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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> | |
4fadb128 | 5 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> |
b2c19614 BV |
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" | |
73191416 | 22 | #include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ |
15969949 | 23 | #include "sigrokdecode-internal.h" |
eb2bbd66 | 24 | #include <glib.h> |
b2c19614 BV |
25 | |
26 | /* The list of protocol decoders. */ | |
55c3c5f4 | 27 | SRD_PRIV GSList *pd_list = NULL; |
b2c19614 | 28 | |
c9bfccc6 | 29 | /* module_sigrokdecode.c */ |
55c3c5f4 | 30 | extern SRD_PRIV PyObject *mod_sigrokdecode; |
451680f1 | 31 | |
b2c19614 BV |
32 | /** |
33 | * Returns the list of supported/loaded protocol decoders. | |
34 | * | |
35 | * This is a GSList containing the names of the decoders as strings. | |
36 | * | |
37 | * @return List of decoders, NULL if none are supported or loaded. | |
38 | */ | |
55c3c5f4 | 39 | SRD_API GSList *srd_list_decoders(void) |
b2c19614 | 40 | { |
e5080882 | 41 | return pd_list; |
b2c19614 BV |
42 | } |
43 | ||
b2c19614 BV |
44 | /** |
45 | * Get the decoder with the specified ID. | |
46 | * | |
47 | * @param id The ID string of the decoder to return. | |
48 | * @return The decoder with the specified ID, or NULL if not found. | |
49 | */ | |
55c3c5f4 | 50 | SRD_API struct srd_decoder *srd_get_decoder_by_id(const char *id) |
b2c19614 BV |
51 | { |
52 | GSList *l; | |
53 | struct srd_decoder *dec; | |
54 | ||
55 | for (l = srd_list_decoders(); l; l = l->next) { | |
56 | dec = l->data; | |
57 | if (!strcmp(dec->id, id)) | |
58 | return dec; | |
59 | } | |
60 | ||
61 | return NULL; | |
62 | } | |
63 | ||
f38ec285 BV |
64 | static int get_probes(struct srd_decoder *d, char *attr, GSList **pl) |
65 | { | |
66 | PyObject *py_probelist, *py_entry; | |
67 | struct srd_probe *p; | |
68 | int ret, num_probes, i; | |
69 | ||
70 | if (!PyObject_HasAttrString(d->py_dec, attr)) | |
71 | /* No probes of this type specified. */ | |
72 | return SRD_OK; | |
73 | ||
74 | ret = SRD_ERR_PYTHON; | |
75 | py_probelist = py_entry = NULL; | |
76 | ||
77 | py_probelist = PyObject_GetAttrString(d->py_dec, attr); | |
78 | if (!PyList_Check(py_probelist)) { | |
79 | srd_err("Protocol decoder %s %s attribute is not " | |
c9bfccc6 | 80 | "a list.", d->name, attr); |
f38ec285 BV |
81 | goto err_out; |
82 | } | |
83 | ||
84 | num_probes = PyList_Size(py_probelist); | |
85 | if (num_probes == 0) | |
86 | /* Empty probelist. */ | |
87 | return SRD_OK; | |
88 | ||
89 | for (i = 0; i < num_probes; i++) { | |
90 | py_entry = PyList_GetItem(py_probelist, i); | |
91 | if (!PyDict_Check(py_entry)) { | |
92 | srd_err("Protocol decoder %s %s attribute is not " | |
c9bfccc6 | 93 | "a list with dict elements.", d->name, attr); |
f38ec285 BV |
94 | goto err_out; |
95 | } | |
96 | ||
97 | if (!(p = g_try_malloc(sizeof(struct srd_probe)))) { | |
