public async ValueTask <SignatureCollection <TRollingHashAlgorithm, TStrongHashAlgorithm> > ReadSignatures
<TRollingHashAlgorithm, TStrongHashAlgorithm>
(SignatureOptions options,
CancellationToken ct)
where TRollingHashAlgorithm : struct, IRollingHashAlgorithm
where TStrongHashAlgorithm : IStrongHashAlgorithm
{
var signatures = new SignatureCollection <TRollingHashAlgorithm, TStrongHashAlgorithm>();
const int maxSignatures = 1 << 22;
for (int i = 0; i < maxSignatures; i++)
{
var sig = await _reader.Read
<BlockSignature <TRollingHashAlgorithm, TStrongHashAlgorithm>, SignatureOptions>
(options, ct).ConfigureAwait(false);
if (!sig.HasValue)
{
_reader.Complete();
return(signatures);
}
long start = options.BlockLength * i;
#if !NETSTANDARD2_0
signatures.TryAdd(sig.Value, (ulong)start);
#else
if (!signatures.ContainsKey(sig.Value))
{
signatures.Add(sig.Value, (ulong)start);
}
#endif
}
throw new FormatException($"too many signatures");
}
