chore(API): Infrastructure to use endpoints with fd. passing

util/src/controlflow.rs

@@ -0,0 +1,50 @@
+#[macro_export]
+macro_rules! repeat {
+    ($times:expr, $body:expr) => {
+        for _ in 0..($times) {
+            $body
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! return_if {
+    ($cond:expr) => {
+        if $cond {
+            return;
+        }
+    };
+    ($cond:expr, $val:expr) => {
+        if $cond {
+            return $val;
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! break_if {
+    ($cond:expr) => {
+        if $cond {
+            break;
+        }
+    };
+    ($cond:expr, $val:expr) => {
+        if $cond {
+            break $val;
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! continue_if {
+    ($cond:expr) => {
+        if $cond {
+            continue;
+        }
+    };
+    ($cond:expr, $val:expr) => {
+        if $cond {
+            break $val;
+        }
+    };
+}