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include/isl/deprecated/*int.h: allow inclusion from C++
[isl.git] / isl_space.c
blob11169e3908e1524a5f6cb5ed74aad44be0cb43d1
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 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1141 __isl_take isl_space *right)
1142 {
1143 isl_space *dom1, *dom2, *nest1, *nest2;
1144
1145 if (!left || !right)
1146 goto error;
1147
1148 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1149 goto error);
1150
1151 dom1 = isl_space_domain(isl_space_copy(left));
1152 dom2 = isl_space_domain(isl_space_copy(right));
1153 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1154
1155 dom1 = isl_space_range(left);
1156 dom2 = isl_space_range(right);
1157 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1158
1159 return isl_space_join(isl_space_reverse(nest1), nest2);
1160 error:
1161 isl_space_free(left);
1162 isl_space_free(right);
1163 return NULL;
1164 }
1165
1166 /* Given two spaces { A -> C } and { B -> C }, construct the space
1167 * { [A -> B] -> C }
1168 */
1169 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1170 __isl_take isl_space *right)
1171 {
1172 isl_space *ran, *dom1, *dom2, *nest;
1173
1174 if (!left || !right)
1175 goto error;
1176
1177 if (!match(left, isl_dim_param, right, isl_dim_param))
1178 isl_die(left->ctx, isl_error_invalid,
1179 "parameters need to match", goto error);
1180 if (!isl_space_tuple_match(left, isl_dim_out, right, isl_dim_out))
1181 isl_die(left->ctx, isl_error_invalid,
1182 "ranges need to match", goto error);
1183
1184 ran = isl_space_range(isl_space_copy(left));
1185
1186 dom1 = isl_space_domain(left);
1187 dom2 = isl_space_domain(right);
1188 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1189
1190 return isl_space_join(isl_space_reverse(nest), ran);
1191 error:
1192 isl_space_free(left);
1193 isl_space_free(right);
1194 return NULL;
1195 }
1196
1197 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1198 __isl_take isl_space *right)
1199 {
1200 isl_space *dom, *ran1, *ran2, *nest;
1201
1202 if (!left || !right)
1203 goto error;
1204
1205 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1206 goto error);
1207 if (!isl_space_tuple_match(left, isl_dim_in, right, isl_dim_in))
1208 isl_die(left->ctx, isl_error_invalid,
1209 "domains need to match", goto error);
1210
1211 dom = isl_space_domain(isl_space_copy(left));
1212
1213 ran1 = isl_space_range(left);
1214 ran2 = isl_space_range(right);
1215 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1216
1217 return isl_space_join(isl_space_reverse(dom), nest);
1218 error:
1219 isl_space_free(left);
1220 isl_space_free(right);
1221 return NULL;
1222 }
1223
1224 /* Given a space of the form [A -> B] -> C, return the space A -> C.
1225 */
1226 __isl_give isl_space *isl_space_domain_factor_domain(
1227 __isl_take isl_space *space)
1228 {
1229 isl_space *nested;
1230 isl_space *domain;
1231
1232 if (!space)
1233 return NULL;
1234 if (!isl_space_domain_is_wrapping(space))
1235 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1236 "domain not a product", return isl_space_free(space));
1237
1238 nested = space->nested[0];
1239 domain = isl_space_copy(space);
1240 domain = isl_space_drop_dims(space, isl_dim_in,
1241 nested->n_in, nested->n_out);
1242 if (!domain)
1243 return isl_space_free(space);
1244 if (nested->tuple_id[0]) {
1245 domain->tuple_id[0] = isl_id_copy(nested->tuple_id[0]);
1246 if (!domain->tuple_id[0])
1247 goto error;
1248 }
1249 if (nested->nested[0]) {
1250 domain->nested[0] = isl_space_copy(nested->nested[0]);
1251 if (!domain->nested[0])
1252 goto error;
1253 }
1254
1255 isl_space_free(space);
1256 return domain;
1257 error:
1258 isl_space_free(space);
1259 isl_space_free(domain);
1260 return NULL;
1261 }
1262
1263 /* Given a space of the form A -> [B -> C], return the space A -> B.
