From 11607d56bd64c54f5a7bbdc631d96b0bb29fc8a4 Mon Sep 17 00:00:00 2001
From: rcombs <rcombs@rcombs.me>
Date: Wed, 5 May 2021 01:50:32 -0500
Subject: ass_utils: add format-string attr to ass_msg

Allows compilers to print warnings when the args we pass don't match the string
---
 libass/ass_utils.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libass/ass_utils.h b/libass/ass_utils.h
index 377d532..0743ff2 100644
--- a/libass/ass_utils.h
+++ b/libass/ass_utils.h
@@ -104,6 +104,9 @@ int numpad2align(int val);
 unsigned ass_utf8_get_char(char **str);
 unsigned ass_utf8_put_char(char *dest, uint32_t ch);
 void ass_utf16be_to_utf8(char *dst, size_t dst_size, uint8_t *src, size_t src_size);
+#ifdef __GNUC__
+    __attribute__ ((format (printf, 3, 4)))
+#endif
 void ass_msg(ASS_Library *priv, int lvl, const char *fmt, ...);
 int lookup_style(ASS_Track *track, char *name);
 ASS_Style *lookup_style_strict(ASS_Track *track, char *name, size_t len);
-- 
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