mono/mcs/class/referencesource/System.Runtime.Serialization/System/Xml/XmlBinaryWriter.cs

//------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//------------------------------------------------------------


// Uncomment to turn on logging of non-dictionary strings written to binary writers.
// This can help identify element/attribute name/ns that could be written as XmlDictionaryStrings to get better compactness and performance.
// #define LOG_NON_DICTIONARY_WRITES

namespace System.Xml
{
    using System.IO;
    using System.Runtime;
    using System.Runtime.Serialization;
    using System.Security;
    using System.Text;

    public interface IXmlBinaryWriterInitializer
    {
        void SetOutput(Stream stream, IXmlDictionary dictionary, XmlBinaryWriterSession session, bool ownsStream);
    }

    class XmlBinaryNodeWriter : XmlStreamNodeWriter
    {
        IXmlDictionary dictionary;
        XmlBinaryWriterSession session;
        bool inAttribute;
        bool inList;
        bool wroteAttributeValue;
        AttributeValue attributeValue;
        const int maxBytesPerChar = 3;
        int textNodeOffset;

        public XmlBinaryNodeWriter()
        {
            // Sanity check on node values
            Fx.Assert(XmlBinaryNodeType.MaxAttribute < XmlBinaryNodeType.MinElement &&
                                          XmlBinaryNodeType.MaxElement < XmlBinaryNodeType.MinText &&
                                          (int)XmlBinaryNodeType.MaxText < 256, "NodeTypes enumeration messed up");
        }

        public void SetOutput(Stream stream, IXmlDictionary dictionary, XmlBinaryWriterSession session, bool ownsStream)
        {
            this.dictionary = dictionary;
            this.session = session;
            this.inAttribute = false;
            this.inList = false;
            this.attributeValue.Clear();
            this.textNodeOffset = -1;
            SetOutput(stream, ownsStream, null);
        }

        void WriteNode(XmlBinaryNodeType nodeType)
        {
            WriteByte((byte)nodeType);
            textNodeOffset = -1;
        }

        void WroteAttributeValue()
        {
            if (wroteAttributeValue && !inList)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.XmlOnlySingleValue)));
            wroteAttributeValue = true;
        }

        void WriteTextNode(XmlBinaryNodeType nodeType)
        {
            if (inAttribute)
                WroteAttributeValue();
            Fx.Assert(nodeType >= XmlBinaryNodeType.MinText && nodeType <= XmlBinaryNodeType.MaxText && ((byte)nodeType & 1) == 0, "Invalid nodeType");
            WriteByte((byte)nodeType);
            textNodeOffset = this.BufferOffset - 1;
        }

        byte[] GetTextNodeBuffer(int size, out int offset)
        {
            if (inAttribute)
                WroteAttributeValue();
            byte[] buffer = GetBuffer(size, out offset);
            textNodeOffset = offset;
            return buffer;
        }

        void WriteTextNodeWithLength(XmlBinaryNodeType nodeType, int length)
        {
            Fx.Assert(nodeType == XmlBinaryNodeType.Chars8Text || nodeType == XmlBinaryNodeType.Bytes8Text || nodeType == XmlBinaryNodeType.UnicodeChars8Text, "");
            int offset;
            byte[] buffer = GetTextNodeBuffer(5, out offset);
            if (length < 256)
            {
                buffer[offset + 0] = (byte)nodeType;
                buffer[offset + 1] = (byte)length;
                Advance(2);
            }
            else if (length < 65536)
            {
                buffer[offset + 0] = (byte)(nodeType + 1 * 2); // WithEndElements interleave
                buffer[offset + 1] = (byte)length;
                length >>= 8;
                buffer[offset + 2] = (byte)length;
                Advance(3);
            }
            else
            {
                buffer[offset + 0] = (byte)(nodeType + 2 * 2); // WithEndElements interleave
                buffer[offset + 1] = (byte)length;
                length >>= 8;
                buffer[offset + 2] = (byte)length;
                length >>= 8;
                buffer[offset + 3] = (byte)length;
                length >>= 8;
                buffer[offset + 4] = (byte)length;
                Advance(5);
            }
        }

        void WriteTextNodeWithInt64(XmlBinaryNodeType nodeType, Int64 value)
        {
            int offset;
            byte[] buffer = GetTextNodeBuffer(9, out offset);
            buffer[offset + 0] = (byte)nodeType;
            buffer[offset + 1] = (byte)value;
            value >>= 8;
            buffer[offset + 2] = (byte)value;
            value >>= 8;
            buffer[offset + 3] = (byte)value;
            value >>= 8;
            buffer[offset + 4] = (byte)value;
            value >>= 8;
            buffer[offset + 5] = (byte)value;
            value >>= 8;
            buffer[offset + 6] = (byte)value;
            value >>= 8;
            buffer[offset + 7] = (byte)value;
            value >>= 8;
            buffer[offset + 8] = (byte)value;
            Advance(9);
        }

