gdb/testsuite/gdb.python/py-format-string.py

   1 # Copyright (C) 2008-2020 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file is part of the GDB testsuite.  It tests python pretty
  17 # printers.
  18
  19 import gdb
  20
  21 class PointPrinter (object):
  22     def __init__ (self, val):
  23         self.val = val
  24
  25     def to_string (self):
  26         return 'Pretty Point (%s, %s)' % (self.val['x'], self.val['y'])
  27
  28 def test_lookup_function (val):
  29     "Look-up and return a pretty-printer that can print val."
  30
  31     # Get the type.
  32     type = val.type
  33
  34     # If it points to a reference, get the reference.
  35     if type.code == gdb.TYPE_CODE_REF:
  36         type = type.target ()
  37
  38     # Get the unqualified type, stripped of typedefs.
  39     type = type.unqualified ().strip_typedefs ()
  40
  41     # Get the type name.
  42     typename = type.tag
  43
  44     if typename == 'point':
  45         return PointPrinter (val)
  46
  47     return None
  48
  49 gdb.pretty_printers.append (test_lookup_function)