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isl_basic_set_total_dim: handle NULL input
[isl.git] / isl_space.c
blob48f638558b54b1233a779482b6cebe6b6527251a
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 *
5 * Use of this software is governed by the GNU LGPLv2.1 license
6 *
7 * Written by Sven Verdoolaege, K.U.Leuven, Departement
8 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
9 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
10 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
11 */
12
13 #include <stdlib.h>
14 #include <isl_space_private.h>
15 #include <isl_id_private.h>
16 #include <isl_reordering.h>
17
18 isl_ctx *isl_space_get_ctx(__isl_keep isl_space *dim)
19 {
20 return dim ? dim->ctx : NULL;
21 }
22
23 __isl_give isl_space *isl_space_alloc(isl_ctx *ctx,
24 unsigned nparam, unsigned n_in, unsigned n_out)
25 {
26 isl_space *dim;
27
28 dim = isl_alloc_type(ctx, struct isl_space);
29 if (!dim)
30 return NULL;
31
32 dim->ctx = ctx;
33 isl_ctx_ref(ctx);
34 dim->ref = 1;
35 dim->nparam = nparam;
36 dim->n_in = n_in;
37 dim->n_out = n_out;
38
39 dim->tuple_id[0] = NULL;
40 dim->tuple_id[1] = NULL;
41
42 dim->nested[0] = NULL;
43 dim->nested[1] = NULL;
44
45 dim->n_id = 0;
46 dim->ids = NULL;
47
48 return dim;
49 }
50
51 /* Mark the space as being that of a set, by setting the domain tuple
52 * to isl_id_none.
53 */
54 static __isl_give isl_space *mark_as_set(__isl_take isl_space *space)
55 {
56 space = isl_space_cow(space);
57 if (!space)
58 return NULL;
59 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
60 return space;
61 }
62
63 /* Is the space that of a set?
64 */
65 int isl_space_is_set(__isl_keep isl_space *space)
66 {
67 if (!space)
68 return -1;
69 if (space->n_in != 0 || space->nested[0])
70 return 0;
71 if (space->tuple_id[0] != &isl_id_none)
72 return 0;
73 return 1;
74 }
75
76 __isl_give isl_space *isl_space_set_alloc(isl_ctx *ctx,
77 unsigned nparam, unsigned dim)
78 {
79 isl_space *space;
80 space = isl_space_alloc(ctx, nparam, 0, dim);
81 space = mark_as_set(space);
82 return space;
83 }
84
85 /* Mark the space as being that of a parameter domain, by setting
86 * both tuples to isl_id_none.
87 */
88 static __isl_give isl_space *mark_as_params(isl_space *space)
89 {
90 if (!space)
91 return NULL;
92 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
93 space = isl_space_set_tuple_id(space, isl_dim_out, &isl_id_none);
94 return space;
95 }
96
97 /* Is the space that of a parameter domain?
98 */
99 int isl_space_is_params(__isl_keep isl_space *space)
100 {
101 if (!space)
102 return -1;
103 if (space->n_in != 0 || space->nested[0] ||
104 space->n_out != 0 || space->nested[1])
105 return 0;
106 if (space->tuple_id[0] != &isl_id_none)
107 return 0;
108 if (space->tuple_id[1] != &isl_id_none)
109 return 0;
110 return 1;
111 }
112
113 /* Create a space for a parameter domain.
114 */
115 __isl_give isl_space *isl_space_params_alloc(isl_ctx *ctx, unsigned nparam)
116 {
117 isl_space *space;
118 space = isl_space_alloc(ctx, nparam, 0, 0);
119 space = mark_as_params(space);
120 return space;
121 }
122
123 static unsigned global_pos(__isl_keep isl_space *dim,
124 enum isl_dim_type type, unsigned pos)
125 {
126 struct isl_ctx *ctx = dim->ctx;
127
128 switch (type) {
129 case isl_dim_param:
130 isl_assert(ctx, pos < dim->nparam,
131 return isl_space_dim(dim, isl_dim_all));
132 return pos;
133 case isl_dim_in:
134 isl_assert(ctx, pos < dim->n_in,
135 return isl_space_dim(dim, isl_dim_all));
136 return pos + dim->nparam;
137 case isl_dim_out:
138 isl_assert(ctx, pos < dim->n_out,
139 return isl_space_dim(dim, isl_dim_all));
140 return pos + dim->nparam + dim->n_in;
141 default:
142 isl_assert(ctx, 0, return isl_space_dim(dim, isl_dim_all));
143 }
144 return isl_space_dim(dim, isl_dim_all);
145 }
146
147 /* Extend length of ids array to the total number of dimensions.
