| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System.Diagnostics; |
| | | 5 | | |
| | | 6 | | namespace System.Net.Http |
| | | 7 | | { |
| | | 8 | | internal static partial class Http3Frame |
| | | 9 | | { |
| | | 10 | | public const int MaximumEncodedFrameEnvelopeLength = 1 + VariableLengthIntegerHelper.MaximumEncodedLength; // Fr |
| | | 11 | | |
| | | 12 | | /// <summary> |
| | | 13 | | /// Reads two variable-length integers. |
| | | 14 | | /// </summary> |
| | | 15 | | public static bool TryReadIntegerPair(ReadOnlySpan<byte> buffer, out long a, out long b, out int bytesRead) |
| | 0 | 16 | | { |
| | 0 | 17 | | if (VariableLengthIntegerHelper.TryRead(buffer, out a, out int aLength)) |
| | 0 | 18 | | { |
| | 0 | 19 | | buffer = buffer.Slice(aLength); |
| | 0 | 20 | | if (VariableLengthIntegerHelper.TryRead(buffer, out b, out int bLength)) |
| | 0 | 21 | | { |
| | 0 | 22 | | bytesRead = aLength + bLength; |
| | 0 | 23 | | return true; |
| | | 24 | | } |
| | 0 | 25 | | } |
| | | 26 | | |
| | 0 | 27 | | b = 0; |
| | 0 | 28 | | bytesRead = 0; |
| | 0 | 29 | | return false; |
| | 0 | 30 | | } |
| | | 31 | | |
| | | 32 | | // 0 1 2 3 |
| | | 33 | | // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| | | 34 | | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | 35 | | // | Type (i) ... |
| | | 36 | | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | 37 | | // | Length (i) ... |
| | | 38 | | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | 39 | | // | Frame Payload (*) ... |
| | | 40 | | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | 41 | | public static bool TryWriteFrameEnvelope(Http3FrameType frameType, long payloadLength, Span<byte> buffer, out in |
| | 0 | 42 | | { |
| | 0 | 43 | | Debug.Assert(VariableLengthIntegerHelper.GetByteCount((long)frameType) == 1, $"{nameof(TryWriteFrameEnvelope |
| | | 44 | | |
| | 0 | 45 | | if (buffer.Length != 0) |
| | 0 | 46 | | { |
| | 0 | 47 | | buffer[0] = (byte)frameType; |
| | 0 | 48 | | buffer = buffer.Slice(1); |
| | | 49 | | |
| | 0 | 50 | | if (VariableLengthIntegerHelper.TryWrite(buffer, payloadLength, out int payloadLengthEncodedLength)) |
| | 0 | 51 | | { |
| | 0 | 52 | | bytesWritten = payloadLengthEncodedLength + 1; |
| | 0 | 53 | | return true; |
| | | 54 | | } |
| | 0 | 55 | | } |
| | | 56 | | |
| | 0 | 57 | | bytesWritten = 0; |
| | 0 | 58 | | return false; |
| | 0 | 59 | | } |
| | | 60 | | } |
| | | 61 | | } |