protected void FillPreviousData()
{
Debug.Assert(dataPosition > 0);
Debug.Assert(dataIndex == -1);
CancellationToken.ThrowIfCancellationRequested();
dataLength = (int)HexPosition.Min(dataPosition, Data.Length).ToUInt64();
dataPosition -= dataLength;
dataIndex = dataLength - 1;
Buffer.ReadBytes(dataPosition, Data, 0, dataLength);
}
protected void UpdateValue() {
if (disable_UpdateValue)
return;
if (DataFieldVM.HasError)
return;
var newData = GetDataAsByteArray();
Debug2.Assert(!(newData is null) && newData.LongLength == Span.Length);
var origData = buffer.ReadBytes(Span.Start, newData.LongLength);
if (Equals(newData, origData))
return;
buffer.Replace(Span.Start, newData);
OnUpdateValue();
}
public void Execute(IProgress progress)
{
progress.SetDescription(filename);
var file = File.Create(filename);
try {
var buf = new byte[BUF_SIZE];
var pos = span.Start;
long currentProgress = 0;
while (pos < span.End)
{
progress.ThrowIfCancellationRequested();
progress.SetTotalProgress(currentProgress);
currentProgress++;
ulong left = (span.End - pos).ToUInt64();
if (left == 0)
{
left = ulong.MaxValue;
}
int size = left > (ulong)buf.Length ? buf.Length : (int)left;
buffer.ReadBytes(pos, buf, 0, size);
file.Write(buf, 0, size);
pos += (ulong)size;
}
progress.SetTotalProgress(currentProgress);
}
catch {
file.Dispose();
try { File.Delete(filename); }
catch { }
throw;
}
finally {
file.Dispose();
}
}