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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <string.h> | |
21 | #include <stdlib.h> | |
22 | #include <unistd.h> | |
23 | #include <zip.h> | |
24 | #include <glib.h> | |
25 | #include <glib/gstdio.h> | |
26 | #include "config.h" /* Needed for PACKAGE_VERSION and others. */ | |
27 | #include "libsigrok.h" | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | /* Message logging helpers with subsystem-specific prefix string. */ | |
31 | #define LOG_PREFIX "session-file: " | |
32 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
33 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
34 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
35 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
36 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
37 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
38 | ||
39 | /** | |
40 | * @file | |
41 | * | |
42 | * Loading and saving libsigrok session files. | |
43 | */ | |
44 | ||
45 | /** | |
46 | * @addtogroup grp_session | |
47 | * | |
48 | * @{ | |
49 | */ | |
50 | ||
51 | extern struct sr_session *session; | |
52 | extern SR_PRIV struct sr_dev_driver session_driver; | |
53 | ||
54 | /** @private */ | |
55 | SR_PRIV int sr_sessionfile_check(const char *filename) | |
56 | { | |
57 | struct zip *archive; | |
58 | struct zip_file *zf; | |
59 | struct zip_stat zs; | |
60 | int version, ret; | |
61 | char s[11]; | |
62 | ||
63 | if (!filename) | |
64 | return SR_ERR_ARG; | |
65 | ||
66 | if (!(archive = zip_open(filename, 0, &ret))) | |
67 | /* No logging: this can be used just to check if it's | |
68 | * a sigrok session file or not. */ | |
69 | return SR_ERR; | |
70 | ||
71 | /* check "version" */ | |
72 | version = 0; | |
73 | if (!(zf = zip_fopen(archive, "version", 0))) { | |
74 | sr_dbg("Not a sigrok session file: no version found."); | |
75 | return SR_ERR; | |
76 | } | |
77 | if ((ret = zip_fread(zf, s, 10)) == -1) | |
78 | return SR_ERR; | |
79 | zip_fclose(zf); | |
80 | s[ret] = 0; | |
81 | version = strtoull(s, NULL, 10); | |
82 | if (version != 1) { | |
83 | sr_dbg("Cannot handle sigrok session file version %d.", version); | |
84 | return SR_ERR; | |
85 | } | |
86 | ||
87 | /* read "metadata" */ | |
88 | if (zip_stat(archive, "metadata", 0, &zs) == -1) { | |
89 | sr_dbg("Not a valid sigrok session file."); | |
90 | return SR_ERR; | |
91 | } | |
92 | ||
93 | return SR_OK; | |
94 | } | |
95 | ||
96 | /** | |
97 | * Load the session from the specified filename. | |
98 | * | |
99 | * @param filename The name of the session file to load. Must not be NULL. | |
100 | * | |
101 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, | |
102 | * SR_ERR_MALLOC upon memory allocation errors, or SR_ERR upon | |
103 | * other errors. | |
104 | */ | |
105 | SR_API int sr_session_load(const char *filename) | |
106 | { | |
107 | GKeyFile *kf; | |
108 | GPtrArray *capturefiles; | |
109 | struct zip *archive; | |
110 | struct zip_file *zf; | |
111 | struct zip_stat zs; | |
112 | struct sr_dev_inst *sdi; | |
113 | struct sr_probe *probe; | |
114 | int ret, probenum, devcnt, i, j; | |
115 | uint64_t tmp_u64, total_probes, enabled_probes, p; | |
116 | char **sections, **keys, *metafile, *val; | |
117 | char probename[SR_MAX_PROBENAME_LEN + 1]; | |
118 | ||
119 | if ((ret = sr_sessionfile_check(filename)) != SR_OK) | |
120 | return ret; | |
121 | ||
122 | if (!(archive = zip_open(filename, 0, &ret))) | |
123 | return SR_ERR; | |
124 | ||
125 | if (zip_stat(archive, "metadata", 0, &zs) == -1) | |
126 | return SR_ERR; | |
127 | ||
128 | if (!(metafile = g_try_malloc(zs.size))) { | |
129 | sr_err("%s: metafile malloc failed", __func__); | |
130 | return SR_ERR_MALLOC; | |
131 | } | |
132 | ||
133 | zf = zip_fopen_index(archive, zs.index, 0); | |
134 | zip_fread(zf, metafile, zs.size); | |
135 | zip_fclose(zf); | |
136 | ||
137 | kf = g_key_file_new(); | |
138 | if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) { | |
139 | sr_dbg("Failed to parse metadata."); | |
140 | return SR_ERR; | |
141 | } | |
142 | ||
143 | sr_session_new(); | |
144 | ||
145 | devcnt = 0; | |
146 | capturefiles = g_ptr_array_new_with_free_func(g_free); | |
147 | sections = g_key_file_get_groups(kf, NULL); | |
148 | for (i = 0; sections[i]; i++) { | |
149 | if (!strcmp(sections[i], "global")) | |
150 | /* nothing really interesting in here yet */ | |
151 | continue; | |
152 | if (!strncmp(sections[i], "device ", 7)) { | |
153 | /* device section */ | |
154 | sdi = NULL; | |
155 | enabled_probes = total_probes = 0; | |
156 | keys = g_key_file_get_keys(kf, sections[i], NULL, NULL); | |
157 | for (j = 0; keys[j]; j++) { | |
158 | val = g_key_file_get_string(kf, sections[i], keys[j], NULL); | |
159 | if (!strcmp(keys[j], "capturefile")) { | |
160 | sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE, NULL, NULL, NULL); | |
161 | sdi->driver = &session_driver; | |
162 | if (devcnt == 0) | |
163 | /* first device, init the driver */ | |
164 | sdi->driver->init(NULL); | |
165 | sr_dev_open(sdi); | |
166 | sr_session_dev_add(sdi); | |
167 | sdi->driver->config_set(SR_CONF_SESSIONFILE, | |
168 | g_variant_new_string(filename), sdi, NULL); | |
169 | sdi->driver->config_set(SR_CONF_CAPTUREFILE, | |
170 | g_variant_new_string(val), sdi, NULL); | |
171 | g_ptr_array_add(capturefiles, val); | |
172 | } else if (!strcmp(keys[j], "samplerate")) { | |
173 | sr_parse_sizestring(val, &tmp_u64); | |
174 | sdi->driver->config_set(SR_CONF_SAMPLERATE, | |
175 | g_variant_new_uint64(tmp_u64), sdi, NULL); | |
176 | } else if (!strcmp(keys[j], "unitsize")) { | |
177 | tmp_u64 = strtoull(val, NULL, 10); | |
178 | sdi->driver->config_set(SR_CONF_CAPTURE_UNITSIZE, | |
179 | g_variant_new_uint64(tmp_u64), sdi, NULL); | |
180 | } else if (!strcmp(keys[j], "total probes")) { | |
181 | total_probes = strtoull(val, NULL, 10); | |
182 | sdi->driver->config_set(SR_CONF_CAPTURE_NUM_PROBES, | |
183 | g_variant_new_uint64(total_probes), sdi, NULL); | |
184 | for (p = 0; p < total_probes; p++) { | |
185 | snprintf(probename, SR_MAX_PROBENAME_LEN, "%" PRIu64, p); | |
186 | if (!(probe = sr_probe_new(p, SR_PROBE_LOGIC, TRUE, | |
187 | probename))) | |
188 | return SR_ERR; | |
189 | sdi->probes = g_slist_append(sdi->probes, probe); | |
190 | } | |
191 | } else if (!strncmp(keys[j], "probe", 5)) { | |
192 | if (!sdi) | |
193 | continue; | |
194 | enabled_probes++; | |
195 | tmp_u64 = strtoul(keys[j]+5, NULL, 10); | |
196 | /* sr_session_save() */ | |
197 | sr_dev_probe_name_set(sdi, tmp_u64 - 1, val); | |
198 | } else if (!strncmp(keys[j], "trigger", 7)) { | |
199 | probenum = strtoul(keys[j]+7, NULL, 10); | |