        public override void WriteDeclaration()
        {
        }

        public override void WriteStartElement(string prefix, string localName)
        {
            if (prefix.Length == 0)
            {
                WriteNode(XmlBinaryNodeType.ShortElement);
                WriteName(localName);
            }
            else
            {
                char ch = prefix[0];

                if (prefix.Length == 1 && ch >= 'a' && ch <= 'z')
                {
                    WritePrefixNode(XmlBinaryNodeType.PrefixElementA, ch - 'a');
                    WriteName(localName);
                }
                else
                {
                    WriteNode(XmlBinaryNodeType.Element);
                    WriteName(prefix);
                    WriteName(localName);
                }
            }
        }

        void WritePrefixNode(XmlBinaryNodeType nodeType, int ch)
        {
            WriteNode((XmlBinaryNodeType)((int)nodeType + ch));
        }

        public override void WriteStartElement(string prefix, XmlDictionaryString localName)
        {
            int key;
            if (!TryGetKey(localName, out key))
            {
#if LOG_NON_DICTIONARY_WRITES
                XmlBinaryWriter.OnNonDictionaryWrite("WriteStartElement", true, localName.Value, "...");
#endif
                WriteStartElement(prefix, localName.Value);
            }
            else
            {
                if (prefix.Length == 0)
                {
                    WriteNode(XmlBinaryNodeType.ShortDictionaryElement);
                    WriteDictionaryString(localName, key);
                }
                else
                {
                    char ch = prefix[0];

                    if (prefix.Length == 1 && ch >= 'a' && ch <= 'z')
                    {
                        WritePrefixNode(XmlBinaryNodeType.PrefixDictionaryElementA, ch - 'a');
                        WriteDictionaryString(localName, key);
                    }
                    else
                    {
                        WriteNode(XmlBinaryNodeType.DictionaryElement);
                        WriteName(prefix);
                        WriteDictionaryString(localName, key);
                    }
                }
            }
        }

        public override void WriteEndStartElement(bool isEmpty)
        {
            if (isEmpty)
            {
                WriteEndElement();
            }
        }

        public override void WriteEndElement(string prefix, string localName)
        {
            WriteEndElement();
        }

        void WriteEndElement()
        {
            if (textNodeOffset != -1)
            {
                byte[] buffer = this.StreamBuffer;
                XmlBinaryNodeType nodeType = (XmlBinaryNodeType)buffer[textNodeOffset];
                Fx.Assert(nodeType >= XmlBinaryNodeType.MinText && nodeType <= XmlBinaryNodeType.MaxText && ((byte)nodeType & 1) == 0, "");
                buffer[textNodeOffset] = (byte)(nodeType + 1);
                textNodeOffset = -1;
            }
            else
            {
                WriteNode(XmlBinaryNodeType.EndElement);
            }
        }

        public override void WriteStartAttribute(string prefix, string localName)
        {
            if (prefix.Length == 0)
            {
                WriteNode(XmlBinaryNodeType.ShortAttribute);
                WriteName(localName);
            }
            else
            {
                char ch = prefix[0];
                if (prefix.Length == 1 && ch >= 'a' && ch <= 'z')
                {
                    WritePrefixNode(XmlBinaryNodeType.PrefixAttributeA, ch - 'a');
                    WriteName(localName);
                }
                else
                {
                    WriteNode(XmlBinaryNodeType.Attribute);
                    WriteName(prefix);
                    WriteName(localName);
                }
            }
            inAttribute = true;
            wroteAttributeValue = false;
        }

        public override void WriteStartAttribute(string prefix, XmlDictionaryString localName)
        {
            int key;
            if (!TryGetKey(localName, out key))
            {
#if LOG_NON_DICTIONARY_WRITES
                XmlBinaryWriter.OnNonDictionaryWrite("WriteStartAttribute", true, localName.Value, "...");
#endif
                WriteStartAttribute(prefix, localName.Value);
            }
            else
            {
                if (prefix.Length == 0)
                {
                    WriteNode(XmlBinaryNodeType.ShortDictionaryAttribute);
                    WriteDictionaryString(localName, key);
                }
                else
                {
                    char ch = prefix[0];
                    if (prefix.Length == 1 && ch >= 'a' && ch <= 'z')
                    {
                        WritePrefixNode(XmlBinaryNodeType.PrefixDictionaryAttributeA, ch - 'a');
                        WriteDictionaryString(localName, key);
                    }
                    else
                    {
                        WriteNode(XmlBinaryNodeType.DictionaryAttribute);
                        WriteName(prefix);
                        WriteDictionaryString(localName, key);
                    }
                }
                inAttribute = true;
                wroteAttributeValue = false;
            }
        }

