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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.
*
* handle gzip/compress
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "include/forms.h"
#include "flimage.h"
#include "flimage_int.h"
/***************************************
***************************************/
static int
GZIP_identify( FILE * fp )
{
char buf[ 2 ];
if ( fread( buf, 1, 2, fp ) != 2 )
return 0;
return buf[ 0 ] == '\037'
&& ( buf[ 1 ] == '\213' || buf[ 1 ] == '\235' );
}
/***************************************
***************************************/
static int
GZIP_description( FL_IMAGE * im )
{
static char *cmds[ ] = { "gzip -dc %s > %s", NULL };
return flimage_description_via_filter( im, cmds, "reading gzip ...", 0 );
}
/***************************************
***************************************/
static int
GZIP_load( FL_IMAGE * im FL_UNUSED_ARG )
{
fprintf( stderr, "should never been here\n" );
return -1;
}
/***************************************
***************************************/
static int
GZIP_dump( FL_IMAGE * im )
{
static char *cmds[ ] = {"gzip %s > %s", NULL };
static char *formats[ ] = { "ppm", "pgm", "pbm", NULL };
return flimage_write_via_filter( im, cmds, formats, 0 );
}
/***************************************
***************************************/
void
flimage_enable_gzip( void )
{
flimage_add_format( "GZIP format", "gzip", "gz",
FL_IMAGE_FLEX,
GZIP_identify,
GZIP_description,
GZIP_load,
GZIP_dump );
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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