mirror of
https://github.com/nabbar/golib.git
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141 lines
3.2 KiB
Go
141 lines
3.2 KiB
Go
/*
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* MIT License
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*
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* Copyright (c) 2020 Nicolas JUHEL
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package network
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import (
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"fmt"
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"math"
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"sort"
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"strings"
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)
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const (
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_MaxSizeOfPad_ = 4
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_PadIntPattern_ = "%4d"
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_PowerYotta_ = 24
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_PowerZetta_ = 21
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_PowerExa_ = 18
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_PowerPeta_ = 15
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_PowerTera_ = 12
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_PowerGiga_ = 9
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_PowerMega_ = 6
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_PowerKilo_ = 3
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_PowerUnit_ = 0
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)
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type Number uint64
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func (n Number) String() string {
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return fmt.Sprintf("%d", n)
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}
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func (n Number) FormatUnitFloat(precision int) string {
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if precision < 1 {
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return n.FormatUnitInt()
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}
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m := float64(n)
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f := fmt.Sprintf("%%.%df", precision)
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for _, p := range powerList() {
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if m < math.Pow10(p+1) {
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continue
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}
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r := m / math.Pow10(p)
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q := strings.SplitN(fmt.Sprintf(f, r), ".", 2)
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if len(q) > 0 {
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if len(q[0]) < _MaxSizeOfPad_ {
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return strings.Repeat(" ", _MaxSizeOfPad_-len(q[0])) + fmt.Sprintf(f+" %s", r, power2Unit(p))
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}
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return fmt.Sprintf(f+" %s", r, power2Unit(p))
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}
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}
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return strings.Repeat(" ", _MaxSizeOfPad_) + fmt.Sprintf(f+" %s", m, " ")
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}
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func (n Number) FormatUnitInt() string {
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m := float64(n)
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for _, p := range powerList() {
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if m < math.Pow10(p+1) {
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continue
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}
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r := int(math.Round(m / math.Pow10(p)))
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return fmt.Sprintf(_PadIntPattern_+" %s", r, power2Unit(p))
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}
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return fmt.Sprintf(_PadIntPattern_+" %s", n, " ")
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}
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func (n Number) AsBytes() Bytes {
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return Bytes(n)
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}
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func (n Number) AsUint64() uint64 {
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return uint64(n)
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}
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func (n Number) AsFloat64() float64 {
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return float64(n)
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}
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func power2Unit(power int) string {
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switch {
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case power >= _PowerYotta_:
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return "Y"
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case power >= _PowerZetta_:
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return "Z"
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case power >= _PowerExa_:
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return "E"
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case power >= _PowerPeta_:
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return "P"
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case power >= _PowerTera_:
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return "T"
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case power >= _PowerGiga_:
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return "G"
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case power >= _PowerMega_:
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return "M"
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case power >= _PowerKilo_:
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return "K"
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case power >= _PowerUnit_:
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return ""
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}
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return ""
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}
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func powerList() []int {
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var p = []int{_PowerYotta_, _PowerZetta_, _PowerExa_, _PowerPeta_, _PowerTera_, _PowerGiga_, _PowerMega_, _PowerKilo_, _PowerUnit_}
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sort.Sort(sort.Reverse(sort.IntSlice(p)))
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return p
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}
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