10 files changed, 825 insertions, 0 deletions
diff --git a/solenv/gdb/boost/__init__.py b/solenv/gdb/boost/__init__.py
new file mode 100644
index 000000000..353ee3b09
--- /dev/null
+++ b/solenv/gdb/boost/__init__.py
@@ -0,0 +1,32 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# GDB pretty printers for Boost.
+#
+# 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 boost.optional
+import boost.ptr_container
+import boost.smart_ptr
+import boost.unordered
+
+def register_pretty_printers(obj):
+    boost.optional.register_pretty_printers(obj)
+    boost.ptr_container.register_pretty_printers(obj)
+    boost.smart_ptr.register_pretty_printers(obj)
+    boost.unordered.register_pretty_printers(obj)
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/lib/__init__.py b/solenv/gdb/boost/lib/__init__.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/solenv/gdb/boost/lib/__init__.py
diff --git a/solenv/gdb/boost/lib/unordered.py b/solenv/gdb/boost/lib/unordered.py
new file mode 100644
index 000000000..ee58d0481
--- /dev/null
+++ b/solenv/gdb/boost/lib/unordered.py
@@ -0,0 +1,129 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# Helper classes for working with Boost.Unordered.
+#
+# 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
+
+class Unordered(object):
+    '''Common representation of Boost.Unordered types'''
+
+    def __init__(self, value, extractor):
+        self.value = value
+        self.extractor = extractor
+        self.node_type = self._node_type()
+
+    def __len__(self):
+        table = self.value['table_']
+        if table['buckets_']:
+            return int(table['size_'])
+        else:
+            return 0
+
+    def __iter__(self):
+        table = self.value['table_']
+        buckets = table['buckets_']
+        if buckets:
+            first = table['cached_begin_bucket_']
+            last = buckets + table['bucket_count_']
+        else:
+            first = last = None
+        return self._iterator(first, last, self.node_type, self.extractor)
+
+    def empty(self):
+        return not self.value['table_']['buckets_']
+
+    def _node_type(self):
+        hash_table = self.value['table_'].type.fields()[0]
+        assert hash_table.is_base_class
+        hash_buckets = hash_table.type.fields()[0]
+        assert hash_buckets.is_base_class
+        node_type = gdb.lookup_type("%s::node" % hash_buckets.type)
+        assert node_type != None
+        return node_type
+
+    class _iterator(six.Iterator):
+        '''Iterator for Boost.Unordered types'''
+
+        def __init__(self, first_bucket, last_bucket, node_type, extractor):
+            self.bucket = first_bucket
+            self.last_bucket = last_bucket
+            self.node = self.bucket
+            self.node_type = node_type
+            self.value_type = self._value_type()
+            self.extractor = extractor
+
+        def __iter__(self):
+            return self
+
+        def __next__(self):
+            if self.node:
+                self.node = self.node.dereference()['next_']
+
+            # we finished the current bucket: go on to the next non-empty one
+            if not self.node:
+                while not self.node and self.bucket != self.last_bucket:
+                    self.bucket += 1
+                    self.node = self.bucket.dereference()['next_']
+
+            # sorry, no node available
+            if not self.node or self.node == self.bucket:
+                raise StopIteration()
+
+            mapped = self._value()
+            return (self.extractor.key(mapped), self.extractor.value(mapped))
+
+        def _value(self):
+            assert self.node != self.bucket # bucket node has no value
+            assert self.node != None
+            node = self.node.dereference().cast(self.node_type)
+            return node['data_'].cast(self.value_type)
+
+        def _value_type(self):
+            value_base = self.node_type.fields()[1]
+            assert value_base.is_base_class
+            return value_base.type.template_argument(0)
+
+class Map(Unordered):
+
+    def __init__(self, value):
+        super(Map, self).__init__(value, self._extractor())
+
+    class _extractor(object):
+
+        def key(self, node):
+            return node['first']
+
+        def value(self, node):
+            return node['second']
+
+class Set(Unordered):
+
+    def __init__(self, value):
+        super(Set, self).__init__(value, self._extractor())
+
+    class _extractor(object):
+
+        def key(self, node):
+            return None
+
+        def value(self, node):
+            return node
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/optional.py b/solenv/gdb/boost/optional.py
new file mode 100644
index 000000000..08297254e
--- /dev/null
+++ b/solenv/gdb/boost/optional.py
@@ -0,0 +1,56 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# GDB pretty printers for Boost.Optional.