200 | sr_dev_trigger_set(sdi, probenum, val); | |
201 | } | |
202 | } | |
203 | g_strfreev(keys); | |
204 | /* Disable probes not specifically listed. */ | |
205 | if (total_probes) | |
206 | for (p = enabled_probes; p < total_probes; p++) | |
207 | sr_dev_probe_enable(sdi, p, FALSE); | |
208 | } | |
209 | devcnt++; | |
210 | } | |
211 | g_strfreev(sections); | |
212 | g_key_file_free(kf); | |
213 | ||
214 | return SR_OK; | |
215 | } | |
216 | ||
217 | /** | |
218 | * Save the current session to the specified file. | |
219 | * | |
220 | * @param filename The name of the filename to save the current session as. | |
221 | * Must not be NULL. | |
222 | * @param sdi The device instance from which the data was captured. | |
223 | * @param buf The data to be saved. | |
224 | * @param unitsize The number of bytes per sample. | |
225 | * @param units The number of samples. | |
226 | * | |
227 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR | |
228 | * upon other errors. | |
229 | */ | |
230 | SR_API int sr_session_save(const char *filename, const struct sr_dev_inst *sdi, | |
231 | unsigned char *buf, int unitsize, int units) | |
232 | { | |
233 | GSList *l; | |
234 | GVariant *gvar; | |
235 | FILE *meta; | |
236 | struct sr_probe *probe; | |
237 | struct zip *zipfile; | |
238 | struct zip_source *versrc, *metasrc, *logicsrc; | |
239 | int tmpfile, ret, probecnt; | |
240 | uint64_t samplerate; | |
241 | char version[1], rawname[16], metafile[32], *s; | |
242 | ||
243 | if (!filename) { | |
244 | sr_err("%s: filename was NULL", __func__); | |
245 | return SR_ERR_ARG; | |
246 | } | |
247 | ||
248 | /* Quietly delete it first, libzip wants replace ops otherwise. */ | |
249 | unlink(filename); | |
250 | if (!(zipfile = zip_open(filename, ZIP_CREATE, &ret))) | |
251 | return SR_ERR; | |
252 | ||
253 | /* "version" */ | |
254 | version[0] = '1'; | |
255 | if (!(versrc = zip_source_buffer(zipfile, version, 1, 0))) | |
256 | return SR_ERR; | |
257 | if (zip_add(zipfile, "version", versrc) == -1) { | |
258 | sr_info("error saving version into zipfile: %s", | |
259 | zip_strerror(zipfile)); | |
260 | return SR_ERR; | |
261 | } | |
262 | ||
263 | /* init "metadata" */ | |
264 | strcpy(metafile, "sigrok-meta-XXXXXX"); | |
265 | if ((tmpfile = g_mkstemp(metafile)) == -1) | |
266 | return SR_ERR; | |
267 | close(tmpfile); | |
268 | meta = g_fopen(metafile, "wb"); | |
269 | fprintf(meta, "[global]\n"); | |
270 | fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION); | |
271 | ||
272 | /* metadata */ | |
273 | fprintf(meta, "[device 1]\n"); | |
274 | if (sdi->driver) | |
275 | fprintf(meta, "driver = %s\n", sdi->driver->name); | |
276 | ||
277 | /* metadata */ | |
278 | fprintf(meta, "capturefile = logic-1\n"); | |
279 | fprintf(meta, "unitsize = %d\n", unitsize); | |
280 | fprintf(meta, "total probes = %d\n", g_slist_length(sdi->probes)); | |
281 | if (sr_dev_has_option(sdi, SR_CONF_SAMPLERATE)) { | |
282 | if (sr_config_get(sdi->driver, sdi, NULL, | |
283 | SR_CONF_SAMPLERATE, &gvar) == SR_OK) { | |
284 | samplerate = g_variant_get_uint64(gvar); | |
285 | s = sr_samplerate_string(samplerate); | |
286 | fprintf(meta, "samplerate = %s\n", s); | |
287 | g_free(s); | |
288 | g_variant_unref(gvar); | |
289 | } | |
290 | } | |
291 | probecnt = 1; | |
292 | for (l = sdi->probes; l; l = l->next) { | |
293 | probe = l->data; | |
