48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
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package kubernetes
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import (
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"strconv"
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"strings"
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)
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const defaultPercentageValuePrecision = 3
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// percentageValue is int64 form of percentage value with 10^-3 precision.
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type percentageValue int64
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// toFloat64 returns its decimal float64 value.
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func (v percentageValue) toFloat64() float64 {
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return float64(v) / (1000 * 100)
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}
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func (v percentageValue) computeWeight(count int) int {
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if count == 0 {
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return 0
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}
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return int(float64(v) / float64(count))
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}
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// String returns its string form of percentage value.
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func (v percentageValue) String() string {
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return strconv.FormatFloat(v.toFloat64()*100, 'f', defaultPercentageValuePrecision, 64) + "%"
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}
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// newPercentageValueFromString tries to read percentage value from string, it can be either "1.1" or "1.1%", "6%".
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// It will lose the extra precision if there are more digits after decimal point.
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func newPercentageValueFromString(rawValue string) (percentageValue, error) {
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if strings.HasSuffix(rawValue, "%") {
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rawValue = rawValue[:len(rawValue)-1]
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}
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value, err := strconv.ParseFloat(rawValue, 64)
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if err != nil {
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return 0, err
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}
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return newPercentageValueFromFloat64(value) / 100, nil
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}
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// newPercentageValueFromFloat64 reads percentage value from float64
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func newPercentageValueFromFloat64(f float64) percentageValue {
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return percentageValue(f * (1000 * 100))
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}
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