+#
+# 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 boost.util.printing as printing
+
+class OptionalPrinter:
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+
+    def to_string(self):
+        if self.value['m_initialized']:
+            data = self.value['m_storage']['dummy_']['data']
+            ptr_type = self.value.type.template_argument(0).pointer()
+            return "%s %s" % (self.typename, data.cast(ptr_type).dereference())
+        else:
+            return "empty " + self.typename
+
+printer = None
+
+def build_pretty_printers():
+    global printer
+
+    if printer != None:
+        return
+
+    printer = printing.Printer("boost.optional")
+
+    printer.add('boost::optional', OptionalPrinter)
+
+def register_pretty_printers(obj):
+    printing.register_pretty_printer(printer, obj)
+
+build_pretty_printers()
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/ptr_container.py b/solenv/gdb/boost/ptr_container.py
new file mode 100644
index 000000000..425d812f5
--- /dev/null
+++ b/solenv/gdb/boost/ptr_container.py
@@ -0,0 +1,248 @@
+# -*- 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:
diff --git a/solenv/gdb/boost/smart_ptr.py b/solenv/gdb/boost/smart_ptr.py
new file mode 100644
index 000000000..60d88278a
--- /dev/null
+++ b/solenv/gdb/boost/smart_ptr.py
@@ -0,0 +1,76 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# GDB pretty printers for Boost.Smart Ptr.
+#
+# 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 boost.util.printing as printing
+
+
+class SmartPtrPrinter:
+    """Prints smart pointers based on Boost.SmartPtr"""
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+
+    def to_string(self):
+        if self.value['px']:
+            print_object = gdb.parameter('print object')
+            value = self.value['px'].dereference()
+            if print_object:
+                dynamic_type = self.value['px'].dynamic_type
+                value = self.value['px'].cast(dynamic_type).dereference()
+            return "%s %s" % (self.typename, value)
+        else:
+            return "empty %s" % (self.typename)
+
+class WeakPtrPrinter:
+    """Prints boost::weak_ptr instances"""
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+
+    def to_string(self):
+        value = self.value['px']
+        return "%s %s" % (self.typename, value)
+
+printer = None
+
+def build_pretty_printers():
+    global printer
+
+    if printer != None:
+        return
+
+    printer = printing.Printer("boost.smart_ptr")
+
+    printer.add('boost::shared_ptr', SmartPtrPrinter)
+    # printer.add('boost::shared_array', SmartPtrPrinter)
+    printer.add('boost::weak_ptr', WeakPtrPrinter)
+    printer.add('boost::scoped_ptr', SmartPtrPrinter)
+    # printer.add('boost::scoped_array', SmartPtrPrinter)
+
+def register_pretty_printers(obj):
+    printing.register_pretty_printer(printer, obj)
+
+build_pretty_printers()
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/unordered.py b/solenv/gdb/boost/unordered.py
new file mode 100644
index 000000000..2c5672185
--- /dev/null
+++ b/solenv/gdb/boost/unordered.py
@@ -0,0 +1,112 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# GDB pretty printers for Boost.Unordered.
+#
+# 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
+
+class PrinterBase(object):
+    '''Contains common functionality for printing Boost.Unordered types'''
+
+    def __init__(self, typename, value, container, iterator):
+        self.typename = typename
+        self.impl = container(value)
+        self.iterator = iterator
+
+    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))
+
+class UnorderedMapPrinter(PrinterBase):
+
+    def __init__(self, typename, value):
+        super(UnorderedMapPrinter, self).__init__(typename, value, Map, self._iterator)
+
+    def display_hint(self):
+        return 'map'
+
+    class _iterator(six.Iterator):
+
+        def __init__(self, impl):
+            self.impl = impl
+            self.value = None
+            self.step = True
+
+        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]
+            self.step = not self.step
+            return ("", value)
+
+class UnorderedSetPrinter(PrinterBase):
+
+    def __init__(self, typename, value):
+        super(UnorderedSetPrinter, self).__init__(typename, value, Set, self._iterator)
+
+    def display_hint(self):
+        return 'array'
+
+    class _iterator(six.Iterator):
+
+        def __init__(self, impl):
+            self.impl = impl
+
+        def __iter__(self):
+            return self
+
+        def __next__(self):
+            return ("", six.advance_iterator(self.impl)[1])
+
+printer = None
+
+def build_pretty_printers():
+    global printer
+
+    if printer != None:
+        return
+
+    printer = printing.Printer("boost.unordered")
+
+    printer.add('boost::unordered_map', UnorderedMapPrinter)
+    printer.add('boost::unordered_multimap', UnorderedMapPrinter)
+    printer.add('boost::unordered_multiset', UnorderedSetPrinter)
+    printer.add('boost::unordered_set', UnorderedSetPrinter)
+
+def register_pretty_printers(obj):
+    printing.register_pretty_printer(printer, obj)
+
+build_pretty_printers()
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/util/__init__.py b/solenv/gdb/boost/util/__init__.py
new file mode 100644
index 000000000..e7992304d
--- /dev/null
+++ b/solenv/gdb/boost/util/__init__.py
@@ -0,0 +1,3 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/util/compatibility.py b/solenv/gdb/boost/util/compatibility.py
new file mode 100644
index 000000000..e704b1992
--- /dev/null
+++ b/solenv/gdb/boost/util/compatibility.py
@@ -0,0 +1,32 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# Compatibility with older versions of GDB.
