_input, parse_quote, punctuated::Punctuated, spanned::Spanned,
-    token::Comma, Data, DeriveInput, Error, Field, Fields, FieldsUnnamed, Ident, Meta, Path, Token,
-    Variant,
-};
-mod bits;
-use bits::BitsConstInternal;
-
-#[cfg(test)]
-mod tests;
-
-fn get_fields<'a>(
-    input: &'a DeriveInput,
-    msg: &str,
-) -> Result<&'a Punctuated<Field, Comma>, Error> {
-    let Data::Struct(ref s) = &input.data else {
-        return Err(Error::new(
-            input.ident.span(),
-            format!("Struct required for {msg}"),
-        ));
-    };
-    let Fields::Named(ref fs) = &s.fields else {
-        return Err(Error::new(
-            input.ident.span(),
-            format!("Named fields required for {msg}"),
-        ));
-    };
-    Ok(&fs.named)
-}
-
-fn get_unnamed_field<'a>(input: &'a DeriveInput, msg: &str) -> Result<&'a Field, Error> {
-    let Data::Struct(ref s) = &input.data else {
-        return Err(Error::new(
-            input.ident.span(),
-            format!("Struct required for {msg}"),
-        ));
-    };
-    let Fields::Unnamed(FieldsUnnamed { ref unnamed, .. }) = &s.fields else {
-        return Err(Error::new(
-            s.fields.span(),
-            format!("Tuple struct required for {msg}"),
-        ));
-    };
-    if unnamed.len() != 1 {
-        return Err(Error::new(
-            s.fields.span(),
-            format!("A single field is required for {msg}"),
-        ));
-    }
-    Ok(&unnamed[0])
-}
-
-fn is_c_repr(input: &DeriveInput, msg: &str) -> Result<(), Error> {
-    let expected = parse_quote! { #[repr(C)] };
-
-    if input.attrs.iter().any(|attr| attr == &expected) {
-        Ok(())
-    } else {
-        Err(Error::new(
-            input.ident.span(),
-            format!("#[repr(C)] required for {msg}"),
-        ))
-    }
-}
-
-fn is_transparent_repr(input: &DeriveInput, msg: &str) -> Result<(), Error> {
-    let expected = parse_quote! { #[repr(transparent)] };
-
-    if input.attrs.iter().any(|attr| attr == &expected) {
-        Ok(())
-    } else {
-        Err(Error::new(
-            input.ident.span(),
-            format!("#[repr(transparent)] required for {msg}"),
-        ))
-    }
-}
-
-fn derive_object_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
-    is_c_repr(&input, "#[derive(Object)]")?;
-
-    let name = &input.ident;
-    let parent = &get_fields(&input, "#[derive(Object)]")?
-        .get(0)
-        .ok_or_else(|| {
-            Error::new(
-                input.ident.span(),
-                "#[derive(Object)] requires a parent field",
-            )
-        })?
-        .ident;
-
-    Ok(quote! {
-        ::common::assert_field_type!(#name, #parent,
-            ::qom::ParentField<<#name as ::qom::ObjectImpl>::ParentType>);
-
-        ::util::module_init! {
-            MODULE_INIT_QOM => unsafe {
-                ::qom::type_register_static(&<#name as ::qom::ObjectImpl>::TYPE_INFO);
-            }
-        }
-    })
-}
-
-#[proc_macro_derive(Object)]
-pub fn derive_object(input: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-
-    derive_object_or_error(input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
-
-fn derive_opaque_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
-    is_transparent_repr(&input, "#[derive(Wrapper)]")?;
-
-    let name = &input.ident;
-    let field = &get_unnamed_field(&input, "#[derive(Wrapper)]")?;
-    let typ = &field.ty;
-
-    Ok(quote! {
-        unsafe impl ::common::opaque::Wrapper for #name {
-            type Wrapped = <#typ as ::common::opaque::Wrapper>::Wrapped;
-        }
-        impl #name {
-            pub unsafe fn from_raw<'a>(ptr: *mut <Self as ::common::opaque::Wrapper>::Wrapped) -> &'a Self {
-                let ptr = ::std::ptr::NonNull::new(ptr).unwrap().cast::<Self>();
-                unsafe { ptr.as_ref() }
-            }
-
-            pub const fn as_mut_ptr(&self) -> *mut <Self as ::common::opaque::Wrapper>::Wrapped {
-                self.0.as_mut_ptr()
-            }
-
-            pub const fn as_ptr(&self) -> *const <Self as ::common::opaque::Wrapper>::Wrapped {
-                self.0.as_ptr()
-            }
-
-            pub const fn as_void_ptr(&self) -> *mut ::core::ffi::c_void {
-                self.0.as_void_ptr()
-            }
-
-            pub const fn raw_get(slot: *mut Self) -> *mut <Self as ::common::opaque::Wrapper>::Wrapped {
-                slot.cast()
-            }
-        }
-    })
-}
-
-#[derive(Debug)]