        public override void WriteEndAttribute()
        {
            inAttribute = false;
            if (!wroteAttributeValue)
            {
                attributeValue.WriteTo(this);
            }
            textNodeOffset = -1;
        }

        public override void WriteXmlnsAttribute(string prefix, string ns)
        {
            if (prefix.Length == 0)
            {
                WriteNode(XmlBinaryNodeType.ShortXmlnsAttribute);
                WriteName(ns);
            }
            else
            {
                WriteNode(XmlBinaryNodeType.XmlnsAttribute);
                WriteName(prefix);
                WriteName(ns);
            }
        }

        public override void WriteXmlnsAttribute(string prefix, XmlDictionaryString ns)
        {
            int key;
            if (!TryGetKey(ns, out key))
            {
                WriteXmlnsAttribute(prefix, ns.Value);
            }
            else
            {
                if (prefix.Length == 0)
                {
                    WriteNode(XmlBinaryNodeType.ShortDictionaryXmlnsAttribute);
                    WriteDictionaryString(ns, key);
                }
                else
                {
                    WriteNode(XmlBinaryNodeType.DictionaryXmlnsAttribute);
                    WriteName(prefix);
                    WriteDictionaryString(ns, key);
                }
            }
        }

        bool TryGetKey(XmlDictionaryString s, out int key)
        {
            key = -1;
            if (s.Dictionary == dictionary)
            {
                key = s.Key * 2;
                return true;
            }
            XmlDictionaryString t;
            if (dictionary != null && dictionary.TryLookup(s, out t))
            {
                Fx.Assert(t.Dictionary == dictionary, "");
                key = t.Key * 2;
                return true;
            }
            if (session == null)
                return false;
            int sessionKey;
            if (!session.TryLookup(s, out sessionKey))
            {
                if (!session.TryAdd(s, out sessionKey))
                    return false;
            }
            key = sessionKey * 2 + 1;
            return true;
        }

        void WriteDictionaryString(XmlDictionaryString s, int key)
        {
            WriteMultiByteInt32(key);
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe void WriteName(string s)
        {
            int length = s.Length;
            if (length == 0)
            {
                WriteByte(0);
            }
            else
            {
                fixed (char* pch = s)
                {
                    UnsafeWriteName(pch, length);
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe void UnsafeWriteName(char* chars, int charCount)
        {
            if (charCount < 128 / maxBytesPerChar)
            {
                // Optimize if we know we can fit the converted string in the buffer
                // so we don't have to make a pass to count the bytes

                // 1 byte for the length
                int offset;
                byte[] buffer = GetBuffer(1 + charCount * maxBytesPerChar, out offset);
                int length = UnsafeGetUTF8Chars(chars, charCount, buffer, offset + 1);
                Fx.Assert(length < 128, "");
                buffer[offset] = (byte)length;
                Advance(1 + length);
            }
            else
            {
                int byteCount = UnsafeGetUTF8Length(chars, charCount);
                WriteMultiByteInt32(byteCount);
                UnsafeWriteUTF8Chars(chars, charCount);
            }
        }

        void WriteMultiByteInt32(int i)
        {
            int offset;
            byte[] buffer = GetBuffer(5, out offset);

            int startOffset = offset;
            while ((i & 0xFFFFFF80) != 0)
            {
                buffer[offset++] = (byte)((i & 0x7F) | 0x80);
                i >>= 7;
            }
            buffer[offset++] = (byte)i;
            Advance(offset - startOffset);
        }

        public override void WriteComment(string value)
        {
            WriteNode(XmlBinaryNodeType.Comment);
            WriteName(value);
        }

        public override void WriteCData(string value)
        {
            WriteText(value);
        }

        void WriteEmptyText()
        {
            WriteTextNode(XmlBinaryNodeType.EmptyText);
        }

        public override void WriteBoolText(bool value)
        {
            if (value)
            {
                WriteTextNode(XmlBinaryNodeType.TrueText);
            }
            else
            {
                WriteTextNode(XmlBinaryNodeType.FalseText);
            }
        }

        public override void WriteInt32Text(int value)
        {
            if (value >= -128 && value < 128)
            {
                if (value == 0)
                {
                    WriteTextNode(XmlBinaryNodeType.ZeroText);
                }
                else if (value == 1)
                {
                    WriteTextNode(XmlBinaryNodeType.OneText);
                }
                else
                {
                    int offset;
                    byte[] buffer = GetTextNodeBuffer(2, out offset);
                    buffer[offset + 0] = (byte)XmlBinaryNodeType.Int8Text;
                    buffer[offset + 1] = (byte)value;
                    Advance(2);

