private void Decode(IEnumerable <byte> bytes)
{
currentTagCodePage = 0;
currentAttributeCodePage = 0;
var isAttribute = false;
var tagHasAttributes = false;
var tagHasContent = false;
XmlNode activeNode = this;
XmlAttribute activeAttribute = null;
var byteQueue = new Queue <byte>(bytes);
//Get the WBXML version number;
VersionNumber = (byteQueue.Dequeue() / 10.0) + 1.0;
//Get the value of the public identifier
PublicIdentifier = GetInt(byteQueue);
if (PublicIdentifier == 0)
{
//TODO the publicIdentifier is defined as string inside the stringtable
var publicIdentifierStringTableIndex = GetInt(byteQueue);
}
//Get the charset for text encoding
Encoding = IanaCharacterSets.GetEncoding(GetInt(byteQueue));
var declaration = CreateXmlDeclaration("1.0", Encoding.WebName, null);
activeNode.AppendChild(declaration);
//Get the string table (use of the string table is not implemented)
var stringTableLength = GetInt(byteQueue);
if (stringTableLength > 0)
{
var byteStringTableQueue = new Queue <byte>();
for (int i = 0; i < stringTableLength; i++)
{
byteStringTableQueue.Enqueue(byteQueue.Dequeue());
}
var stringTableList = new List <string>();
while (byteStringTableQueue.Count > 0)
{
string stringTableItem = GetString(byteStringTableQueue);
stringTableList.Add(stringTableItem);
}
StringTable = new StringTable(stringTableList.ToArray());
}
//WBXML body
while (byteQueue.Count > 0)
{
var byteItem = byteQueue.Dequeue();
if (globalTokens.Contains(byteItem))
{
var globalToken = globalTokens.GetToken(byteItem);
switch (globalToken)
{
case GlobalTokens.Names.SWITCH_PAGE:
currentTagCodePage = byteQueue.Dequeue();
break;
case GlobalTokens.Names.END:
if (isAttribute)
{
isAttribute = false;
activeAttribute = null;
if (!tagHasContent)
{
activeNode = activeNode.ParentNode;
}
}
else
{
activeNode = activeNode.ParentNode;
}
break;
case GlobalTokens.Names.ENTITY:
var entityValue = GetInt(byteQueue);
var encodedEntity = GetEntity(entityValue);
if (isAttribute)
{
activeAttribute.InnerXml += encodedEntity;
}
else
{
activeNode.InnerXml += encodedEntity;
}
break;
case GlobalTokens.Names.STR_I:
if (isAttribute)
{
activeAttribute.InnerText += GetString(byteQueue);
}
else
{
activeNode.AppendChild(CreateTextNode(GetString(byteQueue)));
}
break;
case GlobalTokens.Names.LITERAL:
case GlobalTokens.Names.LITERAL_A:
case GlobalTokens.Names.LITERAL_AC:
case GlobalTokens.Names.LITERAL_C:
//TODO LITERALs are not implemented yet
var literalReference = GetInt(byteQueue);
break;
case GlobalTokens.Names.EXT_I_0:
case GlobalTokens.Names.EXT_I_1:
case GlobalTokens.Names.EXT_I_2:
//TODO EXT_I_x are not implemented yet
var extiString = GetString(byteQueue);
break;
case GlobalTokens.Names.PI:
//TODO PI is not implemented yet
var piByteList = new List <byte>();
while (byteQueue.Peek() != (byte)GlobalTokens.Names.END)
{
piByteList.Add(byteQueue.Dequeue());
}
byteQueue.Dequeue();
break;
case GlobalTokens.Names.EXT_T_0:
case GlobalTokens.Names.EXT_T_1:
case GlobalTokens.Names.EXT_T_2:
//TODO EXT_T_x are not implemented yet
var exttReference = GetInt(byteQueue);
break;
case GlobalTokens.Names.STR_T:
int strtReference = GetInt(byteQueue);
if (StringTable.ContainsString(strtReference))
{
var stringTableItem = StringTable.GetString(strtReference);
if (isAttribute)
{
activeAttribute.InnerText += stringTableItem.Value;