-enum DevicePropertyName {
-    CStr(syn::LitCStr),
-    Str(syn::LitStr),
-}
-
-#[derive(Debug)]
-struct DeviceProperty {
-    rename: Option<DevicePropertyName>,
-    defval: Option<syn::Expr>,
-}
-
-impl Parse for DeviceProperty {
-    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
-        let _: syn::Token![#] = input.parse()?;
-        let bracketed;
-        _ = syn::bracketed!(bracketed in input);
-        let attribute = bracketed.parse::<syn::Ident>()?;
-        debug_assert_eq!(&attribute.to_string(), "property");
-        let mut retval = Self {
-            rename: None,
-            defval: None,
-        };
-        let content;
-        _ = syn::parenthesized!(content in bracketed);
-        while !content.is_empty() {
-            let value: syn::Ident = content.parse()?;
-            if value == "rename" {
-                let _: syn::Token![=] = content.parse()?;
-                if retval.rename.is_some() {
-                    return Err(syn::Error::new(
-                        value.span(),
-                        "`rename` can only be used at most once",
-                    ));
-                }
-                if content.peek(syn::LitStr) {
-                    retval.rename = Some(DevicePropertyName::Str(content.parse::<syn::LitStr>()?));
-                } else {
-                    retval.rename =
-                        Some(DevicePropertyName::CStr(content.parse::<syn::LitCStr>()?));
-                }
-            } else if value == "default" {
-                let _: syn::Token![=] = content.parse()?;
-                if retval.defval.is_some() {
-                    return Err(syn::Error::new(
-                        value.span(),
-                        "`default` can only be used at most once",
-                    ));
-                }
-                retval.defval = Some(content.parse()?);
-            } else {
-                return Err(syn::Error::new(
-                    value.span(),
-                    format!("unrecognized field `{value}`"),
-                ));
-            }
-
-            if !content.is_empty() {
-                let _: syn::Token![,] = content.parse()?;
-            }
-        }
-        Ok(retval)
-    }
-}
-
-#[proc_macro_derive(Device, attributes(property))]
-pub fn derive_device(input: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-
-    derive_device_or_error(input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
-
-fn derive_device_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
-    is_c_repr(&input, "#[derive(Device)]")?;
-    let properties: Vec<(syn::Field, DeviceProperty)> = get_fields(&input, "#[derive(Device)]")?
-        .iter()
-        .flat_map(|f| {
-            f.attrs
-                .iter()
-                .filter(|a| a.path().is_ident("property"))
-                .map(|a| Ok((f.clone(), syn::parse2(a.to_token_stream())?)))
-        })
-        .collect::<Result<Vec<_>, Error>>()?;
-    let name = &input.ident;
-    let mut properties_expanded = vec![];
-
-    for (field, prop) in properties {
-        let DeviceProperty { rename, defval } = prop;
-        let field_name = field.ident.unwrap();
-        macro_rules! str_to_c_str {
-            ($value:expr, $span:expr) => {{
-                let (value, span) = ($value, $span);
-                let cstr = std::ffi::CString::new(value.as_str()).map_err(|err| {
-                    Error::new(
-                        span,
-                        format!(
-                            "Property name `{value}` cannot be represented as a C string: {err}"
-                        ),
-                    )
-                })?;
-                let cstr_lit = syn::LitCStr::new(&cstr, span);
-                Ok(quote! { #cstr_lit })
-            }};
-        }
-
-        let prop_name = rename.map_or_else(
-            || str_to_c_str!(field_name.to_string(), field_name.span()),
-            |rename| -> Result<proc_macro2::TokenStream, Error> {
-                match rename {
-                    DevicePropertyName::CStr(cstr_lit) => Ok(quote! { #cstr_lit }),
-                    DevicePropertyName::Str(str_lit) => {
-                        str_to_c_str!(str_lit.value(), str_lit.span())
-                    }
-                }
-            },
-        )?;
-        let field_ty = field.ty.clone();
-        let qdev_prop = quote! { <#field_ty as ::hwcore::QDevProp>::VALUE };
-        let set_default = defval.is_some();
