From f955b8c50f3dd432ca07870213232753ea9940cf Mon Sep 17 00:00:00 2001
From: Philippe Groarke <philippe.groarke@gmail.com>
Date: Sat, 14 Oct 2017 13:09:29 -0400
Subject: [PATCH] check.py : Add checks for inversion and range modifiers.

---
 .gitignore |  2 +-
 check.py   | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 9084a01..1f92034 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
-.bak.gamecontrollerdb.txt
+.bak.*.txt
 .DS_Store
 .work
\ No newline at end of file
diff --git a/check.py b/check.py
index 1a5c2fa..1d518da 100755
--- a/check.py
+++ b/check.py
@@ -60,7 +60,15 @@ def check_mapping (mappingstring):
         else:
             if not value:
                 continue
-            if not value[0] in ['a', 'h', 'b']:
+            if value[0] in ['-', '+', '~']:
+                if not value[1] == 'a':
+                    error ("Invalid value \"" + value + "\" for key \"" + key +
+                           "\". Inversion and range modifiers only valid for " +
+                                   "axis (a).")
+                if not value[2:].isnumeric():
+                    error ("Invalid value \"" + value + "\" for key \"" + key +
+                           "\". Should be followed by a number after 'a'")
+            elif not value[0] in ['a', 'h', 'b']:
                 error ("Invalid value \"" + value + "\" for key \"" + key +
                        "\". Should start with a, b, or h")
             elif value[0] in ['a', 'b']: