You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: strconv.go
    path of file: ./repos/podman/vendor/github.com/Microsoft/go-winio/backuptar
    
    the code of the file until where you have to start completion: //go:build windows

package backuptar

import (
	"archive/tar"
	"fmt"
	"strconv"
	"strings"
	"time"
)

// Functions copied from https://github.com/golang/go/blob/master/src/archive/tar/strconv.go
// as we need to manage the LIBARCHIVE.creationtime PAXRecord manually.
// Idea taken from containerd which did the same thing.

// parsePAXTime takes a stri
    
func parsePAXTime(s string) (time.Time, error) {
	const maxNanoSecondDigits = 9

	// Split string into seconds and sub-seconds parts.
	ss, sn := s, ""
	if pos := strings.IndexByte(s, '.'); pos >= 0 {
		ss, sn = s[:pos], s[pos+1:]
	}

	// Parse the seconds.
	secs, err := strconv.ParseInt(ss, 10, 64)
	if err != nil {
		return time.Time{}, tar.ErrHeader
	}
	if len(sn) == 0 {
		return time.Unix(secs, 0), nil // No sub-second values
	}

	// Parse the nanoseconds.
	if strings.Trim(sn, "0123456789") != "" {
		return time.Time{}, tar.ErrHeader
	}
	if len(sn) < maxNanoSecondDigits {
		sn += strings.Repeat("0", maxNanoSecondDigits-len(sn)) // Right pad
	} else {
		sn = sn[:maxNanoSecondDigits] // Right truncate
	}
	nsecs, _ := strconv.ParseInt(sn, 10, 64) // Must succeed
	if len(ss) > 0 && ss[0] == '-' {
		return time.Unix(secs, -1*nsecs), nil // Negative correction
	}
	return time.Unix(secs, nsecs), nil
}