[rrd-users] SV: rrd_graph API change..

[Steffen Schumacher]

Thnx!

Releaved me of having to do the trial and error my self..

/Steffen


-----Oprindelig meddelelse-----
Fra: Chris Picton [mailto:chrisp at tangent.co.za] 
Sendt: 8. november 2005 14:27
Til: Steffen Schumacher
Cc: rrd-users at list.ee.ethz.ch
Emne: Re: [rrd-users] rrd_graph API change..

On Tue, 2005-11-08 at 14:03 +0100, Steffen Schumacher wrote:
> Hi!
> 
> I'm trying to build rrdjtool, which is a Java JNI wrapper for
> librrdtool.
> It has function:
> JNIEXPORT jint JNICALL Java_rrd_Rrd_createRrdGraph
>         (JNIEnv *env, jobject obj, jobjectArray ar) {
>         int n = (*env)->GetArrayLength(env, ar);
>         char **tokens = getTokens(env, ar, n);
>         char **calcpr;
>         int xsize, ysize, i;
> >>      int status = rrd_graph(n, tokens, &calcpr, &xsize, &ysize);

I changed this to
        double ymin, ymax;
        int status = rrd_graph(n, tokens, &calcpr, &xsize, &ysize, NULL,
&ymin, &ymax);

And all seems fine so far

>         preserveError();
>         if(status != -1) {
>                 preserveGraphOutput(calcpr, xsize, ysize);
>         }
>         releaseTokens(tokens, n);
>         return status;
> }
> 
> Where the rrd_graph(n, tokens, &calcpr, &xsize, &ysize) call was
changed
> to:
> Int rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int
> *ysize, FILE *stream, double *ymin, double *ymax).
> I have no idea when this change was done, and I really only care about
> getting the problem fixed..
> 
> So basically FILE *stream, double *ymin, double *ymax was appended i
> think.
> 
> My question is: do I have to specify these last few vars or could i
send
> null pointers in stead?
> If not my take in things would be to copy x and ysize vars into
doubles
> and use these for x and ymin. My only problem would then be the FILE.
> 
> Anyways if anyone could point me in the direction of a bit more decent
> doc the mere code then that might help too.
> 
> 
> /Steffen
> 
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