xref: /openbsd-src/lib/libform/fld_ftlink.c (revision c7ef0cfc17afcba97172c25e1e3a943e893bc632)

/*	$OpenBSD: fld_ftlink.c,v 1.7 2023/10/17 09:52:10 nicm Exp $	*/
/****************************************************************************
 * Copyright 2020,2021 Thomas E. Dickey                                     *
 * Copyright 1998-2010,2012 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    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * 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, 1995,1997                                    *
 ****************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fld_ftlink.c,v 1.7 2023/10/17 09:52:10 nicm Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  FIELDTYPE *link_fieldtype(
|                                FIELDTYPE *type1,
|                                FIELDTYPE *type2)
|
|   Description   :  Create a new fieldtype built from the two given types.
|                    They are connected by an logical 'OR'.
|                    If an error occurs, errno is set to
|                       E_BAD_ARGUMENT  - invalid arguments
|                       E_SYSTEM_ERROR  - system error (no memory)
|
|   Return Values :  Fieldtype pointer or NULL if error occurred.
+--------------------------------------------------------------------------*/
FORM_EXPORT(FIELDTYPE *)
link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2)
{
  FIELDTYPE *nftyp = (FIELDTYPE *)0;

  T((T_CALLED("link_fieldtype(%p,%p)"), (void *)type1, (void *)type2));
  if (type1 && type2)
    {
      nftyp = typeMalloc(FIELDTYPE, 1);

      if (nftyp)
	{
	  T((T_CREATE("fieldtype %p"), (void *)nftyp));
	  *nftyp = *_nc_Default_FieldType;
	  SetStatus(nftyp, _LINKED_TYPE);
	  if ((type1->status & _HAS_ARGS) || (type2->status & _HAS_ARGS))
	    SetStatus(nftyp, _HAS_ARGS);
	  if ((type1->status & _HAS_CHOICE) || (type2->status & _HAS_CHOICE))
	    SetStatus(nftyp, _HAS_CHOICE);
	  nftyp->left = type1;
	  nftyp->right = type2;
	  type1->ref++;
	  type2->ref++;
	}
      else
	{
	  SET_ERROR(E_SYSTEM_ERROR);
	}
    }
  else
    {
      SET_ERROR(E_BAD_ARGUMENT);
    }
  returnFieldType(nftyp);
}

/* fld_ftlink.c ends here */