math/test-signgam-main.c

   1 /* Test lgamma functions do not set signgam for ISO C.
   2    Copyright (C) 2015-2023 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 #undef _LIBC
  20 #undef _GNU_SOURCE
  21
  22 #include <math.h>
  23 #include <stdio.h>
  24
  25 #define INITVAL ((TYPE) -1 / 3)
  26
  27 #if DO_INIT
  28 TYPE signgam = INITVAL;
  29 #else
  30 TYPE signgam;
  31 #endif
  32
  33 #define RUN_TESTS(FUNC, TYPE)                                   \
  34   do                                                            \
  35     {                                                           \
  36       volatile TYPE a, b, c __attribute__ ((unused));           \
  37       a = 0.5;                                                  \
  38       b = -0.5;                                                 \
  39       signgam = INITVAL;                                        \
  40       c = FUNC (a);                                             \
  41       if (signgam == INITVAL)                                   \
  42         puts ("PASS: " #FUNC " (0.5) setting signgam");         \
  43       else                                                      \
  44         {                                                       \
  45           puts ("FAIL: " #FUNC " (0.5) setting signgam");       \
  46           result = 1;                                           \
  47         }                                                       \
  48       signgam = INITVAL;                                        \
  49       c = FUNC (b);                                             \
  50       if (signgam == INITVAL)                                   \
  51         puts ("PASS: " #FUNC " (-0.5) setting signgam");        \
  52       else                                                      \
  53         {                                                       \
  54           puts ("FAIL: " #FUNC " (-0.5) setting signgam");      \
  55           result = 1;                                           \
  56         }                                                       \
  57     }                                                           \
  58   while (0)
  59
  60 int
  61 main (void)
  62 {
  63   int result = 0;
  64   RUN_TESTS (lgammaf, float);
  65   RUN_TESTS (lgamma, double);
  66   RUN_TESTS (lgammal, long double);
  67   return result;
  68 }