commit 75b95fa25df74fcd0498bf59e3524f20f594755d
parent 8c2352b985b1bf69efb965ba15f5e300eb7e8e12
Author: jvoisin <julien.voisin@dustri.org>
Date: Fri, 22 Sep 2023 18:27:54 +0200
Add more __diagnose_as_builtin annotations
Diffstat:
7 files changed, 144 insertions(+), 0 deletions(-)
diff --git a/include/poll.h b/include/poll.h
@@ -31,6 +31,9 @@ extern "C" {
#undef poll
+#if __has_builtin(__builtin_poll)
+__diagnose_as_builtin(__builtin_poll, 1, 2, 3)
+#endif
_FORTIFY_FN(poll) int poll(struct pollfd * _FORTIFY_POS0 __f, nfds_t __n, int __s)
{
size_t __b = __bos(__f, 0);
@@ -42,6 +45,9 @@ _FORTIFY_FN(poll) int poll(struct pollfd * _FORTIFY_POS0 __f, nfds_t __n, int __
#if defined(_GNU_SOURCE) && !_REDIR_TIME64
#undef ppoll
+#if __has_builtin(__builtin_ppoll)
+__diagnose_as_builtin(__builtin_ppoll, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(ppoll) int ppoll(struct pollfd * _FORTIFY_POS0 __f, nfds_t __n,
const struct timespec *__s, const sigset_t *__m)
{
diff --git a/include/stdio.h b/include/stdio.h
@@ -40,12 +40,18 @@ extern "C" {
#undef vsprintf
__access(read_only, 2)
+#if __has_builtin(__builtin_fdopen)
+__diagnose_as_builtin(__builtin_fdopen, 1, 2)
+#endif
_FORTIFY_FN(fdopen) FILE *fdopen(int __f, const char* _FORTIFY_POS0 __m)
{
return __orig_fdopen(__f, __m);
}
__access(write_only, 1, 2)
+#if __has_builtin(__builtin_fgets)
+__diagnose_as_builtin(__builtin_fgets, 1, 2, 3)
+#endif
_FORTIFY_FN(fgets) char *fgets(char * _FORTIFY_POS0 __s, int __n, FILE *__f)
{
size_t __b = __bos(__s, 0);
@@ -56,6 +62,9 @@ _FORTIFY_FN(fgets) char *fgets(char * _FORTIFY_POS0 __s, int __n, FILE *__f)
}
__malloc(malloc (fclose, 1))
+#if __has_builtin(__builtin_fmemopen)
+__diagnose_as_builtin(__builtin_fmemopen, 1, 2, 3)
+#endif
_FORTIFY_FN(fmemopen) FILE *fmemopen(void* _FORTIFY_POS0 __b, size_t __s, const char* _FORTIFY_POS0 __m)
{
return __orig_fmemopen(__b, __s, __m);
@@ -64,12 +73,18 @@ _FORTIFY_FN(fmemopen) FILE *fmemopen(void* _FORTIFY_POS0 __b, size_t __s, const
__access(read_only, 1)
__access(read_only, 2)
__malloc(malloc (fclose, 1))
+#if __has_builtin(__builtin_fopen)
+__diagnose_as_builtin(__builtin_fopen, 1, 2)
+#endif
_FORTIFY_FN(fopen) FILE *fopen(const char* _FORTIFY_POS0 __p, const char* _FORTIFY_POS0 __m)
{
return __orig_fopen(__p, __m);
}
__access(write_only, 1)
+#if __has_builtin(__builtin_fread)
+__diagnose_as_builtin(__builtin_fread, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(fread) size_t fread(void * _FORTIFY_POS0 __d, size_t __n,
size_t __m, FILE *__f)
{
@@ -83,6 +98,9 @@ _FORTIFY_FN(fread) size_t fread(void * _FORTIFY_POS0 __d, size_t __n,
}
__access(read_only, 1)
+#if __has_builtin(__builtin_fwrite)
