public void Save(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new InvalidOperationException();
}
var fullPath = Path.GetFullPath(path);
if (!Directory.Exists(Path.GetDirectoryName(fullPath)))
{
throw new InvalidOperationException();
}
var requiredLength = LargePageMemoryChunk.Builder()
.ReserveAligned(FirstChildEdgeIndex)
.ReserveAligned(EdgeToNodeIndex)
.ReserveAligned(EdgeCharacters)
.ReserveAligned(ReachableTerminalNodes)
.ReserveAligned(WordCounts)
.AllocationSize;
using var stream = File.OpenWrite(path);
if (stream == null)
{
throw new InvalidOperationException();
}
stream.WriteCompressed(requiredLength);
stream.WriteCompressed(RootNodeIndex);
stream.WriteSequentialCompressedToUshort(FirstChildEdgeIndex);
stream.WriteCompressed(EdgeToNodeIndex);
stream.WriteUtf8(EdgeCharacters);
stream.WriteCompressed(ReachableTerminalNodes);
stream.WriteCompressed(WordCounts);
}
public CompressedSparseRowPointerGraph(Stream stream)
{
var totalPageSize = stream.ReadCompressedULong();
MemoryChunk = new LargePageMemoryChunk(totalPageSize);
RootNodeIndex = stream.ReadCompressedInt();
var firstChildEdgeIndexCount = stream.ReadCompressedUInt();
FirstChildEdgeIndex = MemoryChunk.GetArrayAligned <uint>(firstChildEdgeIndexCount);
stream.ReadSequentialCompressedUshortToUint(FirstChildEdgeIndex, firstChildEdgeIndexCount);
var edgeToNodeIndexCount = stream.ReadCompressedUInt();
#if DEBUG
for (var i = 0; i < firstChildEdgeIndexCount; i++)
{
Debug.Assert(FirstChildEdgeIndex[i] <= edgeToNodeIndexCount, $"{nameof(FirstChildEdgeIndex)} should not point past {edgeToNodeIndexCount}, but it's value at index {i} was {FirstChildEdgeIndex[i]}");
}
#endif
EdgeToNodeIndex = MemoryChunk.GetArrayAligned <int>(edgeToNodeIndexCount);
stream.ReadCompressed(EdgeToNodeIndex, edgeToNodeIndexCount);
#if DEBUG
for (var i = 0; i < edgeToNodeIndexCount; i++)
{
Debug.Assert(Math.Abs(EdgeToNodeIndex[i]) <= firstChildEdgeIndexCount, $"{nameof(EdgeToNodeIndex)} should not point past {firstChildEdgeIndexCount}, but it's value at index {i} was {EdgeToNodeIndex[i]}");
}
#endif
var byteLength = stream.ReadCompressedUInt();
var charLength = stream.ReadCompressedUInt();
EdgeCharacter = MemoryChunk.GetArrayAligned <char>(charLength);
stream.ReadUtf8(EdgeCharacter, byteLength, charLength);
var reachableTerminalNodesCount = stream.ReadCompressedUInt();
ReachableTerminalNodes = MemoryChunk.GetArrayAligned <ushort>(reachableTerminalNodesCount);
stream.ReadCompressed(ReachableTerminalNodes, reachableTerminalNodesCount);
WordCount = stream.ReadCompressedUInt();
WordCounts = MemoryChunk.GetArrayAligned <ulong>(WordCount);
stream.ReadCompressed(WordCounts, WordCount);
MemoryChunk.Lock();
}