depot/go/nix/nixwire/nixwire.go

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package nixwire
import (
"encoding/binary"
"io"
)
type Serializer struct {
io.Writer
}
func (w Serializer) WritePadding(n int64) (int64, error) {
if n%8 > 0 {
n, err := w.Write(make([]byte, 8-(n%8)))
return int64(n), err
}
return 0, nil
}
func (w Serializer) WriteUint64(n uint64) (int64, error) {
buf := make([]byte, 8)
binary.LittleEndian.PutUint64(buf, n)
wrote, err := w.Write(buf)
return int64(wrote), err
}
func (w Serializer) WriteString(s string) (int64, error) {
nSize, err := w.WriteUint64(uint64(len(s)))
if err != nil {
return int64(nSize), err
}
nData, err := w.Write([]byte(s))
if err != nil {
return int64(nSize) + int64(nData), err
}
nPad, err := w.WritePadding(int64(len(s)))
return int64(nSize) + int64(nData) + int64(nPad), err
}