294 | if (probe->enabled) { | |
295 | if (probe->name) | |
296 | fprintf(meta, "probe%d = %s\n", probecnt, probe->name); | |
297 | if (probe->trigger) | |
298 | fprintf(meta, " trigger%d = %s\n", probecnt, probe->trigger); | |
299 | probecnt++; | |
300 | } | |
301 | } | |
302 | ||
303 | if (!(logicsrc = zip_source_buffer(zipfile, buf, | |
304 | units * unitsize, FALSE))) | |
305 | return SR_ERR; | |
306 | snprintf(rawname, 15, "logic-1"); | |
307 | if (zip_add(zipfile, rawname, logicsrc) == -1) | |
308 | return SR_ERR; | |
309 | fclose(meta); | |
310 | ||
311 | if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1))) | |
312 | return SR_ERR; | |
313 | if (zip_add(zipfile, "metadata", metasrc) == -1) | |
314 | return SR_ERR; | |
315 | ||
316 | if ((ret = zip_close(zipfile)) == -1) { | |
317 | sr_info("error saving zipfile: %s", zip_strerror(zipfile)); | |
318 | return SR_ERR; | |
319 | } | |
320 | ||
321 | unlink(metafile); | |
322 | ||
323 | return SR_OK; | |
324 | } | |
325 | ||
326 | /** | |
327 | * Append data to an existing session file. | |
328 | * | |
329 | * @param filename The name of the filename to append to. Must not be NULL. | |
330 | * @param buf The data to be appended. | |
331 | * @param unitsize The number of bytes per sample. | |
332 | * @param units The number of samples. | |
333 | * | |
334 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR | |
335 | * upon other errors. | |
336 | */ | |
337 | SR_API int sr_session_append(const char *filename, unsigned char *buf, | |
338 | int unitsize, int units) | |
339 | { | |
340 | struct zip *archive; | |
341 | struct zip_source *logicsrc; | |
342 | zip_int64_t num_files; | |
343 | int chunk_num, next_chunk_num, ret, i; | |
344 | const char *entry_name; | |
345 | char chunkname[16]; | |
346 | ||
347 | if ((ret = sr_sessionfile_check(filename)) != SR_OK) | |
348 | return ret; | |
349 | ||
350 | if (!(archive = zip_open(filename, 0, &ret))) | |
351 | return SR_ERR; | |
352 | ||
353 | next_chunk_num = 1; | |
354 | num_files = zip_get_num_entries(archive, 0); | |
355 | for (i = 0; i < num_files; i++) { | |
356 | entry_name = zip_get_name(archive, i, 0); | |
357 | if (strncmp(entry_name, "logic-1", 7)) | |
358 | continue; | |
359 | if (strlen(entry_name) == 7) { | |
360 | /* This file has no extra chunks, just a single "logic-1". | |
361 | * Rename it to "logic-1-1" * and continue with chunk 2. */ | |
362 | if (zip_rename(archive, i, "logic-1-1") == -1) { | |
363 | sr_err("Failed to rename 'logic-1' to 'logic-1-1'."); | |
364 | return SR_ERR; | |
365 | } | |
366 | next_chunk_num = 2; | |
367 | break; | |
368 | } else if (strlen(entry_name) > 8 && entry_name[7] == '-') { | |
369 | chunk_num = strtoull(entry_name + 8, NULL, 10); | |
370 | if (chunk_num >= next_chunk_num) | |
371 | next_chunk_num = chunk_num + 1; | |
372 | } | |
373 | } | |
374 | snprintf(chunkname, 15, "logic-1-%d", next_chunk_num); | |
375 | if (!(logicsrc = zip_source_buffer(archive, buf, units * unitsize, FALSE))) | |
376 | return SR_ERR; | |
377 | if (zip_add(archive, chunkname, logicsrc) == -1) | |
378 | return SR_ERR; | |
379 | if ((ret = zip_close(archive)) == -1) { | |
380 | sr_info("error saving session file: %s", zip_strerror(archive)); | |
381 | return SR_ERR; | |
382 | } | |
383 | ||
384 | return SR_OK; | |
385 | } | |
386 | ||
387 | /** @} */ |