+__diagnose_as_builtin(__builtin_fwrite, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(fwrite) size_t fwrite(const void * _FORTIFY_POS0 __d, size_t __n,
size_t __m, FILE *__f)
{
@@ -98,6 +116,9 @@ _FORTIFY_FN(fwrite) size_t fwrite(const void * _FORTIFY_POS0 __d, size_t __n,
__access(read_only, 1)
__access(read_only, 2)
__malloc(malloc (pclose, 1))
+#if __has_builtin(__builtin_popen)
+__diagnose_as_builtin(__builtin_popen, 1, 2)
+#endif
_FORTIFY_FN(popen) FILE *popen(const char* _FORTIFY_POS0 __c, const char* _FORTIFY_POS0 __t)
{
return __orig_popen(__c, __t);
@@ -106,6 +127,9 @@ _FORTIFY_FN(popen) FILE *popen(const char* _FORTIFY_POS0 __c, const char* _FORTI
#ifndef __clang__ /* FIXME */
#undef tmpfile
__malloc(malloc (fclose, 1))
+#if __has_builtin(__builtin_tmpfile)
+__diagnose_as_builtin(__builtin_tmpfile)
+#endif
_FORTIFY_FN(tmpfile) FILE *tmpfile(void)
{
return __orig_tmpfile();
@@ -162,6 +186,8 @@ _FORTIFY_FN(vsprintf) int vsprintf(char * _FORTIFY_POS0 __s, const char *__f,
* have the __chk variants, we'd need to implement a body with intermediate
* variables within the macro, which means more non-portable mess
* 3) not implementing these under clang, which is what we do for now
+ *
+ * TODO: add __diagnose_as_builtin
*/
#undef snprintf
diff --git a/include/stdlib.h b/include/stdlib.h
@@ -43,6 +43,9 @@ extern "C" {
__malloc(malloc (free, 1))
__alloc_size(1)
__warn_unused_result
+#if __has_builtin(__builtin_malloc)
+__diagnose_as_builtin(__builtin_malloc, 1)
+#endif
_FORTIFY_FN(malloc) void *malloc(size_t __s)
{
return __orig_malloc(__s);
@@ -50,6 +53,9 @@ _FORTIFY_FN(malloc) void *malloc(size_t __s)
__alloc_size(2)
__warn_unused_result
+#if __has_builtin(__builtin_realloc)
+__diagnose_as_builtin(__builtin_realloc, 1, 2)
+#endif
_FORTIFY_FN(realloc) void *realloc(void *__p, size_t __s)
{
return __orig_realloc(__p, __s);
@@ -57,6 +63,9 @@ _FORTIFY_FN(realloc) void *realloc(void *__p, size_t __s)
__alloc_size(1, 2)
__warn_unused_result
+#if __has_builtin(__builtin_calloc)
+__diagnose_as_builtin(__builtin_calloc, 1, 2)
+#endif
_FORTIFY_FN(calloc) void *calloc(size_t __n, size_t __s)
{
return __orig_calloc(__n, __s);
@@ -66,6 +75,9 @@ _FORTIFY_FN(calloc) void *calloc(size_t __n, size_t __s)
#undef reallocarray
__alloc_size (2, 3)
__warn_unused_result
+#if __has_builtin(__builtin_reallocarray)
+__diagnose_as_builtin(__builtin_reallocarray, 1, 2, 3)
+#endif
_FORTIFY_FN(reallocarray) void* reallocarray(void* __p, size_t __n, size_t __s)
{
return __orig_reallocarray(__p, __n, __s);
@@ -76,6 +88,9 @@ _FORTIFY_FN(reallocarray) void* reallocarray(void* __p, size_t __n, size_t __s)
#if (defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)) && !defined(__clang__)
