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package exifundefined
import (
"encoding/binary"
"github.com/dsoprea/go-logging"
"github.com/dsoprea/go-exif/v3/common"
)
// Encode encodes the given encodeable undefined value to bytes.
func Encode(value EncodeableValue, byteOrder binary.ByteOrder) (encoded []byte, unitCount uint32, err error) {
defer func() {
if state := recover(); state != nil {
err = log.Wrap(state.(error))
}
}()
encoderName := value.EncoderName()
encoder, found := encoders[encoderName]
if found == false {
log.Panicf("no encoder registered for type [%s]", encoderName)
}
encoded, unitCount, err = encoder.Encode(value, byteOrder)
log.PanicIf(err)
return encoded, unitCount, nil
}
// Decode constructs a value from raw encoded bytes
func Decode(valueContext *exifcommon.ValueContext) (value EncodeableValue, err error) {
defer func() {
if state := recover(); state != nil {
err = log.Wrap(state.(error))
}
}()
uth := UndefinedTagHandle{
IfdPath: valueContext.IfdPath(),
TagId: valueContext.TagId(),
}
decoder, found := decoders[uth]
if found == false {
// We have no choice but to return the error. We have no way of knowing how
// much data there is without already knowing what data-type this tag is.
return nil, exifcommon.ErrUnhandledUndefinedTypedTag
}
value, err = decoder.Decode(valueContext)
if err != nil {
if err == ErrUnparseableValue {
return nil, err
}
log.Panic(err)
}
return value, nil
}
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