/* Copyright (C) 1993, 1994, 1996, 1998 Aladdin Enterprises.  All rights reserved.

   This file is part of Aladdin Ghostscript.

   Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author
   or distributor accepts any responsibility for the consequences of using it,
   or for whether it serves any particular purpose or works at all, unless he
   or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
   License (the "License") for full details.

   Every copy of Aladdin Ghostscript must include a copy of the License,
   normally in a plain ASCII text file named PUBLIC.  The License grants you
   the right to copy, modify and redistribute Aladdin Ghostscript, but only
   under certain conditions described in the License.  Among other things, the
   License requires that the copyright notice and this notice be preserved on
   all copies.
 */

/*$Id: ziodev2.c $ */
/* (Level 2) IODevice operators */
#include "string_.h"
#include "ghost.h"
#include "gp.h"
#include "oper.h"
#include "stream.h"
#include "gxiodev.h"
#include "dstack.h"		/* for systemdict */
#include "files.h"		/* for file_open_stream */
#include "iparam.h"
#include "iutil2.h"
#include "store.h"

/* ------ %null% ------ */

/* This represents the null output file. */
private iodev_proc_open_device(null_open);
const gx_io_device gs_iodev_null = {
    "%null%", "FileSystem",
    {
	iodev_no_init, null_open, iodev_no_open_file,
	iodev_os_fopen, iodev_os_fclose,
	iodev_no_delete_file, iodev_no_rename_file, iodev_no_file_status,
	iodev_no_enumerate_files, NULL, NULL,
	iodev_no_get_params, iodev_no_put_params
    }
};

private int
null_open(gx_io_device * iodev, const char *access, stream ** ps,
	  gs_memory_t * mem)
{
    if (!streq1(access, 'w'))
	return_error(e_invalidfileaccess);
    return file_open_stream(gp_null_file_name,
			    strlen(gp_null_file_name),
			    access, 256 /* arbitrary */ , ps,
			    iodev->procs.fopen);
}

/* ------ %ram% ------ */

/* This is an IODevice with no interesting parameters for the moment. */
const gx_io_device gs_iodev_ram = {
    "%ram%", "Special",
    {
	iodev_no_init, iodev_no_open_device, iodev_no_open_file,
	iodev_no_fopen, iodev_no_fclose,
	iodev_no_delete_file, iodev_no_rename_file, iodev_no_file_status,
	iodev_no_enumerate_files, NULL, NULL,
	iodev_no_get_params, iodev_no_put_params
    }
};

/* ------ Operators ------ */

/* <iodevice> .getdevparams <mark> <name> <value> ... */
private int
zgetdevparams(os_ptr op)
{
    gx_io_device *iodev;
    stack_param_list list;
    gs_param_list *const plist = (gs_param_list *) & list;
    int code;
    ref *pmark;

    check_read_type(*op, t_string);
    iodev = gs_findiodevice(op->value.bytes, r_size(op));
    if (iodev == 0)
	return_error(e_undefinedfilename);
    stack_param_list_write(&list, &o_stack, NULL);
    if ((code = gs_getdevparams(iodev, plist)) < 0) {
	ref_stack_pop(&o_stack, list.count * 2);
	return code;
    }
    pmark = ref_stack_index(&o_stack, list.count * 2);
    make_mark(pmark);
    return 0;
}

/* <mark> <name> <value> ... <iodevice> .putdevparams */
private int
zputdevparams(os_ptr op)
{
    gx_io_device *iodev;
    stack_param_list list;
    gs_param_list *const plist = (gs_param_list *) & list;
    int code;
    password system_params_password;

    check_read_type(*op, t_string);
    iodev = gs_findiodevice(op->value.bytes, r_size(op));
    if (iodev == 0)
	return_error(e_undefinedfilename);
    code = stack_param_list_read(&list, &o_stack, 1, NULL, false);
    if (code < 0)
	return code;
    code = dict_read_password(&system_params_password, systemdict,
			      "SystemParamsPassword");
    if (code < 0)
	return code;
    code = param_check_password(plist, &system_params_password);
    if (code != 0) {
	iparam_list_release(&list);
	return_error(code < 0 ? code : e_invalidaccess);
    }
    code = gs_putdevparams(iodev, plist);
    iparam_list_release(&list);
    if (code < 0)
	return code;
    ref_stack_pop(&o_stack, list.count * 2 + 2);
    return 0;
}

/* ------ Initialization procedure ------ */

const op_def ziodev2_l2_op_defs[] =
{
    op_def_begin_level2(),
    {"1.getdevparams", zgetdevparams},
    {"2.putdevparams", zputdevparams},
    op_def_end(0)
};
