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extract out shared isl_map_has_equal_params
[isl.git] / isl_space.c
blobaf418f8b6e8a12da06aebed346ab2e6fceb2bbfe
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 isl_bool isl_space_is_set(__isl_keep isl_space *space)
69 {
70 if (!space)
71 return isl_bool_error;
72 if (space->n_in != 0 || space->nested[0])
73 return isl_bool_false;
74 if (space->tuple_id[0] != &isl_id_none)
75 return isl_bool_false;
76 return isl_bool_true;
77 }
78
79 /* Is the given space that of a map?
80 */
81 isl_bool isl_space_is_map(__isl_keep isl_space *space)
82 {
83 if (!space)
84 return isl_bool_error;
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 isl_bool isl_space_is_params(__isl_keep isl_space *space)
113 {
114 if (!space)
115 return isl_bool_error;
116 if (space->n_in != 0 || space->nested[0] ||
117 space->n_out != 0 || space->nested[1])
118 return isl_bool_false;
119 if (space->tuple_id[0] != &isl_id_none)
120 return isl_bool_false;
121 if (space->tuple_id[1] != &isl_id_none)
122 return isl_bool_false;
123 return isl_bool_true;
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 isl_bool isl_space_has_tuple_id(__isl_keep isl_space *dim,
409 enum isl_dim_type type)
410 {
411 if (!space_can_have_id(dim, type))
412 return isl_bool_error;
413 return dim->tuple_id[type - isl_dim_in] != NULL;
414 }
415
416 __isl_give isl_id *isl_space_get_tuple_id(__isl_keep isl_space *dim,
417 enum isl_dim_type type)
418 {
419 int has_id;
420
421 if (!dim)
422 return NULL;
423 has_id = isl_space_has_tuple_id(dim, type);
424 if (has_id < 0)
425 return NULL;
426 if (!has_id)
427 isl_die(dim->ctx, isl_error_invalid,
428 "tuple has no id", return NULL);
429 return isl_id_copy(dim->tuple_id[type - isl_dim_in]);
430 }
431
432 __isl_give isl_space *isl_space_set_tuple_id(__isl_take isl_space *dim,
433 enum isl_dim_type type, __isl_take isl_id *id)
434 {
435 dim = isl_space_cow(dim);
436 if (!dim || !id)
437 goto error;
438 if (type != isl_dim_in && type != isl_dim_out)
439 isl_die(dim->ctx, isl_error_invalid,
440 "only input, output and set tuples can have names",
441 goto error);
442
443 isl_id_free(dim->tuple_id[type - isl_dim_in]);
444 dim->tuple_id[type - isl_dim_in] = id;
445
446 return dim;
447 error:
448 isl_id_free(id);
449 isl_space_free(dim);
450 return NULL;
451 }
452
453 __isl_give isl_space *isl_space_reset_tuple_id(__isl_take isl_space *dim,
454 enum isl_dim_type type)
455 {
456 dim = isl_space_cow(dim);
457 if (!dim)
458 return NULL;
459 if (type != isl_dim_in && type != isl_dim_out)
460 isl_die(dim->ctx, isl_error_invalid,
461 "only input, output and set tuples can have names",
462 goto error);
463
464 isl_id_free(dim->tuple_id[type - isl_dim_in]);
465 dim->tuple_id[type - isl_dim_in] = NULL;
466
467 return dim;
468 error:
469 isl_space_free(dim);
470 return NULL;
471 }
472
473 /* Set the id of the given dimension of "space" to "id".
474 * If the dimension already has an id, then it is replaced.
475 * If the dimension is a parameter, then we need to change it
476 * in the nested spaces (if any) as well.
477 */
478 __isl_give isl_space *isl_space_set_dim_id(__isl_take isl_space *space,
479 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
480 {
481 space = isl_space_cow(space);
482 if (!space || !id)
483 goto error;
484
485 if (type == isl_dim_param) {
486 int i;
487
488 for (i = 0; i < 2; ++i) {
489 if (!space->nested[i])
490 continue;
491 space->nested[i] =
492 isl_space_set_dim_id(space->nested[i],
493 type, pos, isl_id_copy(id));
494 if (!space->nested[i])
495 goto error;
496 }
497 }
498
499 isl_id_free(get_id(space, type, pos));
500 return set_id(space, type, pos, id);
501 error:
502 isl_id_free(id);
503 isl_space_free(space);
504 return NULL;
505 }
506
507 /* Reset the id of the given dimension of "space".
508 * If the dimension already has an id, then it is removed.
509 * If the dimension is a parameter, then we need to reset it
510 * in the nested spaces (if any) as well.
511 */
512 __isl_give isl_space *isl_space_reset_dim_id(__isl_take isl_space *space,
513 enum isl_dim_type type, unsigned pos)
514 {
515 space = isl_space_cow(space);
516 if (!space)
517 goto error;
518
519 if (type == isl_dim_param) {
520 int i;
521
522 for (i = 0; i < 2; ++i) {
523 if (!space->nested[i])
524 continue;
525 space->nested[i] =
526 isl_space_reset_dim_id(space->nested[i],
527 type, pos);
528 if (!space->nested[i])
529 goto error;
530 }
531 }
532
533 isl_id_free(get_id(space, type, pos));
534 return set_id(space, type, pos, NULL);
535 error:
536 isl_space_free(space);
537 return NULL;
538 }
539
540 isl_bool isl_space_has_dim_id(__isl_keep isl_space *dim,
541 enum isl_dim_type type, unsigned pos)
542 {
543 if (!dim)
544 return isl_bool_error;
545 return get_id(dim, type, pos) != NULL;
546 }
547
548 __isl_give isl_id *isl_space_get_dim_id(__isl_keep isl_space *dim,
549 enum isl_dim_type type, unsigned pos)
550 {
551 if (!dim)
552 return NULL;
553 if (!get_id(dim, type, pos))
554 isl_die(dim->ctx, isl_error_invalid,
555 "dim has no id", return NULL);
556 return isl_id_copy(get_id(dim, type, pos));
557 }
558
559 __isl_give isl_space *isl_space_set_tuple_name(__isl_take isl_space *dim,
560 enum isl_dim_type type, const char *s)
561 {
562 isl_id *id;
563
564 if (!dim)
565 return NULL;
566
567 if (!s)
568 return isl_space_reset_tuple_id(dim, type);
569
570 if (!name_ok(dim->ctx, s))
571 goto error;
572
573 id = isl_id_alloc(dim->ctx, s, NULL);
574 return isl_space_set_tuple_id(dim, type, id);
575 error:
576 isl_space_free(dim);
577 return NULL;
578 }
579
580 /* Does the tuple have a name?
581 */
582 isl_bool isl_space_has_tuple_name(__isl_keep isl_space *space,
583 enum isl_dim_type type)
584 {
585 isl_id *id;
586
587 if (!space_can_have_id(space, type))
588 return isl_bool_error;
589 id = space->tuple_id[type - isl_dim_in];
590 return id && id->name;
591 }
592
593 const char *isl_space_get_tuple_name(__isl_keep isl_space *dim,
594 enum isl_dim_type type)
595 {
596 isl_id *id;
597 if (!dim)
598 return NULL;
599 if (type != isl_dim_in && type != isl_dim_out)
600 return NULL;
601 id = dim->tuple_id[type - isl_dim_in];
602 return id ? id->name : NULL;
603 }
604
605 __isl_give isl_space *isl_space_set_dim_name(__isl_take isl_space *dim,
606 enum isl_dim_type type, unsigned pos,
607 const char *s)
608 {
609 isl_id *id;
610
611 if (!dim)
612 return NULL;
613 if (!s)
614 return isl_space_reset_dim_id(dim, type, pos);
615 if (!name_ok(dim->ctx, s))
616 goto error;
617 id = isl_id_alloc(dim->ctx, s, NULL);
618 return isl_space_set_dim_id(dim, type, pos, id);
619 error:
620 isl_space_free(dim);
621 return NULL;
622 }
623
624 /* Does the given dimension have a name?
