Merge pull request #94 from meghprkh/master

Add check script and integrate Travis CI

.travis.yml

@@ -0,0 +1,3 @@
+language: python
+python: 3.5
+script: ./check.py gamecontrollerdb.txt

README.md

@@ -1,5 +1,6 @@
 ##SDL_GameControllerDB
 
+[![Build Status](https://travis-ci.org/meghprkh/SDL_GameControllerDB.svg?branch=master)](https://travis-ci.org/meghprkh/SDL_GameControllerDB)
 
 A community source database of game controller mappings to be used with SDL2 Game Controller functionality.
 
@@ -18,6 +19,13 @@ SDL2, or using Steam's Big Picture mode, configure your joystick and then
 look in config/config.vdf in your Steam installation directory for the 
 SDL_GamepadBind entry.
 
+####Checking your mappings:
+You need to have python3 installed. Run
+
+```
+python3 check.py gamecontrollerdb.txt
+```
+
 ####References:
 
 * [SDL2](http://www.libsdl.org)

check.py

@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+
+import fileinput
+import string
+import sys
+
+success = True
+
+def error (message):
+    global success;
+    success = False
+    print("Error at #" + str(fileinput.lineno()), ":", message)
+    print(line)
+
+def check_guid (guid):
+    if len (guid) != 32:
+        error ("The length of the guid string must be equal to 32")
+    for c in guid:
+        if not c in string.hexdigits:
+            error ("Each character in guid string must be a hex character " + string.hexdigits)
+
+def check_mapping (mappingstring):
+    keys = ["platform", "leftx", "lefty", "rightx", "righty", "a", "b", "back", "dpdown", \
+            "dpleft", "dpright", "dpup", "guide", "leftshoulder", "leftstick", \
+            "lefttrigger", "rightshoulder", "rightstick", "righttrigger", "start", "x", "y"]
+    platforms = ["Linux", "Mac OS X", "Windows"]
+    mappings = mappingstring.split (',')
+    for mapping in mappings:
+        if not mapping:
+            continue
+        if len (mapping.split(':')) != 2:
+            error ("Invalid mapping : " + mapping)
+            continue
+        key = mapping.split (':')[0]
+        value = mapping.split (':')[1]
+        if not key in keys:
+            error ("Invalid key \"" + key + "\" in mapping string")
+
+        # Check values
+        if key == "platform":
+            if value not in platforms:
+                error ("Invalid platform \"" + value + "\" in mapping string")
+        else:
+            if not value:
+                continue
+            if 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']:
+                if not value[1:].isnumeric():
+                    error ("Invalid value \"" + value + "\" for key \"" + key +
+                           "\". Should be followed by a number after 'a' or 'b'")
+            else:
+                dpad_positions = map(str, [0, 1, 2, 4, 8, 1|2, 2|4, 4|8, 8|1])
+                dpad_index = value[1:].split ('.')[0]
+                dpad_position = value[1:].split ('.')[1]
+                if not dpad_index.isnumeric():
+                    error ("Invalid value \"" + value + "\" for key \"" + key +
+                           "\". Dpad index \"" + dpad_index + "\" should be a number")
+                if not dpad_position in dpad_positions:
+                    error ("Invalid value \"" + value + "\" for key \"" + key +
+                           "\". Dpad position \"" + dpad_position + "\" should be one of" +
+                           ', '.join(dpad_positions))
+
+for line in fileinput.input():
+    if line.startswith('#') or line == '\n':
+        continue
+    splitted = line[:-1].split(',', 2)
+    if len(splitted) < 3 or not splitted[0] or not splitted[1] or not splitted[2]:
+        error ("Either GUID/Name/Mappingstring is missing or empty")
+    check_guid(splitted[0])
+    check_mapping(splitted[2])
+
+if not success:
+    sys.exit(1)