Vendor things

third-party/vendor/objc-sys/src/image_info.rs

@@ -0,0 +1,45 @@
+#[repr(C)]
+#[doc(hidden)] // Private for now
+pub struct __ImageInfo {
+    // These are not actually `unsigned int`, even though the docs say so
+    /// The version of the image info struct.
+    version: u32,
+    flags: u32,
+}
+
+#[allow(unused)]
+impl __ImageInfo {
+    /// Unused
+    const FIX_AND_CONTINUE: u32 = 1 << 0;
+    const SUPPORTS_GARBAGE_COLLECTED: u32 = 1 << 1;
+    const REQUIRES_GARBAGE_COLLECTION: u32 = 1 << 2;
+    const OPTIMIZED_BY_DYLD: u32 = 1 << 3; // TODO
+    /// Unused
+    const CORRECTED_SYNTHESIZE: u32 = 1 << 4;
+    /// Whether we're compiling this to run on a simulator.
+    const IMAGE_IS_SIMULATED: u32 = 1 << 5;
+    /// Whether we are generating class properties.
+    const CLASS_PROPERTIES: u32 = 1 << 6;
+    const DYLD_PREOPTIMIZED: u32 = 1 << 7;
+
+    const SWIFT_ABI_VERSION_SHIFT: u32 = 8;
+    const SWIFT_ABI_VERSION_MASK: u32 = 0xff << Self::SWIFT_ABI_VERSION_SHIFT;
+    const SWIFT_MINOR_VERSION_SHIFT: u32 = 16;
+    const SWIFT_MINOR_VERSION_MASK: u32 = 0xff << Self::SWIFT_MINOR_VERSION_SHIFT;
+    const SWIFT_MAJOR_VERSION_SHIFT: u32 = 24;
+    const SWIFT_MAJOR_VERSION_MASK: u32 = 0xff << Self::SWIFT_MAJOR_VERSION_SHIFT;
+
+    /// Fetches the image info for the current runtime + target combination
+    #[inline]
+    pub const fn system() -> Self {
+        // We don't currently do anything relating to class properties, but
+        // let's just mimic what Clang does!
+        let mut flags = Self::CLASS_PROPERTIES;
+
+        if cfg!(target_simulator) {
+            flags |= Self::IMAGE_IS_SIMULATED;
+        }
+
+        Self { version: 0, flags }
+    }
+}