string/test-ffs.c

   1 /* Copyright (C) 1994-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <support/check.h>
  22
  23 void try (const char *name, long long int param, int value, int expected)
  24 {
  25   if (value != expected)
  26     {
  27       printf ("%s(%#llx) expected %d got %d\n",
  28               name, param, expected, value);
  29       support_record_failure ();
  30     }
  31   else
  32     printf ("%s(%#llx) as expected %d\n", name, param, value);
  33 }
  34
  35 int
  36 do_test (void)
  37 {
  38   int i;
  39
  40 #define TEST(fct, type) \
  41   try (#fct, 0, fct ((type) 0), 0);                                           \
  42   for (i=0 ; i < 8 * sizeof (type); i++)                                      \
  43     try (#fct, 1ll << i, fct (((type) 1) << i), i + 1);                       \
  44   for (i=0 ; i < 8 * sizeof (type) ; i++)                                     \
  45     try (#fct, (~((type) 0) >> i) << i, fct ((~((type) 0) >> i) << i), i + 1);\
  46   try (#fct, 0x80008000, fct ((type) 0x80008000), 16)
  47
  48   TEST (ffs, int);
  49   TEST (ffsl, long int);
  50   TEST (ffsll, long long int);
  51
  52   return 0;
  53 }
  54
  55 #include <support/test-driver.c>