modules/rkt: variadic warpper for sync_get_track()

Preparatory commit for adding scenes and a $rkt_setup_path:scene
track for selecting them.  This will also likely replace the
whole track_name allocation/construction in rkt_pipe_t since we
don't actually make use of that name after getting the track
(except maybe for debugging purposes)

1 files changed, 22 insertions, 0 deletions

diff --git a/src/modules/rkt/rkt.c b/src/modules/rkt/rkt.c
index 77b3b49..41c47ad 100644
--- a/src/modules/rkt/rkt.c
+++ b/src/modules/rkt/rkt.c
@@ -1,3 +1,4 @@
+#include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
@@ -47,6 +48,27 @@ typedef struct rkt_setup_t {
 } rkt_setup_t;
 
 
+/* variadic helper wrapping librocket's sync_get_track() */
+static const struct sync_track * sync_get_trackf(struct sync_device *device, const char *format, ...)
+{
+	char	buf[4096];
+	size_t	len;
+	va_list	ap;
+
+	assert(device);
+	assert(format);
+
+	va_start(ap, format);
+	len = vsnprintf(buf, sizeof(buf), format, ap);
+	va_end(ap);
+
+	if (len >= sizeof(buf))
+		return NULL;
+
+	return sync_get_track(device, buf);
+}
+
+
 static til_module_context_t * rkt_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup)
 {
 	rkt_context_t		*ctxt;