+/**
+ * gras_datadesc_cb_field_push:
+ *
+ * Add a pre-send callback to the given field resulting in its value to be pushed to
+ * the stack of sizes. It must be a int, unsigned int, long int or unsigned long int.
+ */
+void gras_datadesc_cb_field_push (gras_datadesc_type_t *type,
+ const char *field_name) {
+
+ gras_datadesc_type_t *sub_type=gras_dd_find_field(type,field_name);
+ if (!strcmp("int",sub_type->name)) {
+ sub_type->send = gras_datadesc_cb_push_int;
+ } else if (!strcmp("unsigned int",sub_type->name)) {
+ sub_type->send = gras_datadesc_cb_push_uint;
+ } else if (!strcmp("long int",sub_type->name)) {
+ sub_type->send = gras_datadesc_cb_push_lint;
+ } else if (!strcmp("unsigned long int",sub_type->name)) {
+ sub_type->send = gras_datadesc_cb_push_ulint;
+ } else {
+ ERROR1("Field %s is not an int, unsigned int, long int neither unsigned long int",
+ sub_type->name);
+ gras_abort();
+ }
+}
+/**
+ * gras_datadesc_cb_field_recv:
+ *
+ * Add a post-receive callback to the given field of the datadesc (which must be a struct or union).
+ * (useful to put the function pointers to the right value, for example)
+ */
+void gras_datadesc_cb_field_recv(gras_datadesc_type_t *type,
+ const char *field_name,
+ gras_datadesc_type_cb_void_t recv) {
+
+ gras_datadesc_type_t *sub_type=gras_dd_find_field(type,field_name);
+ sub_type->recv = recv;
+}
+
+/**
+ * gras_datadesc_free:
+ *
+ * Free a datadesc. Should only be called at gras_exit.
+ */
+void gras_datadesc_free(gras_datadesc_type_t *type) {
+
+ DEBUG1("Let's free ddt %s",type->name);
+
+ switch (type->category_code) {
+ case e_gras_datadesc_type_cat_scalar:
+ case e_gras_datadesc_type_cat_ref:
+ case e_gras_datadesc_type_cat_array:
+ /* nothing to free in there */
+ break;
+
+ case e_gras_datadesc_type_cat_ignored:
+ if (type->category.ignored_data.free_func) {
+ type->category.ignored_data.free_func
+ (type->category.ignored_data.default_value);