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isl_map_union_disjoint: check spaces before handling special cases
[isl.git] / isl_space.c
blob2e4be0c140275adf627c8c9d9e404058b8702f05
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 * Copyright 2013-2014 Ecole Normale Superieure
5 *
6 * Use of this software is governed by the MIT license
7 *
8 * Written by Sven Verdoolaege, K.U.Leuven, Departement
9 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
10 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
11 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
12 * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
13 */
14
15 #include <stdlib.h>
16 #include <string.h>
17 #include <isl_space_private.h>
18 #include <isl_id_private.h>
19 #include <isl_reordering.h>
20
21 isl_ctx *isl_space_get_ctx(__isl_keep isl_space *dim)
22 {
23 return dim ? dim->ctx : NULL;
24 }
25
26 __isl_give isl_space *isl_space_alloc(isl_ctx *ctx,
27 unsigned nparam, unsigned n_in, unsigned n_out)
28 {
29 isl_space *dim;
30
31 dim = isl_alloc_type(ctx, struct isl_space);
32 if (!dim)
33 return NULL;
34
35 dim->ctx = ctx;
36 isl_ctx_ref(ctx);
37 dim->ref = 1;
38 dim->nparam = nparam;
39 dim->n_in = n_in;
40 dim->n_out = n_out;
41
42 dim->tuple_id[0] = NULL;
43 dim->tuple_id[1] = NULL;
44
45 dim->nested[0] = NULL;
46 dim->nested[1] = NULL;
47
48 dim->n_id = 0;
49 dim->ids = NULL;
50
51 return dim;
52 }
53
54 /* Mark the space as being that of a set, by setting the domain tuple
55 * to isl_id_none.
56 */
57 static __isl_give isl_space *mark_as_set(__isl_take isl_space *space)
58 {
59 space = isl_space_cow(space);
60 if (!space)
61 return NULL;
62 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
63 return space;
64 }
65
66 /* Is the space that of a set?
67 */
68 int isl_space_is_set(__isl_keep isl_space *space)
69 {
70 if (!space)
71 return -1;
72 if (space->n_in != 0 || space->nested[0])
73 return 0;
74 if (space->tuple_id[0] != &isl_id_none)
75 return 0;
76 return 1;
77 }
78
79 /* Is the given space that of a map?
80 */
81 int isl_space_is_map(__isl_keep isl_space *space)
82 {
83 if (!space)
84 return -1;
85 return space->tuple_id[0] != &isl_id_none &&
86 space->tuple_id[1] != &isl_id_none;
87 }
88
89 __isl_give isl_space *isl_space_set_alloc(isl_ctx *ctx,
90 unsigned nparam, unsigned dim)
91 {
92 isl_space *space;
93 space = isl_space_alloc(ctx, nparam, 0, dim);
94 space = mark_as_set(space);
95 return space;
96 }
97
98 /* Mark the space as being that of a parameter domain, by setting
99 * both tuples to isl_id_none.
100 */
101 static __isl_give isl_space *mark_as_params(isl_space *space)
102 {
103 if (!space)
104 return NULL;
105 space = isl_space_set_tuple_id(space, isl_dim_in, &isl_id_none);
106 space = isl_space_set_tuple_id(space, isl_dim_out, &isl_id_none);
107 return space;
108 }
109
110 /* Is the space that of a parameter domain?
111 */
112 int isl_space_is_params(__isl_keep isl_space *space)
113 {
114 if (!space)
115 return -1;
116 if (space->n_in != 0 || space->nested[0] ||
117 space->n_out != 0 || space->nested[1])
118 return 0;
119 if (space->tuple_id[0] != &isl_id_none)
120 return 0;
121 if (space->tuple_id[1] != &isl_id_none)
122 return 0;
123 return 1;
124 }
125
126 /* Create a space for a parameter domain.
127 */
128 __isl_give isl_space *isl_space_params_alloc(isl_ctx *ctx, unsigned nparam)
129 {
130 isl_space *space;
131 space = isl_space_alloc(ctx, nparam, 0, 0);
132 space = mark_as_params(space);
133 return space;
134 }
135
136 static unsigned global_pos(__isl_keep isl_space *dim,
137 enum isl_dim_type type, unsigned pos)
138 {
139 struct isl_ctx *ctx = dim->ctx;
140
141 switch (type) {
142 case isl_dim_param:
143 isl_assert(ctx, pos < dim->nparam,
144 return isl_space_dim(dim, isl_dim_all));
145 return pos;
146 case isl_dim_in:
147 isl_assert(ctx, pos < dim->n_in,
148 return isl_space_dim(dim, isl_dim_all));
149 return pos + dim->nparam;
150 case isl_dim_out:
151 isl_assert(ctx, pos < dim->n_out,
152 return isl_space_dim(dim, isl_dim_all));
153 return pos + dim->nparam + dim->n_in;
154 default:
155 isl_assert(ctx, 0, return isl_space_dim(dim, isl_dim_all));
156 }
157 return isl_space_dim(dim, isl_dim_all);
158 }
159
160 /* Extend length of ids array to the total number of dimensions.
161 */
162 static __isl_give isl_space *extend_ids(__isl_take isl_space *dim)
163 {
164 isl_id **ids;
165 int i;
166
167 if (isl_space_dim(dim, isl_dim_all) <= dim->n_id)
168 return dim;
169
170 if (!dim->ids) {
171 dim->ids = isl_calloc_array(dim->ctx,
172 isl_id *, isl_space_dim(dim, isl_dim_all));
173 if (!dim->ids)
174 goto error;
175 } else {
176 ids = isl_realloc_array(dim->ctx, dim->ids,
177 isl_id *, isl_space_dim(dim, isl_dim_all));
178 if (!ids)
179 goto error;
180 dim->ids = ids;
181 for (i = dim->n_id; i < isl_space_dim(dim, isl_dim_all); ++i)
182 dim->ids[i] = NULL;
183 }
184
185 dim->n_id = isl_space_dim(dim, isl_dim_all);
186
187 return dim;
188 error:
189 isl_space_free(dim);
190 return NULL;
191 }
192
193 static __isl_give isl_space *set_id(__isl_take isl_space *dim,
194 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
195 {
196 dim = isl_space_cow(dim);
197
198 if (!dim)
199 goto error;
200
201 pos = global_pos(dim, type, pos);
202 if (pos == isl_space_dim(dim, isl_dim_all))
203 goto error;
204
205 if (pos >= dim->n_id) {
206 if (!id)
207 return dim;
208 dim = extend_ids(dim);
209 if (!dim)
210 goto error;
211 }
212
213 dim->ids[pos] = id;
214
215 return dim;
216 error:
217 isl_id_free(id);
218 isl_space_free(dim);
219 return NULL;
220 }
221
222 static __isl_keep isl_id *get_id(__isl_keep isl_space *dim,
223 enum isl_dim_type type, unsigned pos)
224 {
225 if (!dim)
226 return NULL;
227
228 pos = global_pos(dim, type, pos);
229 if (pos == isl_space_dim(dim, isl_dim_all))
230 return NULL;
231 if (pos >= dim->n_id)
232 return NULL;
233 return dim->ids[pos];
234 }
235
236 static unsigned offset(__isl_keep isl_space *dim, enum isl_dim_type type)
237 {
238 switch (type) {
239 case isl_dim_param: return 0;
240 case isl_dim_in: return dim->nparam;
241 case isl_dim_out: return dim->nparam + dim->n_in;
242 default: return 0;
243 }
244 }
245
246 static unsigned n(__isl_keep isl_space *dim, enum isl_dim_type type)
247 {
248 switch (type) {
249 case isl_dim_param: return dim->nparam;
250 case isl_dim_in: return dim->n_in;
251 case isl_dim_out: return dim->n_out;
252 case isl_dim_all: return dim->nparam + dim->n_in + dim->n_out;
253 default: return 0;
254 }
255 }
256
257 unsigned isl_space_dim(__isl_keep isl_space *dim, enum isl_dim_type type)
258 {
259 if (!dim)
260 return 0;
261 return n(dim, type);
262 }
263
264 unsigned isl_space_offset(__isl_keep isl_space *dim, enum isl_dim_type type)
265 {
266 if (!dim)
267 return 0;
268 return offset(dim, type);
269 }
270
271 static __isl_give isl_space *copy_ids(__isl_take isl_space *dst,
272 enum isl_dim_type dst_type, unsigned offset, __isl_keep isl_space *src,
273 enum isl_dim_type src_type)
274 {
275 int i;
276 isl_id *id;
277
278 if (!dst)
279 return NULL;
280
281 for (i = 0; i < n(src, src_type); ++i) {
282 id = get_id(src, src_type, i);
283 if (!id)
284 continue;
285 dst = set_id(dst, dst_type, offset + i, isl_id_copy(id));
286 if (!dst)
287 return NULL;
288 }
