]>
Commit | Line | Data |
---|---|---|
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 <config.h> | |
21 | #include <string.h> | |
22 | #include <stdlib.h> | |
23 | #include <zip.h> | |
24 | #include <errno.h> | |
25 | #include <glib.h> | |
26 | #include <glib/gstdio.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | /** @cond PRIVATE */ | |
31 | #define LOG_PREFIX "session-file" | |
32 | /** @endcond */ | |
33 | ||
34 | /** | |
35 | * @file | |
36 | * | |
37 | * Loading and saving libsigrok session files. | |
38 | */ | |
39 | ||
40 | /** | |
41 | * @addtogroup grp_session | |
42 | * | |
43 | * @{ | |
44 | */ | |
45 | ||
46 | extern SR_PRIV struct sr_dev_driver session_driver; | |
47 | static int session_driver_initialized = 0; | |
48 | ||
49 | /** Read metadata entries from a session archive. | |
50 | * @param[in] archive An open ZIP archive. | |
51 | * @param[in] entry Stat buffer filled in for the metadata archive member. | |
52 | * @return A new key/value store containing the session metadata. | |
53 | */ | |
54 | SR_PRIV GKeyFile *sr_sessionfile_read_metadata(struct zip *archive, | |
55 | const struct zip_stat *entry) | |
56 | { | |
57 | GKeyFile *keyfile; | |
58 | GError *error; | |
59 | struct zip_file *zf; | |
60 | char *metabuf; | |
61 | int metalen; | |
62 | ||
63 | if (entry->size > G_MAXINT || !(metabuf = g_try_malloc(entry->size))) { | |
64 | sr_err("Metadata buffer allocation failed."); | |
65 | return NULL; | |
66 | } | |
67 | zf = zip_fopen_index(archive, entry->index, 0); | |
68 | if (!zf) { | |
69 | sr_err("Failed to open metadata: %s", zip_strerror(archive)); | |
70 | g_free(metabuf); | |
71 | return NULL; | |
72 | } | |
73 | metalen = zip_fread(zf, metabuf, entry->size); | |
74 | if (metalen < 0) { | |
75 | sr_err("Failed to read metadata: %s", zip_file_strerror(zf)); | |
76 | zip_fclose(zf); | |
77 | g_free(metabuf); | |
78 | return NULL; | |
79 | } | |
80 | zip_fclose(zf); | |
81 | ||
82 | keyfile = g_key_file_new(); | |
83 | error = NULL; | |
84 | g_key_file_load_from_data(keyfile, metabuf, metalen, | |
85 | G_KEY_FILE_NONE, &error); | |
86 | g_free(metabuf); | |
87 | ||
88 | if (error) { | |
89 | sr_err("Failed to parse metadata: %s", error->message); | |
90 | g_error_free(error); | |
91 | g_key_file_free(keyfile); | |
92 | return NULL; | |
93 | } | |
94 | return keyfile; | |
95 | } | |
96 | ||
97 | /** @private */ | |
98 | SR_PRIV int sr_sessionfile_check(const char *filename) | |
99 | { | |
100 | struct zip *archive; | |
101 | struct zip_file *zf; | |
102 | struct zip_stat zs; | |
103 | uint64_t version; | |
104 | int ret; | |
105 | char s[11]; | |
106 | ||
107 | if (!filename) | |
108 | return SR_ERR_ARG; | |
109 | ||
110 | if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) { | |
111 | sr_err("Not a regular file: %s.", filename); | |
112 | return SR_ERR; | |
113 | } | |
114 | ||
115 | if (!(archive = zip_open(filename, 0, NULL))) | |
116 | /* No logging: this can be used just to check if it's | |
117 | * a sigrok session file or not. */ | |
118 | return SR_ERR; | |
119 | ||
120 | /* check "version" */ | |
121 | if (!(zf = zip_fopen(archive, "version", 0))) { | |
122 | sr_dbg("Not a sigrok session file: no version found."); | |
