session_file.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2011 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 <unistd.h>
  24 #include <zip.h>
  25 #include <glib.h>
  26 #include <glib/gstdio.h>
  27 #include <sigrok.h>
  28
  29 extern struct sr_session *session;
  30 extern struct sr_device_plugin session_driver;
  31
  32
  33 int sr_session_load(const char *filename)
  34 {
  35         GKeyFile *kf;
  36         GPtrArray *capturefiles;
  37         struct zip *archive;
  38         struct zip_file *zf;
  39         struct zip_stat zs;
  40         struct sr_session *session;
  41         struct sr_device *device;
  42         struct sr_probe *probe;
  43         int ret, err, probenum, devcnt, i, j;
  44         uint64_t tmp_u64, total_probes, enabled_probes, p;
  45         char **sections, **keys, *metafile, *val, c;
  46
  47         if (!(archive = zip_open(filename, 0, &err))) {
  48                 g_debug("Failed to open session file: zip error %d", err);
  49                 return SR_ERR;
  50         }
  51
  52         /* check "version" */
  53         if (!(zf = zip_fopen(archive, "version", 0))) {
  54                 g_debug("Not a sigrok session file.");
  55                 return SR_ERR;
  56         }
  57         ret = zip_fread(zf, &c, 1);
  58         if (ret != 1 || c != '1') {
  59                 g_debug("Not a valid sigrok session file.");
  60                 return SR_ERR;
  61         }
  62         zip_fclose(zf);
  63
  64         /* read "metadata" */
  65         if (zip_stat(archive, "metadata", 0, &zs) == -1) {
  66                 g_debug("Not a valid sigrok session file.");
  67                 return SR_ERR;
  68         }
  69         metafile = g_malloc(zs.size);
  70         zf = zip_fopen_index(archive, zs.index, 0);
  71         zip_fread(zf, metafile, zs.size);
  72         zip_fclose(zf);
  73
  74         kf = g_key_file_new();
  75         if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) {
  76                 g_debug("Failed to parse metadata.");
  77                 return SR_ERR;
  78         }
  79
  80         session = sr_session_new();
  81
  82         devcnt = 0;
  83         capturefiles = g_ptr_array_new_with_free_func(g_free);
  84         sections = g_key_file_get_groups(kf, NULL);
  85         for (i = 0; sections[i]; i++) {
  86                 if (!strcmp(sections[i], "global"))
  87                         /* nothing really interesting in here yet */
  88                         continue;
  89                 if (!strncmp(sections[i], "device ", 7)) {
  90                         /* device section */
  91                         device = NULL;
  92                         enabled_probes = 0;
  93                         keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);
  94                         for (j = 0; keys[j]; j++) {
  95                                 val = g_key_file_get_string(kf, sections[i], keys[j], NULL);
  96                                 if (!strcmp(keys[j], "capturefile")) {
  97                                         device = sr_device_new(&session_driver, devcnt, 0);
  98                                         if (devcnt == 0)
  99                                                 /* first device, init the plugin */
 100                                                 device->plugin->init((char *)filename);
 101                                         sr_session_device_add(device);
 102                                         device->plugin->set_configuration(devcnt, SR_HWCAP_CAPTUREFILE, val);
 103                                         g_ptr_array_add(capturefiles, val);
 104                                 } else if (!strcmp(keys[j], "samplerate")) {
 105                                         tmp_u64 = sr_parse_sizestring(val);
 106                                         device->plugin->set_configuration(devcnt, SR_HWCAP_SAMPLERATE, &tmp_u64);
 107                                 } else if (!strcmp(keys[j], "unitsize")) {
 108                                         tmp_u64 = strtoull(val, NULL, 10);
 109                                         device->plugin->set_configuration(devcnt, SR_HWCAP_CAPTURE_UNITSIZE, &tmp_u64);
 110                                 } else if (!strcmp(keys[j], "total probes")) {
 111                                         total_probes = strtoull(val, NULL, 10);
 112                                         device->plugin->set_configuration(devcnt, SR_HWCAP_CAPTURE_NUM_PROBES, &total_probes);
 113                                         for (p = 1; p <= total_probes; p++)
 114                                                 sr_device_probe_add(device, NULL);
 115                                 } else if (!strncmp(keys[j], "probe", 5)) {
 116                                         if (!device)
 117                                                 continue;
 118                                         enabled_probes++;
 119                                         tmp_u64 = strtoul(keys[j]+5, NULL, 10);
 120                                         sr_device_probe_name(device, tmp_u64, val);
 121                                 } else if (!strncmp(keys[j], "trigger", 7)) {
 122                                         probenum = strtoul(keys[j]+7, NULL, 10);
 123                                         sr_device_trigger_set(device, probenum, val);
 124                                 }
 125                         }
 126                         g_strfreev(keys);