148 */
149 static __isl_give isl_space *extend_ids(__isl_take isl_space *dim)
150 {
151 isl_id **ids;
152 int i;
153
154 if (isl_space_dim(dim, isl_dim_all) <= dim->n_id)
155 return dim;
156
157 if (!dim->ids) {
158 dim->ids = isl_calloc_array(dim->ctx,
159 isl_id *, isl_space_dim(dim, isl_dim_all));
160 if (!dim->ids)
161 goto error;
162 } else {
163 ids = isl_realloc_array(dim->ctx, dim->ids,
164 isl_id *, isl_space_dim(dim, isl_dim_all));
165 if (!ids)
166 goto error;
167 dim->ids = ids;
168 for (i = dim->n_id; i < isl_space_dim(dim, isl_dim_all); ++i)
169 dim->ids[i] = NULL;
170 }
171
172 dim->n_id = isl_space_dim(dim, isl_dim_all);
173
174 return dim;
175 error:
176 isl_space_free(dim);
177 return NULL;
178 }
179
180 static __isl_give isl_space *set_id(__isl_take isl_space *dim,
181 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
182 {
183 dim = isl_space_cow(dim);
184
185 if (!dim)
186 goto error;
187
188 pos = global_pos(dim, type, pos);
189 if (pos == isl_space_dim(dim, isl_dim_all))
190 goto error;
191
192 if (pos >= dim->n_id) {
193 if (!id)
194 return dim;
195 dim = extend_ids(dim);
196 if (!dim)
197 goto error;
198 }
199
200 dim->ids[pos] = id;
201
202 return dim;
203 error:
204 isl_id_free(id);
205 isl_space_free(dim);
206 return NULL;
207 }
208
209 static __isl_keep isl_id *get_id(__isl_keep isl_space *dim,
210 enum isl_dim_type type, unsigned pos)
211 {
212 if (!dim)
213 return NULL;
214
215 pos = global_pos(dim, type, pos);
216 if (pos == isl_space_dim(dim, isl_dim_all))
217 return NULL;
218 if (pos >= dim->n_id)
219 return NULL;
220 return dim->ids[pos];
221 }
222
223 static unsigned offset(__isl_keep isl_space *dim, enum isl_dim_type type)
224 {
225 switch (type) {
226 case isl_dim_param: return 0;
227 case isl_dim_in: return dim->nparam;
228 case isl_dim_out: return dim->nparam + dim->n_in;
229 default: return 0;
230 }
231 }
232
233 static unsigned n(__isl_keep isl_space *dim, enum isl_dim_type type)
234 {
235 switch (type) {
236 case isl_dim_param: return dim->nparam;
237 case isl_dim_in: return dim->n_in;
238 case isl_dim_out: return dim->n_out;
239 case isl_dim_all: return dim->nparam + dim->n_in + dim->n_out;
240 default: return 0;
241 }
242 }
243
244 unsigned isl_space_dim(__isl_keep isl_space *dim, enum isl_dim_type type)
245 {
246 if (!dim)
247 return 0;
248 return n(dim, type);
249 }
250
251 unsigned isl_space_offset(__isl_keep isl_space *dim, enum isl_dim_type type)
252 {
253 if (!dim)
254 return 0;
255 return offset(dim, type);
256 }
257
258 static __isl_give isl_space *copy_ids(__isl_take isl_space *dst,
259 enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_space *src,
260 enum isl_dim_type src_type)
261 {
262 int i;
263 isl_id *id;
264
265 if (!dst)
266 return NULL;
267
268 for (i = 0; i < n(src, src_type); ++i) {
269 id = get_id(src, src_type, i);
270 if (!id)
271 continue;
272 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
273 if (!dst)
274 return NULL;
275 }
276 return dst;
277 }
278
279 __isl_take isl_space *isl_space_dup(__isl_keep isl_space *dim)
280 {
281 isl_space *dup;
282 if (!dim)
283 return NULL;
284 dup = isl_space_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
285 if (dim->tuple_id[0] &&
286 !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
287 goto error;
288 if (dim->tuple_id[1] &&
289 !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
290 goto error;
291 if (dim->nested[0] && !(dup->nested[0] = isl_space_copy(dim->nested[0])))
292 goto error;
293 if (dim->nested[1] && !(dup->nested[1] = isl_space_copy(dim->nested[1])))
294 goto error;
295 if (!dim->ids)
296 return dup;
297 dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
298 dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
299 dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
300 return dup;
301 error:
302 isl_space_free(dup);
303 return NULL;
304 }
305
306 __isl_give isl_space *isl_space_cow(__isl_take isl_space *dim)
307 {
308 if (!dim)
309 return NULL;
310
311 if (dim->ref == 1)
312 return dim;
313 dim->ref--;
314 return isl_space_dup(dim);
315 }
316
317 __isl_give isl_space *isl_space_copy(__isl_keep isl_space *dim)
318 {
319 if (!dim)
320 return NULL;
321
322 dim->ref++;
323 return dim;
324 }
325
326 void isl_space_free(__isl_take isl_space *dim)
327 {
328 int i;
329
330 if (!dim)
331 return;
332
333 if (--dim->ref > 0)
334 return;
335
336 isl_id_free(dim->tuple_id[0]);
337 isl_id_free(dim->tuple_id[1]);
338
339 isl_space_free(dim->nested[0]);
340 isl_space_free(dim->nested[1]);
341
342 for (i = 0; i < dim->n_id; ++i)
343 isl_id_free(dim->ids[i]);
344 free(dim->ids);
345 isl_ctx_deref(dim->ctx);
346
347 free(dim);
348 }
349
350 static int name_ok(isl_ctx *ctx, const char *s)
351 {
352 char *p;
353 long dummy;
354
355 dummy = strtol(s, &p, 0);
356 if (p != s)
357 isl_die(ctx, isl_error_invalid, "name looks like a number",
358 return 0);
359
360 return 1;
361 }
362
363 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
364 {
365 if (!dim)
366 return -1;
367 if (isl_space_is_params(dim))
368 isl_die(dim->ctx, isl_error_invalid,
369 "parameter spaces don't have tuple ids", return -1);
370 if (isl_space_is_set(dim) && type != isl_dim_set)
371 isl_die(dim->ctx, isl_error_invalid,
372 "set spaces can only have a set id", return -1);
373 if (type != isl_dim_in && type != isl_dim_out)
374 isl_die(dim->ctx, isl_error_invalid,
375 "only input, output and set tuples can have ids",
376 return -1);
377 return dim->tuple_id[type - isl_dim_in] != NULL;
378 }
379
380 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
381 enum isl_dim_type type)
382 {
383 int has_id;
384
385 if (!dim)
386 return NULL;
387 has_id = isl_space_has_tuple_id(dim, type);
388 if (has_id < 0)
389 return NULL;
390 if (!has_id)
391 isl_die(dim->ctx, isl_error_invalid,
392 "tuple has no id", return NULL);
393 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
394 }
395
396 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
397 enum isl_dim_type type, __isl_take isl_id *id)
398 {
399 dim = isl_space_cow(dim);
400 if (!dim || !id)
401 goto error;
402 if (type != isl_dim_in && type != isl_dim_out)
403 isl_die(dim->ctx, isl_error_invalid,
404 "only input, output and set tuples can have names",
405 goto error);
406
407 isl_id_free(dim->tuple_id[type - isl_dim_in]);
408 dim->tuple_id[type - isl_dim_in] = id;
409
410 return dim;
411 error:
412 isl_id_free(id);
413 isl_space_free(dim);
414 return NULL;
415 }
416
417 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
418 enum isl_dim_type type)
419 {
420 dim = isl_space_cow(dim);
421 if (!dim)
422 return NULL;
423 if (type != isl_dim_in && type != isl_dim_out)
424 isl_die(dim->ctx, isl_error_invalid,
425 "only input, output and set tuples can have names",
426 goto error);
427
428 isl_id_free(dim->tuple_id[type - isl_dim_in]);
429 dim->tuple_id[type - isl_dim_in] = NULL;
430
431 return dim;
432 error:
433 isl_space_free(dim);
434 return NULL;
435 }
436
437 /* Set the id of the given dimension of "space" to "id".
