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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2012 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 "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include "sigrokdecode-internal.h" | |
23 | #include "config.h" | |
24 | ||
25 | /** | |
26 | * Get the value of a python object's attribute, returned as a newly | |
27 | * allocated char *. | |
28 | * | |
29 | * @param py_obj The object to probe. | |
30 | * @param attr Name of the attribute to retrieve. | |
31 | * @param outstr ptr to char * storage to be filled in. | |
32 | * | |
33 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
34 | * The 'outstr' argument points to a malloc()ed string upon success. | |
35 | */ | |
36 | int py_attr_as_str(PyObject *py_obj, const char *attr, char **outstr) | |
37 | { | |
38 | PyObject *py_str; | |
39 | int ret; | |
40 | ||
41 | if (!PyObject_HasAttrString(py_obj, attr)) { | |
42 | srd_dbg("%s object has no attribute '%s'.", | |
43 | Py_TYPE(py_obj)->tp_name, attr); | |
44 | return SRD_ERR_PYTHON; | |
45 | } | |
46 | ||
47 | if (!(py_str = PyObject_GetAttrString(py_obj, attr))) { | |
48 | catch_exception(""); | |
49 | return SRD_ERR_PYTHON; | |
50 | } | |
51 | ||
52 | if (!PyUnicode_Check(py_str)) { | |
53 | srd_dbg("%s attribute should be a string, but is a %s.", | |
54 | attr, Py_TYPE(py_str)->tp_name); | |
55 | Py_DecRef(py_str); | |
56 | return SRD_ERR_PYTHON; | |
57 | } | |
58 | ||
59 | ret = py_str_as_str(py_str, outstr); | |
60 | Py_DecRef(py_str); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | ||
65 | /** | |
66 | * Get the value of a python dictionary item, returned as a newly | |
67 | * allocated char *. | |
68 | * | |
69 | * @param py_obj The dictionary to probe. | |
70 | * @param attr Key of the item to retrieve. | |
71 | * @param outstr ptr to char * storage to be filled in. | |
72 | * | |
73 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
74 | * The 'outstr' argument points to a malloc()ed string upon success. | |
75 | */ | |
76 | int py_dictitem_as_str(PyObject *py_obj, const char *key, char **outstr) | |
77 | { | |
78 | PyObject *py_value; | |
79 | int ret; | |
80 | ||
81 | if (!PyDict_Check(py_obj)) { | |
82 | srd_dbg("Object is a %s, not a dictionary.", | |
83 | Py_TYPE(py_obj)->tp_name); | |
84 | return SRD_ERR_PYTHON; | |
85 | } | |
86 | ||
87 | if (!(py_value = PyDict_GetItemString(py_obj, key))) { | |
88 | srd_dbg("Dictionary has no attribute '%s'.", key); | |
89 | return SRD_ERR_PYTHON; | |
90 | } | |
91 | ||
92 | if (!PyUnicode_Check(py_value)) { | |
93 | srd_dbg("Dictionary value for %s should be a string, but is " | |
94 | "a %s.", key, Py_TYPE(py_value)->tp_name); | |
95 | return SRD_ERR_PYTHON; | |
96 | } | |
97 | ||
98 | ret = py_str_as_str(py_value, outstr); | |
99 | ||
100 | return SRD_OK; | |
101 | } | |
102 | ||
103 | /** | |
104 | * Get the value of a python unicode string object, returned as a newly | |
105 | * allocated char *. | |
106 | * | |
107 | * @param py_str The unicode string object. | |
108 | * @param outstr ptr to char * storage to be filled in. | |
109 | * | |
110 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
111 | * The 'outstr' argument points to a malloc()ed string upon success. | |
112 | */ | |
113 | int py_str_as_str(PyObject *py_str, char **outstr) | |
114 | { | |
115 | PyObject *py_encstr; | |
116 | int ret; | |
117 | char *str; | |
118 | ||
119 | py_encstr = NULL; | |
120 | str = NULL; | |
121 | ret = SRD_OK; | |
122 | ||
123 | if (!PyUnicode_Check(py_str)) { | |
124 | srd_dbg("Object is a %s, not a string object.", | |
125 | Py_TYPE(py_str)->tp_name); | |
126 | ret = SRD_ERR_PYTHON; | |
127 | goto err_out; | |
128 | } | |
129 | ||
130 | if (!(py_encstr = PyUnicode_AsEncodedString(py_str, "utf-8", NULL))) { | |
131 | ret = SRD_ERR_PYTHON; | |
132 | goto err_out; | |
133 | } | |
134 | if (!(str = PyBytes_AS_STRING(py_encstr))) { | |
135 | ret = SRD_ERR_PYTHON; | |
136 | goto err_out; | |
137 | } | |
138 | ||
139 | if (!(*outstr = g_strdup(str))) { | |
140 | srd_dbg("outstr malloc failed"); | |
141 | ret = SRD_ERR_MALLOC; | |
142 | goto err_out; | |
143 | } | |
144 | ||
145 | err_out: | |
146 | if (py_encstr) | |
147 | Py_XDECREF(py_encstr); | |
148 | ||
149 | if (PyErr_Occurred()) { | |
150 | catch_exception("string conversion failed"); | |
151 | } | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | /** | |
157 | * Convert a python list of unicode strings to a NULL-terminated UTF8-encoded | |
158 | * char * array. The caller must free each string when finished. | |
159 | * | |
160 | * @param py_strlist The list object. | |
161 | * @param outstr ptr to char ** storage to be filled in. | |
162 | * | |
163 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
164 | * The 'outstr' argument points to a malloc()ed char ** upon success. | |
165 | */ | |
166 | int py_strlist_to_char(PyObject *py_strlist, char ***outstr) | |
167 | { | |
168 | PyObject *py_str; | |
169 | int list_len, i; | |
170 | char **out, *str; | |
171 | ||
172 | list_len = PyList_Size(py_strlist); | |
173 | if (!(out = g_try_malloc(sizeof(char *) * (list_len + 1)))) | |
174 | return SRD_ERR_MALLOC; | |
175 | for (i = 0; i < list_len; i++) { | |
176 | if (!(py_str = PyUnicode_AsEncodedString( | |
177 | PyList_GetItem(py_strlist, i), "utf-8", NULL))) | |
178 | return SRD_ERR_PYTHON; | |
179 | if (!(str = PyBytes_AS_STRING(py_str))) | |
180 | return SRD_ERR_PYTHON; | |
181 | out[i] = g_strdup(str); | |
182 | } | |
183 | out[i] = NULL; | |
184 | *outstr = out; | |
185 | ||
186 | return SRD_OK; | |
187 | } |