1264 */
1265 __isl_give isl_space *isl_space_range_factor_domain(
1266 __isl_take isl_space *space)
1267 {
1268 isl_space *nested;
1269 isl_space *domain;
1270
1271 if (!space)
1272 return NULL;
1273 if (!isl_space_range_is_wrapping(space))
1274 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1275 "range not a product", return isl_space_free(space));
1276
1277 nested = space->nested[1];
1278 domain = isl_space_copy(space);
1279 domain = isl_space_drop_dims(space, isl_dim_out,
1280 nested->n_in, nested->n_out);
1281 if (!domain)
1282 return isl_space_free(space);
1283 if (nested->tuple_id[0]) {
1284 domain->tuple_id[1] = isl_id_copy(nested->tuple_id[0]);
1285 if (!domain->tuple_id[1])
1286 goto error;
1287 }
1288 if (nested->nested[0]) {
1289 domain->nested[1] = isl_space_copy(nested->nested[0]);
1290 if (!domain->nested[1])
1291 goto error;
1292 }
1293
1294 isl_space_free(space);
1295 return domain;
1296 error:
1297 isl_space_free(space);
1298 isl_space_free(domain);
1299 return NULL;
1300 }
1301
1302 /* Given a space of the form A -> [B -> C], return the space A -> C.
1303 */
1304 __isl_give isl_space *isl_space_range_factor_range(
1305 __isl_take isl_space *space)
1306 {
1307 isl_space *nested;
1308 isl_space *range;
1309
1310 if (!space)
1311 return NULL;
1312 if (!isl_space_range_is_wrapping(space))
1313 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1314 "range not a product", return isl_space_free(space));
1315
1316 nested = space->nested[1];
1317 range = isl_space_copy(space);
1318 range = isl_space_drop_dims(space, isl_dim_out, 0, nested->n_in);
1319 if (!range)
1320 return isl_space_free(space);
1321 if (nested->tuple_id[1]) {
1322 range->tuple_id[1] = isl_id_copy(nested->tuple_id[1]);
1323 if (!range->tuple_id[1])
1324 goto error;
1325 }
1326 if (nested->nested[1]) {
1327 range->nested[1] = isl_space_copy(nested->nested[1]);
1328 if (!range->nested[1])
1329 goto error;
1330 }
1331
1332 isl_space_free(space);
1333 return range;
1334 error:
1335 isl_space_free(space);
1336 isl_space_free(range);
1337 return NULL;
1338 }
1339
1340 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1341 {
1342 isl_ctx *ctx;
1343 isl_id **ids = NULL;
1344
1345 if (!dim)
1346 return NULL;
1347 ctx = isl_space_get_ctx(dim);
1348 if (!isl_space_is_set(dim))
1349 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1350 dim = isl_space_cow(dim);
1351 if (!dim)
1352 return NULL;
1353 if (dim->ids) {
1354 ids = isl_calloc_array(dim->ctx, isl_id *,
1355 dim->nparam + dim->n_out + dim->n_out);
1356 if (!ids)
1357 goto error;
1358 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1359 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1360 }
1361 dim->n_in = dim->n_out;
1362 if (ids) {
1363 free(dim->ids);
1364 dim->ids = ids;
1365 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1366 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1367 }
1368 isl_id_free(dim->tuple_id[0]);
1369 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1370 isl_space_free(dim->nested[0]);
1371 dim->nested[0] = isl_space_copy(dim->nested[1]);
1372 return dim;
1373 error:
1374 isl_space_free(dim);
1375 return NULL;
1376 }
1377
1378 __isl_give isl_space *isl_space_map_from_domain_and_range(
1379 __isl_take isl_space *domain, __isl_take isl_space *range)
1380 {
1381 if (!domain || !range)
1382 goto error;
1383 if (!isl_space_is_set(domain))
1384 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1385 "domain is not a set space", goto error);
1386 if (!isl_space_is_set(range))
1387 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1388 "range is not a set space", goto error);
1389 return isl_space_join(isl_space_reverse(domain), range);
1390 error:
1391 isl_space_free(domain);
1392 isl_space_free(range);
1393 return NULL;
1394 }
1395
1396 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1397 enum isl_dim_type type,
1398 unsigned first, unsigned n, __isl_take isl_id **ids)
1399 {
1400 int i;
1401
1402 for (i = 0; i < n ; ++i)
1403 dim = set_id(dim, type, first + i, ids[i]);
1404
1405 return dim;
1406 }
1407
1408 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1409 {
1410 unsigned t;
1411 isl_space *nested;
1412 isl_id **ids = NULL;
1413 isl_id *id;
1414
1415 if (!dim)
1416 return NULL;
1417 if (match(dim, isl_dim_in, dim, isl_dim_out))
1418 return dim;
1419
1420 dim = isl_space_cow(dim);
