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@ -8,6 +8,7 @@ import (
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"crypto/md5" |
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"encoding/hex" |
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"fmt" |
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"math" |
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"strings" |
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"time" |
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) |
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@ -80,6 +81,51 @@ func TimeSince(then time.Time) string {
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return then.String() |
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} |
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const ( |
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Byte = 1 |
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KByte = Byte * 1024 |
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MByte = KByte * 1024 |
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GByte = MByte * 1024 |
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TByte = GByte * 1024 |
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PByte = TByte * 1024 |
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EByte = PByte * 1024 |
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) |
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var bytesSizeTable = map[string]uint64{ |
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"b": Byte, |
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"kb": KByte, |
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"mb": MByte, |
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"gb": GByte, |
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"tb": TByte, |
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"pb": PByte, |
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"eb": EByte, |
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} |
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func logn(n, b float64) float64 { |
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return math.Log(n) / math.Log(b) |
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} |
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func humanateBytes(s uint64, base float64, sizes []string) string { |
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if s < 10 { |
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return fmt.Sprintf("%dB", s) |
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} |
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e := math.Floor(logn(float64(s), base)) |
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suffix := sizes[int(e)] |
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val := float64(s) / math.Pow(base, math.Floor(e)) |
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f := "%.0f" |
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if val < 10 { |
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f = "%.1f" |
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} |
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return fmt.Sprintf(f+"%s", val, suffix) |
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} |
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// FileSize calculates the file size and generate user-friendly string.
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func FileSize(s int64) string { |
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sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"} |
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return humanateBytes(uint64(s), 1024, sizes) |
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} |
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// Subtract deals with subtraction of all types of number.
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func Subtract(left interface{}, right interface{}) interface{} { |
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var rleft, rright int64 |
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