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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace Grpc.Core.Internal
{
/// <summary>
/// Useful methods for native/managed marshalling.
/// </summary>
internal static class MarshalUtils
{
static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
static readonly Encoding EncodingASCII = System.Text.Encoding.ASCII;
/// <summary>
/// Converts <c>IntPtr</c> pointing to a UTF-8 encoded byte array to <c>string</c>.
/// </summary>
public static string PtrToStringUTF8(IntPtr ptr, int len)
{
if (len == 0)
{
return "";
}
// TODO(jtattermusch): once Span dependency is added,
// use Span-based API to decode the string without copying the buffer.
var bytes = new byte[len];
Marshal.Copy(ptr, bytes, 0, len);
return EncodingUTF8.GetString(bytes);
}
/// <summary>
/// Returns byte array containing UTF-8 encoding of given string.
/// </summary>
public static byte[] GetBytesUTF8(string str)
{
return EncodingUTF8.GetBytes(str);
}
/// <summary>
/// Get string from a UTF8 encoded byte array.
/// </summary>
public static string GetStringUTF8(byte[] bytes)
{
return EncodingUTF8.GetString(bytes);
}
/// <summary>
/// Returns byte array containing ASCII encoding of given string.
/// </summary>
public static byte[] GetBytesASCII(string str)
{
return EncodingASCII.GetBytes(str);
}
/// <summary>
/// Get string from an ASCII encoded byte array.
/// </summary>
public static string GetStringASCII(byte[] bytes)
{
return EncodingASCII.GetString(bytes);
}
}
}
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