session_file.c

   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 <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <errno.h>
  27 #include <glib.h>
  28 #include <glib/gstdio.h>
  29 #include "config.h" /* Needed for PACKAGE_VERSION and others. */
  30 #include "libsigrok.h"
  31 #include "libsigrok-internal.h"
  32
  33 #define LOG_PREFIX "session-file"
  34
  35 /**
  36  * @file
  37  *
  38  * Loading and saving libsigrok session files.
  39  */
  40
  41 /**
  42  * @addtogroup grp_session
  43  *
  44  * @{
  45  */
  46
  47 extern struct sr_session *session;
  48 extern SR_PRIV struct sr_dev_driver session_driver;
  49
  50 /** @private */
  51 SR_PRIV int sr_sessionfile_check(const char *filename)
  52 {
  53         struct stat st;
  54         struct zip *archive;
  55         struct zip_file *zf;
  56         struct zip_stat zs;
  57         int version, ret;
  58         char s[11];
  59
  60         if (!filename)
  61                 return SR_ERR_ARG;
  62
  63         if (stat(filename, &st) == -1) {
  64                 sr_err("Couldn't stat %s: %s", filename, strerror(errno));
  65                 return SR_ERR;
  66         }
  67
  68         if (!(archive = zip_open(filename, 0, &ret)))
  69                 /* No logging: this can be used just to check if it's
  70                  * a sigrok session file or not. */
  71                 return SR_ERR;
  72
  73         /* check "version" */
  74         version = 0;
  75         if (!(zf = zip_fopen(archive, "version", 0))) {
  76                 sr_dbg("Not a sigrok session file: no version found.");
  77                 return SR_ERR;
  78         }
  79         if ((ret = zip_fread(zf, s, 10)) == -1)
  80                 return SR_ERR;
  81         zip_fclose(zf);
  82         s[ret] = 0;
  83         version = strtoull(s, NULL, 10);
  84         if (version != 1) {
  85                 sr_dbg("Cannot handle sigrok session file version %d.", version);
  86                 return SR_ERR;
  87         }
  88
  89         /* read "metadata" */
  90         if (zip_stat(archive, "metadata", 0, &zs) == -1) {
  91                 sr_dbg("Not a valid sigrok session file.");
  92                 return SR_ERR;
  93         }
  94
  95         return SR_OK;
  96 }
  97
  98 /**
  99  * Load the session from the specified filename.
 100  *
 101  * @param filename The name of the session file to load. Must not be NULL.
 102  *
 103  * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments,
 104  *         SR_ERR_MALLOC upon memory allocation errors, or SR_ERR upon
 105  *         other errors.
 106  */
 107 SR_API int sr_session_load(const char *filename)
 108 {
 109         GKeyFile *kf;
 110         GPtrArray *capturefiles;
 111         struct zip *archive;
 112         struct zip_file *zf;
 113         struct zip_stat zs;
 114         struct sr_dev_inst *sdi;
 115         struct sr_probe *probe;
 116         int ret, probenum, devcnt, i, j;
 117         uint64_t tmp_u64, total_probes, enabled_probes, p;
 118         char **sections, **keys, *metafile, *val;
 119         char probename[SR_MAX_PROBENAME_LEN + 1];
 120
 121         if ((ret = sr_sessionfile_check(filename)) != SR_OK)
 122                 return ret;
 123
 124         if (!(archive = zip_open(filename, 0, &ret)))
 125                 return SR_ERR;
 126
 127         if (zip_stat(archive, "metadata", 0, &zs) == -1)
 128                 return SR_ERR;
 129
 130         if (!(metafile = g_try_malloc(zs.size))) {
 131                 sr_err("%s: metafile malloc failed", __func__);
 132                 return SR_ERR_MALLOC;
 133         }
 134
 135         zf = zip_fopen_index(archive, zs.index, 0);
 136         zip_fread(zf, metafile, zs.size);
 137         zip_fclose(zf);
 138
 139         kf = g_key_file_new();
 140         if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) {
 141                 sr_dbg("Failed to parse metadata.");
 142                 return SR_ERR;
 143         }
 144
 145         sr_session_new();
 146
 147         devcnt = 0;
 148         capturefiles = g_ptr_array_new_with_free_func(g_free);
 149         sections = g_key_file_get_groups(kf, NULL);
 150         for (i = 0; sections[i]; i++) {
 151                 if (!strcmp(sections[i], "global"))
 152                         /* nothing really interesting in here yet */
 153                         continue;
 154                 if (!strncmp(sections[i], "device ", 7)) {
 155                         /* device section */
 156                         sdi = NULL;
 157                         enabled_probes = total_probes = 0;
 158                         keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);
 159                         for (j = 0; keys[j]; j++) {
 160                                 val = g_key_file_get_string(kf, sections[i], keys[j], NULL);
 161                                 if (!strcmp(keys[j], "capturefile")) {
 162                                         sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE, NULL, NULL, NULL);
 163                                         sdi->driver = &session_driver;
 164                                         if (devcnt == 0)
 165                                                 /* first device, init the driver */
 166                                                 sdi->driver->init(NULL);
