|
Packit |
67cb25 |
/* movstat/qnacc.c
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* Moving window Q_n accumulator
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* Copyright (C) 2018 Patrick Alken
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is free software; you can redistribute it and/or modify
|
|
Packit |
67cb25 |
* it under the terms of the GNU General Public License as published by
|
|
Packit |
67cb25 |
* the Free Software Foundation; either version 3 of the License, or (at
|
|
Packit |
67cb25 |
* your option) any later version.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is distributed in the hope that it will be useful, but
|
|
Packit |
67cb25 |
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
67cb25 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
67cb25 |
* General Public License for more details.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* You should have received a copy of the GNU General Public License
|
|
Packit |
67cb25 |
* along with this program; if not, write to the Free Software
|
|
Packit |
67cb25 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
Packit |
67cb25 |
*/
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#include <config.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_math.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_vector.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_errno.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_movstat.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_sort.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_statistics.h>
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
typedef double qnacc_type_t;
|
|
Packit |
67cb25 |
typedef qnacc_type_t ringbuf_type_t;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#include "ringbuf.c"
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
typedef struct
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
qnacc_type_t *window; /* linear array for current window */
|
|
Packit |
67cb25 |
qnacc_type_t *work; /* workspace, length 3*n */
|
|
Packit |
67cb25 |
int *work_int; /* integer workspace, length 5*n */
|
|
Packit |
67cb25 |
ringbuf *rbuf; /* ring buffer storing current window */
|
|
Packit |
67cb25 |
} qnacc_state_t;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
static size_t
|
|
Packit |
67cb25 |
qnacc_size(const size_t n)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
size_t size = 0;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
size += sizeof(qnacc_state_t);
|
|
Packit |
67cb25 |
size += n * sizeof(qnacc_type_t); /* window */
|
|
Packit |
67cb25 |
size += 3 * n * sizeof(qnacc_type_t); /* work */
|
|
Packit |
67cb25 |
size += 5 * n * sizeof(int); /* work_int */
|
|
Packit |
67cb25 |
size += ringbuf_size(n);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return size;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
static int
|
|
Packit |
67cb25 |
qnacc_init(const size_t n, void * vstate)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
qnacc_state_t * state = (qnacc_state_t *) vstate;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
state->window = (qnacc_type_t *) ((unsigned char *) vstate + sizeof(qnacc_state_t));
|
|
Packit |
67cb25 |
state->work = (qnacc_type_t *) ((unsigned char *) state->window + n * sizeof(qnacc_type_t));
|
|
Packit |
67cb25 |
state->work_int = (int *) ((unsigned char *) state->work + 3 * n * sizeof(qnacc_type_t));
|
|
Packit |
67cb25 |
state->rbuf = (ringbuf *) ((unsigned char *) state->work_int + 5 * n * sizeof(int));
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
ringbuf_init(n, state->rbuf);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return GSL_SUCCESS;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
static int
|
|
Packit |
67cb25 |
qnacc_insert(const qnacc_type_t x, void * vstate)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
qnacc_state_t * state = (qnacc_state_t *) vstate;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
/* add new element to ring buffer */
|
|
Packit |
67cb25 |
ringbuf_insert(x, state->rbuf);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return GSL_SUCCESS;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
static int
|
|
Packit |
67cb25 |
qnacc_delete(void * vstate)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
qnacc_state_t * state = (qnacc_state_t *) vstate;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (!ringbuf_is_empty(state->rbuf))
|
|
Packit |
67cb25 |
ringbuf_pop_back(state->rbuf);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return GSL_SUCCESS;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
/* FIXME XXX: this is inefficient - could be improved by maintaining a sorted ring buffer */
|
|
Packit |
67cb25 |
static int
|
|
Packit |
67cb25 |
qnacc_get(void * params, qnacc_type_t * result, const void * vstate)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
const qnacc_state_t * state = (const qnacc_state_t *) vstate;
|
|
Packit |
67cb25 |
size_t n = ringbuf_copy(state->window, state->rbuf);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
(void) params;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
gsl_sort(state->window, 1, n);
|
|
Packit |
67cb25 |
*result = gsl_stats_Qn_from_sorted_data(state->window, 1, n, state->work, state->work_int);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return GSL_SUCCESS;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
static const gsl_movstat_accum qn_accum_type =
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
qnacc_size,
|
|
Packit |
67cb25 |
qnacc_init,
|
|
Packit |
67cb25 |
qnacc_insert,
|
|
Packit |
67cb25 |
qnacc_delete,
|
|
Packit |
67cb25 |
qnacc_get
|
|
Packit |
67cb25 |
};
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
const gsl_movstat_accum *gsl_movstat_accum_Qn = &qn_accum_type;
|