source: trunk/essentials/sys-libs/ncurses/form/fld_def.c@ 3125

Last change on this file since 3125 was 2621, checked in by bird, 20 years ago

GNU ncurses 5.5
File size: 12.0 KB
Line 
1/****************************************************************************
2 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. *
3 * *
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: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
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. *
22 * *
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 *
26 * authorization. *
27 ****************************************************************************/
28
29/****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
32
33#include "form.priv.h"
34
35MODULE_ID("$Id: fld_def.c,v 1.33 2005/04/16 17:31:17 tom Exp $")
36
37/* this can't be readonly */
38static FIELD default_field =
39{
40 0, /* status */
41 0, /* rows */
42 0, /* cols */
43 0, /* frow */
44 0, /* fcol */
45 0, /* drows */
46 0, /* dcols */
47 0, /* maxgrow */
48 0, /* nrow */
49 0, /* nbuf */
50 NO_JUSTIFICATION, /* just */
51 0, /* page */
52 0, /* index */
53 (int)' ', /* pad */
54 A_NORMAL, /* fore */
55 A_NORMAL, /* back */
56 ALL_FIELD_OPTS, /* opts */
57 (FIELD *)0, /* snext */
58 (FIELD *)0, /* sprev */
59 (FIELD *)0, /* link */
60 (FORM *)0, /* form */
61 (FIELDTYPE *)0, /* type */
62 (char *)0, /* arg */
63 (FIELD_CELL *)0, /* buf */
64 (char *)0 /* usrptr */
65 NCURSES_FIELD_EXTENSION
66};
67
68NCURSES_EXPORT_VAR(FIELD *)
69_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+--------------------------------------------------------------------------*/
85NCURSES_EXPORT(TypeArgument *)
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 = (TypeArgument *)malloc(sizeof(TypeArgument));
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+--------------------------------------------------------------------------*/
133NCURSES_EXPORT(TypeArgument *)
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 = (TypeArgument *)malloc(sizeof(TypeArgument));
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+--------------------------------------------------------------------------*/
182NCURSES_EXPORT(void)
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 assert(argp != 0);
190 _nc_Free_Argument(typ->left, argp->left);
191 _nc_Free_Argument(typ->right, argp->right);
192 free(argp);
193 }
194 else
195 {
196 if (typ->freearg != (void *)0)
197 {
198 typ->freearg((void *)argp);
199 }
200 }
201 }
202}
203
204/*---------------------------------------------------------------------------
205| Facility : libnform
206| Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
207|
208| Description : Copy argument structure of field src to field dst
209|
210| Return Values : TRUE - copy worked
211| FALSE - error occurred
212+--------------------------------------------------------------------------*/
213NCURSES_EXPORT(bool)
214_nc_Copy_Type(FIELD *dst, FIELD const *src)
215{
216 int err = 0;
217
218 assert(dst != 0 && src != 0);
219
220 dst->type = src->type;
221 dst->arg = (void *)_nc_Copy_Argument(src->type, (TypeArgument *)(src->arg), &err);
222
223 if (err != 0)
224 {
225 _nc_Free_Argument(dst->type, (TypeArgument *)(dst->arg));
226 dst->type = (FIELDTYPE *)0;
227 dst->arg = (void *)0;
228 return FALSE;
229 }
230 else
231 {
232 if (dst->type != 0)
233 {
234 dst->type->ref++;
235 }
236 return TRUE;
237 }
238}
239
240/*---------------------------------------------------------------------------
241| Facility : libnform
242| Function : void _nc_Free_Type( FIELD *field )
243|
244| Description : Release Argument structure for this field
245|
246| Return Values : -
247+--------------------------------------------------------------------------*/
248NCURSES_EXPORT(void)
249_nc_Free_Type(FIELD *field)
250{
251 assert(field != 0);
252 if (field->type != 0)
253 {
254 field->type->ref--;
255 }
256 _nc_Free_Argument(field->type, (TypeArgument *)(field->arg));
257}
258
259/*---------------------------------------------------------------------------
260| Facility : libnform
261| Function : FIELD *new_field( int rows, int cols,
262| int frow, int fcol,
263| int nrow, int nbuf )
264|
265| Description : Create a new field with this many 'rows' and 'cols',
266| starting at 'frow/fcol' in the subwindow of the form.