                }
            }
            else if (value >= -32768 && value < 32768)
            {
                int offset;
                byte[] buffer = GetTextNodeBuffer(3, out offset);
                buffer[offset + 0] = (byte)XmlBinaryNodeType.Int16Text;
                buffer[offset + 1] = (byte)value;
                value >>= 8;
                buffer[offset + 2] = (byte)value;
                Advance(3);
            }
            else
            {
                int offset;
                byte[] buffer = GetTextNodeBuffer(5, out offset);
                buffer[offset + 0] = (byte)XmlBinaryNodeType.Int32Text;
                buffer[offset + 1] = (byte)value;
                value >>= 8;
                buffer[offset + 2] = (byte)value;
                value >>= 8;
                buffer[offset + 3] = (byte)value;
                value >>= 8;
                buffer[offset + 4] = (byte)value;
                Advance(5);
            }
        }

        public override void WriteInt64Text(Int64 value)
        {
            if (value >= int.MinValue && value <= int.MaxValue)
            {
                WriteInt32Text((int)value);
            }
            else
            {
                WriteTextNodeWithInt64(XmlBinaryNodeType.Int64Text, value);
            }
        }

        public override void WriteUInt64Text(UInt64 value)
        {
            if (value <= Int64.MaxValue)
            {
                WriteInt64Text((Int64)value);
            }
            else
            {
                WriteTextNodeWithInt64(XmlBinaryNodeType.UInt64Text, (Int64)value);
            }
        }

        void WriteInt64(Int64 value)
        {
            int offset;
            byte[] buffer = GetBuffer(8, out offset);
            buffer[offset + 0] = (byte)value;
            value >>= 8;
            buffer[offset + 1] = (byte)value;
            value >>= 8;
            buffer[offset + 2] = (byte)value;
            value >>= 8;
            buffer[offset + 3] = (byte)value;
            value >>= 8;
            buffer[offset + 4] = (byte)value;
            value >>= 8;
            buffer[offset + 5] = (byte)value;
            value >>= 8;
            buffer[offset + 6] = (byte)value;
            value >>= 8;
            buffer[offset + 7] = (byte)value;
            Advance(8);
        }

        public override void WriteBase64Text(byte[] trailBytes, int trailByteCount, byte[] base64Buffer, int base64Offset, int base64Count)
        {
            if (inAttribute)
            {
                attributeValue.WriteBase64Text(trailBytes, trailByteCount, base64Buffer, base64Offset, base64Count);
            }
            else
            {
                int length = trailByteCount + base64Count;
                if (length > 0)
                {
                    WriteTextNodeWithLength(XmlBinaryNodeType.Bytes8Text, length);
                    if (trailByteCount > 0)
                    {
                        int offset;
                        byte[] buffer = GetBuffer(trailByteCount, out offset);
                        for (int i = 0; i < trailByteCount; i++)
                            buffer[offset + i] = trailBytes[i];
                        Advance(trailByteCount);
                    }
                    if (base64Count > 0)
                    {
                        WriteBytes(base64Buffer, base64Offset, base64Count);
                    }
                }
                else
                {
                    WriteEmptyText();
                }
            }
        }

        public override void WriteText(XmlDictionaryString value)
        {
            if (inAttribute)
            {
                attributeValue.WriteText(value);
            }
            else
            {
                int key;
                if (!TryGetKey(value, out key))
                {
                    WriteText(value.Value);
                }
                else
                {
                    WriteTextNode(XmlBinaryNodeType.DictionaryText);
                    WriteDictionaryString(value, key);
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteText(string value)
        {
            if (inAttribute)
            {
                attributeValue.WriteText(value);
            }
            else
            {
                if (value.Length > 0)
                {
                    fixed (char* pch = value)
                    {
                        UnsafeWriteText(pch, value.Length);
                    }
                }
                else
                {
                    WriteEmptyText();
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteText(char[] chars, int offset, int count)
        {
            if (inAttribute)
            {
                attributeValue.WriteText(new string(chars, offset, count));
            }
            else
            {
                if (count > 0)
                {
                    fixed (char* pch = &chars[offset])
                    {
                        UnsafeWriteText(pch, count);
                    }
                }
                else
                {
                    WriteEmptyText();
                }
            }
        }

        public override void WriteText(byte[] chars, int charOffset, int charCount)
        {
            WriteTextNodeWithLength(XmlBinaryNodeType.Chars8Text, charCount);
            WriteBytes(chars, charOffset, charCount);
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe void UnsafeWriteText(char* chars, int charCount)
        {
            // Callers should handle zero
            Fx.Assert(charCount > 0, "");

            if (charCount == 1)
            {
                char ch = chars[0];
                if (ch == '0')
                {
                    WriteTextNode(XmlBinaryNodeType.ZeroText);
                    return;
                }
                if (ch == '1')
                {
                    WriteTextNode(XmlBinaryNodeType.OneText);
                    return;
                }
            }

