Mercurial > gnulib
view m4/random_r.m4 @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sat, 09 Mar 2019 20:32:25 +0100 |
| parents | b06060465f09 |
| children |
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# serial 5 dnl Copyright (C) 2008-2019 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_RANDOM_R], [ AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) AC_CHECK_HEADERS([random.h], [], [], [AC_INCLUDES_DEFAULT]) if test $ac_cv_header_random_h = no; then HAVE_RANDOM_H=0 fi AC_CHECK_TYPES([struct random_data], [], [HAVE_STRUCT_RANDOM_DATA=0], [[#include <stdlib.h> #if HAVE_RANDOM_H # include <random.h> #endif ]]) dnl On AIX and OSF/1, these functions exist, but with different declarations. dnl Override them all. case "$host_os" in aix* | osf*) REPLACE_RANDOM_R=1 ;; *) AC_CHECK_FUNCS([random_r]) if test $ac_cv_func_random_r = no; then HAVE_RANDOM_R=0 fi ;; esac ]) # Prerequisites of lib/random_r.c. AC_DEFUN([gl_PREREQ_RANDOM_R], [ : ])