Unified code for finding source code location

It is already used in 3 places so I put it into a function

src/bitmessageqt/__init__.py

@@ -67,13 +67,7 @@ def _translate(context, text):
 def change_translation(locale):
     global qtranslator
     qtranslator = QtCore.QTranslator()
-    if shared.frozen == "macosx_app":
-        translationpath = os.environ.get("RESOURCEPATH")
-    elif shared.frozen: # windows
-        translationpath = sys._MEIPASS
-    else:
-        translationpath = os.path.dirname(os.path.dirname(__file__))
-    translationpath = os.path.join (translationpath, 'translations', 'bitmessage_' + locale)
+    translationpath = os.path.join (shared.codePath(), 'translations', 'bitmessage_' + locale)
     qtranslator.load(translationpath)
     QtGui.QApplication.installTranslator(qtranslator)
 

src/proofofwork.py

@@ -4,18 +4,12 @@
 import hashlib
 from struct import unpack, pack
 import sys
-from shared import config, frozen
+from shared import config, frozen, codePath
 import shared
 import openclpow
 import os
 import ctypes
 
-if frozen == "macosx_app":
-    curdir = os.environ.get("RESOURCEPATH")
-elif frozen: # windows
-    curdir = sys._MEIPASS
-else:    
-    curdir = os.path.dirname(__file__)
 bitmsglib = 'bitmsghash.so'
 if "win32" == sys.platform:
     if ctypes.sizeof(ctypes.c_voidp) == 4:
@@ -23,12 +17,12 @@ if "win32" == sys.platform:
     else:
         bitmsglib = 'bitmsghash64.dll'
     try:
-        bso = ctypes.WinDLL(os.path.join(curdir, "bitmsghash", bitmsglib))
+        bso = ctypes.WinDLL(os.path.join(codePath(), "bitmsghash", bitmsglib))
     except:
         bso = None
 else:
     try:
-        bso = ctypes.CDLL(os.path.join(curdir, "bitmsghash", bitmsglib))
+        bso = ctypes.CDLL(os.path.join(codePath(), "bitmsghash", bitmsglib))
     except:
         bso = None
 if bso:

src/shared.py

@@ -217,6 +217,15 @@ def lookupAppdataFolder():
             pass
         dataFolder = dataFolder + '/'
     return dataFolder
+    
+def codePath():
+    if frozen == "macosx_app":
+        codePath = os.environ.get("RESOURCEPATH")
+    elif frozen: # windows
+        codePath = sys._MEIPASS
+    else:    
+        codePath = os.path.dirname(__file__)
+    return codePath
 
 def isAddressInMyAddressBook(address):
     queryreturn = sqlQuery(