From 8fe3310ff393f67753e14c4744266a33f2d727db Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Fri, 30 Sep 2022 10:44:59 +1000
Subject: [PATCH] AP_HAL: added id_signed for CANFrame

makes for more efficient lua processing
---
 libraries/AP_HAL/CANIface.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libraries/AP_HAL/CANIface.h b/libraries/AP_HAL/CANIface.h
index 5319708a91..30a5564e3e 100644
--- a/libraries/AP_HAL/CANIface.h
+++ b/libraries/AP_HAL/CANIface.h
@@ -67,6 +67,11 @@ struct AP_HAL::CANFrame {
         return (id == rhs.id) && (dlc == rhs.dlc) && (memcmp(data, rhs.data, dlc) == 0);
     }
 
+    // signed version of id, for use by scriping where uint32_t is expensive
+    int32_t id_signed(void) const {
+        return isExtended()? int32_t(id & MaskExtID) : int32_t(id & MaskStdID);
+    }
+
     bool isExtended()                  const
     {
         return id & FlagEFF;