            if (charCount <= byte.MaxValue / maxBytesPerChar)
            {
                // Optimize if we know we can fit the converted string in the buffer
                // so we don't have to make a pass to count the bytes

                int offset;
                byte[] buffer = GetBuffer(1 + 1 + charCount * maxBytesPerChar, out offset);
                int length = UnsafeGetUTF8Chars(chars, charCount, buffer, offset + 2);

                if (length / 2 <= charCount)
                {
                    buffer[offset] = (byte)XmlBinaryNodeType.Chars8Text;
                }
                else
                {
                    buffer[offset] = (byte)XmlBinaryNodeType.UnicodeChars8Text;
                    length = UnsafeGetUnicodeChars(chars, charCount, buffer, offset + 2);
                }
                textNodeOffset = offset;
                Fx.Assert(length <= byte.MaxValue, "");
                buffer[offset + 1] = (byte)length;
                Advance(2 + length);
            }
            else
            {
                int byteCount = UnsafeGetUTF8Length(chars, charCount);
                if (byteCount / 2 > charCount)
                {
                    WriteTextNodeWithLength(XmlBinaryNodeType.UnicodeChars8Text, charCount * 2);
                    UnsafeWriteUnicodeChars(chars, charCount);
                }
                else
                {
                    WriteTextNodeWithLength(XmlBinaryNodeType.Chars8Text, byteCount);
                    UnsafeWriteUTF8Chars(chars, charCount);
                }
            }
        }

        public override void WriteEscapedText(string value)
        {
            WriteText(value);
        }

        public override void WriteEscapedText(XmlDictionaryString value)
        {
            WriteText(value);
        }

        public override void WriteEscapedText(char[] chars, int offset, int count)
        {
            WriteText(chars, offset, count);
        }

        public override void WriteEscapedText(byte[] chars, int offset, int count)
        {
            WriteText(chars, offset, count);
        }

        public override void WriteCharEntity(int ch)
        {
            if (ch > char.MaxValue)
            {
                SurrogateChar sch = new SurrogateChar(ch);
                char[] chars = new char[2] { sch.HighChar, sch.LowChar, };
                WriteText(chars, 0, 2);
            }
            else
            {
                char[] chars = new char[1] { (char)ch };
                WriteText(chars, 0, 1);
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteFloatText(float f)
        {
            long l;
            if (f >= long.MinValue && f <= long.MaxValue && (l = (long)f) == f)
            {
                WriteInt64Text(l);
            }
            else
            {
                int offset;
                byte[] buffer = GetTextNodeBuffer(1 + sizeof(float), out offset);
                byte* bytes = (byte*)&f;
                buffer[offset + 0] = (byte)XmlBinaryNodeType.FloatText;
                buffer[offset + 1] = bytes[0];
                buffer[offset + 2] = bytes[1];
                buffer[offset + 3] = bytes[2];
                buffer[offset + 4] = bytes[3];
                Advance(1 + sizeof(float));
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteDoubleText(double d)
        {
            float f;
            if (d >= float.MinValue && d <= float.MaxValue && (f = (float)d) == d)
            {
                WriteFloatText(f);
            }
            else
            {
                int offset;
                byte[] buffer = GetTextNodeBuffer(1 + sizeof(double), out offset);
                byte* bytes = (byte*)&d;
                buffer[offset + 0] = (byte)XmlBinaryNodeType.DoubleText;
                buffer[offset + 1] = bytes[0];
                buffer[offset + 2] = bytes[1];
                buffer[offset + 3] = bytes[2];
                buffer[offset + 4] = bytes[3];
                buffer[offset + 5] = bytes[4];
                buffer[offset + 6] = bytes[5];
                buffer[offset + 7] = bytes[6];
                buffer[offset + 8] = bytes[7];
                Advance(1 + sizeof(double));
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteDecimalText(decimal d)
        {
            int offset;
            byte[] buffer = GetTextNodeBuffer(1 + sizeof(decimal), out offset);
            byte* bytes = (byte*)&d;
            buffer[offset++] = (byte)XmlBinaryNodeType.DecimalText;
            for (int i = 0; i < sizeof(decimal); i++)
            {
                buffer[offset++] = bytes[i];
            }
            Advance(1 + sizeof(decimal));
        }

        public override void WriteDateTimeText(DateTime dt)
        {
            WriteTextNodeWithInt64(XmlBinaryNodeType.DateTimeText, dt.ToBinary());
        }

        public override void WriteUniqueIdText(UniqueId value)
        {
            if (value.IsGuid)
            {
                int offset;
                byte[] buffer = GetTextNodeBuffer(17, out offset);
                buffer[offset] = (byte)XmlBinaryNodeType.UniqueIdText;
                value.TryGetGuid(buffer, offset + 1);
                Advance(17);
            }
            else
            {
                WriteText(value.ToString());
            }
        }

