.Net Core中的Big-Endian处理

问题描述

是否存在 BitConverter 或其他支持.Net Core的类，我可以读取具有Big Endian编码的整数和其他值？

Is there a BitConverter or other class that supports .Net Core that I can read integers and other values as having Big Endian encoding?

我不太需要编写一组辅助方法：

I don't feel good about needing to write a set of helper methods:

int GetBigEndianIntegerFromByteArray(byte[] data, int startIndex) {
    return (data[startIndex] << 24)
         | (data[startIndex + 1] << 16)
         | (data[startIndex + 2] << 8)
         | data[startIndex + 3];
}

推荐答案

.NET Core 2.1开始是静态类 System.Buffers.Binary.BinaryPrimitives

Since .NET Core 2.1 there is a unified API for this in static class System.Buffers.Binary.BinaryPrimitives

的统一API，它包含ReadOnlySpan的API和原始类型的直接逆字节序（short / ushort，int / uint，long / ulong）

It contains API for ReadOnlySpan and direct inverse endianness for primitive types (short/ushort,int/uint,long/ulong)

private void GetBigEndianIntegerFromByteArray(ReadOnlySpan<byte> span,int offset)
{
    return BinaryPrimitives.ReadInt32BigEndian(span.Slice(offset));
}

System.Buffers.Binary.BinaryPrimitives类是.NET Core 2.1的一部分并且不需要NuGet程序包

System.Buffers.Binary.BinaryPrimitives class is a part of .NET Core 2.1 and no NuGet packages are needed

该类还包含Try ...方法

Also this class contains Try... methods

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