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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 | /** | |
55 | * Load the session from the specified filename. | |
56 | * | |
57 | * @param filename The name of the session file to load. Must not be NULL. | |
58 | * | |
59 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, | |
60 | * SR_ERR_MALLOC upon memory allocation errors, or SR_ERR upon | |
61 | * other errors. | |
62 | */ | |
63 | SR_API int sr_session_load(const char *filename) | |
64 | { | |
65 | GKeyFile *kf; | |
66 | GPtrArray *capturefiles; | |
67 | struct zip *archive; | |
68 | struct zip_file *zf; | |
69 | struct zip_stat zs; | |
70 | struct sr_dev_inst *sdi; | |
71 | struct sr_probe *probe; | |
72 | int ret, probenum, devcnt, version, i, j; | |
73 | uint64_t tmp_u64, total_probes, enabled_probes, p; | |
74 | char **sections, **keys, *metafile, *val, s[11]; | |
75 | char probename[SR_MAX_PROBENAME_LEN + 1]; | |
76 | ||
77 | if (!filename) { | |
78 | sr_err("%s: filename was NULL", __func__); | |
79 | return SR_ERR_ARG; | |
80 | } | |
81 | ||
82 | if (!(archive = zip_open(filename, 0, &ret))) { | |
83 | sr_dbg("Failed to open session file: zip error %d", ret); | |
84 | return SR_ERR; | |
85 | } | |
86 | ||
87 | /* check "version" */ | |
88 | version = 0; | |
89 | if (!(zf = zip_fopen(archive, "version", 0))) { | |
90 | sr_dbg("Not a sigrok session file."); | |
91 | return SR_ERR; | |
92 | } | |
93 | if ((ret = zip_fread(zf, s, 10)) == -1) { | |
94 | sr_dbg("Not a valid sigrok session file."); | |
95 | return SR_ERR; | |
96 | } | |
97 | zip_fclose(zf); | |
98 | s[ret] = 0; | |
99 | version = strtoull(s, NULL, 10); | |
100 | if (version != 1) { | |
101 | sr_dbg("Not a valid sigrok session file version."); | |
102 | return SR_ERR; | |
103 | } | |
104 | ||
105 | /* read "metadata" */ | |
106 | if (zip_stat(archive, "metadata", 0, &zs) == -1) { | |
107 | sr_dbg("Not a valid sigrok session file."); | |
108 | return SR_ERR; | |
109 | } | |
110 | ||
111 | if (!(metafile = g_try_malloc(zs.size))) { | |
112 | sr_err("%s: metafile malloc failed", __func__); | |
113 | return SR_ERR_MALLOC; | |
114 | } | |
115 | ||
116 | zf = zip_fopen_index(archive, zs.index, 0); | |
117 | zip_fread(zf, metafile, zs.size); | |
118 | zip_fclose(zf); | |
119 | ||
120 | kf = g_key_file_new(); | |
121 | if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) { | |
122 | sr_dbg("Failed to parse metadata."); | |
123 | return SR_ERR; | |
124 | } | |
125 | ||
126 | sr_session_new(); | |
127 | ||
128 | devcnt = 0; | |
129 | capturefiles = g_ptr_array_new_with_free_func(g_free); | |
130 | sections = g_key_file_get_groups(kf, NULL); | |
131 | for (i = 0; sections[i]; i++) { | |
132 | if (!strcmp(sections[i], "global")) | |
133 | /* nothing really interesting in here yet */ | |
134 | continue; | |
135 | if (!strncmp(sections[i], "device ", 7)) { | |
136 | /* device section */ | |
137 | sdi = NULL; | |
138 | enabled_probes = total_probes = 0; | |
139 | keys = g_key_file_get_keys(kf, sections[i], NULL, NULL); | |
140 | for (j = 0; keys[j]; j++) { | |
141 | val = g_key_file_get_string(kf, sections[i], keys[j], NULL); | |
