AnsiCharMarshaler.cs

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using System.Runtime.InteropServices;
using System.Text;
 
namespace System.StubHelpers;
 
internal static class AnsiCharMarshaler
{
    internal unsafe static byte[] DoAnsiConversion(string str, bool fBestFit, bool fThrowOnUnmappableChar, out int cbLength)
    {
        byte[] array = new byte[checked((str.Length + 1) * Marshal.SystemMaxDBCSCharSize)];
        fixed (byte* buffer = &array[0])
        {
            cbLength = Marshal.StringToAnsiString(str, buffer, array.Length, fBestFit, fThrowOnUnmappableChar);
        }
        return array;
    }
 
    internal unsafe static byte ConvertToNative(char managedChar, bool fBestFit, bool fThrowOnUnmappableChar)
    {
        int num = 2 * Marshal.SystemMaxDBCSCharSize;
        byte* ptr = stackalloc byte[(int)(uint)num];
        int num2 = Marshal.StringToAnsiString(managedChar.ToString(), ptr, num, fBestFit, fThrowOnUnmappableChar);
        return *ptr;
    }
 
    internal static char ConvertToManaged(byte nativeChar)
    {
        ReadOnlySpan<byte> bytes = new ReadOnlySpan<byte>(ref nativeChar, 1);
        string @string = Encoding.Default.GetString(bytes);
        return @string[0];
    }
}