CharacterDevice(IByteDevice backend, Text.Encoding encoding)
{
this.backend = backend;
this.encoding = encoding;
this.peeked = new PeekBuffer(async() =>
{
// TODO: Could we use this.encoder.Encode(Func<byte?>)?
char?result = null;
var next = await this.backend.Read();
if (next.HasValue)
{
var buffer = new byte[this.encoding.GetSymbolLength(next.Value)];
buffer[0] = next.Value;
for (var i = 1; i < buffer.Length && (next = await this.backend.Read()).HasValue; i++)
{
buffer[i] = next.Value;
}
var r = this.encoding.Decode(buffer);
if (r.Length > 0)
{
result = r[0];
}
}
return(result);
});
}
internal ByteDevice(System.IO.Stream backend, Uri.Locator resource, bool dontClose = false) :
base(backend, resource, dontClose)
{
this.peeked = new PeekBuffer(async() =>
{
var buffer = new byte[64 * 1024];
return(await this.backend.ReadAsync(buffer, 0, 1) == 1 ? new Collection.Queue <byte>(buffer) : null);
});
}
internal BlockDevice(System.IO.Stream backend, Uri.Locator resource, bool dontClose = false) :
base(backend, resource, dontClose)
{
this.peeked = new PeekBuffer(async() =>
{
var buffer = new byte[64 * 1024];
int count = await this.backend.ReadAsync(buffer, 0, buffer.Length);
return(count > 0 ? buffer.Slice(0, count) : null);
});
}