Quieter helpers initialisation, isderived() alternative to isinstance().

* New: In CRL.python.helpers, all methods make use of the quiet mode to
    allow completly silent initialisation.
      Introduce isderived() function to check the derivation relationship
    of two C++ encapsulated classes by Isobar. The Python isinstance do
    not work, all C++ wrapped classes are of the base type 'type'.
    isderived() uses the MRO mechanism (Method Resolution Order) as a
    workaround. I can't find in the documentation if it's the expected
    behavior or if i did miss something in when building my classes.

crlcore/python/helpers/__init__.py

@@ -25,6 +25,7 @@ import re
 import traceback
 import Hurricane
 
+quiet          = False
 sysConfDir     = None
 ndaConfDir     = None
 symbolicTechno = 'cmos'
@@ -39,6 +40,13 @@ moduleGlobals  = globals()
 def stype ( o ): return str(type(o)).split("'")[1]
 
 
+def isderived ( derived, base ):
+    btype = base.mro()[0]
+    for dtype in derived.mro():
+      if dtype == btype: return True
+    return False
+
+
 def truncPath ( path ):
   if len(path) < 70: return path
   return '.../'+os.sep.join(path.split(os.sep)[-4:])
@@ -246,13 +254,16 @@ def setTraceLevel ( level ):
   return
 
 
-def initTechno ( quiet ):
+def initTechno ( argQuiet ):
+  global quiet
   global ndaConfDir
   global realDir
   global realTechno
   global symbolicDir
   global symbolicTechno
 
+  quiet = argQuiet
+
   technoFiles  = [ sysConfDir+'/techno.conf' ]
   if os.getenv('HOME'):
     technoFiles += [ os.getenv('HOME')+'/.coriolis2/techno.py' ]

unicorn/src/cgt.py

@@ -80,8 +80,10 @@ def runScript ( scriptPath, editor ):
 
   except ImportError, e:
       module = str(e).split()[-1]
-      print '[ERROR] The <%s> script cannot be loaded.' % module
-      print '        Please check your design hierarchy.'
+      print '[ERROR] The <%s> script cannot be loaded.' % os.path.basename(scriptPath)
+      print '        Please check your design hierarchy or the Python syntax.'
+      print '        Error was:'
+      print '          %s\n' % e
   except Exception, e:
       print '[ERROR] An exception occured while loading the Stratus script module:'
       print '        <%s>\n' % (scriptPath)