40 lines
1.3 KiB
Go
40 lines
1.3 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package common
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import "math"
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// DefaultDecimalPlacesCount is the default number of decimal places
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const DefaultDecimalPlacesCount = 4
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// Round rounds the given float64 value and ensures that it has a maximum of
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// "precision" decimal places.
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func Round(val float64, precision int64) (newVal float64) {
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var round float64
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pow := math.Pow(10, float64(precision))
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digit := pow * val
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_, div := math.Modf(digit)
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if div >= 0.5 {
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round = math.Ceil(digit)
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} else {
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round = math.Floor(digit)
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}
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newVal = round / pow
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return
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}
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