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/*
*
* This file is part of the XForms library package.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with XForms; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
*/
/*
* $Id: matrix.c,v 1.0 2002/05/08 05:16:30 zhao Release $
*
*.
* This file is part of the XForms library package.
* Copyright (c) 1998-2002 T.C. Zhao
* All rights reserved.
*.
*
*/
#include "forms.h"
#include "flimage.h"
#include "flimage_int.h"
void *
fl_get_matrix(int nrows, int ncols, unsigned int esize)
{
char **mat;
int i, stride = ncols * esize;
if (!(mat = fl_malloc((nrows + 1) * sizeof(void *))))
return 0;
mat[0] = (char *) FL_GET_MATRIX;
if (!(mat[1] = fl_calloc(nrows * ncols, esize)))
{
fl_free(mat);
return 0;
}
for (i = 2; i <= nrows; i++)
mat[i] = mat[i - 1] + stride;
return mat + 1;
}
/* given a piece of memory, make a matrix out of it */
void *
fl_make_matrix(int nrows, int ncols, unsigned int esize, void *mem)
{
char **mat = fl_malloc((nrows + 1) * sizeof(void *));
int i, stride = ncols * esize;
if (mat)
{
mat[0] = (char *) FL_MAKE_MATRIX;
for (mat[1] = mem, i = 2; i <= nrows; i++)
mat[i] = mat[i - 1] + stride;
}
return mat + 1;
}
void
fl_free_matrix(void *p)
{
char **matrix = p;
if (!p)
return;
if (matrix[-1] && matrix[0])
{
if (matrix[-1] == (char *) FL_GET_MATRIX)
fl_free(matrix[0]);
matrix[0] = 0;
matrix[-1] = (char *) FL_FREE_MATRIX;
fl_free(matrix - 1);
}
}
#if 0
void *
fl_get_3d(int d1, int d2, int d3, unsigned es)
{
char **m;
int i;
/* get one more and mark the end with null */
m = malloc(sizeof(*m) * (d1 + 1));
for (i = 0; i < d1; i++)
m[i] = fl_get_matrix(d2, d3, es);
m[d1] = 0;
return m;
}
void
fl_free_3d(void *p)
{
char **m = p;
for (; m && *m; m++)
{
fl_free_matrix(*m);
*m = 0;
}
}
#endif
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