diff options
Diffstat (limited to 'vendor/github.com/labstack/gommon/bytes')
| -rw-r--r-- | vendor/github.com/labstack/gommon/bytes/bytes.go | 173 |
1 files changed, 140 insertions, 33 deletions
diff --git a/vendor/github.com/labstack/gommon/bytes/bytes.go b/vendor/github.com/labstack/gommon/bytes/bytes.go index 2f6bcec6..b07e31cd 100644 --- a/vendor/github.com/labstack/gommon/bytes/bytes.go +++ b/vendor/github.com/labstack/gommon/bytes/bytes.go @@ -12,19 +12,31 @@ type ( Bytes struct{} ) +// binary units (IEC 60027) const ( _ = 1.0 << (10 * iota) // ignore first value by assigning to blank identifier - KB - MB - GB - TB - PB - EB + KiB + MiB + GiB + TiB + PiB + EiB +) + +// decimal units (SI international system of units) +const ( + KB = 1000 + MB = KB * 1000 + GB = MB * 1000 + TB = GB * 1000 + PB = TB * 1000 + EB = PB * 1000 ) var ( - pattern = regexp.MustCompile(`(?i)^(-?\d+(?:\.\d+)?)\s?([KMGTPE]B?|B?)$`) - global = New() + patternBinary = regexp.MustCompile(`(?i)^(-?\d+(?:\.\d+)?)\s?([KMGTPE]iB?)$`) + patternDecimal = regexp.MustCompile(`(?i)^(-?\d+(?:\.\d+)?)\s?([KMGTPE]B?|B?)$`) + global = New() ) // New creates a Bytes instance. @@ -32,44 +44,97 @@ func New() *Bytes { return &Bytes{} } -// Format formats bytes integer to human readable string. +// Format formats bytes integer to human readable string according to IEC 60027. +// For example, 31323 bytes will return 30.59KB. +func (b *Bytes) Format(value int64) string { + return b.FormatBinary(value) +} + +// FormatBinary formats bytes integer to human readable string according to IEC 60027. // For example, 31323 bytes will return 30.59KB. -func (*Bytes) Format(b int64) string { +func (*Bytes) FormatBinary(value int64) string { + multiple := "" + val := float64(value) + + switch { + case value >= EiB: + val /= EiB + multiple = "EiB" + case value >= PiB: + val /= PiB + multiple = "PiB" + case value >= TiB: + val /= TiB + multiple = "TiB" + case value >= GiB: + val /= GiB + multiple = "GiB" + case value >= MiB: + val /= MiB + multiple = "MiB" + case value >= KiB: + val /= KiB + multiple = "KiB" + case value == 0: + return "0" + default: + return strconv.FormatInt(value, 10) + "B" + } + + return fmt.Sprintf("%.2f%s", val, multiple) +} + +// FormatDecimal formats bytes integer to human readable string according to SI international system of units. +// For example, 31323 bytes will return 31.32KB. +func (*Bytes) FormatDecimal(value int64) string { multiple := "" - value := float64(b) + val := float64(value) switch { - case b >= EB: - value /= EB + case value >= EB: + val /= EB multiple = "EB" - case b >= PB: - value /= PB + case value >= PB: + val /= PB multiple = "PB" - case b >= TB: - value /= TB + case value >= TB: + val /= TB multiple = "TB" - case b >= GB: - value /= GB + case value >= GB: + val /= GB multiple = "GB" - case b >= MB: - value /= MB + case value >= MB: + val /= MB multiple = "MB" - case b >= KB: - value /= KB + case value >= KB: + val /= KB multiple = "KB" - case b == 0: + case value == 0: return "0" default: - return strconv.FormatInt(b, 10) + "B" + return strconv.FormatInt(value, 10) + "B" } - return fmt.Sprintf("%.2f%s", value, multiple) + return fmt.Sprintf("%.2f%s", val, multiple) } // Parse parses human readable bytes string to bytes integer. -// For example, 6GB (6G is also valid) will return 6442450944. -func (*Bytes) Parse(value string) (i int64, err error) { - parts := pattern.FindStringSubmatch(value) +// For example, 6GiB (6Gi is also valid) will return 6442450944, and +// 6GB (6G is also valid) will return 6000000000. +func (b *Bytes) Parse(value string) (int64, error) { + + i, err := b.ParseBinary(value) + if err == nil { + return i, err + } + + return b.ParseDecimal(value) +} + +// ParseBinary parses human readable bytes string to bytes integer. +// For example, 6GiB (6Gi is also valid) will return 6442450944. +func (*Bytes) ParseBinary(value string) (i int64, err error) { + parts := patternBinary.FindStringSubmatch(value) if len(parts) < 3 { return 0, fmt.Errorf("error parsing value=%s", value) } @@ -81,8 +146,38 @@ func (*Bytes) Parse(value string) (i int64, err error) { } switch multiple { + case "KI", "KIB": + return int64(bytes * KiB), nil + case "MI", "MIB": + return int64(bytes * MiB), nil + case "GI", "GIB": + return int64(bytes * GiB), nil + case "TI", "TIB": + return int64(bytes * TiB), nil + case "PI", "PIB": + return int64(bytes * PiB), nil + case "EI", "EIB": + return int64(bytes * EiB), nil default: return int64(bytes), nil + } +} + +// ParseDecimal parses human readable bytes string to bytes integer. +// For example, 6GB (6G is also valid) will return 6000000000. +func (*Bytes) ParseDecimal(value string) (i int64, err error) { + parts := patternDecimal.FindStringSubmatch(value) + if len(parts) < 3 { + return 0, fmt.Errorf("error parsing value=%s", value) + } + bytesString := parts[1] + multiple := strings.ToUpper(parts[2]) + bytes, err := strconv.ParseFloat(bytesString, 64) + if err != nil { + return + } + + switch multiple { case "K", "KB": return int64(bytes * KB), nil case "M", "MB": @@ -95,15 +190,27 @@ func (*Bytes) Parse(value string) (i int64, err error) { return int64(bytes * PB), nil case "E", "EB": return int64(bytes * EB), nil + default: + return int64(bytes), nil } } // Format wraps global Bytes's Format function. -func Format(b int64) string { - return global.Format(b) +func Format(value int64) string { + return global.Format(value) +} + +// FormatBinary wraps global Bytes's FormatBinary function. +func FormatBinary(value int64) string { + return global.FormatBinary(value) +} + +// FormatDecimal wraps global Bytes's FormatDecimal function. +func FormatDecimal(value int64) string { + return global.FormatDecimal(value) } // Parse wraps global Bytes's Parse function. -func Parse(val string) (int64, error) { - return global.Parse(val) +func Parse(value string) (int64, error) { + return global.Parse(value) } |