a61ece20 | 98 | srd_err("Failed to g_malloc() struct srd_probe."); |
f38ec285 BV |
99 | ret = SRD_ERR_MALLOC; |
100 | goto err_out; | |
101 | } | |
102 | ||
103 | if ((py_dictitem_as_str(py_entry, "id", &p->id)) != SRD_OK) | |
104 | goto err_out; | |
105 | if ((py_dictitem_as_str(py_entry, "name", &p->name)) != SRD_OK) | |
106 | goto err_out; | |
107 | if ((py_dictitem_as_str(py_entry, "desc", &p->desc)) != SRD_OK) | |
108 | goto err_out; | |
109 | p->order = i; | |
110 | ||
111 | *pl = g_slist_append(*pl, p); | |
112 | } | |
113 | ret = SRD_OK; | |
114 | ||
115 | err_out: | |
116 | Py_DecRef(py_entry); | |
117 | Py_DecRef(py_probelist); | |
118 | ||
119 | return ret; | |
120 | } | |
121 | ||
b2c19614 | 122 | /** |
64c29e28 | 123 | * Load a protocol decoder module into the embedded Python interpreter. |
b2c19614 | 124 | * |
15969949 BV |
125 | * @param name The module name to be loaded. |
126 | * @param dec Pointer to the struct srd_decoder filled with the loaded module. | |
b2c19614 BV |
127 | * |
128 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
129 | */ | |
55c3c5f4 | 130 | SRD_API int srd_load_decoder(const char *name, struct srd_decoder **dec) |
b2c19614 | 131 | { |
11ea8ae1 | 132 | PyObject *py_basedec, *py_method, *py_attr, *py_annlist, *py_ann; |
b2c19614 | 133 | struct srd_decoder *d; |
451680f1 | 134 | int alen, ret, i; |
15969949 | 135 | char **ann; |
b2c19614 | 136 | |
7a1712c4 | 137 | srd_dbg("Loading module '%s'.", name); |
64c29e28 | 138 | |
d906d3f9 | 139 | py_basedec = py_method = py_attr = NULL; |
b2c19614 | 140 | |
451680f1 | 141 | if (!(d = g_try_malloc0(sizeof(struct srd_decoder)))) { |
a61ece20 | 142 | srd_dbg("Failed to g_malloc() struct srd_decoder."); |
451680f1 BV |
143 | ret = SRD_ERR_MALLOC; |
144 | goto err_out; | |
b2c19614 BV |
145 | } |
146 | ||
21481b66 BV |
147 | ret = SRD_ERR_PYTHON; |
148 | ||
451680f1 BV |
149 | /* Import the Python module. */ |
150 | if (!(d->py_mod = PyImport_ImportModule(name))) { | |
2086c684 | 151 | catch_exception("import of '%s' failed.", name); |
451680f1 BV |
152 | goto err_out; |
153 | } | |
b2c19614 | 154 | |
451680f1 BV |
155 | /* Get the 'Decoder' class as Python object. */ |
156 | if (!(d->py_dec = PyObject_GetAttrString(d->py_mod, "Decoder"))) { | |
157 | /* This generated an AttributeError exception. */ | |
158 | PyErr_Clear(); | |
d906d3f9 | 159 | srd_err("Decoder class not found in protocol decoder %s.", name); |
451680f1 BV |
160 | goto err_out; |
161 | } | |
b2c19614 | 162 | |
451680f1 | 163 | if (!(py_basedec = PyObject_GetAttrString(mod_sigrokdecode, "Decoder"))) { |
7a1712c4 | 164 | srd_dbg("sigrokdecode module not loaded."); |
451680f1 BV |
165 | goto err_out; |
166 | } | |
b2c19614 | 167 | |
451680f1 BV |
168 | if (!PyObject_IsSubclass(d->py_dec, py_basedec)) { |
169 | srd_err("Decoder class in protocol decoder module %s is not " | |
c9bfccc6 | 170 | "a subclass of sigrokdecode.Decoder.", name); |