142 | if (!strcmp(keys[j], "capturefile")) { | |
143 | sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE, NULL, NULL, NULL); | |
144 | sdi->driver = &session_driver; | |
145 | if (devcnt == 0) | |
146 | /* first device, init the driver */ | |
147 | sdi->driver->init(NULL); | |
148 | sr_dev_open(sdi); | |
149 | sr_session_dev_add(sdi); | |
150 | sdi->driver->config_set(SR_CONF_SESSIONFILE, | |
151 | g_variant_new_string(filename), sdi); | |
152 | sdi->driver->config_set(SR_CONF_CAPTUREFILE, | |
153 | g_variant_new_string(val), sdi); | |
154 | g_ptr_array_add(capturefiles, val); | |
155 | } else if (!strcmp(keys[j], "samplerate")) { | |
156 | sr_parse_sizestring(val, &tmp_u64); | |
157 | sdi->driver->config_set(SR_CONF_SAMPLERATE, | |
158 | g_variant_new_uint64(tmp_u64), sdi); | |
159 | } else if (!strcmp(keys[j], "unitsize")) { | |
160 | tmp_u64 = strtoull(val, NULL, 10); | |
161 | sdi->driver->config_set(SR_CONF_CAPTURE_UNITSIZE, | |
162 | g_variant_new_uint64(tmp_u64), sdi); | |
163 | } else if (!strcmp(keys[j], "total probes")) { | |
164 | total_probes = strtoull(val, NULL, 10); | |
165 | sdi->driver->config_set(SR_CONF_CAPTURE_NUM_PROBES, | |
166 | g_variant_new_uint64(total_probes), sdi); | |
167 | for (p = 0; p < total_probes; p++) { | |
168 | snprintf(probename, SR_MAX_PROBENAME_LEN, "%" PRIu64, p); | |
169 | if (!(probe = sr_probe_new(p, SR_PROBE_LOGIC, TRUE, | |
170 | probename))) | |
171 | return SR_ERR; | |
172 | sdi->probes = g_slist_append(sdi->probes, probe); | |
173 | } | |
174 | } else if (!strncmp(keys[j], "probe", 5)) { | |
175 | if (!sdi) | |
176 | continue; | |
177 | enabled_probes++; | |
178 | tmp_u64 = strtoul(keys[j]+5, NULL, 10); | |
179 | /* sr_session_save() */ | |
180 | sr_dev_probe_name_set(sdi, tmp_u64 - 1, val); | |
181 | } else if (!strncmp(keys[j], "trigger", 7)) { | |
182 | probenum = strtoul(keys[j]+7, NULL, 10); | |
183 | sr_dev_trigger_set(sdi, probenum, val); | |
184 | } | |
185 | } | |
186 | g_strfreev(keys); | |
187 | /* Disable probes not specifically listed. */ | |
188 | if (total_probes) | |
189 | for (p = enabled_probes; p < total_probes; p++) | |
190 | sr_dev_probe_enable(sdi, p, FALSE); | |
191 | } | |
192 | devcnt++; | |
193 | } | |
194 | g_strfreev(sections); | |
195 | g_key_file_free(kf); | |
196 | ||
197 | return SR_OK; | |
198 | } | |
199 | ||
200 | /** | |
201 | * Save the current session to the specified file. | |
202 | * | |
203 | * @param filename The name of the filename to save the current session as. | |
204 | * Must not be NULL. | |
205 | * @param sdi The device instance from which the data was captured. | |
206 | * @param buf The data to be saved. | |
207 | * @param unitsize The number of bytes per sample. | |
208 | * @param units The number of samples. | |
209 | * | |
210 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR | |
211 | * upon other errors. | |
212 | */ | |
213 | SR_API int sr_session_save(const char *filename, const struct sr_dev_inst *sdi, | |
214 | unsigned char *buf, int unitsize, int units) | |
215 | { | |
216 | GSList *l; | |
217 | GVariant *gvar; | |
218 | FILE *meta; | |