289 return dst;
290 }
291
292 __isl_take isl_space *isl_space_dup(__isl_keep isl_space *dim)
293 {
294 isl_space *dup;
295 if (!dim)
296 return NULL;
297 dup = isl_space_alloc(dim->ctx, dim->nparam, dim->n_in, dim->n_out);
298 if (!dup)
299 return NULL;
300 if (dim->tuple_id[0] &&
301 !(dup->tuple_id[0] = isl_id_copy(dim->tuple_id[0])))
302 goto error;
303 if (dim->tuple_id[1] &&
304 !(dup->tuple_id[1] = isl_id_copy(dim->tuple_id[1])))
305 goto error;
306 if (dim->nested[0] && !(dup->nested[0] = isl_space_copy(dim->nested[0])))
307 goto error;
308 if (dim->nested[1] && !(dup->nested[1] = isl_space_copy(dim->nested[1])))
309 goto error;
310 if (!dim->ids)
311 return dup;
312 dup = copy_ids(dup, isl_dim_param, 0, dim, isl_dim_param);
313 dup = copy_ids(dup, isl_dim_in, 0, dim, isl_dim_in);
314 dup = copy_ids(dup, isl_dim_out, 0, dim, isl_dim_out);
315 return dup;
316 error:
317 isl_space_free(dup);
318 return NULL;
319 }
320
321 __isl_give isl_space *isl_space_cow(__isl_take isl_space *dim)
322 {
323 if (!dim)
324 return NULL;
325
326 if (dim->ref == 1)
327 return dim;
328 dim->ref--;
329 return isl_space_dup(dim);
330 }
331
332 __isl_give isl_space *isl_space_copy(__isl_keep isl_space *dim)
333 {
334 if (!dim)
335 return NULL;
336
337 dim->ref++;
338 return dim;
339 }
340
341 __isl_null isl_space *isl_space_free(__isl_take isl_space *space)
342 {
343 int i;
344
345 if (!space)
346 return NULL;
347
348 if (--space->ref > 0)
349 return NULL;
350
351 isl_id_free(space->tuple_id[0]);
352 isl_id_free(space->tuple_id[1]);
353
354 isl_space_free(space->nested[0]);
355 isl_space_free(space->nested[1]);
356
357 for (i = 0; i < space->n_id; ++i)
358 isl_id_free(space->ids[i]);
359 free(space->ids);
360 isl_ctx_deref(space->ctx);
361
362 free(space);
363
364 return NULL;
365 }
366
367 /* Check if "s" is a valid dimension or tuple name.
368 * We currently only forbid names that look like a number.
369 *
370 * s is assumed to be non-NULL.
371 */
372 static int name_ok(isl_ctx *ctx, const char *s)
373 {
374 char *p;
375 long dummy;
376
377 dummy = strtol(s, &p, 0);
378 if (p != s)
379 isl_die(ctx, isl_error_invalid, "name looks like a number",
380 return 0);
381
382 return 1;
383 }
384
385 /* Is it possible for the given dimension type to have a tuple id?
386 */
387 static int space_can_have_id(__isl_keep isl_space *space,
388 enum isl_dim_type type)
389 {
390 if (!space)
391 return 0;
392 if (isl_space_is_params(space))
393 isl_die(space->ctx, isl_error_invalid,
394 "parameter spaces don't have tuple ids", return 0);
395 if (isl_space_is_set(space) && type != isl_dim_set)
396 isl_die(space->ctx, isl_error_invalid,
397 "set spaces can only have a set id", return 0);
398 if (type != isl_dim_in && type != isl_dim_out)
399 isl_die(space->ctx, isl_error_invalid,
400 "only input, output and set tuples can have ids",
401 return 0);
402
403 return 1;
404 }
405
406 /* Does the tuple have an id?
407 */
408 int isl_space_has_tuple_id(__isl_keep isl_space *dim, enum isl_dim_type type)
409 {
410 if (!space_can_have_id(dim, type))
411 return -1;
412 return dim->tuple_id[type - isl_dim_in] != NULL;
413 }
414
415 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
416 enum isl_dim_type type)
417 {
418 int has_id;
419
420 if (!dim)
421 return NULL;
422 has_id = isl_space_has_tuple_id(dim, type);
423 if (has_id < 0)
424 return NULL;
425 if (!has_id)
426 isl_die(dim->ctx, isl_error_invalid,
427 "tuple has no id", return NULL);
428 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
429 }
430
431 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
432 enum isl_dim_type type, __isl_take isl_id *id)
433 {
434 dim = isl_space_cow(dim);
435 if (!dim || !id)
436 goto error;
437 if (type != isl_dim_in && type != isl_dim_out)
438 isl_die(dim->ctx, isl_error_invalid,
439 "only input, output and set tuples can have names",
440 goto error);
441
442 isl_id_free(dim->tuple_id[type - isl_dim_in]);
443 dim->tuple_id[type - isl_dim_in] = id;
444
445 return dim;
446 error:
447 isl_id_free(id);
448 isl_space_free(dim);
449 return NULL;
450 }
451
452 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
453 enum isl_dim_type type)
454 {
455 dim = isl_space_cow(dim);
456 if (!dim)
457 return NULL;
458 if (type != isl_dim_in && type != isl_dim_out)
459 isl_die(dim->ctx, isl_error_invalid,
460 "only input, output and set tuples can have names",
461 goto error);
462
463 isl_id_free(dim->tuple_id[type - isl_dim_in]);
464 dim->tuple_id[type - isl_dim_in] = NULL;
465
466 return dim;
467 error:
468 isl_space_free(dim);
469 return NULL;
470 }
471
472 /* Set the id of the given dimension of "space" to "id".
473 * If the dimension already has an id, then it is replaced.
474 * If the dimension is a parameter, then we need to change it
475 * in the nested spaces (if any) as well.
476 */
477 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
478 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
479 {
480 space = isl_space_cow(space);
481 if (!space || !id)
482 goto error;
483
484 if (type == isl_dim_param) {
485 int i;
486
487 for (i = 0; i < 2; ++i) {
488 if (!space->nested[i])
489 continue;
490 space->nested[i] =
491 isl_space_set_dim_id(space->nested[i],
492 type, pos, isl_id_copy(id));
493 if (!space->nested[i])
494 goto error;
495 }
496 }
497
498 isl_id_free(get_id(space, type, pos));
499 return set_id(space, type, pos, id);
500 error:
501 isl_id_free(id);
502 isl_space_free(space);
503 return NULL;
504 }
505
506 /* Reset the id of the given dimension of "space".
507 * If the dimension already has an id, then it is removed.
508 * If the dimension is a parameter, then we need to reset it
509 * in the nested spaces (if any) as well.
510 */
511 __isl_give isl_space *isl_space_reset_dim_id(__isl_take isl_space *space,
512 enum isl_dim_type type, unsigned pos)
513 {
514 space = isl_space_cow(space);
515 if (!space)
516 goto error;
517
518 if (type == isl_dim_param) {
519 int i;
520
521 for (i = 0; i < 2; ++i) {
522 if (!space->nested[i])
523 continue;
524 space->nested[i] =
525 isl_space_reset_dim_id(space->nested[i],
526 type, pos);
527 if (!space->nested[i])
528 goto error;
529 }
530 }
531
532 isl_id_free(get_id(space, type, pos));
533 return set_id(space, type, pos, NULL);
534 error:
535 isl_space_free(space);
536 return NULL;
537 }
538
539 int isl_space_has_dim_id(__isl_keep isl_space *dim,
540 enum isl_dim_type type, unsigned pos)
541 {
542 if (!dim)
543 return -1;
544 return get_id(dim, type, pos) != NULL;
545 }
546
547 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
548 enum isl_dim_type type, unsigned pos)
549 {
550 if (!dim)
551 return NULL;
552 if (!get_id(dim, type, pos))
553 isl_die(dim->ctx, isl_error_invalid,
554 "dim has no id", return NULL);
555 return isl_id_copy(get_id(dim, type, pos));
556 }
557
558 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
559 enum isl_dim_type type, const char *s)
560 {
561 isl_id *id;
562
563 if (!dim)
564 return NULL;
565
566 if (!s)
567 return isl_space_reset_tuple_id(dim, type);
568
569 if (!name_ok(dim->ctx, s))
570 goto error;
571
572 id = isl_id_alloc(dim->ctx, s, NULL);
573 return isl_space_set_tuple_id(dim, type, id);
574 error:
575 isl_space_free(dim);
576 return NULL;
577 }
578
579 /* Does the tuple have a name?
