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wal: minor fixes

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- remove unnecessary type cast
- simply modulo operations
This commit is contained in:
Gyu-Ho Lee 2016-06-06 08:28:40 -07:00
parent c63eaf45f9
commit 008081ffb5
1 changed files with 5 additions and 6 deletions
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11
wal/encoder.go
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@ -70,7 +70,7 @@ func (e *encoder) encode(rec *walpb.Record) error {
}
lenField, padBytes := encodeFrameSize(len(data))
if err = writeInt64(e.bw, int64(lenField), e.uint64buf); err != nil {
if err = writeUint64(e.bw, lenField, e.uint64buf); err != nil {
return err
}
@ -84,10 +84,9 @@ func (e *encoder) encode(rec *walpb.Record) error {
func encodeFrameSize(dataBytes int) (lenField uint64, padBytes int) {
lenField = uint64(dataBytes)
// force 8 byte alignment so length never gets a torn write
if padBytes = 8 - (dataBytes % 8); padBytes != 8 {
padBytes = (8 - (dataBytes % 8)) % 8
if padBytes != 0 {
lenField |= uint64(0x80|padBytes) << 56
} else {
padBytes = 0
}
return
}
@ -98,9 +97,9 @@ func (e *encoder) flush() error {
return e.bw.Flush()
}
func writeInt64(w io.Writer, n int64, buf []byte) error {
func writeUint64(w io.Writer, n uint64, buf []byte) error {
// http://golang.org/src/encoding/binary/binary.go
binary.LittleEndian.PutUint64(buf, uint64(n))
binary.LittleEndian.PutUint64(buf, n)
_, err := w.Write(buf)
return err
}