123 | zip_discard(archive); | |
124 | return SR_ERR; | |
125 | } | |
126 | ret = zip_fread(zf, s, sizeof(s) - 1); | |
127 | if (ret < 0) { | |
128 | sr_err("Failed to read version file: %s", | |
129 | zip_file_strerror(zf)); | |
130 | zip_fclose(zf); | |
131 | zip_discard(archive); | |
132 | return SR_ERR; | |
133 | } | |
134 | zip_fclose(zf); | |
135 | s[ret] = '\0'; | |
136 | version = g_ascii_strtoull(s, NULL, 10); | |
137 | if (version == 0 || version > 2) { | |
138 | sr_dbg("Cannot handle sigrok session file version %" PRIu64 ".", | |
139 | version); | |
140 | zip_discard(archive); | |
141 | return SR_ERR; | |
142 | } | |
143 | sr_spew("Detected sigrok session file version %" PRIu64 ".", version); | |
144 | ||
145 | /* read "metadata" */ | |
146 | if (zip_stat(archive, "metadata", 0, &zs) < 0) { | |
147 | sr_dbg("Not a valid sigrok session file."); | |
148 | zip_discard(archive); | |
149 | return SR_ERR; | |
150 | } | |
151 | zip_discard(archive); | |
152 | ||
153 | return SR_OK; | |
154 | } | |
155 | ||
156 | /** | |
157 | * Load the session from the specified filename. | |
158 | * | |
159 | * @param ctx The context in which to load the session. | |
160 | * @param filename The name of the session file to load. | |
161 | * @param session The session to load the file into. | |
162 | * | |
163 | * @retval SR_OK Success | |
164 | * @retval SR_ERR_MALLOC Memory allocation error | |
165 | * @retval SR_ERR_DATA Malformed session file | |
166 | * @retval SR_ERR This is not a session file | |
167 | */ | |
168 | SR_API int sr_session_load(struct sr_context *ctx, const char *filename, | |
169 | struct sr_session **session) | |
170 | { | |
171 | GKeyFile *kf; | |
172 | GError *error; | |
173 | struct zip *archive; | |
174 | struct zip_stat zs; | |
175 | struct sr_dev_inst *sdi; | |
176 | struct sr_channel *ch; | |
177 | int ret, i, j; | |
178 | uint64_t tmp_u64; | |
179 | int total_channels, k; | |
180 | int unitsize; | |
181 | char **sections, **keys, *val; | |
182 | char channelname[SR_MAX_CHANNELNAME_LEN + 1]; | |
183 | ||
184 | if ((ret = sr_sessionfile_check(filename)) != SR_OK) | |
185 | return ret; | |
186 | ||
187 | if (!(archive = zip_open(filename, 0, NULL))) | |
188 | return SR_ERR; | |
189 | ||
190 | if (zip_stat(archive, "metadata", 0, &zs) < 0) { | |
191 | zip_discard(archive); | |
192 | return SR_ERR; | |
193 | } | |
194 | kf = sr_sessionfile_read_metadata(archive, &zs); | |
195 | zip_discard(archive); | |
196 | if (!kf) | |
197 | return SR_ERR_DATA; | |
198 | ||
199 | if ((ret = sr_session_new(ctx, session)) != SR_OK) { | |
200 | g_key_file_free(kf); | |
201 | return ret; | |
202 | } | |
203 | ||
204 | error = NULL; | |
205 | ret = SR_OK; | |
206 | sections = g_key_file_get_groups(kf, NULL); | |
207 | for (i = 0; sections[i] && ret == SR_OK; i++) { | |
208 | if (!strcmp(sections[i], "global")) | |
209 | /* nothing really interesting in here yet */ | |
210 | continue; | |
211 | if (!strncmp(sections[i], "device ", 7)) { | |
212 | /* device section */ | |
213 | sdi = NULL; | |
214 | keys = g_key_file_get_keys(kf, sections[i], NULL, NULL); | |
215 | for (j = 0; keys[j]; j++) { | |
216 | if (!strcmp(keys[j], "capturefile")) { | |
217 | val = g_key_file_get_string(kf, sections[i], | |
