1 /****************************************************************************
2 * Copyright 2020 Thomas E. Dickey *
3 * Copyright 1998-2012,2014 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Juergen Pfeifer, 1995,1997 *
32 ****************************************************************************/
33
34 #include "form.priv.h"
35
36 MODULE_ID("$Id: fld_def.c,v 1.43 2020/05/24 01:40:20 anonymous.maarten Exp $")
37
38 /* this can't be readonly */
39 static FIELD default_field =
40 {
41 0, /* status */
42 0, /* rows */
43 0, /* cols */
44 0, /* frow */
45 0, /* fcol */
46 0, /* drows */
47 0, /* dcols */
48 0, /* maxgrow */
49 0, /* nrow */
50 0, /* nbuf */
51 NO_JUSTIFICATION, /* just */
52 0, /* page */
53 0, /* index */
54 (int)' ', /* pad */
55 A_NORMAL, /* fore */
56 A_NORMAL, /* back */
57 STD_FIELD_OPTS, /* opts */
58 (FIELD *)0, /* snext */
59 (FIELD *)0, /* sprev */
60 (FIELD *)0, /* link */
61 (FORM *)0, /* form */
62 (FIELDTYPE *)0, /* type */
63 (char *)0, /* arg */
64 (FIELD_CELL *)0, /* buf */
65 (char *)0 /* usrptr */
66 NCURSES_FIELD_EXTENSION
67 };
68
69 FORM_EXPORT_VAR(FIELD *) _nc_Default_Field = &default_field;
70
71 /*---------------------------------------------------------------------------
72 | Facility : libnform
73 | Function : TypeArgument *_nc_Make_Argument(
74 | const FIELDTYPE *typ,
75 | va_list *ap,
76 | int *err )
77 |
78 | Description : Create an argument structure for the specified type.
79 | Use the type-dependent argument list to construct
80 | it.
81 |
82 | Return Values : Pointer to argument structure. Maybe NULL.
83 | In case of an error in *err an error counter is increased.
84 +--------------------------------------------------------------------------*/
85 FORM_EXPORT(TypeArgument *)
_nc_Make_Argument(const FIELDTYPE * typ,va_list * ap,int * err)86 _nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err)
87 {
88 TypeArgument *res = (TypeArgument *)0;
89 TypeArgument *p;
90
91 if (typ != 0 && (typ->status & _HAS_ARGS) != 0)
92 {
93 assert(err != 0 && ap != (va_list *)0);
94 if ((typ->status & _LINKED_TYPE) != 0)
95 {
96 p = typeMalloc(TypeArgument, 1);
97
98 if (p != 0)
99 {
100 p->left = _nc_Make_Argument(typ->left, ap, err);
101 p->right = _nc_Make_Argument(typ->right, ap, err);
102 return p;
103 }
104 else
105 {
106 *err += 1;
107 }
108 }
109 else
110 {
111 assert(typ->makearg != (void *)0);
112 if (!(res = (TypeArgument *)typ->makearg(ap)))
113 {
114 *err += 1;
115 }
116 }
117 }
118 return res;
119 }
120
121 /*---------------------------------------------------------------------------
122 | Facility : libnform
123 | Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ,
124 | const TypeArgument *argp,
125 | int *err )
126 |
127 | Description : Create a copy of an argument structure for the specified
128 | type.
129 |
130 | Return Values : Pointer to argument structure. Maybe NULL.
131 | In case of an error in *err an error counter is increased.
