solenv/gdb/boost/smart_ptr.py

   1 # -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
   2 # GDB pretty printers for Boost.Smart Ptr.
   3 #
   4 # Copyright (C) 2012 Red Hat, Inc., David Tardon <dtardon@redhat.com>
   5 #
   6 # This file is part of boost-gdb-printers.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 import gdb
  22
  23 import boost.util.printing as printing
  24
  25
  26 class SmartPtrPrinter:
  27     """Prints smart pointers based on Boost.SmartPtr"""
  28
  29     def __init__(self, typename, value):
  30         self.typename = typename
  31         self.value = value
  32
  33     def to_string(self):
  34         if self.value['px']:
  35             print_object = gdb.parameter('print object')
  36             value = self.value['px'].dereference()
  37             if print_object:
  38                 dynamic_type = self.value['px'].dynamic_type
  39                 value = self.value['px'].cast(dynamic_type).dereference()
  40             return "%s %s" % (self.typename, value)
  41         else:
  42             return "empty %s" % (self.typename)
  43
  44 class WeakPtrPrinter:
  45     """Prints boost::weak_ptr instances"""
  46
  47     def __init__(self, typename, value):
  48         self.typename = typename
  49         self.value = value
  50
  51     def to_string(self):
  52         value = self.value['px']
  53         return "%s %s" % (self.typename, value)
  54
  55 printer = None
  56
  57 def build_pretty_printers():
  58     global printer
  59
  60     if printer != None:
  61         return
  62
  63     printer = printing.Printer("boost.smart_ptr")
  64
  65     printer.add('boost::shared_ptr', SmartPtrPrinter)
  66     # printer.add('boost::shared_array', SmartPtrPrinter)
  67     printer.add('boost::weak_ptr', WeakPtrPrinter)
  68     printer.add('boost::scoped_ptr', SmartPtrPrinter)
  69     # printer.add('boost::scoped_array', SmartPtrPrinter)
  70
  71 def register_pretty_printers(obj):
  72     printing.register_pretty_printer(printer, obj)
  73
  74 build_pretty_printers()
  75
  76 # vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab: