System.Xml.XmlStreamNodeWriter.UnsafeGetUTF8Chars C# (CSharp) Méthode

        unsafe protected int UnsafeGetUTF8Chars(char* chars, int charCount, byte[] buffer, int offset)
        {
            if (charCount > 0)
            {
                fixed (byte* _bytes = &buffer[offset])
                {
                    byte* bytes = _bytes;
                    byte* bytesMax = &bytes[buffer.Length - offset];
                    char* charsMax = &chars[charCount];

                    while (true)
                    {
                        while (chars < charsMax)
                        {
                            char t = *chars;
                            if (t >= 0x80)
                                break;

                            *bytes = (byte)t;
                            bytes++;
                            chars++;
                        }

                        if (chars >= charsMax)
                            break;

                        char* charsStart = chars;
                        while (chars < charsMax && *chars >= 0x80)
                        {
                            chars++;
                        }

                        bytes += (_encoding ?? s_UTF8Encoding).GetBytes(charsStart, (int)(chars - charsStart), bytes, (int)(bytesMax - bytes));

                        if (chars >= charsMax)
                            break;
                    }

                    return (int)(bytes - _bytes);
                }
            }
            return 0;
        }