625 */
626 isl_bool isl_space_has_dim_name(__isl_keep isl_space *space,
627 enum isl_dim_type type, unsigned pos)
628 {
629 isl_id *id;
630
631 if (!space)
632 return isl_bool_error;
633 id = get_id(space, type, pos);
634 return id && id->name;
635 }
636
637 __isl_keep const char *isl_space_get_dim_name(__isl_keep isl_space *dim,
638 enum isl_dim_type type, unsigned pos)
639 {
640 isl_id *id = get_id(dim, type, pos);
641 return id ? id->name : NULL;
642 }
643
644 int isl_space_find_dim_by_id(__isl_keep isl_space *dim, enum isl_dim_type type,
645 __isl_keep isl_id *id)
646 {
647 int i;
648 int offset;
649 int n;
650
651 if (!dim || !id)
652 return -1;
653
654 offset = isl_space_offset(dim, type);
655 n = isl_space_dim(dim, type);
656 for (i = 0; i < n && offset + i < dim->n_id; ++i)
657 if (dim->ids[offset + i] == id)
658 return i;
659
660 return -1;
661 }
662
663 int isl_space_find_dim_by_name(__isl_keep isl_space *space,
664 enum isl_dim_type type, const char *name)
665 {
666 int i;
667 int offset;
668 int n;
669
670 if (!space || !name)
671 return -1;
672
673 offset = isl_space_offset(space, type);
674 n = isl_space_dim(space, type);
675 for (i = 0; i < n && offset + i < space->n_id; ++i) {
676 isl_id *id = get_id(space, type, i);
677 if (id && id->name && !strcmp(id->name, name))
678 return i;
679 }
680
681 return -1;
682 }
683
684 /* Reset the user pointer on all identifiers of parameters and tuples
685 * of "space".
686 */
687 __isl_give isl_space *isl_space_reset_user(__isl_take isl_space *space)
688 {
689 int i;
690 isl_ctx *ctx;
691 isl_id *id;
692 const char *name;
693
694 if (!space)
695 return NULL;
696
697 ctx = isl_space_get_ctx(space);
698
699 for (i = 0; i < space->nparam && i < space->n_id; ++i) {
700 if (!isl_id_get_user(space->ids[i]))
701 continue;
702 space = isl_space_cow(space);
703 if (!space)
704 return NULL;
705 name = isl_id_get_name(space->ids[i]);
706 id = isl_id_alloc(ctx, name, NULL);
707 isl_id_free(space->ids[i]);
708 space->ids[i] = id;
709 if (!id)
710 return isl_space_free(space);
711 }
712
713 for (i = 0; i < 2; ++i) {
714 if (!space->tuple_id[i])
715 continue;
716 if (!isl_id_get_user(space->tuple_id[i]))
717 continue;
718 space = isl_space_cow(space);
719 if (!space)
720 return NULL;
721 name = isl_id_get_name(space->tuple_id[i]);
722 id = isl_id_alloc(ctx, name, NULL);
723 isl_id_free(space->tuple_id[i]);
724 space->tuple_id[i] = id;
725 if (!id)
726 return isl_space_free(space);
727 }
728
729 for (i = 0; i < 2; ++i) {
730 if (!space->nested[i])
731 continue;
732 space = isl_space_cow(space);
733 if (!space)
734 return NULL;
735 space->nested[i] = isl_space_reset_user(space->nested[i]);
736 if (!space->nested[i])
737 return isl_space_free(space);
738 }
739
740 return space;
741 }
742
743 static __isl_keep isl_id *tuple_id(__isl_keep isl_space *dim,
744 enum isl_dim_type type)
745 {
746 if (!dim)
747 return NULL;
748 if (type == isl_dim_in)
749 return dim->tuple_id[0];
750 if (type == isl_dim_out)
751 return dim->tuple_id[1];
752 return NULL;
753 }
754
755 static __isl_keep isl_space *nested(__isl_keep isl_space *dim,
756 enum isl_dim_type type)
757 {
758 if (!dim)
759 return NULL;
760 if (type == isl_dim_in)
761 return dim->nested[0];
762 if (type == isl_dim_out)
763 return dim->nested[1];
764 return NULL;
765 }
766
767 /* Are the two spaces the same, apart from positions and names of parameters?
768 */
769 isl_bool isl_space_has_equal_tuples(__isl_keep isl_space *space1,
770 __isl_keep isl_space *space2)
771 {
772 if (!space1 || !space2)
773 return isl_bool_error;
774 if (space1 == space2)
775 return isl_bool_true;
776 return isl_space_tuple_is_equal(space1, isl_dim_in,
777 space2, isl_dim_in) &&
778 isl_space_tuple_is_equal(space1, isl_dim_out,
779 space2, isl_dim_out);
780 }
781
782 /* Check if the tuple of type "type1" of "space1" is the same as
783 * the tuple of type "type2" of "space2".
784 *
785 * That is, check if the tuples have the same identifier, the same dimension
786 * and the same internal structure.
787 * The identifiers of the dimensions inside the tuples do not affect the result.
788 *
789 * Note that this function only checks the tuples themselves.
790 * If nested tuples are involved, then we need to be careful not
791 * to have result affected by possibly differing parameters
792 * in those nested tuples.
793 */
794 isl_bool isl_space_tuple_is_equal(__isl_keep isl_space *space1,
795 enum isl_dim_type type1, __isl_keep isl_space *space2,
796 enum isl_dim_type type2)
797 {
798 isl_id *id1, *id2;
799 isl_space *nested1, *nested2;
800
801 if (!space1 || !space2)
802 return isl_bool_error;
803
804 if (space1 == space2 && type1 == type2)
805 return isl_bool_true;
806
807 if (n(space1, type1) != n(space2, type2))
808 return isl_bool_false;
809 id1 = tuple_id(space1, type1);
810 id2 = tuple_id(space2, type2);
811 if (!id1 ^ !id2)
812 return isl_bool_false;
813 if (id1 && id1 != id2)
814 return isl_bool_false;
815 nested1 = nested(space1, type1);
816 nested2 = nested(space2, type2);
817 if (!nested1 ^ !nested2)
818 return isl_bool_false;
819 if (nested1 && !isl_space_has_equal_tuples(nested1, nested2))
820 return isl_bool_false;
821 return isl_bool_true;
822 }
823
824 /* This is the old, undocumented, name for isl_space_tuple_is_equal.
825 * It will be removed at some point.
826 */
827 int isl_space_tuple_match(__isl_keep isl_space *space1, enum isl_dim_type type1,
828 __isl_keep isl_space *space2, enum isl_dim_type type2)
829 {
830 return isl_space_tuple_is_equal(space1, type1, space2, type2);
831 }
832
833 static isl_bool match(__isl_keep isl_space *space1, enum isl_dim_type type1,
834 __isl_keep isl_space *space2, enum isl_dim_type type2)
835 {
836 int i;
837
838 if (space1 == space2 && type1 == type2)
839 return isl_bool_true;
840
841 if (!isl_space_tuple_is_equal(space1, type1, space2, type2))
842 return isl_bool_false;
843
844 if (!space1->ids && !space2->ids)
845 return isl_bool_true;
846
847 for (i = 0; i < n(space1, type1); ++i) {
848 if (get_id(space1, type1, i) != get_id(space2, type2, i))
849 return isl_bool_false;
850 }
851 return isl_bool_true;
852 }
853
854 isl_bool isl_space_match(__isl_keep isl_space *space1, enum isl_dim_type type1,
855 __isl_keep isl_space *space2, enum isl_dim_type type2)
856 {
857 if (!space1 || !space2)
858 return isl_bool_error;
859
860 return match(space1, type1, space2, type2);
861 }
862
863 static void get_ids(__isl_keep isl_space *dim, enum isl_dim_type type,
864 unsigned first, unsigned n, __isl_keep isl_id **ids)
865 {
866 int i;
867
868 for (i = 0; i < n ; ++i)
869 ids[i] = get_id(dim, type, first + i);
870 }
871
872 static __isl_give isl_space *space_extend(__isl_take isl_space *space,
873 unsigned nparam, unsigned n_in, unsigned n_out)
874 {
875 isl_id **ids = NULL;
876
877 if (!space)
878 return NULL;
879 if (space->nparam == nparam &&
880 space->n_in == n_in && space->n_out == n_out)
881 return space;
882
883 isl_assert(space->ctx, space->nparam <= nparam, goto error);
884 isl_assert(space->ctx, space->n_in <= n_in, goto error);
885 isl_assert(space->ctx, space->n_out <= n_out, goto error);
886
887 space = isl_space_cow(space);
888 if (!space)
889 goto error;
890
891 if (space->ids) {
892 unsigned n;
893 n = nparam + n_in + n_out;
894 if (n < nparam || n < n_in || n < n_out)
895 isl_die(isl_space_get_ctx(space), isl_error_invalid,
896 "overflow in total number of dimensions",
897 goto error);
898 ids = isl_calloc_array(space->ctx, isl_id *, n);
899 if (!ids)
900 goto error;
901 get_ids(space, isl_dim_param, 0, space->nparam, ids);
902 get_ids(space, isl_dim_in, 0, space->n_in, ids + nparam);
903 get_ids(space, isl_dim_out, 0, space->n_out,
904 ids + nparam + n_in);
905 free(space->ids);
906 space->ids = ids;
907 space->n_id = nparam + n_in + n_out;
908 }
909 space->nparam = nparam;
910 space->n_in = n_in;
911 space->n_out = n_out;
912
913 return space;
914 error:
915 free(ids);
916 isl_space_free(space);
917 return NULL;
918 }
919
920 __isl_give isl_space *isl_space_extend(__isl_take isl_space *space,
921 unsigned nparam, unsigned n_in, unsigned n_out)
922 {
923 return space_extend(space, nparam, n_in, n_out);
924 }
925
926 __isl_give isl_space *isl_space_add_dims(__isl_take isl_space *space,
927 enum isl_dim_type type, unsigned n)
928 {
929 space = isl_space_reset(space, type);
930 if (!space)
931 return NULL;
932 switch (type) {
933 case isl_dim_param:
934 space = space_extend(space,
935 space->nparam + n, space->n_in, space->n_out);
936 if (space && space->nested[0] &&
937 !(space->nested[0] = isl_space_add_dims(space->nested[0],
938 isl_dim_param, n)))
939 goto error;
940 if (space && space->nested[1] &&
941 !(space->nested[1] = isl_space_add_dims(space->nested[1],
942 isl_dim_param, n)))
943 goto error;
944 return space;
945 case isl_dim_in:
946 return space_extend(space,
947 space->nparam, space->n_in + n, space->n_out);
948 case isl_dim_out:
949 return space_extend(space,
950 space->nparam, space->n_in, space->n_out + n);
951 default:
952 isl_die(space->ctx, isl_error_invalid,
953 "cannot add dimensions of specified type", goto error);
954 }
955 error:
956 isl_space_free(space);
957 return NULL;
958 }
959
960 static int valid_dim_type(enum isl_dim_type type)
961 {
962 switch (type) {
963 case isl_dim_param:
964 case isl_dim_in:
965 case isl_dim_out:
966 return 1;
967 default:
968 return 0;
969 }
970 }
971
972 /* Insert "n" dimensions of type "type" at position "pos".
