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- 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
- }
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