sysdeps/s390/strnlen.c

   1 /* Multiple versions of strnlen.
   2    Copyright (C) 2015-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <ifunc-strnlen.h>
  20
  21 #if HAVE_STRNLEN_IFUNC
  22 # define strnlen __redirect_strnlen
  23 # define __strnlen __redirect___strnlen
  24 # include <string.h>
  25 # undef strnlen
  26 # undef __strnlen
  27 # include <ifunc-resolve.h>
  28
  29 # if HAVE_STRNLEN_C
  30 extern __typeof (__redirect_strnlen) STRNLEN_C attribute_hidden;
  31 # endif
  32
  33 # if HAVE_STRNLEN_Z13
  34 extern __typeof (__redirect_strnlen) STRNLEN_Z13 attribute_hidden;
  35 # endif
  36
  37 s390_libc_ifunc_expr (__redirect___strnlen, __strnlen,
  38                       (HAVE_STRNLEN_Z13 && (hwcap & HWCAP_S390_VX))
  39                       ? STRNLEN_Z13
  40                       : STRNLEN_DEFAULT
  41                       )
  42 weak_alias (__strnlen, strnlen)
  43 #endif /* HAVE_STRNLEN_IFUNC  */