/// <summary>
/// AppendStructParameters - Helper routine to append parameters to a param list.
/// </summary>
internal static int AppendStructParameters(
DelimitedList parameterList,
PaddedStructData paddedFields,
int initialPosition,
bool unmanagedStruct)
{
return(AppendStructParameters(
parameterList,
paddedFields,
initialPosition,
unmanagedStruct,
false
));
}
internal static int AppendStructParameters(
DelimitedList parameterList,
PaddedStructData paddedFields,
int initialPosition,
bool unmanagedStruct,
bool kernelAccessibleStruct
)
{
int padSuffix = 0;
Helpers.CodeGenHelpers.AlignedFieldOffsetHelper alignedFieldHelper = new Helpers.CodeGenHelpers.AlignedFieldOffsetHelper(4, 4);
foreach (AlignmentEntry alignmentEntry in paddedFields.AlignmentEntries)
{
McgField field = alignmentEntry.Field;
int position = initialPosition + alignmentEntry.Offset;
alignedFieldHelper.MoveToNextEntry(position, alignmentEntry.Size);
int alignedFieldOffset = alignedFieldHelper.AlignedFieldOffset;
if (unmanagedStruct)
{
// Insert enough padding to ensure the field is properly aligned
foreach (string alignmentField in alignedFieldHelper.AlignmentFields)
{
parameterList.Append(alignmentField);
}
}
// This primary if else else block switches between the tree types of entries in the
// paddedFields alignment list: padding, animation and normal field entries.
// The offset of each field is stored in "position", which is the padding offset of the
// entry + the initial position.
if (field == null)
{
Debug.Assert(alignmentEntry.IsPad);
string padIdentifier = "padQuadAlignment" + padSuffix;
if (unmanagedStruct)
{
parameterList.Append("UINT32 " + padIdentifier + ";");
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] private UInt32 " + padIdentifier);
}
++padSuffix;
}
else if (alignmentEntry.IsAnimation)
{
if (unmanagedStruct)
{
parameterList.Append("HMIL_RESOURCE " + "h" + field.PropertyName + "Animations;");
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] internal DUCE.ResourceHandle h" + field.PropertyName + "Animations");
}
}
else
{
// This case is a boring, non animate field.
bool constructedParam = false;
McgType type = field.Type;
McgResource resourceType = type as McgResource;
// If it's an McgResource, we have to handle reference types and collections
if (resourceType != null)
{
// Currently, collections are accounted for by storing just their size inline
if (resourceType.IsCollection)
{
if (unmanagedStruct)
{
parameterList.Append("UINT32 " + field.Name + "Size;");
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] internal UInt32 " + field.Name + "Size");
}
constructedParam = true;
}
// If it's not a collection, is it a reference type? If so, it's passed by handle.
else if (!resourceType.IsValueType)
{
if (unmanagedStruct)
{
parameterList.Append("HMIL_RESOURCE " + "h" + field.Name + ";");
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] internal DUCE.ResourceHandle h" + field.Name);
}
constructedParam = true;
}
}
// If we haven't yet handled this parameter, we're left with a primitive type,
// like a struct or an enum. At this point, the value will be stored inline.
// The only real question left is whether the unmanaged struct matches the managed struct.
// If so, the struct is simply stored. If not, then .NeedsConvert is true, and
// the record is of the unmanaged type, even on the managed side of things.
if (!constructedParam)
{
if (type.NeedsConvert)
{
if (unmanagedStruct)
{
parameterList.Append(type.BaseUnmanagedType + " " + field.Name + ";");
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] internal " + type.MarshalUnmanagedType + " " + field.Name);
}
}
else
{
if (unmanagedStruct)
{
if (kernelAccessibleStruct)
{
McgEnum enumType = type as McgEnum;
if (enumType != null)
{
parameterList.Append(enumType.KernelAccessibleType + " " + field.Name + ";");
constructedParam = true;
}
}
if (!constructedParam)
{
parameterList.Append(type.BaseUnmanagedType + " " + field.Name + ";");
}
}
else
{
parameterList.Append("[FieldOffset(" + alignedFieldOffset + ")] internal " + type.ManagedName + " " + field.Name);
}
}
}
}
}
if (unmanagedStruct)
{
// Insert enough padding to ensure the struct's size falls on a packing boundary
foreach (string packingField in alignedFieldHelper.NativePackingFields)
{
parameterList.Append(packingField);
}
}
else
{
// Insert enough padding to ensure the struct's size falls on a packing boundary
foreach (string packingField in alignedFieldHelper.ManagedPackingFields)
{
parameterList.Append(packingField);
}
}
return(initialPosition + paddedFields.PaddedSize);
}
