From: Carl Worth <cworth@cworth.org>
Date: Sat, 23 Feb 2008 19:31:46 +0000 (-0800)
Subject: Add printf-like format checking
X-Git-Url: https://git.cworth.org/git?p=loudgame;a=commitdiff_plain;h=f154fbe59bd9318c58608858637731f601da1dfb

Add printf-like format checking
---

diff --git a/loudgame.h b/loudgame.h
index 08f4b49..359ecfd 100644
--- a/loudgame.h
+++ b/loudgame.h
@@ -23,6 +23,13 @@
 #include <stdarg.h>
 #include <loudmouth/loudmouth.h>
 
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
+#define LOUDGAME_PRINTF_FORMAT(fmt_index, va_index) \
+	__attribute__((__format__(__printf__, fmt_index, va_index)))
+#else
+#define LOUDGAME_PRINTF_FORMAT(fmt_index, va_index)
+#endif
+
 typedef struct _loudgame loudgame_t;
 
 typedef void (*handle_message_cb) (loudgame_t	*lg,
@@ -63,13 +70,13 @@ void
 loudgame_sendf (loudgame_t	*lg,
 		const char	*peer,
 		const char	*format,
-		...);
+		...) LOUDGAME_PRINTF_FORMAT (3, 4);
 
 void
 loudgame_vsendf (loudgame_t	*lg,
 		 const char	*peer,
 		 const char	*format,
-		 va_list	 va);
+		 va_list	 va) LOUDGAME_PRINTF_FORMAT (3, 0);
 
 void
 loudgame_broadcast (loudgame_t *lg,
@@ -78,12 +85,12 @@ loudgame_broadcast (loudgame_t *lg,
 void
 loudgame_vbroadcastf (loudgame_t *lg,
 		      const char *format,
-		      va_list     va);
+		      va_list     va) LOUDGAME_PRINTF_FORMAT (2, 0);
 
 void
 loudgame_broadcastf (loudgame_t	*lg,
 		     const char	*format,
-		     ...);
+		     ...) LOUDGAME_PRINTF_FORMAT (2, 3);
 
 void
 loudgame_quit (loudgame_t *lg, int return_value);