fld_ftlink.c revision 262685 
1/****************************************************************************
2 * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc.              *
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28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33#include "form.priv.h"
34
35MODULE_ID("$Id: fld_ftlink.c,v 1.15 2012/06/10 00:27:49 tom Exp $")
36
37/*---------------------------------------------------------------------------
38|   Facility      :  libnform
39|   Function      :  FIELDTYPE *link_fieldtype(
40|                                FIELDTYPE *type1,
41|                                FIELDTYPE *type2)
42|
43|   Description   :  Create a new fieldtype built from the two given types.
44|                    They are connected by an logical 'OR'.
45|                    If an error occurs, errno is set to
46|                       E_BAD_ARGUMENT  - invalid arguments
47|                       E_SYSTEM_ERROR  - system error (no memory)
48|
49|   Return Values :  Fieldtype pointer or NULL if error occurred.
50+--------------------------------------------------------------------------*/
51NCURSES_EXPORT(FIELDTYPE *)
52link_fieldtype(FIELDTYPE *type1, FIELDTYPE *type2)
53{
54  FIELDTYPE *nftyp = (FIELDTYPE *)0;
55
56  T((T_CALLED("link_fieldtype(%p,%p)"), (void *)type1, (void *)type2));
57  if (type1 && type2)
58    {
59      nftyp = typeMalloc(FIELDTYPE, 1);
60
61      if (nftyp)
62	{
63	  T((T_CREATE("fieldtype %p"), (void *)nftyp));
64	  *nftyp = *_nc_Default_FieldType;
65	  SetStatus(nftyp, _LINKED_TYPE);
66	  if ((type1->status & _HAS_ARGS) || (type2->status & _HAS_ARGS))
67	    SetStatus(nftyp, _HAS_ARGS);
68	  if ((type1->status & _HAS_CHOICE) || (type2->status & _HAS_CHOICE))
69	    SetStatus(nftyp, _HAS_CHOICE);
70	  nftyp->left = type1;
71	  nftyp->right = type2;
72	  type1->ref++;
73	  type2->ref++;
74	}
75      else
76	{
77	  SET_ERROR(E_SYSTEM_ERROR);
78	}
79    }
80  else
81    {
82      SET_ERROR(E_BAD_ARGUMENT);
83    }
84  returnFieldType(nftyp);
85}
86
87/* fld_ftlink.c ends here */
88