From e1ef945abd80f8f748b336ac06fd302892898f95 Mon Sep 17 00:00:00 2001
From: Fox <67861857+FluffyFoxUwU@users.noreply.github.com>
Date: Sat, 22 Jul 2023 10:55:34 +0700
Subject: [PATCH] Allow compiler to help check

Allow some compiler (GCC and Clang mainly) to check the format inputs for errors at compile time like what it does for `printf` and its family
---
 buffer.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/buffer.h b/buffer.h
index 5cecbb0..47c2f2b 100644
--- a/buffer.h
+++ b/buffer.h
@@ -60,6 +60,9 @@ buffer_prepend(buffer_t *self, char *str);
 int
 buffer_append(buffer_t *self, const char *str);
 
+#ifdef __GNUC__
+__attribute__((format(printf, 2, 3)))
+#endif
 int
 buffer_appendf(buffer_t *self, const char *format, ...);