Add lv2_atom_object_body_get().

2 files changed, 40 insertions, 1 deletions

diff --git a/lv2/lv2plug.in/ns/ext/atom/atom.ttl b/lv2/lv2plug.in/ns/ext/atom/atom.ttl
index e7ef5a8..ef37293 100644
--- a/lv2/lv2plug.in/ns/ext/atom/atom.ttl
+++ b/lv2/lv2plug.in/ns/ext/atom/atom.ttl
@@ -29,6 +29,8 @@
 				rdfs:label "Fix implicit conversions in forge.h that are invalid in C++11."
 			] , [
 				rdfs:label "Fix lv2_atom_object_next() on 32-bit platforms."
+			] , [
+				rdfs:label "Add lv2_atom_object_body_get()."
 			]
 		]
 	] , [
diff --git a/lv2/lv2plug.in/ns/ext/atom/util.h b/lv2/lv2plug.in/ns/ext/atom/util.h
index 6ba178c..ac5eb2f 100644
--- a/lv2/lv2plug.in/ns/ext/atom/util.h
+++ b/lv2/lv2plug.in/ns/ext/atom/util.h
@@ -300,7 +300,44 @@ lv2_atom_object_query(const LV2_Atom_Object* object,
 }
 
 /**
-   Variable argument version of lv2_atom_object_get().
+   Body only version of lv2_atom_object_get().
+*/
+static inline int
+lv2_atom_object_body_get(uint32_t size, const LV2_Atom_Object_Body* body, ...)
+{
+	int matches   = 0;
+	int n_queries = 0;
+
+	/* Count number of keys so we can short-circuit when done */
+	va_list args;
+	va_start(args, body);
+	for (n_queries = 0; va_arg(args, uint32_t); ++n_queries) {
+		if (!va_arg(args, const LV2_Atom**)) {
+			return -1;
+		}
+	}
+	va_end(args);
+
+	LV2_ATOM_OBJECT_BODY_FOREACH(body, size, prop) {
+		va_start(args, body);
+		for (int i = 0; i < n_queries; ++i) {
+			uint32_t         qkey = va_arg(args, uint32_t);
+			const LV2_Atom** qval = va_arg(args, const LV2_Atom**);
+			if (qkey == prop->key && !*qval) {
+				*qval = &prop->value;
+				if (++matches == n_queries) {
+					return matches;
+				}
+				break;
+			}
+		}
+		va_end(args);
+	}
+	return matches;
+}
+
+/**
+   Variable argument version of lv2_atom_object_query().
 
    This is nicer-looking in code, but a bit more error-prone since it is not
    type safe and the argument list must be terminated.