1421 if (!dim)
1422 return NULL;
1423
1424 id = dim->tuple_id[0];
1425 dim->tuple_id[0] = dim->tuple_id[1];
1426 dim->tuple_id[1] = id;
1427
1428 nested = dim->nested[0];
1429 dim->nested[0] = dim->nested[1];
1430 dim->nested[1] = nested;
1431
1432 if (dim->ids) {
1433 int n_id = dim->n_in + dim->n_out;
1434 ids = isl_alloc_array(dim->ctx, isl_id *, n_id);
1435 if (n_id && !ids)
1436 goto error;
1437 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1438 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1439 }
1440
1441 t = dim->n_in;
1442 dim->n_in = dim->n_out;
1443 dim->n_out = t;
1444
1445 if (dim->ids) {
1446 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1447 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1448 free(ids);
1449 }
1450
1451 return dim;
1452 error:
1453 free(ids);
1454 isl_space_free(dim);
1455 return NULL;
1456 }
1457
1458 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1459 enum isl_dim_type type, unsigned first, unsigned num)
1460 {
1461 int i;
1462
1463 if (!dim)
1464 return NULL;
1465
1466 if (num == 0)
1467 return isl_space_reset(dim, type);
1468
1469 if (!valid_dim_type(type))
1470 isl_die(dim->ctx, isl_error_invalid,
1471 "cannot drop dimensions of specified type", goto error);
1472
1473 if (first + num > n(dim, type) || first + num < first)
1474 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1475 "index out of bounds", return isl_space_free(dim));
1476 dim = isl_space_cow(dim);
1477 if (!dim)
1478 goto error;
1479 if (dim->ids) {
1480 dim = extend_ids(dim);
1481 if (!dim)
1482 goto error;
1483 for (i = 0; i < num; ++i)
1484 isl_id_free(get_id(dim, type, first + i));
1485 for (i = first+num; i < n(dim, type); ++i)
1486 set_id(dim, type, i - num, get_id(dim, type, i));
1487 switch (type) {
1488 case isl_dim_param:
1489 get_ids(dim, isl_dim_in, 0, dim->n_in,
1490 dim->ids + offset(dim, isl_dim_in) - num);
1491 case isl_dim_in:
1492 get_ids(dim, isl_dim_out, 0, dim->n_out,
1493 dim->ids + offset(dim, isl_dim_out) - num);
1494 default:
1495 ;
1496 }
1497 dim->n_id -= num;
1498 }
1499 switch (type) {
1500 case isl_dim_param: dim->nparam -= num; break;
1501 case isl_dim_in: dim->n_in -= num; break;
1502 case isl_dim_out: dim->n_out -= num; break;
1503 default: ;
1504 }
1505 dim = isl_space_reset(dim, type);
1506 if (type == isl_dim_param) {
1507 if (dim && dim->nested[0] &&
1508 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1509 isl_dim_param, first, num)))
1510 goto error;
1511 if (dim && dim->nested[1] &&
1512 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1513 isl_dim_param, first, num)))
1514 goto error;
1515 }
1516 return dim;
1517 error:
1518 isl_space_free(dim);
1519 return NULL;
1520 }
1521
1522 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1523 unsigned first, unsigned n)
1524 {
1525 if (!dim)
1526 return NULL;
1527 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1528 }
1529
1530 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1531 unsigned first, unsigned n)
1532 {
1533 if (!dim)
1534 return NULL;
1535 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1536 }
1537
1538 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1539 {
1540 if (!dim)
1541 return NULL;
1542 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1543 dim = isl_space_reverse(dim);
1544 dim = mark_as_set(dim);
1545 return dim;
1546 }
1547
1548 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1549 {
1550 if (!dim)
1551 return NULL;
1552 if (!isl_space_is_set(dim))
1553 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1554 "not a set space", goto error);
1555 dim = isl_space_reverse(dim);
1556 dim = isl_space_reset(dim, isl_dim_out);
1557 return dim;
1558 error:
1559 isl_space_free(dim);
1560 return NULL;
1561 }
1562
1563 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1564 {
1565 if (!dim)
1566 return NULL;
1567 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1568 dim = mark_as_set(dim);
1569 return dim;
1570 }
1571
1572 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1573 {
1574 if (!dim)
1575 return NULL;
1576 if (!isl_space_is_set(dim))
1577 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1578 "not a set space", goto error);
1579 return isl_space_reset(dim, isl_dim_in);
1580 error:
1581 isl_space_free(dim);
1582 return NULL;
1583 }
1584
1585 /* Given a map space A -> B, return the map space [A -> B] -> A.
