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d57a3c85 TJB |
1 | /* General utility routines for GDB/Python. |
2 | ||
3 | Copyright (C) 2008 Free Software Foundation, Inc. | |
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 | ||
49 | /* Converts a Python 8-bit string to a unicode string object. Assumes the | |
50 | 8-bit string is in the host charset. If an error occurs during conversion, | |
51 | returns NULL with a python exception set. | |
52 | ||
53 | As an added bonus, the functions accepts a unicode string and returns it | |
54 | right away, so callers don't need to check which kind of string they've | |
55 | got. | |
56 | ||
57 | If the given object is not one of the mentioned string types, NULL is | |
58 | returned, with the TypeError python exception set. */ | |
59 | PyObject * | |
60 | python_string_to_unicode (PyObject *obj) | |
61 | { | |
62 | PyObject *unicode_str; | |
63 | ||
64 | /* If obj is already a unicode string, just return it. | |
65 | I wish life was always that simple... */ | |
66 | if (PyUnicode_Check (obj)) | |
67 | unicode_str = obj; | |
68 | else if (PyString_Check (obj)) | |
69 | unicode_str = PyUnicode_FromEncodedObject (obj, host_charset (), NULL); | |
70 | else | |
71 | { | |
72 | PyErr_SetString (PyExc_TypeError, | |
73 | _("Expected a string or unicode object.")); | |
74 | unicode_str = NULL; | |
75 | } | |
76 | ||
77 | return unicode_str; | |
78 | } | |
79 | ||
80 | /* Returns a newly allocated string with the contents of the given unicode | |
81 | string object converted to the target's charset. If an error occurs during | |
82 | the conversion, NULL will be returned and a python exception will be set. | |
83 | ||
84 | The caller is responsible for xfree'ing the string. */ | |
85 | char * | |
86 | unicode_to_target_string (PyObject *unicode_str) | |
87 | { | |
88 | char *target_string; | |
89 | PyObject *string; | |
90 | ||
91 | /* Translate string to target's charset. */ | |
92 | string = PyUnicode_AsEncodedString (unicode_str, target_charset (), NULL); | |
93 | if (string == NULL) | |
94 | return NULL; | |
95 | ||
96 | target_string = xstrdup (PyString_AsString (string)); | |
97 | ||
98 | Py_DECREF (string); | |
99 | ||
100 | return target_string; | |
101 | } | |
102 | ||
103 | /* Converts a python string (8-bit or unicode) to a target string in | |
104 | the target's charset. Returns NULL on error, with a python exception set. | |
105 | ||
106 | The caller is responsible for xfree'ing the string. */ | |
107 | char * | |
108 | python_string_to_target_string (PyObject *obj) | |
109 | { | |
110 | PyObject *str; | |
111 | ||
112 | str = python_string_to_unicode (obj); | |
113 | if (str == NULL) | |
114 | return NULL; | |
115 | ||
116 | return unicode_to_target_string (str); | |
117 | } |