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