        public override void WriteGuidText(Guid guid)
        {
            int offset;
            byte[] buffer = GetTextNodeBuffer(17, out offset);
            buffer[offset] = (byte)XmlBinaryNodeType.GuidText;
            Buffer.BlockCopy(guid.ToByteArray(), 0, buffer, offset + 1, 16);
            Advance(17);
        }

        public override void WriteTimeSpanText(TimeSpan value)
        {
            WriteTextNodeWithInt64(XmlBinaryNodeType.TimeSpanText, value.Ticks);
        }

        public override void WriteStartListText()
        {
            Fx.Assert(!inList, "");
            inList = true;
            WriteNode(XmlBinaryNodeType.StartListText);
        }

        public override void WriteListSeparator()
        {
        }

        public override void WriteEndListText()
        {
            Fx.Assert(inList, "");
            inList = false;
            wroteAttributeValue = true;
            WriteNode(XmlBinaryNodeType.EndListText);
        }

        public void WriteArrayNode()
        {
            WriteNode(XmlBinaryNodeType.Array);
        }

        void WriteArrayInfo(XmlBinaryNodeType nodeType, int count)
        {
            WriteNode(nodeType);
            WriteMultiByteInt32(count);
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe public void UnsafeWriteArray(XmlBinaryNodeType nodeType, int count, byte* array, byte* arrayMax)
        {
            WriteArrayInfo(nodeType, count);
            UnsafeWriteArray(array, (int)(arrayMax - array));
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe void UnsafeWriteArray(byte* array, int byteCount)
        {
            base.UnsafeWriteBytes(array, byteCount);
        }

        public void WriteDateTimeArray(DateTime[] array, int offset, int count)
        {
            WriteArrayInfo(XmlBinaryNodeType.DateTimeTextWithEndElement, count);
            for (int i = 0; i < count; i++)
            {
                WriteInt64(array[offset + i].ToBinary());
            }
        }

        public void WriteGuidArray(Guid[] array, int offset, int count)
        {
            WriteArrayInfo(XmlBinaryNodeType.GuidTextWithEndElement, count);
            for (int i = 0; i < count; i++)
            {
                byte[] buffer = array[offset + i].ToByteArray();
                WriteBytes(buffer, 0, 16);
            }
        }

        public void WriteTimeSpanArray(TimeSpan[] array, int offset, int count)
        {
            WriteArrayInfo(XmlBinaryNodeType.TimeSpanTextWithEndElement, count);
            for (int i = 0; i < count; i++)
            {
                WriteInt64(array[offset + i].Ticks);
            }
        }

        public override void WriteQualifiedName(string prefix, XmlDictionaryString localName)
        {
            if (prefix.Length == 0)
            {
                WriteText(localName);
            }
            else
            {
                char ch = prefix[0];
                int key;
                if (prefix.Length == 1 && (ch >= 'a' && ch <= 'z') && TryGetKey(localName, out key))
                {
                    WriteTextNode(XmlBinaryNodeType.QNameDictionaryText);
                    WriteByte((byte)(ch - 'a'));
                    WriteDictionaryString(localName, key);
                }
                else
                {
                    WriteText(prefix);
                    WriteText(":");
                    WriteText(localName);
                }
            }
        }

        protected override void FlushBuffer()
        {
            base.FlushBuffer();
            textNodeOffset = -1;
        }

        public override void Close()
        {
            base.Close();
            attributeValue.Clear();
        }

        struct AttributeValue
        {
            string captureText;
            XmlDictionaryString captureXText;
            MemoryStream captureStream;

            public void Clear()
            {
                captureText = null;
                captureXText = null;
                captureStream = null;
            }

            public void WriteText(string s)
            {
                if (captureStream != null)
                {
                    captureText = XmlConverter.Base64Encoding.GetString(captureStream.GetBuffer(), 0, (int)captureStream.Length);
                    captureStream = null;
                }

                if (captureXText != null)
                {
                    captureText = captureXText.Value;
                    captureXText = null;
                }

                if (captureText == null || captureText.Length == 0)
                {
                    captureText = s;
                }
                else
                {
                    captureText += s;
                }
            }

            public void WriteText(XmlDictionaryString s)
            {
                if (captureText != null || captureStream != null)
                {
                    WriteText(s.Value);
                }
                else
                {
                    captureXText = s;
                }
            }

            public void WriteBase64Text(byte[] trailBytes, int trailByteCount, byte[] buffer, int offset, int count)
            {
                if (captureText != null || captureXText != null)
                {
                    if (trailByteCount > 0)
                    {
                        WriteText(XmlConverter.Base64Encoding.GetString(trailBytes, 0, trailByteCount));
                    }
                    WriteText(XmlConverter.Base64Encoding.GetString(buffer, offset, count));
                }
                else
                {
                    if (captureStream == null)
                        captureStream = new MemoryStream();

