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/* Author: G. Jungman
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_qrng.h>
gsl_qrng *
gsl_qrng_alloc (const gsl_qrng_type * T, unsigned int dimension)
{
gsl_qrng * q = (gsl_qrng *) malloc (sizeof (gsl_qrng));
if (q == 0)
{
GSL_ERROR_VAL ("allocation failed for qrng struct",
GSL_ENOMEM, 0);
};
q->dimension = dimension;
q->state_size = T->state_size(dimension);
q->state = malloc (q->state_size);
if (q->state == 0)
{
free (q);
GSL_ERROR_VAL ("allocation failed for qrng state",
GSL_ENOMEM, 0);
};
q->type = T;
T->init_state(q->state, q->dimension);
return q;
}
void
gsl_qrng_init (gsl_qrng * q)
{
(q->type->init_state) (q->state, q->dimension);
}
int
gsl_qrng_memcpy (gsl_qrng * dest, const gsl_qrng * src)
{
if (dest->type != src->type)
{
GSL_ERROR ("generators must be of the same type", GSL_EINVAL);
}
dest->dimension = src->dimension;
dest->state_size = src->state_size;
memcpy (dest->state, src->state, src->state_size);
return GSL_SUCCESS;
}
gsl_qrng *
gsl_qrng_clone (const gsl_qrng * q)
{
gsl_qrng * r = (gsl_qrng *) malloc (sizeof (gsl_qrng));
if (r == 0)
{
GSL_ERROR_VAL ("failed to allocate space for rng struct",
GSL_ENOMEM, 0);
};
r->dimension = q->dimension;
r->state_size = q->state_size;
r->state = malloc (r->state_size);
if (r->state == 0)
{
free (r);
GSL_ERROR_VAL ("failed to allocate space for rng state",
GSL_ENOMEM, 0);
};
r->type = q->type;
memcpy (r->state, q->state, q->state_size);
return r;
}
#ifndef HIDE_INLINE_STATIC
int
gsl_qrng_get (const gsl_qrng * q, double x[])
{
return (q->type->get) (q->state, q->dimension, x);
}
#endif
const char *
gsl_qrng_name (const gsl_qrng * q)
{
return q->type->name;
}
size_t
gsl_qrng_size (const gsl_qrng * q)
{
return q->state_size;
}
void *
gsl_qrng_state (const gsl_qrng * q)
{
return q->state;
}
void
gsl_qrng_free (gsl_qrng * q)
{
if(q != 0) {
if(q->state != 0) free (q->state);
free (q);
}
}
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