async Tasks.Task <byte?> IByteInDevice.Read()
{
byte?result = null;
Tasks.Task done;
lock (this.peekedLock)
{
done = this.peeked = this.Peek().Then(p =>
{
Collection.IBlock <byte> r = null;
if (p.NotNull() && p.Count > 0)
{
result = p[0];
r = p.Count > 1 ? p.Slice(1) : null;
}
else
{
result = null;
}
return(r);
});
}
await done;
return(result);
}
public async Tasks.Task <bool> Write(Collection.IBlock <byte> buffer)
{
bool result = true;
try
{
int seek = this.peeked.Reset();
if (seek != 0)
{
await this.Seek(seek);
}
byte[] array = buffer.AsArray();
await this.backend.WriteAsync(array, 0, array.Length);
if (this.AutoFlush)
{
await this.Flush();
}
}
catch (System.Exception)
{
result = false;
}
return(result);
}
public async Tasks.Task <bool> Write(Collection.IBlock <byte> buffer)
{
await this.Flush();
bool result = true;
try
{
byte[] array = buffer.ToArray(); // TODO: fix this with some kind of array-slice api
await this.stream.WriteAsync(array, 0, array.Length);
if (this.AutoFlush)
{
await this.Flush();
}
}
catch (System.Exception)
{
result = false;
}
return(result);
}
