freebsd-skq/contrib/ncurses/form/fld_ftlink.c

/****************************************************************************
 * Copyright (c) 1998-2004,2007 Free Software Foundation, Inc.              *
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 * 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,      *
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 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
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 * in all copies or substantial portions of the Software.                   *
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/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fld_ftlink.c,v 1.13 2007/10/13 19:30:35 tom 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.
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(FIELDTYPE *)
link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2)
{
  FIELDTYPE *nftyp = (FIELDTYPE *)0;

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

      if (nftyp)
	{
	  T((T_CREATE("fieldtype %p"), nftyp));
	  *nftyp = *_nc_Default_FieldType;
	  nftyp->status |= _LINKED_TYPE;
	  if ((type1->status & _HAS_ARGS) || (type2->status & _HAS_ARGS))
	    nftyp->status |= _HAS_ARGS;
	  if ((type1->status & _HAS_CHOICE) || (type2->status & _HAS_CHOICE))
	    nftyp->status |= _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 */