mirror of https://github.com/prometheus/prometheus
58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
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package govalidator
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import "math"
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// Abs returns absolute value of number
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func Abs(value float64) float64 {
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return value * Sign(value)
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}
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// Sign returns signum of number: 1 in case of value > 0, -1 in case of value < 0, 0 otherwise
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func Sign(value float64) float64 {
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if value > 0 {
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return 1
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} else if value < 0 {
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return -1
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} else {
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return 0
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}
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}
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// IsNegative returns true if value < 0
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func IsNegative(value float64) bool {
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return value < 0
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}
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// IsPositive returns true if value > 0
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func IsPositive(value float64) bool {
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return value > 0
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}
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// IsNonNegative returns true if value >= 0
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func IsNonNegative(value float64) bool {
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return value >= 0
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}
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// IsNonPositive returns true if value <= 0
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func IsNonPositive(value float64) bool {
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return value <= 0
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}
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// InRange returns true if value lies between left and right border
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func InRange(value, left, right float64) bool {
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if left > right {
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left, right = right, left
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}
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return value >= left && value <= right
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}
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// IsWhole returns true if value is whole number
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func IsWhole(value float64) bool {
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return Abs(math.Remainder(value, 1)) == 0
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}
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// IsNatural returns true if value is natural number (positive and whole)
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func IsNatural(value float64) bool {
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return IsWhole(value) && IsPositive(value)
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}
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