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d57a3c85 TJB |
1 | /* General utility routines for GDB/Python. |
2 | ||
0fb0cc75 | 3 | Copyright (C) 2008, 2009 Free Software Foundation, Inc. |
d57a3c85 TJB |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "charset.h" | |
22 | #include "python-internal.h" | |
23 | ||
24 | ||
25 | /* This is a cleanup function which decrements the refcount on a | |
26 | Python object. */ | |
27 | ||
28 | static void | |
29 | py_decref (void *p) | |
30 | { | |
31 | PyObject *py = p; | |
32 | /* Note that we need the extra braces in this 'if' to avoid a | |
33 | warning from gcc. */ | |
34 | if (py) | |
35 | { | |
36 | Py_DECREF (py); | |
37 | } | |
38 | } | |
39 | ||
40 | /* Return a new cleanup which will decrement the Python object's | |
41 | refcount when run. */ | |
42 | ||
43 | struct cleanup * | |
44 | make_cleanup_py_decref (PyObject *py) | |
45 | { | |
46 | return make_cleanup (py_decref, (void *) py); | |
47 | } | |
48 | ||
ca30a762 TT |
49 | /* A cleanup function to restore the thread state. */ |
50 | ||
51 | static void | |
52 | py_gil_restore (void *p) | |
53 | { | |
54 | PyGILState_STATE *state = p; | |
55 | PyGILState_Release (*state); | |
56 | } | |
57 | ||
58 | /* Return a new cleanup which will restore the Python GIL state. */ | |
59 | ||
60 | struct cleanup * | |
61 | make_cleanup_py_restore_gil (PyGILState_STATE *state) | |
62 | { | |
63 | return make_cleanup (py_gil_restore, state); | |
64 | } | |
65 | ||
d57a3c85 TJB |
66 | /* Converts a Python 8-bit string to a unicode string object. Assumes the |
67 | 8-bit string is in the host charset. If an error occurs during conversion, | |
68 | returns NULL with a python exception set. | |
69 | ||
70 | As an added bonus, the functions accepts a unicode string and returns it | |
71 | right away, so callers don't need to check which kind of string they've | |
72 | got. | |
73 | ||
74 | If the given object is not one of the mentioned string types, NULL is | |
75 | returned, with the TypeError python exception set. */ | |
76 | PyObject * | |
77 | python_string_to_unicode (PyObject *obj) | |
78 | { | |
79 | PyObject *unicode_str; | |
80 | ||
81 | /* If obj is already a unicode string, just return it. | |
82 | I wish life was always that simple... */ | |
83 | if (PyUnicode_Check (obj)) | |
84 | unicode_str = obj; | |
85 | else if (PyString_Check (obj)) | |
86 | unicode_str = PyUnicode_FromEncodedObject (obj, host_charset (), NULL); | |
87 | else | |
88 | { | |
89 | PyErr_SetString (PyExc_TypeError, | |
90 | _("Expected a string or unicode object.")); | |
91 | unicode_str = NULL; | |
92 | } | |
93 | ||
94 | return unicode_str; | |
95 | } | |
96 | ||
97 | /* Returns a newly allocated string with the contents of the given unicode | |
98 | string object converted to the target's charset. If an error occurs during | |
99 | the conversion, NULL will be returned and a python exception will be set. | |
100 | ||
101 | The caller is responsible for xfree'ing the string. */ | |
102 | char * | |
103 | unicode_to_target_string (PyObject *unicode_str) | |
104 | { | |
105 | char *target_string; | |
106 | PyObject *string; | |
107 | ||
108 | /* Translate string to target's charset. */ | |
109 | string = PyUnicode_AsEncodedString (unicode_str, target_charset (), NULL); | |
110 | if (string == NULL) | |
111 | return NULL; | |
112 | ||
113 | target_string = xstrdup (PyString_AsString (string)); | |
114 | ||
115 | Py_DECREF (string); | |
116 | ||
117 | return target_string; | |
118 | } | |
119 | ||
120 | /* Converts a python string (8-bit or unicode) to a target string in | |
121 | the target's charset. Returns NULL on error, with a python exception set. | |
122 | ||
123 | The caller is responsible for xfree'ing the string. */ | |
124 | char * | |
125 | python_string_to_target_string (PyObject *obj) | |
126 | { | |
127 | PyObject *str; | |
128 | ||
129 | str = python_string_to_unicode (obj); | |
130 | if (str == NULL) | |
131 | return NULL; | |
132 | ||
133 | return unicode_to_target_string (str); | |
134 | } |