Method step_callback

crates/stdlib/src/_sqlite3.rs:474–498

(
            context: *mut sqlite3_context,
            argc: c_int,
            argv: *mut *mut sqlite3_value,
        )

        }

        unsafe extern "C" fn step_callback(
            context: *mut sqlite3_context,
            argc: c_int,
            argv: *mut *mut sqlite3_value,
        ) {
            let context = SqliteContext::from(context);
            let (cls, vm) = unsafe { (*context.user_data::<Self>()).retrieve() };
            let args = unsafe { core::slice::from_raw_parts(argv, argc as usize) };
            let instance = context.aggregate_context::<*const PyObject>();
            if unsafe { (*instance).is_null() } {
                match cls.call((), vm) {
                    Ok(obj) => unsafe { *instance = obj.into_raw().as_ptr() },
                    Err(exc) => {
                        return context.result_exception(
                            vm,
                            exc,
                            "user-defined aggregate's '__init__' method raised error\0",
                        );
                    }
                }
            }
            let instance = unsafe { &**instance };

            Self::call_method_with_args(context, instance, "step", args, vm);
        }

        unsafe extern "C" fn finalize_callback(context: *mut sqlite3_context) {
            let context = SqliteContext::from(context);