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Handle error conditions returned by level_before in isl_flow
[isl.git] / isl_space.c
blob389202daceed3dc6a0a82e73078177b32bc77ffb
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 int 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 1;
840
841 if (!isl_space_tuple_is_equal(space1, type1, space2, type2))
842 return 0;
843
844 if (!space1->ids && !space2->ids)
845 return 1;
846
847 for (i = 0; i < n(space1, type1); ++i) {
848 if (get_id(space1, type1, i) != get_id(space2, type2, i))
849 return 0;
850 }
851 return 1;
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 __isl_give isl_space *isl_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_add_dims(__isl_take isl_space *dim,
921 enum isl_dim_type type, unsigned n)
922 {
923 dim = isl_space_reset(dim, type);
924 if (!dim)
925 return NULL;
926 switch (type) {
927 case isl_dim_param:
928 dim = isl_space_extend(dim,
929 dim->nparam + n, dim->n_in, dim->n_out);
930 if (dim && dim->nested[0] &&
931 !(dim->nested[0] = isl_space_add_dims(dim->nested[0],
932 isl_dim_param, n)))
933 goto error;
934 if (dim && dim->nested[1] &&
935 !(dim->nested[1] = isl_space_add_dims(dim->nested[1],
936 isl_dim_param, n)))
937 goto error;
938 return dim;
939 case isl_dim_in:
940 return isl_space_extend(dim,
941 dim->nparam, dim->n_in + n, dim->n_out);
942 case isl_dim_out:
943 return isl_space_extend(dim,
944 dim->nparam, dim->n_in, dim->n_out + n);
945 default:
946 isl_die(dim->ctx, isl_error_invalid,
947 "cannot add dimensions of specified type", goto error);
948 }
949 error:
950 isl_space_free(dim);
951 return NULL;
952 }
953
954 static int valid_dim_type(enum isl_dim_type type)
955 {
956 switch (type) {
957 case isl_dim_param:
958 case isl_dim_in:
959 case isl_dim_out:
960 return 1;
961 default:
962 return 0;
963 }
964 }
965
966 /* Insert "n" dimensions of type "type" at position "pos".
967 * If we are inserting parameters, then they are also inserted in
968 * any nested spaces.
969 */
970 __isl_give isl_space *isl_space_insert_dims(__isl_take isl_space *dim,
971 enum isl_dim_type type, unsigned pos, unsigned n)
972 {
973 isl_id **ids = NULL;
974
975 if (!dim)
976 return NULL;
977 if (n == 0)
978 return isl_space_reset(dim, type);
979
980 if (!valid_dim_type(type))
981 isl_die(dim->ctx, isl_error_invalid,
982 "cannot insert dimensions of specified type",
983 goto error);
984
985 isl_assert(dim->ctx, pos <= isl_space_dim(dim, type), goto error);
986
987 dim = isl_space_cow(dim);
988 if (!dim)
989 return NULL;
990
991 if (dim->ids) {
992 enum isl_dim_type t, o = isl_dim_param;
993 int off;
994 int s[3];
995 ids = isl_calloc_array(dim->ctx, isl_id *,
996 dim->nparam + dim->n_in + dim->n_out + n);
997 if (!ids)
998 goto error;
999 off = 0;
1000 s[isl_dim_param - o] = dim->nparam;
1001 s[isl_dim_in - o] = dim->n_in;
1002 s[isl_dim_out - o] = dim->n_out;
1003 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1004 if (t != type) {
1005 get_ids(dim, t, 0, s[t - o], ids + off);
1006 off += s[t - o];
1007 } else {
1008 get_ids(dim, t, 0, pos, ids + off);
1009 off += pos + n;
1010 get_ids(dim, t, pos, s[t - o] - pos, ids + off);
1011 off += s[t - o] - pos;
1012 }
1013 }
1014 free(dim->ids);
1015 dim->ids = ids;
1016 dim->n_id = dim->nparam + dim->n_in + dim->n_out + n;
1017 }
1018 switch (type) {
1019 case isl_dim_param: dim->nparam += n; break;
1020 case isl_dim_in: dim->n_in += n; break;
1021 case isl_dim_out: dim->n_out += n; break;
1022 default: ;
1023 }
1024 dim = isl_space_reset(dim, type);
1025
1026 if (type == isl_dim_param) {
1027 if (dim && dim->nested[0] &&
1028 !(dim->nested[0] = isl_space_insert_dims(dim->nested[0],
1029 isl_dim_param, pos, n)))
1030 goto error;
1031 if (dim && dim->nested[1] &&
1032 !(dim->nested[1] = isl_space_insert_dims(dim->nested[1],
1033 isl_dim_param, pos, n)))
1034 goto error;
1035 }
1036
1037 return dim;
1038 error:
1039 isl_space_free(dim);
1040 return NULL;
1041 }
1042
1043 __isl_give isl_space *isl_space_move_dims(__isl_take isl_space *space,
