mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-09-05 08:10:50 +00:00
51 lines
868 B
Go
51 lines
868 B
Go
package util
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"math/rand"
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"strings"
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"time"
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)
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var (
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counter = uint64(0)
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)
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func init() {
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rand.Seed(time.Now().UTC().UnixNano())
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}
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type SUUID uint64
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func leftPad(s string, padStr string, pLen int) string {
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return strings.Repeat(padStr, pLen) + s
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}
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func Id() SUUID {
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millis := uint64(time.Now().UTC().UnixNano())
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id := millis << (64 - 41)
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id |= uint64(rand.Intn(128)) << (64 - 41 - 13)
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id |= counter % 1024
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counter += 1
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return SUUID(id)
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}
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func SUUID_to_Hex(a SUUID) string {
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buf := new(bytes.Buffer)
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binary.Write(buf, binary.BigEndian, a)
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return hex.EncodeToString(buf.Bytes())
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}
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func Hex_to_SUUID(str string) SUUID {
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l := len(str)
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var m string
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if l < 16 {
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m = leftPad(str, "0", 16-l)
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} else {
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m = str
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}
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b, _ := hex.DecodeString(m)
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num := binary.BigEndian.Uint64(b)
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return SUUID(num)
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}
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