53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
// +build windows
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package archive
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import (
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"strconv"
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"strings"
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"time"
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"github.com/dmcgowan/go-tar"
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)
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// Forked from https://github.com/golang/go/blob/master/src/archive/tar/strconv.go
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// as archive/tar doesn't support CreationTime, but does handle PAX time parsing,
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// and there's no need to re-invent the wheel.
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// parsePAXTime takes a string of the form %d.%d as described in the PAX
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// specification. Note that this implementation allows for negative timestamps,
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// which is allowed for by the PAX specification, but not always portable.
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func parsePAXTime(s string) (time.Time, error) {
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const maxNanoSecondDigits = 9
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// Split string into seconds and sub-seconds parts.
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ss, sn := s, ""
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if pos := strings.IndexByte(s, '.'); pos >= 0 {
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ss, sn = s[:pos], s[pos+1:]
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}
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// Parse the seconds.
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secs, err := strconv.ParseInt(ss, 10, 64)
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if err != nil {
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return time.Time{}, tar.ErrHeader
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}
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if len(sn) == 0 {
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return time.Unix(secs, 0), nil // No sub-second values
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}
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// Parse the nanoseconds.
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if strings.Trim(sn, "0123456789") != "" {
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return time.Time{}, tar.ErrHeader
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}
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if len(sn) < maxNanoSecondDigits {
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sn += strings.Repeat("0", maxNanoSecondDigits-len(sn)) // Right pad
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} else {
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sn = sn[:maxNanoSecondDigits] // Right truncate
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}
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nsecs, _ := strconv.ParseInt(sn, 10, 64) // Must succeed
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if len(ss) > 0 && ss[0] == '-' {
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return time.Unix(secs, -1*int64(nsecs)), nil // Negative correction
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}
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return time.Unix(secs, int64(nsecs)), nil
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}
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