public IEnumerator <KeyValuePair <TKey, TValue> > GetEnumerator() { long prevProtectionCounter = 0; var prevModificationCounter = 0; long pos = 0; while (true) { _keyValueTrProtector.Start(); if (pos == 0) { prevModificationCounter = _modificationCounter; _keyValueTr.SetKeyPrefix(_prefix); if (!_keyValueTr.FindFirstKey()) { break; } } else { if (_keyValueTrProtector.WasInterupted(prevProtectionCounter)) { if (prevModificationCounter != _modificationCounter) { ThrowModifiedDuringEnum(); } _keyValueTr.SetKeyPrefix(_prefix); if (!_keyValueTr.SetKeyIndex(pos)) { break; } } else { if (!_keyValueTr.FindNextKey()) { break; } } } prevProtectionCounter = _keyValueTrProtector.ProtectionCounter; var keyBytes = _keyValueTr.GetKeyAsByteArray(); var valueBytes = _keyValueTr.GetValueAsByteArray(); var key = ByteArrayToKey(keyBytes); var value = ByteArrayToValue(valueBytes); yield return(new KeyValuePair <TKey, TValue>(key, value)); pos++; } }
public bool NextKey(out TKey key) { if (_seekState == SeekState.Ready) { _pos++; } if (_pos >= _count) { key = default(TKey); return(false); } _keyValueTrProtector.Start(); if (_keyValueTrProtector.WasInterupted(_prevProtectionCounter)) { _keyValueTr.SetKeyPrefix(_keyBytes); Seek(); } else if (_seekState != SeekState.Ready) { Seek(); } else { if (_ascending) { _keyValueTr.FindNextKey(); } else { _keyValueTr.FindPreviousKey(); } } _prevProtectionCounter = _keyValueTrProtector.ProtectionCounter; //read key var keyData = _keyValueTr.GetKeyAsByteArray(); var reader = new ByteArrayReader(keyData); key = _keyReader(reader, null); return(true); }
public bool NextKey(out TKey key) { if (_seekState == SeekState.Ready) { _pos++; } if (_pos >= _count) { key = default(TKey); return(false); } _keyValueTrProtector.Start(); if (_keyValueTrProtector.WasInterupted(_prevProtectionCounter)) { if (_prevModificationCounter != _owner._modificationCounter) { ThrowModifiedDuringEnum(); } _keyValueTr.SetKeyPrefix(_owner._prefix); Seek(); } else if (_seekState != SeekState.Ready) { Seek(); } else { if (_ascending) { _keyValueTr.FindNextKey(); } else { _keyValueTr.FindPreviousKey(); } } _prevProtectionCounter = _keyValueTrProtector.ProtectionCounter; key = _owner.ByteArrayToKey(_keyValueTr.GetKeyAsByteArray()); return(true); }