From dd683a282f1b02438967936e85a8601f90f29400 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Thu, 10 Dec 2020 19:36:29 +0300
Subject: [PATCH] cmd/tai64nlocal

---
 README                  |  8 ++++++
 cmd/tai64nlocal/main.go | 58 +++++++++++++++++++++++++++++++++++++++++
 tai64n.go               |  6 ++---
 3 files changed, 69 insertions(+), 3 deletions(-)
 create mode 100644 cmd/tai64nlocal/main.go

diff --git a/README b/README
index ad333a5..21988c8 100644
--- a/README
+++ b/README
@@ -1 +1,9 @@
 Pure Go TAI64N (http://cr.yp.to/libtai/tai64.html) implementation.
+cmd/tai64nlocal contains similar to DJB's one utility.
+Example TAI64N creation:
+
+    import "go.cypherpunks.ru/tai64n"
+
+    tai := new(tai64n.TAI64N)
+    tai64n.FromTime(time.Now(), tai)
+    println(tai.Encode()) // @400000005fd24ce33323c4d1
diff --git a/cmd/tai64nlocal/main.go b/cmd/tai64nlocal/main.go
new file mode 100644
index 0000000..2f3ed15
--- /dev/null
+++ b/cmd/tai64nlocal/main.go
@@ -0,0 +1,58 @@
+/*
+go.cypherpunks.ru/tai64n -- Pure Go TAI64N implementation
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"strings"
+	"time"
+
+	"go.cypherpunks.ru/tai64n"
+)
+
+func main() {
+	log.SetFlags(0)
+	scanner := bufio.NewScanner(os.Stdin)
+	var err error
+	var s string
+	var sep int
+	var t time.Time
+	for {
+		if !scanner.Scan() {
+			if err = scanner.Err(); err != nil {
+				log.Fatalln(err)
+			}
+			break
+		}
+		s = scanner.Text()
+		if s[0] != '@' {
+			os.Stdout.WriteString(s + "\n")
+		}
+		sep = strings.IndexByte(s, byte(' '))
+		if sep == -1 {
+			os.Stdout.WriteString(s + "\n")
+		}
+		t, err = tai64n.Decode(s[1:sep])
+		if err != nil {
+			log.Fatalln(err)
+		}
+		os.Stdout.WriteString(t.Format(tai64n.LocalFmt) + s[sep:] + "\n")
+	}
+}
diff --git a/tai64n.go b/tai64n.go
index 34a63d1..5087361 100644
--- a/tai64n.go
+++ b/tai64n.go
@@ -33,9 +33,9 @@ const (
 
 type TAI64N [Size]byte
 
-func FromTime(t time.Time, tai *TAI64N) {
-	binary.BigEndian.PutUint64(tai[:], uint64(Base)+uint64(t.Unix()))
-	binary.BigEndian.PutUint32(tai[8:], uint32(t.Nanosecond()))
+func FromTime(src time.Time, dst *TAI64N) {
+	binary.BigEndian.PutUint64(dst[:], uint64(Base)+uint64(src.Unix()))
+	binary.BigEndian.PutUint32(dst[8:], uint32(src.Nanosecond()))
 }
 
 func ToTime(tai []byte) time.Time {
-- 
2.44.0