Mercurial > gnulib
view m4/nonblocking.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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# nonblocking.m4 serial 2 dnl Copyright (C) 2011-2019 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. dnl Tests whether non-blocking I/O is natively supported by read(), write(). dnl Sets gl_cv_have_nonblocking. dnl Also tests whether open() supports O_NONBLOCK. dnl Sets gl_cv_have_open_O_NONBLOCK. AC_DEFUN([gl_NONBLOCKING_IO], [ dnl Use AC_REQUIRE here, so that the default behavior below is expanded dnl once only, before all statements that occur in other macros. AC_REQUIRE([gl_NONBLOCKING_IO_BODY]) ]) AC_DEFUN([gl_NONBLOCKING_IO_BODY], [ AC_REQUIRE([AC_CANONICAL_HOST]) case "$host_os" in mingw*) gl_cv_have_nonblocking=no ;; *) gl_cv_have_nonblocking=yes ;; esac case "$host_os" in mingw*) gl_cv_have_open_O_NONBLOCK=no ;; *) gl_cv_have_open_O_NONBLOCK=yes ;; esac ])