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100 lines
2.5 KiB
100 lines
2.5 KiB
package govalidator
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import (
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"math"
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)
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// Abs returns absolute value of number
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func Abs(value float64) float64 {
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return math.Abs(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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// InRangeInt returns true if value lies between left and right border
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func InRangeInt(value, left, right interface{}) bool {
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value64, _ := ToInt(value)
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left64, _ := ToInt(left)
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right64, _ := ToInt(right)
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if left64 > right64 {
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left64, right64 = right64, left64
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}
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return value64 >= left64 && value64 <= right64
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}
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// InRangeFloat32 returns true if value lies between left and right border
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func InRangeFloat32(value, left, right float32) 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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// InRangeFloat64 returns true if value lies between left and right border
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func InRangeFloat64(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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// InRange returns true if value lies between left and right border, generic type to handle int, float32, float64 and string.
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// All types must the same type.
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// False if value doesn't lie in range or if it incompatible or not comparable
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func InRange(value interface{}, left interface{}, right interface{}) bool {
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switch value.(type) {
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case int:
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intValue, _ := ToInt(value)
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intLeft, _ := ToInt(left)
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intRight, _ := ToInt(right)
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return InRangeInt(intValue, intLeft, intRight)
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case float32, float64:
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intValue, _ := ToFloat(value)
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intLeft, _ := ToFloat(left)
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intRight, _ := ToFloat(right)
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return InRangeFloat64(intValue, intLeft, intRight)
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case string:
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return value.(string) >= left.(string) && value.(string) <= right.(string)
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default:
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return false
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}
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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 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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