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https://github.com/status-im/nimbus-eth1.git
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55 lines
1.7 KiB
Nim
55 lines
1.7 KiB
Nim
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# nimbus-eth1
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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## Rocks DB store data iterator
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## ============================
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##
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{.push raises: [].}
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import
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std/sequtils,
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eth/common,
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rocksdb,
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./rdb_desc
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# ------------------------------------------------------------------------------
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# Public iterators
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# ------------------------------------------------------------------------------
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iterator walk*(rdb: RdbInst): tuple[key: Blob, data: Blob] =
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## Walk over all key-value pairs of the database.
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##
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let rit = rdb.store.db.rocksdb_create_iterator(rdb.store.readOptions)
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defer: rit.rocksdb_iter_destroy()
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rit.rocksdb_iter_seek_to_first()
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while rit.rocksdb_iter_valid() != 0:
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var kLen: csize_t
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let kData = rit.rocksdb_iter_key(addr kLen)
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if not kData.isNil and 0 < kLen:
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var vLen: csize_t
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let vData = rit.rocksdb_iter_value(addr vLen)
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if not vData.isNil and 0 < vLen:
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let
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key = kData.toOpenArrayByte(0,int(kLen)-1).toSeq
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data = vData.toOpenArrayByte(0,int(vLen)-1).toSeq
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yield (key,data)
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# Update Iterator (might overwrite kData/vdata)
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rit.rocksdb_iter_next()
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# End while
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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