451680f1 BV |
171 | goto err_out; |
172 | } | |
ad022d94 | 173 | Py_CLEAR(py_basedec); |
b2c19614 | 174 | |
1d552cd3 BV |
175 | /* Check for a proper start() method. */ |
176 | if (!PyObject_HasAttrString(d->py_dec, "start")) { | |
177 | srd_err("Protocol decoder %s has no start() method Decoder " | |
c9bfccc6 | 178 | "class.", name); |
1d552cd3 BV |
179 | goto err_out; |
180 | } | |
181 | py_method = PyObject_GetAttrString(d->py_dec, "start"); | |
182 | if (!PyFunction_Check(py_method)) { | |
d906d3f9 | 183 | srd_err("Protocol decoder %s Decoder class attribute 'start' " |
c9bfccc6 | 184 | "is not a method.", name); |
1d552cd3 BV |
185 | goto err_out; |
186 | } | |
ad022d94 | 187 | Py_CLEAR(py_method); |
1d552cd3 BV |
188 | |
189 | /* Check for a proper decode() method. */ | |
190 | if (!PyObject_HasAttrString(d->py_dec, "decode")) { | |
191 | srd_err("Protocol decoder %s has no decode() method Decoder " | |
c9bfccc6 | 192 | "class.", name); |
1d552cd3 BV |
193 | goto err_out; |
194 | } | |
195 | py_method = PyObject_GetAttrString(d->py_dec, "decode"); | |
196 | if (!PyFunction_Check(py_method)) { | |
197 | srd_err("Protocol decoder %s Decoder class attribute 'decode' " | |
c9bfccc6 | 198 | "is not a method.", name); |
1d552cd3 BV |
199 | goto err_out; |
200 | } | |
ad022d94 | 201 | Py_CLEAR(py_method); |
1d552cd3 | 202 | |
11ea8ae1 BV |
203 | /* If present, options must be a dictionary. */ |
204 | if (PyObject_HasAttrString(d->py_dec, "options")) { | |
205 | py_attr = PyObject_GetAttrString(d->py_dec, "options"); | |
206 | if (!PyDict_Check(py_attr)) { | |
207 | srd_err("Protocol decoder %s options attribute is not " | |
c9bfccc6 | 208 | "a dictionary.", d->name); |
ad022d94 | 209 | Py_DecRef(py_attr); |
11ea8ae1 BV |
210 | goto err_out; |
211 | } | |
212 | Py_DecRef(py_attr); | |
213 | } | |
214 | ||
f38ec285 BV |
215 | /* Check and import required probes. */ |
216 | if (get_probes(d, "probes", &d->probes) != SRD_OK) | |
217 | goto err_out; | |
218 | ||
219 | /* Check and import optional probes. */ | |
dcdf4883 | 220 | if (get_probes(d, "optional_probes", &d->opt_probes) != SRD_OK) |
f38ec285 BV |
221 | goto err_out; |
222 | ||
223 | /* Store required fields in newly allocated strings. */ | |
21481b66 | 224 | if (py_attr_as_str(d->py_dec, "id", &(d->id)) != SRD_OK) |
451680f1 | 225 | goto err_out; |
b2c19614 | 226 | |
21481b66 | 227 | if (py_attr_as_str(d->py_dec, "name", &(d->name)) != SRD_OK) |
451680f1 | 228 | goto err_out; |
b2c19614 | 229 | |
21481b66 | 230 | if (py_attr_as_str(d->py_dec, "longname", &(d->longname)) != SRD_OK) |
451680f1 | 231 | goto err_out; |
b2c19614 | 232 | |
21481b66 | 233 | if (py_attr_as_str(d->py_dec, "desc", &(d->desc)) != SRD_OK) |
451680f1 | 234 | goto err_out; |
b2c19614 | 235 | |
21481b66 | 236 | if (py_attr_as_str(d->py_dec, "license", &(d->license)) != SRD_OK) |
451680f1 | 237 | goto err_out; |
