public void Reset(int position)
{
// if position is within already read character range then just use what we have
int relative = position - _basis;
if (relative >= 0 && relative <= _characterWindowCount)
{
_offset = relative;
}
else
{
// we need to reread text buffer
int amountToRead = Math.Min(_text.Length, position + _characterWindow.Length) - position;
amountToRead = Math.Max(amountToRead, 0);
if (amountToRead > 0)
{
_text.CopyTo(position, _characterWindow, 0, amountToRead);
}
_lexemeStart = 0;
_offset = 0;
_basis = position;
_characterWindowCount = amountToRead;
}
}
public override int Read(char[] buffer, int index, int count)
{
count = Math.Min(count, text.Length - position);
text.CopyTo(position, buffer, index, count);
position += count;
return(count);
}
public void WriteText(SourceText text, CancellationToken cancellationToken)
{
if (memoryMappedInfo != null)
{
throw new InvalidOperationException();
}
using (Logger.LogBlock(FeatureId.TemporaryStorage, FunctionId.Host_TemporaryStorageServiceFactory_WriteText, cancellationToken))
{
var size = Encoding.Unicode.GetMaxByteCount(text.Length);
memoryMappedInfo = service.memoryMappedFileManager.CreateViewInfo(size);
var buffer = SharedPools.CharArray.Allocate();
using (var stream = memoryMappedInfo.CreateWritableStream())
{
// PERF: Don't call text.Write(writer) directly since it can cause multiple large string
// allocations from String.Substring. Instead use one of our pooled char[] buffers.
using (var writer = new StreamWriter(stream, Encoding.Unicode))
{
for (int index = 0; index < text.Length; index += buffer.Length)
{
cancellationToken.ThrowIfCancellationRequested();
var count = Math.Min(buffer.Length, text.Length - index);
text.CopyTo(index, buffer, 0, count);
writer.Write(buffer, 0, count);
}
}
}
SharedPools.CharArray.Free(buffer);
}
}
public override int Read(char[] buffer, int index, int count)
{
var charsToCopy = Math.Min(count, _sourceText.Length - _position);
_sourceText.CopyTo(_position, buffer, index, charsToCopy);
_position += charsToCopy;
return(charsToCopy);
}
private string GetString(SourceText sourceText)
{
var sourceChars = new char[sourceText.Length];
sourceText.CopyTo(0, sourceChars, 0, sourceText.Length);
var sourceString = new string(sourceChars);
return(sourceString);
}
public static RootNode GetSyntaxTree(string path, SourceText text)
{
var chars = new char[text.Length];
text.CopyTo(0, chars, 0, text.Length);
var resolvedEncoding = text.Encoding ?? Encoding.UTF8;
var inputFile = resolvedEncoding.GetBytes(chars);
var nodes = new List <Node>();
var lines = text.Lines;
RootNode ast = null;
using (var inputSlab = new MemoryPoolSlab(inputFile))
using (var outputSlab = new MemoryPoolSlab(new byte[1000000]))
{
var parseStatus = generate(inputSlab.NativePointer, inputFile.Length, outputSlab.NativePointer, out var descriptorSize);
var byteArray = new byte[descriptorSize];
Marshal.Copy(outputSlab.NativePointer, byteArray, 0, (int)descriptorSize);
var file = FileDescriptorProto.ParseFrom(byteArray);
foreach (var location in file.SourceCodeInfo.LocationList)
{
nodes.Add(Node.CreateNode(location, text));
}
foreach (var node in nodes.OrderByDescending(i => i.Content.Length))
{
if (ast == null)
{
ast = node as RootNode;
}
else
{
var targetNode = ast.GetNodeAt(node.StartLine, node.StartCol);
targetNode.Children.Add(node);
node.Parent = targetNode;
}
}
}
return(ast);
}
public override void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count)
{
_sourceText.CopyTo(sourceIndex, destination, destinationIndex, count);
}