]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libsigrokdecode 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 <config.h> | |
22 | #include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
23 | ||
24 | /** | |
25 | * Import a Python module by name. | |
26 | * | |
27 | * This function is implemented in terms of PyImport_Import() rather than | |
28 | * PyImport_ImportModule(), so that the import hooks are not bypassed. | |
29 | * | |
30 | * @param[in] name The name of the module to load as UTF-8 string. | |
31 | * @return The Python module object, or NULL if an exception occurred. The | |
32 | * caller is responsible for evaluating and clearing the Python error state. | |
33 | * | |
34 | * @private | |
35 | */ | |
36 | SRD_PRIV PyObject *py_import_by_name(const char *name) | |
37 | { | |
38 | PyObject *py_mod, *py_modname; | |
39 | ||
40 | py_modname = PyUnicode_FromString(name); | |
41 | if (!py_modname) | |
42 | return NULL; | |
43 | ||
44 | py_mod = PyImport_Import(py_modname); | |
45 | Py_DECREF(py_modname); | |
46 | ||
47 | return py_mod; | |
48 | } | |
49 | ||
50 | /** | |
51 | * Get the value of a Python object's attribute, returned as a newly | |
52 | * allocated char *. | |
53 | * | |
54 | * @param[in] py_obj The object to probe. | |
55 | * @param[in] attr Name of the attribute to retrieve. | |
56 | * @param[out] outstr ptr to char * storage to be filled in. | |
57 | * | |
58 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
59 | * The 'outstr' argument points to a g_malloc()ed string upon success. | |
60 | * | |
61 | * @private | |
62 | */ | |
63 | SRD_PRIV int py_attr_as_str(PyObject *py_obj, const char *attr, char **outstr) | |
64 | { | |
65 | PyObject *py_str; | |
66 | int ret; | |
67 | ||
68 | if (!PyObject_HasAttrString(py_obj, attr)) { | |
69 | srd_dbg("Object has no attribute '%s'.", attr); | |
70 | return SRD_ERR_PYTHON; | |
71 | } | |
72 | ||
73 | if (!(py_str = PyObject_GetAttrString(py_obj, attr))) { | |
74 | srd_exception_catch("Failed to get attribute '%s'", attr); | |
75 | return SRD_ERR_PYTHON; | |
76 | } | |
77 | ||
78 | ret = py_str_as_str(py_str, outstr); | |
79 | Py_DECREF(py_str); | |
80 | ||
81 | return ret; | |
82 | } | |
83 | ||
84 | /** | |
85 | * Get the value of a Python dictionary item, returned as a newly | |
86 | * allocated char *. | |
87 | * | |
88 | * @param[in] py_obj The dictionary to probe. | |
89 | * @param[in] key Key of the item to retrieve. | |
90 | * @param[out] outstr Pointer to char * storage to be filled in. | |
91 | * | |
92 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
93 | * The 'outstr' argument points to a g_malloc()ed string upon success. | |
94 | * | |
95 | * @private | |
96 | */ | |
97 | SRD_PRIV int py_dictitem_as_str(PyObject *py_obj, const char *key, | |
98 | char **outstr) | |
99 | { | |
100 | PyObject *py_value; | |
101 | ||
102 | if (!PyDict_Check(py_obj)) { | |
103 | srd_dbg("Object is not a dictionary."); | |
104 | return SRD_ERR_PYTHON; | |
105 | } | |
106 | ||
107 | if (!(py_value = PyDict_GetItemString(py_obj, key))) { | |
108 | srd_dbg("Dictionary has no attribute '%s'.", key); | |
109 | return SRD_ERR_PYTHON; | |
110 | } | |
111 | ||
112 | return py_str_as_str(py_value, outstr); | |
113 | } | |
114 | ||
115 | /** | |
116 | * Get the value of a Python dictionary item, returned as a newly | |
117 | * allocated char *. | |
118 | * | |
119 | * @param py_obj The dictionary to probe. | |
120 | * @param py_key Key of the item to retrieve. | |
121 | * @param outstr Pointer to char * storage to be filled in. | |