438 * If the dimension already has an id, then it is replaced.
439 * If the dimension is a parameter, then we need to change it
440 * in the nested spaces (if any) as well.
441 */
442 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
443 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
444 {
445 space = isl_space_cow(space);
446 if (!space || !id)
447 goto error;
448
449 if (type == isl_dim_param) {
450 int i;
451
452 for (i = 0; i < 2; ++i) {
453 if (!space->nested[i])
454 continue;
455 space->nested[i] =
456 isl_space_set_dim_id(space->nested[i],
457 type, pos, isl_id_copy(id));
458 if (!space->nested[i])
459 goto error;
460 }
461 }
462
463 isl_id_free(get_id(space, type, pos));
464 return set_id(space, type, pos, id);
465 error:
466 isl_id_free(id);
467 isl_space_free(space);
468 return NULL;
469 }
470
471 int isl_space_has_dim_id(__isl_keep isl_space *dim,
472 enum isl_dim_type type, unsigned pos)
473 {
474 if (!dim)
475 return -1;
476 return get_id(dim, type, pos) != NULL;
477 }
478
479 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
480 enum isl_dim_type type, unsigned pos)
481 {
482 if (!dim)
483 return NULL;
484 if (!get_id(dim, type, pos))
485 isl_die(dim->ctx, isl_error_invalid,
486 "dim has no id", return NULL);
487 return isl_id_copy(get_id(dim, type, pos));
488 }
489
490 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
491 enum isl_dim_type type, const char *s)
492 {
493 isl_id *id;
494
495 if (!dim)
496 return NULL;
497
498 if (!s)
499 return isl_space_reset_tuple_id(dim, type);
500
501 if (!name_ok(dim->ctx, s))
502 goto error;
503
504 id = isl_id_alloc(dim->ctx, s, NULL);
505 return isl_space_set_tuple_id(dim, type, id);
506 error:
507 isl_space_free(dim);
508 return NULL;
509 }
510
511 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
512 enum isl_dim_type type)
513 {
514 isl_id *id;
515 if (!dim)
516 return NULL;
517 if (type != isl_dim_in && type != isl_dim_out)
518 return NULL;
519 id = dim->tuple_id[type - isl_dim_in];
520 return id ? id->name : NULL;
521 }
522
523 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
524 enum isl_dim_type type, unsigned pos,
525 const char *s)
526 {
527 isl_id *id;
528
529 if (!dim)
530 return NULL;
531 if (!name_ok(dim->ctx, s))
532 goto error;
533 id = isl_id_alloc(dim->ctx, s, NULL);
534 return isl_space_set_dim_id(dim, type, pos, id);
535 error:
536 isl_space_free(dim);
537 return NULL;
538 }
539
540 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
541 enum isl_dim_type type, unsigned pos)
542 {
543 isl_id *id = get_id(dim, type, pos);
544 return id ? id->name : NULL;
545 }
546
547 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
548 __isl_keep isl_id *id)
549 {
550 int i;
551 int offset;
552 int n;
553
554 if (!dim || !id)
555 return -1;
556
557 offset = isl_space_offset(dim, type);
558 n = isl_space_dim(dim, type);
559 for (i = 0; i < n && offset + i < dim->n_id; ++i)
560 if (dim->ids[offset + i] == id)
561 return i;
562
563 return -1;
564 }
565
566 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
567 enum isl_dim_type type, const char *name)
568 {
569 int i;
570 int offset;
571 int n;
572
573 if (!space || !name)
574 return -1;
575
576 offset = isl_space_offset(space, type);
577 n = isl_space_dim(space, type);
578 for (i = 0; i < n && offset + i < space->n_id; ++i)
579 if (space->ids[offset + i]->name &&
580 !strcmp(space->ids[offset + i]->name, name))
581 return i;
582
583 return -1;
584 }
585
586 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
587 enum isl_dim_type type)
588 {
589 if (!dim)
590 return NULL;
591 if (type == isl_dim_in)
592 return dim->tuple_id[0];
593 if (type == isl_dim_out)
594 return dim->tuple_id[1];
595 return NULL;
596 }
597
598 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
599 enum isl_dim_type type)
600 {
601 if (!dim)
602 return NULL;
603 if (type == isl_dim_in)
604 return dim->nested[0];
605 if (type == isl_dim_out)
606 return dim->nested[1];
607 return NULL;
608 }
609
610 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
611 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
612 {
613 isl_id *id1, *id2;
614 isl_space *nested1, *nested2;
615
616 if (!dim1 || !dim2)
617 return -1;
618
619 if (dim1 == dim2 && dim1_type == dim2_type)
620 return 1;
621
622 if (n(dim1, dim1_type) != n(dim2, dim2_type))
623 return 0;
624 id1 = tuple_id(dim1, dim1_type);
625 id2 = tuple_id(dim2, dim2_type);
626 if (!id1 ^ !id2)
627 return 0;
628 if (id1 && id1 != id2)
629 return 0;
630 nested1 = nested(dim1, dim1_type);
631 nested2 = nested(dim2, dim2_type);
632 if (!nested1 ^ !nested2)
633 return 0;
634 if (nested1 && !isl_space_is_equal(nested1, nested2))
635 return 0;
636 return 1;
637 }
638
639 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
640 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
641 {
642 int i;
643
644 if (dim1 == dim2 && dim1_type == dim2_type)
645 return 1;
646
647 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
648 return 0;
649
650 if (!dim1->ids && !dim2->ids)
651 return 1;
652
653 for (i = 0; i < n(dim1, dim1_type); ++i) {
654 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
655 return 0;
656 }
657 return 1;
658 }
659
660 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
661 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
662 {
663 if (!dim1 || !dim2)
664 return -1;
665
666 return match(dim1, dim1_type, dim2, dim2_type);
667 }
668
669 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
670 unsigned first, unsigned n, __isl_keep isl_id **ids)
671 {
672 int i;
673
674 for (i = 0; i < n ; ++i)
675 ids[i] = get_id(dim, type, first + i);
676 }
677
678 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
