nimbus-eth1/nimbus/db/kvt/kvt_walk/walk_private.nim

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Nim

# Nimbus-eth1
# Copyright (c) 2023-2024 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or
# distributed except according to those terms.
import
std/[sets, tables],
eth/common,
".."/[kvt_desc, kvt_init, kvt_layers]
# ------------------------------------------------------------------------------
# Public generic iterators
# ------------------------------------------------------------------------------
iterator walkPairsImpl*[T](
db: KvtDbRef; # Database with top layer & backend filter
): tuple[key: Blob, data: Blob] =
## Walk over all `(VertexID,VertexRef)` in the database. Note that entries
## are unsorted.
var seen: HashSet[Blob]
for (key,data) in db.layersWalk seen:
if data.isValid:
yield (key,data)
when T isnot VoidBackendRef:
mixin walk
for (key,data) in db.backend.T.walk:
if key notin seen and data.isValid:
yield (key,data)
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------