371 lines
14 KiB
C#
371 lines
14 KiB
C#
#region Copyright notice and license
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#endregion
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using System;
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using System.Buffers;
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using System.Buffers.Binary;
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using System.Collections.Generic;
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using System.IO;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Security;
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using System.Text;
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using LC.Google.Protobuf.Collections;
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namespace LC.Google.Protobuf
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{
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/// <summary>
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/// An opaque struct that represents the current serialization state and is passed along
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/// as the serialization proceeds.
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/// All the public methods are intended to be invoked only by the generated code,
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/// users should never invoke them directly.
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/// </summary>
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[SecuritySafeCritical]
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public ref struct WriteContext
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{
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internal Span<byte> buffer;
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internal WriterInternalState state;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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internal static void Initialize(ref Span<byte> buffer, ref WriterInternalState state, out WriteContext ctx)
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{
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ctx.buffer = buffer;
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ctx.state = state;
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}
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/// <summary>
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/// Creates a WriteContext instance from CodedOutputStream.
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/// WARNING: internally this copies the CodedOutputStream's state, so after done with the WriteContext,
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/// the CodedOutputStream's state needs to be updated.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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internal static void Initialize(CodedOutputStream output, out WriteContext ctx)
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{
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ctx.buffer = new Span<byte>(output.InternalBuffer);
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// ideally we would use a reference to the original state, but that doesn't seem possible
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// so we just copy the struct that holds the state. We will need to later store the state back
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// into CodedOutputStream if we want to keep it usable.
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ctx.state = output.InternalState;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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internal static void Initialize(IBufferWriter<byte> output, out WriteContext ctx)
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{
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ctx.buffer = default;
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ctx.state = default;
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WriteBufferHelper.Initialize(output, out ctx.state.writeBufferHelper, out ctx.buffer);
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ctx.state.limit = ctx.buffer.Length;
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ctx.state.position = 0;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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internal static void Initialize(ref Span<byte> buffer, out WriteContext ctx)
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{
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ctx.buffer = buffer;
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ctx.state = default;
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ctx.state.limit = ctx.buffer.Length;
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ctx.state.position = 0;
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WriteBufferHelper.InitializeNonRefreshable(out ctx.state.writeBufferHelper);
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}
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/// <summary>
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/// Writes a double field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteDouble(double value)
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{
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WritingPrimitives.WriteDouble(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a float field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteFloat(float value)
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{
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WritingPrimitives.WriteFloat(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a uint64 field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteUInt64(ulong value)
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{
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WritingPrimitives.WriteUInt64(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an int64 field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteInt64(long value)
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{
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WritingPrimitives.WriteInt64(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an int32 field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteInt32(int value)
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{
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WritingPrimitives.WriteInt32(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a fixed64 field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteFixed64(ulong value)
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{
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WritingPrimitives.WriteFixed64(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a fixed32 field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteFixed32(uint value)
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{
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WritingPrimitives.WriteFixed32(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a bool field value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteBool(bool value)
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{
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WritingPrimitives.WriteBool(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a string field value, without a tag.
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/// The data is length-prefixed.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteString(string value)
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{
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WritingPrimitives.WriteString(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a message, without a tag.
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/// The data is length-prefixed.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteMessage(IMessage value)
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{
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WritingPrimitivesMessages.WriteMessage(ref this, value);
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}
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/// <summary>
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/// Writes a group, without a tag, to the stream.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteGroup(IMessage value)
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{
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WritingPrimitivesMessages.WriteGroup(ref this, value);
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}
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/// <summary>
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/// Write a byte string, without a tag, to the stream.
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/// The data is length-prefixed.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteBytes(ByteString value)
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{
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WritingPrimitives.WriteBytes(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a uint32 value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteUInt32(uint value)
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{
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WritingPrimitives.WriteUInt32(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an enum value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteEnum(int value)
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{
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WritingPrimitives.WriteEnum(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an sfixed32 value, without a tag.
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/// </summary>
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/// <param name="value">The value to write.</param>
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public void WriteSFixed32(int value)
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{
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WritingPrimitives.WriteSFixed32(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an sfixed64 value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteSFixed64(long value)
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{
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WritingPrimitives.WriteSFixed64(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an sint32 value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteSInt32(int value)
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{
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WritingPrimitives.WriteSInt32(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes an sint64 value, without a tag.
