hugo math 源码
hugo math 代码
文件路径:/tpl/math/math.go
// Copyright 2017 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package math provides template functions for mathematical operations.
package math
import (
"errors"
"math"
"sync/atomic"
_math "github.com/gohugoio/hugo/common/math"
"github.com/spf13/cast"
)
// New returns a new instance of the math-namespaced template functions.
func New() *Namespace {
return &Namespace{}
}
// Namespace provides template functions for the "math" namespace.
type Namespace struct{}
// Add adds the two addends n1 and n2.
func (ns *Namespace) Add(n1, n2 any) (any, error) {
return _math.DoArithmetic(n1, n2, '+')
}
// Ceil returns the least integer value greater than or equal to n.
func (ns *Namespace) Ceil(n any) (float64, error) {
xf, err := cast.ToFloat64E(n)
if err != nil {
return 0, errors.New("Ceil operator can't be used with non-float value")
}
return math.Ceil(xf), nil
}
// Div divides n1 by n2.
func (ns *Namespace) Div(n1, n2 any) (any, error) {
return _math.DoArithmetic(n1, n2, '/')
}
// Floor returns the greatest integer value less than or equal to n.
func (ns *Namespace) Floor(n any) (float64, error) {
xf, err := cast.ToFloat64E(n)
if err != nil {
return 0, errors.New("Floor operator can't be used with non-float value")
}
return math.Floor(xf), nil
}
// Log returns the natural logarithm of the number n.
func (ns *Namespace) Log(n any) (float64, error) {
af, err := cast.ToFloat64E(n)
if err != nil {
return 0, errors.New("Log operator can't be used with non integer or float value")
}
return math.Log(af), nil
}
// Max returns the greater of the two numbers n1 or n2.
func (ns *Namespace) Max(n1, n2 any) (float64, error) {
af, erra := cast.ToFloat64E(n1)
bf, errb := cast.ToFloat64E(n2)
if erra != nil || errb != nil {
return 0, errors.New("Max operator can't be used with non-float value")
}
return math.Max(af, bf), nil
}
// Min returns the smaller of two numbers n1 or n2.
func (ns *Namespace) Min(n1, n2 any) (float64, error) {
af, erra := cast.ToFloat64E(n1)
bf, errb := cast.ToFloat64E(n2)
if erra != nil || errb != nil {
return 0, errors.New("Min operator can't be used with non-float value")
}
return math.Min(af, bf), nil
}
// Mod returns n1 % n2.
func (ns *Namespace) Mod(n1, n2 any) (int64, error) {
ai, erra := cast.ToInt64E(n1)
bi, errb := cast.ToInt64E(n2)
if erra != nil || errb != nil {
return 0, errors.New("modulo operator can't be used with non integer value")
}
if bi == 0 {
return 0, errors.New("the number can't be divided by zero at modulo operation")
}
return ai % bi, nil
}
// ModBool returns the boolean of n1 % n2. If n1 % n2 == 0, return true.
func (ns *Namespace) ModBool(n1, n2 any) (bool, error) {
res, err := ns.Mod(n1, n2)
if err != nil {
return false, err
}
return res == int64(0), nil
}
// Mul multiplies the two numbers n1 and n2.
func (ns *Namespace) Mul(n1, n2 any) (any, error) {
return _math.DoArithmetic(n1, n2, '*')
}
// Pow returns n1 raised to the power of n2.
func (ns *Namespace) Pow(n1, n2 any) (float64, error) {
af, erra := cast.ToFloat64E(n1)
bf, errb := cast.ToFloat64E(n2)
if erra != nil || errb != nil {
return 0, errors.New("Pow operator can't be used with non-float value")
}
return math.Pow(af, bf), nil
}
// Round returns the integer nearest to n, rounding half away from zero.
func (ns *Namespace) Round(n any) (float64, error) {
xf, err := cast.ToFloat64E(n)
if err != nil {
return 0, errors.New("Round operator can't be used with non-float value")
}
return _round(xf), nil
}
// Sqrt returns the square root of the number n.
func (ns *Namespace) Sqrt(n any) (float64, error) {
af, err := cast.ToFloat64E(n)
if err != nil {
return 0, errors.New("Sqrt operator can't be used with non integer or float value")
}
return math.Sqrt(af), nil
}
// Sub subtracts n2 from n1.
func (ns *Namespace) Sub(n1, n2 any) (any, error) {
return _math.DoArithmetic(n1, n2, '-')
}
var counter uint64
// Counter increments and returns a global counter.
// This was originally added to be used in tests where now.UnixNano did not
// have the needed precision (especially on Windows).
// Note that given the parallel nature of Hugo, you cannot use this to get sequences of numbers,
// and the counter will reset on new builds.
func (ns *Namespace) Counter() uint64 {
return atomic.AddUint64(&counter, uint64(1))
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