/* PSPP - computes sample statistics.
Copyright (C) 2006 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
#define ATTRIBUTE(X)
#endif
+/* Marks a function argument as possibly not used. */
#define UNUSED ATTRIBUTE ((unused))
+
+/* Marks a function that will never return. */
#define NO_RETURN ATTRIBUTE ((noreturn))
+
+/* Mark a function as taking a printf- or scanf-like format
+ string as its FMT'th argument and that the FIRST'th argument
+ is the first one to be checked against the format string. */
#define PRINTF_FORMAT(FMT, FIRST) ATTRIBUTE ((format (printf, FMT, FIRST)))
#define SCANF_FORMAT(FMT, FIRST) ATTRIBUTE ((format (scanf, FMT, FIRST)))
-/* This attribute was added late in the GCC 2.x cycle. */
+/* Tells the compiler that a function may be treated as if any
+ non-`NULL' pointer it returns cannot alias any other pointer
+ valid when the function returns. */
#if __GNUC__ > 2
#define MALLOC_LIKE ATTRIBUTE ((malloc))
#else
#define WARN_UNUSED_RESULT
#endif
+/* This attribute indicates that the function does not examine
+ any values except its arguments, and has no effects except the
+ return value. A function that has pointer arguments and
+ examines the data pointed to must _not_ be declared
+ `const'. */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
+#define CONST_FUNCTION ATTRIBUTE ((const))
+#else
+#define CONST_FUNCTION
+#endif
+
+/* This attribute indicates that the function has no effects
+ except the return value and its return value depends only on
+ the parameters and/or global variables. */
+#if __GNUC__ > 2
+#define PURE_FUNCTION ATTRIBUTE ((pure))
+#else
+#define PURE_FUNCTION
+#endif
+
#endif /* compiler.h */