                    if (trailByteCount > 0)
                        captureStream.Write(trailBytes, 0, trailByteCount);

                    captureStream.Write(buffer, offset, count);
                }
            }

            public void WriteTo(XmlBinaryNodeWriter writer)
            {
                if (captureText != null)
                {
                    writer.WriteText(captureText);
                    captureText = null;
                }
                else if (captureXText != null)
                {
                    writer.WriteText(captureXText);
                    captureXText = null;
                }
                else if (captureStream != null)
                {
                    writer.WriteBase64Text(null, 0, captureStream.GetBuffer(), 0, (int)captureStream.Length);
                    captureStream = null;
                }
                else
                {
                    writer.WriteEmptyText();
                }
            }
        }
    }

    class XmlBinaryWriter : XmlBaseWriter, IXmlBinaryWriterInitializer
    {
        XmlBinaryNodeWriter writer;
        char[] chars;
        byte[] bytes;

#if LOG_NON_DICTIONARY_WRITES
        static readonly bool logCallStackOnNonDictionaryWrites = true;
        static readonly bool logWriteStringNonDictionaryWrites = true;

        internal static void OnNonDictionaryWrite(string apiName, bool isDictionaryMismatchIssue, string s1, string s2)
        {
            StringBuilder log = new StringBuilder();
            log.AppendFormat("> Text string write in binary: {0}(\"{1}\"", apiName, s1);
            if (s2 != null)
                log.AppendFormat(", \"{0}\"", s2);
            log.AppendLine(")");
            if (isDictionaryMismatchIssue)
            {
                log.AppendLine("  Issue: Dictionary mismatch between XmlDictionaryWriter and XmlDictionaryString");
            }
            if (logCallStackOnNonDictionaryWrites)
            {
                string callStack = new System.Diagnostics.StackTrace().ToString();
                log.AppendLine("  Callstack:");
                log.AppendFormat("{0}", callStack.Substring(callStack.IndexOf(Environment.NewLine) + Environment.NewLine.Length));
            }
            Console.WriteLine("{0}", log);
        }

        public override void WriteStartAttribute(string prefix, string localName, string namespaceUri)
        {
            OnNonDictionaryWrite("WriteStartAttribute", false, localName, namespaceUri);
            base.WriteStartAttribute(prefix, localName, namespaceUri);
        }

        public override void WriteStartElement(string prefix, string localName, string namespaceUri)
        {
            OnNonDictionaryWrite("WriteStartElement", false, localName, namespaceUri);
            base.WriteStartElement(prefix, localName, namespaceUri);
        }

        public override void WriteString(string value)
        {
            if (logWriteStringNonDictionaryWrites && 
                !typeof(XmlBinaryWriter).Assembly.Equals(System.Reflection.Assembly.GetCallingAssembly()))
                OnNonDictionaryWrite("WriteString", false, value, null);
            base.WriteString(value);
        }
#endif

        public void SetOutput(Stream stream, IXmlDictionary dictionary, XmlBinaryWriterSession session, bool ownsStream)
        {
            if (stream == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("stream"));
            if (writer == null)
                writer = new XmlBinaryNodeWriter();
            writer.SetOutput(stream, dictionary, session, ownsStream);
            SetOutput(writer);
        }

        protected override XmlSigningNodeWriter CreateSigningNodeWriter()
        {
            return new XmlSigningNodeWriter(false);
        }

        protected override void WriteTextNode(XmlDictionaryReader reader, bool attribute)
        {
            Type type = reader.ValueType;
            if (type == typeof(string))
            {
                XmlDictionaryString value;
                if (reader.TryGetValueAsDictionaryString(out value))
                {
                    WriteString(value);
                }
                else
                {
                    if (reader.CanReadValueChunk)
                    {
                        if (chars == null)
                        {
                            chars = new char[256];
                        }
                        int count;
                        while ((count = reader.ReadValueChunk(chars, 0, chars.Length)) > 0)
                        {
                            this.WriteChars(chars, 0, count);
                        }
                    }
                    else
                    {
                        WriteString(reader.Value);
                    }
                }
                if (!attribute)
                {
                    reader.Read();
                }
            }
            else if (type == typeof(byte[]))
            {
                if (reader.CanReadBinaryContent)
                {
                    // Its best to read in buffers that are a multiple of 3 so we don't break base64 boundaries when converting text
                    if (bytes == null)
                    {
                        bytes = new byte[384];
                    }
                    int count;
                    while ((count = reader.ReadValueAsBase64(bytes, 0, bytes.Length)) > 0)
                    {
                        this.WriteBase64(bytes, 0, count);
                    }
                }
                else
                {
                    WriteString(reader.Value);
                }
                if (!attribute)
                {
                    reader.Read();
                }
            }
            else if (type == typeof(int))
                WriteValue(reader.ReadContentAsInt());
            else if (type == typeof(long))
                WriteValue(reader.ReadContentAsLong());
            else if (type == typeof(bool))
                WriteValue(reader.ReadContentAsBoolean());
            else if (type == typeof(double))
                WriteValue(reader.ReadContentAsDouble());
            else if (type == typeof(DateTime))
                WriteValue(reader.ReadContentAsDateTime());
            else if (type == typeof(float))
                WriteValue(reader.ReadContentAsFloat());
            else if (type == typeof(decimal))
                WriteValue(reader.ReadContentAsDecimal());
            else if (type == typeof(UniqueId))
                WriteValue(reader.ReadContentAsUniqueId());
            else if (type == typeof(Guid))
                WriteValue(reader.ReadContentAsGuid());
            else if (type == typeof(TimeSpan))
                WriteValue(reader.ReadContentAsTimeSpan());
            else
                WriteValue(reader.ReadContentAsObject());
        }