1044 enum isl_dim_type dst_type, unsigned dst_pos,
1045 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1046 {
1047 int i;
1048
1049 space = isl_space_reset(space, src_type);
1050 space = isl_space_reset(space, dst_type);
1051 if (!space)
1052 return NULL;
1053 if (n == 0)
1054 return space;
1055
1056 isl_assert(space->ctx, src_pos + n <= isl_space_dim(space, src_type),
1057 goto error);
1058
1059 if (dst_type == src_type && dst_pos == src_pos)
1060 return space;
1061
1062 isl_assert(space->ctx, dst_type != src_type, goto error);
1063
1064 space = isl_space_cow(space);
1065 if (!space)
1066 return NULL;
1067
1068 if (space->ids) {
1069 isl_id **ids;
1070 enum isl_dim_type t, o = isl_dim_param;
1071 int off;
1072 int s[3];
1073 ids = isl_calloc_array(space->ctx, isl_id *,
1074 space->nparam + space->n_in + space->n_out);
1075 if (!ids)
1076 goto error;
1077 off = 0;
1078 s[isl_dim_param - o] = space->nparam;
1079 s[isl_dim_in - o] = space->n_in;
1080 s[isl_dim_out - o] = space->n_out;
1081 for (t = isl_dim_param; t <= isl_dim_out; ++t) {
1082 if (t == dst_type) {
1083 get_ids(space, t, 0, dst_pos, ids + off);
1084 off += dst_pos;
1085 get_ids(space, src_type, src_pos, n, ids + off);
1086 off += n;
1087 get_ids(space, t, dst_pos, s[t - o] - dst_pos,
1088 ids + off);
1089 off += s[t - o] - dst_pos;
1090 } else if (t == src_type) {
1091 get_ids(space, t, 0, src_pos, ids + off);
1092 off += src_pos;
1093 get_ids(space, t, src_pos + n,
1094 s[t - o] - src_pos - n, ids + off);
1095 off += s[t - o] - src_pos - n;
1096 } else {
1097 get_ids(space, t, 0, s[t - o], ids + off);
1098 off += s[t - o];
1099 }
1100 }
1101 free(space->ids);
1102 space->ids = ids;
1103 space->n_id = space->nparam + space->n_in + space->n_out;
1104 }
1105
1106 switch (dst_type) {
1107 case isl_dim_param: space->nparam += n; break;
1108 case isl_dim_in: space->n_in += n; break;
1109 case isl_dim_out: space->n_out += n; break;
1110 default: ;
1111 }
1112
1113 switch (src_type) {
1114 case isl_dim_param: space->nparam -= n; break;
1115 case isl_dim_in: space->n_in -= n; break;
1116 case isl_dim_out: space->n_out -= n; break;
1117 default: ;
1118 }
1119
1120 if (dst_type != isl_dim_param && src_type != isl_dim_param)
1121 return space;
1122
1123 for (i = 0; i < 2; ++i) {
1124 if (!space->nested[i])
1125 continue;
1126 space->nested[i] = isl_space_replace(space->nested[i],
1127 isl_dim_param, space);
1128 if (!space->nested[i])
1129 goto error;
1130 }
1131
1132 return space;
1133 error:
1134 isl_space_free(space);
1135 return NULL;
1136 }
1137
1138 __isl_give isl_space *isl_space_join(__isl_take isl_space *left,
1139 __isl_take isl_space *right)
1140 {
1141 isl_space *dim;
1142
1143 if (!left || !right)
1144 goto error;
1145
1146 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1147 goto error);
1148 isl_assert(left->ctx,
1149 isl_space_tuple_is_equal(left, isl_dim_out, right, isl_dim_in),
1150 goto error);
1151
1152 dim = isl_space_alloc(left->ctx, left->nparam, left->n_in, right->n_out);
1153 if (!dim)
1154 goto error;
1155
1156 dim = copy_ids(dim, isl_dim_param, 0, left, isl_dim_param);
1157 dim = copy_ids(dim, isl_dim_in, 0, left, isl_dim_in);
1158 dim = copy_ids(dim, isl_dim_out, 0, right, isl_dim_out);
1159
1160 if (dim && left->tuple_id[0] &&
1161 !(dim->tuple_id[0] = isl_id_copy(left->tuple_id[0])))
1162 goto error;
1163 if (dim && right->tuple_id[1] &&
1164 !(dim->tuple_id[1] = isl_id_copy(right->tuple_id[1])))
1165 goto error;
1166 if (dim && left->nested[0] &&
1167 !(dim->nested[0] = isl_space_copy(left->nested[0])))
1168 goto error;
1169 if (dim && right->nested[1] &&
1170 !(dim->nested[1] = isl_space_copy(right->nested[1])))
1171 goto error;
1172
1173 isl_space_free(left);
1174 isl_space_free(right);
1175
1176 return dim;
1177 error:
1178 isl_space_free(left);
1179 isl_space_free(right);
1180 return NULL;
1181 }
1182
1183 /* Given two map spaces { A -> C } and { B -> D }, construct the space
1184 * { [A -> B] -> [C -> D] }.
1185 * Given two set spaces { A } and { B }, construct the space { [A -> B] }.
