public Result ReadDatabaseFromBuffer(ReadOnlySpan <byte> data)
{
KvDict.Clear();
var reader = new ImkvdbReader(data);
Result rc = reader.ReadHeader(out int entryCount);
if (rc.IsFailure())
{
return(rc);
}
for (int i = 0; i < entryCount; i++)
{
rc = reader.ReadEntry(out ReadOnlySpan <byte> keyBytes, out ReadOnlySpan <byte> valueBytes);
if (rc.IsFailure())
{
return(rc);
}
Debug.Assert(keyBytes.Length == Unsafe.SizeOf <TKey>());
var key = new TKey();
keyBytes.CopyTo(SpanHelpers.AsByteSpan(ref key));
byte[] value = valueBytes.ToArray();
KvDict.Add(key, value);
}
return(Result.Success);
}
public Result GetValue(ref TKey key, out byte[] value)
{
if (!KvDict.TryGetValue(key, out value))
{
return(ResultKvdb.KeyNotFound.Log());
}
return(Result.Success);
}
public Result WriteDatabaseToBuffer(Span <byte> output)
{
var writer = new ImkvdbWriter(output);
writer.WriteHeader(KvDict.Count);
foreach (KeyValuePair <TKey, byte[]> entry in KvDict.OrderBy(x => x.Key))
{
TKey key = entry.Key;
writer.WriteEntry(SpanHelpers.AsByteSpan(ref key), entry.Value);
}
return(Result.Success);
}
public Dictionary <TKey, byte[]> .Enumerator GetEnumerator()
{
return(KvDict.GetEnumerator());
}
public Result Delete(ref TKey key)
{
bool deleted = KvDict.Remove(key);
return(deleted ? Result.Success : ResultKvdb.KeyNotFound.Log());
}
public List <(TKey key, byte[] value)> ToList()
{
return(KvDict.OrderBy(x => x.Key).Select(entry => (entry.Key, entry.Value)).ToList());
}