112 lines
2.7 KiB
Go
112 lines
2.7 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package types
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import (
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"cmp"
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"math"
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"github.com/pingcap/tidb/pkg/util/collate"
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)
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// VecCompareUU returns []int64 comparing the []uint64 x to []uint64 y
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func VecCompareUU(x, y []uint64, res []int64) {
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n := len(x)
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for i := range n {
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if x[i] < y[i] {
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res[i] = -1
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} else if x[i] == y[i] {
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res[i] = 0
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} else {
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res[i] = 1
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}
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}
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}
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// VecCompareII returns []int64 comparing the []int64 x to []int64 y
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func VecCompareII(x, y, res []int64) {
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n := len(x)
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for i := range n {
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if x[i] < y[i] {
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res[i] = -1
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} else if x[i] == y[i] {
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res[i] = 0
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} else {
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res[i] = 1
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}
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}
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}
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// VecCompareUI returns []int64 comparing the []uint64 x to []int64y
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func VecCompareUI(x []uint64, y, res []int64) {
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n := len(x)
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for i := range n {
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if y[i] < 0 || x[i] > math.MaxInt64 {
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res[i] = 1
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} else if int64(x[i]) < y[i] {
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res[i] = -1
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} else if int64(x[i]) == y[i] {
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res[i] = 0
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} else {
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res[i] = 1
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}
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}
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}
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// VecCompareIU returns []int64 comparing the []int64 x to []uint64y
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func VecCompareIU(x []int64, y []uint64, res []int64) {
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n := len(x)
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for i := range n {
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if x[i] < 0 || y[i] > math.MaxInt64 {
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res[i] = -1
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} else if x[i] < int64(y[i]) {
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res[i] = -1
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} else if x[i] == int64(y[i]) {
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res[i] = 0
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} else {
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res[i] = 1
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}
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}
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}
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// CompareString returns an integer comparing the string x to y with the specified collation and length.
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func CompareString(x, y, collation string) int {
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return collate.GetCollator(collation).Compare(x, y)
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}
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// CompareInt return an integer comparing the integer x to y with signed or unsigned.
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func CompareInt(arg0 int64, isUnsigned0 bool, arg1 int64, isUnsigned1 bool) int {
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var res int
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switch {
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case isUnsigned0 && isUnsigned1:
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res = cmp.Compare(uint64(arg0), uint64(arg1))
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case isUnsigned0 && !isUnsigned1:
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if arg1 < 0 || uint64(arg0) > math.MaxInt64 {
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res = 1
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} else {
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res = cmp.Compare(arg0, arg1)
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}
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case !isUnsigned0 && isUnsigned1:
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if arg0 < 0 || uint64(arg1) > math.MaxInt64 {
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res = -1
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} else {
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res = cmp.Compare(arg0, arg1)
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}
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case !isUnsigned0 && !isUnsigned1:
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res = cmp.Compare(arg0, arg1)
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}
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return res
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}
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