GetBytesWithFallback() [2/2]

unsafe override int System.Text.ASCIIEncoding.GetBytesWithFallback ( ReadOnlySpan< char > chars, int originalCharsLength, Span< byte > bytes, int originalBytesLength, EncoderNLS encoder )

inlinesealedprotectedvirtualinherited

Reimplemented from System.Text.Encoding.

Definition at line 215 of file ASCIIEncoding.cs.

    {
        if (((encoder == null) ? base.EncoderFallback : encoder.Fallback) is EncoderReplacementFallback { MaxCharCount: 1 } encoderReplacementFallback && encoderReplacementFallback.DefaultString[0] <= '\u007f')
        {
            byte b = (byte)encoderReplacementFallback.DefaultString[0];
            int num = Math.Min(chars.Length, bytes.Length);
            int num2 = 0;
            fixed (char* ptr2 = &MemoryMarshal.GetReference(chars))
            {
                fixed (byte* ptr = &MemoryMarshal.GetReference(bytes))
                {
                    while (num2 < num)
                    {
                        ptr[num2++] = b;
                        if (num2 < num)
                        {
                            num2 += (int)ASCIIUtility.NarrowUtf16ToAscii(ptr2 + num2, ptr + num2, (uint)(num - num2));
                        }
                    }
                }
            }
            chars = chars.Slice(num);
            bytes = bytes.Slice(num);
        }
        if (chars.IsEmpty)
        {
            return originalBytesLength - bytes.Length;
        }
        return base.GetBytesWithFallback(chars, originalCharsLength, bytes, originalBytesLength, encoder);
    }

References System.bytes, System.chars, System.Text.EncoderReplacementFallback.DefaultString, System.Text.EncoderNLS.Fallback, System.Math.Min(), and System.Text.ASCIIUtility.NarrowUtf16ToAscii().

Referenced by System.Text.ASCIIEncoding.GetBytesCommon().