math/test-signgam-main.c

   1 /* Test lgamma functions do not set signgam for ISO C.
   2    Copyright (C) 2015-2017 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 __LIBC_INTERNAL_MATH_INLINES
  21 #undef _GNU_SOURCE
  22 #define _ISOMAC
  23
  24 #include <math.h>
  25 #include <stdio.h>
  26
  27 #define INITVAL ((TYPE) -1 / 3)
  28
  29 #if DO_INIT
  30 TYPE signgam = INITVAL;
  31 #else
  32 TYPE signgam;
  33 #endif
  34
  35 #define RUN_TESTS(FUNC, TYPE)                                   \
  36   do                                                            \
  37     {                                                           \
  38       volatile TYPE a, b, c __attribute__ ((unused));           \
  39       a = 0.5;                                                  \
  40       b = -0.5;                                                 \
  41       signgam = INITVAL;                                        \
  42       c = FUNC (a);                                             \
  43       if (signgam == INITVAL)                                   \
  44         puts ("PASS: " #FUNC " (0.5) setting signgam");         \
  45       else                                                      \
  46         {                                                       \
  47           puts ("FAIL: " #FUNC " (0.5) setting signgam");       \
  48           result = 1;                                           \
  49         }                                                       \
  50       signgam = INITVAL;                                        \
  51       c = FUNC (b);                                             \
  52       if (signgam == INITVAL)                                   \
  53         puts ("PASS: " #FUNC " (-0.5) setting signgam");        \
  54       else                                                      \
  55         {                                                       \
  56           puts ("FAIL: " #FUNC " (-0.5) setting signgam");      \
  57           result = 1;                                           \
  58         }                                                       \
  59     }                                                           \
  60   while (0)
  61
  62 int
  63 main (void)
  64 {
  65   int result = 0;
  66   RUN_TESTS (lgammaf, float);
  67   RUN_TESTS (lgamma, double);
  68 #ifndef NO_LONG_DOUBLE
  69   RUN_TESTS (lgammal, long double);
  70 #endif
  71   return result;
  72 }