1586 */
1587 __isl_give isl_space *isl_space_domain_map(__isl_take isl_space *space)
1588 {
1589 isl_space *domain;
1590
1591 domain = isl_space_from_range(isl_space_domain(isl_space_copy(space)));
1592 space = isl_space_from_domain(isl_space_wrap(space));
1593 space = isl_space_join(space, domain);
1594
1595 return space;
1596 }
1597
1598 /* Given a map space A -> B, return the map space [A -> B] -> B.
1599 */
1600 __isl_give isl_space *isl_space_range_map(__isl_take isl_space *space)
1601 {
1602 isl_space *range;
1603
1604 range = isl_space_from_range(isl_space_range(isl_space_copy(space)));
1605 space = isl_space_from_domain(isl_space_wrap(space));
1606 space = isl_space_join(space, range);
1607
1608 return space;
1609 }
1610
1611 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1612 {
1613 if (isl_space_is_params(space))
1614 return space;
1615 space = isl_space_drop_dims(space,
1616 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1617 space = isl_space_drop_dims(space,
1618 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1619 space = mark_as_params(space);
1620 return space;
1621 }
1622
1623 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1624 {
1625 if (!space)
1626 return NULL;
1627 if (!isl_space_is_params(space))
1628 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1629 "not a parameter space", goto error);
1630 return isl_space_reset(space, isl_dim_set);
1631 error:
1632 isl_space_free(space);
1633 return NULL;
1634 }
1635
1636 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1637 {
1638 dim = isl_space_cow(dim);
1639 if (!dim)
1640 return NULL;
1641
1642 dim->n_out += dim->n_in;
1643 dim->n_in = 0;
1644 dim = isl_space_reset(dim, isl_dim_in);
1645 dim = isl_space_reset(dim, isl_dim_out);
1646
1647 return dim;
1648 }
1649
1650 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1651 unsigned n_div)
1652 {
1653 int i;
1654
1655 if (!dim)
1656 return NULL;
1657 if (n_div == 0 &&
1658 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1659 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1660 dim = isl_space_cow(dim);
1661 if (!dim)
1662 return NULL;
1663 dim->n_out += dim->nparam + dim->n_in + n_div;
1664 dim->nparam = 0;
1665 dim->n_in = 0;
1666
1667 for (i = 0; i < dim->n_id; ++i)
1668 isl_id_free(get_id(dim, isl_dim_out, i));
1669 dim->n_id = 0;
1670 dim = isl_space_reset(dim, isl_dim_in);
1671 dim = isl_space_reset(dim, isl_dim_out);
1672
1673 return dim;
1674 }
1675
1676 /* Are the two spaces the same, including positions and names of parameters?
1677 */
1678 int isl_space_is_equal(__isl_keep isl_space *dim1, __isl_keep isl_space *dim2)
1679 {
1680 if (!dim1 || !dim2)
1681 return -1;
1682 if (dim1 == dim2)
1683 return 1;
1684 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1685 isl_space_tuple_match(dim1, isl_dim_in, dim2, isl_dim_in) &&
1686 isl_space_tuple_match(dim1, isl_dim_out, dim2, isl_dim_out);
1687 }
1688
1689 /* Is space1 equal to the domain of space2?
1690 *
1691 * In the internal version we also allow space2 to be the space of a set,
1692 * provided space1 is a parameter space.
1693 */
1694 int isl_space_is_domain_internal(__isl_keep isl_space *space1,
1695 __isl_keep isl_space *space2)
1696 {
1697 if (!space1 || !space2)
1698 return -1;
1699 if (!isl_space_is_set(space1))
1700 return 0;
1701 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1702 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_in);
1703 }
1704
1705 /* Is space1 equal to the domain of space2?
