| #![allow(clippy::many_single_char_names)] |
| |
| use super::*; |
| |
| /// A globally unique identifier ([GUID](https://docs.microsoft.com/en-us/windows/win32/api/guiddef/ns-guiddef-guid)) |
| /// used to identify COM and WinRT interfaces. |
| #[repr(C)] |
| #[derive(Clone, Copy, Default, PartialEq, Eq, Hash)] |
| pub struct GUID { |
| pub data1: u32, |
| pub data2: u16, |
| pub data3: u16, |
| pub data4: [u8; 8], |
| } |
| |
| impl GUID { |
| /// Creates a unique `GUID` value. |
| pub fn new() -> Result<Self> { |
| unsafe { imp::CoCreateGuid() } |
| } |
| |
| /// Creates a `GUID` represented by the all-zero byte-pattern. |
| pub const fn zeroed() -> Self { |
| Self { data1: 0, data2: 0, data3: 0, data4: [0, 0, 0, 0, 0, 0, 0, 0] } |
| } |
| |
| /// Creates a `GUID` with the given constant values. |
| pub const fn from_values(data1: u32, data2: u16, data3: u16, data4: [u8; 8]) -> Self { |
| Self { data1, data2, data3, data4 } |
| } |
| |
| /// Creates a `GUID` from a `u128` value. |
| pub const fn from_u128(uuid: u128) -> Self { |
| Self { data1: (uuid >> 96) as u32, data2: (uuid >> 80 & 0xffff) as u16, data3: (uuid >> 64 & 0xffff) as u16, data4: (uuid as u64).to_be_bytes() } |
| } |
| |
| /// Converts a `GUID` to a `u128` value. |
| pub const fn to_u128(&self) -> u128 { |
| ((self.data1 as u128) << 96) + ((self.data2 as u128) << 80) + ((self.data3 as u128) << 64) + u64::from_be_bytes(self.data4) as u128 |
| } |
| |
| /// Creates a `GUID` for a "generic" WinRT type. |
| pub const fn from_signature(signature: imp::ConstBuffer) -> Self { |
| let data = imp::ConstBuffer::from_slice(&[0x11, 0xf4, 0x7a, 0xd5, 0x7b, 0x73, 0x42, 0xc0, 0xab, 0xae, 0x87, 0x8b, 0x1e, 0x16, 0xad, 0xee]); |
| |
| let data = data.push_other(signature); |
| |
| let bytes = imp::sha1(&data).bytes(); |
| let first = u32::from_be_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]); |
| |
| let second = u16::from_be_bytes([bytes[4], bytes[5]]); |
| let mut third = u16::from_be_bytes([bytes[6], bytes[7]]); |
| third = (third & 0x0fff) | (5 << 12); |
| let fourth = (bytes[8] & 0x3f) | 0x80; |
| |
| Self::from_values(first, second, third, [fourth, bytes[9], bytes[10], bytes[11], bytes[12], bytes[13], bytes[14], bytes[15]]) |
| } |
| } |
| |
| impl RuntimeType for GUID { |
| const SIGNATURE: imp::ConstBuffer = imp::ConstBuffer::from_slice(b"g16"); |
| } |
| |
| impl TypeKind for GUID { |
| type TypeKind = CopyType; |
| } |
| |
| impl std::fmt::Debug for GUID { |
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { |
| write!(f, "{:08X?}-{:04X?}-{:04X?}-{:02X?}{:02X?}-{:02X?}{:02X?}{:02X?}{:02X?}{:02X?}{:02X?}", self.data1, self.data2, self.data3, self.data4[0], self.data4[1], self.data4[2], self.data4[3], self.data4[4], self.data4[5], self.data4[6], self.data4[7]) |
| } |
| } |
| |
| impl std::convert::From<&str> for GUID { |
| fn from(value: &str) -> Self { |
| assert!(value.len() == 36, "Invalid GUID string"); |
| let mut bytes = value.bytes(); |
| |
| let a = ((bytes.next_u32() * 16 + bytes.next_u32()) << 24) + ((bytes.next_u32() * 16 + bytes.next_u32()) << 16) + ((bytes.next_u32() * 16 + bytes.next_u32()) << 8) + bytes.next_u32() * 16 + bytes.next_u32(); |
| assert!(bytes.next().unwrap() == b'-', "Invalid GUID string"); |
| let b = ((bytes.next_u16() * 16 + (bytes.next_u16())) << 8) + bytes.next_u16() * 16 + bytes.next_u16(); |
| assert!(bytes.next().unwrap() == b'-', "Invalid GUID string"); |
| let c = ((bytes.next_u16() * 16 + bytes.next_u16()) << 8) + bytes.next_u16() * 16 + bytes.next_u16(); |
| assert!(bytes.next().unwrap() == b'-', "Invalid GUID string"); |
| let d = bytes.next_u8() * 16 + bytes.next_u8(); |
| let e = bytes.next_u8() * 16 + bytes.next_u8(); |
| assert!(bytes.next().unwrap() == b'-', "Invalid GUID string"); |
| |
| let f = bytes.next_u8() * 16 + bytes.next_u8(); |
| let g = bytes.next_u8() * 16 + bytes.next_u8(); |
| let h = bytes.next_u8() * 16 + bytes.next_u8(); |
| let i = bytes.next_u8() * 16 + bytes.next_u8(); |
| let j = bytes.next_u8() * 16 + bytes.next_u8(); |
| let k = bytes.next_u8() * 16 + bytes.next_u8(); |
| |
| Self::from_values(a, b, c, [d, e, f, g, h, i, j, k]) |
| } |
| } |
| |
| impl std::convert::From<u128> for GUID { |
| fn from(value: u128) -> Self { |
| Self::from_u128(value) |
| } |
| } |
| |
| impl std::convert::From<GUID> for u128 { |
| fn from(value: GUID) -> Self { |
| value.to_u128() |
| } |
| } |
| |
| trait HexReader { |
| fn next_u8(&mut self) -> u8; |
| fn next_u16(&mut self) -> u16; |
| fn next_u32(&mut self) -> u32; |
| } |
| |
| impl HexReader for std::str::Bytes<'_> { |
| fn next_u8(&mut self) -> u8 { |
| let value = self.next().unwrap(); |
| match value { |
| b'0'..=b'9' => value - b'0', |
| b'A'..=b'F' => 10 + value - b'A', |
| b'a'..=b'f' => 10 + value - b'a', |
| _ => panic!(), |
| } |
| } |
| |
| fn next_u16(&mut self) -> u16 { |
| self.next_u8().into() |
| } |
| |
| fn next_u32(&mut self) -> u32 { |
| self.next_u8().into() |
| } |
| } |