sysdeps/s390/strlen.c

   1 /* Multiple versions of strlen.
   2    Copyright (C) 2015-2024 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-strlen.h>
  20
  21 #if HAVE_STRLEN_IFUNC
  22 # define strlen __redirect_strlen
  23 # include <string.h>
  24 # include <ifunc-resolve.h>
  25 # undef strlen
  26
  27 # if HAVE_STRLEN_C
  28 extern __typeof (__redirect_strlen) STRLEN_C attribute_hidden;
  29 # endif
  30
  31 # if HAVE_STRLEN_Z13
  32 extern __typeof (__redirect_strlen) STRLEN_Z13 attribute_hidden;
  33 # endif
  34
  35 s390_libc_ifunc_expr (__redirect_strlen, strlen,
  36                       (HAVE_STRLEN_Z13 && (hwcap & HWCAP_S390_VX))
  37                       ? STRLEN_Z13
  38                       : STRLEN_DEFAULT
  39                       )
  40 #endif