#undef realpath
__warning_if(__p == NULL, "'realpath' called with path set to `NULL`; did you invert the arguments?")
+#if __has_builtin(__builtin_realpath)
+__diagnose_as_builtin(__builtin_realpath, 1, 2)
+#endif
_FORTIFY_FN(realpath) char *realpath(const char *__p, char *__r)
{
#ifndef PATH_MAX
diff --git a/include/string.h b/include/string.h
@@ -257,6 +257,9 @@ _FORTIFY_FN(mempcpy) void *mempcpy(void * _FORTIFY_POS0 __d,
#undef strlcpy
__access (read_write, 1)
__access (read_only, 2, 3)
+#if __has_builtin(__builtin_strlcat)
+__diagnose_as_builtin(__builtin_strlcat, 1, 2, 3)
+#endif
_FORTIFY_FN(strlcat) size_t strlcat(char * _FORTIFY_POS0 __d,
const char *__s, size_t __n)
{
@@ -269,6 +272,9 @@ _FORTIFY_FN(strlcat) size_t strlcat(char * _FORTIFY_POS0 __d,
__access (write_only, 1)
__access (read_only, 2, 3)
+#if __has_builtin(__builtin_strlcpy)
+__diagnose_as_builtin(__builtin_strlcpy, 1, 2, 3)
+#endif
_FORTIFY_FN(strlcpy) size_t strlcpy(char * _FORTIFY_POS0 __d,
const char *__s, size_t __n)
{
diff --git a/include/strings.h b/include/strings.h
@@ -33,6 +33,10 @@ extern "C" {
#undef bzero
__access(write_only, 2, 3)
__access(read_only, 1, 3)
+#if __has_builtin(__builtin_bcopy) && !defined(__clang__)
+// parameter 1 of function '__orig_bcopy' has type 'const void *', but parameter 1 of function '__builtin_bcopy' has type 'void *'
+__diagnose_as_builtin(__builtin_bcopy, 1, 2, 3)
+#endif
_FORTIFY_FN(bcopy) void bcopy(const void * _FORTIFY_POS0 __s,
void * _FORTIFY_POS0 __d, size_t __n)
{
diff --git a/include/unistd.h b/include/unistd.h
@@ -42,6 +42,9 @@ extern "C" {
#undef write
__access(write_only, 2, 3)
+#if __has_builtin(__builtin_confstr)
+__diagnose_as_builtin(__builtin_confstr, 1, 2, 3)
+#endif
_FORTIFY_FN(confstr) size_t confstr(int __n, char * _FORTIFY_POS0 __s, size_t __l)
{
size_t __b = __bos(__s, 0);
@@ -53,6 +56,9 @@ _FORTIFY_FN(confstr) size_t confstr(int __n, char * _FORTIFY_POS0 __s, size_t __
}
__access(write_only, 1, 2)
+#if __has_builtin(__builtin_getcwd)
+__diagnose_as_builtin(__builtin_getcwd, 1, 2)
+#endif
_FORTIFY_FN(getcwd) char *getcwd(char * _FORTIFY_POS0 __s, size_t __l)
{
size_t __b = __bos(__s, 0);
@@ -65,6 +71,9 @@ _FORTIFY_FN(getcwd) char *getcwd(char * _FORTIFY_POS0 __s, size_t __l)
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#undef getdomainname
__access(write_only, 1, 2)
+#if __has_builtin(__builtin_getdomainname)
+__diagnose_as_builtin(__builtin_getdomainname, 1, 2)
+#endif
_FORTIFY_FN(getdomainname) int getdomainname(char * _FORTIFY_POS0 __s, size_t __l)
{
size_t __b = __bos(__s, 0);
@@ -75,6 +84,9 @@ _FORTIFY_FN(getdomainname) int getdomainname(char * _FORTIFY_POS0 __s, size_t __
}
#endif
+#if __has_builtin(__builtin_getgroups)
+__diagnose_as_builtin(__builtin_getgroups, 1, 2)
