Improve definition of CFBase types

Specifically CFTypeID, CFOptionFlags, CFHashCode and CFIndex, these can
(and should) all be isize/usize instead of c_long/c_ulong.

Part of #556.

framework-crates/objc2-core-foundation/src/base.rs

@@ -0,0 +1,51 @@
+// The header `CoreFoundation/CFBase.h` contains:
+//
+// #if defined(__WIN64__) && !defined(__LLP64__)
+// #define __LLP64__ 1
+// #endif
+//
+// #if __LLP64__
+// typedef unsigned long long CFTypeID;
+// typedef unsigned long long CFOptionFlags;
+// typedef unsigned long long CFHashCode;
+// typedef signed long long CFIndex;
+// #else
+// typedef unsigned long CFTypeID;
+// typedef unsigned long CFOptionFlags;
+// typedef unsigned long CFHashCode;
+// typedef signed long CFIndex;
+// #endif
+//
+// Looking at the corresponding Rust definitions for longs:
+// <https://doc.rust-lang.org/1.83.0/src/core/ffi/mod.rs.html#168-179>
+// cfg_if! {
+//     if #[cfg(all(target_pointer_width = "64", not(windows)))] {
+//         pub type c_long = i64;
+//         pub type c_ulong = u64;
+//     } else {
+//         // The minimal size of `long` in the C standard is 32 bits
+//         pub type c_long = i32;
+//         pub type c_ulong = u32;
+//     }
+// }
+// <https://doc.rust-lang.org/1.83.0/src/core/ffi/mod.rs.html#65-66>
+// pub type c_longlong = i64;
+// pub type c_ulonglong = u64;
+//
+// It becomes easy to convince ourselves that combined, these amount to making
+// these types be 32-bit on systems with 32-bit pointers and 64-bit on systems
+// with 64-bit pointers.
+//
+// That means we can use `isize`/`usize`, which is more ergonomic.
+
+/// [Apple's documentation](https://developer.apple.com/documentation/corefoundation/cftypeid?language=objc)
+pub type CFTypeID = usize;
+
+/// [Apple's documentation](https://developer.apple.com/documentation/corefoundation/cfoptionflags?language=objc)
+pub type CFOptionFlags = usize;
+
+/// [Apple's documentation](https://developer.apple.com/documentation/corefoundation/cfhashcode?language=objc)
+pub type CFHashCode = usize;
+
+/// [Apple's documentation](https://developer.apple.com/documentation/corefoundation/cfindex?language=objc)
+pub type CFIndex = isize;

framework-crates/objc2-core-foundation/src/lib.rs

@@ -15,12 +15,16 @@ extern crate alloc;
 #[cfg(feature = "std")]
 extern crate std;
 
+#[cfg(feature = "CFBase")]
+mod base;
 #[cfg(feature = "CFBundle")]
 mod bundle;
 mod generated;
 #[cfg(feature = "CFCGTypes")]
 mod geometry;
 
+#[cfg(feature = "CFBase")]
+pub use self::base::*;
 #[cfg(feature = "CFBundle")]
 pub use self::bundle::CFBundleRefNum;
 #[allow(unused_imports, unreachable_pub)]

framework-crates/objc2-core-foundation/translation-config.toml

@@ -50,3 +50,7 @@ fn.__CFStringMakeConstantString.skipped = true
 
 # Differs based on architecture
 typedef.CFBundleRefNum.skipped = true
+typedef.CFTypeID.skipped = true
+typedef.CFOptionFlags.skipped = true
+typedef.CFHashCode.skipped = true
+typedef.CFIndex.skipped = true