973 * If we are inserting parameters, then they are also inserted in
974 * any nested spaces.
975 */
976 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
977 enum isl_dim_type type, unsigned pos, unsigned n)
978 {
979 isl_id **ids = NULL;
980
981 if (!dim)
982 return NULL;
983 if (n == 0)
984 return isl_space_reset(dim, type);
985
986 if (!valid_dim_type(type))
987 isl_die(dim->ctx, isl_error_invalid,
988 "cannot insert dimensions of specified type",
989 goto error);
990
991 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
992
993 dim = isl_space_cow(dim);
994 if (!dim)
995 return NULL;
996
997 if (dim->ids) {
998 enum isl_dim_type t, o = isl_dim_param;
999 int off;
1000 int s[3];
1001 ids = isl_calloc_array(dim->ctx, isl_id *,
1002 dim->nparam + dim->n_in + dim->n_out + n);
1003 if (!ids)
1004 goto error;
1005 off = 0;
1006 s[isl_dim_param - o] = dim->nparam;
1007 s[isl_dim_in - o] = dim->n_in;
1008 s[isl_dim_out - o] = dim->n_out;
1009 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1010 if (t != type) {
1011 get_ids(dim, t, 0, s[t - o], ids + off);
1012 off += s[t - o];
1013 } else {
1014 get_ids(dim, t, 0, pos, ids + off);
1015 off += pos + n;
1016 get_ids(dim, t, pos, s[t - o] - pos, ids + off);
1017 off += s[t - o] - pos;
1018 }
1019 }
1020 free(dim->ids);
1021 dim->ids = ids;
1022 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
1023 }
1024 switch (type) {
1025 case isl_dim_param: dim->nparam += n; break;
1026 case isl_dim_in: dim->n_in += n; break;
1027 case isl_dim_out: dim->n_out += n; break;
1028 default: ;
1029 }
1030 dim = isl_space_reset(dim, type);
1031
1032 if (type == isl_dim_param) {
1033 if (dim && dim->nested[0] &&
1034 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
1035 isl_dim_param, pos, n)))
1036 goto error;
1037 if (dim && dim->nested[1] &&
1038 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
1039 isl_dim_param, pos, n)))
1040 goto error;
1041 }
1042
1043 return dim;
1044 error:
1045 isl_space_free(dim);
1046 return NULL;
1047 }
1048
1049 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *dim,
1050 enum isl_dim_type dst_type, unsigned dst_pos,
1051 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1052 {
1053 int i;
1054
1055 if (!dim)
1056 return NULL;
1057 if (n == 0) {
1058 dim = isl_space_reset(dim, src_type);
1059 return isl_space_reset(dim, dst_type);
1060 }
1061
1062 isl_assert(dim->ctx, src_pos + n <= isl_space_dim(dim, src_type),
1063 goto error);
1064
1065 if (dst_type == src_type && dst_pos == src_pos)
1066 return dim;
1067
1068 isl_assert(dim->ctx, dst_type != src_type, goto error);
1069
1070 dim = isl_space_reset(dim, src_type);
1071 dim = isl_space_reset(dim, dst_type);
1072
1073 dim = isl_space_cow(dim);
1074 if (!dim)
1075 return NULL;
1076
1077 if (dim->ids) {
1078 isl_id **ids;
1079 enum isl_dim_type t, o = isl_dim_param;
1080 int off;
1081 int s[3];
1082 ids = isl_calloc_array(dim->ctx, isl_id *,
1083 dim->nparam + dim->n_in + dim->n_out);
1084 if (!ids)
1085 goto error;
1086 off = 0;
1087 s[isl_dim_param - o] = dim->nparam;
1088 s[isl_dim_in - o] = dim->n_in;
1089 s[isl_dim_out - o] = dim->n_out;
1090 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1091 if (t == dst_type) {
1092 get_ids(dim, t, 0, dst_pos, ids + off);
1093 off += dst_pos;
1094 get_ids(dim, src_type, src_pos, n, ids + off);
1095 off += n;
1096 get_ids(dim, t, dst_pos, s[t - o] - dst_pos,
1097 ids + off);
1098 off += s[t - o] - dst_pos;
1099 } else if (t == src_type) {
1100 get_ids(dim, t, 0, src_pos, ids + off);
1101 off += src_pos;
1102 get_ids(dim, t, src_pos + n,
1103 s[t - o] - src_pos - n, ids + off);
1104 off += s[t - o] - src_pos - n;
1105 } else {
1106 get_ids(dim, t, 0, s[t - o], ids + off);
1107 off += s[t - o];
1108 }
1109 }
1110 free(dim->ids);
1111 dim->ids = ids;
1112 dim->n_id = dim->nparam + dim->n_in + dim->n_out;
1113 }
1114
1115 switch (dst_type) {
1116 case isl_dim_param: dim->nparam += n; break;
1117 case isl_dim_in: dim->n_in += n; break;
1118 case isl_dim_out: dim->n_out += n; break;
1119 default: ;
1120 }
1121
1122 switch (src_type) {
1123 case isl_dim_param: dim->nparam -= n; break;
1124 case isl_dim_in: dim->n_in -= n; break;
1125 case isl_dim_out: dim->n_out -= n; break;
1126 default: ;
1127 }
1128
1129 if (dst_type != isl_dim_param && src_type != isl_dim_param)
1130 return dim;
1131
1132 for (i = 0; i < 2; ++i) {
1133 if (!dim->nested[i])
1134 continue;
1135 dim->nested[i] = isl_space_replace(dim->nested[i],
1136 isl_dim_param, dim);
1137 if (!dim->nested[i])
1138 goto error;
1139 }
1140
1141 return dim;
1142 error:
1143 isl_space_free(dim);
1144 return NULL;
1145 }
1146
1147 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
1148 __isl_take isl_space *right)
1149 {
1150 isl_space *dim;
1151
1152 if (!left || !right)
1153 goto error;
1154
1155 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1156 goto error);
1157 isl_assert(left->ctx,
1158 isl_space_tuple_is_equal(left, isl_dim_out, right, isl_dim_in),
1159 goto error);
1160
1161 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
1162 if (!dim)
1163 goto error;
1164
1165 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
1166 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
1167 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
1168
1169 if (dim && left->tuple_id[0] &&
1170 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
1171 goto error;
1172 if (dim && right->tuple_id[1] &&
1173 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1174 goto error;
1175 if (dim && left->nested[0] &&
1176 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1177 goto error;
1178 if (dim && right->nested[1] &&
1179 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1180 goto error;
1181
1182 isl_space_free(left);
1183 isl_space_free(right);
1184
1185 return dim;
1186 error:
1187 isl_space_free(left);
1188 isl_space_free(right);
1189 return NULL;
1190 }
1191
1192 /* Given two map spaces { A -> C } and { B -> D }, construct the space
1193 * { [A -> B] -> [C -> D] }.
