137 lines
3.6 KiB
Python
137 lines
3.6 KiB
Python
# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
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# Printer interface adaptor.
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#
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# Copyright (C) 2012 Red Hat, Inc., David Tardon <dtardon@redhat.com>
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#
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# This file is part of boost-gdb-printers.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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try:
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from collections.abc import Mapping
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except Exception:
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from collections import Mapping
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import gdb
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import re
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import six
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from boost.util.compatibility import use_gdb_printing
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class SimplePrinter(object):
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def __init__(self, name, function):
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self.name = name
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self.function = function
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self.enabled = True
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def invoke(self, val):
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if not self.enabled:
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return None
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return self.function(self.name, val)
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class NameLookup(Mapping):
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def __init__(self):
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self.map = {}
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self.name_regex = re.compile(r'^([\w:]+)(<.*>)?')
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def add(self, name, printer):
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self.map[name] = printer
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def __len__(self):
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return len(self.map)
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def __getitem__(self, type):
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typename = self._basic_type(type)
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if typename and typename in self.map:
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return self.map[typename]
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return None
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def __iter__(self):
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return self.map
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def _basic_type(self, type):
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basic_type = self.basic_type(type)
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if basic_type:
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match = self.name_regex.match(basic_type)
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if match:
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return match.group(1)
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return None
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@staticmethod
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def basic_type(type):
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if type.code == gdb.TYPE_CODE_REF:
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type = type.target()
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type = type.unqualified().strip_typedefs()
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return type.tag
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class FunctionLookup(Mapping):
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def __init__(self):
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self.map = {}
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def add(self, test, printer):
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self.map[test] = printer
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def __len__(self):
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return len(self.map)
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def __getitem__(self, type):
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for (test, printer) in six.iteritems(self.map):
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if test(type):
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return printer
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return None
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def __iter__(self):
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return self.map
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class Printer(object):
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def __init__(self, name):
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self.name = name
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self.subprinters = []
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self.name_lookup = NameLookup()
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self.func_lookup = FunctionLookup()
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self.enabled = True
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def add(self, name, function, lookup = None):
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printer = SimplePrinter(name, function)
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self.subprinters.append(printer)
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if not lookup:
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self.name_lookup.add(name, printer)
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else:
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self.func_lookup.add(lookup, printer)
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def __call__(self, val):
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printer = self.name_lookup[val.type]
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if not printer:
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printer = self.func_lookup[val.type]
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if printer:
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return printer.invoke(val)
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return None
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def register_pretty_printer(printer, obj):
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'''Registers printer with objfile'''
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if use_gdb_printing:
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gdb.printing.register_pretty_printer(obj, printer)
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else:
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if obj is None:
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obj = gdb
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obj.pretty_printers.append(printer)
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# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
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