1/*	$OpenBSD: fld_arg.c,v 1.7 2023/10/17 09:52:10 nicm Exp $	*/
2/****************************************************************************
3 * Copyright 2018,2020 Thomas E. Dickey                                     *
4 * Copyright 1998-2012,2016 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_arg.c,v 1.7 2023/10/17 09:52:10 nicm Exp $")
38
39/*---------------------------------------------------------------------------
40|   Facility      :  libnform
41|   Function      :  int set_fieldtype_arg(
42|                            FIELDTYPE *typ,
43|                            void * (* const make_arg)(va_list *),
44|                            void * (* const copy_arg)(const void *),
45|                            void   (* const free_arg)(void *) )
46|
47|   Description   :  Connects to the type additional arguments necessary
48|                    for a set_field_type call. The various function pointer
49|                    arguments are:
50|                       make_arg : allocates a structure for the field
51|                                  specific parameters.
52|                       copy_arg : duplicate the structure created by
53|                                  make_arg
54|                       free_arg : Release the memory allocated by make_arg
55|                                  or copy_arg
56|
57|                    At least make_arg must be non-NULL.
58|                    You may pass NULL for copy_arg and free_arg if your
59|                    make_arg function doesn't allocate memory and your
60|                    arg fits into the storage for a (void*).
61|
62|   Return Values :  E_OK           - success
63|                    E_BAD_ARGUMENT - invalid argument
64+--------------------------------------------------------------------------*/
65FORM_EXPORT(int)
66set_fieldtype_arg(FIELDTYPE *typ,
67		  void *(*const make_arg)(va_list *),
68		  void *(*const copy_arg)(const void *),
69		  void (*const free_arg) (void *))
70{
71  TR_FUNC_BFR(3);
72
73  T((T_CALLED("set_fieldtype_arg(%p,%s,%s,%s)"),
74     (void *)typ,
75     TR_FUNC_ARG(0, make_arg),
76     TR_FUNC_ARG(1, copy_arg),
77     TR_FUNC_ARG(2, free_arg)));
78
79  if (typ != 0 && make_arg != (void *)0)
80    {
81      SetStatus(typ, _HAS_ARGS);
82      typ->makearg = make_arg;
83      typ->copyarg = copy_arg;
84      typ->freearg = free_arg;
85      RETURN(E_OK);
86    }
87  RETURN(E_BAD_ARGUMENT);
88}
89
90/*---------------------------------------------------------------------------
91|   Facility      :  libnform
92|   Function      :  void *field_arg(const FIELD *field)
93|
94|   Description   :  Retrieve pointer to the field's argument structure.
95|
96|   Return Values :  Pointer to structure or NULL if none is defined.
97+--------------------------------------------------------------------------*/
98FORM_EXPORT(void *)
99field_arg(const FIELD *field)
100{
101  T((T_CALLED("field_arg(%p)"), (const void *)field));
102  returnVoidPtr(Normalize_Field(field)->arg);
103}
104
105/* fld_arg.c ends here */
106