1194 * Given two set spaces { A } and { B }, construct the space { [A -> B] }.
1195 */
1196 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1197 __isl_take isl_space *right)
1198 {
1199 isl_space *dom1, *dom2, *nest1, *nest2;
1200 int is_set;
1201
1202 if (!left || !right)
1203 goto error;
1204
1205 is_set = isl_space_is_set(left);
1206 if (is_set != isl_space_is_set(right))
1207 isl_die(isl_space_get_ctx(left), isl_error_invalid,
1208 "expecting either two set spaces or two map spaces",
1209 goto error);
1210 if (is_set)
1211 return isl_space_range_product(left, right);
1212
1213 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1214 goto error);
1215
1216 dom1 = isl_space_domain(isl_space_copy(left));
1217 dom2 = isl_space_domain(isl_space_copy(right));
1218 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1219
1220 dom1 = isl_space_range(left);
1221 dom2 = isl_space_range(right);
1222 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1223
1224 return isl_space_join(isl_space_reverse(nest1), nest2);
1225 error:
1226 isl_space_free(left);
1227 isl_space_free(right);
1228 return NULL;
1229 }
1230
1231 /* Given two spaces { A -> C } and { B -> C }, construct the space
1232 * { [A -> B] -> C }
1233 */
1234 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1235 __isl_take isl_space *right)
1236 {
1237 isl_space *ran, *dom1, *dom2, *nest;
1238
1239 if (!left || !right)
1240 goto error;
1241
1242 if (!match(left, isl_dim_param, right, isl_dim_param))
1243 isl_die(left->ctx, isl_error_invalid,
1244 "parameters need to match", goto error);
1245 if (!isl_space_tuple_is_equal(left, isl_dim_out, right, isl_dim_out))
1246 isl_die(left->ctx, isl_error_invalid,
1247 "ranges need to match", goto error);
1248
1249 ran = isl_space_range(isl_space_copy(left));
1250
1251 dom1 = isl_space_domain(left);
1252 dom2 = isl_space_domain(right);
1253 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1254
1255 return isl_space_join(isl_space_reverse(nest), ran);
1256 error:
1257 isl_space_free(left);
1258 isl_space_free(right);
1259 return NULL;
1260 }
1261
1262 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1263 __isl_take isl_space *right)
1264 {
1265 isl_space *dom, *ran1, *ran2, *nest;
1266
1267 if (!left || !right)
1268 goto error;
1269
1270 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1271 goto error);
1272 if (!isl_space_tuple_is_equal(left, isl_dim_in, right, isl_dim_in))
1273 isl_die(left->ctx, isl_error_invalid,
1274 "domains need to match", goto error);
1275
1276 dom = isl_space_domain(isl_space_copy(left));
1277
1278 ran1 = isl_space_range(left);
1279 ran2 = isl_space_range(right);
1280 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1281
1282 return isl_space_join(isl_space_reverse(dom), nest);
1283 error:
1284 isl_space_free(left);
1285 isl_space_free(right);
1286 return NULL;
1287 }
1288
1289 /* Given a space of the form [A -> B] -> [C -> D], return the space A -> C.
1290 */
1291 __isl_give isl_space *isl_space_factor_domain(__isl_take isl_space *space)
1292 {
1293 space = isl_space_domain_factor_domain(space);
1294 space = isl_space_range_factor_domain(space);
1295 return space;
1296 }
1297
1298 /* Given a space of the form [A -> B] -> C, return the space A -> C.
1299 */
1300 __isl_give isl_space *isl_space_domain_factor_domain(
1301 __isl_take isl_space *space)
1302 {
1303 isl_space *nested;
1304 isl_space *domain;
1305
1306 if (!space)
1307 return NULL;
1308 if (!isl_space_domain_is_wrapping(space))
1309 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1310 "domain not a product", return isl_space_free(space));
1311
1312 nested = space->nested[0];
1313 domain = isl_space_copy(space);
1314 domain = isl_space_drop_dims(domain, isl_dim_in,
1315 nested->n_in, nested->n_out);
1316 if (!domain)
1317 return isl_space_free(space);
1318 if (nested->tuple_id[0]) {
1319 domain->tuple_id[0] = isl_id_copy(nested->tuple_id[0]);
1320 if (!domain->tuple_id[0])
1321 goto error;
1322 }
1323 if (nested->nested[0]) {
1324 domain->nested[0] = isl_space_copy(nested->nested[0]);
1325 if (!domain->nested[0])
1326 goto error;
1327 }
1328
1329 isl_space_free(space);
1330 return domain;
1331 error:
1332 isl_space_free(space);
1333 isl_space_free(domain);
1334 return NULL;
1335 }
1336
1337 /* Given a space of the form [A -> B] -> C, return the space B -> C.
1338 */
1339 __isl_give isl_space *isl_space_domain_factor_range(
1340 __isl_take isl_space *space)
1341 {
1342 isl_space *nested;
1343 isl_space *range;
1344
1345 if (!space)
1346 return NULL;
1347 if (!isl_space_domain_is_wrapping(space))
1348 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1349 "domain not a product", return isl_space_free(space));
1350
1351 nested = space->nested[0];
1352 range = isl_space_copy(space);
1353 range = isl_space_drop_dims(range, isl_dim_in, 0, nested->n_in);
1354 if (!range)
1355 return isl_space_free(space);
1356 if (nested->tuple_id[1]) {
1357 range->tuple_id[0] = isl_id_copy(nested->tuple_id[1]);
1358 if (!range->tuple_id[0])
1359 goto error;
1360 }
1361 if (nested->nested[1]) {
1362 range->nested[0] = isl_space_copy(nested->nested[1]);
1363 if (!range->nested[0])
1364 goto error;
1365 }
1366
1367 isl_space_free(space);
1368 return range;
1369 error:
1370 isl_space_free(space);
1371 isl_space_free(range);
1372 return NULL;
1373 }
1374
1375 /* Given a space of the form A -> [B -> C], return the space A -> B.
1376 */
1377 __isl_give isl_space *isl_space_range_factor_domain(
1378 __isl_take isl_space *space)
1379 {
1380 isl_space *nested;
1381 isl_space *domain;
1382
1383 if (!space)
1384 return NULL;
1385 if (!isl_space_range_is_wrapping(space))
1386 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1387 "range not a product", return isl_space_free(space));
1388
1389 nested = space->nested[1];
1390 domain = isl_space_copy(space);
1391 domain = isl_space_drop_dims(domain, isl_dim_out,
1392 nested->n_in, nested->n_out);
1393 if (!domain)
1394 return isl_space_free(space);
1395 if (nested->tuple_id[0]) {
1396 domain->tuple_id[1] = isl_id_copy(nested->tuple_id[0]);
1397 if (!domain->tuple_id[1])
1398 goto error;
1399 }
1400 if (nested->nested[0]) {
1401 domain->nested[1] = isl_space_copy(nested->nested[0]);
1402 if (!domain->nested[1])
1403 goto error;
1404 }
1405
1406 isl_space_free(space);
1407 return domain;
1408 error:
1409 isl_space_free(space);
1410 isl_space_free(domain);
1411 return NULL;
1412 }
1413
1414 /* Internal function that selects the range of the map that is
1415 * embedded in either a set space or the range of a map space.
1416 * In particular, given a space of the form [A -> B], return the space B.
1417 * Given a space of the form A -> [B -> C], return the space A -> C.