1186 */
1187 __isl_give isl_space *isl_space_product(__isl_take isl_space *left,
1188 __isl_take isl_space *right)
1189 {
1190 isl_space *dom1, *dom2, *nest1, *nest2;
1191 int is_set;
1192
1193 if (!left || !right)
1194 goto error;
1195
1196 is_set = isl_space_is_set(left);
1197 if (is_set != isl_space_is_set(right))
1198 isl_die(isl_space_get_ctx(left), isl_error_invalid,
1199 "expecting either two set spaces or two map spaces",
1200 goto error);
1201 if (is_set)
1202 return isl_space_range_product(left, right);
1203
1204 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1205 goto error);
1206
1207 dom1 = isl_space_domain(isl_space_copy(left));
1208 dom2 = isl_space_domain(isl_space_copy(right));
1209 nest1 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1210
1211 dom1 = isl_space_range(left);
1212 dom2 = isl_space_range(right);
1213 nest2 = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1214
1215 return isl_space_join(isl_space_reverse(nest1), nest2);
1216 error:
1217 isl_space_free(left);
1218 isl_space_free(right);
1219 return NULL;
1220 }
1221
1222 /* Given two spaces { A -> C } and { B -> C }, construct the space
1223 * { [A -> B] -> C }
1224 */
1225 __isl_give isl_space *isl_space_domain_product(__isl_take isl_space *left,
1226 __isl_take isl_space *right)
1227 {
1228 isl_space *ran, *dom1, *dom2, *nest;
1229
1230 if (!left || !right)
1231 goto error;
1232
1233 if (!match(left, isl_dim_param, right, isl_dim_param))
1234 isl_die(left->ctx, isl_error_invalid,
1235 "parameters need to match", goto error);
1236 if (!isl_space_tuple_is_equal(left, isl_dim_out, right, isl_dim_out))
1237 isl_die(left->ctx, isl_error_invalid,
1238 "ranges need to match", goto error);
1239
1240 ran = isl_space_range(isl_space_copy(left));
1241
1242 dom1 = isl_space_domain(left);
1243 dom2 = isl_space_domain(right);
1244 nest = isl_space_wrap(isl_space_join(isl_space_reverse(dom1), dom2));
1245
1246 return isl_space_join(isl_space_reverse(nest), ran);
1247 error:
1248 isl_space_free(left);
1249 isl_space_free(right);
1250 return NULL;
1251 }
1252
1253 __isl_give isl_space *isl_space_range_product(__isl_take isl_space *left,
1254 __isl_take isl_space *right)
1255 {
1256 isl_space *dom, *ran1, *ran2, *nest;
1257
1258 if (!left || !right)
1259 goto error;
1260
1261 isl_assert(left->ctx, match(left, isl_dim_param, right, isl_dim_param),
1262 goto error);
1263 if (!isl_space_tuple_is_equal(left, isl_dim_in, right, isl_dim_in))
1264 isl_die(left->ctx, isl_error_invalid,
1265 "domains need to match", goto error);
1266
1267 dom = isl_space_domain(isl_space_copy(left));
1268
1269 ran1 = isl_space_range(left);
1270 ran2 = isl_space_range(right);
1271 nest = isl_space_wrap(isl_space_join(isl_space_reverse(ran1), ran2));
1272
1273 return isl_space_join(isl_space_reverse(dom), nest);
1274 error:
1275 isl_space_free(left);
1276 isl_space_free(right);
1277 return NULL;
1278 }
1279
1280 /* Given a space of the form [A -> B] -> [C -> D], return the space A -> C.
1281 */
1282 __isl_give isl_space *isl_space_factor_domain(__isl_take isl_space *space)
1283 {
1284 space = isl_space_domain_factor_domain(space);
1285 space = isl_space_range_factor_domain(space);
1286 return space;
1287 }
1288
1289 /* Given a space of the form [A -> B] -> C, return the space A -> C.
1290 */
1291 __isl_give isl_space *isl_space_domain_factor_domain(
1292 __isl_take isl_space *space)
1293 {
1294 isl_space *nested;
1295 isl_space *domain;
1296
1297 if (!space)
1298 return NULL;
1299 if (!isl_space_domain_is_wrapping(space))
1300 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1301 "domain not a product", return isl_space_free(space));
1302
1303 nested = space->nested[0];
1304 domain = isl_space_copy(space);
1305 domain = isl_space_drop_dims(domain, isl_dim_in,
1306 nested->n_in, nested->n_out);
1307 if (!domain)
1308 return isl_space_free(space);
1309 if (nested->tuple_id[0]) {
1310 domain->tuple_id[0] = isl_id_copy(nested->tuple_id[0]);
1311 if (!domain->tuple_id[0])
1312 goto error;
1313 }
1314 if (nested->nested[0]) {
1315 domain->nested[0] = isl_space_copy(nested->nested[0]);
1316 if (!domain->nested[0])
1317 goto error;
1318 }
1319
1320 isl_space_free(space);
1321 return domain;
1322 error:
1323 isl_space_free(space);
1324 isl_space_free(domain);
1325 return NULL;
1326 }
1327
1328 /* Given a space of the form [A -> B] -> C, return the space B -> C.
1329 */
1330 __isl_give isl_space *isl_space_domain_factor_range(
1331 __isl_take isl_space *space)
1332 {
1333 isl_space *nested;
1334 isl_space *range;
1335
1336 if (!space)
1337 return NULL;
1338 if (!isl_space_domain_is_wrapping(space))
1339 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1340 "domain not a product", return isl_space_free(space));
1341
1342 nested = space->nested[0];
1343 range = isl_space_copy(space);
1344 range = isl_space_drop_dims(range, isl_dim_in, 0, nested->n_in);
1345 if (!range)
1346 return isl_space_free(space);
1347 if (nested->tuple_id[1]) {
1348 range->tuple_id[0] = isl_id_copy(nested->tuple_id[1]);
1349 if (!range->tuple_id[0])
1350 goto error;
1351 }
1352 if (nested->nested[1]) {
1353 range->nested[0] = isl_space_copy(nested->nested[1]);
1354 if (!range->nested[0])
1355 goto error;
1356 }
1357
1358 isl_space_free(space);
1359 return range;
1360 error:
1361 isl_space_free(space);
1362 isl_space_free(range);
1363 return NULL;
1364 }
1365
1366 /* Given a space of the form A -> [B -> C], return the space A -> B.
1367 */
1368 __isl_give isl_space *isl_space_range_factor_domain(
1369 __isl_take isl_space *space)
1370 {
1371 isl_space *nested;
1372 isl_space *domain;
1373
1374 if (!space)
1375 return NULL;
1376 if (!isl_space_range_is_wrapping(space))
1377 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1378 "range not a product", return isl_space_free(space));
1379
1380 nested = space->nested[1];
1381 domain = isl_space_copy(space);
1382 domain = isl_space_drop_dims(domain, isl_dim_out,
1383 nested->n_in, nested->n_out);
1384 if (!domain)
1385 return isl_space_free(space);
1386 if (nested->tuple_id[0]) {
1387 domain->tuple_id[1] = isl_id_copy(nested->tuple_id[0]);
1388 if (!domain->tuple_id[1])
1389 goto error;
1390 }
1391 if (nested->nested[0]) {
1392 domain->nested[1] = isl_space_copy(nested->nested[0]);
1393 if (!domain->nested[1])
1394 goto error;
1395 }
1396
1397 isl_space_free(space);
1398 return domain;
1399 error:
1400 isl_space_free(space);
1401 isl_space_free(domain);
1402 return NULL;
1403 }
1404
1405 /* Internal function that selects the range of the map that is
1406 * embedded in either a set space or the range of a map space.
