github.com/XiaoMi/Gaea@v1.2.5/parser/tidb-types/compare.go (about)

     1  // Copyright 2015 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package types
    15  
    16  // CompareInt64 returns an integer comparing the int64 x to y.
    17  func CompareInt64(x, y int64) int {
    18  	if x < y {
    19  		return -1
    20  	} else if x == y {
    21  		return 0
    22  	}
    23  
    24  	return 1
    25  }
    26  
    27  // CompareUint64 returns an integer comparing the uint64 x to y.
    28  func CompareUint64(x, y uint64) int {
    29  	if x < y {
    30  		return -1
    31  	} else if x == y {
    32  		return 0
    33  	}
    34  
    35  	return 1
    36  }
    37  
    38  // CompareFloat64 returns an integer comparing the float64 x to y.
    39  func CompareFloat64(x, y float64) int {
    40  	if x < y {
    41  		return -1
    42  	} else if x == y {
    43  		return 0
    44  	}
    45  
    46  	return 1
    47  }
    48  
    49  // CompareString returns an integer comparing the string x to y.
    50  func CompareString(x, y string) int {
    51  	if x < y {
    52  		return -1
    53  	} else if x == y {
    54  		return 0
    55  	}
    56  
    57  	return 1
    58  }