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b2c19614 BV |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2011 Bert Vermeulen <bert@biot.com> | |
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 | ||
21 | #include "config.h" | |
22 | #include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
23 | ||
24 | ||
25 | /** | |
26 | * Helper function to handle Python strings. | |
27 | * | |
28 | * TODO: @param entries. | |
29 | * | |
30 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
31 | * The 'outstr' argument points to a malloc()ed string upon success. | |
32 | */ | |
33 | int h_str(PyObject *py_res, PyObject *py_mod, const char *key, char **outstr) | |
34 | { | |
35 | PyObject *py_str; | |
36 | char *str; | |
37 | int ret; | |
38 | ||
39 | py_str = PyObject_GetAttrString(py_res, (char *)key); /* NEWREF */ | |
40 | if (!py_str || !PyString_Check(py_str)) { | |
41 | ret = SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
42 | goto err_h_decref_mod; | |
43 | } | |
44 | ||
45 | /* | |
46 | * PyString_AsString()'s returned string refers to an internal buffer | |
47 | * (not a copy), i.e. the data must not be modified, and the memory | |
48 | * must not be free()'d. | |
49 | */ | |
50 | if (!(str = PyString_AsString(py_str))) { | |
51 | ret = SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
52 | goto err_h_decref_str; | |
53 | } | |
54 | ||
55 | if (!(*outstr = g_strdup(str))) { | |
56 | ret = SRD_ERR_MALLOC; | |
57 | goto err_h_decref_str; | |
58 | } | |
59 | ||
60 | Py_XDECREF(py_str); | |
61 | ||
62 | return SRD_OK; | |
63 | ||
64 | err_h_decref_str: | |
65 | Py_XDECREF(py_str); | |
66 | err_h_decref_mod: | |
67 | Py_XDECREF(py_mod); | |
68 | ||
69 | if (PyErr_Occurred()) | |
70 | PyErr_Print(); /* Returns void. */ | |
71 | ||
72 | return ret; | |
73 | } | |
74 |