1418 */
1419 static __isl_give isl_space *range_factor_range(__isl_take isl_space *space)
1420 {
1421 isl_space *nested;
1422 isl_space *range;
1423
1424 if (!space)
1425 return NULL;
1426
1427 nested = space->nested[1];
1428 range = isl_space_copy(space);
1429 range = isl_space_drop_dims(range, isl_dim_out, 0, nested->n_in);
1430 if (!range)
1431 return isl_space_free(space);
1432 if (nested->tuple_id[1]) {
1433 range->tuple_id[1] = isl_id_copy(nested->tuple_id[1]);
1434 if (!range->tuple_id[1])
1435 goto error;
1436 }
1437 if (nested->nested[1]) {
1438 range->nested[1] = isl_space_copy(nested->nested[1]);
1439 if (!range->nested[1])
1440 goto error;
1441 }
1442
1443 isl_space_free(space);
1444 return range;
1445 error:
1446 isl_space_free(space);
1447 isl_space_free(range);
1448 return NULL;
1449 }
1450
1451 /* Given a space of the form A -> [B -> C], return the space A -> C.
1452 */
1453 __isl_give isl_space *isl_space_range_factor_range(
1454 __isl_take isl_space *space)
1455 {
1456 if (!space)
1457 return NULL;
1458 if (!isl_space_range_is_wrapping(space))
1459 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1460 "range not a product", return isl_space_free(space));
1461
1462 return range_factor_range(space);
1463 }
1464
1465 /* Given a space of the form [A -> B], return the space B.
1466 */
1467 static __isl_give isl_space *set_factor_range(__isl_take isl_space *space)
1468 {
1469 if (!space)
1470 return NULL;
1471 if (!isl_space_is_wrapping(space))
1472 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1473 "not a product", return isl_space_free(space));
1474
1475 return range_factor_range(space);
1476 }
1477
1478 /* Given a space of the form [A -> B] -> [C -> D], return the space B -> D.
1479 * Given a space of the form [A -> B], return the space B.
1480 */
1481 __isl_give isl_space *isl_space_factor_range(__isl_take isl_space *space)
1482 {
1483 if (!space)
1484 return NULL;
1485 if (isl_space_is_set(space))
1486 return set_factor_range(space);
1487 space = isl_space_domain_factor_range(space);
1488 space = isl_space_range_factor_range(space);
1489 return space;
1490 }
1491
1492 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *dim)
1493 {
1494 isl_ctx *ctx;
1495 isl_id **ids = NULL;
1496
1497 if (!dim)
1498 return NULL;
1499 ctx = isl_space_get_ctx(dim);
1500 if (!isl_space_is_set(dim))
1501 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1502 dim = isl_space_cow(dim);
1503 if (!dim)
1504 return NULL;
1505 if (dim->ids) {
1506 ids = isl_calloc_array(dim->ctx, isl_id *,
1507 dim->nparam + dim->n_out + dim->n_out);
1508 if (!ids)
1509 goto error;
1510 get_ids(dim, isl_dim_param, 0, dim->nparam, ids);
1511 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->nparam);
1512 }
1513 dim->n_in = dim->n_out;
1514 if (ids) {
1515 free(dim->ids);
1516 dim->ids = ids;
1517 dim->n_id = dim->nparam + dim->n_out + dim->n_out;
1518 dim = copy_ids(dim, isl_dim_out, 0, dim, isl_dim_in);
1519 }
1520 isl_id_free(dim->tuple_id[0]);
1521 dim->tuple_id[0] = isl_id_copy(dim->tuple_id[1]);
1522 isl_space_free(dim->nested[0]);
1523 dim->nested[0] = isl_space_copy(dim->nested[1]);
1524 return dim;
1525 error:
1526 isl_space_free(dim);
1527 return NULL;
1528 }
1529
1530 __isl_give isl_space *isl_space_map_from_domain_and_range(
1531 __isl_take isl_space *domain, __isl_take isl_space *range)
1532 {
1533 if (!domain || !range)
1534 goto error;
1535 if (!isl_space_is_set(domain))
1536 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1537 "domain is not a set space", goto error);
1538 if (!isl_space_is_set(range))
1539 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1540 "range is not a set space", goto error);
1541 return isl_space_join(isl_space_reverse(domain), range);
1542 error:
1543 isl_space_free(domain);
1544 isl_space_free(range);
1545 return NULL;
1546 }
1547
1548 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1549 enum isl_dim_type type,
1550 unsigned first, unsigned n, __isl_take isl_id **ids)
1551 {
1552 int i;
1553
1554 for (i = 0; i < n ; ++i)
1555 dim = set_id(dim, type, first + i, ids[i]);
1556
1557 return dim;
1558 }
1559
1560 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1561 {
1562 unsigned t;
1563 isl_space *nested;
1564 isl_id **ids = NULL;
1565 isl_id *id;
1566
1567 if (!dim)
1568 return NULL;
1569 if (match(dim, isl_dim_in, dim, isl_dim_out))
1570 return dim;
1571
1572 dim = isl_space_cow(dim);
1573 if (!dim)
1574 return NULL;
1575
1576 id = dim->tuple_id[0];
1577 dim->tuple_id[0] = dim->tuple_id[1];
1578 dim->tuple_id[1] = id;
1579
1580 nested = dim->nested[0];
1581 dim->nested[0] = dim->nested[1];
1582 dim->nested[1] = nested;
1583
1584 if (dim->ids) {
1585 int n_id = dim->n_in + dim->n_out;
1586 ids = isl_alloc_array(dim->ctx, isl_id *, n_id);
1587 if (n_id && !ids)
1588 goto error;
1589 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1590 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1591 }
1592
1593 t = dim->n_in;
1594 dim->n_in = dim->n_out;
1595 dim->n_out = t;
1596
1597 if (dim->ids) {
1598 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1599 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1600 free(ids);
1601 }
1602
1603 return dim;
1604 error:
1605 free(ids);
1606 isl_space_free(dim);
1607 return NULL;
1608 }
1609
1610 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1611 enum isl_dim_type type, unsigned first, unsigned num)
1612 {
1613 int i;
1614
1615 if (!dim)
1616 return NULL;
1617
1618 if (num == 0)
1619 return isl_space_reset(dim, type);
1620
1621 if (!valid_dim_type(type))
1622 isl_die(dim->ctx, isl_error_invalid,
1623 "cannot drop dimensions of specified type", goto error);
1624
1625 if (first + num > n(dim, type) || first + num < first)
1626 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1627 "index out of bounds", return isl_space_free(dim));
1628 dim = isl_space_cow(dim);
1629 if (!dim)
1630 goto error;
1631 if (dim->ids) {
1632 dim = extend_ids(dim);
1633 if (!dim)
1634 goto error;
1635 for (i = 0; i < num; ++i)
1636 isl_id_free(get_id(dim, type, first + i));
1637 for (i = first+num; i < n(dim, type); ++i)
1638 set_id(dim, type, i - num, get_id(dim, type, i));
1639 switch (type) {
1640 case isl_dim_param:
1641 get_ids(dim, isl_dim_in, 0, dim->n_in,
1642 dim->ids + offset(dim, isl_dim_in) - num);
1643 case isl_dim_in:
1644 get_ids(dim, isl_dim_out, 0, dim->n_out,
1645 dim->ids + offset(dim, isl_dim_out) - num);
1646 default:
1647 ;
1648 }
1649 dim->n_id -= num;
1650 }
1651 switch (type) {
1652 case isl_dim_param: dim->nparam -= num; break;
1653 case isl_dim_in: dim->n_in -= num; break;
1654 case isl_dim_out: dim->n_out -= num; break;
1655 default: ;
1656 }
1657 dim = isl_space_reset(dim, type);
1658 if (type == isl_dim_param) {
1659 if (dim && dim->nested[0] &&
1660 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1661 isl_dim_param, first, num)))
1662 goto error;
1663 if (dim && dim->nested[1] &&
1664 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1665 isl_dim_param, first, num)))
1666 goto error;
1667 }
1668 return dim;
1669 error:
1670 isl_space_free(dim);
1671 return NULL;
1672 }
1673
1674 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1675 unsigned first, unsigned n)
1676 {
1677 if (!dim)
1678 return NULL;
1679 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1680 }
1681
1682 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1683 unsigned first, unsigned n)
1684 {
1685 if (!dim)
1686 return NULL;
1687 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1688 }
1689
1690 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1691 {
1692 if (!dim)
1693 return NULL;
1694 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1695 dim = isl_space_reverse(dim);
1696 dim = mark_as_set(dim);
1697 return dim;
1698 }
1699
1700 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1701 {
1702 if (!dim)
1703 return NULL;
1704 if (!isl_space_is_set(dim))
1705 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1706 "not a set space", goto error);
1707 dim = isl_space_reverse(dim);
1708 dim = isl_space_reset(dim, isl_dim_out);
1709 return dim;
1710 error:
1711 isl_space_free(dim);
1712 return NULL;
1713 }
1714
1715 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1716 {
1717 if (!dim)
1718 return NULL;
1719 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1720 dim = mark_as_set(dim);
1721 return dim;
1722 }
1723
1724 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1725 {
1726 if (!dim)
1727 return NULL;
1728 if (!isl_space_is_set(dim))
1729 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1730 "not a set space", goto error);
1731 return isl_space_reset(dim, isl_dim_in);
1732 error:
1733 isl_space_free(dim);
1734 return NULL;
1735 }
1736
1737 /* Given a map space A -> B, return the map space [A -> B] -> A.
