mirror of
https://github.com/opentofu/opentofu.git
synced 2025-01-08 23:23:59 -06:00
cfa299d2ee
Nomad was manually updated, so revert that to the version in master, remove it from vendor.json and add it to the ignore list. Update all packages that were in an unknown state to their latest master commits.
114 lines
2.4 KiB
Go
114 lines
2.4 KiB
Go
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 1M instead of 1000k
|
|
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) -> 1MB
|
|
// e.g. SI(2.2345e-12, "F") -> 2.2345pF
|
|
func SI(input float64, unit string) string {
|
|
value, prefix := ComputeSI(input)
|
|
return Ftoa(value) + " " + 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(2.2345pF) -> (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
|
|
}
|