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Improve time-related API in uuid package

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- Let timestamps be specified by the user.
- Change `time_v*` to `raw_time_v*` and implement an API that returns
  timestamps from the `time` package.
This commit is contained in:
Feoramund
2024-06-22 18:21:32 -04:00
parent ea771d0cb7
commit 9b265b2309
3 changed files with 134 additions and 80 deletions
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core/encoding/uuid/reading.odin
+53 -10
View File
@@ -1,6 +1,7 @@
package uuid
import "base:runtime"
import "core:time"
/*
Convert a string to a UUID.
@@ -127,7 +128,7 @@ node :: proc "contextless" (id: Identifier) -> (node: [6]u8) {
}
/*
Get the timestamp of a version 1 UUID.
Get the raw timestamp of a version 1 UUID.
Inputs:
- id: The identifier.
@@ -135,7 +136,7 @@ Inputs:
Returns:
- timestamp: The timestamp, in 100-nanosecond intervals since 1582-10-15.
*/
time_v1 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
raw_time_v1 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
timestamp_octets: [8]u8
timestamp_octets[0] = id[0]
@@ -151,6 +152,39 @@ time_v1 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
return cast(u64)transmute(u64le)timestamp_octets
}
/*
Get the timestamp of a version 1 UUID.
Inputs:
- id: The identifier.
Returns:
- timestamp: The timestamp of the UUID.
*/
time_v1 :: proc "contextless" (id: Identifier) -> (timestamp: time.Time) {
delta := cast(time.Duration)(raw_time_v1(id) - HNS_INTERVALS_BETWEEN_GREG_AND_UNIX) * 100
return time.time_add({}, delta)
}
/*
Get the raw timestamp of a version 6 UUID.
Inputs:
- id: The identifier.
Returns:
- timestamp: The timestamp, in 100-nanosecond intervals since 1582-10-15.
*/
raw_time_v6 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
temporary := transmute(u128be)id
timestamp |= cast(u64)(temporary & 0xFFFFFFFF_FFFF0000_00000000_00000000 >> 68)
timestamp |= cast(u64)(temporary & 0x00000000_00000FFF_00000000_00000000 >> 64)
return timestamp
}
/*
Get the timestamp of a version 6 UUID.
@@ -160,13 +194,23 @@ Inputs:
Returns:
- timestamp: The timestamp, in 100-nanosecond intervals since 1582-10-15.
*/
time_v6 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
temporary := transmute(u128be)id
time_v6 :: proc "contextless" (id: Identifier) -> (timestamp: time.Time) {
delta := cast(time.Duration)(raw_time_v6(id) - HNS_INTERVALS_BETWEEN_GREG_AND_UNIX) * 100
return time.time_add({}, delta)
}
timestamp |= cast(u64)(temporary & 0xFFFFFFFF_FFFF0000_00000000_00000000 >> 68)
timestamp |= cast(u64)(temporary & 0x00000000_00000FFF_00000000_00000000 >> 64)
/*
Get the raw timestamp of a version 7 UUID.
return timestamp
Inputs:
- id: The identifier.
Returns:
- timestamp: The timestamp, in milliseconds since the UNIX epoch.
*/
raw_time_v7 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
time_bits := transmute(u128be)id & VERSION_7_TIME_MASK
return cast(u64)(time_bits >> VERSION_7_TIME_SHIFT)
}
/*
@@ -178,9 +222,8 @@ Inputs:
Returns:
- timestamp: The timestamp, in milliseconds since the UNIX epoch.
*/
time_v7 :: proc "contextless" (id: Identifier) -> (timestamp: u64) {
time_bits := transmute(u128be)id & VERSION_7_TIME_MASK
return cast(u64)(time_bits >> VERSION_7_TIME_SHIFT)
time_v7 :: proc "contextless" (id: Identifier) -> (timestamp: time.Time) {
return time.time_add({}, cast(time.Duration)(raw_time_v7(id) * 1e6))
}
/*