math/test-signgam-main.c

   1 /* Test lgamma functions do not set signgam for ISO C.
   2    Copyright (C) 2015-2016 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #undef _LIBC
  20 #undef _GNU_SOURCE
  21 #define _ISOMAC
  22
  23 #include <math.h>
  24 #include <stdio.h>
  25
  26 #define INITVAL ((TYPE) -1 / 3)
  27
  28 #if DO_INIT
  29 TYPE signgam = INITVAL;
  30 #else
  31 TYPE signgam;
  32 #endif
  33
  34 #define RUN_TESTS(FUNC, TYPE)                                   \
  35   do                                                            \
  36     {                                                           \
  37       volatile TYPE a, b, c __attribute__ ((unused));           \
  38       a = 0.5;                                                  \
  39       b = -0.5;                                                 \
  40       signgam = INITVAL;                                        \
  41       c = FUNC (a);                                             \
  42       if (signgam == INITVAL)                                   \
  43         puts ("PASS: " #FUNC " (0.5) setting signgam");         \
  44       else                                                      \
  45         {                                                       \
  46           puts ("FAIL: " #FUNC " (0.5) setting signgam");       \
  47           result = 1;                                           \
  48         }                                                       \
  49       signgam = INITVAL;                                        \
  50       c = FUNC (b);                                             \
  51       if (signgam == INITVAL)                                   \
  52         puts ("PASS: " #FUNC " (-0.5) setting signgam");        \
  53       else                                                      \
  54         {                                                       \
  55           puts ("FAIL: " #FUNC " (-0.5) setting signgam");      \
  56           result = 1;                                           \
  57         }                                                       \
  58     }                                                           \
  59   while (0)
  60
  61 int
  62 main (void)
  63 {
  64   int result = 0;
  65   RUN_TESTS (lgammaf, float);
  66   RUN_TESTS (lgamma, double);
  67 #ifndef NO_LONG_DOUBLE
  68   RUN_TESTS (lgammal, long double);
  69 #endif
  70   return result;
  71 }