File indexing completed on 2024-05-12 04:39:56

 # -*- coding: utf-8 -*-
 # Helper module for pretty-printers
 
 # SPDX-FileCopyrightText: 2013 Kevin Funk <kfunk@kde.org>
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 import sys
 
 # BEGIN: Utilities for wrapping differences of Python 2.x and Python 3
 # Inspired by http://pythonhosted.org/six/
 
 # Useful for very coarse version differentiation.
 PY2 = sys.version_info[0] == 2
 PY3 = sys.version_info[0] == 3
 
 # create Python 2.x & 3.x compatible iterator base
 if PY3:
     Iterator = object
 else:
     class Iterator(object):
 
         def next(self):
             return type(self).__next__(self)
 if PY3:
     unichr = chr
 else:
     unichr = unichr
 
 # END
 
 # BEGIN: Helper functions for pretty-printers
 
 def has_field(val, name):
     """Check whether @p val (gdb.Value) has a field named @p name"""
     try:
         val[name]
         return True
     except Exception:
         return False
 
 def default_iterator(val):
     for field in val.type.fields():
         yield field.name, val[field.name]
 
 class FunctionLookup:
 
     def __init__(self, gdb, pretty_printers_dict):
         self.gdb = gdb
         self.pretty_printers_dict = pretty_printers_dict
 
     def __call__(self, val):
         "Look-up and return a pretty-printer that can print val."
 
         # Get the type.
         type = val.type;
 
         # If it points to a reference, get the reference.
         if type.code == self.gdb.TYPE_CODE_REF:
             type = type.target ()
 
         # Get the unqualified type, stripped of typedefs.
         type = type.unqualified ().strip_typedefs ()
 
         # Get the type name.
         typename = type.tag
         if typename == None:
             return None
 
         # Iterate over local dictionary of types to determine
         # if a printer is registered for that type.  Return an
         # instantiation of the printer if found.
         for function in self.pretty_printers_dict:
             if function.search (typename):
                 return self.pretty_printers_dict[function](val)
 
         # Cannot find a pretty printer.  Return None.
         return None
 
 # END