# Copyright (C) 2016 g10 Code GmbH

# Copyright (C) 2004,2008 Igor Belyi <belyi@users.sourceforge.net>

# Copyright (C) 2002 John Goerzen <jgoerzen@complete.org>

#

#    This library is free software; you can redistribute it and/or

#    modify it under the terms of the GNU Lesser General Public

#    License as published by the Free Software Foundation; either

#    version 2.1 of the License, or (at your option) any later version.

#

#    This library 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

#    Lesser General Public License for more details.

#

#    You should have received a copy of the GNU Lesser General Public

#    License along with this library; if not, write to the Free Software

#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA

from __future__ import absolute_import, print_function, unicode_literals

del absolute_import, print_function, unicode_literals

import sys

def process_constants(prefix, scope):

    """Called by the constant modules to load up the constants from the C

    library starting with PREFIX.  Matching constants will be inserted

    into SCOPE with PREFIX stripped from the names.  Returns the names

    of inserted constants.

    """

    from . import gpgme

    index = len(prefix)

    constants = {identifier[index:]: getattr(gpgme, identifier)

                 for identifier in dir(gpgme)

                 if identifier.startswith(prefix)}

    scope.update(constants)

    return list(constants.keys())

def percent_escape(s):

    return ''.join(

        '%{0:2x}'.format(ord(c))

        if c == '+' or c == '"' or c == '%' or ord(c) <= 0x20 else c

        for c in s)

# Python2/3 compatibility

if sys.version_info[0] == 3:

    # Python3

    def is_a_string(x):

        return isinstance(x, str)

else:

    # Python2

    def is_a_string(x):

        return isinstance(x, basestring)