From 4d39f5e52e1ca9e26a397eb4bcc2fe7bad18cdfe Mon Sep 17 00:00:00 2001
From: deva <deva>
Date: Mon, 9 Jun 2008 07:05:06 +0000
Subject: Corrected the mapper to do proper error checking.
---
server/xml/macros/example.xml | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
(limited to 'server/xml/macros')
diff --git a/server/xml/macros/example.xml b/server/xml/macros/example.xml
index 635dea2..f875747 100644
--- a/server/xml/macros/example.xml
+++ b/server/xml/macros/example.xml
@@ -9,8 +9,23 @@
return math.pi, 1234567890
</map>
<map name="cyl">
- -- LUA program
- return lensmeter.right.cyl.value, lensmeter.right.cyl.timestamp
+ -- Returning 0, 0 invalidates the result
+ value = 0
+ timestamp = 0
+
+ -- Check for the existence of each level.
+ if( lensmeter and
+ lensmeter.right and
+ lensmeter.right.cyl and
+ lensmeter.right.cyl.value and
+ lensmeter.right.cyl.timestamp )
+ then
+ timestamp = lensmeter.right.cyl.value
+ value = lensmeter.right.cyl.value end
+ end
+ end
+
+ return value, timestamp
</map>
</maps>
<luaprograms>
--
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