### Timer changes

Go 1.23 makes two significant changes to the implementation of
[time.Timer] and [time.Ticker].

First, `Timer`s and `Ticker`s that are no longer referred to by the program
become eligible for garbage collection immediately, even if their
`Stop` methods have not been called.
Earlier versions of Go did not collect unstopped `Timer`s until after
they had fired and never collected unstopped `Ticker`s.

Joe Tsai <******@****.***> 1503947278 -0700

Joe Tsai <******@****.***> 1503947278 -0700

// templateV7Plus or writeRawFile.
func (tw *Writer) templateV7Plus(hdr *Header, fmtStr stringFormatter, fmtNum numberFormatter) *block {
	tw.blk.reset()

	modTime := hdr.ModTime
	if modTime.IsZero() {
		modTime = time.Unix(0, 0)
	}

	v7 := tw.blk.toV7()
	v7.typeFlag()[0] = hdr.Typeflag
	fmtStr(v7.name(), hdr.Name)
	fmtStr(v7.linkName(), hdr.Linkname)
	fmtNum(v7.mode(), hdr.Mode)

		ModifiedDate:     5678,
	}
	fi := fh.FileInfo()
	fh2, err := FileInfoHeader(fi)
	if err != nil {
		t.Fatal(err)
	}
	if got, want := fh2.ModTime(), fh.ModTime(); got != want {
		t.Errorf("Modified: got %s, want %s\n", got, want)
	}
	if got, want := fi.ModTime(), fh.ModTime(); got != want {
		t.Errorf("Modified: got %s, want %s\n", got, want)
	}
}

type repeatedByte struct {
	off int64
	b   byte

pkg time, const ANSIC = "Mon Jan _2 15:04:05 2006"
pkg time, const April = 4
pkg time, const August = 8
pkg time, const December = 12
pkg time, const February = 2
pkg time, const Friday = 5
pkg time, const Hour = 3600000000000
pkg time, const January = 1
pkg time, const July = 7
pkg time, const June = 6
pkg time, const Kitchen = "3:04PM"
pkg time, const March = 3

			}
			fieldBuf.uint32()              // AcTime (ignored)
			ts := int64(fieldBuf.uint32()) // ModTime since Unix epoch
			modified = time.Unix(ts, 0)
		case extTimeExtraID:
			if len(fieldBuf) < 5 || fieldBuf.uint8()&1 == 0 {
				continue parseExtras
			}
			ts := int64(fieldBuf.uint32()) // ModTime since Unix epoch
			modified = time.Unix(ts, 0)
		}
	}

pkg archive/tar, type FileInfoNames interface { Gname, IsDir, ModTime, Mode, Name, Size, Sys, Uname } #50102
pkg archive/tar, type FileInfoNames interface, Gname() (string, error) #50102
pkg archive/tar, type FileInfoNames interface, IsDir() bool #50102
pkg archive/tar, type FileInfoNames interface, ModTime() time.Time #50102
pkg archive/tar, type FileInfoNames interface, Mode() fs.FileMode #50102
pkg archive/tar, type FileInfoNames interface, Name() string #50102

func timeToMsDosTime(t time.Time) (fDate uint16, fTime uint16) {
	fDate = uint16(t.Day() + int(t.Month())<<5 + (t.Year()-1980)<<9)
	fTime = uint16(t.Second()/2 + t.Minute()<<5 + t.Hour()<<11)
	return
}

// ModTime returns the modification time in UTC using the legacy
// [ModifiedDate] and [ModifiedTime] fields.
//
// Deprecated: Use [Modified] instead.
func (h *FileHeader) ModTime() time.Time {

//	Size              | uint33 | unlimited |    uint89
//	Mode              | uint21 |    uint21 |    uint57
//	Uid/Gid           | uint21 | unlimited |    uint57
//	Uname/Gname       |    32B | unlimited |       32B
//	ModTime           | uint33 | unlimited |     int89
//	AccessTime        |    n/a | unlimited |     int89
//	ChangeTime        |    n/a | unlimited |     int89
//	Devmajor/Devminor | uint21 |    uint21 |    uint57