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/* Copyright (C) 1993, 2000 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: ziodev2.c,v 1.6 2002/03/13 20:27:39 ray Exp $ */
/* (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%", "Special",
    {
        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, iodev->procs.fopen, mem);
}

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

/* <iodevice> .getdevparams <mark> <name> <value> ... */
private int
zgetdevparams(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    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, iimemory);
    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(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    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, iimemory);
    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)
};