Re: not_a_number for MinGW build (gcc-4.5.0)

[Tatsuro M. <tma...@ya...>]

Hello

Ooops!

> So I changed from
> #if defined (__MSC__) || defined (DJGPP) || defined(__DJGPP__) 
> to
> #if defined (__MSC__) || defined (DJGPP) || defined(__DJGPP__) || defined (__MinGW32__)
> but pr NaN gives 0.0.

I have just make a mistake in define MinGW.

The macro 'defined (__MinGW32__)' should be 'defined (__MINGW32__)'.

I have attached the patch. This makes 'pr NaN gives NaN.'.

Regards

Tatsuro
 
--- Tatsuro MATSUOKA wrote:

> Hello
> 
> For current windows binaries,
> gnuplot> pr NaN
> 0.0
> 
> This is not correct.
> 
> For the cygwin and the djgpp (modified recently) give 
> gnuplot> pr NaN
> NaN
> 
> I have googled NaN for the MinGW, I have not obtained good information yet.
> So I have written the test code the below
> 
> **************************************
> #include <stdio.h>
> #include <math.h>
> 
> 
> int main(void){
>     double dbl;
> 	unsigned long uldbl[2];
> 
>     printf("test 0.0/0.0\n");
>     dbl = 0.0/0.0;
>     *( double* )uldbl = dbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     printf("test 0xffffffff 0x7fffffff \n");
>     uldbl[0]=0xffffffff; uldbl[1]= 0x7fffffff;
>     dbl = *( double* )uldbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     printf("test atof(\"NaN\") \n");
>     dbl = atof("NaN");
>     *( double* )uldbl = dbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     printf("test atof(\"-1.#IND00\") \n");
>     dbl = atof("-1.#IND00");
>     *( double* )uldbl = dbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     printf("test atof(\"1.#QNAN0\") \n");
>     dbl = atof("1.#QNAN0");
>     *( double* )uldbl = dbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     printf("test 0 \n");
>     dbl = 0;
>     *( double* )uldbl = dbl;
>     printf("%f \n",dbl);
>     printf("isnan = %d \n",isnan(dbl));
>     printf("%x %x\n", uldbl[0], uldbl[1]);
>     printf("\n");
> 
>     return 0;
> }
> *************************
> The results are
> 
> $ ./nan
> test 0.0/0.0
> -1.#IND00
> isnan = 1
> 0 fff80000
> 
> test 0xffffffff 0x7fffffff
> 1.#QNAN0
> isnan = 1
> ffffffff 7fffffff
> 
> test atof("NaN")
> 2293504.000000
> isnan = 0
> 0 41417f80
> 
> test atof("-1.#IND00")
> 2293504.000000
> isnan = 0
> 0 41417f80
> 
> test atof("1.#QNAN0")
> 2293504.000000
> isnan = 0
> 0 41417f80
> 
> test 0
> 0.000000
> isnan = 0
> 0 0
> 
> #******************
> 
> >From above it seems to be
> 
> 	unsigned long lnan[2]={0xffffffff, 0x7fffffff};
>     return *( double* )lnan;
> 
> is applicable as for the MSC and djgpp.
> 
> So I changed from
> #if defined (__MSC__) || defined (DJGPP) || defined(__DJGPP__) 
> to
> #if defined (__MSC__) || defined (DJGPP) || defined(__DJGPP__) || defined (__MinGW32__)
> but pr NaN gives 0.0.
> 
> This is the current situation.
> 
> Any suggestions?
> 
> Regards
> 
> Tatsuro
> 
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Learn more about breast cancer - Pink Ribbon Campaign 2010
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