private int ReadInternalSync(byte[] buffer, int offset, int count)
{
int i;
int num;
for (i = 0; i < count; i += num)
{
if (currentCommandStream.Position == currentCommandStream.Length)
{
currentCommandStream = new MemoryStream();
BinaryWriter binaryWriter = new BinaryWriter(currentCommandStream);
while (currentCommandStream.Length < count - i && commandsToOutput.MoveNext())
{
DeltaCalculator.WriteCommand(binaryWriter, commandsToOutput.Current);
}
binaryWriter.Flush();
currentCommandStream.Seek(0L, SeekOrigin.Begin);
}
num = currentCommandStream.Read(buffer, offset + i, count - i);
if (num <= 0)
{
break;
}
}
return(i);
}
public DeltaStream(Stream signatureStream, Stream inputStream)
{
SignatureFile signatures = SignatureHelpers.ParseSignatureFile(signatureStream);
IEnumerable <OutputCommand> enumerable = DeltaCalculator.ComputeCommands(new BinaryReader(inputStream), signatures);
commandsToOutput = enumerable.GetEnumerator();
currentCommandStream = new MemoryStream();
BinaryWriter binaryWriter = new BinaryWriter(currentCommandStream);
StreamHelpers.WriteBigEndian(binaryWriter, 1920139830uL);
binaryWriter.Flush();
currentCommandStream.Seek(0L, SeekOrigin.Begin);
}
public DeltaStream(Stream signatureStream, Stream inputStream)
{
var signature = SignatureHelpers.ParseSignatureFile(signatureStream);
var inputReader = new BinaryReader(inputStream);
var commands = DeltaCalculator.ComputeCommands(inputReader, signature);
this.commandsToOutput = commands.GetEnumerator();
this.currentCommandStream = new MemoryStream();
var writer = new BinaryWriter(this.currentCommandStream);
StreamHelpers.WriteBigEndian(writer, (uint)MagicNumber.Delta);
writer.Flush();
this.currentCommandStream.Seek(0, SeekOrigin.Begin);
}
public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (currentCommandStream.Position == currentCommandStream.Length)
{
if (!commandsToOutput.MoveNext())
{
return(0);
}
this.currentCommandStream = new MemoryStream();
var writer = new BinaryWriter(this.currentCommandStream);
DeltaCalculator.WriteCommand(writer, commandsToOutput.Current);
writer.Flush();
this.currentCommandStream.Seek(0, SeekOrigin.Begin);
}
return(await this.currentCommandStream.ReadAsync(buffer, offset, count));
}