580 */
581 int isl_space_has_tuple_name(__isl_keep isl_space *space,
582 enum isl_dim_type type)
583 {
584 isl_id *id;
585
586 if (!space_can_have_id(space, type))
587 return -1;
588 id = space->tuple_id[type - isl_dim_in];
589 return id && id->name;
590 }
591
592 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
593 enum isl_dim_type type)
594 {
595 isl_id *id;
596 if (!dim)
597 return NULL;
598 if (type != isl_dim_in && type != isl_dim_out)
599 return NULL;
600 id = dim->tuple_id[type - isl_dim_in];
601 return id ? id->name : NULL;
602 }
603
604 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
605 enum isl_dim_type type, unsigned pos,
606 const char *s)
607 {
608 isl_id *id;
609
610 if (!dim)
611 return NULL;
612 if (!s)
613 return isl_space_reset_dim_id(dim, type, pos);
614 if (!name_ok(dim->ctx, s))
615 goto error;
616 id = isl_id_alloc(dim->ctx, s, NULL);
617 return isl_space_set_dim_id(dim, type, pos, id);
618 error:
619 isl_space_free(dim);
620 return NULL;
621 }
622
623 /* Does the given dimension have a name?
624 */
625 int isl_space_has_dim_name(__isl_keep isl_space *space,
626 enum isl_dim_type type, unsigned pos)
627 {
628 isl_id *id;
629
630 if (!space)
631 return -1;
632 id = get_id(space, type, pos);
633 return id && id->name;
634 }
635
636 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
637 enum isl_dim_type type, unsigned pos)
638 {
639 isl_id *id = get_id(dim, type, pos);
640 return id ? id->name : NULL;
641 }
642
643 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
644 __isl_keep isl_id *id)
645 {
646 int i;
647 int offset;
648 int n;
649
650 if (!dim || !id)
651 return -1;
652
653 offset = isl_space_offset(dim, type);
654 n = isl_space_dim(dim, type);
655 for (i = 0; i < n && offset + i < dim->n_id; ++i)
656 if (dim->ids[offset + i] == id)
657 return i;
658
659 return -1;
660 }
661
662 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
663 enum isl_dim_type type, const char *name)
664 {
665 int i;
666 int offset;
667 int n;
668
669 if (!space || !name)
670 return -1;
671
672 offset = isl_space_offset(space, type);
673 n = isl_space_dim(space, type);
674 for (i = 0; i < n && offset + i < space->n_id; ++i)
675 if (space->ids[offset + i]->name &&
676 !strcmp(space->ids[offset + i]->name, name))
677 return i;
678
679 return -1;
680 }
681
682 /* Reset the user pointer on all identifiers of parameters and tuples
683 * of "space".
684 */
685 __isl_give isl_space *isl_space_reset_user(__isl_take isl_space *space)
686 {
687 int i;
688 isl_ctx *ctx;
689 isl_id *id;
690 const char *name;
691
692 if (!space)
693 return NULL;
694
695 ctx = isl_space_get_ctx(space);
696
697 for (i = 0; i < space->nparam && i < space->n_id; ++i) {
698 if (!isl_id_get_user(space->ids[i]))
699 continue;
700 space = isl_space_cow(space);
701 if (!space)
702 return NULL;
703 name = isl_id_get_name(space->ids[i]);
704 id = isl_id_alloc(ctx, name, NULL);
705 isl_id_free(space->ids[i]);
706 space->ids[i] = id;
707 if (!id)
708 return isl_space_free(space);
709 }
710
711 for (i = 0; i < 2; ++i) {
712 if (!space->tuple_id[i])
713 continue;
714 if (!isl_id_get_user(space->tuple_id[i]))
715 continue;
716 space = isl_space_cow(space);
717 if (!space)
718 return NULL;
719 name = isl_id_get_name(space->tuple_id[i]);
720 id = isl_id_alloc(ctx, name, NULL);
721 isl_id_free(space->tuple_id[i]);
722 space->tuple_id[i] = id;
723 if (!id)
724 return isl_space_free(space);
725 }
726
727 for (i = 0; i < 2; ++i) {
728 if (!space->nested[i])
729 continue;
730 space = isl_space_cow(space);
731 if (!space)
732 return NULL;
733 space->nested[i] = isl_space_reset_user(space->nested[i]);
734 if (!space->nested[i])
735 return isl_space_free(space);
736 }
737
738 return space;
739 }
740
741 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
742 enum isl_dim_type type)
743 {
744 if (!dim)
745 return NULL;
746 if (type == isl_dim_in)
747 return dim->tuple_id[0];
748 if (type == isl_dim_out)
749 return dim->tuple_id[1];
750 return NULL;
751 }
752
753 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
754 enum isl_dim_type type)
755 {
756 if (!dim)
757 return NULL;
758 if (type == isl_dim_in)
759 return dim->nested[0];
760 if (type == isl_dim_out)
761 return dim->nested[1];
762 return NULL;
763 }
764
765 int isl_space_tuple_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
766 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
767 {
768 isl_id *id1, *id2;
769 isl_space *nested1, *nested2;
770
771 if (!dim1 || !dim2)
772 return -1;
773
774 if (dim1 == dim2 && dim1_type == dim2_type)
775 return 1;
776
777 if (n(dim1, dim1_type) != n(dim2, dim2_type))
778 return 0;
779 id1 = tuple_id(dim1, dim1_type);
780 id2 = tuple_id(dim2, dim2_type);
781 if (!id1 ^ !id2)
782 return 0;
783 if (id1 && id1 != id2)
784 return 0;
785 nested1 = nested(dim1, dim1_type);
786 nested2 = nested(dim2, dim2_type);
787 if (!nested1 ^ !nested2)
788 return 0;
789 if (nested1 && !isl_space_is_equal(nested1, nested2))
790 return 0;
791 return 1;
792 }
793
794 static int match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
795 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
796 {
797 int i;
798
799 if (dim1 == dim2 && dim1_type == dim2_type)
800 return 1;
801
802 if (!isl_space_tuple_match(dim1, dim1_type, dim2, dim2_type))
803 return 0;
804
805 if (!dim1->ids && !dim2->ids)
806 return 1;
807
808 for (i = 0; i < n(dim1, dim1_type); ++i) {
809 if (get_id(dim1, dim1_type, i) != get_id(dim2, dim2_type, i))
810 return 0;
811 }
812 return 1;
813 }
814
815 int isl_space_match(__isl_keep isl_space *dim1, enum isl_dim_type dim1_type,
816 __isl_keep isl_space *dim2, enum isl_dim_type dim2_type)
817 {
818 if (!dim1 || !dim2)
819 return -1;
820
821 return match(dim1, dim1_type, dim2, dim2_type);
822 }
823
824 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
825 unsigned first, unsigned n, __isl_keep isl_id **ids)
826 {
827 int i;
828
829 for (i = 0; i < n ; ++i)
830 ids[i] = get_id(dim, type, first + i);
831 }
832
833 __isl_give isl_space *isl_space_extend(__isl_take isl_space *dim,
834 unsigned nparam, unsigned n_in, unsigned n_out)
835 {
836 isl_id **ids = NULL;
837
838 if (!dim)
839 return NULL;
840 if (dim->nparam == nparam && dim->n_in == n_in && dim->n_out == n_out)
841 return dim;
842
843 isl_assert(dim->ctx, dim->nparam <= nparam, goto error);
844 isl_assert(dim->ctx, dim->n_in <= n_in, goto error);
845 isl_assert(dim->ctx, dim->n_out <= n_out, goto error);
846
847 dim = isl_space_cow(dim);
848 if (!dim)
849 goto error;
850
851 if (dim->ids) {
852 ids = isl_calloc_array(dim->ctx, isl_id *,
853 nparam + n_in + n_out);
854 if (!ids)
855 goto error;
856 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
857 get_ids(dim, isl_dim_in, 0, dim->n_in, ids + nparam);
858 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + nparam + n_in);
859 free(dim->ids);
860 dim->ids = ids;
861 dim->n_id = nparam + n_in + n_out;
862 }
863 dim->nparam = nparam;
864 dim->n_in = n_in;
865 dim->n_out = n_out;
866
867 return dim;
868 error:
869 free(ids);
870 isl_space_free(dim);
871 return NULL;
872 }
873
874 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *dim,
875 enum isl_dim_type type, unsigned n)
876 {
877 if (!dim)
878 return NULL;
879 dim = isl_space_reset(dim, type);
880 switch (type) {
881 case isl_dim_param:
882 dim = isl_space_extend(dim,
883 dim->nparam + n, dim->n_in, dim->n_out);
884 if (dim && dim->nested[0] &&
885 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
886 isl_dim_param, n)))
887 goto error;
888 if (dim && dim->nested[1] &&
889 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
890 isl_dim_param, n)))
891 goto error;
892 return dim;
893 case isl_dim_in:
894 return isl_space_extend(dim,
895 dim->nparam, dim->n_in + n, dim->n_out);
896 case isl_dim_out:
897 return isl_space_extend(dim,
898 dim->nparam, dim->n_in, dim->n_out + n);
899 default:
900 isl_die(dim->ctx, isl_error_invalid,
901 "cannot add dimensions of specified type", goto error);
902 }
903 error:
904 isl_space_free(dim);
905 return NULL;
906 }
907
908 static int valid_dim_type(enum isl_dim_type type)
909 {
910 switch (type) {
911 case isl_dim_param:
912 case isl_dim_in:
913 case isl_dim_out:
914 return 1;
915 default:
916 return 0;
917 }
918 }
919
920 /* Insert "n" dimensions of type "type" at position "pos".
