[Bug: atof() can't parse "NaN"]

Christopher Faylor cgf@alumni.unh.edu
Thu Jan 6 16:14:00 GMT 2005

----- Forwarded message from Roger Leigh <roger.leigh@epictechnology.co.uk> -----

From: Roger Leigh
Subject: Bug: atof() can't parse "NaN"
Date: Thu, 6 Jan 2005 16:07:11 +0000

Hi folks,

While fixing up glib-2.6.0 to build, I found a failure in the
floating-point tests.  This is seemingly because atof() is bust.
This is a trivial example:

/* for NAN and INFINITY */
#define _ISOC99_SOURCE

#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <ieeefp.h>

main ()
  double our_nan;

#ifdef NAN
  our_nan = NAN;
  /* Do this before any call to setlocale.  */
  our_nan = atof ("NaN");
  assert (isnan (our_nan));

  return 0;

When I run this (current net release) the assert fails, and it


Roger Leigh

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