fld_ftlink.c revision 1.7 
1/*	$OpenBSD: fld_ftlink.c,v 1.7 2023/10/17 09:52:10 nicm Exp $	*/
2/****************************************************************************
3 * Copyright 2020,2021 Thomas E. Dickey                                     *
4 * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
5 *                                                                          *
6 * Permission is hereby granted, free of charge, to any person obtaining a  *
7 * copy of this software and associated documentation files (the            *
8 * "Software"), to deal in the Software without restriction, including      *
9 * without limitation the rights to use, copy, modify, merge, publish,      *
10 * distribute, distribute with modifications, sublicense, and/or sell       *
11 * copies of the Software, and to permit persons to whom the Software is    *
12 * furnished to do so, subject to the following conditions:                 *
13 *                                                                          *
14 * The above copyright notice and this permission notice shall be included  *
15 * in all copies or substantial portions of the Software.                   *
16 *                                                                          *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24 *                                                                          *
25 * Except as contained in this notice, the name(s) of the above copyright   *
26 * holders shall not be used in advertising or otherwise to promote the     *
27 * sale, use or other dealings in this Software without prior written       *
28 * authorization.                                                           *
29 ****************************************************************************/
30
31/****************************************************************************
32 *   Author:  Juergen Pfeifer, 1995,1997                                    *
33 ****************************************************************************/
34
35#include "form.priv.h"
36
37MODULE_ID("$Id: fld_ftlink.c,v 1.7 2023/10/17 09:52:10 nicm Exp $")
38
39/*---------------------------------------------------------------------------
40|   Facility      :  libnform
41|   Function      :  FIELDTYPE *link_fieldtype(
42|                                FIELDTYPE *type1,
43|                                FIELDTYPE *type2)
44|
45|   Description   :  Create a new fieldtype built from the two given types.
46|                    They are connected by an logical 'OR'.
47|                    If an error occurs, errno is set to
48|                       E_BAD_ARGUMENT  - invalid arguments
49|                       E_SYSTEM_ERROR  - system error (no memory)
50|
51|   Return Values :  Fieldtype pointer or NULL if error occurred.
52+--------------------------------------------------------------------------*/
53FORM_EXPORT(FIELDTYPE *)
54link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2)
55{
56  FIELDTYPE *nftyp = (FIELDTYPE *)0;
57
58  T((T_CALLED("link_fieldtype(%p,%p)"), (void *)type1, (void *)type2));
59  if (type1 && type2)
60    {
61      nftyp = typeMalloc(FIELDTYPE, 1);
62
63      if (nftyp)
64	{
65	  T((T_CREATE("fieldtype %p"), (void *)nftyp));
66	  *nftyp = *_nc_Default_FieldType;
67	  SetStatus(nftyp, _LINKED_TYPE);
68	  if ((type1->status & _HAS_ARGS) || (type2->status & _HAS_ARGS))
69	    SetStatus(nftyp, _HAS_ARGS);
70	  if ((type1->status & _HAS_CHOICE) || (type2->status & _HAS_CHOICE))
71	    SetStatus(nftyp, _HAS_CHOICE);
72	  nftyp->left = type1;
73	  nftyp->right = type2;
74	  type1->ref++;
75	  type2->ref++;
76	}
77      else
78	{
79	  SET_ERROR(E_SYSTEM_ERROR);
80	}
81    }
82  else
83    {
84      SET_ERROR(E_BAD_ARGUMENT);
85    }
86  returnFieldType(nftyp);
87}
88
89/* fld_ftlink.c ends here */
90