public void WriteTo(ref WriteContext ctx)
{
foreach (KeyValuePair <int, UnknownField> entry in fields)
{
entry.Value.WriteTo(entry.Key, ref ctx);
}
}
internal static void Initialize(ref Span <byte> buffer, out WriteContext ctx)
{
ctx.buffer = buffer;
ctx.state = default;
ctx.state.limit = ctx.buffer.Length;
ctx.state.position = 0;
WriteBufferHelper.InitializeNonRefreshable(out ctx.state.writeBufferHelper);
}
internal static void Initialize(IBufferWriter <byte> output, out WriteContext ctx)
{
ctx.buffer = default;
ctx.state = default;
WriteBufferHelper.Initialize(output, out ctx.state.writeBufferHelper, out ctx.buffer);
ctx.state.limit = ctx.buffer.Length;
ctx.state.position = 0;
}
internal static void Initialize(CodedOutputStream output, out WriteContext ctx)
{
ctx.buffer = new Span <byte>(output.InternalBuffer);
// ideally we would use a reference to the original state, but that doesn't seem possible
// so we just copy the struct that holds the state. We will need to later store the state back
// into CodedOutputStream if we want to keep it usable.
ctx.state = output.InternalState;
}
public static void WriteTo(this IMessage message, IBufferWriter <byte> output)
{
ProtoPreconditions.CheckNotNull(message, nameof(message));
ProtoPreconditions.CheckNotNull(output, nameof(output));
WriteContext.Initialize(output, out WriteContext ctx);
WritingPrimitivesMessages.WriteRawMessage(ref ctx, message);
ctx.Flush();
}
public void WriteTo(ref WriteContext ctx)
{
ctx.WriteTag(codec.Tag);
codec.ValueWriter(ref ctx, field);
if (codec.EndTag != 0)
{
ctx.WriteTag(codec.EndTag);
}
}
/// <summary>
/// Serializes the set and writes it to <paramref name="output"/>.
/// </summary>
public void WriteTo(CodedOutputStream output)
{
WriteContext.Initialize(output, out WriteContext ctx);
try
{
WriteTo(ref ctx);
}
finally
{
ctx.CopyStateTo(output);
}
}
/// <summary>
/// Serializes the field, including the field number, and writes it to
/// <paramref name="output"/>
/// </summary>
/// <param name="fieldNumber">The unknown field number.</param>
/// <param name="output">The write context to write to.</param>
internal void WriteTo(int fieldNumber, ref WriteContext output)
{
if (varintList != null)
{
foreach (ulong value in varintList)
{
output.WriteTag(fieldNumber, WireFormat.WireType.Varint);
output.WriteUInt64(value);
}
}
if (fixed32List != null)
{
foreach (uint value in fixed32List)
{
output.WriteTag(fieldNumber, WireFormat.WireType.Fixed32);
output.WriteFixed32(value);
}
}
if (fixed64List != null)
{
foreach (ulong value in fixed64List)
{
output.WriteTag(fieldNumber, WireFormat.WireType.Fixed64);
output.WriteFixed64(value);
}
}
if (lengthDelimitedList != null)
{
foreach (ByteString value in lengthDelimitedList)
{
output.WriteTag(fieldNumber, WireFormat.WireType.LengthDelimited);
output.WriteBytes(value);
}
}
if (groupList != null)
{
foreach (UnknownFieldSet value in groupList)
{
output.WriteTag(fieldNumber, WireFormat.WireType.StartGroup);
value.WriteTo(ref output);
output.WriteTag(fieldNumber, WireFormat.WireType.EndGroup);
}
}
}
public static void WriteRawMessage(ref WriteContext ctx, IMessage message)
{
if (message is IBufferMessage bufferMessage)
{
bufferMessage.InternalWriteTo(ref ctx);
}
else
{
// If we reached here, it means we've ran into a nested message with older generated code
// which doesn't provide the InternalWriteTo method that takes a WriteContext.
// With a slight performance overhead, we can still serialize this message just fine,
// but we need to find the original CodedOutputStream instance that initiated this
// serialization process and make sure its internal state is up to date.
// Note that this performance overhead is not very high (basically copying contents of a struct)
// and it will only be incurred in case the application mixes older and newer generated code.
// Regenerating the code from .proto files will remove this overhead because it will
// generate the InternalWriteTo method we need.
if (ctx.state.CodedOutputStream == null)
{
// This can only happen when the serialization started without providing a CodedOutputStream instance
// (e.g. WriteContext was created directly from a IBufferWriter).
// That also means that one of the new parsing APIs was used at the top level
// and in such case it is reasonable to require that all the nested message provide
// up-to-date generated code with WriteContext support (and fail otherwise).
throw new InvalidProtocolBufferException($"Message {message.GetType().Name} doesn't provide the generated method that enables WriteContext-based serialization. You might need to regenerate the generated protobuf code.");
}
ctx.CopyStateTo(ctx.state.CodedOutputStream);
try
{
// fallback parse using the CodedOutputStream that started current serialization tree
message.WriteTo(ctx.state.CodedOutputStream);
}
finally
{
ctx.LoadStateFrom(ctx.state.CodedOutputStream);
}
}
}
public static void WriteGroup(ref WriteContext ctx, IMessage value)
{
WriteRawMessage(ref ctx, value);
}
public static void WriteMessage(ref WriteContext ctx, IMessage value)
{
WritingPrimitives.WriteLength(ref ctx.buffer, ref ctx.state, value.CalculateSize());
WriteRawMessage(ref ctx, value);
}
public void WriteTo(ref WriteContext ctx)
{
field.WriteTo(ref ctx, codec);
}
internal static void Initialize(ref Span <byte> buffer, ref WriterInternalState state, out WriteContext ctx)
{
ctx.buffer = buffer;
ctx.state = state;
}
internal static void Write <T>(ref WriteContext ctx, T value, FieldCodec <T> codec)
{
ctx.WriteLength(codec.CalculateSizeWithTag(value));
codec.WriteTagAndValue(ref ctx, value);
}