1407 * In particular, given a space of the form [A -> B], return the space B.
1408 * Given a space of the form A -> [B -> C], return the space A -> C.
1409 */
1410 static __isl_give isl_space *range_factor_range(__isl_take isl_space *space)
1411 {
1412 isl_space *nested;
1413 isl_space *range;
1414
1415 if (!space)
1416 return NULL;
1417
1418 nested = space->nested[1];
1419 range = isl_space_copy(space);
1420 range = isl_space_drop_dims(range, isl_dim_out, 0, nested->n_in);
1421 if (!range)
1422 return isl_space_free(space);
1423 if (nested->tuple_id[1]) {
1424 range->tuple_id[1] = isl_id_copy(nested->tuple_id[1]);
1425 if (!range->tuple_id[1])
1426 goto error;
1427 }
1428 if (nested->nested[1]) {
1429 range->nested[1] = isl_space_copy(nested->nested[1]);
1430 if (!range->nested[1])
1431 goto error;
1432 }
1433
1434 isl_space_free(space);
1435 return range;
1436 error:
1437 isl_space_free(space);
1438 isl_space_free(range);
1439 return NULL;
1440 }
1441
1442 /* Given a space of the form A -> [B -> C], return the space A -> C.
1443 */
1444 __isl_give isl_space *isl_space_range_factor_range(
1445 __isl_take isl_space *space)
1446 {
1447 if (!space)
1448 return NULL;
1449 if (!isl_space_range_is_wrapping(space))
1450 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1451 "range not a product", return isl_space_free(space));
1452
1453 return range_factor_range(space);
1454 }
1455
1456 /* Given a space of the form [A -> B], return the space B.
1457 */
1458 static __isl_give isl_space *set_factor_range(__isl_take isl_space *space)
1459 {
1460 if (!space)
1461 return NULL;
1462 if (!isl_space_is_wrapping(space))
1463 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1464 "not a product", return isl_space_free(space));
1465
1466 return range_factor_range(space);
1467 }
1468
1469 /* Given a space of the form [A -> B] -> [C -> D], return the space B -> D.
1470 * Given a space of the form [A -> B], return the space B.
1471 */
1472 __isl_give isl_space *isl_space_factor_range(__isl_take isl_space *space)
1473 {
1474 if (!space)
1475 return NULL;
1476 if (isl_space_is_set(space))
1477 return set_factor_range(space);
1478 space = isl_space_domain_factor_range(space);
1479 space = isl_space_range_factor_range(space);
1480 return space;
1481 }
1482
1483 __isl_give isl_space *isl_space_map_from_set(__isl_take isl_space *space)
1484 {
1485 isl_ctx *ctx;
1486 isl_id **ids = NULL;
1487 int n_id;
1488
1489 if (!space)
1490 return NULL;
1491 ctx = isl_space_get_ctx(space);
1492 if (!isl_space_is_set(space))
1493 isl_die(ctx, isl_error_invalid, "not a set space", goto error);
1494 space = isl_space_cow(space);
1495 if (!space)
1496 return NULL;
1497 n_id = space->nparam + space->n_out + space->n_out;
1498 if (n_id > 0 && space->ids) {
1499 ids = isl_calloc_array(space->ctx, isl_id *, n_id);
1500 if (!ids)
1501 goto error;
1502 get_ids(space, isl_dim_param, 0, space->nparam, ids);
1503 get_ids(space, isl_dim_out, 0, space->n_out,
1504 ids + space->nparam);
1505 }
1506 space->n_in = space->n_out;
1507 if (ids) {
1508 free(space->ids);
1509 space->ids = ids;
1510 space->n_id = n_id;
1511 space = copy_ids(space, isl_dim_out, 0, space, isl_dim_in);
1512 }
1513 isl_id_free(space->tuple_id[0]);
1514 space->tuple_id[0] = isl_id_copy(space->tuple_id[1]);
1515 isl_space_free(space->nested[0]);
1516 space->nested[0] = isl_space_copy(space->nested[1]);
1517 return space;
1518 error:
1519 isl_space_free(space);
1520 return NULL;
1521 }
1522
1523 __isl_give isl_space *isl_space_map_from_domain_and_range(
1524 __isl_take isl_space *domain, __isl_take isl_space *range)
1525 {
1526 if (!domain || !range)
1527 goto error;
1528 if (!isl_space_is_set(domain))
1529 isl_die(isl_space_get_ctx(domain), isl_error_invalid,
1530 "domain is not a set space", goto error);
1531 if (!isl_space_is_set(range))
1532 isl_die(isl_space_get_ctx(range), isl_error_invalid,
1533 "range is not a set space", goto error);
1534 return isl_space_join(isl_space_reverse(domain), range);
1535 error:
1536 isl_space_free(domain);
1537 isl_space_free(range);
1538 return NULL;
1539 }
1540
1541 static __isl_give isl_space *set_ids(__isl_take isl_space *dim,
1542 enum isl_dim_type type,
1543 unsigned first, unsigned n, __isl_take isl_id **ids)
1544 {
1545 int i;
1546
1547 for (i = 0; i < n ; ++i)
1548 dim = set_id(dim, type, first + i, ids[i]);
1549
1550 return dim;
1551 }
1552
1553 __isl_give isl_space *isl_space_reverse(__isl_take isl_space *dim)
1554 {
1555 unsigned t;
1556 isl_space *nested;
1557 isl_id **ids = NULL;
1558 isl_id *id;
1559
1560 if (!dim)
1561 return NULL;
