Method setDict

zstd/decoder.go:942–957

(frame *frameDec)

}

func (d *Decoder) setDict(frame *frameDec) (err error) {
	dict, ok := d.o.dicts[frame.DictionaryID]
	if ok {
		if debugDecoder {
			println("setting dict", frame.DictionaryID)
		}
		frame.history.setDict(dict)
	} else if frame.DictionaryID != 0 {
		// A zero or missing dictionary id is ambiguous:
		// either dictionary zero, or no dictionary. In particular,
		// zstd --patch-from uses this id for the source file,
		// so only return an error if the dictionary id is not zero.
		err = ErrUnknownDictionary
	}
	return err
}