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compare.go
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compare.go
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// Copyright (c) 2014 Dataence, LLC. All rights reserved.
//
// 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.
//
// Taken from github.com/surgebase/compare after package disappeared.
package gocassa
import (
"fmt"
"reflect"
)
func builtinLessThan(k1, k2 interface{}) (bool, error) {
if reflect.TypeOf(k1) != reflect.TypeOf(k2) {
return false, fmt.Errorf("skiplist/BuiltinLessThan: k1.(%s) and k2.(%s) have different types",
reflect.TypeOf(k1).Name(), reflect.TypeOf(k2).Name())
}
switch k1 := k1.(type) {
case string:
return k1 < k2.(string), nil
case int64:
return k1 < k2.(int64), nil
case int32:
return k1 < k2.(int32), nil
case int16:
return k1 < k2.(int16), nil
case int8:
return k1 < k2.(int8), nil
case int:
return k1 < k2.(int), nil
case float32:
return k1 < k2.(float32), nil
case float64:
return k1 < k2.(float64), nil
case uint:
return k1 < k2.(uint), nil
case uint8:
return k1 < k2.(uint8), nil
case uint16:
return k1 < k2.(uint16), nil
case uint32:
return k1 < k2.(uint32), nil
case uint64:
return k1 < k2.(uint64), nil
case uintptr:
return k1 < k2.(uintptr), nil
}
return false, fmt.Errorf("skiplist/BuiltinLessThan: unsupported types for k1.(%s) and k2.(%s)",
reflect.TypeOf(k1).Name(), reflect.TypeOf(k2).Name())
}
func builtinGreaterThan(k1, k2 interface{}) (bool, error) {
if reflect.TypeOf(k1) != reflect.TypeOf(k2) {
return false, fmt.Errorf("skiplist/BuiltinGreaterThan: k1.(%s) and k2.(%s) have different types",
reflect.TypeOf(k1).Name(), reflect.TypeOf(k2).Name())
}
switch k1 := k1.(type) {
case string:
return k1 > k2.(string), nil
case int64:
return k1 > k2.(int64), nil
case int32:
return k1 > k2.(int32), nil
case int16:
return k1 > k2.(int16), nil
case int8:
return k1 > k2.(int8), nil
case int:
return k1 > k2.(int), nil
case float32:
return k1 > k2.(float32), nil
case float64:
return k1 > k2.(float64), nil
case uint:
return k1 > k2.(uint), nil
case uint8:
return k1 > k2.(uint8), nil
case uint16:
return k1 > k2.(uint16), nil
case uint32:
return k1 > k2.(uint32), nil
case uint64:
return k1 > k2.(uint64), nil
case uintptr:
return k1 > k2.(uintptr), nil
}
return false, fmt.Errorf("skiplist/BuiltinGreaterThan: unsupported types for k1.(%s) and k2.(%s)",
reflect.TypeOf(k1).Name(), reflect.TypeOf(k2).Name())
}