forked from ontio/ontology
/
fixed64.go
75 lines (65 loc) · 1.69 KB
/
fixed64.go
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/*
* Copyright (C) 2018 The ontology Authors
* This file is part of The ontology library.
*
* The ontology is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ontology is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The ontology. If not, see <http://www.gnu.org/licenses/>.
*/
package common
import (
"bytes"
"io"
"strconv"
)
//the 64 bit fixed-point number, precise 10^-8
type Fixed64 int64
const (
Decimal = 100000000
)
func (f *Fixed64) Serialization(sink *ZeroCopySink) {
sink.WriteInt64(int64(*f))
}
func (f *Fixed64) Deserialization(source *ZeroCopySource) error {
var eof bool
t, eof := source.NextInt64()
if eof {
return io.ErrUnexpectedEOF
}
*f = Fixed64(t)
return nil
}
func FromDecimal(value int64) Fixed64 {
return Fixed64(value * Decimal)
}
func (f Fixed64) GetData() int64 {
return int64(f)
}
func (f Fixed64) String() string {
var buffer bytes.Buffer
value := int64(f)
if value < 0 {
buffer.WriteRune('-')
value = -value
}
buffer.WriteString(strconv.FormatInt(value/100000000, 10))
value %= 100000000
if value > 0 {
buffer.WriteRune('.')
s := strconv.FormatInt(value, 10)
for i := len(s); i < 8; i++ {
buffer.WriteRune('0')
}
buffer.WriteString(s)
}
return buffer.String()
}