File: ziodev2.c

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/* Copyright (C) 2001-2006 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 that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: ziodev2.c 9043 2008-08-28 22:48:19Z giles $ */
/* (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, 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
    }
};

static 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> ... */
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(op->value.bytes, r_size(op));
    if (iodev == 0)
	return_error(e_undefined);
    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 */
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(op->value.bytes, r_size(op));
    if (iodev == 0)
	return_error(e_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 : 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)
};