ir: add bt_ctf_field_path internal API

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/formats/ctf/ir/event-types.c b/formats/ctf/ir/event-types.c
index 9b78c0dbfd5b43f02b0ad9184c5b7337ba26897e..9a8ce8965b4cbaa9e8548db367c0986c305bdcaf 100644 (file)
--- a/formats/ctf/ir/event-types.c
+++ b/formats/ctf/ir/event-types.c
@@ -1955,6 +1955,56 @@ end:
        return copy;
 }
 
+BT_HIDDEN
+struct bt_ctf_field_path *bt_ctf_field_path_create(void)
+{
+       struct bt_ctf_field_path *field_path = NULL;
+
+       field_path = g_new0(struct bt_ctf_field_path, 1);
+       if (!field_path) {
+               goto end;
+       }
+
+       field_path->root = CTF_NODE_UNKNOWN;
+       field_path->path_indexes = g_array_new(TRUE, FALSE, sizeof(int));
+       if (!field_path->path_indexes) {
+               bt_ctf_field_path_destroy(field_path);
+               field_path = NULL;
+       }
+end:
+       return field_path;
+}
+
+
+BT_HIDDEN
+struct bt_ctf_field_path *bt_ctf_field_path_copy(
+               struct bt_ctf_field_path *path)
+{
+       struct bt_ctf_field_path *new_path = bt_ctf_field_path_create();
+
+       if (!new_path) {
+               goto end;
+       }
+
+       new_path->root = path->root;
+       g_array_insert_vals(new_path->path_indexes, 0,
+               path->path_indexes->data, path->path_indexes->len);
+end:
+       return new_path;
+}
+
+BT_HIDDEN
+void bt_ctf_field_path_destroy(struct bt_ctf_field_path *path)
+{
+       if (!path) {
+               return;
+       }
+
+       if (path->path_indexes) {
+               g_array_free(path->path_indexes, TRUE);
+       }
+       g_free(path);
+}
 
 BT_HIDDEN
 int bt_ctf_field_type_structure_get_field_name_index(

diff --git a/include/babeltrace/ctf-ir/event-types-internal.h b/include/babeltrace/ctf-ir/event-types-internal.h
index 8ae102b041e30c2b13936954603045bd717882f3..b420a5799fa0920d0d472db21b934774b6ba4d0f 100644 (file)
--- a/include/babeltrace/ctf-ir/event-types-internal.h
+++ b/include/babeltrace/ctf-ir/event-types-internal.h
@@ -41,6 +41,26 @@ typedef void (*type_freeze_func)(struct bt_ctf_field_type *);
 typedef int (*type_serialize_func)(struct bt_ctf_field_type *,
                struct metadata_context *);
 
+enum bt_ctf_node {
+       CTF_NODE_UNKNOWN = -1,
+       CTF_NODE_ENV = 0,
+       CTF_NODE_TRACE_PACKET_HEADER = 1,
+       CTF_NODE_STREAM_PACKET_CONTEXT = 2,
+       CTF_NODE_STREAM_EVENT_HEADER = 3,
+       CTF_NODE_STREAM_EVENT_CONTEXT = 4,
+       CTF_NODE_EVENT_CONTEXT = 5,
+       CTF_NODE_EVENT_FIELDS = 6,
+};
+
+struct bt_ctf_field_path {
+       enum bt_ctf_node root;
+       /*
+        * Array of integers (int) indicating the index in either
+        * structures or variants that make-up the path to a field.
+        */
+       GArray *path_indexes;
+};
+
 struct bt_ctf_field_type {
        struct bt_ctf_ref ref_count;
        struct bt_declaration *declaration;
@@ -165,6 +185,15 @@ BT_HIDDEN
 struct bt_ctf_field_type *bt_ctf_field_type_copy(
                struct bt_ctf_field_type *type);
 
+BT_HIDDEN
+struct bt_ctf_field_path *bt_ctf_field_path_create(void);
+
+BT_HIDDEN
+struct bt_ctf_field_path *bt_ctf_field_path_copy(
+               struct bt_ctf_field_path *path);
+
+BT_HIDDEN
+void bt_ctf_field_path_destroy(struct bt_ctf_field_path *path);
 
 BT_HIDDEN
 int bt_ctf_field_type_structure_get_field_name_index(