1562 if (match(dim, isl_dim_in, dim, isl_dim_out))
1563 return dim;
1564
1565 dim = isl_space_cow(dim);
1566 if (!dim)
1567 return NULL;
1568
1569 id = dim->tuple_id[0];
1570 dim->tuple_id[0] = dim->tuple_id[1];
1571 dim->tuple_id[1] = id;
1572
1573 nested = dim->nested[0];
1574 dim->nested[0] = dim->nested[1];
1575 dim->nested[1] = nested;
1576
1577 if (dim->ids) {
1578 int n_id = dim->n_in + dim->n_out;
1579 ids = isl_alloc_array(dim->ctx, isl_id *, n_id);
1580 if (n_id && !ids)
1581 goto error;
1582 get_ids(dim, isl_dim_in, 0, dim->n_in, ids);
1583 get_ids(dim, isl_dim_out, 0, dim->n_out, ids + dim->n_in);
1584 }
1585
1586 t = dim->n_in;
1587 dim->n_in = dim->n_out;
1588 dim->n_out = t;
1589
1590 if (dim->ids) {
1591 dim = set_ids(dim, isl_dim_out, 0, dim->n_out, ids);
1592 dim = set_ids(dim, isl_dim_in, 0, dim->n_in, ids + dim->n_out);
1593 free(ids);
1594 }
1595
1596 return dim;
1597 error:
1598 free(ids);
1599 isl_space_free(dim);
1600 return NULL;
1601 }
1602
1603 __isl_give isl_space *isl_space_drop_dims(__isl_take isl_space *dim,
1604 enum isl_dim_type type, unsigned first, unsigned num)
1605 {
1606 int i;
1607
1608 if (!dim)
1609 return NULL;
1610
1611 if (num == 0)
1612 return isl_space_reset(dim, type);
1613
1614 if (!valid_dim_type(type))
1615 isl_die(dim->ctx, isl_error_invalid,
1616 "cannot drop dimensions of specified type", goto error);
1617
1618 if (first + num > n(dim, type) || first + num < first)
1619 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1620 "index out of bounds", return isl_space_free(dim));
1621 dim = isl_space_cow(dim);
1622 if (!dim)
1623 goto error;
1624 if (dim->ids) {
1625 dim = extend_ids(dim);
1626 if (!dim)
1627 goto error;
1628 for (i = 0; i < num; ++i)
1629 isl_id_free(get_id(dim, type, first + i));
1630 for (i = first+num; i < n(dim, type); ++i)
1631 set_id(dim, type, i - num, get_id(dim, type, i));
1632 switch (type) {
1633 case isl_dim_param:
1634 get_ids(dim, isl_dim_in, 0, dim->n_in,
1635 dim->ids + offset(dim, isl_dim_in) - num);
1636 case isl_dim_in:
1637 get_ids(dim, isl_dim_out, 0, dim->n_out,
1638 dim->ids + offset(dim, isl_dim_out) - num);
1639 default:
1640 ;
1641 }
1642 dim->n_id -= num;
1643 }
1644 switch (type) {
1645 case isl_dim_param: dim->nparam -= num; break;
1646 case isl_dim_in: dim->n_in -= num; break;
1647 case isl_dim_out: dim->n_out -= num; break;
1648 default: ;
1649 }
1650 dim = isl_space_reset(dim, type);
1651 if (type == isl_dim_param) {
1652 if (dim && dim->nested[0] &&
1653 !(dim->nested[0] = isl_space_drop_dims(dim->nested[0],
1654 isl_dim_param, first, num)))
1655 goto error;
1656 if (dim && dim->nested[1] &&
1657 !(dim->nested[1] = isl_space_drop_dims(dim->nested[1],
1658 isl_dim_param, first, num)))
1659 goto error;
1660 }
1661 return dim;
1662 error:
1663 isl_space_free(dim);
1664 return NULL;
1665 }
1666
1667 __isl_give isl_space *isl_space_drop_inputs(__isl_take isl_space *dim,
1668 unsigned first, unsigned n)
1669 {
1670 if (!dim)
1671 return NULL;
1672 return isl_space_drop_dims(dim, isl_dim_in, first, n);
1673 }
1674
1675 __isl_give isl_space *isl_space_drop_outputs(__isl_take isl_space *dim,
1676 unsigned first, unsigned n)
1677 {
1678 if (!dim)
1679 return NULL;
1680 return isl_space_drop_dims(dim, isl_dim_out, first, n);
1681 }
1682
1683 __isl_give isl_space *isl_space_domain(__isl_take isl_space *dim)
1684 {
1685 if (!dim)
1686 return NULL;
1687 dim = isl_space_drop_outputs(dim, 0, dim->n_out);
1688 dim = isl_space_reverse(dim);
1689 dim = mark_as_set(dim);
1690 return dim;
1691 }
1692
1693 __isl_give isl_space *isl_space_from_domain(__isl_take isl_space *dim)
1694 {
1695 if (!dim)
1696 return NULL;
1697 if (!isl_space_is_set(dim))
1698 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1699 "not a set space", goto error);
1700 dim = isl_space_reverse(dim);
1701 dim = isl_space_reset(dim, isl_dim_out);
1702 return dim;
1703 error:
1704 isl_space_free(dim);
1705 return NULL;
1706 }
1707
1708 __isl_give isl_space *isl_space_range(__isl_take isl_space *dim)
1709 {
1710 if (!dim)
1711 return NULL;
1712 dim = isl_space_drop_inputs(dim, 0, dim->n_in);
1713 dim = mark_as_set(dim);
1714 return dim;
1715 }
1716
1717 __isl_give isl_space *isl_space_from_range(__isl_take isl_space *dim)
1718 {
1719 if (!dim)
1720 return NULL;
1721 if (!isl_space_is_set(dim))
1722 isl_die(isl_space_get_ctx(dim), isl_error_invalid,
1723 "not a set space", goto error);
1724 return isl_space_reset(dim, isl_dim_in);
1725 error:
1726 isl_space_free(dim);
1727 return NULL;
1728 }
1729
1730 /* Given a map space A -> B, return the map space [A -> B] -> A.
