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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| package humanize | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math" | ||
| "strconv" | ||
| "strings" | ||
| "unicode" | ||
| ) | ||
|
|
||
| // IEC Sizes. | ||
| // kibis of bits | ||
| const ( | ||
| Byte = 1 << (iota * 10) | ||
| KiByte | ||
| MiByte | ||
| GiByte | ||
| TiByte | ||
| PiByte | ||
| EiByte | ||
| ) | ||
|
|
||
| // SI Sizes. | ||
| const ( | ||
| IByte = 1 | ||
| KByte = IByte * 1000 | ||
| MByte = KByte * 1000 | ||
| GByte = MByte * 1000 | ||
| TByte = GByte * 1000 | ||
| PByte = TByte * 1000 | ||
| EByte = PByte * 1000 | ||
| ) | ||
|
|
||
| var defaultSizeTable = map[string]uint64{ | ||
| "b": Byte, | ||
| "kib": KiByte, | ||
| "kb": KByte, | ||
| "mib": MiByte, | ||
| "mb": MByte, | ||
| "gib": GiByte, | ||
| "gb": GByte, | ||
| "tib": TiByte, | ||
| "tb": TByte, | ||
| "pib": PiByte, | ||
| "pb": PByte, | ||
| "eib": EiByte, | ||
| "eb": EByte, | ||
| // Without suffix | ||
| "": Byte, | ||
| "ki": KiByte, | ||
| "k": KByte, | ||
| "mi": MiByte, | ||
| "m": MByte, | ||
| "gi": GiByte, | ||
| "g": GByte, | ||
| "ti": TiByte, | ||
| "t": TByte, | ||
| "pi": PiByte, | ||
| "p": PByte, | ||
| "ei": EiByte, | ||
| "e": EByte, | ||
| } | ||
|
|
||
| var memorysSizeTable = map[string]uint64{ | ||
| "b": Byte, | ||
| "kb": KiByte, | ||
| "mb": MiByte, | ||
| "gb": GiByte, | ||
| "tb": TiByte, | ||
| "pb": PiByte, | ||
| "eb": EiByte, | ||
| "": Byte, | ||
| "k": KiByte, | ||
| "m": MiByte, | ||
| "g": GiByte, | ||
| "t": TiByte, | ||
| "p": PiByte, | ||
| "e": EiByte, | ||
| } | ||
|
|
||
| var ( | ||
| defaultSizes = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB"} | ||
| iSizes = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"} | ||
| ) | ||
|
|
||
| func Bytes(s uint64) string { | ||
| return humanateBytes(s, 1000, defaultSizes) | ||
| } | ||
|
|
||
| func MemoryBytes(s uint64) string { | ||
| return humanateBytes(s, 1024, defaultSizes) | ||
| } | ||
|
|
||
| func IBytes(s uint64) string { | ||
| return humanateBytes(s, 1024, iSizes) | ||
| } | ||
|
|
||
| func logn(n, b float64) float64 { | ||
| return math.Log(n) / math.Log(b) | ||
| } | ||
|
|
||
| func humanateBytes(s uint64, base float64, sizes []string) string { | ||
| if s < 10 { | ||
| return fmt.Sprintf("%d B", s) | ||
| } | ||
| e := math.Floor(logn(float64(s), base)) | ||
| suffix := sizes[int(e)] | ||
| val := math.Floor(float64(s)/math.Pow(base, e)*10+0.5) / 10 | ||
| f := "%.0f %s" | ||
| if val < 10 { | ||
| f = "%.1f %s" | ||
| } | ||
|
|
||
| return fmt.Sprintf(f, val, suffix) | ||
| } | ||
|
|
||
| func ParseBytes(s string) (uint64, error) { | ||
| return parseBytes0(s, defaultSizeTable) | ||
| } | ||
|
|
||
| func ParseMemoryBytes(s string) (uint64, error) { | ||
| return parseBytes0(s, memorysSizeTable) | ||
| } | ||
|
|
||
| func parseBytes0(s string, sizeTable map[string]uint64) (uint64, error) { | ||
| lastDigit := 0 | ||
| hasComma := false | ||
| for _, r := range s { | ||
| if !(unicode.IsDigit(r) || r == '.' || r == ',') { | ||
| break | ||
| } | ||
| if r == ',' { | ||
| hasComma = true | ||
| } | ||
| lastDigit++ | ||
| } | ||
|
|
||
| num := s[:lastDigit] | ||
| if hasComma { | ||
| num = strings.Replace(num, ",", "", -1) | ||
| } | ||
|
|
||
| f, err := strconv.ParseFloat(num, 64) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| extra := strings.ToLower(strings.TrimSpace(s[lastDigit:])) | ||
| if m, ok := sizeTable[extra]; ok { | ||
| f *= float64(m) | ||
| if f >= math.MaxUint64 { | ||
| return 0, fmt.Errorf("too large: %v", s) | ||
| } | ||
| return uint64(f), nil | ||
| } | ||
|
|
||
| return 0, fmt.Errorf("unhandled size name: %v", extra) | ||
| } |
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