ml
28 lines
715 B
Go
28 lines
715 B
Go
package serial
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import "io"
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// PositioningDecoder is a Decoder with positioning capabilities.
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type PositioningDecoder struct {
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Decoder
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seeker io.Seeker
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}
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// NewPositioningDecoder creates a new PositioningDecoder from given reader.
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func NewPositioningDecoder(source io.ReadSeeker) *PositioningDecoder {
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return &PositioningDecoder{Decoder: Decoder{source: source, offset: 0}, seeker: source}
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}
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// SetCurPos changes the encoding position to the specified absolute offset.
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func (coder *PositioningDecoder) SetCurPos(offset uint32) {
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if coder.firstError != nil {
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return
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}
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_, coder.firstError = coder.seeker.Seek(int64(offset), io.SeekStart)
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if coder.firstError != nil {
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return
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}
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coder.offset = offset
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}
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