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_def.c,v 1.17 2003/11/08 21:15:02 Jonathon.Gray Exp $")
37 /* this can't be readonly */
38 static FIELD default_field
= {
49 NO_JUSTIFICATION
, /* just */
55 ALL_FIELD_OPTS
, /* opts */
56 (FIELD
*)0, /* snext */
57 (FIELD
*)0, /* sprev */
58 (FIELD
*)0, /* link */
60 (FIELDTYPE
*)0, /* type */
63 (char *)0 /* usrptr */
66 NCURSES_EXPORT_VAR(FIELD
*) _nc_Default_Field
= &default_field
;
68 /*---------------------------------------------------------------------------
70 | Function : TypeArgument *_nc_Make_Argument(
71 | const FIELDTYPE *typ,
75 | Description : Create an argument structure for the specified type.
76 | Use the type-dependent argument list to construct
79 | Return Values : Pointer to argument structure. Maybe NULL.
80 | In case of an error in *err an error counter is increased.
81 +--------------------------------------------------------------------------*/
82 NCURSES_EXPORT(TypeArgument
*)
84 (const FIELDTYPE
*typ
, va_list *ap
, int *err
)
86 TypeArgument
*res
= (TypeArgument
*)0;
89 if (typ
&& (typ
->status
& _HAS_ARGS
))
92 if (typ
->status
& _LINKED_TYPE
)
94 p
= (TypeArgument
*)malloc(sizeof(TypeArgument
));
97 p
->left
= _nc_Make_Argument(typ
->left
,ap
,err
);
98 p
->right
= _nc_Make_Argument(typ
->right
,ap
,err
);
105 assert(typ
->makearg
);
106 if ( !(res
=(TypeArgument
*)typ
->makearg(ap
)) )
113 /*---------------------------------------------------------------------------
114 | Facility : libnform
115 | Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ,
116 | const TypeArgument *argp,
119 | Description : Create a copy of an argument structure for the specified
122 | Return Values : Pointer to argument structure. Maybe NULL.
123 | In case of an error in *err an error counter is increased.
124 +--------------------------------------------------------------------------*/
125 NCURSES_EXPORT(TypeArgument
*)
127 (const FIELDTYPE
*typ
,
128 const TypeArgument
*argp
, int *err
)
130 TypeArgument
*res
= (TypeArgument
*)0;
133 if ( typ
&& (typ
->status
& _HAS_ARGS
) )
136 if (typ
->status
& _LINKED_TYPE
)
138 p
= (TypeArgument
*)malloc(sizeof(TypeArgument
));
141 p
->left
= _nc_Copy_Argument(typ
,argp
->left
,err
);
142 p
->right
= _nc_Copy_Argument(typ
,argp
->right
,err
);
151 if (!(res
= (TypeArgument
*)(typ
->copyarg((const void *)argp
))))
155 res
= (TypeArgument
*)argp
;
161 /*---------------------------------------------------------------------------
162 | Facility : libnform
163 | Function : void _nc_Free_Argument(const FIELDTYPE *typ,
164 | TypeArgument * argp )
166 | Description : Release memory associated with the argument structure
167 | for the given fieldtype.
170 +--------------------------------------------------------------------------*/
173 (const FIELDTYPE
* typ
, TypeArgument
* argp
)
175 if (!typ
|| !(typ
->status
& _HAS_ARGS
))
178 if (typ
->status
& _LINKED_TYPE
)
181 _nc_Free_Argument(typ
->left
,argp
->left
);
182 _nc_Free_Argument(typ
->right
,argp
->right
);
188 typ
->freearg((void *)argp
);
192 /*---------------------------------------------------------------------------
193 | Facility : libnform
194 | Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
196 | Description : Copy argument structure of field src to field dst
198 | Return Values : TRUE - copy worked
199 | FALSE - error occurred
200 +--------------------------------------------------------------------------*/
203 (FIELD
*dst
, FIELD
const *src
)
209 dst
->type
= src
->type
;
210 dst
->arg
= (void *)_nc_Copy_Argument(src
->type
,(TypeArgument
*)(src
->arg
),&err
);
214 _nc_Free_Argument(dst
->type
,(TypeArgument
*)(dst
->arg
));
215 dst
->type
= (FIELDTYPE
*)0;
216 dst
->arg
= (void *)0;
227 /*---------------------------------------------------------------------------
228 | Facility : libnform
229 | Function : void _nc_Free_Type( FIELD *field )
231 | Description : Release Argument structure for this field
234 +--------------------------------------------------------------------------*/
236 _nc_Free_Type (FIELD
*field
)
241 _nc_Free_Argument(field
->type
,(TypeArgument
*)(field
->arg
));
244 /*---------------------------------------------------------------------------
245 | Facility : libnform
246 | Function : FIELD *new_field( int rows, int cols,
247 | int frow, int fcol,
248 | int nrow, int nbuf )
250 | Description : Create a new field with this many 'rows' and 'cols',
251 | starting at 'frow/fcol' in the subwindow of the form.
252 | Allocate 'nrow' off-screen rows and 'nbuf' additional
253 | buffers. If an error occurs, errno is set to
255 | E_BAD_ARGUMENT - invalid argument
256 | E_SYSTEM_ERROR - system error
258 | Return Values : Pointer to the new field or NULL if failure.
259 +--------------------------------------------------------------------------*/
260 NCURSES_EXPORT(FIELD
*)
262 (int rows
, int cols
, int frow
, int fcol
, int nrow
, int nbuf
)
264 FIELD
*New_Field
= (FIELD
*)0;
265 int err
= E_BAD_ARGUMENT
;
273 ((err
= E_SYSTEM_ERROR
) != 0) && /* trick: this resets the default error */
274 (New_Field
=(FIELD
*)malloc(sizeof(FIELD
))) )
276 *New_Field
= default_field
;
277 New_Field
->rows
= rows
;
278 New_Field
->cols
= cols
;
279 New_Field
->drows
= rows
+ nrow
;
280 New_Field
->dcols
= cols
;
281 New_Field
->frow
= frow
;
282 New_Field
->fcol
= fcol
;
283 New_Field
->nrow
= nrow
;
284 New_Field
->nbuf
= nbuf
;
285 New_Field
->link
= New_Field
;
287 if (_nc_Copy_Type(New_Field
,&default_field
))
291 len
= Total_Buffer_Size(New_Field
);
292 if ((New_Field
->buf
= (char *)malloc(len
)))
294 /* Prefill buffers with blanks and insert terminating zeroes
298 memset(New_Field
->buf
,' ',len
);
299 for(i
=0;i
<=New_Field
->nbuf
;i
++)
301 New_Field
->buf
[(New_Field
->drows
*New_Field
->cols
+1)*(i
+1)-1]
310 free_field(New_Field
);
316 /*---------------------------------------------------------------------------
317 | Facility : libnform
318 | Function : int free_field( FIELD *field )
320 | Description : Frees the storage allocated for the field.
322 | Return Values : E_OK - success
323 | E_BAD_ARGUMENT - invalid field pointer
324 | E_CONNECTED - field is connected
325 +--------------------------------------------------------------------------*/
327 free_field (FIELD
* field
)
330 RETURN(E_BAD_ARGUMENT
);
335 if (field
== field
->link
)
344 for(f
=field
;f
->link
!= field
;f
= f
->link
)
346 f
->link
= field
->link
;
348 _nc_Free_Type(field
);
353 /* fld_def.c ends here */