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-rw-r--r--ext/atom.lv2/atom-helpers.h53
1 files changed, 51 insertions, 2 deletions
diff --git a/ext/atom.lv2/atom-helpers.h b/ext/atom.lv2/atom-helpers.h
index 7b9275c..883608e 100644
--- a/ext/atom.lv2/atom-helpers.h
+++ b/ext/atom.lv2/atom-helpers.h
@@ -80,11 +80,11 @@ lv2_atom_object_iter_get(LV2_Atom_Object_Iter iter)
/** Append a Property body to an Atom that contains properties (e.g. atom:Object).
* This function will write the property body (not including an LV2_Object
* header) at lv2_atom_pad_size(body + size). Thus, it can be used with any
- * Atom type that contains headerless 64-bit aligned properties.
+ * Atom type that contains headerless 32-bit aligned properties.
* @param object Pointer to the atom that contains the property to add. object.size
* must be valid, but object.type is ignored.
* @param size Must point to the size field of the container atom, and will be
- * padded up to 64 bits then increased by @a value_size.
+ * padded up to 32 bits then increased by @a value_size.
* @param body Must point to the body of the container atom.
* @return a pointer to the new LV2_Atom_Property in @a body.
*/
@@ -105,5 +105,54 @@ lv2_atom_append_property(LV2_Atom* object,
return prop;
}
+static inline bool
+lv2_atom_is_null(LV2_Atom* atom)
+{
+ return !atom || (atom->type == 0 && atom->size == 0);
+}
+
+static inline bool
+lv2_atom_is_a(LV2_Atom* object,
+ uint32_t rdf_type,
+ uint32_t atom_URIInt,
+ uint32_t atom_Object,
+ uint32_t type)
+{
+ if (lv2_atom_is_null(object)) {
+ printf("is-a null\n");
+ return false;
+ }
+
+ if (object->type == type) {
+ printf("is-a exact type\n");
+ return true;
+ }
+
+ printf("is-a rdf-type: %d int: %d object: %d type: %d\n", rdf_type, atom_URIInt, atom_Object, type);
+
+ if (object->type == atom_Object) {
+ for (LV2_Atom_Object_Iter i = lv2_atom_object_get_iter((LV2_Atom_Property*)object->body);
+ !lv2_atom_object_iter_is_end(object, i);
+ i = lv2_atom_object_iter_next(i)) {
+ LV2_Atom_Property* prop = lv2_atom_object_iter_get(i);
+ printf("is-a prop %d\n", prop->predicate);
+ if (prop->predicate == rdf_type) {
+ printf("is-a rdf:type [ type: %u size: %u ]\n", prop->object.type, prop->object.size);
+ if (prop->object.type == atom_URIInt) {
+ const uint32_t object_type = *(uint32_t*)prop->object.body;
+ printf("rdf:type is-a URIInt type: %u\n", object_type);
+ if (object_type == type)
+ return true;
+ } else {
+ fprintf(stderr, "error: rdf:type is not a URIInt\n");
+ }
+
+ }
+ }
+ }
+
+ return false;
+}
+
#endif /* LV2_ATOM_HELPERS_H */