ReadBOMEncoding() [2/2]

static SupportedEncoding System.Xml.EncodingStreamWrapper.ReadBOMEncoding ( byte b1, byte b2, byte b3, byte b4, bool notOutOfBand, out int preserve )

inlinestaticprivate

Definition at line 292 of file EncodingStreamWrapper.cs.

    {
        SupportedEncoding result = SupportedEncoding.UTF8;
        preserve = 0;
        if (b1 == 60 && b2 != 0)
        {
            result = SupportedEncoding.UTF8;
            preserve = 4;
        }
        else if (b1 == byte.MaxValue && b2 == 254)
        {
            result = SupportedEncoding.UTF16LE;
            preserve = 2;
        }
        else if (b1 == 254 && b2 == byte.MaxValue)
        {
            result = SupportedEncoding.UTF16BE;
            preserve = 2;
        }
        else if (b1 == 0 && b2 == 60)
        {
            result = SupportedEncoding.UTF16BE;
            if (notOutOfBand && (b3 != 0 || b4 != 63))
            {
                throw new XmlException(System.SR.XmlDeclMissing);
            }
            preserve = 4;
        }
        else if (b1 == 60 && b2 == 0)
        {
            result = SupportedEncoding.UTF16LE;
            if (notOutOfBand && (b3 != 63 || b4 != 0))
            {
                throw new XmlException(System.SR.XmlDeclMissing);
            }
            preserve = 4;
        }
        else if (b1 == 239 && b2 == 187)
        {
            if (notOutOfBand && b3 != 191)
            {
                throw new XmlException(System.SR.XmlBadBOM);
            }
            preserve = 1;
        }
        else
        {
            preserve = 4;
        }
        return result;
    }

References System.Xml.Dictionary, System.SR.XmlBadBOM, System.SR.XmlDeclMissing, and System.Xml.XmlException.