use restrict everywhere it's required by c99 and/or posix 2008

to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.

1 files changed, 8 insertions, 1 deletions

diff --git a/include/search.h b/include/search.h
index 7c4fc583..680eee75 100644
--- a/include/search.h
+++ b/include/search.h
@@ -5,6 +5,13 @@
 extern "C" {
 #endif
 
+#if __STDC_VERSION__ >= 199901L
+#define __restrict restrict
+#elif !defined(__GNUC__)
+#define __restrict
+#endif
+
+
 #define __NEED_size_t
 #include <bits/alltypes.h>
 
@@ -28,7 +35,7 @@ void *lsearch(const void *, void *, size_t *, size_t,
 void *lfind(const void *, const void *, size_t *, size_t,
 	int (*)(const void *, const void *));
 
-void *tdelete(const void *, void **, int(*)(const void *, const void *));
+void *tdelete(const void *__restrict, void **__restrict, int(*)(const void *, const void *));
 void *tfind(const void *, void *const *, int(*)(const void *, const void *));
 void *tsearch(const void *, void **, int (*)(const void *, const void *));
 void twalk(const void *, void (*)(const void *, VISIT, int));