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#include <config.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_sum.h>
gsl_sum_levin_utrunc_workspace *
gsl_sum_levin_utrunc_alloc (size_t n)
{
gsl_sum_levin_utrunc_workspace * w;
if (n == 0)
{
GSL_ERROR_VAL ("length n must be positive integer", GSL_EDOM, 0);
}
w = (gsl_sum_levin_utrunc_workspace *) malloc(sizeof(gsl_sum_levin_utrunc_workspace));
if (w == NULL)
{
GSL_ERROR_VAL ("failed to allocate struct", GSL_ENOMEM, 0);
}
w->q_num = (double *) malloc (n * sizeof (double));
if (w->q_num == NULL)
{
free(w) ; /* error in constructor, prevent memory leak */
GSL_ERROR_VAL ("failed to allocate space for q_num", GSL_ENOMEM, 0);
}
w->q_den = (double *) malloc (n * sizeof (double));
if (w->q_den == NULL)
{
free (w->q_num);
free (w) ; /* error in constructor, prevent memory leak */
GSL_ERROR_VAL ("failed to allocate space for q_den", GSL_ENOMEM, 0);
}
w->dsum = (double *) malloc (n * sizeof (double));
if (w->dsum == NULL)
{
free (w->q_den);
free (w->q_num);
free (w) ; /* error in constructor, prevent memory leak */
GSL_ERROR_VAL ("failed to allocate space for dsum", GSL_ENOMEM, 0);
}
w->size = n;
w->terms_used = 0;
w->sum_plain = 0;
return w;
}
void
gsl_sum_levin_utrunc_free (gsl_sum_levin_utrunc_workspace * w)
{
RETURN_IF_NULL (w);
free (w->dsum);
free (w->q_den);
free (w->q_num);
free (w);
}
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