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/* wavelet/wavelet.c
*
* Copyright (C) 2004, 2009 Ivo Alxneit
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_wavelet.h>
gsl_wavelet *
gsl_wavelet_alloc (const gsl_wavelet_type * T, size_t k)
{
int status;
gsl_wavelet *w = (gsl_wavelet *) malloc (sizeof (gsl_wavelet));
if (w == NULL)
{
GSL_ERROR_VAL ("failed to allocate space for wavelet struct",
GSL_ENOMEM, 0);
};
w->type = T;
status = (T->init) (&(w->h1), &(w->g1), &(w->h2), &(w->g2),
&(w->nc), &(w->offset), k);
if (status)
{
free (w);
GSL_ERROR_VAL ("invalid wavelet member", GSL_EINVAL, 0);
}
return w;
}
void
gsl_wavelet_free (gsl_wavelet * w)
{
RETURN_IF_NULL (w);
free (w);
}
const char *
gsl_wavelet_name (const gsl_wavelet * w)
{
return w->type->name;
}
/* Let's not export this for now (BJG) */
#if 0
void
gsl_wavelet_print (const gsl_wavelet * w)
{
size_t n = w->nc;
size_t i;
printf ("Wavelet type: %s\n", w->type->name);
printf
(" h1(%d):%12.8f g1(%d):%12.8f h2(%d):%12.8f g2(%d):%12.8f\n",
0, w->h1[0], 0, w->g1[0], 0, w->h2[0], 0, w->g2[0]);
for (i = 1; i < (n < 10 ? n : 10); i++)
{
printf
(" h1(%d):%12.8f g1(%d):%12.8f h2(%d):%12.8f g2(%d):%12.8f\n",
i, w->h1[i], i, w->g1[i], i, w->h2[i], i, w->g2[i]);
}
for (; i < n; i++)
{
printf
("h1(%d):%12.8f g1(%d):%12.8f h2(%d):%12.8f g2(%d):%12.8f\n",
i, w->h1[i], i, w->g1[i], i, w->h2[i], i, w->g2[i]);
}
}
#endif
gsl_wavelet_workspace *
gsl_wavelet_workspace_alloc (size_t n)
{
gsl_wavelet_workspace *work;
if (n == 0)
{
GSL_ERROR_VAL ("length n must be positive integer", GSL_EDOM, 0);
}
work = (gsl_wavelet_workspace *) malloc (sizeof (gsl_wavelet_workspace));
if (work == NULL)
{
GSL_ERROR_VAL ("failed to allocate struct", GSL_ENOMEM, 0);
}
work->n = n;
work->scratch = (double *) malloc (n * sizeof (double));
if (work->scratch == NULL)
{
/* error in constructor, prevent memory leak */
free (work);
GSL_ERROR_VAL ("failed to allocate scratch space", GSL_ENOMEM, 0);
}
return work;
}
void
gsl_wavelet_workspace_free (gsl_wavelet_workspace * work)
{
RETURN_IF_NULL (work);
/* release scratch space */
free (work->scratch);
work->scratch = NULL;
free (work);
}
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