aboutsummaryrefslogtreecommitdiffstats
path: root/vendor/github.com/dustin/go-humanize/si.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/github.com/dustin/go-humanize/si.go')
-rw-r--r--vendor/github.com/dustin/go-humanize/si.go123
1 files changed, 0 insertions, 123 deletions
diff --git a/vendor/github.com/dustin/go-humanize/si.go b/vendor/github.com/dustin/go-humanize/si.go
deleted file mode 100644
index ae659e0e..00000000
--- a/vendor/github.com/dustin/go-humanize/si.go
+++ /dev/null
@@ -1,123 +0,0 @@
-package humanize
-
-import (
- "errors"
- "math"
- "regexp"
- "strconv"
-)
-
-var siPrefixTable = map[float64]string{
- -24: "y", // yocto
- -21: "z", // zepto
- -18: "a", // atto
- -15: "f", // femto
- -12: "p", // pico
- -9: "n", // nano
- -6: "µ", // micro
- -3: "m", // milli
- 0: "",
- 3: "k", // kilo
- 6: "M", // mega
- 9: "G", // giga
- 12: "T", // tera
- 15: "P", // peta
- 18: "E", // exa
- 21: "Z", // zetta
- 24: "Y", // yotta
-}
-
-var revSIPrefixTable = revfmap(siPrefixTable)
-
-// revfmap reverses the map and precomputes the power multiplier
-func revfmap(in map[float64]string) map[string]float64 {
- rv := map[string]float64{}
- for k, v := range in {
- rv[v] = math.Pow(10, k)
- }
- return rv
-}
-
-var riParseRegex *regexp.Regexp
-
-func init() {
- ri := `^([\-0-9.]+)\s?([`
- for _, v := range siPrefixTable {
- ri += v
- }
- ri += `]?)(.*)`
-
- riParseRegex = regexp.MustCompile(ri)
-}
-
-// ComputeSI finds the most appropriate SI prefix for the given number
-// and returns the prefix along with the value adjusted to be within
-// that prefix.
-//
-// See also: SI, ParseSI.
-//
-// e.g. ComputeSI(2.2345e-12) -> (2.2345, "p")
-func ComputeSI(input float64) (float64, string) {
- if input == 0 {
- return 0, ""
- }
- mag := math.Abs(input)
- exponent := math.Floor(logn(mag, 10))
- exponent = math.Floor(exponent/3) * 3
-
- value := mag / math.Pow(10, exponent)
-
- // Handle special case where value is exactly 1000.0
- // Should return 1 M instead of 1000 k
- if value == 1000.0 {
- exponent += 3
- value = mag / math.Pow(10, exponent)
- }
-
- value = math.Copysign(value, input)
-
- prefix := siPrefixTable[exponent]
- return value, prefix
-}
-
-// SI returns a string with default formatting.
-//
-// SI uses Ftoa to format float value, removing trailing zeros.
-//
-// See also: ComputeSI, ParseSI.
-//
-// e.g. SI(1000000, "B") -> 1 MB
-// e.g. SI(2.2345e-12, "F") -> 2.2345 pF
-func SI(input float64, unit string) string {
- value, prefix := ComputeSI(input)
- return Ftoa(value) + " " + prefix + unit
-}
-
-// SIWithDigits works like SI but limits the resulting string to the
-// given number of decimal places.
-//
-// e.g. SIWithDigits(1000000, 0, "B") -> 1 MB
-// e.g. SIWithDigits(2.2345e-12, 2, "F") -> 2.23 pF
-func SIWithDigits(input float64, decimals int, unit string) string {
- value, prefix := ComputeSI(input)
- return FtoaWithDigits(value, decimals) + " " + prefix + unit
-}
-
-var errInvalid = errors.New("invalid input")
-
-// ParseSI parses an SI string back into the number and unit.
-//
-// See also: SI, ComputeSI.
-//
-// e.g. ParseSI("2.2345 pF") -> (2.2345e-12, "F", nil)
-func ParseSI(input string) (float64, string, error) {
- found := riParseRegex.FindStringSubmatch(input)
- if len(found) != 4 {
- return 0, "", errInvalid
- }
- mag := revSIPrefixTable[found[2]]
- unit := found[3]
-
- base, err := strconv.ParseFloat(found[1], 64)
- return base * mag, unit, err
-}