/// <summary>
/// Add support for parsing null terminated strings as System.String
/// </summary>
/// <param name="layouts">The layout manager that will hold the new layout</param>
/// <param name="encoding">The encoding used to parse string characters. Currently only UTF8 and ASCII are supported</param>
public static LayoutManager AddNullTerminatedString(this LayoutManager layouts, Encoding encoding)
{
layouts.AddLayout(new NullTerminatedStringLayout(encoding));
return(layouts);
}
public static LayoutManager AddEnumTypes(this LayoutManager layoutManager)
{
layoutManager.AddLayoutProvider(GetEnumLayout);
return(layoutManager);
}
/// <summary>
/// Add support for parsing null terminated strings as System.String
/// </summary>
public static LayoutManager AddNullTerminatedString(this LayoutManager layouts)
{
return(AddNullTerminatedString(layouts, Encoding.UTF8));
}
private static ILayout GetTStructLayout(Type tStructType, LayoutManager layoutManager, IEnumerable <string> enabledDefines, Type requiredBaseType)
{
if (!requiredBaseType.GetTypeInfo().IsAssignableFrom(tStructType))
{
return(null);
}
if (enabledDefines == null)
{
enabledDefines = new string[0];
}
TypeInfo typeInfo = tStructType.GetTypeInfo();
PackAttribute pack = typeInfo.GetCustomAttributes().Where(attr => attr is PackAttribute).Cast <PackAttribute>().SingleOrDefault();
FieldInfo[] reflectionFields = typeInfo.GetFields(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
reflectionFields = reflectionFields.OrderBy(f => f.MetadataToken).ToArray();
reflectionFields = reflectionFields.Where(f => !f.DeclaringType.Equals(typeof(TStruct))).ToArray();
reflectionFields = reflectionFields.Where(f => IsFieldIncludedInDefines(f, enabledDefines)).ToArray();
TField[] tFields = new TField[reflectionFields.Length];
uint alignCeiling = pack?.Pack ?? 8;
uint biggestAlignmentSoFar = 1;
uint curOffset = 0;
ILayout parentLayout = null;
Type baseType = tStructType.GetTypeInfo().BaseType;
if (!baseType.Equals(typeof(TStruct)))
{
// Treat base type as first member.
parentLayout = layoutManager.GetLayout(baseType);
uint align = Math.Min(parentLayout.NaturalAlignment, alignCeiling);
biggestAlignmentSoFar = Math.Max(biggestAlignmentSoFar, align);
curOffset += parentLayout.SizeAsBaseType;
}
// build the field list
for (int i = 0; i < reflectionFields.Length; i++)
{
ILayout fieldLayout = GetFieldLayout(reflectionFields[i], layoutManager);
uint fieldSize = fieldLayout.Size;
uint align = fieldLayout.NaturalAlignment;
align = Math.Min(align, alignCeiling);
biggestAlignmentSoFar = Math.Max(biggestAlignmentSoFar, align);
curOffset = AlignUp(curOffset, align);
tFields[i] = new TField(reflectionFields[i], fieldLayout, curOffset);
curOffset += fieldSize;
}
curOffset = AlignUp(curOffset, biggestAlignmentSoFar);
uint sizeAsBaseType = curOffset;
if (curOffset == 0)
{
curOffset = 1; // As with C++, zero-length struct not allowed (except as parent of another struct).
}
IField[] totalFields;
if (parentLayout != null)
{
totalFields = parentLayout.Fields.Concat(tFields).ToArray();
}
else
{
totalFields = tFields;
}
TLayout layout = new TLayout(tStructType, curOffset, biggestAlignmentSoFar, sizeAsBaseType, totalFields);
foreach (TField field in tFields)
{
field.DeclaringLayout = layout;
}
return(layout);
}
/// <summary>
/// Adds support for parsing types derived from _requiredBaseType_ by using reflection to interpret their fields.
/// All field types used within these types must also have layouts available from the LayoutManager.
/// </summary>
/// <param name="layouts"></param>
/// <param name="enabledDefines">
/// The set of defines that can be used to enabled optional fields decorated with the IfAttribute
/// </param>
/// <param name="requiredBaseType"></param>
/// <returns></returns>
public static LayoutManager AddReflectionTypes(this LayoutManager layouts, IEnumerable <string> enabledDefines, Type requiredBaseType)
{
layouts.AddLayoutProvider((type, layoutManager) => GetTStructLayout(type, layoutManager, enabledDefines, requiredBaseType));
return(layouts);
}
/// <summary>
/// Adds support for parsing types derived from TStruct. All the field types used within the TStruct types
/// must also have layouts available from the LayoutManager.
/// </summary>
/// <param name="layouts">The layout manager that will hold the new layout</param>
/// <param name="enabledDefines">
/// The set of defines that can be used to enabled optional fields decorated with the IfAttribute
/// </param>
public static LayoutManager AddTStructTypes(this LayoutManager layouts, IEnumerable <string> enabledDefines)
{
return(AddReflectionTypes(layouts, enabledDefines, typeof(TStruct)));
}
/// <summary>
/// Adds support for parsing types derived from TStruct. All the field types used within the TStruct types
/// must also have layouts available from the LayoutManager.
/// </summary>
public static LayoutManager AddTStructTypes(this LayoutManager layouts)
{
return(AddTStructTypes(layouts, null));
}
/// <summary>
/// Adds support for reading types derived from Pointer<,>
/// </summary>
public static LayoutManager AddPointerTypes(this LayoutManager layouts)
{
layouts.AddLayoutProvider(GetPointerLayout);
return(layouts);
}
