59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
package ssob
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"reflect"
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"sync"
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)
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type Encoder struct {
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mutex sync.Mutex
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w io.Writer
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}
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func NewEncoder(w io.Writer) *Encoder {
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enc := new(Encoder)
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enc.w = w
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return enc
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}
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func (enc *Encoder) Encode(e interface{}) (err error) {
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return enc.EncodeValue(reflect.ValueOf(e))
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}
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func (enc *Encoder) EncodeValue(value reflect.Value) (err error) {
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if value.Type() == reflect.TypeOf(errors.New("")) || value.Type() == reflect.TypeOf((*error)(nil)).Elem() {
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if value.IsNil() {
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return enc.Encode(string(""))
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} else {
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return enc.Encode(value.Interface().(error).Error())
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}
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}
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if value.Kind() == reflect.Invalid {
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return fmt.Errorf("ssob: Cannot encode nil: %w", ErrValueInvalid)
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}
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if value.Kind() == reflect.Ptr && value.IsNil() {
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return fmt.Errorf("ssob: Cannot encode nil of type %s: %w", value.Type().String(), ErrValueInvalid)
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}
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bb, err := marshal(value.Interface())
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if err != nil {
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return err
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}
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bl := MarshalInt32(int32(len(bb)))
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w := make([]byte, 4+len(bb))
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copy(w, bl)
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copy(w[4:], bb)
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enc.mutex.Lock()
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defer enc.mutex.Unlock()
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return binary.Write(enc.w, binary.BigEndian, w)
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}
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