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, 7 insertions, 1 deletions

diff --git a/include/dirent.h b/include/dirent.h
index c19f7d58..b6261595 100644
--- a/include/dirent.h
+++ b/include/dirent.h
@@ -5,6 +5,12 @@
 extern "C" {
 #endif
 
+#if __STDC_VERSION__ >= 199901L
+#define __restrict restrict
+#elif !defined(__GNUC__)
+#define __restrict
+#endif
+
 #define __NEED_ino_t
 #define __NEED_off_t
 #ifdef _BSD_SOURCE
@@ -30,7 +36,7 @@ int            closedir(DIR *);
 DIR           *fdopendir(int);
 DIR           *opendir(const char *);
 struct dirent *readdir(DIR *);
-int            readdir_r(DIR *, struct dirent *, struct dirent **);
+int            readdir_r(DIR *__restrict, struct dirent *__restrict, struct dirent **__restrict);
 void           rewinddir(DIR *);
 void           seekdir(DIR *, long);
 long           telldir(DIR *);