+#endif
_FORTIFY_FN(getgroups) int getgroups(int __l, gid_t * _FORTIFY_POS0 __s)
{
size_t __b = __bos(__s, 0);
@@ -85,6 +97,9 @@ _FORTIFY_FN(getgroups) int getgroups(int __l, gid_t * _FORTIFY_POS0 __s)
}
__access(write_only, 1, 2)
+#if __has_builtin(__builtin_gethostname)
+__diagnose_as_builtin(__builtin_gethostname, 1, 2)
+#endif
_FORTIFY_FN(gethostname) int gethostname(char * _FORTIFY_POS0 __s, size_t __l)
{
size_t __b = __bos(__s, 0);
@@ -95,6 +110,9 @@ _FORTIFY_FN(gethostname) int gethostname(char * _FORTIFY_POS0 __s, size_t __l)
}
__access(write_only, 1, 2)
+#if __has_builtin(__builtin_getlogin_r)
+__diagnose_as_builtin(__builtin_getlogin_r, 1, 2)
+#endif
_FORTIFY_FN(getlogin_r) int getlogin_r(char * _FORTIFY_POS0 __s, size_t __l)
{
size_t __b = __bos(__s, 0);
@@ -104,6 +122,9 @@ _FORTIFY_FN(getlogin_r) int getlogin_r(char * _FORTIFY_POS0 __s, size_t __l)
return __orig_getlogin_r(__s, __l);
}
+#if __has_builtin(__builtin_pread)
+__diagnose_as_builtin(__builtin_pread, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(pread) ssize_t pread(int __f, void * _FORTIFY_POS0 __s,
size_t __n, off_t __o)
{
@@ -115,6 +136,9 @@ _FORTIFY_FN(pread) ssize_t pread(int __f, void * _FORTIFY_POS0 __s,
}
__access(write_only, 2, 3)
+#if __has_builtin(__builtin_read)
+__diagnose_as_builtin(__builtin_read, 1, 2, 3)
+#endif
_FORTIFY_FN(read) ssize_t read(int __f, void * _FORTIFY_POS0 __s, size_t __n)
{
size_t __b = __bos(__s, 0);
@@ -125,6 +149,9 @@ _FORTIFY_FN(read) ssize_t read(int __f, void * _FORTIFY_POS0 __s, size_t __n)
}
__access(write_only, 2, 3)
+#if __has_builtin(__builtin_readlink)
+__diagnose_as_builtin(__builtin_readlink, 1, 2, 3)
+#endif
_FORTIFY_FN(readlink) ssize_t readlink(const char *__p,
char * _FORTIFY_POS0 __s, size_t __n)
{
@@ -136,6 +163,9 @@ _FORTIFY_FN(readlink) ssize_t readlink(const char *__p,
}
__access(write_only, 3, 4)
+#if __has_builtin(__builtin_readlinkat)
+__diagnose_as_builtin(__builtin_readlinkat, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(readlinkat) ssize_t readlinkat(int __f, const char *__p,
char * _FORTIFY_POS0 __s, size_t __n)
{
@@ -147,6 +177,9 @@ _FORTIFY_FN(readlinkat) ssize_t readlinkat(int __f, const char *__p,
}
__access(write_only, 2, 3)
+#if __has_builtin(__builtin_ttyname_r)
+__diagnose_as_builtin(__builtin_ttyname_r, 1, 2, 3)
+#endif
_FORTIFY_FN(ttyname_r) int ttyname_r(int __f, char * _FORTIFY_POS0 __s,
size_t __n)
{
@@ -158,6 +191,9 @@ _FORTIFY_FN(ttyname_r) int ttyname_r(int __f, char * _FORTIFY_POS0 __s,
}
__access(read_only, 2, 3)
+#if __has_builtin(__builtin_write)
+__diagnose_as_builtin(__builtin_write, 1, 2, 3)
+#endif
_FORTIFY_FN(write) ssize_t write(int __f, const void * _FORTIFY_POS0 __s,
size_t __n)
{
@@ -168,6 +204,9 @@ _FORTIFY_FN(write) ssize_t write(int __f, const void * _FORTIFY_POS0 __s,