679 unsigned nparam, unsigned n_in, unsigned n_out)
680 {
681 isl_id **ids = NULL;
682
683 if (!dim)
684 return NULL;
685 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
686 return dim;
687
688 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
689 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
690 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
691
692 dim = isl_space_cow(dim);
693
694 if (dim->ids) {
695 ids = isl_calloc_array(dim->ctx, isl_id *,
696 nparam + n_in + n_out);
697 if (!ids)
698 goto error;
699 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
700 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
701 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
702 free(dim->ids);
703 dim->ids = ids;
704 dim->n_id = nparam + n_in + n_out;
705 }
706 dim->nparam = nparam;
707 dim->n_in = n_in;
708 dim->n_out = n_out;
709
710 return dim;
711 error:
712 free(ids);
713 isl_space_free(dim);
714 return NULL;
715 }
716
717 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
718 enum isl_dim_type type, unsigned n)
719 {
720 if (!dim)
721 return NULL;
722 dim = isl_space_reset(dim, type);
723 switch (type) {
724 case isl_dim_param:
725 dim = isl_space_extend(dim,
726 dim->nparam + n, dim->n_in, dim->n_out);
727 if (dim && dim->nested[0] &&
728 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
729 isl_dim_param, n)))
730 goto error;
731 if (dim && dim->nested[1] &&
732 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
733 isl_dim_param, n)))
734 goto error;
735 return dim;
736 case isl_dim_in:
737 return isl_space_extend(dim,
738 dim->nparam, dim->n_in + n, dim->n_out);
739 case isl_dim_out:
740 return isl_space_extend(dim,
741 dim->nparam, dim->n_in, dim->n_out + n);
742 default:
743 isl_die(dim->ctx, isl_error_invalid,
744 "cannot add dimensions of specified type", goto error);
745 }
746 error:
747 isl_space_free(dim);
748 return NULL;
749 }
750
751 static int valid_dim_type(enum isl_dim_type type)
752 {
753 switch (type) {
754 case isl_dim_param:
755 case isl_dim_in:
756 case isl_dim_out:
757 return 1;
758 default:
759 return 0;
760 }
761 }
762
763 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
764 enum isl_dim_type type, unsigned pos, unsigned n)
765 {
766 isl_id **ids = NULL;
767
768 if (!dim)
769 return NULL;
770 if (n == 0)
771 return isl_space_reset(dim, type);
772
773 if (!valid_dim_type(type))
774 isl_die(dim->ctx, isl_error_invalid,
775 "cannot insert dimensions of specified type",
776 goto error);
777
778 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
779
780 dim = isl_space_cow(dim);
781 if (!dim)
782 return NULL;
783
784 if (dim->ids) {
785 enum isl_dim_type t;
786 int off;
787 int s[3];
788 int *size = s - isl_dim_param;
789 ids = isl_calloc_array(dim->ctx, isl_id *,
790 dim->nparam + dim->n_in + dim->n_out + n);
791 if (!ids)
792 goto error;
793 off = 0;
794 size[isl_dim_param] = dim->nparam;
795 size[isl_dim_in] = dim->n_in;
796 size[isl_dim_out] = dim->n_out;
797 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
798 if (t != type) {
799 get_ids(dim, t, 0, size[t], ids + off);
800 off += size[t];
801 } else {
802 get_ids(dim, t, 0, pos, ids + off);
803 off += pos + n;
804 get_ids(dim, t, pos, size[t] - pos, ids + off);
805 off += size[t] - pos;
806 }
807 }
808 free(dim->ids);
809 dim->ids = ids;
810 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
811 }
812 switch (type) {
813 case isl_dim_param: dim->nparam += n; break;
814 case isl_dim_in: dim->n_in += n; break;
815 case isl_dim_out: dim->n_out += n; break;
816 default: ;
817 }
818 dim = isl_space_reset(dim, type);
819
820 return dim;
821 error:
822 isl_space_free(dim);
823 return NULL;
824 }
825
826 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
827 enum isl_dim_type dst_type, unsigned dst_pos,
828 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
829 {
830 int i;
831
832 if (!dim)
833 return NULL;
834 if (n == 0)
835 return dim;
836
837 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
838 goto error);
839
840 if (dst_type == src_type && dst_pos == src_pos)
841 return dim;
842
843 isl_assert(dim->ctx, dst_type != src_type, goto error);
844
845 dim = isl_space_reset(dim, src_type);
846 dim = isl_space_reset(dim, dst_type);
847
848 dim = isl_space_cow(dim);
849 if (!dim)
850 return NULL;
851
852 if (dim->ids) {
853 isl_id **ids;
854 enum isl_dim_type t;
855 int off;
856 int s[3];
857 int *size = s - isl_dim_param;
858 ids = isl_calloc_array(dim->ctx, isl_id *,
859 dim->nparam + dim->n_in + dim->n_out);
860 if (!ids)
861 goto error;
862 off = 0;
863 size[isl_dim_param] = dim->nparam;
864 size[isl_dim_in] = dim->n_in;
865 size[isl_dim_out] = dim->n_out;
866 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
867 if (t == dst_type) {
868 get_ids(dim, t, 0, dst_pos, ids + off);
869 off += dst_pos;
870 get_ids(dim, src_type, src_pos, n, ids + off);
871 off += n;
872 get_ids(dim, t, dst_pos, size[t] - dst_pos,
873 ids + off);
874 off += size[t] - dst_pos;
875 } else if (t == src_type) {
876 get_ids(dim, t, 0, src_pos, ids + off);
877 off += src_pos;
878 get_ids(dim, t, src_pos + n,
879 size[t] - src_pos - n, ids + off);
880 off += size[t] - src_pos - n;
881 } else {
882 get_ids(dim, t, 0, size[t], ids + off);
883 off += size[t];
884 }
885 }
886 free(dim->ids);
887 dim->ids = ids;
888 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
889 }
890
891 switch (dst_type) {
892 case isl_dim_param: dim->nparam += n; break;
893 case isl_dim_in: dim->n_in += n; break;
894 case isl_dim_out: dim->n_out += n; break;
895 default: ;
896 }
897
898 switch (src_type) {
899 case isl_dim_param: dim->nparam -= n; break;
900 case isl_dim_in: dim->n_in -= n; break;
901 case isl_dim_out: dim->n_out -= n; break;