1738 */
1739 __isl_give isl_space *isl_space_domain_map(__isl_take isl_space *space)
1740 {
1741 isl_space *domain;
1742
1743 domain = isl_space_from_range(isl_space_domain(isl_space_copy(space)));
1744 space = isl_space_from_domain(isl_space_wrap(space));
1745 space = isl_space_join(space, domain);
1746
1747 return space;
1748 }
1749
1750 /* Given a map space A -> B, return the map space [A -> B] -> B.
1751 */
1752 __isl_give isl_space *isl_space_range_map(__isl_take isl_space *space)
1753 {
1754 isl_space *range;
1755
1756 range = isl_space_from_range(isl_space_range(isl_space_copy(space)));
1757 space = isl_space_from_domain(isl_space_wrap(space));
1758 space = isl_space_join(space, range);
1759
1760 return space;
1761 }
1762
1763 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1764 {
1765 if (isl_space_is_params(space))
1766 return space;
1767 space = isl_space_drop_dims(space,
1768 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1769 space = isl_space_drop_dims(space,
1770 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1771 space = mark_as_params(space);
1772 return space;
1773 }
1774
1775 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1776 {
1777 if (!space)
1778 return NULL;
1779 if (!isl_space_is_params(space))
1780 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1781 "not a parameter space", goto error);
1782 return isl_space_reset(space, isl_dim_set);
1783 error:
1784 isl_space_free(space);
1785 return NULL;
1786 }
1787
1788 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1789 unsigned n_div)
1790 {
1791 int i;
1792
1793 if (!dim)
1794 return NULL;
1795 if (n_div == 0 &&
1796 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1797 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1798 dim = isl_space_cow(dim);
1799 if (!dim)
1800 return NULL;
1801 dim->n_out += dim->nparam + dim->n_in + n_div;
1802 dim->nparam = 0;
1803 dim->n_in = 0;
1804
1805 for (i = 0; i < dim->n_id; ++i)
1806 isl_id_free(get_id(dim, isl_dim_out, i));
1807 dim->n_id = 0;
1808 dim = isl_space_reset(dim, isl_dim_in);
1809 dim = isl_space_reset(dim, isl_dim_out);
1810
1811 return dim;
1812 }
1813
1814 /* Are the two spaces the same, including positions and names of parameters?
1815 */
1816 isl_bool isl_space_is_equal(__isl_keep isl_space *dim1,
1817 __isl_keep isl_space *dim2)
1818 {
1819 if (!dim1 || !dim2)
1820 return isl_bool_error;
1821 if (dim1 == dim2)
1822 return isl_bool_true;
1823 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1824 isl_space_tuple_is_equal(dim1, isl_dim_in, dim2, isl_dim_in) &&
1825 isl_space_tuple_is_equal(dim1, isl_dim_out, dim2, isl_dim_out);
1826 }
1827
1828 /* Is space1 equal to the domain of space2?
1829 *
1830 * In the internal version we also allow space2 to be the space of a set,
1831 * provided space1 is a parameter space.
1832 */
1833 isl_bool isl_space_is_domain_internal(__isl_keep isl_space *space1,
1834 __isl_keep isl_space *space2)
1835 {
1836 if (!space1 || !space2)
1837 return isl_bool_error;
1838 if (!isl_space_is_set(space1))
1839 return isl_bool_false;
1840 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1841 isl_space_tuple_is_equal(space1, isl_dim_set,
1842 space2, isl_dim_in);
1843 }
1844
1845 /* Is space1 equal to the domain of space2?
1846 */
1847 isl_bool isl_space_is_domain(__isl_keep isl_space *space1,
1848 __isl_keep isl_space *space2)
1849 {
1850 if (!space2)
1851 return isl_bool_error;
1852 if (!isl_space_is_map(space2))
1853 return isl_bool_false;
1854 return isl_space_is_domain_internal(space1, space2);
1855 }
1856
1857 /* Is space1 equal to the range of space2?
1858 *
1859 * In the internal version, space2 is allowed to be the space of a set,
1860 * in which case it should be equal to space1.
1861 */
1862 isl_bool isl_space_is_range_internal(__isl_keep isl_space *space1,
1863 __isl_keep isl_space *space2)
1864 {
1865 if (!space1 || !space2)
1866 return isl_bool_error;
1867 if (!isl_space_is_set(space1))
1868 return isl_bool_false;
1869 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1870 isl_space_tuple_is_equal(space1, isl_dim_set,
1871 space2, isl_dim_out);
1872 }
1873
1874 /* Is space1 equal to the range of space2?
1875 */
1876 isl_bool isl_space_is_range(__isl_keep isl_space *space1,
1877 __isl_keep isl_space *space2)
1878 {
1879 if (!space2)
1880 return isl_bool_error;
1881 if (!isl_space_is_map(space2))
1882 return isl_bool_false;
1883 return isl_space_is_range_internal(space1, space2);
1884 }
1885
1886 /* Update "hash" by hashing in "space".
1887 * Changes in this function should be reflected in isl_hash_space_domain.
1888 */
1889 static uint32_t isl_hash_space(uint32_t hash, __isl_keep isl_space *space)
1890 {
1891 int i;
1892 isl_id *id;
1893
1894 if (!space)
1895 return hash;
1896
1897 isl_hash_byte(hash, space->nparam % 256);
1898 isl_hash_byte(hash, space->n_in % 256);
1899 isl_hash_byte(hash, space->n_out % 256);
1900
1901 for (i = 0; i < space->nparam; ++i) {
1902 id = get_id(space, isl_dim_param, i);
1903 hash = isl_hash_id(hash, id);
1904 }
1905
1906 id = tuple_id(space, isl_dim_in);
1907 hash = isl_hash_id(hash, id);
1908 id = tuple_id(space, isl_dim_out);
1909 hash = isl_hash_id(hash, id);
1910
1911 hash = isl_hash_space(hash, space->nested[0]);
1912 hash = isl_hash_space(hash, space->nested[1]);
1913
1914 return hash;
1915 }
1916
1917 /* Update "hash" by hashing in the domain of "space".
1918 * The result of this function is equal to the result of applying
1919 * isl_hash_space to the domain of "space".
1920 */
1921 static uint32_t isl_hash_space_domain(uint32_t hash,
1922 __isl_keep isl_space *space)
1923 {
1924 int i;
1925 isl_id *id;
1926
1927 if (!space)
1928 return hash;
1929
1930 isl_hash_byte(hash, space->nparam % 256);
1931 isl_hash_byte(hash, 0);
1932 isl_hash_byte(hash, space->n_in % 256);
1933
1934 for (i = 0; i < space->nparam; ++i) {
1935 id = get_id(space, isl_dim_param, i);
1936 hash = isl_hash_id(hash, id);
1937 }
1938
1939 hash = isl_hash_id(hash, &isl_id_none);
1940 id = tuple_id(space, isl_dim_in);
1941 hash = isl_hash_id(hash, id);
1942
1943 hash = isl_hash_space(hash, space->nested[0]);
1944
1945 return hash;
1946 }
1947
1948 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1949 {
1950 uint32_t hash;
1951
1952 if (!dim)
1953 return 0;
1954
1955 hash = isl_hash_init();
1956 hash = isl_hash_space(hash, dim);
1957
1958 return hash;
1959 }
1960
1961 /* Return the hash value of the domain of "space".
1962 * That is, isl_space_get_domain_hash(space) is equal to
1963 * isl_space_get_hash(isl_space_domain(space)).
1964 */
1965 uint32_t isl_space_get_domain_hash(__isl_keep isl_space *space)
1966 {
1967 uint32_t hash;
1968
1969 if (!space)
1970 return 0;
1971
1972 hash = isl_hash_init();
1973 hash = isl_hash_space_domain(hash, space);
1974
1975 return hash;
1976 }
1977
1978 isl_bool isl_space_is_wrapping(__isl_keep isl_space *dim)
1979 {
1980 if (!dim)
1981 return isl_bool_error;
1982
1983 if (!isl_space_is_set(dim))
1984 return isl_bool_false;
1985
1986 return dim->nested[1] != NULL;
1987 }
1988
1989 /* Is "space" the space of a map where the domain is a wrapped map space?