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/// </summary>
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/// <param name="value">The value to write</param>
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public void WriteSInt64(long value)
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{
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WritingPrimitives.WriteSInt64(ref buffer, ref state, value);
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}
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/// <summary>
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/// Writes a length (in bytes) for length-delimited data.
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/// </summary>
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/// <remarks>
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/// This method simply writes a rawint, but exists for clarity in calling code.
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/// </remarks>
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/// <param name="length">Length value, in bytes.</param>
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public void WriteLength(int length)
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{
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WritingPrimitives.WriteLength(ref buffer, ref state, length);
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}
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/// <summary>
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/// Encodes and writes a tag.
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/// </summary>
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/// <param name="fieldNumber">The number of the field to write the tag for</param>
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/// <param name="type">The wire format type of the tag to write</param>
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public void WriteTag(int fieldNumber, WireFormat.WireType type)
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{
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WritingPrimitives.WriteTag(ref buffer, ref state, fieldNumber, type);
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}
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/// <summary>
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/// Writes an already-encoded tag.
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/// </summary>
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/// <param name="tag">The encoded tag</param>
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public void WriteTag(uint tag)
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{
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WritingPrimitives.WriteTag(ref buffer, ref state, tag);
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}
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/// <summary>
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/// Writes the given single-byte tag.
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/// </summary>
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/// <param name="b1">The encoded tag</param>
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public void WriteRawTag(byte b1)
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{
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WritingPrimitives.WriteRawTag(ref buffer, ref state, b1);
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}
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/// <summary>
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/// Writes the given two-byte tag.
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/// </summary>
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/// <param name="b1">The first byte of the encoded tag</param>
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/// <param name="b2">The second byte of the encoded tag</param>
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public void WriteRawTag(byte b1, byte b2)
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{
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WritingPrimitives.WriteRawTag(ref buffer, ref state, b1, b2);
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}
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/// <summary>
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/// Writes the given three-byte tag.
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/// </summary>
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/// <param name="b1">The first byte of the encoded tag</param>
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/// <param name="b2">The second byte of the encoded tag</param>
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/// <param name="b3">The third byte of the encoded tag</param>
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public void WriteRawTag(byte b1, byte b2, byte b3)
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{
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WritingPrimitives.WriteRawTag(ref buffer, ref state, b1, b2, b3);
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}
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/// <summary>
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/// Writes the given four-byte tag.
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/// </summary>
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/// <param name="b1">The first byte of the encoded tag</param>
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/// <param name="b2">The second byte of the encoded tag</param>
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/// <param name="b3">The third byte of the encoded tag</param>
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/// <param name="b4">The fourth byte of the encoded tag</param>
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public void WriteRawTag(byte b1, byte b2, byte b3, byte b4)
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{
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WritingPrimitives.WriteRawTag(ref buffer, ref state, b1, b2, b3, b4);
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}
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/// <summary>
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/// Writes the given five-byte tag.
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/// </summary>
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/// <param name="b1">The first byte of the encoded tag</param>
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/// <param name="b2">The second byte of the encoded tag</param>
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/// <param name="b3">The third byte of the encoded tag</param>
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/// <param name="b4">The fourth byte of the encoded tag</param>
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/// <param name="b5">The fifth byte of the encoded tag</param>
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public void WriteRawTag(byte b1, byte b2, byte b3, byte b4, byte b5)
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{
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WritingPrimitives.WriteRawTag(ref buffer, ref state, b1, b2, b3, b4, b5);
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}
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internal void Flush()
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{
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WriteBufferHelper.Flush(ref buffer, ref state);
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}
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internal void CheckNoSpaceLeft()
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{
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WriteBufferHelper.CheckNoSpaceLeft(ref state);
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}
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internal void CopyStateTo(CodedOutputStream output)
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{
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output.InternalState = state;
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}
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internal void LoadStateFrom(CodedOutputStream output)
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{
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state = output.InternalState;
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}
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}
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} |