// This example demonstrates how to use Unmarshal to decode XDR encoded data from
// a byte slice into a struct.
func ExampleUnmarshal() {
// Hypothetical image header format.
type ImageHeader struct {
Signature [3]byte
Version uint32
IsGrayscale bool
NumSections uint32
}
// XDR encoded data described by the above structure. Typically this would
// be read from a file or across the network, but use a manual byte array
// here as an example.
encodedData := []byte{
0xAB, 0xCD, 0xEF, 0x00, // Signature
0x00, 0x00, 0x00, 0x02, // Version
0x00, 0x00, 0x00, 0x01, // IsGrayscale
0x00, 0x00, 0x00, 0x0A} // NumSections
// Declare a variable to provide Unmarshal with a concrete type and instance
// to decode into.
var h ImageHeader
remainingBytes, err := xdr.Unmarshal(encodedData, &h)
if err != nil {
fmt.Println(err)
return
}
fmt.Println("remainingBytes:", remainingBytes)
fmt.Printf("h: %+v", h)
// Output:
// remainingBytes: []
// h: {Signature:[171 205 239] Version:2 IsGrayscale:true NumSections:10}
}
func BenchmarkReflUnmarshal(b *testing.B) {
var t XDRBenchStruct
for i := 0; i < b.N; i++ {
_, err := refl.Unmarshal(e, &t)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkUnmarshal(b *testing.B) {
b.StopTimer()
// Hypothetical image header format.
type ImageHeader struct {
Signature [3]byte
Version uint32
IsGrayscale bool
NumSections uint32
}
// XDR encoded data described by the above structure.
encodedData := []byte{
0xAB, 0xCD, 0xEF, 0x00,
0x00, 0x00, 0x00, 0x02,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x0A}
var h ImageHeader
b.StartTimer()
for i := 0; i < b.N; i++ {
_, _ = xdr.Unmarshal(encodedData, &h)
}
b.SetBytes(int64(len(encodedData)))
}
func (x XdrSerializer) Unmarshal(d []byte, o interface{}) error {
_, err := xdr.Unmarshal(d, o)
return err
}