122 | * | |
123 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
124 | * The 'outstr' argument points to a malloc()ed string upon success. | |
125 | * | |
126 | * @private | |
127 | */ | |
128 | SRD_PRIV int py_pydictitem_as_str(PyObject *py_obj, PyObject *py_key, | |
129 | char **outstr) | |
130 | { | |
131 | PyObject *py_value; | |
132 | ||
133 | if (!py_obj || !py_key || !outstr) | |
134 | return SRD_ERR_ARG; | |
135 | ||
136 | if (!PyDict_Check(py_obj)) { | |
137 | srd_dbg("Object is not a dictionary."); | |
138 | return SRD_ERR_PYTHON; | |
139 | } | |
140 | ||
141 | if (!(py_value = PyDict_GetItem(py_obj, py_key))) { | |
142 | srd_dbg("Dictionary has no such key."); | |
143 | return SRD_ERR_PYTHON; | |
144 | } | |
145 | ||
146 | if (!PyUnicode_Check(py_value)) { | |
147 | srd_dbg("Dictionary value should be a string."); | |
148 | return SRD_ERR_PYTHON; | |
149 | } | |
150 | ||
151 | return py_str_as_str(py_value, outstr); | |
152 | } | |
153 | ||
154 | /** | |
155 | * Get the value of a Python dictionary item, returned as a newly | |
156 | * allocated char *. | |
157 | * | |
158 | * @param py_obj The dictionary to probe. | |
159 | * @param py_key Key of the item to retrieve. | |
160 | * @param out TODO. | |
161 | * | |
162 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
163 | * | |
164 | * @private | |
165 | */ | |
166 | SRD_PRIV int py_pydictitem_as_long(PyObject *py_obj, PyObject *py_key, uint64_t *out) | |
167 | { | |
168 | PyObject *py_value; | |
169 | ||
170 | if (!py_obj || !py_key || !out) | |
171 | return SRD_ERR_ARG; | |
172 | ||
173 | if (!PyDict_Check(py_obj)) { | |
174 | srd_dbg("Object is not a dictionary."); | |
175 | return SRD_ERR_PYTHON; | |
176 | } | |
177 | ||
178 | if (!(py_value = PyDict_GetItem(py_obj, py_key))) { | |
179 | srd_dbg("Dictionary has no such key."); | |
180 | return SRD_ERR_PYTHON; | |
181 | } | |
182 | ||
183 | if (!PyLong_Check(py_value)) { | |
184 | srd_dbg("Dictionary value should be a long."); | |
185 | return SRD_ERR_PYTHON; | |
186 | } | |
187 | ||
188 | *out = PyLong_AsUnsignedLongLong(py_value); | |
189 | ||
190 | return SRD_OK; | |
191 | } | |
192 | ||
193 | /** | |
194 | * Get the value of a Python unicode string object, returned as a newly | |
195 | * allocated char *. | |
196 | * | |
197 | * @param[in] py_str The unicode string object. | |
198 | * @param[out] outstr ptr to char * storage to be filled in. | |
199 | * | |
200 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
201 | * The 'outstr' argument points to a g_malloc()ed string upon success. | |
202 | * | |
203 | * @private | |
204 | */ | |
205 | SRD_PRIV int py_str_as_str(PyObject *py_str, char **outstr) | |
206 | { | |
207 | PyObject *py_bytes; | |
208 | char *str; | |
209 | ||
210 | if (!PyUnicode_Check(py_str)) { | |
211 | srd_dbg("Object is not a string object."); | |
212 | return SRD_ERR_PYTHON; | |
213 | } | |
214 | ||
215 | py_bytes = PyUnicode_AsUTF8String(py_str); | |
216 | if (py_bytes) { | |
217 | str = g_strdup(PyBytes_AsString(py_bytes)); | |
218 | Py_DECREF(py_bytes); | |
219 | if (str) { | |
220 | *outstr = str; | |
221 | return SRD_OK; | |
222 | } | |
223 | } | |
224 | srd_exception_catch("Failed to extract string"); | |
225 | ||
226 | return SRD_ERR_PYTHON; | |
227 | } | |
228 | ||
229 | /** | |
230 | * Convert a Python list of unicode strings to a C string vector. | |
231 | * On success, a pointer to a newly allocated NULL-terminated array of | |
232 | * allocated C strings is written to @a out_strv. The caller must g_free() | |
