objrs_runtime 0.0.2

// The contents of this file is licensed by its authors and copyright holders under the Apache
// License (Version 2.0), MIT license, or Mozilla Public License (Version 2.0), at your option. The
// contents of this file may not be copied, modified, or distributed except according to those
// terms. See the COPYRIGHT file at the top-level directory of this distribution for copies of these
// licenses and more information.

// See https://github.com/opensource-apple/objc4/blob/master/runtime/objc-abi.h

use objc_runtime_new;

#[link(name = "objc")]
extern "C" {
  #[link_name = "_objc_empty_cache"]
  pub static _objc_empty_cache: objc_runtime_new::bucket_t;

  // These take a message::objc_super parameter instead of self.
  pub fn objc_msgSendSuper2();
  #[cfg(not(target_arch = "aarch64"))]
  pub fn objc_msgSendSuper2_stret();
}

#[repr(C)]
#[allow(non_camel_case_types)]
pub struct objc_image_info {
  version: u32,
  flags: u32,
}

const IS_IOS_SIMULATOR: bool =
  cfg!(all(target_os = "ios", any(target_arch = "x86", target_arch = "x86_64")));

// For flag values, see:
// https://github.com/apple-opensource/ld64/blob/master/src/other/objcimageinfo.cpp
// https://github.com/opensource-apple/objc4/blob/master/runtime/objc-abi.h
// https://github.com/llvm-mirror/clang/blob/master/lib/CodeGen/CGObjCMac.cpp
// https://github.com/opensource-apple/objc4/blob/master/test/unload3.c
const FLAGS_CLASS_PROPERTIES: u32 = 64;
const FLAGS_IS_SIMULATOR: u32 = 32;

impl objc_image_info {
  pub const DEFAULT: objc_image_info = objc_image_info {
    version: 0,
    flags: FLAGS_CLASS_PROPERTIES | (FLAGS_IS_SIMULATOR * IS_IOS_SIMULATOR as u32),
  };
}