1 files changed, 137 insertions, 0 deletions
diff --git a/libbindgen/src/ir/enum_ty.rs b/libbindgen/src/ir/enum_ty.rs
new file mode 100644
index 00000000..6085833d
--- /dev/null
+++ b/libbindgen/src/ir/enum_ty.rs
@@ -0,0 +1,137 @@
+//! Intermediate representation for C/C++ enumerations.
+
+use clang;
+use parse::{ClangItemParser, ParseError};
+use super::context::{BindgenContext, ItemId};
+use super::item::Item;
+use super::ty::TypeKind;
+
+/// A C/C++ enumeration.
+#[derive(Debug)]
+pub struct Enum {
+    /// The representation used for this enum; it should be an `IntKind` type or
+    /// an alias to one.
+    ///
+    /// It's `None` if the enum is a forward declaration and isn't defined
+    /// anywhere else, see `tests/headers/func_ptr_in_struct.h`.
+    repr: Option<ItemId>,
+
+    /// The different variants, with explicit values.
+    variants: Vec<EnumVariant>,
+}
+
+impl Enum {
+    /// Construct a new `Enum` with the given representation and variants.
+    pub fn new(repr: Option<ItemId>, variants: Vec<EnumVariant>) -> Self {
+        Enum {
+            repr: repr,
+            variants: variants,
+        }
+    }
+
+    /// Get this enumeration's representation.
+    pub fn repr(&self) -> Option<ItemId> {
+        self.repr
+    }
+
+    /// Get this enumeration's variants.
+    pub fn variants(&self) -> &[EnumVariant] {
+        &self.variants
+    }
+
+    /// Construct an enumeration from the given Clang type.
+    pub fn from_ty(ty: &clang::Type,
+                   ctx: &mut BindgenContext)
+                   -> Result<Self, ParseError> {
+        use clangll::*;
+        if ty.kind() != CXType_Enum {
+            return Err(ParseError::Continue);
+        }
+
+        let declaration = ty.declaration().canonical();
+        let repr = Item::from_ty(&declaration.enum_type(), None, None, ctx)
+            .ok();
+        let mut variants = vec![];
+
+        let is_signed = match repr {
+            Some(repr) => {
+                let repr_type = ctx.resolve_type(repr);
+                match *repr_type.canonical_type(ctx).kind() {
+                    TypeKind::Int(ref int_kind) => int_kind.is_signed(),
+                    ref other => {
+                        panic!("Since when enums can be non-integers? {:?}",
+                               other)
+                    }
+                }
+            }
+            // Assume signedness since the default type by the C
+            // standard is an
+            // int.
+            None => true,
+        };
+
+        declaration.visit(|cursor| {
+            if cursor.kind() == CXCursor_EnumConstantDecl {
+                let value = if is_signed {
+                    cursor.enum_val_signed().map(EnumVariantValue::Signed)
+                } else {
+                    cursor.enum_val_unsigned().map(EnumVariantValue::Unsigned)
+                };
+                if let Some(val) = value {
+                    let name = cursor.spelling();
+                    let comment = cursor.raw_comment();
+                    variants.push(EnumVariant::new(name, comment, val));
+                }
+            }
+            CXChildVisit_Continue
+        });
+        Ok(Enum::new(repr, variants))
+    }
+}
+
+/// A single enum variant, to be contained only in an enum.
+#[derive(Debug)]
+pub struct EnumVariant {
+    /// The name of the variant.
+    name: String,
+
+    /// An optional doc comment.
+    comment: Option<String>,
+
+    /// The integer value of the variant.
+    val: EnumVariantValue,
+}
+
+/// A constant value assigned to an enumeration variant.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum EnumVariantValue {
+    /// A signed constant.
+    Signed(i64),
+
+    /// An unsigned constant.
+    Unsigned(u64),
+}
+
+impl EnumVariant {
+    /// Construct a new enumeration variant from the given parts.
+    pub fn new(name: String,
+               comment: Option<String>,
+               val: EnumVariantValue)
+               -> Self {
+        EnumVariant {
+            name: name,
+            comment: comment,
+            val: val,
+        }
+    }
+
+    /// Get this variant's name.
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
+    /// Get this variant's value.
+    pub fn val(&self) -> EnumVariantValue {
+        self.val
+    }
+}