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32 lines
614 B
32 lines
614 B
package data
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import (
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"encoding/binary"
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"fmt"
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"io"
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)
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type ColumnUint64 struct {
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}
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const SIZE_Uint64 = 8
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func (c *ColumnUint64) Read(buf []byte, readerAt io.ReaderAt, offset int64, i int64) uint64 {
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if n, err := readerAt.ReadAt(buf, offset+i*SIZE_Uint64); n == SIZE_Uint64 && err == nil {
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return binary.BigEndian.Uint64(buf)
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}
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return 0
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}
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func WriteUint64s(buf []byte, data []uint64) (err error) {
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off := 0
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size := len(data)
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if len(buf) < size<<3 {
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return fmt.Errorf("buf too small")
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}
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for _, dat := range data {
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binary.BigEndian.PutUint64(buf[off:], dat)
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off += SIZE_Uint64
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}
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return nil
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}
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