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#[cfg(feature = "NSString")]
use core::fmt;
use core::panic::{RefUnwindSafe, UnwindSafe};
use objc2::encode::{Encode, Encoding, RefEncode};
use objc2::rc::{Allocated, Id};
use objc2::{extern_methods, ClassType};
use crate::Foundation::NSUUID;
impl UnwindSafe for NSUUID {}
impl RefUnwindSafe for NSUUID {}
/// The headers describe `initWithUUIDBytes:` and `getUUIDBytes:` as
/// taking `uuid_t`, but something fishy is going on, in reality they
/// expect a reference to these!
///
/// Hence we create this newtype to change the encoding.
#[repr(transparent)]
struct UuidBytes([u8; 16]);
unsafe impl RefEncode for UuidBytes {
const ENCODING_REF: Encoding = if cfg!(target_arch = "aarch64") {
Encoding::String
} else {
Encoding::Array(16, &u8::ENCODING)
};
}
extern_methods!(
unsafe impl NSUUID {
#[method_id(initWithUUIDBytes:)]
fn initWithUUIDBytes(this: Allocated<Self>, bytes: &UuidBytes) -> Id<Self>;
#[method(getUUIDBytes:)]
fn getUUIDBytes(&self, bytes: &mut UuidBytes);
}
);
impl NSUUID {
/// The 'nil UUID'.
pub fn nil() -> Id<Self> {
Self::from_bytes([0; 16])
}
/// Create a new `NSUUID` from the given bytes.
///
///
/// # Example
///
/// Create a new `NSUUID` from the `uuid` crate.
///
/// ```ignore
/// use uuid::Uuid;
/// use objc2_foundation::NSUUID;
///
/// let uuid: Uuid;
/// # uuid = todo!();
/// let obj = NSUUID::from_bytes(uuid.into_bytes());
/// assert_eq!(obj.as_bytes(), uuid.into_bytes());
/// ```
pub fn from_bytes(bytes: [u8; 16]) -> Id<Self> {
let bytes = UuidBytes(bytes);
Self::initWithUUIDBytes(Self::alloc(), &bytes)
}
#[cfg(feature = "NSString")]
pub fn from_string(string: &crate::NSString) -> Option<Id<Self>> {
Self::initWithUUIDString(Self::alloc(), string)
}
pub fn as_bytes(&self) -> [u8; 16] {
let mut bytes = UuidBytes([0; 16]);
self.getUUIDBytes(&mut bytes);
bytes.0
}
}
#[cfg(feature = "NSString")]
impl fmt::Display for NSUUID {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(&self.UUIDString(), f)
}
}
#[cfg(feature = "NSString")]
impl fmt::Debug for NSUUID {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
// The `uuid` crate does `Debug` and `Display` equally, and so do we
fmt::Display::fmt(&self.UUIDString(), f)
}
}
// UUID `compare:` is broken for some reason?
// impl PartialOrd for NSUUID {
// #[inline]
// fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
// Some(self.cmp(other))
// }
// }
// impl Ord for NSUUID {
// fn cmp(&self, other: &Self) -> cmp::Ordering {
// let res: NSComparisonResult = unsafe { msg_send![self, compare: other] };
// res.into()
// }
// }