load_roblox module

src/lib.rs

@@ -2,3 +2,4 @@ pub mod framework;
 pub mod body;
 pub mod zeroes;
 pub mod instruction;
+pub mod load_roblox;

src/load_roblox.rs

@@ -0,0 +1,28 @@
+fn class_is_a(class: &str, superclass: &str) -> bool {
+	if class==superclass {
+		return true
+	}
+	let class_descriptor=rbx_reflection_database::get().classes.get(class);
+	if let Some(descriptor) = &class_descriptor {
+		if let Some(class_super) = &descriptor.superclass {
+			return class_is_a(&class_super, superclass)
+		}
+	}
+	return false
+}
+
+pub fn get_objects(buf_thing: std::io::BufReader<&[u8]>, superclass: &str) -> Result<std::vec::Vec<rbx_dom_weak::Instance>, Box<dyn std::error::Error>> {
+	// Using buffered I/O is recommended with rbx_binary
+	let dom = rbx_binary::from_reader(buf_thing)?;
+
+	let mut objects = std::vec::Vec::<rbx_dom_weak::Instance>::new();
+	//move matching instances into objects
+	let (_,mut instances) = dom.into_raw();
+	for (_,instance) in instances.drain() {
+		if class_is_a(instance.class.as_str(), superclass) {
+			objects.push(instance);
+		}
+	}
+
+	return Ok(objects)
+}