diff options
Diffstat (limited to 'lib/uuidv7/uuid.go')
| -rw-r--r-- | lib/uuidv7/uuid.go | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/uuidv7/uuid.go b/lib/uuidv7/uuid.go index 203b41cf..43e293ca 100644 --- a/lib/uuidv7/uuid.go +++ b/lib/uuidv7/uuid.go @@ -16,15 +16,17 @@ import ( const hexTable = `0123456789ABCDEF` const variantMask uint64 = 0x8000_0000_0000_0000 -// Now defines the function variable that return the current time in UTC. +// NowFunc defines the function variable that return the current time in UTC. // This identifier is exported to simplify testing. -var Now = func() time.Time { +var NowFunc = func() time.Time { return time.Now().UTC() } -// Rand defines the function variable that return a random uint64. +// RandFunc defines the function variable that return a random uint64. // This identifier is exported to simplify testing. -var Rand = func() (v uint64) { +// User with Go 1.26 or later should use [testing/cryptotest.SetGlobalRandom] +// function to mock the random generator. +var RandFunc = func() (v uint64) { b := make([]byte, 8) rand.Read(b) v, _ = binary.Uvarint(b) @@ -45,7 +47,7 @@ type UUID struct { // Generate generates new UUID version 7. func Generate() (id UUID) { - now := Now() + now := NowFunc() generate(&now, &id) return id } @@ -58,7 +60,7 @@ func generate(t *time.Time, id *UUID) { prec := unixns - (millis * 1e6) // 456700 clockPrec := uint64((prec * 4096) / 1e6) // 1870 id.high |= clockPrec // 0x019c_d2f8_1ecb_774e - rand := Rand() // 0xffff_ffff_ffff_ffff + rand := RandFunc() // 0xffff_ffff_ffff_ffff rand >>= 2 // 0x3fff_ffff_ffff_ffff id.low = variantMask | rand // 0xbfff_ffff_ffff_ffff } |