From fafd8434acc60353d0fa2ca192ed85d44747e079 Mon Sep 17 00:00:00 2001
From: Miragecore <MirageKimYs@Gmail.com>
Date: Sun, 12 Jun 2022 15:38:32 +0900
Subject: [PATCH] add getformat (#3774)

---
 vm/src/builtins/float.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/vm/src/builtins/float.rs b/vm/src/builtins/float.rs
index d83439b5e..1aefdf937 100644
--- a/vm/src/builtins/float.rs
+++ b/vm/src/builtins/float.rs
@@ -204,6 +204,24 @@ impl PyFloat {
         }
     }
 
+    #[pymethod(magic)]
+    fn getformat(&self, spec: PyStrRef, vm: &VirtualMachine) -> PyResult<String> {
+        if !matches!(spec.as_str(), "double" | "float") {
+            return Err(vm.new_value_error(
+                "__getformat__() argument 1 must be 'double' or 'float'".to_owned(),
+            ));
+        }
+
+        const BIG_ENDIAN: bool = cfg!(target_endian = "big");
+
+        Ok(if BIG_ENDIAN {
+            "IEEE, big-endian"
+        } else {
+            "IEEE, little-endian"
+        }
+        .to_owned())
+    }
+
     #[pymethod(magic)]
     fn abs(&self) -> f64 {
         self.value.abs()