return __orig_write(__f, __s, __n);
}
+#if __has_builtin(__builtin_pwrite)
+__diagnose_as_builtin(__builtin_pwrite, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(pwrite) ssize_t pwrite(int __f, const void * _FORTIFY_POS0 __s,
size_t __n, off_t __o)
{
diff --git a/include/wchar.h b/include/wchar.h
@@ -56,6 +56,9 @@ extern "C" {
#undef wmemmove
#undef wmemset
+#if __has_builtin(__builtin_fgetws)
+__diagnose_as_builtin(__builtin_fgetws, 1, 2, 3)
+#endif
_FORTIFY_FN(fgetws) wchar_t *fgetws(wchar_t * _FORTIFY_POS0 __s,
int __n, FILE *__f)
{
@@ -69,6 +72,9 @@ _FORTIFY_FN(fgetws) wchar_t *fgetws(wchar_t * _FORTIFY_POS0 __s,
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#undef mbsnrtowcs
+#if __has_builtin(__builtin_mbsnrtowcs)
+__diagnose_as_builtin(__builtin_mbsnrtowcs, 1, 2, 3, 4, 5)
+#endif
_FORTIFY_FN(mbsnrtowcs) size_t mbsnrtowcs(wchar_t * _FORTIFY_POS0 __d,
const char **__s, size_t __n,
size_t __wn, mbstate_t *__st)
@@ -90,6 +96,9 @@ _FORTIFY_FN(mbsnrtowcs) size_t mbsnrtowcs(wchar_t * _FORTIFY_POS0 __d,
}
#endif
+#if __has_builtin(__builtin_mbsrtowcs)
+__diagnose_as_builtin(__builtin_mbsrtowcs, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(mbsrtowcs) size_t mbsrtowcs(wchar_t * _FORTIFY_POS0 __d,
const char **__s, size_t __wn,
mbstate_t *__st)
@@ -104,6 +113,9 @@ _FORTIFY_FN(mbsrtowcs) size_t mbsrtowcs(wchar_t * _FORTIFY_POS0 __d,
return __r;
}
+#if __has_builtin(__builtin_mbstowcs)
+__diagnose_as_builtin(__builtin_mbstowcs, 1, 2, 3)
+#endif
_FORTIFY_FN(mbstowcs) size_t mbstowcs(wchar_t * _FORTIFY_POS0 __ws,
const char *__s, size_t __wn)
{
@@ -116,6 +128,9 @@ _FORTIFY_FN(mbstowcs) size_t mbstowcs(wchar_t * _FORTIFY_POS0 __ws,
/* FIXME clang */
#ifndef __clang__
+#if __has_builtin(__builtin_wcrtomb)
+__diagnose_as_builtin(__builtin_wcrtomb, 1, 2, 3)
+#endif
_FORTIFY_FN(wcrtomb) size_t wcrtomb(char * __s, wchar_t __w, mbstate_t *__st)
{
if (__s && MB_LEN_MAX > __bos(__s, 2)) {
@@ -134,6 +149,9 @@ _FORTIFY_FN(wcrtomb) size_t wcrtomb(char * __s, wchar_t __w, mbstate_t *__st)
}
#endif
+#if __has_builtin(__builtin_wcscat)
+__diagnose_as_builtin(__builtin_wcscat, 1, 2)
+#endif
_FORTIFY_FN(wcscat) wchar_t *wcscat(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s)
{
@@ -144,6 +162,9 @@ _FORTIFY_FN(wcscat) wchar_t *wcscat(wchar_t * _FORTIFY_POS0 __d,
return __orig_wcscat(__d, __s);
}
+#if __has_builtin(__builtin_wcscpy)
+__diagnose_as_builtin(__builtin_wcscpy, 1, 2)
+#endif
_FORTIFY_FN(wcscpy) wchar_t *wcscpy(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s)
{
@@ -154,6 +175,9 @@ _FORTIFY_FN(wcscpy) wchar_t *wcscpy(wchar_t * _FORTIFY_POS0 __d,
return __orig_wcscpy(__d, __s);
}
+#if __has_builtin(__builtin_wcsncat)
+__diagnose_as_builtin(__builtin_wcsncat, 1, 2, 3)
+#endif
