/// <summary>
/// Reads the contents of the <see cref="EhfaStructure" /> from the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <exception cref="System.ArgumentNullException">The stream is null.</exception>
/// <exception cref="System.ArgumentException">The stream is invalid.</exception>
public virtual void Read(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream), "The stream is null.");
}
try
{
foreach (DictionaryEntry structureItem in _type.Items)
{
IEhfaObject value = null;
IEhfaObjectType item = (IEhfaObjectType)structureItem.Value;
if (item is EhfaPrimitiveType)
{
value = new EhfaObject(item as EhfaPrimitiveType);
value.Read(stream);
_objects.Add((String)structureItem.Key, value);
}
else if (item is EhfaStructureType)
{
if (item.DataPlacement == DataPlacement.Internal)
{
value = new EhfaStructure(item as EhfaStructureType);
value.Read(stream);
_objects.Add((String)structureItem.Key, value);
}
if (item.DataPlacement != DataPlacement.Internal)
{
Byte[] temp = new Byte[4];
stream.Read(temp, 0, 4);
Int32 objectRepeatCount = (Int32)EndianBitConverter.ToUInt32(temp, ByteOrder.LittleEndian);
stream.Read(temp, 0, 4);
UInt32 pointer = EndianBitConverter.ToUInt32(temp, ByteOrder.LittleEndian);
_objectLocations[(String)structureItem.Key] = new List <IEhfaObject>();
if (objectRepeatCount == 0)
{
continue;
}
while (objectRepeatCount-- > 0)
{
value = new EhfaStructure(item as EhfaStructureType);
value.Read(stream);
_objectLocations[(String)structureItem.Key].Add(value as EhfaStructure);
}
}
}
}
}
catch (Exception ex)
{
throw new ArgumentException("The stream is invalid.", nameof(stream), ex);
}
}
/// <summary>
/// Parses the item definitions.
/// </summary>
/// <param name="definitions">The item definitions.</param>
private void ParseItemDefinitions(String definitions)
{
Items = new OrderedDictionary();
Int32 index = 0;
while (index < definitions.Length)
{
Int32 itemNumber = GetItemNumber(definitions, ref index);
DataPlacement placement = GetDataPlacement(definitions, ref index);
ItemType itemType = GetItemType(definitions, ref index);
List <String> enumItems = null;
IEhfaObjectType ehfaObjectType = null;
if (itemType == ItemType.Enum)
{
enumItems = GetEnumItems(definitions, ref index);
}
if (itemType == ItemType.PreviouslyDefined)
{
ehfaObjectType = GetPreviouslyDefinedObjectType(definitions, placement, ref index);
}
if (itemType == ItemType.FollowedDefined)
{
ehfaObjectType = GetFollowingDefinedObjectType(definitions, ref index);
}
String itemName = GetItemName(definitions, ref index);
if (ehfaObjectType == null)
{
if (itemType == ItemType.Enum)
{
ehfaObjectType = new EhfaPrimitiveType(itemName, itemNumber, placement, enumItems);
}
else
{
ehfaObjectType = new EhfaPrimitiveType(itemName, itemNumber, itemType, placement);
}
}
Items.Add(itemName, ehfaObjectType);
}
}