132 +--------------------------------------------------------------------------*/
133 FORM_EXPORT(TypeArgument *)
_nc_Copy_Argument(const FIELDTYPE * typ,const TypeArgument * argp,int * err)134 _nc_Copy_Argument(const FIELDTYPE *typ, const TypeArgument *argp, int *err)
135 {
136 TypeArgument *res = (TypeArgument *)0;
137 TypeArgument *p;
138
139 if (typ != 0 && (typ->status & _HAS_ARGS) != 0)
140 {
141 assert(err != 0 && argp != 0);
142 if ((typ->status & _LINKED_TYPE) != 0)
143 {
144 p = typeMalloc(TypeArgument, 1);
145
146 if (p != 0)
147 {
148 p->left = _nc_Copy_Argument(typ, argp->left, err);
149 p->right = _nc_Copy_Argument(typ, argp->right, err);
150 return p;
151 }
152 *err += 1;
153 }
154 else
155 {
156 if (typ->copyarg != (void *)0)
157 {
158 if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp))))
159 {
160 *err += 1;
161 }
162 }
163 else
164 {
165 res = (TypeArgument *)argp;
166 }
167 }
168 }
169 return res;
170 }
171
172 /*---------------------------------------------------------------------------
173 | Facility : libnform
174 | Function : void _nc_Free_Argument(const FIELDTYPE *typ,
175 | TypeArgument * argp )
176 |
177 | Description : Release memory associated with the argument structure
178 | for the given fieldtype.
179 |
180 | Return Values : -
181 +--------------------------------------------------------------------------*/
182 FORM_EXPORT(void)
_nc_Free_Argument(const FIELDTYPE * typ,TypeArgument * argp)183 _nc_Free_Argument(const FIELDTYPE *typ, TypeArgument *argp)
184 {
185 if (typ != 0 && (typ->status & _HAS_ARGS) != 0)
186 {
187 if ((typ->status & _LINKED_TYPE) != 0)
188 {
189 if (argp != 0)
190 {
191 _nc_Free_Argument(typ->left, argp->left);
192 _nc_Free_Argument(typ->right, argp->right);
193 free(argp);
194 }
195 }
196 else
197 {
198 if (typ->freearg != (void *)0)
199 {
200 typ->freearg((void *)argp);
201 }
202 }
203 }
204 }
205
206 /*---------------------------------------------------------------------------
207 | Facility : libnform
208 | Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
209 |
210 | Description : Copy argument structure of field src to field dst
211 |
212 | Return Values : TRUE - copy worked
213 | FALSE - error occurred
214 +--------------------------------------------------------------------------*/
215 FORM_EXPORT(bool)
_nc_Copy_Type(FIELD * dst,FIELD const * src)216 _nc_Copy_Type(FIELD *dst, FIELD const *src)
217 {
218 int err = 0;
219
220 assert(dst != 0 && src != 0);
221
222 dst->type = src->type;
223 dst->arg = (void *)_nc_Copy_Argument(src->type, (TypeArgument *)(src->arg), &err);
224
225 if (err != 0)
226 {
227 _nc_Free_Argument(dst->type, (TypeArgument *)(dst->arg));
228 dst->type = (FIELDTYPE *)0;
229 dst->arg = (void *)0;
230 return FALSE;
231 }
232 else
233 {
234 if (dst->type != 0)
235 {
236 dst->type->ref++;
237 }
238 return TRUE;
239 }
240 }
241
242 /*---------------------------------------------------------------------------
243 | Facility : libnform
244 | Function : void _nc_Free_Type( FIELD *field )
245 |
246 | Description : Release Argument structure for this field
247 |
248 | Return Values : -
249 +--------------------------------------------------------------------------*/
250 FORM_EXPORT(void)
_nc_Free_Type(FIELD * field)251 _nc_Free_Type(FIELD *field)
252 {
253 assert(field != 0);
254 if (field->type != 0)
255 {
256 field->type->ref--;
257 _nc_Free_Argument(field->type, (TypeArgument *)(field->arg));
258 }
259 }
260
261 /*---------------------------------------------------------------------------
262 | Facility : libnform
263 | Function : FIELD *new_field( int rows, int cols,
264 | int frow, int fcol,
265 | int nrow, int nbuf )
266 |
267 | Description : Create a new field with this many 'rows' and 'cols',
268 | starting at 'frow/fcol' in the subwindow of the form.
269 | Allocate 'nrow' off-screen rows and 'nbuf' additional
270 | buffers. If an error occurs, errno is set to
271 |
272 | E_BAD_ARGUMENT - invalid argument
273 | E_SYSTEM_ERROR - system error
274 |
275 | Return Values : Pointer to the new field or NULL if failure.