902 default: ;
903 }
904
905 if (dst_type != isl_dim_param && src_type != isl_dim_param)
906 return dim;
907
908 for (i = 0; i < 2; ++i) {
909 if (!dim->nested[i])
910 continue;
911 dim->nested[i] = isl_space_replace(dim->nested[i],
912 isl_dim_param, dim);
913 if (!dim->nested[i])
914 goto error;
915 }
916
917 return dim;
918 error:
919 isl_space_free(dim);
920 return NULL;
921 }
922
923 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
924 __isl_take isl_space *right)
925 {
926 isl_space *dim;
927
928 if (!left || !right)
929 goto error;
930
931 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
932 goto error);
933 isl_assert(left->ctx,
934 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
935 goto error);
936
937 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
938 if (!dim)
939 goto error;
940
941 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
942 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
943 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
944
945 if (dim && left->tuple_id[0] &&
946 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
947 goto error;
948 if (dim && right->tuple_id[1] &&
949 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
950 goto error;
951 if (dim && left->nested[0] &&
952 !(dim->nested[0] = isl_space_copy(left->nested[0])))
953 goto error;
954 if (dim && right->nested[1] &&
955 !(dim->nested[1] = isl_space_copy(right->nested[1])))
956 goto error;
957
958 isl_space_free(left);
959 isl_space_free(right);
960
961 return dim;
962 error:
963 isl_space_free(left);
964 isl_space_free(right);
965 return NULL;
966 }
967
968 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
969 __isl_take isl_space *right)
970 {
971 isl_space *dom1, *dom2, *nest1, *nest2;
972
973 if (!left || !right)
974 goto error;
975
976 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
977 goto error);
978
979 dom1 = isl_space_domain(isl_space_copy(left));
980 dom2 = isl_space_domain(isl_space_copy(right));
981 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
982
983 dom1 = isl_space_range(left);
984 dom2 = isl_space_range(right);
985 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
986
987 return isl_space_join(isl_space_reverse(nest1), nest2);
988 error:
989 isl_space_free(left);
990 isl_space_free(right);
991 return NULL;
992 }
993
994 /* Given two spaces { A -> C } and { B -> C }, construct the space
995 * { [A -> B] -> C }
996 */
997 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
998 __isl_take isl_space *right)
999 {
1000 isl_space *ran, *dom1, *dom2, *nest;
1001
1002 if (!left || !right)
1003 goto error;
1004
1005 if (!match(left, isl_dim_param, right, isl_dim_param))
1006 isl_die(left->ctx, isl_error_invalid,
1007 "parameters need to match", goto error);
1008 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1009 isl_die(left->ctx, isl_error_invalid,
1010 "ranges need to match", goto error);
1011
1012 ran = isl_space_range(isl_space_copy(left));
1013
1014 dom1 = isl_space_domain(left);
1015 dom2 = isl_space_domain(right);
1016 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1017
1018 return isl_space_join(isl_space_reverse(nest), ran);
1019 error:
1020 isl_space_free(left);
1021 isl_space_free(right);
1022 return NULL;
1023 }
1024
1025 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1026 __isl_take isl_space *right)
1027 {
1028 isl_space *dom, *ran1, *ran2, *nest;
1029
1030 if (!left || !right)
1031 goto error;
1032
1033 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1034 goto error);
1035 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1036 isl_die(left->ctx, isl_error_invalid,
1037 "domains need to match", goto error);
1038
1039 dom = isl_space_domain(isl_space_copy(left));
1040
1041 ran1 = isl_space_range(left);
1042 ran2 = isl_space_range(right);
1043 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1044
1045 return isl_space_join(isl_space_reverse(dom), nest);
1046 error:
1047 isl_space_free(left);
1048 isl_space_free(right);
1049 return NULL;
1050 }
1051
1052 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1053 {
1054 isl_ctx *ctx;
1055 isl_id **ids = NULL;
1056
1057 if (!dim)
1058 return NULL;
1059 ctx = isl_space_get_ctx(dim);
1060 if (!isl_space_is_set(dim))
1061 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1062 dim = isl_space_cow(dim);
1063 if (!dim)
1064 return NULL;
1065 if (dim->ids) {
1066 ids = isl_calloc_array(dim->ctx, isl_id *,
1067 dim->nparam + dim->n_out + dim->n_out);
1068 if (!ids)
1069 goto error;
1070 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1071 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1072 }
1073 dim->n_in = dim->n_out;
1074 if (ids) {
1075 free(dim->ids);
1076 dim->ids = ids;
1077 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1078 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1079 }
1080 isl_id_free(dim->tuple_id[0]);
1081 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1082 isl_space_free(dim->nested[0]);
1083 dim->nested[0] = isl_space_copy(dim->nested[1]);
1084 return dim;
1085 error:
1086 isl_space_free(dim);
1087 return NULL;
1088 }
1089
1090 __isl_give isl_space *isl_space_map_from_domain_and_range(
1091 __isl_take isl_space *domain, __isl_take isl_space *range)
1092 {
1093 if (!domain || !range)
1094 goto error;
1095 if (!isl_space_is_set(domain))
1096 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1097 "domain is not a set space", goto error);
1098 if (!isl_space_is_set(range))
1099 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1100 "range is not a set space", goto error);
1101 return isl_space_join(isl_space_reverse(domain), range);
1102 error:
1103 isl_space_free(domain);
1104 isl_space_free(range);
