private void InPlaceSplit(string inputFile, string outputDir, int splitNum)
{
var splitFileLocation = Path.Combine(outputDir, "00");
File.Move(inputFile, splitFileLocation);
using (Stream input = File.Open(splitFileLocation, FileMode.Open))
{
for (var i = splitNum; i >= 0; i--)
{
StartWritingFile?.Invoke(this, $"{i:D2}");
if (i != 0)
{
using (Stream output = File.Create(Path.Combine(outputDir, $"{i:D2}")))
{
input.Seek(i * SplitSize, SeekOrigin.Begin);
input.CopyTo(output);
input.SetLength(i * SplitSize);
}
}
FinishWritingFile?.Invoke(this, $"{i:D2}");
}
}
}
private void CopySplit(string inputFile, string outputDir, int splitNum)
{
var byteBuffer = new byte[ChunkSize];
using (Stream input = File.OpenRead(inputFile))
{
for (var i = 0; i < splitNum; i++)
{
StartWritingFile?.Invoke(this, $"{i:D2}");
long currentPosition = 0;
using (Stream output = File.Create(Path.Combine(outputDir, $"{i:D2}")))
{
while (currentPosition < SplitSize && input.Position != input.Length)
{
currentPosition += input.Read(byteBuffer, 0, ChunkSize);
output.Write(byteBuffer, 0, ChunkSize);
}
FinishWritingFile?.Invoke(this, $"{i:D2}");
}
}
if (input.Position >= input.Length)
{
return;
}
StartWritingFile?.Invoke(this, $"{splitNum:D2}");
using (Stream output = File.Create(Path.Combine(outputDir, $"{splitNum:D2}")))
{
input.CopyTo(output);
}
FinishWritingFile?.Invoke(this, $"{splitNum:D2}");
}
}