 127                         for (p = enabled_probes; p < total_probes; p++) {
 128                                 probe = g_slist_nth_data(device->probes, p);
 129                                 probe->enabled = FALSE;
 130                         }
 131                 }
 132         }
 133         g_strfreev(sections);
 134         g_key_file_free(kf);
 135
 136         return SR_OK;
 137 }
 138
 139 int sr_session_save(const char *filename)
 140 {
 141         GSList *l, *p, *d;
 142         FILE *meta;
 143         struct sr_device *device;
 144         struct sr_probe *probe;
 145         struct sr_datastore *ds;
 146         struct zip *zipfile;
 147         struct zip_source *versrc, *metasrc, *logicsrc;
 148         int bufcnt, devcnt, tmpfile, ret, error, probecnt;
 149         uint64_t samplerate;
 150         char version[1], rawname[16], metafile[32], *buf, *s;
 151
 152         /* Quietly delete it first, libzip wants replace ops otherwise. */
 153         unlink(filename);
 154         if (!(zipfile = zip_open(filename, ZIP_CREATE, &error)))
 155                 return SR_ERR;
 156
 157         /* "version" */
 158         version[0] = '1';
 159         if (!(versrc = zip_source_buffer(zipfile, version, 1, 0)))
 160                 return SR_ERR;
 161         if (zip_add(zipfile, "version", versrc) == -1) {
 162                 g_message("error saving version into zipfile: %s",
 163                           zip_strerror(zipfile));
 164                 return SR_ERR;
 165         }
 166
 167         /* init "metadata" */
 168         strcpy(metafile, "sigrok-meta-XXXXXX");
 169         if ((tmpfile = g_mkstemp(metafile)) == -1)
 170                 return SR_ERR;
 171         close(tmpfile);
 172         meta = g_fopen(metafile, "wb");
 173         fprintf(meta, "[global]\n");
 174         fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION);
 175         /* TODO: save protocol decoders used */
 176
 177         /* all datastores in all devices */
 178         devcnt = 1;
 179         for (l = session->devices; l; l = l->next) {
 180                 device = l->data;
 181                 /* metadata */
 182                 fprintf(meta, "[device %d]\n", devcnt);
 183                 if (device->plugin)
 184                         fprintf(meta, "driver = %s\n", device->plugin->name);
 185
 186                 ds = device->datastore;
 187                 if (ds) {
 188                         /* metadata */
 189                         fprintf(meta, "capturefile = logic-%d\n", devcnt);
 190                         fprintf(meta, "unitsize = %d\n", ds->ds_unitsize);
 191                         fprintf(meta, "total probes = %d\n", g_slist_length(device->probes));
 192                         if (sr_device_has_hwcap(device, SR_HWCAP_SAMPLERATE)) {
 193                                 samplerate = *((uint64_t *) device->plugin->get_device_info(
 194                                                 device->plugin_index, SR_DI_CUR_SAMPLERATE));
 195                                 s = sr_samplerate_string(samplerate);
 196                                 fprintf(meta, "samplerate = %s\n", s);
 197                                 free(s);
 198                         }
 199                         probecnt = 1;
 200                         for (p = device->probes; p; p = p->next) {
 201                                 probe = p->data;
 202                                 if (probe->enabled) {
 203                                         if (probe->name)
 204                                                 fprintf(meta, "probe%d = %s\n", probecnt, probe->name);
 205                                         if (probe->trigger)
 206                                                 fprintf(meta, " trigger%d = %s\n", probecnt, probe->trigger);
 207                                         probecnt++;
 208                                 }
 209                         }
 210
 211                         /* dump datastore into logic-n */
 212                         buf = malloc(ds->num_units * ds->ds_unitsize +
 213                                    DATASTORE_CHUNKSIZE);
 214                         bufcnt = 0;
 215                         for (d = ds->chunklist; d; d = d->next) {
 216                                 memcpy(buf + bufcnt, d->data,
 217                                        DATASTORE_CHUNKSIZE);
 218                                 bufcnt += DATASTORE_CHUNKSIZE;
 219                         }
 220                         if (!(logicsrc = zip_source_buffer(zipfile, buf,
 221                                        ds->num_units * ds->ds_unitsize, TRUE)))
 222                                 return SR_ERR;
 223                         snprintf(rawname, 15, "logic-%d", devcnt);
 224                         if (zip_add(zipfile, rawname, logicsrc) == -1)
 225                                 return SR_ERR;
 226                 }
 227                 devcnt++;
 228         }
 229         fclose(meta);
 230
 231         if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1)))
 232                 return SR_ERR;
 233         if (zip_add(zipfile, "metadata", metasrc) == -1)
 234                 return SR_ERR;
 235
 236         if ((ret = zip_close(zipfile)) == -1) {
 237                 g_message("error saving zipfile: %s", zip_strerror(zipfile));
 238                 return SR_ERR;
 239         }
 240
 241         unlink(metafile);
 242
 243         return SR_OK;
 244 }
 245