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# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
# GDB pretty printers for Boost.Pointer Container.
#
# Copyright (C) 2012 Red Hat, Inc., David Tardon <dtardon@redhat.com>
#
# This file is part of boost-gdb-printers.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import gdb
import six
from boost.lib.unordered import Map, Set
import boost.util.printing as printing
std = None
class PtrStdPrinterBase(object):
def __init__(self, typename, value, seq_tag):
self._import_std()
self.typename = typename
self.value = value
# (try to) init printer of underlying std sequence and get elements
printer = self._get_sequence_printer(seq_tag)
if printer:
seq = value['c_']
if str(seq.type.strip_typedefs()).startswith('std::__debug::'):
seq_typename = 'std::__debug::%s' % seq_tag
else:
seq_typename = 'std::%s' % seq_tag
self.sequence = list(printer(seq_typename, seq).children())
else:
self.sequence = None
def to_string(self):
if self.sequence != None:
length = len(self.sequence)
if length:
return "%s %s" % (self.typename, self.print_size(length))
else:
return "empty %s" % self.typename
else:
return "opaque %s" % self.typename
def children(self):
return self._iterator(self.sequence, self.value.type.template_argument(0))
class _iterator(six.Iterator):
def __init__(self, sequence, type):
self.impl = iter(sequence)
self.type = type.pointer()
def __iter__(self):
return self
def __next__(self):
(index, value) = six.advance_iterator(self.impl)
return (index, value.cast(self.type).dereference())
def _import_std(self):
global std
if not std:
try:
import libstdcxx.v6.printers
std = libstdcxx.v6.printers
except:
pass
def _get_sequence_printer(self, typename):
if typename == "deque":
return std.StdDequePrinter
if typename == "list":
return std.StdListPrinter
if typename == "map":
return std.StdMapPrinter
if typename == "set":
return std.StdSetPrinter
if typename == "vector":
return std.StdVectorPrinter
class PtrSequencePrinter(PtrStdPrinterBase):
def __init__(self, typename, value, seq_tag):
super(PtrSequencePrinter, self).__init__(typename, value, seq_tag)
def print_size(self, size):
return "of length %s" % size
def display_hint(self):
return 'array'
class PtrSetPrinter(PtrStdPrinterBase):
def __init__(self, typename, value):
super(PtrSetPrinter, self).__init__(typename, value, 'set')
def print_size(self, size):
return "with %s elements" % size
def display_hint(self):
return 'array'
class PtrMapPrinter(PtrStdPrinterBase):
def __init__(self, typename, value):
super(PtrMapPrinter, self).__init__(typename, value, 'map')
def children(self):
type = self.value.type
return self._iterator(self.sequence, type.template_argument(0), type.template_argument(1))
class _iterator(six.Iterator):
def __init__(self, sequence, key_type, value_type):
self.impl = iter(sequence)
self.key_type = key_type
self.value_type = value_type.pointer()
self.key = True
def __iter__(self):
return self
def __next__(self):
(index, value) = six.advance_iterator(self.impl)
if self.key:
value = value.cast(self.key_type)
else:
value = value.cast(self.value_type).dereference()
self.key = not self.key
return (index, value)
def display_hint(self):
return 'map'
def print_size(self, size):
return "with %s elements" % (size / 2)
class PtrBoostPrinterBase(object):
def __init__(self, typename, value, container, iterator, value_type):
self.typename = typename
self.impl = container(value['c_'])
self.iterator = iterator
self.value_type = value_type.pointer()
def to_string(self):
if self.impl.empty():
return "empty " + self.typename
else:
return "%s with %s elements" % (self.typename, len(self.impl))
def children(self):
return self.iterator(iter(self.impl), self.value_type)
class PtrUnorderedMapPrinter(PtrBoostPrinterBase):
def __init__(self, typename, value):
super(PtrUnorderedMapPrinter, self).__init__(typename, value, Map, self._iterator,
value.type.template_argument(1))
def display_hint(self):
return 'map'
class _iterator(six.Iterator):
def __init__(self, impl, value_type):
self.impl = impl
self.step = True
self.value = None
self.value_type = value_type
def __iter__(self):
return self
def __next__(self):
if self.step:
self.value = six.advance_iterator(self.impl)
value = self.value[0]
else:
value = self.value[1].cast(self.value_type).dereference()
self.step = not self.step
return ("", value)
class PtrUnorderedSetPrinter(PtrBoostPrinterBase):
def __init__(self, typename, value):
super(PtrUnorderedSetPrinter, self).__init__(typename, value, Set, self._iterator,
value.type.template_argument(0))
def display_hint(self):
return 'array'
class _iterator(six.Iterator):
def __init__(self, impl, value_type):
self.impl = impl
self.value_type = value_type
def __iter__(self):
return self
def __next__(self):
return ("", six.advance_iterator(self.impl)[1].cast(self.value_type).dereference())
printer = None
def build_pretty_printers():
global printer
if printer != None:
return
printer = printing.Printer("boost.ptr_container")
printer.add('boost::ptr_deque', (lambda t, v: PtrSequencePrinter(t, v, "deque")))
printer.add('boost::ptr_list', (lambda t, v: PtrSequencePrinter(t, v, "list")))
printer.add('boost::ptr_map', PtrMapPrinter)
printer.add('boost::ptr_multimap', PtrMapPrinter)
printer.add('boost::ptr_multiset', PtrSetPrinter)
printer.add('boost::ptr_set', PtrSetPrinter)
printer.add('boost::ptr_unordered_map', PtrUnorderedMapPrinter)
printer.add('boost::ptr_unordered_multimap', PtrUnorderedMapPrinter)
printer.add('boost::ptr_unordered_multiset', PtrUnorderedSetPrinter)
printer.add('boost::ptr_unordered_set', PtrUnorderedSetPrinter)
printer.add('boost::ptr_vector', (lambda t, v: PtrSequencePrinter(t, v, "vector")))
def register_pretty_printers(obj):
printing.register_pretty_printer(printer, obj)
build_pretty_printers()
# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
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