}
else
{
activeNode.AppendChild(CreateTextNode(stringTableItem.Value));
}
}
break;
case GlobalTokens.Names.EXT_0:
case GlobalTokens.Names.EXT_1:
case GlobalTokens.Names.EXT_2:
//TODO EXT_x are not implemented yet
break;
case GlobalTokens.Names.OPAQUE:
var opaqueLength = GetInt(byteQueue);
var opaqueByteArray = GetByteArray(byteQueue, opaqueLength);
var opaqueHexList = new List <string>();
foreach (byte opaqueByteItem in opaqueByteArray)
{
opaqueHexList.Add(opaqueByteItem.ToString("X2"));
}
activeNode.InnerText = string.Join("", opaqueHexList.ToArray());
break;
}
}
else if (!isAttribute)
{
tagHasAttributes = IsBitSet(byteItem, 7);
tagHasContent = IsBitSet(byteItem, 6);
byteItem &= 127;
byteItem &= 63;
string tagValue;
if (TagCodeSpace.GetCodePage(currentTagCodePage).ContainsTag(byteItem))
{
tagValue = TagCodeSpace.GetCodePage(currentTagCodePage).GetTag(byteItem).Name;
}
else
{
tagValue = "Tag_" + byteItem.ToString("X2");
}
var xmlElement = CreateElement(tagValue);
activeNode.AppendChild(xmlElement);
if (!tagHasContent && !tagHasAttributes)
{
continue;
}
activeNode = xmlElement;
if (tagHasAttributes)
{
isAttribute = true;
}
}
else
{
if (byteItem < 128)
{
if (AttributeCodeSpace.GetCodePage(currentAttributeCodePage).ContainsAttributeStart(byteItem))
{
var attributeStart =
AttributeCodeSpace.GetCodePage(currentAttributeCodePage).GetAttributeStart(byteItem);
var xmlAttribute = CreateAttribute(attributeStart.Name);
xmlAttribute.InnerText = attributeStart.Prefix;
activeNode.Attributes.Append(xmlAttribute);
activeAttribute = xmlAttribute;
}
else
{
XmlAttribute xmlAttribute = CreateAttribute("attribute_" + byteItem.ToString("X2"));
activeNode.Attributes.Append(xmlAttribute);
activeAttribute = xmlAttribute;
}
}
else
{
if (!AttributeCodeSpace.GetCodePage(currentAttributeCodePage).ContainsAttributeValue(byteItem))
{
continue;
}
var attributeValue =
AttributeCodeSpace.GetCodePage(currentAttributeCodePage).GetAttributeValue(byteItem);
activeAttribute.InnerText += attributeValue.Value;
}
}
}
}
private IEnumerable <byte> EncodeNode(XmlNode node)
{
var bytesList = new List <byte>();
switch (node.NodeType)
{
case XmlNodeType.Element:
if (node.Name == "characteristic")
{
currentAttributeCodePage = 0;
}
var hasAttributes = node.Attributes.Count > 0;
var hasContent = node.HasChildNodes;
var codePage = TagCodeSpace.ContainsTag(currentTagCodePage, node.Name);
if (codePage >= 0)
{
if (currentTagCodePage != codePage)
{
bytesList.Add((byte)GlobalTokens.Names.SWITCH_PAGE);
bytesList.Add((byte)codePage);
currentTagCodePage = codePage;
}
byte keyValue = TagCodeSpace.GetCodePage(currentTagCodePage).GetTag(node.Name).Token;
if (hasAttributes)
{
keyValue |= 128;
}
if (hasContent)
{
keyValue |= 64;
}
bytesList.Add(keyValue);
}
else
{
//TODO: unkown tag
}
if (hasAttributes)
{
foreach (XmlAttribute attribute in node.Attributes)
{
bytesList.AddRange(EncodeNode(attribute));
}
bytesList.Add((byte)GlobalTokens.Names.END);
}
if (hasContent)
{
bytesList.AddRange(EncodeNodes(node.ChildNodes));
bytesList.Add((byte)GlobalTokens.Names.END);
}
break;
case XmlNodeType.Text:
var isOpaqueData = false;
if (OpaqueDataExpressions.Count > 0)
{
foreach (OpaqueDataExpression expression in OpaqueDataExpressions)
{
if (expression.TagName.Equals(node.ParentNode.Name))
{
