Changeset d16fc78 in mainline for kernel/generic/include/print.h

Timestamp:

2010-11-26T01:07:42Z (14 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

855e0d8

Parents:

1e27d85

Message:

• verify the correctness of printf()'s and friends' attributes in compile time (use NVERIFY_PRINTF define to suppress the checks)
• separate non-C99 compliant printf() checks to a standalone 'print5' test and u

se NVERIFY_PRINTF for it

• improve 'print2' test (use portable constant macros and explicit types)

File:

• kernel/generic/include/print.h (modified) (1 diff)

kernel/generic/include/print.h

@@ -39 +39 @@
 #include <stdarg.h>
 
+#ifndef NVERIFY_PRINTF
+
+#define PRINTF_ATTRIBUTE(start, end) \
+        __attribute__((format(gnu_printf, start, end)))
+
+#else /* NVERIFY_PRINTF */
+
+#define PRINTF_ATTRIBUTE(start, end)
+
+#endif /* NVERIFY_PRINTF */
+
 #define EOF  (-1)
 
 extern int puts(const char *s);
-extern int printf(const char *fmt, ...);
-extern int snprintf(char *str, size_t size, const char *fmt, ...);
+extern int printf(const char *fmt, ...)
+    PRINTF_ATTRIBUTE(1, 2);
+extern int snprintf(char *str, size_t size, const char *fmt, ...)
+    PRINTF_ATTRIBUTE(3, 4);
 
 extern int vprintf(const char *fmt, va_list ap);