WebHeaderEncoding.cs

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namespace System.Net;
 
internal static class WebHeaderEncoding
{
    internal unsafe static string GetString(byte[] bytes, int byteIndex, int byteCount)
    {
        if (byteCount < 1)
        {
            return string.Empty;
        }
        return string.Create(byteCount, (bytes, byteIndex), delegate(Span<char> buffer, (byte[] bytes, int byteIndex) state)
        {
            fixed (byte* ptr = &state.bytes[state.byteIndex])
            {
                fixed (char* ptr3 = buffer)
                {
                    byte* ptr2 = ptr;
                    char* ptr4 = ptr3;
                    int num;
                    for (num = buffer.Length; num >= 8; num -= 8)
                    {
                        *ptr4 = (char)(*ptr2);
                        ptr4[1] = (char)ptr2[1];
                        ptr4[2] = (char)ptr2[2];
                        ptr4[3] = (char)ptr2[3];
                        ptr4[4] = (char)ptr2[4];
                        ptr4[5] = (char)ptr2[5];
                        ptr4[6] = (char)ptr2[6];
                        ptr4[7] = (char)ptr2[7];
                        ptr4 += 8;
                        ptr2 += 8;
                    }
                    for (int i = 0; i < num; i++)
                    {
                        ptr4[i] = (char)ptr2[i];
                    }
                }
            }
        });
    }
 
    internal static int GetByteCount(string myString)
    {
        return myString.Length;
    }
 
    internal unsafe static void GetBytes(string myString, int charIndex, int charCount, byte[] bytes, int byteIndex)
    {
        if (myString.Length == 0)
        {
            return;
        }
        fixed (byte* ptr = bytes)
        {
            byte* ptr2 = ptr + byteIndex;
            int num = charIndex + charCount;
            while (charIndex < num)
            {
                *(ptr2++) = (byte)myString[charIndex++];
            }
        }
    }
}