921 * If we are inserting parameters, then they are also inserted in
922 * any nested spaces.
923 */
924 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
925 enum isl_dim_type type, unsigned pos, unsigned n)
926 {
927 isl_id **ids = NULL;
928
929 if (!dim)
930 return NULL;
931 if (n == 0)
932 return isl_space_reset(dim, type);
933
934 if (!valid_dim_type(type))
935 isl_die(dim->ctx, isl_error_invalid,
936 "cannot insert dimensions of specified type",
937 goto error);
938
939 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
940
941 dim = isl_space_cow(dim);
942 if (!dim)
943 return NULL;
944
945 if (dim->ids) {
946 enum isl_dim_type t, o = isl_dim_param;
947 int off;
948 int s[3];
949 ids = isl_calloc_array(dim->ctx, isl_id *,
950 dim->nparam + dim->n_in + dim->n_out + n);
951 if (!ids)
952 goto error;
953 off = 0;
954 s[isl_dim_param - o] = dim->nparam;
955 s[isl_dim_in - o] = dim->n_in;
956 s[isl_dim_out - o] = dim->n_out;
957 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
958 if (t != type) {
959 get_ids(dim, t, 0, s[t - o], ids + off);
960 off += s[t - o];
961 } else {
962 get_ids(dim, t, 0, pos, ids + off);
963 off += pos + n;
964 get_ids(dim, t, pos, s[t - o] - pos, ids + off);
965 off += s[t - o] - pos;
966 }
967 }
968 free(dim->ids);
969 dim->ids = ids;
970 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
971 }
972 switch (type) {
973 case isl_dim_param: dim->nparam += n; break;
974 case isl_dim_in: dim->n_in += n; break;
975 case isl_dim_out: dim->n_out += n; break;
976 default: ;
977 }
978 dim = isl_space_reset(dim, type);
979
980 if (type == isl_dim_param) {
981 if (dim && dim->nested[0] &&
982 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
983 isl_dim_param, pos, n)))
984 goto error;
985 if (dim && dim->nested[1] &&
986 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
987 isl_dim_param, pos, n)))
988 goto error;
989 }
990
991 return dim;
992 error:
993 isl_space_free(dim);
994 return NULL;
995 }
996
997 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
998 enum isl_dim_type dst_type, unsigned dst_pos,
999 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1000 {
1001 int i;
1002
1003 if (!dim)
1004 return NULL;
1005 if (n == 0) {
1006 dim = isl_space_reset(dim, src_type);
1007 return isl_space_reset(dim, dst_type);
1008 }
1009
1010 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
1011 goto error);
1012
1013 if (dst_type == src_type && dst_pos == src_pos)
1014 return dim;
1015
1016 isl_assert(dim->ctx, dst_type != src_type, goto error);
1017
1018 dim = isl_space_reset(dim, src_type);
1019 dim = isl_space_reset(dim, dst_type);
1020
1021 dim = isl_space_cow(dim);
1022 if (!dim)
1023 return NULL;
1024
1025 if (dim->ids) {
1026 isl_id **ids;
1027 enum isl_dim_type t, o = isl_dim_param;
1028 int off;
1029 int s[3];
1030 ids = isl_calloc_array(dim->ctx, isl_id *,
1031 dim->nparam + dim->n_in + dim->n_out);
1032 if (!ids)
1033 goto error;
1034 off = 0;
1035 s[isl_dim_param - o] = dim->nparam;
1036 s[isl_dim_in - o] = dim->n_in;
1037 s[isl_dim_out - o] = dim->n_out;
1038 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1039 if (t == dst_type) {
1040 get_ids(dim, t, 0, dst_pos, ids + off);
1041 off += dst_pos;
1042 get_ids(dim, src_type, src_pos, n, ids + off);
1043 off += n;
1044 get_ids(dim, t, dst_pos, s[t - o] - dst_pos,
1045 ids + off);
1046 off += s[t - o] - dst_pos;
1047 } else if (t == src_type) {
1048 get_ids(dim, t, 0, src_pos, ids + off);
1049 off += src_pos;
1050 get_ids(dim, t, src_pos + n,
1051 s[t - o] - src_pos - n, ids + off);
1052 off += s[t - o] - src_pos - n;
1053 } else {
1054 get_ids(dim, t, 0, s[t - o], ids + off);
1055 off += s[t - o];
1056 }
1057 }
1058 free(dim->ids);
1059 dim->ids = ids;
1060 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
1061 }
1062
1063 switch (dst_type) {
1064 case isl_dim_param: dim->nparam += n; break;
1065 case isl_dim_in: dim->n_in += n; break;
1066 case isl_dim_out: dim->n_out += n; break;
1067 default: ;
1068 }
1069
1070 switch (src_type) {
1071 case isl_dim_param: dim->nparam -= n; break;
1072 case isl_dim_in: dim->n_in -= n; break;
1073 case isl_dim_out: dim->n_out -= n; break;
1074 default: ;
1075 }
1076
1077 if (dst_type != isl_dim_param && src_type != isl_dim_param)
1078 return dim;
1079
1080 for (i = 0; i < 2; ++i) {
1081 if (!dim->nested[i])
1082 continue;
1083 dim->nested[i] = isl_space_replace(dim->nested[i],
1084 isl_dim_param, dim);
1085 if (!dim->nested[i])
1086 goto error;
1087 }
1088
1089 return dim;
1090 error:
1091 isl_space_free(dim);
1092 return NULL;
1093 }
1094
1095 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
1096 __isl_take isl_space *right)
1097 {
1098 isl_space *dim;
1099
1100 if (!left || !right)
1101 goto error;
1102
1103 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1104 goto error);
1105 isl_assert(left->ctx,
1106 isl_space_tuple_match(left, isl_dim_out, right, isl_dim_in),
1107 goto error);
1108
1109 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
1110 if (!dim)
1111 goto error;
1112
1113 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
1114 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
1115 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
1116
1117 if (dim && left->tuple_id[0] &&
1118 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
1119 goto error;
1120 if (dim && right->tuple_id[1] &&
1121 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1122 goto error;
1123 if (dim && left->nested[0] &&
1124 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1125 goto error;
1126 if (dim && right->nested[1] &&
1127 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1128 goto error;
1129
1130 isl_space_free(left);
1131 isl_space_free(right);
1132
1133 return dim;
1134 error:
1135 isl_space_free(left);
1136 isl_space_free(right);
1137 return NULL;
1138 }
1139
1140 /* Given two map spaces { A -> C } and { B -> D }, construct the space
1141 * { [A -> B] -> [C -> D] }.
1142 * Given two set spaces { A } and { B }, construct the space { [A -> B] }.
