Leapsecs and TAI64 support

[gotai64n.git] / cmd / tai64nlocal / main.go

diff --git a/cmd/tai64nlocal/main.go b/cmd/tai64nlocal/main.go
index 4b58127a6fdfabd0a74da6ee3c64a835b8bbb340..b2a0c155d8f2220561197c19b445d80cec5322e8 100644 (file)
--- a/cmd/tai64nlocal/main.go
+++ b/cmd/tai64nlocal/main.go
@@ -1,5 +1,5 @@
 /*
-go.cypherpunks.ru/tai64n -- Pure Go TAI64N implementation
+go.cypherpunks.ru/tai64n -- Pure Go TAI64/TAI64N implementation
 Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
@@ -19,16 +19,38 @@ package main
 
 import (
        "bufio"
+       "flag"
+       "fmt"
+       "io/ioutil"
        "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 := ioutil.ReadFile(*db)
+               if err != nil {
+                       log.Fatalln(err)
+               }
+               tai64n.LeapsecsDBLoad(buf)
+       }
+
        scanner := bufio.NewScanner(os.Stdin)
        var err error
        var s string
@@ -55,6 +77,9 @@ func main() {
                if err != nil {
                        log.Fatalln(err)
                }
+               if *leapsecs {
+                       t = tai64n.LeapsecsSub(t)
+               }
                os.Stdout.WriteString(t.Format(tai64n.LocalFmt) + s[sep:] + "\n")
        }
 }