        void WriteStartArray(string prefix, string localName, string namespaceUri, int count)
        {
            StartArray(count);
            writer.WriteArrayNode();
            WriteStartElement(prefix, localName, namespaceUri);
            WriteEndElement();
        }

        void WriteStartArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, int count)
        {
            StartArray(count);
            writer.WriteArrayNode();
            WriteStartElement(prefix, localName, namespaceUri);
            WriteEndElement();
        }

        void WriteEndArray()
        {
            EndArray();
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe void UnsafeWriteArray(string prefix, string localName, string namespaceUri,
                               XmlBinaryNodeType nodeType, int count, byte* array, byte* arrayMax)
        {
            WriteStartArray(prefix, localName, namespaceUri, count);
            writer.UnsafeWriteArray(nodeType, count, array, arrayMax);
            WriteEndArray();
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code. Caller needs to validate arguments.")]
        [SecurityCritical]
        unsafe void UnsafeWriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri,
                               XmlBinaryNodeType nodeType, int count, byte* array, byte* arrayMax)
        {
            WriteStartArray(prefix, localName, namespaceUri, count);
            writer.UnsafeWriteArray(nodeType, count, array, arrayMax);
            WriteEndArray();
        }

        void CheckArray(Array array, int offset, int count)
        {
            if (array == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("array"));
            if (offset < 0)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("offset", SR.GetString(SR.ValueMustBeNonNegative)));
            if (offset > array.Length)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("offset", SR.GetString(SR.OffsetExceedsBufferSize, array.Length)));
            if (count < 0)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("count", SR.GetString(SR.ValueMustBeNonNegative)));
            if (count > array.Length - offset)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("count", SR.GetString(SR.SizeExceedsRemainingBufferSpace, array.Length - offset)));
        }

        // bool
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, bool[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (bool* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.BoolTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, bool[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (bool* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.BoolTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // Int16
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, Int16[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int16* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int16TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, Int16[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int16* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int16TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // Int32
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, Int32[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int32* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int32TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, Int32[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int32* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int32TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // Int64
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, Int64[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int64* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int64TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, Int64[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (Int64* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.Int64TextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // float
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, float[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (float* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.FloatTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, float[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (float* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.FloatTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // double
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, double[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (double* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.DoubleTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, double[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (double* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.DoubleTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // decimal
        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, string localName, string namespaceUri, decimal[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (decimal* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.DecimalTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.",
            Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")]
        [SecuritySafeCritical]
        unsafe public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, decimal[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    fixed (decimal* items = &array[offset])
                    {
                        UnsafeWriteArray(prefix, localName, namespaceUri, XmlBinaryNodeType.DecimalTextWithEndElement, count, (byte*)items, (byte*)&items[count]);
                    }
                }
            }
        }

        // DateTime
        public override void WriteArray(string prefix, string localName, string namespaceUri, DateTime[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteDateTimeArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }

        public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, DateTime[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteDateTimeArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }

        // Guid
        public override void WriteArray(string prefix, string localName, string namespaceUri, Guid[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteGuidArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }

        public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, Guid[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteGuidArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }

        // TimeSpan
        public override void WriteArray(string prefix, string localName, string namespaceUri, TimeSpan[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteTimeSpanArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }

        public override void WriteArray(string prefix, XmlDictionaryString localName, XmlDictionaryString namespaceUri, TimeSpan[] array, int offset, int count)
        {
            if (Signing)
                base.WriteArray(prefix, localName, namespaceUri, array, offset, count);
            else
            {
                CheckArray(array, offset, count);
                if (count > 0)
                {
                    WriteStartArray(prefix, localName, namespaceUri, count);
                    writer.WriteTimeSpanArray(array, offset, count);
                    WriteEndArray();
                }
            }
        }
    }
}