1 /****************************************************************************
2 * Copyright (c) 1998 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 *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
31 ****************************************************************************/
33 #include "form.priv.h"
35 MODULE_ID("$Id: fld_def.c,v 1.12 1999/05/16 17:37:48 juergen 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 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-dependant argument list to construct
79 | Return Values : Pointer to argument structure. Maybe NULL.
80 | In case of an error in *err an errorcounter is increased.
81 +--------------------------------------------------------------------------*/
83 _nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err)
85 TypeArgument *res = (TypeArgument *)0;
88 if (typ && (typ->status & _HAS_ARGS))
91 if (typ->status & _LINKED_TYPE)
93 p = (TypeArgument *)malloc(sizeof(TypeArgument));
96 p->left = _nc_Make_Argument(typ->left ,ap,err);
97 p->right = _nc_Make_Argument(typ->right,ap,err);
104 assert(typ->makearg);
105 if ( !(res=(TypeArgument *)typ->makearg(ap)) )
112 /*---------------------------------------------------------------------------
113 | Facility : libnform
114 | Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ,
115 | const TypeArgument *argp,
118 | Description : Create a copy of an argument structure for the specified
121 | Return Values : Pointer to argument structure. Maybe NULL.
122 | In case of an error in *err an errorcounter is increased.
123 +--------------------------------------------------------------------------*/
125 _nc_Copy_Argument(const FIELDTYPE *typ,
126 const TypeArgument *argp, int *err)
128 TypeArgument *res = (TypeArgument *)0;
131 if ( typ && (typ->status & _HAS_ARGS) )
134 if (typ->status & _LINKED_TYPE)
136 p = (TypeArgument *)malloc(sizeof(TypeArgument));
139 p->left = _nc_Copy_Argument(typ,argp->left ,err);
140 p->right = _nc_Copy_Argument(typ,argp->right,err);
149 if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp))))
153 res = (TypeArgument *)argp;
159 /*---------------------------------------------------------------------------
160 | Facility : libnform
161 | Function : void _nc_Free_Argument(const FIELDTYPE *typ,
162 | TypeArgument * argp )
164 | Description : Release memory associated with the argument structure
165 | for the given fieldtype.
168 +--------------------------------------------------------------------------*/
170 _nc_Free_Argument(const FIELDTYPE * typ, TypeArgument * argp)
172 if (!typ || !(typ->status & _HAS_ARGS))
175 if (typ->status & _LINKED_TYPE)
178 _nc_Free_Argument(typ->left ,argp->left );
179 _nc_Free_Argument(typ->right,argp->right);
185 typ->freearg((void *)argp);
189 /*---------------------------------------------------------------------------
190 | Facility : libnform
191 | Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
193 | Description : Copy argument structure of field src to field dst
195 | Return Values : TRUE - copy worked
196 | FALSE - error occured
197 +--------------------------------------------------------------------------*/
199 _nc_Copy_Type(FIELD *dst, FIELD const *src)
205 dst->type = src->type;
206 dst->arg = (void *)_nc_Copy_Argument(src->type,(TypeArgument *)(src->arg),&err);
210 _nc_Free_Argument(dst->type,(TypeArgument *)(dst->arg));
211 dst->type = (FIELDTYPE *)0;
212 dst->arg = (void *)0;
223 /*---------------------------------------------------------------------------
224 | Facility : libnform
225 | Function : void _nc_Free_Type( FIELD *field )
227 | Description : Release Argument structure for this field
230 +--------------------------------------------------------------------------*/
232 _nc_Free_Type(FIELD *field)
237 _nc_Free_Argument(field->type,(TypeArgument *)(field->arg));
240 /*---------------------------------------------------------------------------
241 | Facility : libnform
242 | Function : FIELD *new_field( int rows, int cols,
243 | int frow, int fcol,
244 | int nrow, int nbuf )
246 | Description : Create a new field with this many 'rows' and 'cols',
247 | starting at 'frow/fcol' in the subwindow of the form.
248 | Allocate 'nrow' off-screen rows and 'nbuf' additional
249 | buffers. If an error occurs, errno is set to
251 | E_BAD_ARGUMENT - invalid argument
252 | E_SYSTEM_ERROR - system error
254 | Return Values : Pointer to the new field or NULL if failure.
255 +--------------------------------------------------------------------------*/
256 FIELD *new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf)
258 FIELD *New_Field = (FIELD *)0;
259 int err = E_BAD_ARGUMENT;
267 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
268 (New_Field=(FIELD *)malloc(sizeof(FIELD))) )
270 *New_Field = default_field;
271 New_Field->rows = rows;
272 New_Field->cols = cols;
273 New_Field->drows = rows + nrow;
274 New_Field->dcols = cols;
275 New_Field->frow = frow;
276 New_Field->fcol = fcol;
277 New_Field->nrow = nrow;
278 New_Field->nbuf = nbuf;
279 New_Field->link = New_Field;
281 if (_nc_Copy_Type(New_Field,&default_field))
285 len = Total_Buffer_Size(New_Field);
286 if ((New_Field->buf = (char *)malloc(len)))
288 /* Prefill buffers with blanks and insert terminating zeroes
292 memset(New_Field->buf,' ',len);
293 for(i=0;i<=New_Field->nbuf;i++)
295 New_Field->buf[(New_Field->drows*New_Field->cols+1)*(i+1)-1]
304 free_field(New_Field);
310 /*---------------------------------------------------------------------------
311 | Facility : libnform
312 | Function : int free_field( FIELD *field )
314 | Description : Frees the storage allocated for the field.
316 | Return Values : E_OK - success
317 | E_BAD_ARGUMENT - invalid field pointer
318 | E_CONNECTED - field is connected
319 +--------------------------------------------------------------------------*/
320 int free_field(FIELD * field)
323 RETURN(E_BAD_ARGUMENT);
328 if (field == field->link)
337 for(f=field;f->link != field;f = f->link)
339 f->link = field->link;
341 _nc_Free_Type(field);
346 /* fld_def.c ends here */