1706 */
1707 int isl_space_is_domain(__isl_keep isl_space *space1,
1708 __isl_keep isl_space *space2)
1709 {
1710 if (!space2)
1711 return -1;
1712 if (!isl_space_is_map(space2))
1713 return 0;
1714 return isl_space_is_domain_internal(space1, space2);
1715 }
1716
1717 /* Is space1 equal to the range of space2?
1718 *
1719 * In the internal version, space2 is allowed to be the space of a set,
1720 * in which case it should be equal to space1.
1721 */
1722 int isl_space_is_range_internal(__isl_keep isl_space *space1,
1723 __isl_keep isl_space *space2)
1724 {
1725 if (!space1 || !space2)
1726 return -1;
1727 if (!isl_space_is_set(space1))
1728 return 0;
1729 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1730 isl_space_tuple_match(space1, isl_dim_set, space2, isl_dim_out);
1731 }
1732
1733 /* Is space1 equal to the range of space2?
1734 */
1735 int isl_space_is_range(__isl_keep isl_space *space1,
1736 __isl_keep isl_space *space2)
1737 {
1738 if (!space2)
1739 return -1;
1740 if (!isl_space_is_map(space2))
1741 return 0;
1742 return isl_space_is_range_internal(space1, space2);
1743 }
1744
1745 int isl_space_compatible(__isl_keep isl_space *dim1,
1746 __isl_keep isl_space *dim2)
1747 {
1748 return dim1->nparam == dim2->nparam &&
1749 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1750 }
1751
1752 static uint32_t isl_hash_dim(uint32_t hash, __isl_keep isl_space *dim)
1753 {
1754 int i;
1755 isl_id *id;
1756
1757 if (!dim)
1758 return hash;
1759
1760 isl_hash_byte(hash, dim->nparam % 256);
1761 isl_hash_byte(hash, dim->n_in % 256);
1762 isl_hash_byte(hash, dim->n_out % 256);
1763
1764 for (i = 0; i < dim->nparam; ++i) {
1765 id = get_id(dim, isl_dim_param, i);
1766 hash = isl_hash_id(hash, id);
1767 }
1768
1769 id = tuple_id(dim, isl_dim_in);
1770 hash = isl_hash_id(hash, id);
1771 id = tuple_id(dim, isl_dim_out);
1772 hash = isl_hash_id(hash, id);
1773
1774 hash = isl_hash_dim(hash, dim->nested[0]);
1775 hash = isl_hash_dim(hash, dim->nested[1]);
1776
1777 return hash;
1778 }
1779
1780 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1781 {
1782 uint32_t hash;
1783
1784 if (!dim)
1785 return 0;
1786
1787 hash = isl_hash_init();
1788 hash = isl_hash_dim(hash, dim);
1789
1790 return hash;
1791 }
1792
1793 int isl_space_is_wrapping(__isl_keep isl_space *dim)
1794 {
1795 if (!dim)
1796 return -1;
1797
1798 if (!isl_space_is_set(dim))
1799 return 0;
1800
1801 return dim->nested[1] != NULL;
1802 }
1803
1804 /* Is "space" the space of a map where the domain is a wrapped map space?
1805 */
1806 int isl_space_domain_is_wrapping(__isl_keep isl_space *space)
1807 {
1808 if (!space)
1809 return -1;
1810
1811 if (isl_space_is_set(space))
1812 return 0;
1813
1814 return space->nested[0] != NULL;
1815 }
1816
1817 /* Is "space" the space of a map where the range is a wrapped map space?
