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#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <gsl/gsl_ntuple.h>
#include <gsl/gsl_test.h>
#include <gsl/gsl_ieee_utils.h>
struct data
{
int num;
double x;
double y;
double z;
};
int sel_func (void *ntuple_data, void * params);
double val_func (void *ntuple_data, void * params);
int
main (void)
{
struct data ntuple_row;
int i;
double x[1000], y[1000], z[1000], f[100];
gsl_ntuple_select_fn S;
gsl_ntuple_value_fn V;
double scale = 1.5;
gsl_ieee_env_setup ();
/* zero struct including padding bytes to avoid valgrind errors */
memset(&ntuple_row, 0, sizeof(struct data));
S.function = &sel_func;
S.params = &scale;
V.function = &val_func;
V.params = &scale;
{
gsl_ntuple *ntuple = gsl_ntuple_create ("test.dat", &ntuple_row,
sizeof (ntuple_row));
int status = 0;
for (i = 0; i < 100; i++) f[i] = 0;
for (i = 0; i < 1000; i++)
{
double xi = 1.0 / (i + 1.5);
double yi = xi * xi ;
double zi = xi * xi * xi;
ntuple_row.x = xi;
ntuple_row.y = yi;
ntuple_row.z = zi;
ntuple_row.num = i;
x[i] = xi; y[i] = yi; z[i] = zi;
if (xi * scale < 0.1)
{
double v = xi + yi + zi;
int k = (int)(100.0*v*scale);
f[k]++;
}
/* printf ("x,y,z = %f,%f,%f; n=%x \n", ntuple_row.x,
ntuple_row.y, ntuple_row.z, ntuple_row.num); */
{
int s = gsl_ntuple_bookdata (ntuple);
if (s != GSL_SUCCESS)
{
status = 1;
}
}
}
gsl_ntuple_close (ntuple);
gsl_test (status, "writing ntuples");
}
{
gsl_ntuple *ntuple = gsl_ntuple_open ("test.dat", &ntuple_row,
sizeof (ntuple_row));
int status = 0;
for (i = 0; i < 1000; i++)
{
gsl_ntuple_read (ntuple);
status = (ntuple_row.num != i);
status |= (ntuple_row.x != x[i]);
status |= (ntuple_row.y != y[i]);
status |= (ntuple_row.z != z[i]);
/* printf ("x,y,z = %f,%f,%f; n=%d\n", ntuple_row.x,
ntuple_row.y, ntuple_row.z, ntuple_row.num); */
}
gsl_ntuple_close (ntuple);
gsl_test (status, "reading ntuples");
}
{
int status = 0;
gsl_ntuple *ntuple = gsl_ntuple_open ("test.dat", &ntuple_row,
sizeof (ntuple_row));
gsl_histogram *h = gsl_histogram_calloc_uniform (100, 0., 1.);
gsl_ntuple_project (h, ntuple, &V, &S);
gsl_ntuple_close (ntuple);
/* gsl_histogram_fprintf (stdout, h, "%f", "%f"); */
for (i = 0; i < 100; i++)
{
/* printf ("h %g f %g\n", h->bin[i], f[i]); */
if (h->bin[i] != f[i])
{
status = 1;
}
}
gsl_test (status, "histogramming ntuples");
gsl_histogram_free (h);
}
exit (gsl_test_summary());
}
int
sel_func (void *ntuple_data, void * params)
{
double x, y, z, scale;
scale = *(double *)params;
x = ((struct data *) ntuple_data)->x;
y = ((struct data *) ntuple_data)->y;
z = ((struct data *) ntuple_data)->z;
return (x*scale < 0.1);
}
double
val_func (void *ntuple_data, void * params)
{
double x, y, z, scale;
scale = *(double *)params;
x = ((struct data *) ntuple_data)->x;
y = ((struct data *) ntuple_data)->y;
z = ((struct data *) ntuple_data)->z;
return (x + y + z) * scale;
}
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