1731 */
1732 __isl_give isl_space *isl_space_domain_map(__isl_take isl_space *space)
1733 {
1734 isl_space *domain;
1735
1736 domain = isl_space_from_range(isl_space_domain(isl_space_copy(space)));
1737 space = isl_space_from_domain(isl_space_wrap(space));
1738 space = isl_space_join(space, domain);
1739
1740 return space;
1741 }
1742
1743 /* Given a map space A -> B, return the map space [A -> B] -> B.
1744 */
1745 __isl_give isl_space *isl_space_range_map(__isl_take isl_space *space)
1746 {
1747 isl_space *range;
1748
1749 range = isl_space_from_range(isl_space_range(isl_space_copy(space)));
1750 space = isl_space_from_domain(isl_space_wrap(space));
1751 space = isl_space_join(space, range);
1752
1753 return space;
1754 }
1755
1756 __isl_give isl_space *isl_space_params(__isl_take isl_space *space)
1757 {
1758 if (isl_space_is_params(space))
1759 return space;
1760 space = isl_space_drop_dims(space,
1761 isl_dim_in, 0, isl_space_dim(space, isl_dim_in));
1762 space = isl_space_drop_dims(space,
1763 isl_dim_out, 0, isl_space_dim(space, isl_dim_out));
1764 space = mark_as_params(space);
1765 return space;
1766 }
1767
1768 __isl_give isl_space *isl_space_set_from_params(__isl_take isl_space *space)
1769 {
1770 if (!space)
1771 return NULL;
1772 if (!isl_space_is_params(space))
1773 isl_die(isl_space_get_ctx(space), isl_error_invalid,
1774 "not a parameter space", goto error);
1775 return isl_space_reset(space, isl_dim_set);
1776 error:
1777 isl_space_free(space);
1778 return NULL;
1779 }
1780
1781 __isl_give isl_space *isl_space_as_set_space(__isl_take isl_space *dim)
1782 {
1783 dim = isl_space_cow(dim);
1784 if (!dim)
1785 return NULL;
1786
1787 dim->n_out += dim->n_in;
1788 dim->n_in = 0;
1789 dim = isl_space_reset(dim, isl_dim_in);
1790 dim = isl_space_reset(dim, isl_dim_out);
1791
1792 return dim;
1793 }
1794
1795 __isl_give isl_space *isl_space_underlying(__isl_take isl_space *dim,
1796 unsigned n_div)
1797 {
1798 int i;
1799
1800 if (!dim)
1801 return NULL;
1802 if (n_div == 0 &&
1803 dim->nparam == 0 && dim->n_in == 0 && dim->n_id == 0)
1804 return isl_space_reset(isl_space_reset(dim, isl_dim_in), isl_dim_out);
1805 dim = isl_space_cow(dim);
1806 if (!dim)
1807 return NULL;
1808 dim->n_out += dim->nparam + dim->n_in + n_div;
1809 dim->nparam = 0;
1810 dim->n_in = 0;
1811
1812 for (i = 0; i < dim->n_id; ++i)
1813 isl_id_free(get_id(dim, isl_dim_out, i));
1814 dim->n_id = 0;
1815 dim = isl_space_reset(dim, isl_dim_in);
1816 dim = isl_space_reset(dim, isl_dim_out);
1817
1818 return dim;
1819 }
1820
1821 /* Are the two spaces the same, including positions and names of parameters?
1822 */
1823 isl_bool isl_space_is_equal(__isl_keep isl_space *dim1,
1824 __isl_keep isl_space *dim2)
1825 {
1826 if (!dim1 || !dim2)
1827 return isl_bool_error;
1828 if (dim1 == dim2)
1829 return isl_bool_true;
1830 return match(dim1, isl_dim_param, dim2, isl_dim_param) &&
1831 isl_space_tuple_is_equal(dim1, isl_dim_in, dim2, isl_dim_in) &&
1832 isl_space_tuple_is_equal(dim1, isl_dim_out, dim2, isl_dim_out);
1833 }
1834
1835 /* Is space1 equal to the domain of space2?
1836 *
1837 * In the internal version we also allow space2 to be the space of a set,
1838 * provided space1 is a parameter space.
1839 */
1840 isl_bool isl_space_is_domain_internal(__isl_keep isl_space *space1,
1841 __isl_keep isl_space *space2)
1842 {
1843 if (!space1 || !space2)
1844 return isl_bool_error;
1845 if (!isl_space_is_set(space1))
1846 return isl_bool_false;
1847 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1848 isl_space_tuple_is_equal(space1, isl_dim_set,
1849 space2, isl_dim_in);
1850 }
1851
1852 /* Is space1 equal to the domain of space2?
1853 */
1854 isl_bool isl_space_is_domain(__isl_keep isl_space *space1,
1855 __isl_keep isl_space *space2)
1856 {
1857 if (!space2)
1858 return isl_bool_error;
1859 if (!isl_space_is_map(space2))
1860 return isl_bool_false;
1861 return isl_space_is_domain_internal(space1, space2);
1862 }
1863
1864 /* Is space1 equal to the range of space2?
1865 *
1866 * In the internal version, space2 is allowed to be the space of a set,
1867 * in which case it should be equal to space1.
1868 */
1869 isl_bool isl_space_is_range_internal(__isl_keep isl_space *space1,
1870 __isl_keep isl_space *space2)
1871 {
1872 if (!space1 || !space2)
1873 return isl_bool_error;
1874 if (!isl_space_is_set(space1))
1875 return isl_bool_false;
1876 return match(space1, isl_dim_param, space2, isl_dim_param) &&
1877 isl_space_tuple_is_equal(space1, isl_dim_set,
1878 space2, isl_dim_out);
1879 }
1880
1881 /* Is space1 equal to the range of space2?
