102 lines
2.0 KiB
Rust
102 lines
2.0 KiB
Rust
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pub mod v4;
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mod rng;
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pub(crate) type Bytes = [u8; 16];
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pub struct Uuid(Bytes);
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(u8)]
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pub enum Variant {
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NCS = 0u8,
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Default = 0x80,
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Microsoft = 0xc0,
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Future = 0xe0,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[repr(u8)]
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pub enum Version {
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Nil = 0,
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Time = 1,
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DCE = 2,
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MD5 = 3,
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Random = 4,
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SHA1 = 5,
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Unknown = u8::MAX
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}
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impl Uuid {
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pub fn new(version: Version) -> Self {
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match version {
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Version::Nil => Self::new_nil(),
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Version::Random => Self::new_random(),
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_ => panic!("Unsupported UUID version: {:?}", version)
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}
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}
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pub fn new_nil() -> Self {
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Uuid(Uuid::nil_bytes())
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}
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#[inline]
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pub const fn as_bytes(&self) -> &[u8] {
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&self.0
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}
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pub const fn get_variant(&self) -> Variant {
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match self.as_bytes()[8] {
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x if x & 0x80 == 0 => Variant::NCS,
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x if x & 0x40 == 0 => Variant::Default,
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x if x & 0x20 == 0 => Variant::Microsoft,
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_ => Variant::Future
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}
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}
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pub const fn get_version_num(&self) -> u8 {
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self.as_bytes()[6] >> 4
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}
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pub const fn get_version(&self) -> Version {
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match self.get_version_num() {
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0 => Version::Nil,
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1 => Version::Time,
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2 => Version::DCE,
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3 => Version::MD5,
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4 => Version::Random,
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5 => Version::SHA1,
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_ => Version::Unknown
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}
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}
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#[inline]
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const fn nil_bytes() -> Bytes {
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[0u8; 16]
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}
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#[inline]
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fn set_variant(bytes: &mut Bytes, variant: Variant) {
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let variant = variant as u8;
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let byte = bytes[8] & 0xf;
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bytes[8] = variant & byte;
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}
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#[inline]
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fn set_version(bytes: &mut Bytes, version: Version) {
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bytes[6] |= (version as u8) << 4;
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}
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}
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impl Default for Uuid {
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fn default() -> Self {
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Uuid::new_nil()
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}
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}
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// impl AsRef<Bytes> for Uuid {
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// fn as_ref(&self) -> &Bytes {
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// &self.0
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// }
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// }
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