218 | keys[j], &error); | |
219 | if (!val) { | |
220 | ret = SR_ERR_DATA; | |
221 | break; | |
222 | } | |
223 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
224 | sdi->driver = &session_driver; | |
225 | sdi->status = SR_ST_ACTIVE; | |
226 | if (!session_driver_initialized) { | |
227 | /* first device, init the driver */ | |
228 | session_driver_initialized = 1; | |
229 | sdi->driver->init(sdi->driver, NULL); | |
230 | } | |
231 | sr_dev_open(sdi); | |
232 | sr_session_dev_add(*session, sdi); | |
233 | (*session)->owned_devs = g_slist_append( | |
234 | (*session)->owned_devs, sdi); | |
235 | sr_config_set(sdi, NULL, SR_CONF_SESSIONFILE, | |
236 | g_variant_new_string(filename)); | |
237 | sr_config_set(sdi, NULL, SR_CONF_CAPTUREFILE, | |
238 | g_variant_new_string(val)); | |
239 | g_free(val); | |
240 | } else if (!strcmp(keys[j], "samplerate")) { | |
241 | val = g_key_file_get_string(kf, sections[i], | |
242 | keys[j], &error); | |
243 | if (!sdi || !val || sr_parse_sizestring(val, | |
244 | &tmp_u64) != SR_OK) { | |
245 | g_free(val); | |
246 | ret = SR_ERR_DATA; | |
247 | break; | |
248 | } | |
249 | g_free(val); | |
250 | sr_config_set(sdi, NULL, SR_CONF_SAMPLERATE, | |
251 | g_variant_new_uint64(tmp_u64)); | |
252 | } else if (!strcmp(keys[j], "unitsize")) { | |
253 | unitsize = g_key_file_get_integer(kf, sections[i], | |
254 | keys[j], &error); | |
255 | if (!sdi || unitsize <= 0 || error) { | |
256 | ret = SR_ERR_DATA; | |
257 | break; | |
258 | } | |
259 | sr_config_set(sdi, NULL, SR_CONF_CAPTURE_UNITSIZE, | |
260 | g_variant_new_uint64(unitsize)); | |
261 | } else if (!strcmp(keys[j], "total probes")) { | |
262 | total_channels = g_key_file_get_integer(kf, | |
263 | sections[i], keys[j], &error); | |
264 | if (!sdi || total_channels < 0 || error) { | |
265 | ret = SR_ERR_DATA; | |
266 | break; | |
267 | } | |
268 | sr_config_set(sdi, NULL, SR_CONF_NUM_LOGIC_CHANNELS, | |
269 | g_variant_new_uint64(total_channels)); | |
270 | for (k = 0; k < total_channels; k++) { | |
271 | g_snprintf(channelname, sizeof channelname, | |
272 | "%d", k); | |
273 | sr_channel_new(sdi, k, SR_CHANNEL_LOGIC, | |
274 | FALSE, channelname); | |
275 | } | |
276 | } else if (!strncmp(keys[j], "probe", 5)) { | |
277 | tmp_u64 = g_ascii_strtoull(keys[j]+5, NULL, 10); | |
278 | if (!sdi || tmp_u64 == 0 || tmp_u64 > G_MAXINT) { | |
279 | ret = SR_ERR_DATA; | |
280 | break; | |
281 | } | |
282 | ch = g_slist_nth_data(sdi->channels, tmp_u64 - 1); | |
283 | if (!ch) { | |
284 | ret = SR_ERR_DATA; | |
285 | break; | |
286 | } | |
287 | val = g_key_file_get_string(kf, sections[i], | |
288 | keys[j], &error); | |
289 | if (!val) { | |
290 | ret = SR_ERR_DATA; | |
291 | break; | |
292 | } | |
293 | /* sr_session_save() */ | |
294 | sr_dev_channel_name_set(ch, val); | |
295 | g_free(val); | |
296 | sr_dev_channel_enable(ch, TRUE); | |
297 | } | |
298 | } | |
299 | g_strfreev(keys); | |
300 | } | |
301 | } | |
302 | g_strfreev(sections); | |
303 | g_key_file_free(kf); | |
304 | ||
305 | if (error) { | |
306 | sr_err("Failed to parse metadata: %s", error->message); | |
307 | g_error_free(error); | |
308 | } | |
309 | return ret; | |
310 | } | |
311 | ||
312 | /** @} */ |