219 | struct sr_probe *probe; | |
220 | struct zip *zipfile; | |
221 | struct zip_source *versrc, *metasrc, *logicsrc; | |
222 | int tmpfile, ret, probecnt; | |
223 | uint64_t samplerate; | |
224 | char version[1], rawname[16], metafile[32], *s; | |
225 | ||
226 | if (!filename) { | |
227 | sr_err("%s: filename was NULL", __func__); | |
228 | return SR_ERR_ARG; | |
229 | } | |
230 | ||
231 | /* Quietly delete it first, libzip wants replace ops otherwise. */ | |
232 | unlink(filename); | |
233 | if (!(zipfile = zip_open(filename, ZIP_CREATE, &ret))) | |
234 | return SR_ERR; | |
235 | ||
236 | /* "version" */ | |
237 | version[0] = '1'; | |
238 | if (!(versrc = zip_source_buffer(zipfile, version, 1, 0))) | |
239 | return SR_ERR; | |
240 | if (zip_add(zipfile, "version", versrc) == -1) { | |
241 | sr_info("error saving version into zipfile: %s", | |
242 | zip_strerror(zipfile)); | |
243 | return SR_ERR; | |
244 | } | |
245 | ||
246 | /* init "metadata" */ | |
247 | strcpy(metafile, "sigrok-meta-XXXXXX"); | |
248 | if ((tmpfile = g_mkstemp(metafile)) == -1) | |
249 | return SR_ERR; | |
250 | close(tmpfile); | |
251 | meta = g_fopen(metafile, "wb"); | |
252 | fprintf(meta, "[global]\n"); | |
253 | fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION); | |
254 | ||
255 | /* metadata */ | |
256 | fprintf(meta, "[device 1]\n"); | |
257 | if (sdi->driver) | |
258 | fprintf(meta, "driver = %s\n", sdi->driver->name); | |
259 | ||
260 | /* metadata */ | |
261 | fprintf(meta, "capturefile = logic-1\n"); | |
262 | fprintf(meta, "unitsize = %d\n", unitsize); | |
263 | fprintf(meta, "total probes = %d\n", g_slist_length(sdi->probes)); | |
264 | if (sr_dev_has_option(sdi, SR_CONF_SAMPLERATE)) { | |
265 | if (sr_config_get(sdi->driver, SR_CONF_SAMPLERATE, | |
266 | &gvar, sdi) == SR_OK) { | |
267 | samplerate = g_variant_get_uint64(gvar); | |
268 | s = sr_samplerate_string(samplerate); | |
269 | fprintf(meta, "samplerate = %s\n", s); | |
270 | g_free(s); | |
271 | g_variant_unref(gvar); | |
272 | } | |
273 | } | |
274 | probecnt = 1; | |
275 | for (l = sdi->probes; l; l = l->next) { | |
276 | probe = l->data; | |
277 | if (probe->enabled) { | |
278 | if (probe->name) | |
279 | fprintf(meta, "probe%d = %s\n", probecnt, probe->name); | |
280 | if (probe->trigger) | |
281 | fprintf(meta, " trigger%d = %s\n", probecnt, probe->trigger); | |
282 | probecnt++; | |
283 | } | |
284 | } | |
285 | ||
286 | if (!(logicsrc = zip_source_buffer(zipfile, buf, | |
287 | units * unitsize, FALSE))) | |
288 | return SR_ERR; | |
289 | snprintf(rawname, 15, "logic-1"); | |
290 | if (zip_add(zipfile, rawname, logicsrc) == -1) | |
291 | return SR_ERR; | |
292 | fclose(meta); | |
293 | ||
294 | if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1))) | |
295 | return SR_ERR; | |
296 | if (zip_add(zipfile, "metadata", metasrc) == -1) | |
297 | return SR_ERR; | |
298 | ||
299 | if ((ret = zip_close(zipfile)) == -1) { | |
300 | sr_info("error saving zipfile: %s", zip_strerror(zipfile)); | |
301 | return SR_ERR; | |
302 | } | |
303 | ||
304 | unlink(metafile); | |
305 | ||
306 | return SR_OK; | |
307 | } | |
308 | ||
309 | /** @} */ |