-/* Parse a database features string from the given database version.
- * Returns the feature bit set.
- *
- * For version < 3, this ignores the features string and returns a
- * hard-coded set of features.
- *
- * If there are unrecognized features that are required to open the
- * database in mode (which should be 'r' or 'w'), return a
- * comma-separated list of unrecognized but required features in
- * *incompat_out suitable for presenting to the user. *incompat_out
- * will be allocated from ctx.
- */
-static _notmuch_features
-_parse_features (const void *ctx, const char *features, unsigned int version,
- char mode, char **incompat_out)
-{
- _notmuch_features res = static_cast<_notmuch_features>(0);
- unsigned int namelen, i;
- size_t llen = 0;
- const char *flags;
-
- /* Prior to database version 3, features were implied by the
- * version number. */
- if (version == 0)
- return NOTMUCH_FEATURES_V0;
- else if (version == 1)
- return NOTMUCH_FEATURES_V1;
- else if (version == 2)
- return NOTMUCH_FEATURES_V2;
-
- /* Parse the features string */
- while ((features = strtok_len_c (features + llen, "\n", &llen)) != NULL) {
- flags = strchr (features, '\t');
- if (! flags || flags > features + llen)
- continue;
- namelen = flags - features;
-
- for (i = 0; i < ARRAY_SIZE (feature_names); ++i) {
- if (strlen (feature_names[i].name) == namelen &&
- strncmp (feature_names[i].name, features, namelen) == 0) {
- res |= feature_names[i].value;
- break;
- }
- }
-
- if (i == ARRAY_SIZE (feature_names) && incompat_out) {
- /* Unrecognized feature */
- const char *have = strchr (flags, mode);
- if (have && have < features + llen) {
- /* This feature is required to access this database in
- * 'mode', but we don't understand it. */
- if (! *incompat_out)
- *incompat_out = talloc_strdup (ctx, "");
- *incompat_out = talloc_asprintf_append_buffer (
- *incompat_out, "%s%.*s", **incompat_out ? ", " : "",
- namelen, features);
- }
- }
- }
-
- return res;
-}
-
-static char *
-_print_features (const void *ctx, unsigned int features)
-{
- unsigned int i;
- char *res = talloc_strdup (ctx, "");
-
- for (i = 0; i < ARRAY_SIZE (feature_names); ++i)
- if (features & feature_names[i].value)
- res = talloc_asprintf_append_buffer (
- res, "%s\t%s\n", feature_names[i].name, feature_names[i].flags);
-
- return res;
-}
-
-notmuch_status_t
-notmuch_database_open (const char *path,
- notmuch_database_mode_t mode,
- notmuch_database_t **database)
-{
- char *status_string = NULL;
- notmuch_status_t status;
-
- status = notmuch_database_open_verbose (path, mode, database,
- &status_string);
-
- if (status_string) {
- fputs (status_string, stderr);
- free (status_string);
- }
-
- return status;
-}
-
-notmuch_status_t
-notmuch_database_open_verbose (const char *path,
- notmuch_database_mode_t mode,
- notmuch_database_t **database,
- char **status_string)
-{
- notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
- void *local = talloc_new (NULL);
- notmuch_database_t *notmuch = NULL;
- char *notmuch_path, *xapian_path, *incompat_features;
- char *message = NULL;
- struct stat st;
- int err;
- unsigned int i, version;
- static int initialized = 0;
-
- if (path == NULL) {
- message = strdup ("Error: Cannot open a database for a NULL path.\n");
- status = NOTMUCH_STATUS_NULL_POINTER;
- goto DONE;
- }
-
- if (path[0] != '/') {
- message = strdup ("Error: Database path must be absolute.\n");
- status = NOTMUCH_STATUS_PATH_ERROR;
- goto DONE;
- }
-
- if (! (notmuch_path = talloc_asprintf (local, "%s/%s", path, ".notmuch"))) {
- message = strdup ("Out of memory\n");
- status = NOTMUCH_STATUS_OUT_OF_MEMORY;
- goto DONE;
- }
-
- err = stat (notmuch_path, &st);
- if (err) {
- IGNORE_RESULT (asprintf (&message, "Error opening database at %s: %s\n",
- notmuch_path, strerror (errno)));
- status = NOTMUCH_STATUS_FILE_ERROR;
- goto DONE;
- }
-
- if (! (xapian_path = talloc_asprintf (local, "%s/%s", notmuch_path, "xapian"))) {
- message = strdup ("Out of memory\n");
- status = NOTMUCH_STATUS_OUT_OF_MEMORY;
- goto DONE;
- }
-
- /* Initialize the GLib type system and threads */
-#if !GLIB_CHECK_VERSION(2, 35, 1)
- g_type_init ();
-#endif
-
- /* Initialize gmime */
- if (! initialized) {
- g_mime_init (GMIME_ENABLE_RFC2047_WORKAROUNDS);
- initialized = 1;
- }
-
- notmuch = talloc_zero (NULL, notmuch_database_t);