1105 return NULL;
1106 }
1107
1108 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1109 enum isl_dim_type type,
1110 unsigned first, unsigned n, __isl_take isl_id **ids)
1111 {
1112 int i;
1113
1114 for (i = 0; i < n ; ++i)
1115 dim = set_id(dim, type, first + i, ids[i]);
1116
1117 return dim;
1118 }
1119
1120 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1121 {
1122 unsigned t;
1123 isl_space *nested;
1124 isl_id **ids = NULL;
1125 isl_id *id;
1126
1127 if (!dim)
1128 return NULL;
1129 if (match(dim, isl_dim_in, dim, isl_dim_out))
1130 return dim;
1131
1132 dim = isl_space_cow(dim);
1133 if (!dim)
1134 return NULL;
1135
1136 id = dim->tuple_id[0];
1137 dim->tuple_id[0] = dim->tuple_id[1];
1138 dim->tuple_id[1] = id;
1139
1140 nested = dim->nested[0];
1141 dim->nested[0] = dim->nested[1];
1142 dim->nested[1] = nested;
1143
1144 if (dim->ids) {
1145 ids = isl_alloc_array(dim->ctx, isl_id *,
1146 dim->n_in + dim->n_out);
1147 if (!ids)
1148 goto error;
1149 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1150 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1151 }
1152
1153 t = dim->n_in;
1154 dim->n_in = dim->n_out;
1155 dim->n_out = t;
1156
1157 if (dim->ids) {
1158 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1159 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1160 free(ids);
1161 }
1162
1163 return dim;
1164 error:
1165 free(ids);
1166 isl_space_free(dim);
1167 return NULL;
1168 }
1169
1170 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1171 enum isl_dim_type type, unsigned first, unsigned num)
1172 {
1173 int i;
1174
1175 if (!dim)
1176 return NULL;
1177
1178 if (num == 0)
1179 return isl_space_reset(dim, type);
1180
1181 if (!valid_dim_type(type))
1182 isl_die(dim->ctx, isl_error_invalid,
1183 "cannot drop dimensions of specified type", goto error);
1184
1185 isl_assert(dim->ctx, first + num <= n(dim, type), goto error);
1186 dim = isl_space_cow(dim);
1187 if (!dim)
1188 goto error;
1189 if (dim->ids) {
1190 dim = extend_ids(dim);
1191 if (!dim)
1192 goto error;
1193 for (i = 0; i < num; ++i)
1194 isl_id_free(get_id(dim, type, first + i));
1195 for (i = first+num; i < n(dim, type); ++i)
1196 set_id(dim, type, i - num, get_id(dim, type, i));
1197 switch (type) {
1198 case isl_dim_param:
1199 get_ids(dim, isl_dim_in, 0, dim->n_in,
1200 dim->ids + offset(dim, isl_dim_in) - num);
1201 case isl_dim_in:
1202 get_ids(dim, isl_dim_out, 0, dim->n_out,
1203 dim->ids + offset(dim, isl_dim_out) - num);
1204 default:
1205 ;
1206 }
1207 dim->n_id -= num;
1208 }
1209 switch (type) {
1210 case isl_dim_param: dim->nparam -= num; break;
1211 case isl_dim_in: dim->n_in -= num; break;
1212 case isl_dim_out: dim->n_out -= num; break;
1213 default: ;
1214 }
1215 dim = isl_space_reset(dim, type);
1216 if (type == isl_dim_param) {
1217 if (dim && dim->nested[0] &&
1218 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1219 isl_dim_param, first, num)))
1220 goto error;
1221 if (dim && dim->nested[1] &&
1222 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1223 isl_dim_param, first, num)))
1224 goto error;
1225 }
1226 return dim;
1227 error:
1228 isl_space_free(dim);
1229 return NULL;
1230 }
1231
1232 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1233 unsigned first, unsigned n)
1234 {
1235 if (!dim)
1236 return NULL;
1237 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1238 }
1239
1240 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1241 unsigned first, unsigned n)
1242 {
1243 if (!dim)
1244 return NULL;
1245 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1246 }
1247
1248 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1249 {
1250 if (!dim)
1251 return NULL;
1252 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1253 dim = isl_space_reverse(dim);
1254 dim = mark_as_set(dim);
1255 return dim;
1256 }
1257
1258 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1259 {
1260 if (!dim)
1261 return NULL;
1262 if (!isl_space_is_set(dim))
1263 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1264 "not a set space", goto error);
1265 dim = isl_space_reverse(dim);
1266 dim = isl_space_reset(dim, isl_dim_out);
1267 return dim;
1268 error:
1269 isl_space_free(dim);
1270 return NULL;
1271 }
1272
1273 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1274 {
1275 if (!dim)
1276 return NULL;
1277 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1278 dim = mark_as_set(dim);
1279 return dim;
1280 }
1281
1282 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1283 {
1284 if (!dim)
1285 return NULL;
1286 if (!isl_space_is_set(dim))
1287 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1288 "not a set space", goto error);
1289 return isl_space_reset(dim, isl_dim_in);
1290 error:
1291 isl_space_free(dim);
1292 return NULL;
1293 }
1294
1295 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1296 {
1297 if (isl_space_is_params(space))
1298 return space;
1299 space = isl_space_drop_dims(space,
1300 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1301 space = isl_space_drop_dims(space,
1302 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1303 space = mark_as_params(space);
1304 return space;
1305 }
1306
1307 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1308 {
1309 if (!space)
1310 return NULL;
1311 if (!isl_space_is_params(space))
1312 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1313 "not a parameter space", goto error);
1314 return isl_space_reset(space, isl_dim_set);
1315 error:
1316 isl_space_free(space);
1317 return NULL;
1318 }
1319
1320 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1321 {
1322 dim = isl_space_cow(dim);
1323 if (!dim)
1324 return NULL;
1325
1326 dim->n_out += dim->n_in;
1327 dim->n_in = 0;