-        let defval = defval.unwrap_or(syn::Expr::Verbatim(quote! { 0 }));
-        properties_expanded.push(quote! {
-            ::hwcore::bindings::Property {
-                name: ::std::ffi::CStr::as_ptr(#prop_name),
-                info: #qdev_prop ,
-                offset: ::core::mem::offset_of!(#name, #field_name) as isize,
-                set_default: #set_default,
-                defval: ::hwcore::bindings::Property__bindgen_ty_1 { u: #defval as u64 },
-                ..::common::Zeroable::ZERO
-            }
-        });
-    }
-
-    Ok(quote_spanned! {input.span() =>
-        unsafe impl ::hwcore::DevicePropertiesImpl for #name {
-            const PROPERTIES: &'static [::hwcore::bindings::Property] = &[
-                #(#properties_expanded),*
-            ];
-        }
-    })
-}
-
-#[proc_macro_derive(Wrapper)]
-pub fn derive_opaque(input: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-
-    derive_opaque_or_error(input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
-
-#[allow(non_snake_case)]
-fn get_repr_uN(input: &DeriveInput, msg: &str) -> Result<Path, Error> {
-    let repr = input.attrs.iter().find(|attr| attr.path().is_ident("repr"));
-    if let Some(repr) = repr {
-        let nested = repr.parse_args_with(Punctuated::<Meta, Token![,]>::parse_terminated)?;
-        for meta in nested {
-            match meta {
-                Meta::Path(path) if path.is_ident("u8") => return Ok(path),
-                Meta::Path(path) if path.is_ident("u16") => return Ok(path),
-                Meta::Path(path) if path.is_ident("u32") => return Ok(path),
-                Meta::Path(path) if path.is_ident("u64") => return Ok(path),
-                _ => {}
-            }
-        }
-    }
-
-    Err(Error::new(
-        input.ident.span(),
-        format!("#[repr(u8/u16/u32/u64) required for {msg}"),
-    ))
-}
-
-fn get_variants(input: &DeriveInput) -> Result<&Punctuated<Variant, Comma>, Error> {
-    let Data::Enum(ref e) = &input.data else {
-        return Err(Error::new(
-            input.ident.span(),
-            "Cannot derive TryInto for union or struct.",
-        ));
-    };
-    if let Some(v) = e.variants.iter().find(|v| v.fields != Fields::Unit) {
-        return Err(Error::new(
-            v.fields.span(),
-            "Cannot derive TryInto for enum with non-unit variants.",
-        ));
-    }
-    Ok(&e.variants)
-}
-
-#[rustfmt::skip::macros(quote)]
-fn derive_tryinto_body(
-    name: &Ident,
-    variants: &Punctuated<Variant, Comma>,
-    repr: &Path,
-) -> Result<proc_macro2::TokenStream, Error> {
-    let discriminants: Vec<&Ident> = variants.iter().map(|f| &f.ident).collect();
-
-    Ok(quote! {
-        #(const #discriminants: #repr = #name::#discriminants as #repr;)*
-        match value {
-            #(#discriminants => core::result::Result::Ok(#name::#discriminants),)*
-            _ => core::result::Result::Err(value),
-        }
-    })
-}
-
-#[rustfmt::skip::macros(quote)]
-fn derive_tryinto_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
-    let repr = get_repr_uN(&input, "#[derive(TryInto)]")?;
-    let name = &input.ident;
-    let body = derive_tryinto_body(name, get_variants(&input)?, &repr)?;
-    let errmsg = format!("invalid value for {name}");
-
-    Ok(quote! {
-        impl #name {
-            #[allow(dead_code)]
-            pub const fn into_bits(self) -> #repr {
-                self as #repr
-            }
-
-            #[allow(dead_code)]
-            pub const fn from_bits(value: #repr) -> Self {
-                match ({
-                    #body
-                }) {
-                    Ok(x) => x,
-                    Err(_) => panic!(#errmsg),
-                }
-            }
-        }
-        impl core::convert::TryFrom<#repr> for #name {
-            type Error = #repr;
-
-            #[allow(ambiguous_associated_items)]
-            fn try_from(value: #repr) -> Result<Self, #repr> {
-                #body
-            }
-        }
-    })
-}
-
-#[proc_macro_derive(TryInto)]
-pub fn derive_tryinto(input: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-
-    derive_tryinto_or_error(input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
-
-#[proc_macro]
-pub fn bits_const_internal(ts: TokenStream) -> TokenStream {
-    let ts = proc_macro2::TokenStream::from(ts);
-    let mut it = ts.into_iter();
-
-    BitsConstInternal::parse(&mut it)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}