1818 */
1819 int isl_space_range_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[1] != NULL;
1828 }
1829
1830 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
1831 {
1832 isl_space *wrap;
1833
1834 if (!dim)
1835 return NULL;
1836
1837 wrap = isl_space_set_alloc(dim->ctx,
1838 dim->nparam, dim->n_in + dim->n_out);
1839
1840 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
1841 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
1842 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
1843
1844 if (!wrap)
1845 goto error;
1846
1847 wrap->nested[1] = dim;
1848
1849 return wrap;
1850 error:
1851 isl_space_free(dim);
1852 return NULL;
1853 }
1854
1855 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
1856 {
1857 isl_space *unwrap;
1858
1859 if (!dim)
1860 return NULL;
1861
1862 if (!isl_space_is_wrapping(dim))
1863 isl_die(dim->ctx, isl_error_invalid, "not a wrapping space",
1864 goto error);
1865
1866 unwrap = isl_space_copy(dim->nested[1]);
1867 isl_space_free(dim);
1868
1869 return unwrap;
1870 error:
1871 isl_space_free(dim);
1872 return NULL;
1873 }
1874
1875 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
1876 {
1877 if (type != isl_dim_in && type != isl_dim_out)
1878 return 0;
1879 if (!dim)
1880 return -1;
1881 if (dim->tuple_id[type - isl_dim_in])
1882 return 1;
1883 if (dim->nested[type - isl_dim_in])
1884 return 1;
1885 return 0;
1886 }
1887
1888 int isl_space_may_be_set(__isl_keep isl_space *dim)
1889 {
1890 if (!dim)
1891 return -1;
1892 if (isl_space_is_set(dim))
1893 return 1;
1894 if (isl_space_dim(dim, isl_dim_in) != 0)
1895 return 0;
1896 if (isl_space_is_named_or_nested(dim, isl_dim_in))
1897 return 0;
1898 return 1;
1899 }
1900
1901 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
1902 enum isl_dim_type type)
1903 {
1904 if (!isl_space_is_named_or_nested(dim, type))
1905 return dim;
1906
1907 dim = isl_space_cow(dim);
1908 if (!dim)
1909 return NULL;
1910
1911 isl_id_free(dim->tuple_id[type - isl_dim_in]);
1912 dim->tuple_id[type - isl_dim_in] = NULL;
1913 isl_space_free(dim->nested[type - isl_dim_in]);
1914 dim->nested[type - isl_dim_in] = NULL;
1915
1916 return dim;
1917 }
1918
1919 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
1920 {
1921 if (!dim)
1922 return NULL;
1923 if (!dim->nested[0] && !dim->nested[1])
1924 return dim;
1925
1926 if (dim->nested[0])
1927 dim = isl_space_reset(dim, isl_dim_in);
1928 if (dim && dim->nested[1])
1929 dim = isl_space_reset(dim, isl_dim_out);
1930
1931 return dim;
1932 }
1933
1934 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
1935 {
1936 if (!dim)
1937 return NULL;
1938 if (!dim->nested[0])
1939 return dim;
1940
1941 return isl_space_reset(dim, isl_dim_in);
1942 }
1943
1944 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
1945 {
1946 if (!dim)
1947 return NULL;
1948 if (!dim->nested[1])
1949 return dim;
1950
1951 return isl_space_reset(dim, isl_dim_out);
1952 }
1953
1954 /* Replace the dimensions of the given type of dst by those of src.
1955 */
1956 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
1957 enum isl_dim_type type, __isl_keep isl_space *src)
1958 {
1959 dst = isl_space_cow(dst);
1960
1961 if (!dst || !src)
1962 goto error;
1963
1964 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
1965 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
1966 dst = copy_ids(dst, type, 0, src, type);
1967
1968 if (dst && type == isl_dim_param) {
1969 int i;
1970 for (i = 0; i <= 1; ++i) {
1971 if (!dst->nested[i])
1972 continue;
1973 dst->nested[i] = isl_space_replace(dst->nested[i],
1974 type, src);
1975 if (!dst->nested[i])
1976 goto error;
1977 }
1978 }
1979
1980 return dst;
1981 error:
1982 isl_space_free(dst);
1983 return NULL;
1984 }
1985
1986 /* Given a dimension specification "dim" of a set, create a dimension
1987 * specification for the lift of the set. In particular, the result
1988 * is of the form [dim -> local[..]], with n_local variables in the
1989 * range of the wrapped map.