1328 dim = isl_space_reset(dim, isl_dim_in);
1329 dim = isl_space_reset(dim, isl_dim_out);
1330
1331 return dim;
1332 }
1333
1334 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1335 unsigned n_div)
1336 {
1337 int i;
1338
1339 if (!dim)
1340 return NULL;
1341 if (n_div == 0 &&
1342 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1343 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1344 dim = isl_space_cow(dim);
1345 if (!dim)
1346 return NULL;
1347 dim->n_out += dim->nparam + dim->n_in + n_div;
1348 dim->nparam = 0;
1349 dim->n_in = 0;
1350
1351 for (i = 0; i < dim->n_id; ++i)
1352 isl_id_free(get_id(dim, isl_dim_out, i));
1353 dim->n_id = 0;
1354 dim = isl_space_reset(dim, isl_dim_in);
1355 dim = isl_space_reset(dim, isl_dim_out);
1356
1357 return dim;
1358 }
1359
1360 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1361 {
1362 if (!dim1 || !dim2)
1363 return -1;
1364 if (dim1 == dim2)
1365 return 1;
1366 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1367 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1368 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1369 }
1370
1371 /* Is space1 equal to the domain of space2?
1372 */
1373 int isl_space_is_domain(__isl_keep isl_space *space1,
1374 __isl_keep isl_space *space2)
1375 {
1376 if (!space1 || !space2)
1377 return -1;
1378 if (!isl_space_is_set(space1))
1379 return 0;
1380 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1381 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1382 }
1383
1384 int isl_space_compatible(__isl_keep isl_space *dim1,
1385 __isl_keep isl_space *dim2)
1386 {
1387 return dim1->nparam == dim2->nparam &&
1388 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1389 }
1390
1391 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1392 {
1393 int i;
1394 isl_id *id;
1395
1396 if (!dim)
1397 return hash;
1398
1399 hash = isl_hash_builtin(hash, dim->nparam);
1400 hash = isl_hash_builtin(hash, dim->n_in);
1401 hash = isl_hash_builtin(hash, dim->n_out);
1402
1403 for (i = 0; i < dim->nparam; ++i) {
1404 id = get_id(dim, isl_dim_param, i);
1405 hash = isl_hash_id(hash, id);
1406 }
1407
1408 id = tuple_id(dim, isl_dim_in);
1409 hash = isl_hash_id(hash, id);
1410 id = tuple_id(dim, isl_dim_out);
1411 hash = isl_hash_id(hash, id);
1412
1413 hash = isl_hash_dim(hash, dim->nested[0]);
1414 hash = isl_hash_dim(hash, dim->nested[1]);
1415
1416 return hash;
1417 }
1418
1419 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1420 {
1421 uint32_t hash;
1422
1423 if (!dim)
1424 return 0;
1425
1426 hash = isl_hash_init();
1427 hash = isl_hash_dim(hash, dim);
1428
1429 return hash;
1430 }
1431
1432 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1433 {
1434 if (!dim)
1435 return -1;
1436
1437 if (!isl_space_is_set(dim))
1438 return 0;
1439
1440 return dim->nested[1] != NULL;
1441 }
1442
1443 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1444 {
1445 isl_space *wrap;
1446
1447 if (!dim)
1448 return NULL;
1449
1450 wrap = isl_space_set_alloc(dim->ctx,
1451 dim->nparam, dim->n_in + dim->n_out);
1452
1453 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1454 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1455 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1456
1457 if (!wrap)
1458 goto error;
1459
1460 wrap->nested[1] = dim;
1461
1462 return wrap;
1463 error:
1464 isl_space_free(dim);
1465 return NULL;
1466 }
1467
1468 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1469 {
1470 isl_space *unwrap;
1471
1472 if (!dim)
1473 return NULL;
1474
1475 if (!isl_space_is_wrapping(dim))
1476 isl_die(dim->ctx, isl_error_invalid, "not a wrapping dim",
1477 goto error);
1478
1479 unwrap = isl_space_copy(dim->nested[1]);
1480 isl_space_free(dim);
1481
1482 return unwrap;
1483 error:
1484 isl_space_free(dim);
1485 return NULL;
1486 }
1487
1488 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1489 {
1490 if (type != isl_dim_in && type != isl_dim_out)
1491 return 0;
1492 if (!dim)
1493 return -1;
1494 if (dim->tuple_id[type - isl_dim_in])
1495 return 1;
1496 if (dim->nested[type - isl_dim_in])
1497 return 1;
1498 return 0;
1499 }
1500
1501 int isl_space_may_be_set(__isl_keep isl_space *dim)
1502 {
1503 if (!dim)
1504 return -1;
1505 if (isl_space_is_set(dim))
1506 return 1;
1507 if (isl_space_dim(dim, isl_dim_in) != 0)
1508 return 0;
1509 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1510 return 0;
1511 return 1;
1512 }
1513
1514 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1515 enum isl_dim_type type)
1516 {
1517 if (!isl_space_is_named_or_nested(dim, type))
1518 return dim;
1519
1520 dim = isl_space_cow(dim);
1521 if (!dim)
1522 return NULL;
1523
1524 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1525 dim->tuple_id[type - isl_dim_in] = NULL;
1526 isl_space_free(dim->nested[type - isl_dim_in]);
1527 dim->nested[type - isl_dim_in] = NULL;
1528
1529 return dim;
1530 }
1531
1532 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1533 {
1534 if (!dim)
1535 return NULL;
1536 if (!dim->nested[0] && !dim->nested[1])
1537 return dim;
1538
1539 if (dim->nested[0])
1540 dim = isl_space_reset(dim, isl_dim_in);
1541 if (dim && dim->nested[1])
1542 dim = isl_space_reset(dim, isl_dim_out);
1543
1544 return dim;
1545 }
1546
1547 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1548 {
1549 if (!dim)
1550 return NULL;
1551 if (!dim->nested[0])
1552 return dim;
1553
1554 return isl_space_reset(dim, isl_dim_in);
1555 }
1556
1557 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1558 {
1559 if (!dim)
1560 return NULL;
1561 if (!dim->nested[1])
1562 return dim;
1563
1564 return isl_space_reset(dim, isl_dim_out);
1565 }
1566
1567 /* Replace the dimensions of the given type of dst by those of src.
