1 /****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en *
32 ****************************************************************************/
34 #include "form.priv.h"
36 MODULE_ID("$Id: fld_arg.c,v 1.6 2002/07/06 15:33:27 juergen Exp $")
38 /*---------------------------------------------------------------------------
40 | Function : int set_fieldtype_arg(
42 | void * (* const make_arg)(va_list *),
43 | void * (* const copy_arg)(const void *),
44 | void (* const free_arg)(void *) )
46 | Description : Connects to the type additional arguments necessary
47 | for a set_field_type call. The various function pointer
49 | make_arg : allocates a structure for the field
50 | specific parameters.
51 | copy_arg : duplicate the structure created by
53 | free_arg : Release the memory allocated by make_arg
56 | At least make_arg must be non-NULL.
57 | You may pass NULL for copy_arg and free_arg if your
58 | make_arg function doesn't allocate memory and your
59 | arg fits into the storage for a (void*).
61 | Return Values : E_OK - success
62 | E_BAD_ARGUMENT - invalid argument
63 +--------------------------------------------------------------------------*/
67 void * (* const make_arg)(va_list *),
68 void * (* const copy_arg)(const void *),
69 void (* const free_arg)(void *))
71 if ( !typ || !make_arg )
72 RETURN(E_BAD_ARGUMENT);
74 typ->status |= _HAS_ARGS;
75 typ->makearg = make_arg;
76 typ->copyarg = copy_arg;
77 typ->freearg = free_arg;
81 /*---------------------------------------------------------------------------
83 | Function : void *field_arg(const FIELD *field)
85 | Description : Retrieve pointer to the fields argument structure.
87 | Return Values : Pointer to structure or NULL if none is defined.
88 +--------------------------------------------------------------------------*/
89 NCURSES_EXPORT(void *)
90 field_arg (const FIELD * field)
92 return Normalize_Field(field)->arg;
95 /* fld_arg.c ends here */