1#
2# Gramps - a GTK+/GNOME based genealogy program
3#
4# Copyright (C) 2000-2007  Donald N. Allingham
5# Copyright (C) 2009       Gary Burton
6# Copyright (C) 2011       Tim G L Lyons
7#
8# This program is free software; you can redistribute it and/or modify
9# it under the terms of the GNU General Public License as published by
10# the Free Software Foundation; either version 2 of the License, or
11# (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program; if not, write to the Free Software
20# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21#
22
23"""
24Utility functions to cast types
25"""
26
27#-------------------------------------------------------------------------
28#
29# Python modules
30#
31#-------------------------------------------------------------------------
32import os
33import sys
34import logging
35LOG = logging.getLogger(".")
36
37#-------------------------------------------------------------------------
38#
39# Gramps modules
40#
41#-------------------------------------------------------------------------
42from ..const import GRAMPS_LOCALE as glocale
43_ = glocale.translation.gettext
44
45def cast_to_bool(val):
46    return val in ['True', 'true', _('True'), _('true'), '1'] # 3139
47
48def get_type_converter(val):
49    """
50    Return function that converts strings into the type of val.
51    """
52    val_type = type(val)
53    if isinstance(val, str):
54        return str
55    elif val_type == int:
56        return int
57    elif val_type == float:
58        return float
59    elif val_type == bool:
60        return cast_to_bool
61    elif val_type in (list, tuple):
62        return list
63
64def type_name(val):
65    """
66    Return the name the type of val.
67
68    Only numbers and strings are supported.
69    The rest becomes strings (unicode).
70    """
71    val_type = type(val)
72    if val_type == int:
73        return 'int'
74    elif val_type == float:
75        return 'float'
76    elif val_type == bool:
77        return 'bool'
78    elif isinstance(val, str):
79        return 'unicode'
80    return 'unicode'
81
82def get_type_converter_by_name(val_str):
83    """
84    Return function that converts strings into the type given by val_str.
85
86    Only numbers and strings are supported.
87    The rest becomes strings (unicode).
88    """
89    if val_str == 'int':
90        return int
91    elif val_str == 'float':
92        return float
93    elif val_str == 'bool':
94        return cast_to_bool
95    elif val_str in ('str', 'unicode'):
96        return str
97    return str
98