parsers: warn about unknown input/output module option keys

[sigrok-cli.git] / parsers.c

diff --git a/parsers.c b/parsers.c
index 5ec655f78ad3dce8a05f01186a2a7ec61febb437..5652b78dc096eaf3ef95d43e63e61a6f656eb891 100644 (file)
--- a/parsers.c
+++ b/parsers.c
@@ -297,6 +297,57 @@ GHashTable *parse_generic_arg(const char *arg, gboolean sep_first)
        return hash;
 }
 
+GSList *check_unknown_keys(const struct sr_option **avail, GHashTable *used)
+{
+       GSList *unknown;
+       GHashTableIter iter;
+       void *key;
+       const char *used_id;
+       size_t avail_idx;
+       const char *avail_id, *found_id;
+
+       /* Collect a list of used but not available keywords. */
+       unknown = NULL;
+       g_hash_table_iter_init(&iter, used);
+       while (g_hash_table_iter_next(&iter, &key, NULL)) {
+               used_id = key;
+               found_id = NULL;
+               for (avail_idx = 0; avail[avail_idx] && avail[avail_idx]->id; avail_idx++) {
+                       avail_id = avail[avail_idx]->id;
+                       if (strcmp(avail_id, used_id) == 0) {
+                               found_id = avail_id;
+                               break;
+                       }
+               }
+               if (!found_id)
+                       unknown = g_slist_append(unknown, g_strdup(used_id));
+       }
+
+       /* Return the list of unknown keywords, or NULL if empty. */
+       return unknown;
+}
+
+gboolean warn_unknown_keys(const struct sr_option **avail, GHashTable *used,
+       const char *caption)
+{
+       GSList *unknown, *l;
+       gboolean had_unknown;
+       const char *s;
+
+       if (!caption || !*caption)
+               caption = "Unknown keyword";
+
+       unknown = check_unknown_keys(avail, used);
+       had_unknown = unknown != NULL;
+       for (l = unknown; l; l = l->next) {
+               s = l->data;
+               g_warning("%s: %s.", caption, s);
+       }
+       g_slist_free_full(unknown, g_free);
+
+       return had_unknown;
+}
+
 GHashTable *generic_arg_to_opt(const struct sr_option **opts, GHashTable *genargs)
 {
        GHashTable *hash;