Pass around non-static logger instances and programmatic access to messages in-memory

src/ifcwrap/utils/type_conversion.i

@@ -169,6 +169,7 @@
 	PyObject* pythonize(const IfcParse::inverse_attribute* t) { return SWIG_NewPointerObj(SWIG_as_voidptr(t), SWIGTYPE_p_IfcParse__inverse_attribute, 0); }
 	PyObject* pythonize(const IfcParse::entity* t)      { return SWIG_NewPointerObj(SWIG_as_voidptr(t), SWIGTYPE_p_IfcParse__entity, 0);             }
 	PyObject* pythonize(const IfcParse::declaration* t) { return SWIG_NewPointerObj(SWIG_as_voidptr(t), declaration_type_to_swig(t), 0);             }
+	PyObject* pythonize(const log_message& t)           { return SWIG_NewPointerObj(SWIG_as_voidptr(&t), SWIGTYPE_p_log_message, 0);                  }
 	// @nb ownership
 	PyObject* pythonize(const IfcGeom::ConversionResultShape* t) { return SWIG_NewPointerObj(SWIG_as_voidptr(t), SWIGTYPE_p_IfcGeom__ConversionResultShape, SWIG_POINTER_OWN); }
 	// PyObject* pythonize(const IfcGeom::ConversionResultShape* t) { return SWIG_NewPointerObj(SWIG_as_voidptr(t), SWIGTYPE_p_IfcGeom__ConversionResultShape, 0); }

src/ifcwrap/utils/typemaps_in.i

@@ -406,3 +406,21 @@ CREATE_OPTIONAL_TYPEMAP_IN(std::string, string, str)
 
 CREATE_SET_TYPEMAP_IN(int)
 CREATE_SET_TYPEMAP_IN(std::string)
+
+// for the logger codes
+%typemap(typecheck, precedence=SWIG_TYPECHECK_STRING) SWIGTYPE &code_prefix {
+    $1 = PyUnicode_Check($input);
+}
+%typemap(in) SWIGTYPE &code_prefix (char tmp[4]) {
+    Py_ssize_t len = 0;
+    const char *s = PyUnicode_AsUTF8AndSize($input, &len);
+
+    if (!s || len != 3) {
+        SWIG_exception_fail(SWIG_ValueError, "Expected Python str of length 3");
+    }
+
+    memcpy(tmp, s, 3);
+    tmp[3] = '\0';
+
+    $1 = &tmp;
+}

src/ifcwrap/utils/typemaps_out.i

@@ -108,6 +108,7 @@ CREATE_VECTOR_TYPEMAP_OUT(IfcParse::inverse_attribute const *)
 CREATE_VECTOR_TYPEMAP_OUT(IfcParse::entity const *)
 CREATE_VECTOR_TYPEMAP_OUT(IfcParse::declaration const *)
 CREATE_VECTOR_TYPEMAP_OUT(IfcGeom::ConversionResultShape *)
+CREATE_VECTOR_TYPEMAP_OUT(log_message)
 
 %typemap(out) ifcopenshell::geometry::Settings::value_variant_t {
 	pythonizing_visitor vis;