 167                                         sr_dev_open(sdi);
 168                                         sr_session_dev_add(sdi);
 169                                         sdi->driver->config_set(SR_CONF_SESSIONFILE,
 170                                                         g_variant_new_string(filename), sdi, NULL);
 171                                         sdi->driver->config_set(SR_CONF_CAPTUREFILE,
 172                                                         g_variant_new_string(val), sdi, NULL);
 173                                         g_ptr_array_add(capturefiles, val);
 174                                 } else if (!strcmp(keys[j], "samplerate")) {
 175                                         sr_parse_sizestring(val, &tmp_u64);
 176                                         sdi->driver->config_set(SR_CONF_SAMPLERATE,
 177                                                         g_variant_new_uint64(tmp_u64), sdi, NULL);
 178                                 } else if (!strcmp(keys[j], "unitsize")) {
 179                                         tmp_u64 = strtoull(val, NULL, 10);
 180                                         sdi->driver->config_set(SR_CONF_CAPTURE_UNITSIZE,
 181                                                         g_variant_new_uint64(tmp_u64), sdi, NULL);
 182                                 } else if (!strcmp(keys[j], "total probes")) {
 183                                         total_probes = strtoull(val, NULL, 10);
 184                                         sdi->driver->config_set(SR_CONF_NUM_LOGIC_PROBES,
 185                                                         g_variant_new_uint64(total_probes), sdi, NULL);
 186                                         for (p = 0; p < total_probes; p++) {
 187                                                 snprintf(probename, SR_MAX_PROBENAME_LEN, "%" PRIu64, p);
 188                                                 if (!(probe = sr_probe_new(p, SR_PROBE_LOGIC, TRUE,
 189                                                                 probename)))
 190                                                         return SR_ERR;
 191                                                 sdi->probes = g_slist_append(sdi->probes, probe);
 192                                         }
 193                                 } else if (!strncmp(keys[j], "probe", 5)) {
 194                                         if (!sdi)
 195                                                 continue;
 196                                         enabled_probes++;
 197                                         tmp_u64 = strtoul(keys[j]+5, NULL, 10);
 198                                         /* sr_session_save() */
 199                                         sr_dev_probe_name_set(sdi, tmp_u64 - 1, val);
 200                                 } else if (!strncmp(keys[j], "trigger", 7)) {
 201                                         probenum = strtoul(keys[j]+7, NULL, 10);
 202                                         sr_dev_trigger_set(sdi, probenum, val);
 203                                 }
 204                         }
 205                         g_strfreev(keys);
 206                         /* Disable probes not specifically listed. */
 207                         if (total_probes)
 208                                 for (p = enabled_probes; p < total_probes; p++)
 209                                         sr_dev_probe_enable(sdi, p, FALSE);
 210                 }
 211                 devcnt++;
 212         }
 213         g_strfreev(sections);
 214         g_key_file_free(kf);
 215
 216         return SR_OK;
 217 }
 218
 219 /**
 220  * Save the current session to the specified file.
 221  *
 222  * @param filename The name of the filename to save the current session as.
 223  *                 Must not be NULL.
 224  * @param sdi The device instance from which the data was captured.
 225  * @param buf The data to be saved.
 226  * @param unitsize The number of bytes per sample.
 227  * @param units The number of samples.
 228  *
 229  * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
 230  *         upon other errors.
 231  */
 232 SR_API int sr_session_save(const char *filename, const struct sr_dev_inst *sdi,
 233                 unsigned char *buf, int unitsize, int units)
 234 {
 235         GSList *l;
 236         GVariant *gvar;
 237         FILE *meta;
 238         struct sr_probe *probe;
 239         struct zip *zipfile;
 240         struct zip_source *versrc, *metasrc, *logicsrc;
 241         int tmpfile, ret, probecnt;
 242         uint64_t samplerate;
 243         char version[1], rawname[16], metafile[32], *s;
 244
 245         if (!filename) {
 246                 sr_err("%s: filename was NULL", __func__);
 247                 return SR_ERR_ARG;
 248         }
 249
 250         /* Quietly delete it first, libzip wants replace ops otherwise. */
 251         unlink(filename);
 252         if (!(zipfile = zip_open(filename, ZIP_CREATE, &ret)))
 253                 return SR_ERR;
 254
 255         /* "version" */
 256         version[0] = '1';
 257         if (!(versrc = zip_source_buffer(zipfile, version, 1, 0)))
 258                 return SR_ERR;
 259         if (zip_add(zipfile, "version", versrc) == -1) {
 260                 sr_info("error saving version into zipfile: %s",
 261                         zip_strerror(zipfile));
 262                 return SR_ERR;