+#
+# 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
+
+use_gdb_printing = True
+try:
+    import gdb.printing
+except ImportError:
+    use_gdb_printing = False
+
+use_lazy_string = hasattr(gdb.Value, 'lazy_string')
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
diff --git a/solenv/gdb/boost/util/printing.py b/solenv/gdb/boost/util/printing.py
new file mode 100644
index 000000000..22bf29f80
--- /dev/null
+++ b/solenv/gdb/boost/util/printing.py
@@ -0,0 +1,137 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+# Printer interface adaptor.
+#
+# 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/>.
+
+
+try:
+    from collections.abc import Mapping
+except:
+    from collections import Mapping
+import gdb
+import re
+import six
+
+from boost.util.compatibility import use_gdb_printing
+
+class SimplePrinter(object):
+
+    def __init__(self, name, function):
+        self.name = name
+        self.function = function
+        self.enabled = True
+
+    def invoke(self, val):
+        if not self.enabled:
+            return None
+        return self.function(self.name, val)
+
+class NameLookup(Mapping):
+
+    def __init__(self):
+        self.map = {}
+        self.name_regex = re.compile(r'^([\w:]+)(<.*>)?')
+
+    def add(self, name, printer):
+        self.map[name] = printer
+
+    def __len__(self):
+        return len(self.map)
+
+    def __getitem__(self, type):
+        typename = self._basic_type(type)
+        if typename and typename in self.map:
+            return self.map[typename]
+        return None
+
+    def __iter__(self):
+        return self.map
+
+    def _basic_type(self, type):
+        basic_type = self.basic_type(type)
+        if basic_type:
+            match = self.name_regex.match(basic_type)
+            if match:
+                return match.group(1)
+        return None
+
+    @staticmethod
+    def basic_type(type):
+        if type.code == gdb.TYPE_CODE_REF:
+            type = type.target()
+        type = type.unqualified().strip_typedefs()
+        return type.tag
+
+class FunctionLookup(Mapping):
+
+    def __init__(self):
+        self.map = {}
+
+    def add(self, test, printer):
+        self.map[test] = printer
+
+    def __len__(self):
+        return len(self.map)
+
+    def __getitem__(self, type):
+        for (test, printer) in six.iteritems(self.map):
+            if test(type):
+                return printer
+        return None
+
+    def __iter__(self):
+        return self.map
+
+class Printer(object):
+
+    def __init__(self, name):
+        self.name = name
+        self.subprinters = []
+        self.name_lookup = NameLookup()
+        self.func_lookup = FunctionLookup()
+        self.enabled = True
+
+    def add(self, name, function, lookup = None):
+        printer = SimplePrinter(name, function)
+        self.subprinters.append(printer)
+        if not lookup:
+            self.name_lookup.add(name, printer)
+        else:
+            self.func_lookup.add(lookup, printer)
+
+
+    def __call__(self, val):
+        printer = self.name_lookup[val.type]
+        if not printer:
+            printer = self.func_lookup[val.type]
+
+        if printer:
+            return printer.invoke(val)
+        return None
+
+def register_pretty_printer(printer, obj):
+    '''Registers printer with objfile'''
+
+    if use_gdb_printing:
+        gdb.printing.register_pretty_printer(obj, printer)
+    else:
+        if obj is None:
+            obj = gdb
+        obj.pretty_printers.append(printer)
+
+# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab: