Naive implementation of file stream and Lark based IFC-SPF reader to handle huge IFCs.

src/ifcopenshell-python/ifcopenshell/__init__.py

@@ -72,6 +72,7 @@ from . import guid
 from .file import file
 from .entity_instance import entity_instance, register_schema_attributes
 from .sql import sqlite, sqlite_entity
+from .stream import stream, stream_entity
 
 READ_ERROR = ifcopenshell_wrapper.file_open_status.READ_ERROR
 NO_HEADER = ifcopenshell_wrapper.file_open_status.NO_HEADER
@@ -88,7 +89,7 @@ class SchemaError(Error):
     pass
 
 
-def open(path: "os.PathLike | str", format: str = None) -> file:
+def open(path: "os.PathLike | str", format: str = None, should_stream: bool = False) -> file:
     """Loads an IFC dataset from a filepath
 
     You can specify a file format. If no format is given, it is guessed from its extension.
@@ -117,6 +118,8 @@ def open(path: "os.PathLike | str", format: str = None) -> file:
                     raise LookupError(f"No .ifc or .ifcXML file found in {path}")
     if format == ".ifcSQLite":
         return sqlite(path)
+    if should_stream:
+        return stream(path)
     f = ifcopenshell_wrapper.open(str(path.absolute()))
     if f.good():
         return file(f)