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package encode |
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import ( |
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"encoding" |
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"reflect" |
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"sync" |
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"github.com/et-nik/binngo/binn" |
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) |
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type encoderFunc func(v reflect.Value) ([]byte, error) |
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var encoderCache sync.Map // map[reflect.Type]encoderFunc |
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var ( |
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marshalerType = reflect.TypeOf((*Marshaler)(nil)).Elem() |
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textMarshalerType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem() |
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) |
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type Marshaler interface { |
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MarshalBINN() ([]byte, error) |
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} |
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func marshal(v interface{}) ([]byte, error) { |
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1 |
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rv := reflect.ValueOf(v) |
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1 |
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if !rv.IsValid() { |
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return nil, ErrInvalidValue |
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} |
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1 |
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if !rv.IsValid() { |
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return nil, ErrInvalidValue |
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} |
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1 |
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enc := loadEncodeFunc(rv.Type()) |
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1 |
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return enc(rv) |
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} |
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func loadEncodeFunc(t reflect.Type) encoderFunc { |
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1 |
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if fi, ok := encoderCache.Load(t); ok { |
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1 |
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return fi.(encoderFunc) |
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} |
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1 |
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var ( |
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wg sync.WaitGroup |
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f encoderFunc |
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) |
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1 |
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wg.Add(1) |
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1 |
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fi, loaded := encoderCache.LoadOrStore(t, encoderFunc(func(v reflect.Value) ([]byte, error) { |
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wg.Wait() |
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return f(v) |
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})) |
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1 |
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if loaded { |
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return fi.(encoderFunc) |
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} |
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1 |
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f = newTypeEncoder(t) |
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1 |
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wg.Done() |
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1 |
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encoderCache.Store(t, f) |
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return f |
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} |
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func newTypeEncoder(t reflect.Type) encoderFunc { |
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1 |
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if t.Implements(marshalerType) { |
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1 |
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return marshalerEncoder |
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} |
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1 |
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if t.Implements(textMarshalerType) { |
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return textMarshalerEncoder |
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} |
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1 |
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switch t.Kind() { |
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case reflect.Bool: |
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return func(v reflect.Value) ([]byte, error) { |
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if v.Bool() { |
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return []byte{binn.True}, nil |
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} |
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return []byte{binn.False}, nil |
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} |
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case reflect.Struct: |
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1 |
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return newStructEncoder(t) |
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case reflect.Map: |
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1 |
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return newMapEncoder(t) |
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case reflect.Interface: |
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1 |
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return func(v reflect.Value) ([]byte, error) { |
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1 |
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if v.IsNil() { |
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return []byte{binn.Null}, nil |
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} |
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1 |
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return loadEncodeFunc(v.Elem().Type())(v.Elem()) |
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} |
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case reflect.String: |
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1 |
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return func(v reflect.Value) ([]byte, error) { |
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var bytes []byte |
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bytes = append(bytes, Uint8(binn.StringType)...) |
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bytes = append(bytes, String(v.String())...) |
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bytes = append(bytes, 0x00) |
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return bytes, nil |
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} |
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
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1 |
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return func(v reflect.Value) ([]byte, error) { |
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var bytes []byte |
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bytes = append(bytes, Uint8(uint8(detectIntType(int(v.Int()))))...) |
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bytes = append(bytes, Int(int(v.Int()))...) |
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1 |
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return bytes, nil |
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} |
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
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return func(v reflect.Value) ([]byte, error) { |
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var bytes []byte |
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bytes = append(bytes, Uint8(uint8(detectUintType(uint(v.Uint()))))...) |
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bytes = append(bytes, Uint(uint(v.Uint()))...) |
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return bytes, nil |
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} |
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case reflect.Float32: |
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return func(v reflect.Value) ([]byte, error) { |
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var bytes []byte |
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bytes = append(bytes, Uint8(binn.Float32Type)...) |
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bytes = append(bytes, Float32(float32(v.Float()))...) |
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return bytes, nil |
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} |
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case reflect.Float64: |
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return func(v reflect.Value) ([]byte, error) { |
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var bytes []byte |
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bytes = append(bytes, Uint8(binn.Float64Type)...) |
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bytes = append(bytes, Float64(v.Float())...) |
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return bytes, nil |
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} |
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case reflect.Slice, reflect.Array: |
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1 |
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return newArrayEncoder(t) |
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case reflect.Ptr: |
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return newPtrEncoder(t) |
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} |
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144
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return func(v reflect.Value) ([]byte, error) { |
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return nil, &UnsupportedTypeError{t} |
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} |
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} |
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148
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149
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func marshalerEncoder(v reflect.Value) ([]byte, error) { |
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150
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1 |
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if v.Kind() == reflect.Ptr && v.IsNil() { |
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151
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return []byte{0x00}, nil |
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} |
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153
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1 |
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m, ok := v.Interface().(Marshaler) |
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154
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1 |
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if !ok { |
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return []byte{0x00}, nil |
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156
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} |
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157
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1 |
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b, err := m.MarshalBINN() |
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158
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1 |
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if err != nil { |
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159
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return nil, &MarshalerError{v.Type(), err, "MarshalBINN"} |
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160
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} |
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161
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162
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1 |
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return b, nil |
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163
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} |
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164
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et-nik /
binngo