1990 */
1991 isl_bool isl_space_domain_is_wrapping(__isl_keep isl_space *space)
1992 {
1993 if (!space)
1994 return isl_bool_error;
1995
1996 if (isl_space_is_set(space))
1997 return isl_bool_false;
1998
1999 return space->nested[0] != NULL;
2000 }
2001
2002 /* Is "space" the space of a map where the range is a wrapped map space?
2003 */
2004 isl_bool isl_space_range_is_wrapping(__isl_keep isl_space *space)
2005 {
2006 if (!space)
2007 return isl_bool_error;
2008
2009 if (isl_space_is_set(space))
2010 return isl_bool_false;
2011
2012 return space->nested[1] != NULL;
2013 }
2014
2015 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
2016 {
2017 isl_space *wrap;
2018
2019 if (!dim)
2020 return NULL;
2021
2022 wrap = isl_space_set_alloc(dim->ctx,
2023 dim->nparam, dim->n_in + dim->n_out);
2024
2025 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
2026 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
2027 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
2028
2029 if (!wrap)
2030 goto error;
2031
2032 wrap->nested[1] = dim;
2033
2034 return wrap;
2035 error:
2036 isl_space_free(dim);
2037 return NULL;
2038 }
2039
2040 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
2041 {
2042 isl_space *unwrap;
2043
2044 if (!dim)
2045 return NULL;
2046
2047 if (!isl_space_is_wrapping(dim))
2048 isl_die(dim->ctx, isl_error_invalid, "not a wrapping space",
2049 goto error);
2050
2051 unwrap = isl_space_copy(dim->nested[1]);
2052 isl_space_free(dim);
2053
2054 return unwrap;
2055 error:
2056 isl_space_free(dim);
2057 return NULL;
2058 }
2059
2060 isl_bool isl_space_is_named_or_nested(__isl_keep isl_space *space,
2061 enum isl_dim_type type)
2062 {
2063 if (type != isl_dim_in && type != isl_dim_out)
2064 return isl_bool_false;
2065 if (!space)
2066 return isl_bool_error;
2067 if (space->tuple_id[type - isl_dim_in])
2068 return isl_bool_true;
2069 if (space->nested[type - isl_dim_in])
2070 return isl_bool_true;
2071 return isl_bool_false;
2072 }
2073
2074 isl_bool isl_space_may_be_set(__isl_keep isl_space *space)
2075 {
2076 isl_bool nested;
2077
2078 if (!space)
2079 return isl_bool_error;
2080 if (isl_space_is_set(space))
2081 return isl_bool_true;
2082 if (isl_space_dim(space, isl_dim_in) != 0)
2083 return isl_bool_false;
2084 nested = isl_space_is_named_or_nested(space, isl_dim_in);
2085 if (nested < 0 || nested)
2086 return isl_bool_not(nested);
2087 return isl_bool_true;
2088 }
2089
2090 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
2091 enum isl_dim_type type)
2092 {
2093 if (!isl_space_is_named_or_nested(dim, type))
2094 return dim;
2095
2096 dim = isl_space_cow(dim);
2097 if (!dim)
2098 return NULL;
2099
2100 isl_id_free(dim->tuple_id[type - isl_dim_in]);
2101 dim->tuple_id[type - isl_dim_in] = NULL;
2102 isl_space_free(dim->nested[type - isl_dim_in]);
2103 dim->nested[type - isl_dim_in] = NULL;
2104
2105 return dim;
2106 }
2107
2108 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
2109 {
2110 if (!dim)
2111 return NULL;
2112 if (!dim->nested[0] && !dim->nested[1])
2113 return dim;
2114
2115 if (dim->nested[0])
2116 dim = isl_space_reset(dim, isl_dim_in);
2117 if (dim && dim->nested[1])
2118 dim = isl_space_reset(dim, isl_dim_out);
2119
2120 return dim;
2121 }
2122
2123 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
2124 {
2125 if (!dim)
2126 return NULL;
2127 if (!dim->nested[0])
2128 return dim;
2129
2130 return isl_space_reset(dim, isl_dim_in);
2131 }
2132
2133 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
2134 {
2135 if (!dim)
2136 return NULL;
2137 if (!dim->nested[1])
2138 return dim;
2139
2140 return isl_space_reset(dim, isl_dim_out);
2141 }
2142
2143 /* Replace the dimensions of the given type of dst by those of src.
2144 */
2145 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
2146 enum isl_dim_type type, __isl_keep isl_space *src)
2147 {
2148 dst = isl_space_cow(dst);
2149
2150 if (!dst || !src)
2151 goto error;
2152
2153 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
2154 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
2155 dst = copy_ids(dst, type, 0, src, type);
2156
2157 if (dst && type == isl_dim_param) {
2158 int i;
2159 for (i = 0; i <= 1; ++i) {
2160 if (!dst->nested[i])
2161 continue;
2162 dst->nested[i] = isl_space_replace(dst->nested[i],
2163 type, src);
2164 if (!dst->nested[i])
2165 goto error;
2166 }
2167 }
2168
2169 return dst;
2170 error:
2171 isl_space_free(dst);
2172 return NULL;
2173 }
2174
2175 /* Given a dimension specification "dim" of a set, create a dimension
2176 * specification for the lift of the set. In particular, the result
2177 * is of the form [dim -> local[..]], with n_local variables in the
2178 * range of the wrapped map.
2179 */
2180 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
2181 {
2182 isl_space *local_dim;
2183
2184 if (!dim)
2185 return NULL;
2186
2187 local_dim = isl_space_dup(dim);
2188 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
2189 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
2190 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
2191 dim = isl_space_join(isl_space_from_domain(dim),
2192 isl_space_from_range(local_dim));
2193 dim = isl_space_wrap(dim);
2194 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
2195
2196 return dim;
2197 }
2198
2199 isl_bool isl_space_can_zip(__isl_keep isl_space *dim)
2200 {
2201 if (!dim)
2202 return isl_bool_error;
2203
2204 return dim->nested[0] && dim->nested[1];
2205 }
2206
2207 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
2208 {
2209 isl_space *dom, *ran;
2210 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
2211
2212 if (!isl_space_can_zip(dim))
2213 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
2214 goto error);
2215
2216 if (!dim)
2217 return NULL;
2218 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
2219 ran = isl_space_unwrap(isl_space_range(dim));
2220 dom_dom = isl_space_domain(isl_space_copy(dom));
2221 dom_ran = isl_space_range(dom);
2222 ran_dom = isl_space_domain(isl_space_copy(ran));
2223 ran_ran = isl_space_range(ran);
2224 dom = isl_space_join(isl_space_from_domain(dom_dom),
2225 isl_space_from_range(ran_dom));
2226 ran = isl_space_join(isl_space_from_domain(dom_ran),
2227 isl_space_from_range(ran_ran));
2228 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2229 isl_space_from_range(isl_space_wrap(ran)));
2230 error:
2231 isl_space_free(dim);
2232 return NULL;
2233 }
2234
2235 /* Can we apply isl_space_curry to "space"?
2236 * That is, does it have a nested relation in its domain?
2237 */
2238 isl_bool isl_space_can_curry(__isl_keep isl_space *space)
2239 {
2240 if (!space)
2241 return isl_bool_error;
2242
2243 return !!space->nested[0];
2244 }
2245
2246 /* Given a space (A -> B) -> C, return the corresponding space
2247 * A -> (B -> C).
2248 */
2249 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
2250 {
2251 isl_space *dom, *ran;
2252 isl_space *dom_dom, *dom_ran;
2253
2254 if (!space)
2255 return NULL;
2256
2257 if (!isl_space_can_curry(space))
2258 isl_die(space->ctx, isl_error_invalid,
2259 "space cannot be curried", goto error);
2260
2261 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
2262 ran = isl_space_range(space);
2263 dom_dom = isl_space_domain(isl_space_copy(dom));
2264 dom_ran = isl_space_range(dom);
2265 ran = isl_space_join(isl_space_from_domain(dom_ran),
2266 isl_space_from_range(ran));
2267 return isl_space_join(isl_space_from_domain(dom_dom),
2268 isl_space_from_range(isl_space_wrap(ran)));
2269 error:
2270 isl_space_free(space);
2271 return NULL;
2272 }
2273
2274 /* Can isl_space_range_curry be applied to "space"?