1143 */
1144 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1145 __isl_take isl_space *right)
1146 {
1147 isl_space *dom1, *dom2, *nest1, *nest2;
1148 int is_set;
1149
1150 if (!left || !right)
1151 goto error;
1152
1153 is_set = isl_space_is_set(left);
1154 if (is_set != isl_space_is_set(right))
1155 isl_die(isl_space_get_ctx(left), isl_error_invalid,
1156 "expecting either two set spaces or two map spaces",
1157 goto error);
1158 if (is_set)
1159 return isl_space_range_product(left, right);
1160
1161 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1162 goto error);
1163
1164 dom1 = isl_space_domain(isl_space_copy(left));
1165 dom2 = isl_space_domain(isl_space_copy(right));
1166 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1167
1168 dom1 = isl_space_range(left);
1169 dom2 = isl_space_range(right);
1170 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1171
1172 return isl_space_join(isl_space_reverse(nest1), nest2);
1173 error:
1174 isl_space_free(left);
1175 isl_space_free(right);
1176 return NULL;
1177 }
1178
1179 /* Given two spaces { A -> C } and { B -> C }, construct the space
1180 * { [A -> B] -> C }
1181 */
1182 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1183 __isl_take isl_space *right)
1184 {
1185 isl_space *ran, *dom1, *dom2, *nest;
1186
1187 if (!left || !right)
1188 goto error;
1189
1190 if (!match(left, isl_dim_param, right, isl_dim_param))
1191 isl_die(left->ctx, isl_error_invalid,
1192 "parameters need to match", goto error);
1193 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1194 isl_die(left->ctx, isl_error_invalid,
1195 "ranges need to match", goto error);
1196
1197 ran = isl_space_range(isl_space_copy(left));
1198
1199 dom1 = isl_space_domain(left);
1200 dom2 = isl_space_domain(right);
1201 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1202
1203 return isl_space_join(isl_space_reverse(nest), ran);
1204 error:
1205 isl_space_free(left);
1206 isl_space_free(right);
1207 return NULL;
1208 }
1209
1210 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1211 __isl_take isl_space *right)
1212 {
1213 isl_space *dom, *ran1, *ran2, *nest;
1214
1215 if (!left || !right)
1216 goto error;
1217
1218 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1219 goto error);
1220 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1221 isl_die(left->ctx, isl_error_invalid,
1222 "domains need to match", goto error);
1223
1224 dom = isl_space_domain(isl_space_copy(left));
1225
1226 ran1 = isl_space_range(left);
1227 ran2 = isl_space_range(right);
1228 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1229
1230 return isl_space_join(isl_space_reverse(dom), nest);
1231 error:
1232 isl_space_free(left);
1233 isl_space_free(right);
1234 return NULL;
1235 }
1236
1237 /* Given a space of the form [A -> B] -> C, return the space A -> C.
1238 */
1239 __isl_give isl_space *isl_space_domain_factor_domain(
1240 __isl_take isl_space *space)
1241 {
1242 isl_space *nested;
1243 isl_space *domain;
1244
1245 if (!space)
1246 return NULL;
1247 if (!isl_space_domain_is_wrapping(space))
1248 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1249 "domain not a product", return isl_space_free(space));
1250
1251 nested = space->nested[0];
1252 domain = isl_space_copy(space);
1253 domain = isl_space_drop_dims(space, isl_dim_in,
1254 nested->n_in, nested->n_out);
1255 if (!domain)
1256 return isl_space_free(space);
1257 if (nested->tuple_id[0]) {
1258 domain->tuple_id[0] = isl_id_copy(nested->tuple_id[0]);
1259 if (!domain->tuple_id[0])
1260 goto error;
1261 }
1262 if (nested->nested[0]) {
1263 domain->nested[0] = isl_space_copy(nested->nested[0]);
1264 if (!domain->nested[0])
1265 goto error;
1266 }
1267
1268 isl_space_free(space);
1269 return domain;
1270 error:
1271 isl_space_free(space);
1272 isl_space_free(domain);
1273 return NULL;
1274 }
1275
1276 /* Given a space of the form A -> [B -> C], return the space A -> B.
1277 */
1278 __isl_give isl_space *isl_space_range_factor_domain(
1279 __isl_take isl_space *space)
1280 {
1281 isl_space *nested;
1282 isl_space *domain;
1283
1284 if (!space)
1285 return NULL;
1286 if (!isl_space_range_is_wrapping(space))
1287 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1288 "range not a product", return isl_space_free(space));
1289
1290 nested = space->nested[1];
1291 domain = isl_space_copy(space);
1292 domain = isl_space_drop_dims(space, isl_dim_out,
1293 nested->n_in, nested->n_out);
1294 if (!domain)
1295 return isl_space_free(space);
1296 if (nested->tuple_id[0]) {
1297 domain->tuple_id[1] = isl_id_copy(nested->tuple_id[0]);
1298 if (!domain->tuple_id[1])
1299 goto error;
1300 }
1301 if (nested->nested[0]) {
1302 domain->nested[1] = isl_space_copy(nested->nested[0]);
1303 if (!domain->nested[1])
1304 goto error;
1305 }
1306
1307 isl_space_free(space);
1308 return domain;
1309 error:
1310 isl_space_free(space);
1311 isl_space_free(domain);
1312 return NULL;
1313 }
1314
1315 /* Given a space of the form A -> [B -> C], return the space A -> C.
1316 */
1317 __isl_give isl_space *isl_space_range_factor_range(
1318 __isl_take isl_space *space)
1319 {
1320 isl_space *nested;
1321 isl_space *range;
1322
1323 if (!space)
1324 return NULL;
1325 if (!isl_space_range_is_wrapping(space))
1326 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1327 "range not a product", return isl_space_free(space));
1328
1329 nested = space->nested[1];
1330 range = isl_space_copy(space);
1331 range = isl_space_drop_dims(space, isl_dim_out, 0, nested->n_in);
1332 if (!range)
1333 return isl_space_free(space);
1334 if (nested->tuple_id[1]) {
1335 range->tuple_id[1] = isl_id_copy(nested->tuple_id[1]);
1336 if (!range->tuple_id[1])
1337 goto error;
1338 }
1339 if (nested->nested[1]) {
1340 range->nested[1] = isl_space_copy(nested->nested[1]);
1341 if (!range->nested[1])
1342 goto error;
1343 }
1344
1345 isl_space_free(space);
1346 return range;
1347 error:
1348 isl_space_free(space);
1349 isl_space_free(range);
1350 return NULL;
1351 }
1352
1353 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1354 {
1355 isl_ctx *ctx;
1356 isl_id **ids = NULL;
1357
1358 if (!dim)
1359 return NULL;
1360 ctx = isl_space_get_ctx(dim);
1361 if (!isl_space_is_set(dim))
1362 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1363 dim = isl_space_cow(dim);
1364 if (!dim)
1365 return NULL;
1366 if (dim->ids) {
1367 ids = isl_calloc_array(dim->ctx, isl_id *,
1368 dim->nparam + dim->n_out + dim->n_out);
1369 if (!ids)
1370 goto error;
1371 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1372 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1373 }
1374 dim->n_in = dim->n_out;
1375 if (ids) {
1376 free(dim->ids);
1377 dim->ids = ids;
1378 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1379 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1380 }
1381 isl_id_free(dim->tuple_id[0]);
1382 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1383 isl_space_free(dim->nested[0]);
1384 dim->nested[0] = isl_space_copy(dim->nested[1]);
1385 return dim;
1386 error:
1387 isl_space_free(dim);
1388 return NULL;
1389 }
1390
1391 __isl_give isl_space *isl_space_map_from_domain_and_range(
1392 __isl_take isl_space *domain, __isl_take isl_space *range)
1393 {
1394 if (!domain || !range)
1395 goto error;
1396 if (!isl_space_is_set(domain))
1397 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1398 "domain is not a set space", goto error);
1399 if (!isl_space_is_set(range))
1400 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1401 "range is not a set space", goto error);
1402 return isl_space_join(isl_space_reverse(domain), range);
1403 error:
1404 isl_space_free(domain);
1405 isl_space_free(range);
1406 return NULL;
1407 }
1408
1409 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1410 enum isl_dim_type type,
1411 unsigned first, unsigned n, __isl_take isl_id **ids)
1412 {
1413 int i;
1414
1415 for (i = 0; i < n ; ++i)
1416 dim = set_id(dim, type, first + i, ids[i]);
1417
1418 return dim;
1419 }
1420
1421 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1422 {