276 +--------------------------------------------------------------------------*/
277 FORM_EXPORT(FIELD *)
new_field(int rows,int cols,int frow,int fcol,int nrow,int nbuf)278 new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf)
279 {
280 static const FIELD_CELL blank = BLANK;
281 static const FIELD_CELL zeros = ZEROS;
282
283 FIELD *New_Field = (FIELD *)0;
284 int err = E_BAD_ARGUMENT;
285
286 T((T_CALLED("new_field(%d,%d,%d,%d,%d,%d)"), rows, cols, frow, fcol, nrow, nbuf));
287 if (rows > 0 &&
288 cols > 0 &&
289 frow >= 0 &&
290 fcol >= 0 &&
291 nrow >= 0 &&
292 nbuf >= 0 &&
293 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
294 (New_Field = typeMalloc(FIELD, 1)) != 0)
295 {
296 T((T_CREATE("field %p"), (void *)New_Field));
297 *New_Field = default_field;
298 New_Field->rows = (short)rows;
299 New_Field->cols = (short)cols;
300 New_Field->drows = rows + nrow;
301 New_Field->dcols = cols;
302 New_Field->frow = (short)frow;
303 New_Field->fcol = (short)fcol;
304 New_Field->nrow = nrow;
305 New_Field->nbuf = (short)nbuf;
306 New_Field->link = New_Field;
307
308 #if USE_WIDEC_SUPPORT
309 New_Field->working = newpad(1, Buffer_Length(New_Field) + 1);
310 New_Field->expanded = typeCalloc(char *, 1 + (unsigned)nbuf);
311 #endif
312
313 if (_nc_Copy_Type(New_Field, &default_field))
314 {
315 size_t len;
316
317 len = Total_Buffer_Size(New_Field);
318 if ((New_Field->buf = (FIELD_CELL *)malloc(len)))
319 {
320 /* Prefill buffers with blanks and insert terminating zeroes
321 between buffers */
322 int i, j;
323 int cells = Buffer_Length(New_Field);
324
325 for (i = 0; i <= New_Field->nbuf; i++)
326 {
327 FIELD_CELL *buffer = &(New_Field->buf[(cells + 1) * i]);
328
329 for (j = 0; j < cells; ++j)
330 {
331 buffer[j] = blank;
332 }
333 buffer[j] = zeros;
334 }
335 returnField(New_Field);
336 }
337 }
338 }
339
340 if (New_Field)
341 free_field(New_Field);
342
343 SET_ERROR(err);
344 returnField((FIELD *)0);
345 }
346
347 /*---------------------------------------------------------------------------
348 | Facility : libnform
349 | Function : int free_field( FIELD *field )
350 |
351 | Description : Frees the storage allocated for the field.
352 |
353 | Return Values : E_OK - success
354 | E_BAD_ARGUMENT - invalid field pointer
355 | E_CONNECTED - field is connected
356 +--------------------------------------------------------------------------*/
357 FORM_EXPORT(int)
free_field(FIELD * field)358 free_field(FIELD *field)
359 {
360 T((T_CALLED("free_field(%p)"), (void *)field));
361 if (!field)
362 {
363 RETURN(E_BAD_ARGUMENT);
364 }
365 else if (field->form != 0)
366 {
367 RETURN(E_CONNECTED);
368 }
369 else if (field == field->link)
370 {
371 if (field->buf != 0)
372 free(field->buf);
373 }
374 else
375 {
376 FIELD *f;
377
378 for (f = field; f->link != field; f = f->link)
379 {
380 }
381 f->link = field->link;
382 }
383 _nc_Free_Type(field);
384 #if USE_WIDEC_SUPPORT
385 if (field->expanded != 0)
386 {
387 int n;
388
389 for (n = 0; n <= field->nbuf; ++n)
390 {
391 FreeIfNeeded(field->expanded[n]);
392 }
393 free(field->expanded);
394 (void)delwin(field->working);
395 }
396 #endif
397 free(field);
398 RETURN(E_OK);
399 }
400
401 /* fld_def.c ends here */
402