X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=cmd%2Ftai64nlocal%2Fmain.go;h=4fa1926bc1c700c7edb6f8cd0f6e4ff5ba4f86df;hb=HEAD;hp=571c30ac8ffe87271312af27bbc130b685ea085e;hpb=409705fa3bbf9f18c6df91be80199d4d14c234d2;p=gotai64n.git

diff --git a/cmd/tai64nlocal/main.go b/cmd/tai64nlocal/main.go
index 571c30a..4fa1926 100644
--- a/cmd/tai64nlocal/main.go
+++ b/cmd/tai64nlocal/main.go
@@ -1,34 +1,53 @@
-/*
-go.cypherpunks.ru/tai64n -- Pure Go TAI64N implementation
-Copyright (C) 2020-2021 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/>.
-*/
+// go.cypherpunks.ru/tai64n -- Pure Go TAI64/TAI64N implementation
+// Copyright (C) 2020-2024 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"
+	"flag"
+	"fmt"
 	"log"
 	"os"
 	"strings"
 	"time"
 
-	"go.cypherpunks.ru/tai64n"
+	"go.cypherpunks.ru/tai64n/v2"
 )
 
 func main() {
 	log.SetFlags(0)
+	flag.Usage = func() {
+		fmt.Fprintf(
+			flag.CommandLine.Output(),
+			"Replace \"@HEX(TAI64)\"-prefixed line with human readable UTC.\n",
+		)
+		flag.PrintDefaults()
+	}
+	leapsecs := flag.Bool("leapsecs", false, "Take leap seconds into account: honest TAI->UTC")
+	db := flag.String("leapsecsdb", "", "Use that leapsecs.dat leap seconds database")
+	flag.Parse()
+
+	if *db != "" {
+		buf, err := os.ReadFile(*db)
+		if err != nil {
+			log.Fatalln(err)
+		}
+		tai64n.LeapsecsDBLoad(buf)
+	}
+
 	scanner := bufio.NewScanner(os.Stdin)
 	var err error
 	var s string
@@ -44,15 +63,20 @@ func main() {
 		s = scanner.Text()
 		if s[0] != '@' {
 			os.Stdout.WriteString(s + "\n")
+			continue
 		}
 		sep = strings.IndexByte(s, byte(' '))
 		if sep == -1 {
 			os.Stdout.WriteString(s + "\n")
+			continue
 		}
 		t, err = tai64n.Decode(s[1:sep])
 		if err != nil {
 			log.Fatalln(err)
 		}
+		if *leapsecs {
+			t = tai64n.LeapsecsSub(t)
+		}
 		os.Stdout.WriteString(t.Format(tai64n.LocalFmt) + s[sep:] + "\n")
 	}
 }