1/****************************************************************************
2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
3 *                                                                          *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
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13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
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16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33#include "form.priv.h"
34
35MODULE_ID("$Id: fld_arg.c,v 1.11 2004/12/25 22:20:18 tom Exp $")
36
37/*---------------------------------------------------------------------------
38|   Facility      :  libnform
39|   Function      :  int set_fieldtype_arg(
40|                            FIELDTYPE *typ,
41|                            void * (* const make_arg)(va_list *),
42|                            void * (* const copy_arg)(const void *),
43|                            void   (* const free_arg)(void *) )
44|
45|   Description   :  Connects to the type additional arguments necessary
46|                    for a set_field_type call. The various function pointer
47|                    arguments are:
48|                       make_arg : allocates a structure for the field
49|                                  specific parameters.
50|                       copy_arg : duplicate the structure created by
51|                                  make_arg
52|                       free_arg : Release the memory allocated by make_arg
53|                                  or copy_arg
54|
55|                    At least make_arg must be non-NULL.
56|                    You may pass NULL for copy_arg and free_arg if your
57|                    make_arg function doesn't allocate memory and your
58|                    arg fits into the storage for a (void*).
59|
60|   Return Values :  E_OK           - success
61|                    E_BAD_ARGUMENT - invalid argument
62+--------------------------------------------------------------------------*/
63NCURSES_EXPORT(int)
64set_fieldtype_arg(FIELDTYPE *typ,
65		  void *(*const make_arg)(va_list *),
66		  void *(*const copy_arg)(const void *),
67		  void (*const free_arg) (void *))
68{
69  T((T_CALLED("set_fieldtype_arg(%p,%p,%p,%p)"),
70     typ, make_arg, copy_arg, free_arg));
71
72  if (typ != 0 && make_arg != (void *)0)
73    {
74      typ->status |= _HAS_ARGS;
75      typ->makearg = make_arg;
76      typ->copyarg = copy_arg;
77      typ->freearg = free_arg;
78      RETURN(E_OK);
79    }
80  RETURN(E_BAD_ARGUMENT);
81}
82
83/*---------------------------------------------------------------------------
84|   Facility      :  libnform
85|   Function      :  void *field_arg(const FIELD *field)
86|
87|   Description   :  Retrieve pointer to the fields argument structure.
88|
89|   Return Values :  Pointer to structure or NULL if none is defined.
90+--------------------------------------------------------------------------*/
91NCURSES_EXPORT(void *)
92field_arg(const FIELD *field)
93{
94  T((T_CALLED("field_arg(%p)"), field));
95  returnVoidPtr(Normalize_Field(field)->arg);
96}
97
98/* fld_arg.c ends here */
99