X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=cmd%2Ftai64nlocal%2Fmain.go;h=c5dc96557db0f1424da58ca71ab49d2671fb684e;hb=f1c943309e457d9bf9617677584a2f8db828e025;hp=2f3ed153f17f436b3ec5d6ac98245ea071ee0bc6;hpb=dd683a282f1b02438967936e85a8601f90f29400;p=gotai64n.git

diff --git a/cmd/tai64nlocal/main.go b/cmd/tai64nlocal/main.go
index 2f3ed15..c5dc965 100644
--- a/cmd/tai64nlocal/main.go
+++ b/cmd/tai64nlocal/main.go
@@ -1,6 +1,6 @@
 /*
-go.cypherpunks.ru/tai64n -- Pure Go TAI64N implementation
-Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+go.cypherpunks.ru/tai64n -- Pure Go TAI64/TAI64N implementation
+Copyright (C) 2020-2022 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
@@ -19,16 +19,37 @@ 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 +65,20 @@ 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")
 	}
 }