 263         }
 264
 265         /* init "metadata" */
 266         strcpy(metafile, "sigrok-meta-XXXXXX");
 267         if ((tmpfile = g_mkstemp(metafile)) == -1)
 268                 return SR_ERR;
 269         close(tmpfile);
 270         meta = g_fopen(metafile, "wb");
 271         fprintf(meta, "[global]\n");
 272         fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION);
 273
 274         /* metadata */
 275         fprintf(meta, "[device 1]\n");
 276         if (sdi->driver)
 277                 fprintf(meta, "driver = %s\n", sdi->driver->name);
 278
 279         /* metadata */
 280         fprintf(meta, "capturefile = logic-1\n");
 281         fprintf(meta, "unitsize = %d\n", unitsize);
 282         fprintf(meta, "total probes = %d\n", g_slist_length(sdi->probes));
 283         if (sr_dev_has_option(sdi, SR_CONF_SAMPLERATE)) {
 284                 if (sr_config_get(sdi->driver, sdi, NULL,
 285                                         SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
 286                         samplerate = g_variant_get_uint64(gvar);
 287                         s = sr_samplerate_string(samplerate);
 288                         fprintf(meta, "samplerate = %s\n", s);
 289                         g_free(s);
 290                         g_variant_unref(gvar);
 291                 }
 292         }
 293         probecnt = 1;
 294         for (l = sdi->probes; l; l = l->next) {
 295                 probe = l->data;
 296                 if (probe->enabled) {
 297                         if (probe->name)
 298                                 fprintf(meta, "probe%d = %s\n", probecnt, probe->name);
 299                         if (probe->trigger)
 300                                 fprintf(meta, " trigger%d = %s\n", probecnt, probe->trigger);
 301                         probecnt++;
 302                 }
 303         }
 304
 305         if (!(logicsrc = zip_source_buffer(zipfile, buf,
 306                            units * unitsize, FALSE)))
 307                 return SR_ERR;
 308         snprintf(rawname, 15, "logic-1");
 309         if (zip_add(zipfile, rawname, logicsrc) == -1)
 310                 return SR_ERR;
 311         fclose(meta);
 312
 313         if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1)))
 314                 return SR_ERR;
 315         if (zip_add(zipfile, "metadata", metasrc) == -1)
 316                 return SR_ERR;
 317
 318         if ((ret = zip_close(zipfile)) == -1) {
 319                 sr_info("error saving zipfile: %s", zip_strerror(zipfile));
 320                 return SR_ERR;
 321         }
 322
 323         unlink(metafile);
 324
 325         return SR_OK;
 326 }
 327
 328 /**
 329  * Append data to an existing session file.
 330  *
 331  * @param filename The name of the filename to append to. Must not be NULL.
 332  * @param buf The data to be appended.
 333  * @param unitsize The number of bytes per sample.
 334  * @param units The number of samples.
 335  *
 336  * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
 337  *         upon other errors.
 338  */
 339 SR_API int sr_session_append(const char *filename, unsigned char *buf,
 340                 int unitsize, int units)
 341 {
 342         struct zip *archive;
 343         struct zip_source *logicsrc;
 344         zip_int64_t num_files;
 345         int chunk_num, next_chunk_num, ret, i;
 346         const char *entry_name;
 347         char chunkname[16];
 348
 349         if ((ret = sr_sessionfile_check(filename)) != SR_OK)
 350                 return ret;
 351
 352         if (!(archive = zip_open(filename, 0, &ret)))
 353                 return SR_ERR;
 354
 355         next_chunk_num = 1;
 356         num_files = zip_get_num_entries(archive, 0);
 357         for (i = 0; i < num_files; i++) {
 358                 entry_name = zip_get_name(archive, i, 0);
 359                 if (strncmp(entry_name, "logic-1", 7))
 360                         continue;
 361                 if (strlen(entry_name) == 7) {
 362                         /* This file has no extra chunks, just a single "logic-1".
 363                          * Rename it to "logic-1-1" * and continue with chunk 2. */
 364                         if (zip_rename(archive, i, "logic-1-1") == -1) {
 365                                 sr_err("Failed to rename 'logic-1' to 'logic-1-1'.");
 366                                 return SR_ERR;
 367                         }
 368                         next_chunk_num = 2;
 369                         break;
 370                 } else if (strlen(entry_name) > 8 && entry_name[7] == '-') {
 371                         chunk_num = strtoull(entry_name + 8, NULL, 10);
 372                         if (chunk_num >= next_chunk_num)
 373                                 next_chunk_num = chunk_num + 1;
 374                 }
 375         }
 376         snprintf(chunkname, 15, "logic-1-%d", next_chunk_num);
 377         if (!(logicsrc = zip_source_buffer(archive, buf, units * unitsize, FALSE)))
 378                 return SR_ERR;
 379         if (zip_add(archive, chunkname, logicsrc) == -1)
 380                 return SR_ERR;
 381         if ((ret = zip_close(archive)) == -1) {
 382                 sr_info("error saving session file: %s", zip_strerror(archive));
 383                 return SR_ERR;
 384         }
 385
 386         return SR_OK;
 387 }
 388
 389 /** @} */