/// <summary> Saves key value index to stream. </summary>
public static void Save(KeyValueIndex index, Stream stream)
{
using (var writer = new BinaryWriter(stream))
{
writer.Write(index._capacity);
writer.Write(index.PrefixLength);
var buckets = index._buckets;
for (int i = 0; i < buckets.Length; i++)
{
writer.Write(buckets[i]);
}
}
}
/// <summary> Creates instance of <see cref="KeyValueStore"/>. </summary>
/// <param name="index">Index.</param>
/// <param name="usage">Usage.</param>
/// <param name="stream">Stream.</param>
public KeyValueStore(KeyValueIndex index, KeyValueUsage usage, Stream stream)
{
_prefixLength = index.PrefixLength;
_stream = stream;
// TODO configure consts
_index = index;
_usage = usage;
// NOTE buffer size limited to byte.MaxValue which affect max string size
_byteBuffer = new byte[256];
_charBuffer = new char[256];
// NOTE skip header
_nextOffset = 2;
stream.Seek(_nextOffset, SeekOrigin.Begin);
}
/// <summary> Loads key value index from stream. </summary>
public static KeyValueIndex Load(Stream stream)
{
using (var reader = new BinaryReader(stream))
{
var capacity = reader.ReadInt32();
var prefixLength = reader.ReadInt32();
var index = new KeyValueIndex(capacity, prefixLength);
var buckets = index._buckets;
for (int i = 0; i < buckets.Length; i++)
{
buckets[i] = reader.ReadUInt32();
}
return(index);
}
}