1882 */
1883 isl_bool isl_space_is_range(__isl_keep isl_space *space1,
1884 __isl_keep isl_space *space2)
1885 {
1886 if (!space2)
1887 return isl_bool_error;
1888 if (!isl_space_is_map(space2))
1889 return isl_bool_false;
1890 return isl_space_is_range_internal(space1, space2);
1891 }
1892
1893 int isl_space_compatible_internal(__isl_keep isl_space *dim1,
1894 __isl_keep isl_space *dim2)
1895 {
1896 return dim1->nparam == dim2->nparam &&
1897 dim1->n_in + dim1->n_out == dim2->n_in + dim2->n_out;
1898 }
1899
1900 int isl_space_compatible(__isl_keep isl_space *space1,
1901 __isl_keep isl_space *space2)
1902 {
1903 return isl_space_compatible_internal(space1, space2);
1904 }
1905
1906 /* Update "hash" by hashing in "space".
1907 * Changes in this function should be reflected in isl_hash_space_domain.
1908 */
1909 static uint32_t isl_hash_space(uint32_t hash, __isl_keep isl_space *space)
1910 {
1911 int i;
1912 isl_id *id;
1913
1914 if (!space)
1915 return hash;
1916
1917 isl_hash_byte(hash, space->nparam % 256);
1918 isl_hash_byte(hash, space->n_in % 256);
1919 isl_hash_byte(hash, space->n_out % 256);
1920
1921 for (i = 0; i < space->nparam; ++i) {
1922 id = get_id(space, isl_dim_param, i);
1923 hash = isl_hash_id(hash, id);
1924 }
1925
1926 id = tuple_id(space, isl_dim_in);
1927 hash = isl_hash_id(hash, id);
1928 id = tuple_id(space, isl_dim_out);
1929 hash = isl_hash_id(hash, id);
1930
1931 hash = isl_hash_space(hash, space->nested[0]);
1932 hash = isl_hash_space(hash, space->nested[1]);
1933
1934 return hash;
1935 }
1936
1937 /* Update "hash" by hashing in the domain of "space".
1938 * The result of this function is equal to the result of applying
1939 * isl_hash_space to the domain of "space".
1940 */
1941 static uint32_t isl_hash_space_domain(uint32_t hash,
1942 __isl_keep isl_space *space)
1943 {
1944 int i;
1945 isl_id *id;
1946
1947 if (!space)
1948 return hash;
1949
1950 isl_hash_byte(hash, space->nparam % 256);
1951 isl_hash_byte(hash, 0);
1952 isl_hash_byte(hash, space->n_in % 256);
1953
1954 for (i = 0; i < space->nparam; ++i) {
1955 id = get_id(space, isl_dim_param, i);
1956 hash = isl_hash_id(hash, id);
1957 }
1958
1959 hash = isl_hash_id(hash, &isl_id_none);
1960 id = tuple_id(space, isl_dim_in);
1961 hash = isl_hash_id(hash, id);
1962
1963 hash = isl_hash_space(hash, space->nested[0]);
1964
1965 return hash;
1966 }
1967
1968 uint32_t isl_space_get_hash(__isl_keep isl_space *dim)
1969 {
1970 uint32_t hash;
1971
1972 if (!dim)
1973 return 0;
1974
1975 hash = isl_hash_init();
1976 hash = isl_hash_space(hash, dim);
1977
1978 return hash;
1979 }
1980
1981 /* Return the hash value of the domain of "space".
1982 * That is, isl_space_get_domain_hash(space) is equal to
1983 * isl_space_get_hash(isl_space_domain(space)).
1984 */
1985 uint32_t isl_space_get_domain_hash(__isl_keep isl_space *space)
1986 {
1987 uint32_t hash;
1988
1989 if (!space)
1990 return 0;
1991
1992 hash = isl_hash_init();
1993 hash = isl_hash_space_domain(hash, space);
1994
1995 return hash;
1996 }
1997
1998 isl_bool isl_space_is_wrapping(__isl_keep isl_space *dim)
1999 {
2000 if (!dim)
2001 return isl_bool_error;
2002
2003 if (!isl_space_is_set(dim))
2004 return isl_bool_false;
2005
2006 return dim->nested[1] != NULL;
2007 }
2008
2009 /* Is "space" the space of a map where the domain is a wrapped map space?
2010 */
2011 isl_bool isl_space_domain_is_wrapping(__isl_keep isl_space *space)
2012 {
2013 if (!space)
2014 return isl_bool_error;
2015
2016 if (isl_space_is_set(space))
2017 return isl_bool_false;
2018
2019 return space->nested[0] != NULL;
2020 }
2021
2022 /* Is "space" the space of a map where the range is a wrapped map space?