267| Allocate 'nrow' off-screen rows and 'nbuf' additional
268| buffers. If an error occurs, errno is set to
269|
270| E_BAD_ARGUMENT - invalid argument
271| E_SYSTEM_ERROR - system error
272|
273| Return Values : Pointer to the new field or NULL if failure.
274+--------------------------------------------------------------------------*/
275NCURSES_EXPORT(FIELD *)
276new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf)
277{
278 static const FIELD_CELL blank = BLANK;
279 static const FIELD_CELL zeros = ZEROS;
280
281 FIELD *New_Field = (FIELD *)0;
282 int err = E_BAD_ARGUMENT;
283
284 T((T_CALLED("new_field(%d,%d,%d,%d,%d,%d)"), rows, cols, frow, fcol, nrow, nbuf));
285 if (rows > 0 &&
286 cols > 0 &&
287 frow >= 0 &&
288 fcol >= 0 &&
289 nrow >= 0 &&
290 nbuf >= 0 &&
291 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
292 (New_Field = (FIELD *)malloc(sizeof(FIELD))) != 0)
293 {
294 *New_Field = default_field;
295 New_Field->rows = rows;
296 New_Field->cols = cols;
297 New_Field->drows = rows + nrow;
298 New_Field->dcols = cols;
299 New_Field->frow = frow;
300 New_Field->fcol = fcol;
301 New_Field->nrow = nrow;
302 New_Field->nbuf = nbuf;
303 New_Field->link = New_Field;
304
305#if USE_WIDEC_SUPPORT
306 New_Field->working = newpad(1, Buffer_Length(New_Field) + 1);
307 New_Field->expanded = (char **)calloc(1 + (unsigned)rows, sizeof(char *));
308#endif
309
310 if (_nc_Copy_Type(New_Field, &default_field))
311 {
312 size_t len;
313
314 len = Total_Buffer_Size(New_Field);
315 if ((New_Field->buf = (FIELD_CELL *)malloc(len)))
316 {
317 /* Prefill buffers with blanks and insert terminating zeroes
318 between buffers */
319 int i, j;
320 int cells = Buffer_Length(New_Field);
321
322 for (i = 0; i <= New_Field->nbuf; i++)
323 {
324 FIELD_CELL *buffer = &(New_Field->buf[(cells + 1) * i]);
325
326 for (j = 0; j < cells; ++j)
327 {
328 buffer[j] = blank;
329 }
330 buffer[j] = zeros;
331 }
332 returnField(New_Field);
333 }
334 }
335 }
336
337 if (New_Field)
338 free_field(New_Field);
339
340 SET_ERROR(err);
341 returnField((FIELD *)0);
342}
343
344/*---------------------------------------------------------------------------
345| Facility : libnform
346| Function : int free_field( FIELD *field )
347|
348| Description : Frees the storage allocated for the field.
349|
350| Return Values : E_OK - success
351| E_BAD_ARGUMENT - invalid field pointer
352| E_CONNECTED - field is connected
353+--------------------------------------------------------------------------*/
354NCURSES_EXPORT(int)
355free_field(FIELD *field)
356{
357 T((T_CALLED("free_field(%p)"), field));
358 if (!field)
359 {
360 RETURN(E_BAD_ARGUMENT);
361 }
362 else if (field->form != 0)
363 {
364 RETURN(E_CONNECTED);
365 }
366 else if (field == field->link)
367 {
368 if (field->buf != 0)
369 free(field->buf);
370 }
371 else
372 {
373 FIELD *f;
374
375 for (f = field; f->link != field; f = f->link)
376 {
377 }
378 f->link = field->link;
379 }
380 _nc_Free_Type(field);
381#if USE_WIDEC_SUPPORT
382 if (field->expanded != 0)
383 {
384 int n;
385
386 for (n = 0; n <= field->nbuf; ++n)
387 {
388 FreeIfNeeded(field->expanded[n]);
389 }
390 free(field->expanded);
391 (void)delwin(field->working);
392 }
393#endif
394 free(field);
395 RETURN(E_OK);
396}
397
398/* fld_def.c ends here */
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