1568 */
1569 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1570 enum isl_dim_type type, __isl_keep isl_space *src)
1571 {
1572 dst = isl_space_cow(dst);
1573
1574 if (!dst || !src)
1575 goto error;
1576
1577 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1578 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1579 dst = copy_ids(dst, type, 0, src, type);
1580
1581 if (dst && type == isl_dim_param) {
1582 int i;
1583 for (i = 0; i <= 1; ++i) {
1584 if (!dst->nested[i])
1585 continue;
1586 dst->nested[i] = isl_space_replace(dst->nested[i],
1587 type, src);
1588 if (!dst->nested[i])
1589 goto error;
1590 }
1591 }
1592
1593 return dst;
1594 error:
1595 isl_space_free(dst);
1596 return NULL;
1597 }
1598
1599 /* Given a dimension specification "dim" of a set, create a dimension
1600 * specification for the lift of the set. In particular, the result
1601 * is of the form [dim -> local[..]], with n_local variables in the
1602 * range of the wrapped map.
1603 */
1604 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1605 {
1606 isl_space *local_dim;
1607
1608 if (!dim)
1609 return NULL;
1610
1611 local_dim = isl_space_dup(dim);
1612 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
1613 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
1614 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
1615 dim = isl_space_join(isl_space_from_domain(dim),
1616 isl_space_from_range(local_dim));
1617 dim = isl_space_wrap(dim);
1618 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
1619
1620 return dim;
1621 }
1622
1623 int isl_space_can_zip(__isl_keep isl_space *dim)
1624 {
1625 if (!dim)
1626 return -1;
1627
1628 return dim->nested[0] && dim->nested[1];
1629 }
1630
1631 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
1632 {
1633 isl_space *dom, *ran;
1634 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
1635
1636 if (!isl_space_can_zip(dim))
1637 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
1638 goto error);
1639
1640 if (!dim)
1641 return 0;
1642 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
1643 ran = isl_space_unwrap(isl_space_range(dim));
1644 dom_dom = isl_space_domain(isl_space_copy(dom));
1645 dom_ran = isl_space_range(dom);
1646 ran_dom = isl_space_domain(isl_space_copy(ran));
1647 ran_ran = isl_space_range(ran);
1648 dom = isl_space_join(isl_space_from_domain(dom_dom),
1649 isl_space_from_range(ran_dom));
1650 ran = isl_space_join(isl_space_from_domain(dom_ran),
1651 isl_space_from_range(ran_ran));
1652 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
1653 isl_space_from_range(isl_space_wrap(ran)));
1654 error:
1655 isl_space_free(dim);
1656 return NULL;
1657 }
1658
1659 int isl_space_has_named_params(__isl_keep isl_space *dim)
1660 {
1661 int i;
1662 unsigned off;
1663
1664 if (!dim)
1665 return -1;
1666 if (dim->nparam == 0)
1667 return 1;
1668 off = isl_space_offset(dim, isl_dim_param);
1669 if (off + dim->nparam > dim->n_id)
1670 return 0;
1671 for (i = 0; i < dim->nparam; ++i)
1672 if (!dim->ids[off + i])
1673 return 0;
1674 return 1;
1675 }
1676
1677 /* Align the initial parameters of dim1 to match the order in dim2.
1678 */
1679 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
1680 __isl_take isl_space *dim2)
1681 {
1682 isl_reordering *exp;
1683
1684 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
1685 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
1686 "parameter alignment requires named parameters",
1687 goto error);
1688
1689 dim2 = isl_space_params(dim2);
1690 exp = isl_parameter_alignment_reordering(dim1, dim2);
1691 exp = isl_reordering_extend_space(exp, dim1);
1692 isl_space_free(dim2);
1693 if (!exp)
1694 return NULL;
1695 dim1 = isl_space_copy(exp->dim);
1696 isl_reordering_free(exp);
1697 return dim1;
1698 error:
1699 isl_space_free(dim1);
1700 isl_space_free(dim2);
1701 return NULL;
1702 }
1703
1704 /* Given the space of set (domain), construct a space for a map
1705 * with as domain the given space and as range the range of "model".
1706 */
1707 __isl_give isl_space *isl_space_extend_domain_with_range(
1708 __isl_take isl_space *domain, __isl_take isl_space *model)
1709 {
1710 isl_space *space;
1711
1712 space = isl_space_from_domain(domain);
1713 space = isl_space_add_dims(space, isl_dim_out,
1714 isl_space_dim(model, isl_dim_out));
1715 if (isl_space_has_tuple_id(model, isl_dim_out))
1716 space = isl_space_set_tuple_id(space, isl_dim_out,
1717 isl_space_get_tuple_id(model, isl_dim_out));
1718 isl_space_free(model);
1719 return space;
1720 }
Integer set library