1 /****************************************************************************
2 * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
33 #include "form.priv.h"
35 MODULE_ID("$Id: fld_newftyp.c,v 1.9 2003/11/08 20:45:36 tom Exp $")
37 static FIELDTYPE
const default_fieldtype
= {
39 0L, /* reference count */
40 (FIELDTYPE
*)0, /* pointer to left operand */
41 (FIELDTYPE
*)0, /* pointer to right operand */
42 NULL
, /* makearg function */
43 NULL
, /* copyarg function */
44 NULL
, /* freearg function */
45 NULL
, /* field validation function */
46 NULL
, /* Character check function */
47 NULL
, /* enumerate next function */
48 NULL
/* enumerate previous function */
51 NCURSES_EXPORT_VAR(const FIELDTYPE
*) _nc_Default_FieldType
= &default_fieldtype
;
53 /*---------------------------------------------------------------------------
55 | Function : FIELDTYPE *new_fieldtype(
56 | bool (* const field_check)(FIELD *,const void *),
57 | bool (* const char_check) (int, const void *) )
59 | Description : Create a new fieldtype. The application programmer must
60 | write a field_check and a char_check function and give
61 | them as input to this call.
62 | If an error occurs, errno is set to
63 | E_BAD_ARGUMENT - invalid arguments
64 | E_SYSTEM_ERROR - system error (no memory)
66 | Return Values : Fieldtype pointer or NULL if error occurred
67 +--------------------------------------------------------------------------*/
68 NCURSES_EXPORT(FIELDTYPE
*)
70 bool (* const field_check
)(FIELD
*,const void *),
71 bool (* const char_check
) (int,const void *) )
73 FIELDTYPE
*nftyp
= (FIELDTYPE
*)0;
75 if ( (field_check
) || (char_check
) )
77 nftyp
= (FIELDTYPE
*)malloc(sizeof(FIELDTYPE
));
80 *nftyp
= default_fieldtype
;
81 nftyp
->fcheck
= field_check
;
82 nftyp
->ccheck
= char_check
;
86 SET_ERROR( E_SYSTEM_ERROR
);
91 SET_ERROR( E_BAD_ARGUMENT
);
96 /*---------------------------------------------------------------------------
98 | Function : int free_fieldtype(FIELDTYPE *typ)
100 | Description : Release the memory associated with this fieldtype.
102 | Return Values : E_OK - success
103 | E_CONNECTED - there are fields referencing the type
104 | E_BAD_ARGUMENT - invalid fieldtype pointer
105 +--------------------------------------------------------------------------*/
107 free_fieldtype (FIELDTYPE
*typ
)
110 RETURN(E_BAD_ARGUMENT
);
115 if (typ
->status
& _RESIDENT
)
118 if (typ
->status
& _LINKED_TYPE
)
120 if (typ
->left
) typ
->left
->ref
--;
121 if (typ
->right
) typ
->right
->ref
--;
127 /* fld_newftyp.c ends here */