44 lines
972 B
Go
44 lines
972 B
Go
package metainfo
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import "github.com/anacrolix/torrent/bencode"
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// A wrapper around Info that exposes the Bytes directly, in case marshalling
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// and unmarshalling Info doesn't produce the same bytes.
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type InfoEx struct {
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Info
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// Set when unmarshalling, and used when marshalling. Call .UpdateBytes to
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// set it by bencoding Info.
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Bytes []byte
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}
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var (
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_ bencode.Marshaler = &InfoEx{}
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_ bencode.Unmarshaler = &InfoEx{}
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)
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// Marshals .Info, and sets .Bytes with the result.
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func (ie *InfoEx) UpdateBytes() {
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var err error
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ie.Bytes, err = bencode.Marshal(&ie.Info)
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if err != nil {
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panic(err)
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}
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}
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// Returns the SHA1 hash of .Bytes.
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func (ie *InfoEx) Hash() Hash {
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return HashBytes(ie.Bytes)
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}
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func (ie *InfoEx) UnmarshalBencode(data []byte) error {
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ie.Bytes = append([]byte(nil), data...)
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return bencode.Unmarshal(data, &ie.Info)
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}
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func (ie *InfoEx) MarshalBencode() ([]byte, error) {
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if ie.Bytes == nil {
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ie.UpdateBytes()
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}
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return ie.Bytes, nil
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}
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