regress/lib/libc/ieeefp/infinity/infinity.c

   1 /*      $NetBSD: infinity.c,v 1.4 2004/03/05 01:00:53 kleink Exp $      */
   2
   3 /*
   4  * This file is in the Public Domain.
   5  *
   6  * Ben Harris, 2001
   7  */
   8
   9 /*
  10  * Check that HUGE_VAL{,FL} (alias __infinity{,fl}) really is infinite.
  11  * Alternatively, check that isinf() minimally works.
  12  */
  13
  14 #include <assert.h>
  15 #include <math.h>
  16
  17 int
  18 main(int argc, char **argv)
  19 {
  20
  21         /* HUGE_VAL is meant to be an infinity. */
  22         assert(isinf(HUGE_VAL));
  23
  24         /* HUGE_VALF is the float analog of HUGE_VAL. */
  25         assert(isinf(HUGE_VALF));
  26
  27         /* HUGE_VALL is the long double analog of HUGE_VAL. */
  28         assert(isinf(HUGE_VALL));
  29
  30         return 0;
  31 }