diff options
| author | Paul Eggert <eggert@cs.ucla.edu> | 2022-12-17 23:11:55 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2022-12-18 00:24:13 -0800 |
| commit | bda755bf92b5fa0dfe25da173b30e1002e95b774 (patch) | |
| tree | a9aa1b5520a48c93a1702b39c1b2f22a32c46805 /lib/string.in.h | |
| parent | 5a344d90c53d681ed98ab03ad3e218a3c6561108 (diff) | |
| download | emacs-bda755bf92b5fa0dfe25da173b30e1002e95b774.tar.gz | |
Update from Gnulib by running admin/merge-gnulib
Diffstat (limited to 'lib/string.in.h')
| -rw-r--r-- | lib/string.in.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/string.in.h b/lib/string.in.h index e56f6db0c9c..21356914e21 100644 --- a/lib/string.in.h +++ b/lib/string.in.h @@ -347,6 +347,23 @@ _GL_WARN_ON_USE (memrchr, "memrchr is unportable - " # endif #endif +/* Overwrite a block of memory. The compiler will not optimize + effects away, even if the block is dead after the call. */ +#if @GNULIB_MEMSET_EXPLICIT@ +# if ! @HAVE_MEMSET_EXPLICIT@ +_GL_FUNCDECL_SYS (memset_explicit, void *, + (void *__dest, int __c, size_t __n) _GL_ARG_NONNULL ((1))); +# endif +_GL_CXXALIAS_SYS (memset_explicit, void *, (void *__dest, int __c, size_t __n)); +_GL_CXXALIASWARN (memset_explicit); +#elif defined GNULIB_POSIXCHECK +# undef memset_explicit +# if HAVE_RAW_DECL_MEMSET_EXPLICIT +_GL_WARN_ON_USE (memset_explicit, "memset_explicit is unportable - " + "use gnulib module memset_explicit for portability"); +# endif +#endif + /* Find the first occurrence of C in S. More efficient than memchr(S,C,N), at the expense of undefined behavior if C does not occur within N bytes. */ |