233 | * each string and the array itself. | |
234 | * | |
235 | * @param[in] py_strseq The sequence object. | |
236 | * @param[out] out_strv Address of string vector to be filled in. | |
237 | * | |
238 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
239 | * | |
240 | * @private | |
241 | */ | |
242 | SRD_PRIV int py_strseq_to_char(PyObject *py_strseq, char ***out_strv) | |
243 | { | |
244 | PyObject *py_item, *py_bytes; | |
245 | char **strv, *str; | |
246 | ssize_t seq_len, i; | |
247 | ||
248 | if (!PySequence_Check(py_strseq)) { | |
249 | srd_err("Object does not provide sequence protocol."); | |
250 | return SRD_ERR_PYTHON; | |
251 | } | |
252 | ||
253 | seq_len = PySequence_Size(py_strseq); | |
254 | if (seq_len < 0) { | |
255 | srd_exception_catch("Failed to obtain sequence size"); | |
256 | return SRD_ERR_PYTHON; | |
257 | } | |
258 | ||
259 | strv = g_try_new0(char *, seq_len + 1); | |
260 | if (!strv) { | |
261 | srd_err("Failed to allocate result string vector."); | |
262 | return SRD_ERR_MALLOC; | |
263 | } | |
264 | ||
265 | for (i = 0; i < seq_len; i++) { | |
266 | py_item = PySequence_GetItem(py_strseq, i); | |
267 | if (!py_item) | |
268 | goto err_out; | |
269 | ||
270 | if (!PyUnicode_Check(py_item)) { | |
271 | Py_DECREF(py_item); | |
272 | goto err_out; | |
273 | } | |
274 | py_bytes = PyUnicode_AsUTF8String(py_item); | |
275 | Py_DECREF(py_item); | |
276 | if (!py_bytes) | |
277 | goto err_out; | |
278 | ||
279 | str = g_strdup(PyBytes_AsString(py_bytes)); | |
280 | Py_DECREF(py_bytes); | |
281 | if (!str) | |
282 | goto err_out; | |
283 | ||
284 | strv[i] = str; | |
285 | } | |
286 | *out_strv = strv; | |
287 | ||
288 | return SRD_OK; | |
289 | ||
290 | err_out: | |
291 | g_strfreev(strv); | |
292 | srd_exception_catch("Failed to obtain string item"); | |
293 | ||
294 | return SRD_ERR_PYTHON; | |
295 | } | |
296 | ||
297 | /** | |
298 | * Convert a Python scalar object to a GLib variant. | |
299 | * Supported variant types are string, int64 and double. | |
300 | * | |
301 | * @param[in] py_obj The Python object. Must not be NULL. | |
302 | * @return A floating reference to a new variant, or NULL on failure. | |
303 | * | |
304 | * @private | |
305 | */ | |
306 | SRD_PRIV GVariant *py_obj_to_variant(PyObject *py_obj) | |
307 | { | |
308 | GVariant *var = NULL; | |
309 | ||
310 | if (PyUnicode_Check(py_obj)) { /* string */ | |
311 | PyObject *py_bytes; | |
312 | const char *str; | |
313 | ||
314 | py_bytes = PyUnicode_AsUTF8String(py_obj); | |
315 | if (py_bytes) { | |
316 | str = PyBytes_AsString(py_bytes); | |
317 | if (str) | |
318 | var = g_variant_new_string(str); | |
319 | Py_DECREF(py_bytes); | |
320 | } | |
321 | if (!var) | |
322 | srd_exception_catch("Failed to extract string value"); | |
323 | ||
324 | } else if (PyLong_Check(py_obj)) { /* integer */ | |
325 | int64_t val; | |
326 | ||
327 | val = PyLong_AsLongLong(py_obj); | |
328 | if (!PyErr_Occurred()) | |
329 | var = g_variant_new_int64(val); | |
330 | else | |
331 | srd_exception_catch("Failed to extract integer value"); | |
332 | ||
333 | } else if (PyFloat_Check(py_obj)) { /* float */ | |
334 | double val; | |
335 | ||
336 | val = PyFloat_AsDouble(py_obj); | |
337 | if (!PyErr_Occurred()) | |
338 | var = g_variant_new_double(val); | |
339 | else | |
340 | srd_exception_catch("Failed to extract float value"); | |
341 | ||
342 | } else { | |
343 | srd_err("Failed to extract value of unsupported type."); | |
344 | } | |
345 | ||
346 | return var; | |
347 | } |