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libpng-1.6.17/configure  view on Meta::CPAN

    char *term;
    double value;
    value = strtod (string, &term);
    if (value != 69 || term != (string + 4))
      return 1;
  }

  {
    /* Under Solaris 2.4, strtod returns the wrong value for the
       terminating character under some conditions.  */
    char *string = "NaN";
    char *term;
    strtod (string, &term);
    if (term != string && *(term - 1) == 0)
      return 1;
  }
  return 0;
}

_ACEOF
if ac_fn_c_try_run "$LINENO"; then :

libpng-1.6.17/contrib/libtests/pngvalid.c  view on Meta::CPAN

}

/* At the end of the list recalculate the output image pixel value from the
 * double precision values set up by the preceding 'mod' calls:
 */
static unsigned int
sample_scale(double sample_value, unsigned int scale)
{
   sample_value = floor(sample_value * scale + .5);

   /* Return NaN as 0: */
   if (!(sample_value > 0))
      sample_value = 0;
   else if (sample_value > scale)
      sample_value = scale;

   return (unsigned int)sample_value;
}

static void
image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that,

ppport.h  view on Meta::CPAN

    s++; if (s == send || (*s != 'F' && *s != 'f')) return 0;
    s++; if (s < send && (*s == 'I' || *s == 'i')) {
      s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
      s++; if (s == send || (*s != 'I' && *s != 'i')) return 0;
      s++; if (s == send || (*s != 'T' && *s != 't')) return 0;
      s++; if (s == send || (*s != 'Y' && *s != 'y')) return 0;
      s++;
    }
    sawinf = 1;
  } else if (*s == 'N' || *s == 'n') {
    /* XXX TODO: There are signaling NaNs and quiet NaNs. */
    s++; if (s == send || (*s != 'A' && *s != 'a')) return 0;
    s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
    s++;
    sawnan = 1;
  } else
    return 0;

  if (sawinf) {
    numtype &= IS_NUMBER_NEG; /* Keep track of sign  */
    numtype |= IS_NUMBER_INFINITY | IS_NUMBER_NOT_INT;