[PATCH libinput] Add a log_msg_va function

[Hans de Goede]

This is useful for when we use libraries which want us to provide them with
a logging callback.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 src/libinput-private.h |  3 +++
 src/libinput.c         | 16 +++++++++++-----
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/libinput-private.h b/src/libinput-private.h
index ed8190d..a5f1405 100644
--- a/src/libinput-private.h
+++ b/src/libinput-private.h
@@ -97,6 +97,9 @@ typedef void (*libinput_source_dispatch_t)(void *data);
 
 void
 log_msg(enum libinput_log_priority priority, const char *format, ...);
+void
+log_msg_va(enum libinput_log_priority priority, const char *format,
+	   va_list args);
 
 int
 libinput_init(struct libinput *libinput,
diff --git a/src/libinput.c b/src/libinput.c
index 5c66159..a6d7af8 100644
--- a/src/libinput.c
+++ b/src/libinput.c
@@ -111,15 +111,21 @@ static struct log_data log_data = {
 };
 
 void
+log_msg_va(enum libinput_log_priority priority, const char *format,
+	   va_list args)
+{
+	if (log_data.handler && log_data.priority <= priority)
+		log_data.handler(priority, log_data.user_data, format, args);
+}
+
+void
 log_msg(enum libinput_log_priority priority, const char *format, ...)
 {
 	va_list args;
 
-	if (log_data.handler && log_data.priority <= priority) {
-		va_start(args, format);
-		log_data.handler(priority, log_data.user_data, format, args);
-		va_end(args);
-	}
+	va_start(args, format);
+	log_msg_va(priority, format, args);
+	va_end(args);
 }
 
 LIBINPUT_EXPORT void
-- 
2.0.0