b2c19614 | 238 | |
451680f1 | 239 | /* TODO: Handle inputformats, outputformats. */ |
b2c19614 BV |
240 | d->inputformats = NULL; |
241 | d->outputformats = NULL; | |
242 | ||
15969949 | 243 | /* Convert class annotation attribute to GSList of **char */ |
e97b6ef5 | 244 | d->annotations = NULL; |
451680f1 BV |
245 | if (PyObject_HasAttrString(d->py_dec, "annotations")) { |
246 | py_annlist = PyObject_GetAttrString(d->py_dec, "annotations"); | |
15969949 | 247 | if (!PyList_Check(py_annlist)) { |
c9bfccc6 UH |
248 | srd_err("Protocol decoder module %s annotations " |
249 | "should be a list.", name); | |
451680f1 | 250 | goto err_out; |
15969949 BV |
251 | } |
252 | alen = PyList_Size(py_annlist); | |
253 | for (i = 0; i < alen; i++) { | |
254 | py_ann = PyList_GetItem(py_annlist, i); | |
255 | if (!PyList_Check(py_ann) || PyList_Size(py_ann) != 2) { | |
c9bfccc6 UH |
256 | srd_err("Protocol decoder module %s " |
257 | "annotation %d should be a list with " | |
258 | "two elements.", name, i + 1); | |
451680f1 | 259 | goto err_out; |
15969949 BV |
260 | } |
261 | ||
451680f1 | 262 | if (py_strlist_to_char(py_ann, &ann) != SRD_OK) { |
451680f1 BV |
263 | goto err_out; |
264 | } | |
e97b6ef5 | 265 | d->annotations = g_slist_append(d->annotations, ann); |
15969949 BV |
266 | } |
267 | } | |
268 | ||
b2c19614 | 269 | *dec = d; |
451680f1 BV |
270 | ret = SRD_OK; |
271 | ||
272 | err_out: | |
273 | if (ret != SRD_OK) { | |
1d552cd3 | 274 | Py_XDECREF(py_method); |
451680f1 BV |
275 | Py_XDECREF(py_basedec); |
276 | Py_XDECREF(d->py_dec); | |
277 | Py_XDECREF(d->py_mod); | |
278 | g_free(d); | |
279 | } | |
b2c19614 | 280 | |
451680f1 BV |
281 | return ret; |
282 | } | |
283 | ||
55c3c5f4 | 284 | SRD_API char *srd_decoder_doc(struct srd_decoder *dec) |
451680f1 | 285 | { |
e7edca07 | 286 | PyObject *py_str; |
451680f1 BV |
287 | char *doc; |
288 | ||
e7edca07 BV |
289 | if (!PyObject_HasAttrString(dec->py_mod, "__doc__")) |
290 | return NULL; | |
291 | ||
292 | if (!(py_str = PyObject_GetAttrString(dec->py_mod, "__doc__"))) { | |
2086c684 | 293 | catch_exception(""); |
e7edca07 BV |
294 | return NULL; |
295 | } | |
296 | ||
451680f1 | 297 | doc = NULL; |
e7edca07 BV |
298 | if (py_str != Py_None) |
299 | py_str_as_str(py_str, &doc); | |
300 | Py_DecRef(py_str); | |
451680f1 BV |
301 | |
302 | return doc; | |
b2c19614 BV |
303 | } |
304 | ||
fa12a21e BV |
305 | static void free_probes(GSList *probelist) |
306 | { | |
307 | GSList *l; | |
308 | struct srd_probe *p; | |
309 | ||
310 | if (probelist == NULL) | |
311 | return; | |
312 | ||
313 | for (l = probelist; l; l = l->next) { | |
314 | p = l->data; | |
315 | g_free(p->id); | |
316 | g_free(p->name); | |
317 | g_free(p->desc); | |
318 | g_free(p); | |
319 | } | |
320 | g_slist_free(probelist); | |
321 | ||
322 | } | |
323 | ||
b2c19614 | 324 | /** |
451680f1 BV |
325 | * Unload decoder module. |
326 | * | |
