/* Copyright (C) 2001-2021 Artifex Software, Inc.
   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.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
*/


/* (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. */
static iodev_proc_open_device(null_open);
const gx_io_device gs_iodev_null = {
    "%null%", "Special",
    {
        iodev_no_init, iodev_no_finit, null_open, iodev_no_open_file,
        iodev_os_gp_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
    },
    NULL,
    NULL
};

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

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

/* <iodevice> .getdevparams <mark> <name> <value> ... */
static 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(imemory, op->value.bytes, r_size(op));
    if (iodev == 0)
        return_error(gs_error_undefined);
    stack_param_list_write(&list, &o_stack, NULL, iimemory);
    if ((code = gs_getdevparams(iodev, plist)) < 0) {
        pop(list.count * 2);
        return code;
    }
    pmark = ref_stack_index(&o_stack, list.count * 2);
    make_mark(pmark);
    return 0;
}

/* <mark> <name> <value> ... <iodevice> .putdevparams */
static 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(imemory, op->value.bytes, r_size(op));
    if (iodev == 0)
        return_error(gs_error_undefined);
    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 : gs_error_invalidaccess);
    }
    code = gs_putdevparams(iodev, plist);
    iparam_list_release(&list);
    if (code < 0)
        return code;
    pop(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)
};