1423 unsigned t;
1424 isl_space *nested;
1425 isl_id **ids = NULL;
1426 isl_id *id;
1427
1428 if (!dim)
1429 return NULL;
1430 if (match(dim, isl_dim_in, dim, isl_dim_out))
1431 return dim;
1432
1433 dim = isl_space_cow(dim);
1434 if (!dim)
1435 return NULL;
1436
1437 id = dim->tuple_id[0];
1438 dim->tuple_id[0] = dim->tuple_id[1];
1439 dim->tuple_id[1] = id;
1440
1441 nested = dim->nested[0];
1442 dim->nested[0] = dim->nested[1];
1443 dim->nested[1] = nested;
1444
1445 if (dim->ids) {
1446 int n_id = dim->n_in + dim->n_out;
1447 ids = isl_alloc_array(dim->ctx, isl_id *, n_id);
1448 if (n_id && !ids)
1449 goto error;
1450 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1451 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1452 }
1453
1454 t = dim->n_in;
1455 dim->n_in = dim->n_out;
1456 dim->n_out = t;
1457
1458 if (dim->ids) {
1459 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1460 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1461 free(ids);
1462 }
1463
1464 return dim;
1465 error:
1466 free(ids);
1467 isl_space_free(dim);
1468 return NULL;
1469 }
1470
1471 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1472 enum isl_dim_type type, unsigned first, unsigned num)
1473 {
1474 int i;
1475
1476 if (!dim)
1477 return NULL;
1478
1479 if (num == 0)
1480 return isl_space_reset(dim, type);
1481
1482 if (!valid_dim_type(type))
1483 isl_die(dim->ctx, isl_error_invalid,
1484 "cannot drop dimensions of specified type", goto error);
1485
1486 if (first + num > n(dim, type) || first + num < first)
1487 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1488 "index out of bounds", return isl_space_free(dim));
1489 dim = isl_space_cow(dim);
1490 if (!dim)
1491 goto error;
1492 if (dim->ids) {
1493 dim = extend_ids(dim);
1494 if (!dim)
1495 goto error;
1496 for (i = 0; i < num; ++i)
1497 isl_id_free(get_id(dim, type, first + i));
1498 for (i = first+num; i < n(dim, type); ++i)
1499 set_id(dim, type, i - num, get_id(dim, type, i));
1500 switch (type) {
1501 case isl_dim_param:
1502 get_ids(dim, isl_dim_in, 0, dim->n_in,
1503 dim->ids + offset(dim, isl_dim_in) - num);
1504 case isl_dim_in:
1505 get_ids(dim, isl_dim_out, 0, dim->n_out,
1506 dim->ids + offset(dim, isl_dim_out) - num);
1507 default:
1508 ;
1509 }
1510 dim->n_id -= num;
1511 }
1512 switch (type) {
1513 case isl_dim_param: dim->nparam -= num; break;
1514 case isl_dim_in: dim->n_in -= num; break;
1515 case isl_dim_out: dim->n_out -= num; break;
1516 default: ;
1517 }
1518 dim = isl_space_reset(dim, type);
1519 if (type == isl_dim_param) {
1520 if (dim && dim->nested[0] &&
1521 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1522 isl_dim_param, first, num)))
1523 goto error;
1524 if (dim && dim->nested[1] &&
1525 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1526 isl_dim_param, first, num)))
1527 goto error;
1528 }
1529 return dim;
1530 error:
1531 isl_space_free(dim);
1532 return NULL;
1533 }
1534
1535 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1536 unsigned first, unsigned n)
1537 {
1538 if (!dim)
1539 return NULL;
1540 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1541 }
1542
1543 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1544 unsigned first, unsigned n)
1545 {
1546 if (!dim)
1547 return NULL;
1548 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1549 }
1550
1551 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1552 {
1553 if (!dim)
1554 return NULL;
1555 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1556 dim = isl_space_reverse(dim);
1557 dim = mark_as_set(dim);
1558 return dim;
1559 }
1560
1561 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1562 {
1563 if (!dim)
1564 return NULL;
1565 if (!isl_space_is_set(dim))
1566 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1567 "not a set space", goto error);
1568 dim = isl_space_reverse(dim);
1569 dim = isl_space_reset(dim, isl_dim_out);
1570 return dim;
1571 error:
1572 isl_space_free(dim);
1573 return NULL;
1574 }
1575
1576 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1577 {
1578 if (!dim)
1579 return NULL;
1580 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1581 dim = mark_as_set(dim);
1582 return dim;
1583 }
1584
1585 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1586 {
1587 if (!dim)
1588 return NULL;
1589 if (!isl_space_is_set(dim))
1590 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1591 "not a set space", goto error);
1592 return isl_space_reset(dim, isl_dim_in);
1593 error:
1594 isl_space_free(dim);
1595 return NULL;
1596 }
1597
1598 /* Given a map space A -> B, return the map space [A -> B] -> A.
1599 */
1600 __isl_give isl_space *isl_space_domain_map(__isl_take isl_space *space)
1601 {
1602 isl_space *domain;
1603
1604 domain = isl_space_from_range(isl_space_domain(isl_space_copy(space)));
1605 space = isl_space_from_domain(isl_space_wrap(space));
1606 space = isl_space_join(space, domain);
1607
1608 return space;
1609 }
1610
1611 /* Given a map space A -> B, return the map space [A -> B] -> B.
1612 */
1613 __isl_give isl_space *isl_space_range_map(__isl_take isl_space *space)
1614 {
1615 isl_space *range;
1616
1617 range = isl_space_from_range(isl_space_range(isl_space_copy(space)));
1618 space = isl_space_from_domain(isl_space_wrap(space));
1619 space = isl_space_join(space, range);
1620
1621 return space;
1622 }
1623
1624 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1625 {
1626 if (isl_space_is_params(space))
1627 return space;
1628 space = isl_space_drop_dims(space,
1629 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1630 space = isl_space_drop_dims(space,
1631 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1632 space = mark_as_params(space);
1633 return space;
1634 }
1635
1636 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1637 {
1638 if (!space)
1639 return NULL;
1640 if (!isl_space_is_params(space))
1641 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1642 "not a parameter space", goto error);
1643 return isl_space_reset(space, isl_dim_set);
1644 error:
1645 isl_space_free(space);
1646 return NULL;
1647 }
1648
1649 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1650 {
1651 dim = isl_space_cow(dim);
1652 if (!dim)
1653 return NULL;
1654
1655 dim->n_out += dim->n_in;
1656 dim->n_in = 0;
1657 dim = isl_space_reset(dim, isl_dim_in);
1658 dim = isl_space_reset(dim, isl_dim_out);
1659
1660 return dim;
1661 }
1662
1663 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1664 unsigned n_div)
1665 {
1666 int i;
1667
1668 if (!dim)
1669 return NULL;
1670 if (n_div == 0 &&
1671 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1672 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1673 dim = isl_space_cow(dim);
1674 if (!dim)
1675 return NULL;
1676 dim->n_out += dim->nparam + dim->n_in + n_div;
1677 dim->nparam = 0;
1678 dim->n_in = 0;
1679
1680 for (i = 0; i < dim->n_id; ++i)
1681 isl_id_free(get_id(dim, isl_dim_out, i));
1682 dim->n_id = 0;
1683 dim = isl_space_reset(dim, isl_dim_in);
1684 dim = isl_space_reset(dim, isl_dim_out);
1685
1686 return dim;
1687 }
1688
1689 /* Are the two spaces the same, including positions and names of parameters?
1690 */
1691 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1692 {
1693 if (!dim1 || !dim2)
1694 return -1;
1695 if (dim1 == dim2)
1696 return 1;
1697 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1698 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1699 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1700 }
1701
1702 /* Is space1 equal to the domain of space2?
1703 *
1704 * In the internal version we also allow space2 to be the space of a set,
1705 * provided space1 is a parameter space.
1706 */
1707 int isl_space_is_domain_internal(__isl_keep isl_space *space1,
1708 __isl_keep isl_space *space2)
1709 {
1710 if (!space1 || !space2)
1711 return -1;
1712 if (!isl_space_is_set(space1))
1713 return 0;
1714 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1715 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1716 }
1717
1718 /* Is space1 equal to the domain of space2?
