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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 */