ByteBlockReader.seek_key_after_validation: def of mylsm-lsm-store@0.6.0.1
Import: import mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend as ByteBlockReader
Lines 921-938 of mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend: https://jend.leeeet.dev/read.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&start_line=921&end_line=938

import Base
import mylsm-lsm-store@0.6.0.1/src/scan/BlockRoutePolicy.bend as BlockRoutePolicy
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes

# Routes a lower key to the last block whose separator does not exceed it.
def seek_key_after_validation(
  reader: Reader,
  key: Bytes.Bytes
) -> IO(Result<&1, &1, U32 & String, Reader>):
  match reader:
    case Reader{file, state}:
      match state:
        case State{+size, header, +index_offset, used, total,
            +block_count, next_block, decoded, root_hash, index_hash,
            last_key, selected}:
          +count = U32.to_nat(block_count)
          +fuel = Nat.add(Nat.mul(8n, count), 8n)
          context : RouteContext = RouteContext{size, index_offset, count}
          retained_state : State = State{size, header, index_offset, used, total, block_count,
            next_block, decoded, root_hash, index_hash, last_key, selected}
          route.loop(fuel, RouteNeed{file, retained_state, context, key,
            BlockRoutePolicy.Search{0n, count, 0n}})

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/BlockRoutePolicy.bend&name=Search
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&name=Reader
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&name=RouteContext
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&name=RouteState
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&name=State
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend&name=route.loop