2275 * That is, does it have a nested relation in its range,
2276 * the domain of which is itself a nested relation?
2277 */
2278 isl_bool isl_space_can_range_curry(__isl_keep isl_space *space)
2279 {
2280 isl_bool can;
2281
2282 if (!space)
2283 return isl_bool_error;
2284 can = isl_space_range_is_wrapping(space);
2285 if (can < 0 || !can)
2286 return can;
2287 return isl_space_can_curry(space->nested[1]);
2288 }
2289
2290 /* Given a space A -> ((B -> C) -> D), return the corresponding space
2291 * A -> (B -> (C -> D)).
2292 */
2293 __isl_give isl_space *isl_space_range_curry(__isl_take isl_space *space)
2294 {
2295 if (!space)
2296 return NULL;
2297
2298 if (!isl_space_can_range_curry(space))
2299 isl_die(isl_space_get_ctx(space), isl_error_invalid,
2300 "space range cannot be curried",
2301 return isl_space_free(space));
2302
2303 space = isl_space_cow(space);
2304 if (!space)
2305 return NULL;
2306 space->nested[1] = isl_space_curry(space->nested[1]);
2307 if (!space->nested[1])
2308 return isl_space_free(space);
2309
2310 return space;
2311 }
2312
2313 /* Can we apply isl_space_uncurry to "space"?
2314 * That is, does it have a nested relation in its range?
2315 */
2316 isl_bool isl_space_can_uncurry(__isl_keep isl_space *space)
2317 {
2318 if (!space)
2319 return isl_bool_error;
2320
2321 return !!space->nested[1];
2322 }
2323
2324 /* Given a space A -> (B -> C), return the corresponding space
2325 * (A -> B) -> C.
2326 */
2327 __isl_give isl_space *isl_space_uncurry(__isl_take isl_space *space)
2328 {
2329 isl_space *dom, *ran;
2330 isl_space *ran_dom, *ran_ran;
2331
2332 if (!space)
2333 return NULL;
2334
2335 if (!isl_space_can_uncurry(space))
2336 isl_die(space->ctx, isl_error_invalid,
2337 "space cannot be uncurried",
2338 return isl_space_free(space));
2339
2340 dom = isl_space_domain(isl_space_copy(space));
2341 ran = isl_space_unwrap(isl_space_range(space));
2342 ran_dom = isl_space_domain(isl_space_copy(ran));
2343 ran_ran = isl_space_range(ran);
2344 dom = isl_space_join(isl_space_from_domain(dom),
2345 isl_space_from_range(ran_dom));
2346 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2347 isl_space_from_range(ran_ran));
2348 }
2349
2350 isl_bool isl_space_has_named_params(__isl_keep isl_space *space)
2351 {
2352 int i;
2353 unsigned off;
2354
2355 if (!space)
2356 return isl_bool_error;
2357 if (space->nparam == 0)
2358 return isl_bool_true;
2359 off = isl_space_offset(space, isl_dim_param);
2360 if (off + space->nparam > space->n_id)
2361 return isl_bool_false;
2362 for (i = 0; i < space->nparam; ++i)
2363 if (!space->ids[off + i])
2364 return isl_bool_false;
2365 return isl_bool_true;
2366 }
2367
2368 /* Check that "space" has only named parameters, reporting an error
2369 * if it does not.
2370 */
2371 isl_stat isl_space_check_named_params(__isl_keep isl_space *space)
2372 {
2373 isl_bool named;
2374
2375 named = isl_space_has_named_params(space);
2376 if (named < 0)
2377 return isl_stat_error;
2378 if (!named)
2379 isl_die(isl_space_get_ctx(space), isl_error_invalid,
2380 "unaligned unnamed parameters", return isl_stat_error);
2381
2382 return isl_stat_ok;
2383 }
2384
2385 /* Align the initial parameters of dim1 to match the order in dim2.
2386 */
2387 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
2388 __isl_take isl_space *dim2)
2389 {
2390 isl_reordering *exp;
2391
2392 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
2393 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
2394 "parameter alignment requires named parameters",
2395 goto error);
2396
2397 dim2 = isl_space_params(dim2);
2398 exp = isl_parameter_alignment_reordering(dim1, dim2);
2399 exp = isl_reordering_extend_space(exp, dim1);
2400 isl_space_free(dim2);
2401 if (!exp)
2402 return NULL;
2403 dim1 = isl_space_copy(exp->dim);
2404 isl_reordering_free(exp);
2405 return dim1;
2406 error:
2407 isl_space_free(dim1);
2408 isl_space_free(dim2);
2409 return NULL;
2410 }
2411
2412 /* Given the space of set (domain), construct a space for a map
2413 * with as domain the given space and as range the range of "model".
2414 */
2415 __isl_give isl_space *isl_space_extend_domain_with_range(
2416 __isl_take isl_space *space, __isl_take isl_space *model)
2417 {
2418 if (!model)
2419 goto error;
2420
2421 space = isl_space_from_domain(space);
2422 space = isl_space_add_dims(space, isl_dim_out,
2423 isl_space_dim(model, isl_dim_out));
2424 if (isl_space_has_tuple_id(model, isl_dim_out))
2425 space = isl_space_set_tuple_id(space, isl_dim_out,
2426 isl_space_get_tuple_id(model, isl_dim_out));
2427 if (!space)
2428 goto error;
2429 if (model->nested[1]) {
2430 isl_space *nested = isl_space_copy(model->nested[1]);
2431 int n_nested, n_space;
2432 nested = isl_space_align_params(nested, isl_space_copy(space));
2433 n_nested = isl_space_dim(nested, isl_dim_param);
2434 n_space = isl_space_dim(space, isl_dim_param);
2435 if (n_nested > n_space)
2436 nested = isl_space_drop_dims(nested, isl_dim_param,
2437 n_space, n_nested - n_space);
2438 if (!nested)
2439 goto error;
2440 space->nested[1] = nested;
2441 }
2442 isl_space_free(model);
2443 return space;
2444 error:
2445 isl_space_free(model);
2446 isl_space_free(space);
2447 return NULL;
2448 }
2449
2450 /* Compare the "type" dimensions of two isl_spaces.
2451 *
2452 * The order is fairly arbitrary.
2453 */
2454 static int isl_space_cmp_type(__isl_keep isl_space *space1,
2455 __isl_keep isl_space *space2, enum isl_dim_type type)
2456 {
2457 int cmp;
2458 isl_space *nested1, *nested2;
2459
2460 if (isl_space_dim(space1, type) != isl_space_dim(space2, type))
2461 return isl_space_dim(space1, type) -
2462 isl_space_dim(space2, type);
2463
2464 cmp = isl_id_cmp(tuple_id(space1, type), tuple_id(space2, type));
2465 if (cmp != 0)
2466 return cmp;
2467
2468 nested1 = nested(space1, type);
2469 nested2 = nested(space2, type);
2470 if (!nested1 != !nested2)
2471 return !nested1 - !nested2;
2472
2473 if (nested1)
2474 return isl_space_cmp(nested1, nested2);
2475
2476 return 0;
2477 }
2478
2479 /* Compare two isl_spaces.
2480 *
2481 * The order is fairly arbitrary.
2482 */
2483 int isl_space_cmp(__isl_keep isl_space *space1, __isl_keep isl_space *space2)
2484 {
2485 int i;
2486 int cmp;
2487
2488 if (space1 == space2)
2489 return 0;
2490 if (!space1)
2491 return -1;
2492 if (!space2)
2493 return 1;
2494
2495 cmp = isl_space_cmp_type(space1, space2, isl_dim_param);
2496 if (cmp != 0)
2497 return cmp;
2498 cmp = isl_space_cmp_type(space1, space2, isl_dim_in);
2499 if (cmp != 0)
2500 return cmp;
2501 cmp = isl_space_cmp_type(space1, space2, isl_dim_out);
2502 if (cmp != 0)
2503 return cmp;
2504
2505 if (!space1->ids && !space2->ids)
2506 return 0;
2507
2508 for (i = 0; i < n(space1, isl_dim_param); ++i) {
2509 cmp = isl_id_cmp(get_id(space1, isl_dim_param, i),
2510 get_id(space2, isl_dim_param, i));
2511 if (cmp != 0)
2512 return cmp;
2513 }
2514
2515 return 0;
2516 }
Integer set library