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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. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file is part of the XForms library package.
* Copyright (c) 1998-2002 T.C. Zhao
* All rights reserved.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "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;
if ( ! ( mat = fl_malloc( ( nrows + 1 ) * sizeof *mat ) ) )
return NULL;
mat[ 0 ] = ( void * ) FL_GET_MATRIX;
if ( ! ( mat[ 1 ] = fl_calloc( nrows * ncols, esize ) ) )
{
fl_free( mat );
return NULL;
}
for ( i = 2; i <= nrows; i++ )
mat[ i ] = mat[ i - 1 ] + ncols * esize;
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 *mat );
int i;
if ( ! mat )
return NULL;
mat[ 0 ] = ( char * ) FL_MAKE_MATRIX;
for ( mat[ 1 ] = mem, i = 2; i <= nrows; i++ )
mat[ i ] = mat[ i - 1 ] + ncols * esize;
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 ] );
fl_free( matrix - 1 );
}
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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