xref: /freebsd/contrib/ncurses/form/fld_arg.c (revision 0e3d540892016a47f6a68ec9ba2879d35ce5f7c2)

/****************************************************************************
 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
 ****************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fld_arg.c,v 1.4 1999/05/16 17:16:04 juergen Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  int set_fieldtype_arg(
|                            FIELDTYPE *typ,
|                            void * (* const make_arg)(va_list *),
|                            void * (* const copy_arg)(const void *),
|                            void   (* const free_arg)(void *) )
|
|   Description   :  Connects to the type additional arguments necessary
|                    for a set_field_type call. The various function pointer
|                    arguments are:
|                       make_arg : allocates a structure for the field
|                                  specific parameters.
|                       copy_arg : duplicate the structure created by
|                                  make_arg
|                       free_arg : Release the memory allocated by make_arg
|                                  or copy_arg
|
|                    At least make_arg must be non-NULL.
|                    You may pass NULL for copy_arg and free_arg if your
|                    make_arg function doesn't allocate memory and your
|                    arg fits into the storage for a (void*).
|
|   Return Values :  E_OK           - success
|                    E_BAD_ARGUMENT - invalid argument
+--------------------------------------------------------------------------*/
int set_fieldtype_arg(FIELDTYPE * typ,
		      void * (* const make_arg)(va_list *),
		      void * (* const copy_arg)(const void *),
		      void   (* const free_arg)(void *))
{
  if ( !typ || !make_arg )
    RETURN(E_BAD_ARGUMENT);

  typ->status |= _HAS_ARGS;
  typ->makearg = make_arg;
  typ->copyarg = copy_arg;
  typ->freearg = free_arg;
  RETURN(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  void *field_arg(const FIELD *field)
|
|   Description   :  Retrieve pointer to the fields argument structure.
|
|   Return Values :  Pointer to structure or NULL if none is defined.
+--------------------------------------------------------------------------*/
void *field_arg(const FIELD * field)
{
  return Normalize_Field(field)->arg;
}

/* fld_arg.c ends here */