if (node.ParentNode.SelectSingleNode(expression.Expression) != null)
{
isOpaqueData = true;
break;
}
}
}
}
if (isOpaqueData)
{
var opaqueDataBytes = GetBytes(node.Value);
bytesList.Add((byte)GlobalTokens.Names.OPAQUE);
bytesList.AddRange(GetMultiByte(opaqueDataBytes.Length));
bytesList.AddRange(opaqueDataBytes);
}
else
{
string textValue = node.Value;
while (textValue.Length > 0)
{
var stringTableIndex = textValue.Length;
if (StringTable.ContainsString(textValue))
{
var stringTableItem = StringTable.GetString(textValue);
stringTableIndex = textValue.IndexOf(stringTableItem.Value);
if (stringTableIndex == 0)
{
bytesList.Add((byte)GlobalTokens.Names.STR_T);
bytesList.AddRange(GetMultiByte(stringTableItem.Index));
textValue = textValue.Substring(stringTableItem.Value.Length);
continue;
}
}
bytesList.Add((byte)GlobalTokens.Names.STR_I);
bytesList.AddRange(Encoding.GetBytes(textValue.Substring(0, stringTableIndex)));
bytesList.Add(0);
textValue = textValue.Substring(stringTableIndex);
}
}
break;
case XmlNodeType.EntityReference:
bytesList.Add((byte)GlobalTokens.Names.ENTITY);
var reference = (XmlEntityReference)node;
foreach (var stringItem in reference.InnerText.ToCharArray())
{
bytesList.AddRange(GetMultiByte(stringItem));
}
break;
case XmlNodeType.Attribute:
var attrCodePage = AttributeCodeSpace.ContainsAttributeStart(
currentAttributeCodePage, node.Name, node.Value);
if (attrCodePage >= 0)
{
if (currentAttributeCodePage != attrCodePage)
{
bytesList.Add((byte)GlobalTokens.Names.SWITCH_PAGE);
bytesList.Add((byte)attrCodePage);
currentAttributeCodePage = attrCodePage;
}
if (AttributeCodeSpace.GetCodePage(currentAttributeCodePage).ContainsAttributeStart(node.Name,
node.Value))
{
var attributeStart =
AttributeCodeSpace.GetCodePage(currentAttributeCodePage).GetAttributeStart(node.Name,
node.Value);
bytesList.Add(attributeStart.Token);
var postAttributeValue = node.Value.Substring(attributeStart.Prefix.Length);
while (postAttributeValue.Length > 0)
{
int attrValueIndex = postAttributeValue.Length;
if (
AttributeCodeSpace.GetCodePage(currentAttributeCodePage).ContainsAttributeValue(
postAttributeValue))
{
var attrValue = AttributeCodeSpace.GetCodePage(currentAttributeCodePage).GetAttributeValue(postAttributeValue);
attrValueIndex = postAttributeValue.IndexOf(attrValue.Value);
if (attrValueIndex == 0)
{
bytesList.Add(attrValue.Token);
postAttributeValue = postAttributeValue.Substring(attrValue.Value.Length);
continue;
}
}
var stringTableIndex = postAttributeValue.Length;
if (StringTable.ContainsString(postAttributeValue))
{
var stringTableItem = StringTable.GetString(postAttributeValue);
stringTableIndex = postAttributeValue.IndexOf(stringTableItem.Value);
if (stringTableIndex == 0)
{
bytesList.Add((byte)GlobalTokens.Names.STR_T);
bytesList.AddRange(GetMultiByte(stringTableItem.Index));
postAttributeValue = postAttributeValue.Substring(stringTableItem.Value.Length);
continue;
}
}
var firstReferenceIndex = Math.Min(attrValueIndex, stringTableIndex);
bytesList.Add((byte)GlobalTokens.Names.STR_I);
bytesList.AddRange(
Encoding.GetBytes(postAttributeValue.Substring(0, firstReferenceIndex)));
bytesList.Add(0);
postAttributeValue = postAttributeValue.Substring(firstReferenceIndex);
}
}
}
else
{
//TODO: unknown attribute
}
break;
}
return(bytesList.ToArray());
}