another shrimple macro!

kernel/src/device_tree.rs

@@ -23,36 +23,26 @@ impl DeviceTree {
         let mut dt = Self {
             devices: HashMap::new(),
         };
-
+        device_tree!(dt, [
-        // Human input devices
+            "Mice",
-        {
+            "Keyboards",
-            dt.devices.insert("Mice".to_string(), Vec::new());
+            "Controllers",
-            dt.devices.insert("Keyboards".to_string(), Vec::new());
+            "Generic HIDs",
-            dt.devices.insert("Controllers".to_string(), Vec::new());
+            "Disk Drives",
-            // Human Input Devices that do not fit into other catagories go in this spot
+            "CD Drives",
-            dt.devices.insert("Generic HIDs".to_string(), Vec::new());
+            "Batteries",
-        }
+            "Monitors",
-
+            "GPUs",
-        {
+            "CPUs",
-            dt.devices.insert("Disk Drives".to_string(), Vec::new());
+            "USB",
-            dt.devices.insert("CD Drives".to_string(), Vec::new());
+            "Serial Ports",
-        }
+            "Cameras",
-
+            "Biometric Devices",
-        dt.devices.insert("Batteries".to_string(), Vec::new());
+        ]);
-        dt.devices.insert("Monitors".to_string(), Vec::new());
-        dt.devices.insert("GPUs".to_string(), Vec::new());
-        dt.devices.insert("CPUs".to_string(), Vec::new());
-
-        dt.devices.insert("USB".to_string(), Vec::new());
-        dt.devices.insert("Serial Ports".to_string(), Vec::new());
-        dt.devices.insert("Cameras".to_string(), Vec::new());
-        dt.devices
-            .insert("Biometric Devices".to_string(), Vec::new());
-
         dt
     }
 }
-use crate::utils::TAB;
+use crate::{utils::TAB, device_tree};
 use crate::tab;
 impl fmt::Display for DeviceTree {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

kernel/src/utils.rs

@@ -14,3 +14,15 @@ macro_rules! tab {
         TAB.repeat($num)
     }
 }
+
+// NOTE: this only reduces the code duplication in source code not in generated code!
+// Written by Yours Truly: Munir
+/// A simple macro to reduce code duplication when we insert device types into the device tree
+#[macro_export]
+macro_rules! device_tree {
+    ($devtree:expr, $dev_type_vec:expr) => {
+        for each_device_type in $dev_type_vec {
+            $devtree.devices.insert(each_device_type.to_string(), Vec::new());
+        }
+    };
+}