1719 */
1720 int isl_space_is_domain(__isl_keep isl_space *space1,
1721 __isl_keep isl_space *space2)
1722 {
1723 if (!space2)
1724 return -1;
1725 if (!isl_space_is_map(space2))
1726 return 0;
1727 return isl_space_is_domain_internal(space1, space2);
1728 }
1729
1730 /* Is space1 equal to the range of space2?
1731 *
1732 * In the internal version, space2 is allowed to be the space of a set,
1733 * in which case it should be equal to space1.
1734 */
1735 int isl_space_is_range_internal(__isl_keep isl_space *space1,
1736 __isl_keep isl_space *space2)
1737 {
1738 if (!space1 || !space2)
1739 return -1;
1740 if (!isl_space_is_set(space1))
1741 return 0;
1742 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1743 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_out);
1744 }
1745
1746 /* Is space1 equal to the range of space2?
1747 */
1748 int isl_space_is_range(__isl_keep isl_space *space1,
1749 __isl_keep isl_space *space2)
1750 {
1751 if (!space2)
1752 return -1;
1753 if (!isl_space_is_map(space2))
1754 return 0;
1755 return isl_space_is_range_internal(space1, space2);
1756 }
1757
1758 int isl_space_compatible(__isl_keep isl_space *dim1,
1759 __isl_keep isl_space *dim2)
1760 {
1761 return dim1->nparam == dim2->nparam &&
1762 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1763 }
1764
1765 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1766 {
1767 int i;
1768 isl_id *id;
1769
1770 if (!dim)
1771 return hash;
1772
1773 isl_hash_byte(hash, dim->nparam % 256);
1774 isl_hash_byte(hash, dim->n_in % 256);
1775 isl_hash_byte(hash, dim->n_out % 256);
1776
1777 for (i = 0; i < dim->nparam; ++i) {
1778 id = get_id(dim, isl_dim_param, i);
1779 hash = isl_hash_id(hash, id);
1780 }
1781
1782 id = tuple_id(dim, isl_dim_in);
1783 hash = isl_hash_id(hash, id);
1784 id = tuple_id(dim, isl_dim_out);
1785 hash = isl_hash_id(hash, id);
1786
1787 hash = isl_hash_dim(hash, dim->nested[0]);
1788 hash = isl_hash_dim(hash, dim->nested[1]);
1789
1790 return hash;
1791 }
1792
1793 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1794 {
1795 uint32_t hash;
1796
1797 if (!dim)
1798 return 0;
1799
1800 hash = isl_hash_init();
1801 hash = isl_hash_dim(hash, dim);
1802
1803 return hash;
1804 }
1805
1806 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1807 {
1808 if (!dim)
1809 return -1;
1810
1811 if (!isl_space_is_set(dim))
1812 return 0;
1813
1814 return dim->nested[1] != NULL;
1815 }
1816
1817 /* Is "space" the space of a map where the domain is a wrapped map space?
1818 */
1819 int isl_space_domain_is_wrapping(__isl_keep isl_space *space)
1820 {
1821 if (!space)
1822 return -1;
1823
1824 if (isl_space_is_set(space))
1825 return 0;
1826
1827 return space->nested[0] != NULL;
1828 }
1829
1830 /* Is "space" the space of a map where the range is a wrapped map space?
1831 */
1832 int isl_space_range_is_wrapping(__isl_keep isl_space *space)
1833 {
1834 if (!space)
1835 return -1;
1836
1837 if (isl_space_is_set(space))
1838 return 0;
1839
1840 return space->nested[1] != NULL;
1841 }
1842
1843 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1844 {
1845 isl_space *wrap;
1846
1847 if (!dim)
1848 return NULL;
1849
1850 wrap = isl_space_set_alloc(dim->ctx,
1851 dim->nparam, dim->n_in + dim->n_out);
1852
1853 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1854 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1855 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1856
1857 if (!wrap)
1858 goto error;
1859
1860 wrap->nested[1] = dim;
1861
1862 return wrap;
1863 error:
1864 isl_space_free(dim);
1865 return NULL;
1866 }
1867
1868 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1869 {
1870 isl_space *unwrap;
1871
1872 if (!dim)
1873 return NULL;
1874
1875 if (!isl_space_is_wrapping(dim))
1876 isl_die(dim->ctx, isl_error_invalid, "not a wrapping space",
1877 goto error);
1878
1879 unwrap = isl_space_copy(dim->nested[1]);
1880 isl_space_free(dim);
1881
1882 return unwrap;
1883 error:
1884 isl_space_free(dim);
1885 return NULL;
1886 }
1887
1888 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1889 {
1890 if (type != isl_dim_in && type != isl_dim_out)
1891 return 0;
1892 if (!dim)
1893 return -1;
1894 if (dim->tuple_id[type - isl_dim_in])
1895 return 1;
1896 if (dim->nested[type - isl_dim_in])
1897 return 1;
1898 return 0;
1899 }
1900
1901 int isl_space_may_be_set(__isl_keep isl_space *dim)
1902 {
1903 if (!dim)
1904 return -1;
1905 if (isl_space_is_set(dim))
1906 return 1;
1907 if (isl_space_dim(dim, isl_dim_in) != 0)
1908 return 0;
1909 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1910 return 0;
1911 return 1;
1912 }
1913
1914 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1915 enum isl_dim_type type)
1916 {
1917 if (!isl_space_is_named_or_nested(dim, type))
1918 return dim;
1919
1920 dim = isl_space_cow(dim);
1921 if (!dim)
1922 return NULL;
1923
1924 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1925 dim->tuple_id[type - isl_dim_in] = NULL;
1926 isl_space_free(dim->nested[type - isl_dim_in]);
1927 dim->nested[type - isl_dim_in] = NULL;
1928
1929 return dim;
1930 }
1931
1932 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1933 {
1934 if (!dim)
1935 return NULL;
1936 if (!dim->nested[0] && !dim->nested[1])
1937 return dim;
1938
1939 if (dim->nested[0])
1940 dim = isl_space_reset(dim, isl_dim_in);
1941 if (dim && dim->nested[1])
1942 dim = isl_space_reset(dim, isl_dim_out);
1943
1944 return dim;
1945 }
1946
1947 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1948 {
1949 if (!dim)
1950 return NULL;
1951 if (!dim->nested[0])
1952 return dim;
1953
1954 return isl_space_reset(dim, isl_dim_in);
1955 }
1956
1957 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1958 {
1959 if (!dim)
1960 return NULL;
1961 if (!dim->nested[1])
1962 return dim;
1963
1964 return isl_space_reset(dim, isl_dim_out);
1965 }
1966
1967 /* Replace the dimensions of the given type of dst by those of src.
1968 */
1969 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1970 enum isl_dim_type type, __isl_keep isl_space *src)
1971 {
1972 dst = isl_space_cow(dst);
1973
1974 if (!dst || !src)
1975 goto error;
1976
1977 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1978 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1979 dst = copy_ids(dst, type, 0, src, type);
1980
1981 if (dst && type == isl_dim_param) {
1982 int i;
1983 for (i = 0; i <= 1; ++i) {
1984 if (!dst->nested[i])
1985 continue;
1986 dst->nested[i] = isl_space_replace(dst->nested[i],
1987 type, src);
1988 if (!dst->nested[i])
1989 goto error;
1990 }
1991 }
1992
1993 return dst;
1994 error:
1995 isl_space_free(dst);
1996 return NULL;
1997 }
1998
1999 /* Given a dimension specification "dim" of a set, create a dimension
2000 * specification for the lift of the set. In particular, the result
2001 * is of the form [dim -> local[..]], with n_local variables in the
2002 * range of the wrapped map.
2003 */
2004 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
2005 {
2006 isl_space *local_dim;
2007
2008 if (!dim)
2009 return NULL;
2010
2011 local_dim = isl_space_dup(dim);
2012 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
2013 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
2014 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
2015 dim = isl_space_join(isl_space_from_domain(dim),
2016 isl_space_from_range(local_dim));
2017 dim = isl_space_wrap(dim);
2018 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
2019
2020 return dim;
2021 }
2022
2023 int isl_space_can_zip(__isl_keep isl_space *dim)
2024 {
2025 if (!dim)
2026 return -1;
2027
2028 return dim->nested[0] && dim->nested[1];
2029 }
2030
2031 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
2032 {
2033 isl_space *dom, *ran;
2034 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
2035
2036 if (!isl_space_can_zip(dim))
2037 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
2038 goto error);
2039
2040 if (!dim)
2041 return NULL;
2042 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
2043 ran = isl_space_unwrap(isl_space_range(dim));
2044 dom_dom = isl_space_domain(isl_space_copy(dom));
2045 dom_ran = isl_space_range(dom);
2046 ran_dom = isl_space_domain(isl_space_copy(ran));
2047 ran_ran = isl_space_range(ran);
2048 dom = isl_space_join(isl_space_from_domain(dom_dom),
2049 isl_space_from_range(ran_dom));
2050 ran = isl_space_join(isl_space_from_domain(dom_ran),
2051 isl_space_from_range(ran_ran));
2052 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2053 isl_space_from_range(isl_space_wrap(ran)));
2054 error:
2055 isl_space_free(dim);
2056 return NULL;
2057 }
2058
2059 /* Can we apply isl_space_curry to "space"?