_FORTIFY_FN(wcsncat) wchar_t *wcsncat(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s, size_t __n)
{
@@ -171,6 +195,9 @@ _FORTIFY_FN(wcsncat) wchar_t *wcsncat(wchar_t * _FORTIFY_POS0 __d,
return __orig_wcsncat(__d, __s, __n);
}
+#if __has_builtin(__builtin_wcsncpy)
+__diagnose_as_builtin(__builtin_wcsncpy, 1, 2, 3)
+#endif
_FORTIFY_FN(wcsncpy) wchar_t *wcsncpy(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s, size_t __n)
{
@@ -184,6 +211,9 @@ _FORTIFY_FN(wcsncpy) wchar_t *wcsncpy(wchar_t * _FORTIFY_POS0 __d,
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#undef wcsnrtombs
+#if __has_builtin(__builtin_wcsnrtombs)
+__diagnose_as_builtin(__builtin_wcsnrtombs, 1, 2, 3, 4, 5)
+#endif
_FORTIFY_FN(wcsnrtombs) size_t wcsnrtombs(char * _FORTIFY_POS0 __d,
const wchar_t **__s, size_t __wn,
size_t __n, mbstate_t *__st)
@@ -205,6 +235,9 @@ _FORTIFY_FN(wcsnrtombs) size_t wcsnrtombs(char * _FORTIFY_POS0 __d,
}
#endif
+#if __has_builtin(__builtin_wcsrtombs)
+__diagnose_as_builtin(__builtin_wcsrtombs, 1, 2, 3, 4)
+#endif
_FORTIFY_FN(wcsrtombs) size_t wcsrtombs(char * _FORTIFY_POS0 __d,
const wchar_t **__s, size_t __n,
mbstate_t *__st)
@@ -219,6 +252,9 @@ _FORTIFY_FN(wcsrtombs) size_t wcsrtombs(char * _FORTIFY_POS0 __d,
}
__access(write_only, 1, 3)
+#if __has_builtin(__builtin_wcstombs)
+__diagnose_as_builtin(__builtin_wcstombs, 1, 2, 3)
+#endif
_FORTIFY_FN(wcstombs) size_t wcstombs(char * _FORTIFY_POS0 __s,
const wchar_t *__ws, size_t __n)
{
@@ -229,6 +265,9 @@ _FORTIFY_FN(wcstombs) size_t wcstombs(char * _FORTIFY_POS0 __s,
return __orig_wcstombs(__s, __ws, __n);
}
+#if __has_builtin(__builtin_wctomb)
+__diagnose_as_builtin(__builtin_wctomb, 1, 2)
+#endif
_FORTIFY_FN(wctomb) int wctomb(char * _FORTIFY_POS0 __s, wchar_t __w)
{
size_t __b = __bos(__s, 0);
@@ -238,6 +277,9 @@ _FORTIFY_FN(wctomb) int wctomb(char * _FORTIFY_POS0 __s, wchar_t __w)
return __orig_wctomb(__s, __w);
}
+#if __has_builtin(__builtin_wmemcpy)
+__diagnose_as_builtin(__builtin_wmemcpy, 1, 2, 3)
+#endif
_FORTIFY_FN(wmemcpy) wchar_t *wmemcpy(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s, size_t __n)
{
@@ -248,6 +290,9 @@ _FORTIFY_FN(wmemcpy) wchar_t *wmemcpy(wchar_t * _FORTIFY_POS0 __d,
return __orig_wmemcpy(__d, __s, __n);
}
+#if __has_builtin(__builtin_wmemmove)
+__diagnose_as_builtin(__builtin_wmemmove, 1, 2, 3)
+#endif
_FORTIFY_FN(wmemmove) wchar_t *wmemmove(wchar_t * _FORTIFY_POS0 __d,
const wchar_t *__s, size_t __n)
{
@@ -258,6 +303,9 @@ _FORTIFY_FN(wmemmove) wchar_t *wmemmove(wchar_t * _FORTIFY_POS0 __d,
return __orig_wmemmove(__d, __s, __n);
}
+#if __has_builtin(__builtin_wmemset)
+__diagnose_as_builtin(__builtin_wmemset, 1, 2, 3)
+#endif
_FORTIFY_FN(wmemset) wchar_t *wmemset(wchar_t * _FORTIFY_POS0 __s,
wchar_t __c, size_t __n)
{
