Merging upstream version 1.74.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 91 insertions, 0 deletions

diff --git a/vendor/windows-metadata/src/row.rs b/vendor/windows-metadata/src/row.rs
new file mode 100644
index 000000000..4e0c30593
--- /dev/null
+++ b/vendor/windows-metadata/src/row.rs
@@ -0,0 +1,91 @@
+#[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Debug)]
+pub struct Row {
+    pub row: usize,
+    pub file: usize,
+}
+
+impl Row {
+    pub fn new(row: usize, file: usize) -> Self {
+        Self { row, file }
+    }
+
+    fn next(&self) -> Self {
+        Self { row: self.row + 1, file: self.file }
+    }
+}
+
+pub trait AsRow: Copy {
+    const TABLE: usize;
+    fn to_row(&self) -> Row;
+    fn from_row(row: Row) -> Self;
+
+    fn file(&self) -> usize {
+        self.to_row().file
+    }
+
+    fn index(&self) -> usize {
+        self.to_row().row
+    }
+
+    fn next(&self) -> Self {
+        Self::from_row(self.to_row().next())
+    }
+}
+
+pub struct RowIterator<R: AsRow> {
+    file: usize,
+    rows: std::ops::Range<usize>,
+    phantom: std::marker::PhantomData<R>,
+}
+
+impl<R: AsRow> RowIterator<R> {
+    pub fn new(file: usize, rows: std::ops::Range<usize>) -> Self {
+        Self { file, rows, phantom: std::marker::PhantomData }
+    }
+}
+
+impl<R: AsRow> Iterator for RowIterator<R> {
+    type Item = R;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.rows.next().map(|row| R::from_row(Row::new(row, self.file)))
+    }
+}
+
+macro_rules! tables {
+    ($(($name:ident, $table:literal))+) => {
+        $(
+        #[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Debug)]
+        pub struct $name(pub(crate) Row);
+        impl AsRow for $name {
+            const TABLE: usize = $table;
+            fn to_row(&self) -> Row {
+                self.0
+            }
+            fn from_row(row: Row) -> Self {
+                $name(row)
+            }
+        }
+    )*
+};
+}
+
+tables! {
+    (Attribute, 1)
+    (ClassLayout, 16)
+    (Constant, 0)
+    (Field, 2)
+    (GenericParam, 3)
+    (ImplMap, 11)
+    (InterfaceImpl, 4)
+    (MemberRef, 5)
+    (MethodDef, 6)
+    (Module, 14)
+    (ModuleRef, 12)
+    (AssemblyRef, 15)
+    (Param, 7)
+    (TypeDef, 8)
+    (TypeRef, 9)
+    (TypeSpec, 10)
+    (NestedClass, 13)
+}