+++ /dev/null
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System.Buffers;
-using System.Diagnostics;
-using System.Reflection;
-using System.Runtime.CompilerServices;
-
-namespace System.Text.Encodings.Web
-{
- /// <summary>
- /// Provides access to <see cref="TextEncoder"/> APIs that aren't part of the ref asms.
- /// </summary>
- internal static class TextEncoderExtensions
- {
- private delegate OperationStatus EncodeUtf8Del(TextEncoder encoder, ReadOnlySpan<byte> utf8Source, Span<byte> utf8Destination, out int bytesConsumed, out int bytesWritten, bool isFinalBlock);
- private delegate int FindFirstCharacterToEncodeUtf8Del(TextEncoder encoder, ReadOnlySpan<byte> utf8Text);
-
- private static readonly EncodeUtf8Del s_encodeUtf8Fn = CreateEncodeUtf8Fn();
- private static readonly FindFirstCharacterToEncodeUtf8Del s_findFirstCharToEncodeUtf8Fn = CreateFindFirstCharToEncodeUtf8Fn();
-
- private static EncodeUtf8Del CreateEncodeUtf8Fn()
- {
- // Locate the shim method, which is able to perform fast virtual dispatch,
- // then create a delegate to it.
-
- MethodInfo methodInfo = typeof(TextEncoder).GetMethod("EncodeUtf8Shim", BindingFlags.NonPublic | BindingFlags.Static);
- Debug.Assert(methodInfo != null);
- EncodeUtf8Del del = (EncodeUtf8Del)methodInfo.CreateDelegate(typeof(EncodeUtf8Del));
-
- // Now invoke the delegate once. The reason for this is that the delegate probably
- // points to the pre-jit stub rather than the final codegen for the method, which
- // means that invocations of this delegate will incur an unnecessary call back into
- // the VM. Invoking the delegate forces JIT to take place now, so a future delegate
- // will point directly to the codegen rather than the pre-jit stub.
-
- del(HtmlEncoder.Default, ReadOnlySpan<byte>.Empty, Span<byte>.Empty, out _, out _, false);
-
- // Now create the delegate again and return it to the caller.
- // The delegate should now be pointing directly to the static method's codegen.
-
- return (EncodeUtf8Del)methodInfo.CreateDelegate(typeof(EncodeUtf8Del));
- }
-
- private static FindFirstCharacterToEncodeUtf8Del CreateFindFirstCharToEncodeUtf8Fn()
- {
- // See the comments in CreateEncodeUtf8Fn for an overview of how this logic works.
-
- MethodInfo methodInfo = typeof(TextEncoder).GetMethod("FindFirstCharacterToEncodeUtf8Shim", BindingFlags.NonPublic | BindingFlags.Static);
- Debug.Assert(methodInfo != null);
-
- FindFirstCharacterToEncodeUtf8Del del = (FindFirstCharacterToEncodeUtf8Del)methodInfo.CreateDelegate(typeof(FindFirstCharacterToEncodeUtf8Del));
- del(HtmlEncoder.Default, ReadOnlySpan<byte>.Empty);
-
- return (FindFirstCharacterToEncodeUtf8Del)methodInfo.CreateDelegate(typeof(FindFirstCharacterToEncodeUtf8Del));
- }
-
- [MethodImpl(MethodImplOptions.AggressiveInlining)]
- internal static OperationStatus EncodeUtf8(this TextEncoder encoder, ReadOnlySpan<byte> utf8Source, Span<byte> utf8Destination, out int bytesConsumed, out int bytesWritten, bool isFinalBlock = true)
- {
- return s_encodeUtf8Fn(encoder, utf8Source, utf8Destination, out bytesConsumed, out bytesWritten, isFinalBlock);
- }
-
- [MethodImpl(MethodImplOptions.AggressiveInlining)]
- internal static int FindFirstCharacterToEncodeUtf8(this TextEncoder encoder, ReadOnlySpan<byte> utf8Text)
- {
- return s_findFirstCharToEncodeUtf8Fn(encoder, utf8Text);
- }
- }
-}
}
/// <summary>
- /// Shim function which can call virtual method <see cref="EncodeUtf8"/> using fast dispatch.
- /// </summary>
- internal static OperationStatus EncodeUtf8Shim(TextEncoder encoder, ReadOnlySpan<byte> utf8Source, Span<byte> utf8Destination, out int bytesConsumed, out int bytesWritten, bool isFinalBlock)
- {
- return encoder.EncodeUtf8(utf8Source, utf8Destination, out bytesConsumed, out bytesWritten, isFinalBlock);
- }
-
- /// <summary>
/// Encodes the supplied characters.
/// </summary>
/// <param name="source">A source buffer containing the characters to encode.</param>
}
}
- /// <summary>
- /// Shim function which can call virtual method <see cref="FindFirstCharacterToEncodeUtf8"/> using fast dispatch.
- /// </summary>
- internal static int FindFirstCharacterToEncodeUtf8Shim(TextEncoder encoder, ReadOnlySpan<byte> utf8Text)
- {
- return encoder.FindFirstCharacterToEncodeUtf8(utf8Text);
- }
-
internal static unsafe bool TryCopyCharacters(char[] source, char* destination, int destinationLength, out int numberOfCharactersWritten)
{
Debug.Assert(source != null && destination != null && destinationLength >= 0);
projects / platform / upstream / dotnet / runtime.git / commitdiff