Apply format string attribute to printf style functions

Not strictly C99 conform, but widely supported and easy enough to NOP
for compilers which do not support it. Besides it was already used to
mark certain functions as noreturn.

1 files changed, 2 insertions, 2 deletions

diff --git a/text.h b/text.h
index 8f41f08..b927e3f 100644
--- a/text.h
+++ b/text.h
@@ -40,8 +40,8 @@ typedef struct {
 Text *text_load(const char *filename);
 /* file information at time of load or last save */
 struct stat text_stat(Text*);
-bool text_appendf(Text*, const char *format, ...);
-bool text_printf(Text*, size_t pos, const char *format, ...);
+bool text_appendf(Text*, const char *format, ...) __attribute__((format(printf, 2, 3)));
+bool text_printf(Text*, size_t pos, const char *format, ...) __attribute__((format(printf, 3, 4)));
 /* inserts a line ending character (depending on file type) */
 size_t text_insert_newline(Text*, size_t pos);
 /* insert `len' bytes starting from `data' at `pos' which has to be