- notmuch->exception_reported = FALSE;
- notmuch->status_string = NULL;
- notmuch->path = talloc_strdup (notmuch, path);
-
- if (notmuch->path[strlen (notmuch->path) - 1] == '/')
- notmuch->path[strlen (notmuch->path) - 1] = '\0';
-
- notmuch->mode = mode;
- notmuch->atomic_nesting = 0;
- notmuch->view = 1;
- try {
- string last_thread_id;
- string last_mod;
-
- if (mode == NOTMUCH_DATABASE_MODE_READ_WRITE) {
- notmuch->xapian_db = new Xapian::WritableDatabase (xapian_path,
- DB_ACTION);
- } else {
- notmuch->xapian_db = new Xapian::Database (xapian_path);
- }
-
- /* Check version. As of database version 3, we represent
- * changes in terms of features, so assume a version bump
- * means a dramatically incompatible change. */
- version = notmuch_database_get_version (notmuch);
- if (version > NOTMUCH_DATABASE_VERSION) {
- IGNORE_RESULT (asprintf (&message,
- "Error: Notmuch database at %s\n"
- " has a newer database format version (%u) than supported by this\n"
- " version of notmuch (%u).\n",
- notmuch_path, version, NOTMUCH_DATABASE_VERSION));
- notmuch->mode = NOTMUCH_DATABASE_MODE_READ_ONLY;
- notmuch_database_destroy (notmuch);
- notmuch = NULL;
- status = NOTMUCH_STATUS_FILE_ERROR;
- goto DONE;
- }
-
- /* Check features. */
- incompat_features = NULL;
- notmuch->features = _parse_features (
- local, notmuch->xapian_db->get_metadata ("features").c_str (),
- version, mode == NOTMUCH_DATABASE_MODE_READ_WRITE ? 'w' : 'r',
- &incompat_features);
- if (incompat_features) {
- IGNORE_RESULT (asprintf (&message,
- "Error: Notmuch database at %s\n"
- " requires features (%s)\n"
- " not supported by this version of notmuch.\n",
- notmuch_path, incompat_features));
- notmuch->mode = NOTMUCH_DATABASE_MODE_READ_ONLY;
- notmuch_database_destroy (notmuch);
- notmuch = NULL;
- status = NOTMUCH_STATUS_FILE_ERROR;
- goto DONE;
- }
-
- notmuch->last_doc_id = notmuch->xapian_db->get_lastdocid ();
- last_thread_id = notmuch->xapian_db->get_metadata ("last_thread_id");
- if (last_thread_id.empty ()) {
- notmuch->last_thread_id = 0;
- } else {
- const char *str;
- char *end;
-
- str = last_thread_id.c_str ();
- notmuch->last_thread_id = strtoull (str, &end, 16);
- if (*end != '\0')
- INTERNAL_ERROR ("Malformed database last_thread_id: %s", str);
- }
-
- /* Get current highest revision number. */
- last_mod = notmuch->xapian_db->get_value_upper_bound (
- NOTMUCH_VALUE_LAST_MOD);
- if (last_mod.empty ())
- notmuch->revision = 0;
- else
- notmuch->revision = Xapian::sortable_unserialise (last_mod);
- notmuch->uuid = talloc_strdup (
- notmuch, notmuch->xapian_db->get_uuid ().c_str ());
-
- notmuch->query_parser = new Xapian::QueryParser;
- notmuch->term_gen = new Xapian::TermGenerator;
- notmuch->term_gen->set_stemmer (Xapian::Stem ("english"));
- notmuch->value_range_processor = new Xapian::NumberValueRangeProcessor (NOTMUCH_VALUE_TIMESTAMP);
- notmuch->date_range_processor = new ParseTimeValueRangeProcessor (NOTMUCH_VALUE_TIMESTAMP);
- notmuch->last_mod_range_processor = new Xapian::NumberValueRangeProcessor (NOTMUCH_VALUE_LAST_MOD, "lastmod:");
-
- notmuch->query_parser->set_default_op (Xapian::Query::OP_AND);
- notmuch->query_parser->set_database (*notmuch->xapian_db);
- notmuch->query_parser->set_stemmer (Xapian::Stem ("english"));
- notmuch->query_parser->set_stemming_strategy (Xapian::QueryParser::STEM_SOME);
- notmuch->query_parser->add_valuerangeprocessor (notmuch->value_range_processor);
- notmuch->query_parser->add_valuerangeprocessor (notmuch->date_range_processor);
- notmuch->query_parser->add_valuerangeprocessor (notmuch->last_mod_range_processor);
-
- for (i = 0; i < ARRAY_SIZE (prefix_table); i++) {
- const prefix_t *prefix = &prefix_table[i];
- if (prefix->flags & NOTMUCH_FIELD_EXTERNAL) {
- _setup_query_field (prefix, notmuch);
- }
- }
- } catch (const Xapian::Error &error) {
- IGNORE_RESULT (asprintf (&message, "A Xapian exception occurred opening database: %s\n",
- error.get_msg().c_str()));
- notmuch_database_destroy (notmuch);
- notmuch = NULL;
- status = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
- }
-
- DONE:
- talloc_free (local);
-
- if (message) {
- if (status_string)
- *status_string = message;
- else
- free (message);
- }
-
- if (database)
- *database = notmuch;
- else
- talloc_free (notmuch);
- return status;
-}
-