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excerpt.go
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/
excerpt.go
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package catalog
import (
"github.com/insolar/assured-ledger/ledger-core/rms"
"github.com/insolar/assured-ledger/ledger-core/rms/rmsbox"
"github.com/insolar/assured-ledger/ledger-core/rms/rmsreg"
"github.com/insolar/assured-ledger/ledger-core/vanilla/protokit"
)
type Excerpt = rms.RecordExcerptForCatalogEntry
const MaxExcerptFieldID = 39
const excerptTagSize = 2 // protokit.WireVarint.Tag(MaxExcerptFieldID).TagSize()
func stopAfterExcerpt(b []byte) (int, error) {
u, n := protokit.DecodeVarintFromBytes(b)
if n != excerptTagSize {
return 0, nil // it is something else
}
wt, err := protokit.SafeWireTag(u)
if err != nil {
return 0, err
}
if wt.FieldID() > MaxExcerptFieldID {
// NB! Fields MUST be sorted
return -1, nil // don't read other fields
}
return 0, nil
}
func ReadExcerptFromLazy(lazy rmsbox.LazyValueReader) (Excerpt, error) {
var r Excerpt
ok, err := lazy.UnmarshalAsAny(&r, stopAfterExcerpt)
if err != nil || !ok {
return Excerpt{}, err
}
return r, nil
}
func ReadExcerptFromBytes(b []byte) (Excerpt, error) {
var r Excerpt
if err := rmsreg.UnmarshalAs(b, &r, stopAfterExcerpt); err != nil {
return Excerpt{}, err
}
return r, nil
}