~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2009 Canonical Ltd

#

# 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 2 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, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Interface definition of a class to intern StaticTuple objects."""

cdef extern from "python-compat.h":

    ctypedef long Py_ssize_t

cdef extern from "Python.h":

    ctypedef struct PyObject:

        pass

cdef public api class StaticTupleInterner [object StaticTupleInternerObject,

                                           type StaticTupleInterner_type]:

    cdef readonly Py_ssize_t used    # active

    cdef readonly Py_ssize_t fill    # active + dummy

    cdef readonly Py_ssize_t mask    # Table contains (mask+1) slots, a power

                                     # of 2

    cdef PyObject **table   # Pyrex/Cython doesn't support arrays to 'object'

                            # so we manage it manually

    cdef PyObject *_get(self, object key) except? NULL

    cpdef object add(self, key)

    cpdef int discard(self, key) except -1

    cdef int _insert_clean(self, PyObject *key) except -1

    cpdef Py_ssize_t _resize(self, Py_ssize_t min_unused) except -1

# TODO: might want to export the C api here, though it is all available from

#       the class object...

cdef api object StaticTupleInterner_Add(object self, object key)