85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
// Copyright 2014 The Macaron Authors
|
|
//
|
|
// 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 cache
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/gob"
|
|
"errors"
|
|
)
|
|
|
|
func EncodeGob(item *Item) ([]byte, error) {
|
|
buf := bytes.NewBuffer(nil)
|
|
err := gob.NewEncoder(buf).Encode(item)
|
|
return buf.Bytes(), err
|
|
}
|
|
|
|
func DecodeGob(data []byte, out *Item) error {
|
|
buf := bytes.NewBuffer(data)
|
|
return gob.NewDecoder(buf).Decode(&out)
|
|
}
|
|
|
|
func Incr(val interface{}) (interface{}, error) {
|
|
switch val.(type) {
|
|
case int:
|
|
val = val.(int) + 1
|
|
case int32:
|
|
val = val.(int32) + 1
|
|
case int64:
|
|
val = val.(int64) + 1
|
|
case uint:
|
|
val = val.(uint) + 1
|
|
case uint32:
|
|
val = val.(uint32) + 1
|
|
case uint64:
|
|
val = val.(uint64) + 1
|
|
default:
|
|
return val, errors.New("item value is not int-type")
|
|
}
|
|
return val, nil
|
|
}
|
|
|
|
func Decr(val interface{}) (interface{}, error) {
|
|
switch val.(type) {
|
|
case int:
|
|
val = val.(int) - 1
|
|
case int32:
|
|
val = val.(int32) - 1
|
|
case int64:
|
|
val = val.(int64) - 1
|
|
case uint:
|
|
if val.(uint) > 0 {
|
|
val = val.(uint) - 1
|
|
} else {
|
|
return val, errors.New("item value is less than 0")
|
|
}
|
|
case uint32:
|
|
if val.(uint32) > 0 {
|
|
val = val.(uint32) - 1
|
|
} else {
|
|
return val, errors.New("item value is less than 0")
|
|
}
|
|
case uint64:
|
|
if val.(uint64) > 0 {
|
|
val = val.(uint64) - 1
|
|
} else {
|
|
return val, errors.New("item value is less than 0")
|
|
}
|
|
default:
|
|
return val, errors.New("item value is not int-type")
|
|
}
|
|
return val, nil
|
|
}
|