45 lines
785 B
Go
45 lines
785 B
Go
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package wal
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import "encoding/binary"
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type segmentHeader struct {
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CreatedAt int64
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ArchivedAt int64
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FirstSeqNum int64
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LastSeqNum int64 // FirstSeqNum - 1 if empty.
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LastTimestampMS int64 // 0 if empty.
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InsertAt int64
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}
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func (h segmentHeader) WriteTo(b []byte) {
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vals := []int64{
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h.CreatedAt,
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h.ArchivedAt,
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h.FirstSeqNum,
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h.LastSeqNum,
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h.LastTimestampMS,
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h.InsertAt,
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}
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for _, val := range vals {
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binary.LittleEndian.PutUint64(b[0:8], uint64(val))
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b = b[8:]
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}
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}
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func (h *segmentHeader) ReadFrom(b []byte) {
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ptrs := []*int64{
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&h.CreatedAt,
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&h.ArchivedAt,
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&h.FirstSeqNum,
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&h.LastSeqNum,
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&h.LastTimestampMS,
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&h.InsertAt,
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}
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for _, ptr := range ptrs {
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*ptr = int64(binary.LittleEndian.Uint64(b[0:8]))
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b = b[8:]
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}
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}
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