1990 */
1991 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
1992 {
1993 isl_space *local_dim;
1994
1995 if (!dim)
1996 return NULL;
1997
1998 local_dim = isl_space_dup(dim);
1999 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
2000 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
2001 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
2002 dim = isl_space_join(isl_space_from_domain(dim),
2003 isl_space_from_range(local_dim));
2004 dim = isl_space_wrap(dim);
2005 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
2006
2007 return dim;
2008 }
2009
2010 int isl_space_can_zip(__isl_keep isl_space *dim)
2011 {
2012 if (!dim)
2013 return -1;
2014
2015 return dim->nested[0] && dim->nested[1];
2016 }
2017
2018 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
2019 {
2020 isl_space *dom, *ran;
2021 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
2022
2023 if (!isl_space_can_zip(dim))
2024 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
2025 goto error);
2026
2027 if (!dim)
2028 return NULL;
2029 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
2030 ran = isl_space_unwrap(isl_space_range(dim));
2031 dom_dom = isl_space_domain(isl_space_copy(dom));
2032 dom_ran = isl_space_range(dom);
2033 ran_dom = isl_space_domain(isl_space_copy(ran));
2034 ran_ran = isl_space_range(ran);
2035 dom = isl_space_join(isl_space_from_domain(dom_dom),
2036 isl_space_from_range(ran_dom));
2037 ran = isl_space_join(isl_space_from_domain(dom_ran),
2038 isl_space_from_range(ran_ran));
2039 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2040 isl_space_from_range(isl_space_wrap(ran)));
2041 error:
2042 isl_space_free(dim);
2043 return NULL;
2044 }
2045
2046 /* Can we apply isl_space_curry to "space"?
2047 * That is, does it have a nested relation in its domain?
2048 */
2049 int isl_space_can_curry(__isl_keep isl_space *space)
2050 {
2051 if (!space)
2052 return -1;
2053
2054 return !!space->nested[0];
2055 }
2056
2057 /* Given a space (A -> B) -> C, return the corresponding space
2058 * A -> (B -> C).
2059 */
2060 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
2061 {
2062 isl_space *dom, *ran;
2063 isl_space *dom_dom, *dom_ran;
2064
2065 if (!space)
2066 return NULL;
2067
2068 if (!isl_space_can_curry(space))
2069 isl_die(space->ctx, isl_error_invalid,
2070 "space cannot be curried", goto error);
2071
2072 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
2073 ran = isl_space_range(space);
2074 dom_dom = isl_space_domain(isl_space_copy(dom));
2075 dom_ran = isl_space_range(dom);
2076 ran = isl_space_join(isl_space_from_domain(dom_ran),
2077 isl_space_from_range(ran));
2078 return isl_space_join(isl_space_from_domain(dom_dom),
2079 isl_space_from_range(isl_space_wrap(ran)));
2080 error:
2081 isl_space_free(space);
2082 return NULL;
2083 }
2084
2085 /* Can we apply isl_space_uncurry to "space"?
2086 * That is, does it have a nested relation in its range?
2087 */
2088 int isl_space_can_uncurry(__isl_keep isl_space *space)
2089 {
2090 if (!space)
2091 return -1;
2092
2093 return !!space->nested[1];
2094 }
2095
2096 /* Given a space A -> (B -> C), return the corresponding space
2097 * (A -> B) -> C.
2098 */
2099 __isl_give isl_space *isl_space_uncurry(__isl_take isl_space *space)
2100 {
2101 isl_space *dom, *ran;
2102 isl_space *ran_dom, *ran_ran;
2103
2104 if (!space)
2105 return NULL;
2106
2107 if (!isl_space_can_uncurry(space))
2108 isl_die(space->ctx, isl_error_invalid,
2109 "space cannot be uncurried",
2110 return isl_space_free(space));
2111
2112 dom = isl_space_domain(isl_space_copy(space));
2113 ran = isl_space_unwrap(isl_space_range(space));
2114 ran_dom = isl_space_domain(isl_space_copy(ran));
2115 ran_ran = isl_space_range(ran);
2116 dom = isl_space_join(isl_space_from_domain(dom),
2117 isl_space_from_range(ran_dom));
2118 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2119 isl_space_from_range(ran_ran));
2120 }
2121
2122 int isl_space_has_named_params(__isl_keep isl_space *dim)
2123 {
2124 int i;
2125 unsigned off;
2126
2127 if (!dim)
2128 return -1;
2129 if (dim->nparam == 0)
2130 return 1;
2131 off = isl_space_offset(dim, isl_dim_param);
2132 if (off + dim->nparam > dim->n_id)
2133 return 0;
2134 for (i = 0; i < dim->nparam; ++i)
2135 if (!dim->ids[off + i])
2136 return 0;
2137 return 1;
2138 }
2139
2140 /* Align the initial parameters of dim1 to match the order in dim2.