2060 * That is, does it have a nested relation in its domain?
2061 */
2062 int isl_space_can_curry(__isl_keep isl_space *space)
2063 {
2064 if (!space)
2065 return -1;
2066
2067 return !!space->nested[0];
2068 }
2069
2070 /* Given a space (A -> B) -> C, return the corresponding space
2071 * A -> (B -> C).
2072 */
2073 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
2074 {
2075 isl_space *dom, *ran;
2076 isl_space *dom_dom, *dom_ran;
2077
2078 if (!space)
2079 return NULL;
2080
2081 if (!isl_space_can_curry(space))
2082 isl_die(space->ctx, isl_error_invalid,
2083 "space cannot be curried", goto error);
2084
2085 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
2086 ran = isl_space_range(space);
2087 dom_dom = isl_space_domain(isl_space_copy(dom));
2088 dom_ran = isl_space_range(dom);
2089 ran = isl_space_join(isl_space_from_domain(dom_ran),
2090 isl_space_from_range(ran));
2091 return isl_space_join(isl_space_from_domain(dom_dom),
2092 isl_space_from_range(isl_space_wrap(ran)));
2093 error:
2094 isl_space_free(space);
2095 return NULL;
2096 }
2097
2098 /* Can we apply isl_space_uncurry to "space"?
2099 * That is, does it have a nested relation in its range?
2100 */
2101 int isl_space_can_uncurry(__isl_keep isl_space *space)
2102 {
2103 if (!space)
2104 return -1;
2105
2106 return !!space->nested[1];
2107 }
2108
2109 /* Given a space A -> (B -> C), return the corresponding space
2110 * (A -> B) -> C.
2111 */
2112 __isl_give isl_space *isl_space_uncurry(__isl_take isl_space *space)
2113 {
2114 isl_space *dom, *ran;
2115 isl_space *ran_dom, *ran_ran;
2116
2117 if (!space)
2118 return NULL;
2119
2120 if (!isl_space_can_uncurry(space))
2121 isl_die(space->ctx, isl_error_invalid,
2122 "space cannot be uncurried",
2123 return isl_space_free(space));
2124
2125 dom = isl_space_domain(isl_space_copy(space));
2126 ran = isl_space_unwrap(isl_space_range(space));
2127 ran_dom = isl_space_domain(isl_space_copy(ran));
2128 ran_ran = isl_space_range(ran);
2129 dom = isl_space_join(isl_space_from_domain(dom),
2130 isl_space_from_range(ran_dom));
2131 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2132 isl_space_from_range(ran_ran));
2133 }
2134
2135 int isl_space_has_named_params(__isl_keep isl_space *dim)
2136 {
2137 int i;
2138 unsigned off;
2139
2140 if (!dim)
2141 return -1;
2142 if (dim->nparam == 0)
2143 return 1;
2144 off = isl_space_offset(dim, isl_dim_param);
2145 if (off + dim->nparam > dim->n_id)
2146 return 0;
2147 for (i = 0; i < dim->nparam; ++i)
2148 if (!dim->ids[off + i])
2149 return 0;
2150 return 1;
2151 }
2152
2153 /* Align the initial parameters of dim1 to match the order in dim2.
2154 */
2155 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
2156 __isl_take isl_space *dim2)
2157 {
2158 isl_reordering *exp;
2159
2160 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
2161 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
2162 "parameter alignment requires named parameters",
2163 goto error);
2164
2165 dim2 = isl_space_params(dim2);
2166 exp = isl_parameter_alignment_reordering(dim1, dim2);
2167 exp = isl_reordering_extend_space(exp, dim1);
2168 isl_space_free(dim2);
2169 if (!exp)
2170 return NULL;
2171 dim1 = isl_space_copy(exp->dim);
2172 isl_reordering_free(exp);
2173 return dim1;
2174 error:
2175 isl_space_free(dim1);
2176 isl_space_free(dim2);
2177 return NULL;
2178 }
2179
2180 /* Given the space of set (domain), construct a space for a map
2181 * with as domain the given space and as range the range of "model".
2182 */
2183 __isl_give isl_space *isl_space_extend_domain_with_range(
2184 __isl_take isl_space *space, __isl_take isl_space *model)
2185 {
2186 if (!model)
2187 goto error;
2188
2189 space = isl_space_from_domain(space);
2190 space = isl_space_add_dims(space, isl_dim_out,
2191 isl_space_dim(model, isl_dim_out));
2192 if (isl_space_has_tuple_id(model, isl_dim_out))
2193 space = isl_space_set_tuple_id(space, isl_dim_out,
2194 isl_space_get_tuple_id(model, isl_dim_out));
2195 if (!space)
2196 goto error;
2197 if (model->nested[1]) {
2198 isl_space *nested = isl_space_copy(model->nested[1]);
2199 int n_nested, n_space;
2200 nested = isl_space_align_params(nested, isl_space_copy(space));
2201 n_nested = isl_space_dim(nested, isl_dim_param);
2202 n_space = isl_space_dim(space, isl_dim_param);
2203 if (n_nested > n_space)
2204 nested = isl_space_drop_dims(nested, isl_dim_param,
2205 n_space, n_nested - n_space);
2206 if (!nested)
2207 goto error;
2208 space->nested[1] = nested;
2209 }
2210 isl_space_free(model);
2211 return space;
2212 error:
2213 isl_space_free(model);
2214 isl_space_free(space);
2215 return NULL;
2216 }
2217
2218 /* Compare the "type" dimensions of two isl_spaces.
2219 *
2220 * The order is fairly arbitrary.
2221 */
2222 static int isl_space_cmp_type(__isl_keep isl_space *space1,
2223 __isl_keep isl_space *space2, enum isl_dim_type type)
2224 {
2225 int cmp;
2226 isl_space *nested1, *nested2;
2227
2228 if (isl_space_dim(space1, type) != isl_space_dim(space2, type))
2229 return isl_space_dim(space1, type) -
2230 isl_space_dim(space2, type);
2231
2232 cmp = isl_id_cmp(tuple_id(space1, type), tuple_id(space2, type));
2233 if (cmp != 0)
2234 return cmp;
2235
2236 nested1 = nested(space1, type);
2237 nested2 = nested(space2, type);
2238 if (!nested1 != !nested2)
2239 return !nested1 - !nested2;
2240
2241 if (nested1)
2242 return isl_space_cmp(nested1, nested2);
2243
2244 return 0;
2245 }
2246
2247 /* Compare two isl_spaces.
2248 *
2249 * The order is fairly arbitrary.
2250 */
2251 int isl_space_cmp(__isl_keep isl_space *space1, __isl_keep isl_space *space2)
2252 {
2253 int i;
2254 int cmp;
2255
2256 if (space1 == space2)
2257 return 0;
2258 if (!space1)
2259 return -1;
2260 if (!space2)
2261 return 1;
2262
2263 cmp = isl_space_cmp_type(space1, space2, isl_dim_param);
2264 if (cmp != 0)
2265 return cmp;
2266 cmp = isl_space_cmp_type(space1, space2, isl_dim_in);
2267 if (cmp != 0)
2268 return cmp;
2269 cmp = isl_space_cmp_type(space1, space2, isl_dim_out);
2270 if (cmp != 0)
2271 return cmp;
2272
2273 if (!space1->ids && !space2->ids)
2274 return 0;
2275
2276 for (i = 0; i < n(space1, isl_dim_param); ++i) {
2277 cmp = isl_id_cmp(get_id(space1, isl_dim_param, i),
2278 get_id(space2, isl_dim_param, i));
2279 if (cmp != 0)
2280 return cmp;
2281 }
2282
2283 return 0;
2284 }
Integer set library