94 lines
1.5 KiB
Go
94 lines
1.5 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Package mathutils provides utilities supplementing the standard 'math' and 'math/rand' packages.
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package mathutils
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import (
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"math"
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"strconv"
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)
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const float64EqualityThreshold = 1e-9
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func MaxInt(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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func MaxInt32(a, b int32) int32 {
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if a > b {
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return a
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}
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return b
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}
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func MinInt(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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func MinInt32(a, b int32) int32 {
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if a < b {
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return a
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}
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return b
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}
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func MaxInt64(a, b int64) int64 {
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if a > b {
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return a
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}
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return b
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}
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func MinInt64(a, b int64) int64 {
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if a < b {
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return a
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}
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return b
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}
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func IsNatural(value string) bool {
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if v, err := strconv.ParseInt(value, 0, 64); err == nil {
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return v >= 0
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}
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return false
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}
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func IsInteger(value string) bool {
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if _, err := strconv.ParseInt(value, 0, 64); err == nil {
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return true
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}
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return false
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}
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func EqualFloat64(a, b float64) bool {
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return math.Abs(a-b) <= float64EqualityThreshold
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}
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