2141 */
2142 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
2143 __isl_take isl_space *dim2)
2144 {
2145 isl_reordering *exp;
2146
2147 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
2148 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
2149 "parameter alignment requires named parameters",
2150 goto error);
2151
2152 dim2 = isl_space_params(dim2);
2153 exp = isl_parameter_alignment_reordering(dim1, dim2);
2154 exp = isl_reordering_extend_space(exp, dim1);
2155 isl_space_free(dim2);
2156 if (!exp)
2157 return NULL;
2158 dim1 = isl_space_copy(exp->dim);
2159 isl_reordering_free(exp);
2160 return dim1;
2161 error:
2162 isl_space_free(dim1);
2163 isl_space_free(dim2);
2164 return NULL;
2165 }
2166
2167 /* Given the space of set (domain), construct a space for a map
2168 * with as domain the given space and as range the range of "model".
2169 */
2170 __isl_give isl_space *isl_space_extend_domain_with_range(
2171 __isl_take isl_space *space, __isl_take isl_space *model)
2172 {
2173 if (!model)
2174 goto error;
2175
2176 space = isl_space_from_domain(space);
2177 space = isl_space_add_dims(space, isl_dim_out,
2178 isl_space_dim(model, isl_dim_out));
2179 if (isl_space_has_tuple_id(model, isl_dim_out))
2180 space = isl_space_set_tuple_id(space, isl_dim_out,
2181 isl_space_get_tuple_id(model, isl_dim_out));
2182 if (!space)
2183 goto error;
2184 if (model->nested[1]) {
2185 isl_space *nested = isl_space_copy(model->nested[1]);
2186 int n_nested, n_space;
2187 nested = isl_space_align_params(nested, isl_space_copy(space));
2188 n_nested = isl_space_dim(nested, isl_dim_param);
2189 n_space = isl_space_dim(space, isl_dim_param);
2190 if (n_nested > n_space)
2191 nested = isl_space_drop_dims(nested, isl_dim_param,
2192 n_space, n_nested - n_space);
2193 if (!nested)
2194 goto error;
2195 space->nested[1] = nested;
2196 }
2197 isl_space_free(model);
2198 return space;
2199 error:
2200 isl_space_free(model);
2201 isl_space_free(space);
2202 return NULL;
2203 }
2204
2205 /* Compare the "type" dimensions of two isl_spaces.
2206 *
2207 * The order is fairly arbitrary.
2208 */
2209 static int isl_space_cmp_type(__isl_keep isl_space *space1,
2210 __isl_keep isl_space *space2, enum isl_dim_type type)
2211 {
2212 int cmp;
2213 isl_space *nested1, *nested2;
2214
2215 if (isl_space_dim(space1, type) != isl_space_dim(space2, type))
2216 return isl_space_dim(space1, type) -
2217 isl_space_dim(space2, type);
2218
2219 cmp = isl_id_cmp(tuple_id(space1, type), tuple_id(space2, type));
2220 if (cmp != 0)
2221 return cmp;
2222
2223 nested1 = nested(space1, type);
2224 nested2 = nested(space2, type);
2225 if (!nested1 != !nested2)
2226 return !nested1 - !nested2;
2227
2228 if (nested1)
2229 return isl_space_cmp(nested1, nested2);
2230
2231 return 0;
2232 }
2233
2234 /* Compare two isl_spaces.
2235 *
2236 * The order is fairly arbitrary.
2237 */
2238 int isl_space_cmp(__isl_keep isl_space *space1, __isl_keep isl_space *space2)
2239 {
2240 int i;
2241 int cmp;
2242
2243 if (space1 == space2)
2244 return 0;
2245 if (!space1)
2246 return -1;
2247 if (!space2)
2248 return 1;
2249
2250 cmp = isl_space_cmp_type(space1, space2, isl_dim_param);
2251 if (cmp != 0)
2252 return cmp;
2253 cmp = isl_space_cmp_type(space1, space2, isl_dim_in);
2254 if (cmp != 0)
2255 return cmp;
2256 cmp = isl_space_cmp_type(space1, space2, isl_dim_out);
2257 if (cmp != 0)
2258 return cmp;
2259
2260 if (!space1->ids && !space2->ids)
2261 return 0;
2262
2263 for (i = 0; i < n(space1, isl_dim_param); ++i) {
2264 cmp = isl_id_cmp(get_id(space1, isl_dim_param, i),
2265 get_id(space2, isl_dim_param, i));
2266 if (cmp != 0)
2267 return cmp;
2268 }
2269
2270 return 0;
2271 }
Integer set library