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//! Converting between Windows GUIDs and UUIDs.
//!
//! Windows GUIDs are specified as using mixed endianness.
//! What you get will depend on the source of the GUID.
//! Functions like `CoCreateGuid` will generate a valid UUID so
//! the fields will be naturally ordered for `Uuid::from_fields`.
//! Other GUIDs might need to be passed to `Uuid::from_fields_le`
//! to have their ordering swapped.
#[test]
#[cfg(windows)]
fn guid_to_uuid() {
use uuid::Uuid;
use windows_sys::core;
let guid_in = core::GUID {
data1: 0x4a35229d,
data2: 0x5527,
data3: 0x4f30,
data4: [0x86, 0x47, 0x9d, 0xc5, 0x4e, 0x1e, 0xe1, 0xe8],
};
let uuid = Uuid::from_fields(guid_in.data1, guid_in.data2, guid_in.data3, &guid_in.data4);
let guid_out = {
let fields = uuid.as_fields();
core::GUID {
data1: fields.0,
data2: fields.1,
data3: fields.2,
data4: *fields.3,
}
};
assert_eq!(
(guid_in.data1, guid_in.data2, guid_in.data3, guid_in.data4),
(
guid_out.data1,
guid_out.data2,
guid_out.data3,
guid_out.data4
)
);
}
#[test]
#[cfg(windows)]
fn guid_to_uuid_le_encoded() {
use uuid::Uuid;
use windows_sys::core;
// A GUID might not be encoded directly as a UUID
// If its fields are stored in little-endian order they might
// need to be flipped. Whether or not this is necessary depends
// on the source of the GUID
let guid_in = core::GUID {
data1: 0x9d22354a,
data2: 0x2755,
data3: 0x304f,
data4: [0x86, 0x47, 0x9d, 0xc5, 0x4e, 0x1e, 0xe1, 0xe8],
};
let uuid = Uuid::from_fields_le(guid_in.data1, guid_in.data2, guid_in.data3, &guid_in.data4);
let guid_out = {
let fields = uuid.to_fields_le();
core::GUID {
data1: fields.0,
data2: fields.1,
data3: fields.2,
data4: *fields.3,
}
};
assert_eq!(
(guid_in.data1, guid_in.data2, guid_in.data3, guid_in.data4),
(
guid_out.data1,
guid_out.data2,
guid_out.data3,
guid_out.data4
)
);
}
#[test]
#[cfg(windows)]
fn uuid_from_cocreateguid() {
use uuid::{Uuid, Variant, Version};
use windows_sys::core;
use windows_sys::Win32::System::Com::CoCreateGuid;
let mut guid = core::GUID {
data1: 0,
data2: 0,
data3: 0,
data4: [0u8; 8],
};
unsafe {
CoCreateGuid(&mut guid);
}
let uuid = Uuid::from_fields(guid.data1, guid.data2, guid.data3, &guid.data4);
assert_eq!(Variant::RFC4122, uuid.get_variant());
assert_eq!(Some(Version::Random), uuid.get_version());
}
fn main() {}