fa12a21e | 327 | * @param dec The struct srd_decoder to be unloaded. |
451680f1 BV |
328 | * |
329 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
b2c19614 | 330 | */ |
55c3c5f4 | 331 | SRD_API int srd_unload_decoder(struct srd_decoder *dec) |
b2c19614 | 332 | { |
fa12a21e BV |
333 | srd_dbg("unloading decoder %s", dec->name); |
334 | ||
335 | /* Since any instances of this decoder need to be released as well, | |
336 | * but they could be anywhere in the stack, just free the entire | |
337 | * stack. A frontend reloading a decoder thus has to restart all | |
338 | * instances, and rebuild the stack. */ | |
339 | srd_instance_free_all(NULL); | |
340 | ||
341 | free_probes(dec->probes); | |
dcdf4883 | 342 | free_probes(dec->opt_probes); |
b2c19614 BV |
343 | g_free(dec->id); |
344 | g_free(dec->name); | |
b231546d | 345 | g_free(dec->longname); |
b2c19614 | 346 | g_free(dec->desc); |
b231546d | 347 | g_free(dec->license); |
b2c19614 BV |
348 | |
349 | /* TODO: Free everything in inputformats and outputformats. */ | |
b2c19614 BV |
350 | if (dec->inputformats != NULL) |
351 | g_slist_free(dec->inputformats); | |
352 | if (dec->outputformats != NULL) | |
353 | g_slist_free(dec->outputformats); | |
354 | ||
fa12a21e | 355 | /* The module's Decoder class. */ |
451680f1 | 356 | Py_XDECREF(dec->py_dec); |
fa12a21e | 357 | /* The module itself. */ |
b2c19614 BV |
358 | Py_XDECREF(dec->py_mod); |
359 | ||
360 | /* TODO: (g_)free dec itself? */ | |
361 | ||
362 | return SRD_OK; | |
363 | } | |
364 | ||
55c3c5f4 | 365 | SRD_API int srd_load_all_decoders(void) |
b2c19614 | 366 | { |
eb2bbd66 BV |
367 | GDir *dir; |
368 | GError *error; | |
369 | struct srd_decoder *dec; | |
b2c19614 | 370 | int ret; |
eb2bbd66 | 371 | const gchar *direntry; |
b2c19614 | 372 | char *decodername; |
b2c19614 | 373 | |
eb2bbd66 | 374 | if (!(dir = g_dir_open(DECODERS_DIR, 0, &error))) { |
b2c19614 BV |
375 | return SRD_ERR_DECODERS_DIR; |
376 | } | |
377 | ||
eb2bbd66 | 378 | while ((direntry = g_dir_read_name(dir)) != NULL) { |
64c29e28 | 379 | /* The decoder name is the PD directory name (e.g. "i2c"). */ |
eb2bbd66 | 380 | decodername = g_strdup(direntry); |
b2c19614 | 381 | |
b2c19614 BV |
382 | if ((ret = srd_load_decoder(decodername, &dec)) == SRD_OK) { |
383 | /* Append it to the list of supported/loaded decoders. */ | |
e5080882 | 384 | pd_list = g_slist_append(pd_list, dec); |
b2c19614 BV |
385 | } |
386 | } | |
eb2bbd66 | 387 | g_dir_close(dir); |
b2c19614 BV |
388 | |
389 | return SRD_OK; | |
390 | } | |
391 | ||
b2c19614 BV |
392 | /** |
393 | * TODO | |
394 | */ | |
55c3c5f4 | 395 | SRD_API int srd_unload_all_decoders(void) |
b2c19614 BV |
396 | { |
397 | GSList *l; | |
398 | struct srd_decoder *dec; | |
399 | ||
400 | for (l = srd_list_decoders(); l; l = l->next) { | |
401 | dec = l->data; | |
b2c19614 BV |
402 | srd_unload_decoder(dec); |
403 | } | |
404 | ||
405 | return SRD_OK; | |
406 | } |