104 lines
2.1 KiB
Go
104 lines
2.1 KiB
Go
package ledis
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import (
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"encoding/binary"
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"errors"
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"strconv"
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"github.com/siddontang/go/hack"
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)
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var errIntNumber = errors.New("invalid integer")
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/*
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Below I forget why I use little endian to store int.
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Maybe I was foolish at that time.
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*/
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// Int64 gets 64 integer with the little endian format.
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func Int64(v []byte, err error) (int64, error) {
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if err != nil {
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return 0, err
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} else if v == nil || len(v) == 0 {
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return 0, nil
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} else if len(v) != 8 {
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return 0, errIntNumber
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}
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return int64(binary.LittleEndian.Uint64(v)), nil
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}
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// Uint64 gets unsigned 64 integer.
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func Uint64(v []byte, err error) (uint64, error) {
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if err != nil {
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return 0, err
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} else if v == nil || len(v) == 0 {
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return 0, nil
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} else if len(v) != 8 {
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return 0, errIntNumber
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}
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return binary.LittleEndian.Uint64(v), nil
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}
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// PutInt64 puts the 64 integer.
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func PutInt64(v int64) []byte {
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b := make([]byte, 8)
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binary.LittleEndian.PutUint64(b, uint64(v))
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return b
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}
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// StrInt64 gets the 64 integer with string format.
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func StrInt64(v []byte, err error) (int64, error) {
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if err != nil {
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return 0, err
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} else if v == nil {
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return 0, nil
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} else {
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return strconv.ParseInt(hack.String(v), 10, 64)
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}
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}
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// StrUint64 gets the unsigned 64 integer with string format.
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func StrUint64(v []byte, err error) (uint64, error) {
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if err != nil {
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return 0, err
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} else if v == nil {
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return 0, nil
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} else {
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return strconv.ParseUint(hack.String(v), 10, 64)
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}
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}
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// StrInt32 gets the 32 integer with string format.
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func StrInt32(v []byte, err error) (int32, error) {
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if err != nil {
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return 0, err
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} else if v == nil {
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return 0, nil
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} else {
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res, err := strconv.ParseInt(hack.String(v), 10, 32)
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return int32(res), err
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}
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}
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// StrInt8 ets the 8 integer with string format.
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func StrInt8(v []byte, err error) (int8, error) {
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if err != nil {
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return 0, err
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} else if v == nil {
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return 0, nil
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} else {
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res, err := strconv.ParseInt(hack.String(v), 10, 8)
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return int8(res), err
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}
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}
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// AsyncNotify notices the channel.
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func AsyncNotify(ch chan struct{}) {
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select {
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case ch <- struct{}{}:
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default:
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}
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}
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