MemoryMarshalExtensions.cs

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using System;
using System.Runtime.InteropServices;
 
namespace IKVM.Runtime.Extensions
{
 
    class MemoryMarshalExtensions
    {
 
        public static unsafe int GetIndexOfNull(byte* ptr, int max = int.MaxValue)
        {
            if (ptr is null)
                throw new ArgumentNullException(nameof(ptr));
            if (max < 0)
                throw new ArgumentOutOfRangeException(nameof(max));
 
            for (int i = 0; i < max; i++)
                if (ptr[i] == 0)
                    return i;
 
            return -1;
        }
 
        public static unsafe ReadOnlySpan<byte> CreateReadOnlySpanFromNullTerminated(byte* b)
        {
#if NETFRAMEWORK
            return new ReadOnlySpan<byte>(b, GetIndexOfNull(b));
#else
            return MemoryMarshal.CreateReadOnlySpanFromNullTerminated(b);
#endif
        }
 
    }
 
}