public StructureType MergeStructureFields(StructureType str)
{
if (!HasCoincidentFields(str))
{
return(str);
}
StructureType strNew = new StructureType(str.Name, str.Size);
strNew.IsSegment = str.IsSegment;
UnionType ut = new UnionType(null, null);
int offset = 0;
string? name = null;
foreach (StructureField f in str.Fields)
{
//$REVIEW: what if multiple fields have differing names?
if (ut.Alternatives.Count == 0)
{
offset = f.Offset;
name = f.IsNameSet ? f.Name : null;
ut.Alternatives.Add(f.DataType);
}
else
{
if (f.Offset == offset)
{
if (f.DataType is UnionType uf)
{
ut = unifier.UnifyUnions(ut, uf);
}
else
{
unifier.UnifyIntoUnion(ut, f.DataType);
}
}
else
{
strNew.Fields.Add(offset, ut.Simplify(), name);
offset = f.Offset;
name = f.IsNameSet ? f.Name : null;
ut = new UnionType(null, null);
ut.Alternatives.Add(f.DataType);
}
}
}
if (ut.Alternatives.Count > 0)
{
strNew.Fields.Add(offset, ut.Simplify(), name);
}
var sfm = new StructureFieldMerger(strNew);
strNew = sfm.Merge();
return(strNew);
}
public void Setup()
{
factory = new TypeFactory();
sfm = new StructureFieldMerger();
}
