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int65.go
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int65.go
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/*
* Copyright 2022 ByteDance Inc.
*
* 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 ssa
import (
`math`
`math/bits`
`strconv`
)
var (
MinInt65 = Int65 { 0, 1 }
MaxInt65 = Int65 { math.MaxUint64, 0 }
)
const (
_MinInt65Str = "-18446744073709551616"
)
type Int65 struct {
u uint64
s uint64
}
func Int65i(v int64) Int65 {
return Int65 {
u: uint64(v),
s: uint64(v) >> 63,
}
}
func (self Int65) String() string {
if self.s == 0 {
return strconv.FormatUint(self.u, 10)
} else if self.u != 0 {
return "-" + strconv.FormatUint(-self.u, 10)
} else {
return _MinInt65Str
}
}
func (self Int65) OneLess() (r Int65) {
r.u, r.s = bits.Sub64(self.u, 1, 0)
r.s = (self.s - r.s) & 1
return
}
func (self Int65) OneMore() (r Int65) {
r.u, r.s = bits.Add64(self.u, 1, 0)
r.s = (self.s + r.s) & 1
return
}
func (self Int65) Compare(other Int65) int {
if self.s == 0 && other.s != 0 {
return 1
} else if self.s != 0 && other.s == 0 {
return -1
} else {
return cmpu64(self.u, other.u)
}
}
func (self Int65) CompareZero() int {
if self.s != 0 {
return -1
} else if self.u != 0 {
return 1
} else {
return 0
}
}