2023 */
2024 isl_bool isl_space_range_is_wrapping(__isl_keep isl_space *space)
2025 {
2026 if (!space)
2027 return isl_bool_error;
2028
2029 if (isl_space_is_set(space))
2030 return isl_bool_false;
2031
2032 return space->nested[1] != NULL;
2033 }
2034
2035 __isl_give isl_space *isl_space_wrap(__isl_take isl_space *dim)
2036 {
2037 isl_space *wrap;
2038
2039 if (!dim)
2040 return NULL;
2041
2042 wrap = isl_space_set_alloc(dim->ctx,
2043 dim->nparam, dim->n_in + dim->n_out);
2044
2045 wrap = copy_ids(wrap, isl_dim_param, 0, dim, isl_dim_param);
2046 wrap = copy_ids(wrap, isl_dim_set, 0, dim, isl_dim_in);
2047 wrap = copy_ids(wrap, isl_dim_set, dim->n_in, dim, isl_dim_out);
2048
2049 if (!wrap)
2050 goto error;
2051
2052 wrap->nested[1] = dim;
2053
2054 return wrap;
2055 error:
2056 isl_space_free(dim);
2057 return NULL;
2058 }
2059
2060 __isl_give isl_space *isl_space_unwrap(__isl_take isl_space *dim)
2061 {
2062 isl_space *unwrap;
2063
2064 if (!dim)
2065 return NULL;
2066
2067 if (!isl_space_is_wrapping(dim))
2068 isl_die(dim->ctx, isl_error_invalid, "not a wrapping space",
2069 goto error);
2070
2071 unwrap = isl_space_copy(dim->nested[1]);
2072 isl_space_free(dim);
2073
2074 return unwrap;
2075 error:
2076 isl_space_free(dim);
2077 return NULL;
2078 }
2079
2080 int isl_space_is_named_or_nested(__isl_keep isl_space *dim, enum isl_dim_type type)
2081 {
2082 if (type != isl_dim_in && type != isl_dim_out)
2083 return 0;
2084 if (!dim)
2085 return -1;
2086 if (dim->tuple_id[type - isl_dim_in])
2087 return 1;
2088 if (dim->nested[type - isl_dim_in])
2089 return 1;
2090 return 0;
2091 }
2092
2093 int isl_space_may_be_set(__isl_keep isl_space *dim)
2094 {
2095 if (!dim)
2096 return -1;
2097 if (isl_space_is_set(dim))
2098 return 1;
2099 if (isl_space_dim(dim, isl_dim_in) != 0)
2100 return 0;
2101 if (isl_space_is_named_or_nested(dim, isl_dim_in))
2102 return 0;
2103 return 1;
2104 }
2105
2106 __isl_give isl_space *isl_space_reset(__isl_take isl_space *dim,
2107 enum isl_dim_type type)
2108 {
2109 if (!isl_space_is_named_or_nested(dim, type))
2110 return dim;
2111
2112 dim = isl_space_cow(dim);
2113 if (!dim)
2114 return NULL;
2115
2116 isl_id_free(dim->tuple_id[type - isl_dim_in]);
2117 dim->tuple_id[type - isl_dim_in] = NULL;
2118 isl_space_free(dim->nested[type - isl_dim_in]);
2119 dim->nested[type - isl_dim_in] = NULL;
2120
2121 return dim;
2122 }
2123
2124 __isl_give isl_space *isl_space_flatten(__isl_take isl_space *dim)
2125 {
2126 if (!dim)
2127 return NULL;
2128 if (!dim->nested[0] && !dim->nested[1])
2129 return dim;
2130
2131 if (dim->nested[0])
2132 dim = isl_space_reset(dim, isl_dim_in);
2133 if (dim && dim->nested[1])
2134 dim = isl_space_reset(dim, isl_dim_out);
2135
2136 return dim;
2137 }
2138
2139 __isl_give isl_space *isl_space_flatten_domain(__isl_take isl_space *dim)
2140 {
2141 if (!dim)
2142 return NULL;
2143 if (!dim->nested[0])
2144 return dim;
2145
2146 return isl_space_reset(dim, isl_dim_in);
2147 }
2148
2149 __isl_give isl_space *isl_space_flatten_range(__isl_take isl_space *dim)
2150 {
2151 if (!dim)
2152 return NULL;
2153 if (!dim->nested[1])
2154 return dim;
2155
2156 return isl_space_reset(dim, isl_dim_out);
2157 }
2158
2159 /* Replace the dimensions of the given type of dst by those of src.
2160 */
2161 __isl_give isl_space *isl_space_replace(__isl_take isl_space *dst,
2162 enum isl_dim_type type, __isl_keep isl_space *src)
2163 {
2164 dst = isl_space_cow(dst);
2165
2166 if (!dst || !src)
2167 goto error;
2168
2169 dst = isl_space_drop_dims(dst, type, 0, isl_space_dim(dst, type));
2170 dst = isl_space_add_dims(dst, type, isl_space_dim(src, type));
2171 dst = copy_ids(dst, type, 0, src, type);
2172
2173 if (dst && type == isl_dim_param) {
2174 int i;
2175 for (i = 0; i <= 1; ++i) {
2176 if (!dst->nested[i])
2177 continue;
2178 dst->nested[i] = isl_space_replace(dst->nested[i],
2179 type, src);
2180 if (!dst->nested[i])
2181 goto error;
2182 }
2183 }
2184
2185 return dst;
2186 error:
2187 isl_space_free(dst);
2188 return NULL;
2189 }
2190
2191 /* Given a dimension specification "dim" of a set, create a dimension
2192 * specification for the lift of the set. In particular, the result
2193 * is of the form [dim -> local[..]], with n_local variables in the
2194 * range of the wrapped map.
2195 */
2196 __isl_give isl_space *isl_space_lift(__isl_take isl_space *dim, unsigned n_local)
2197 {
2198 isl_space *local_dim;
2199
2200 if (!dim)
2201 return NULL;
2202
2203 local_dim = isl_space_dup(dim);
2204 local_dim = isl_space_drop_dims(local_dim, isl_dim_set, 0, dim->n_out);
2205 local_dim = isl_space_add_dims(local_dim, isl_dim_set, n_local);
2206 local_dim = isl_space_set_tuple_name(local_dim, isl_dim_set, "local");
2207 dim = isl_space_join(isl_space_from_domain(dim),
2208 isl_space_from_range(local_dim));
2209 dim = isl_space_wrap(dim);
2210 dim = isl_space_set_tuple_name(dim, isl_dim_set, "lifted");
2211
2212 return dim;
2213 }
2214
2215 isl_bool isl_space_can_zip(__isl_keep isl_space *dim)
2216 {
2217 if (!dim)
2218 return isl_bool_error;
2219
2220 return dim->nested[0] && dim->nested[1];
2221 }
2222
2223 __isl_give isl_space *isl_space_zip(__isl_take isl_space *dim)
2224 {
2225 isl_space *dom, *ran;
2226 isl_space *dom_dom, *dom_ran, *ran_dom, *ran_ran;
2227
2228 if (!isl_space_can_zip(dim))
2229 isl_die(dim->ctx, isl_error_invalid, "dim cannot be zipped",
2230 goto error);
2231
2232 if (!dim)
2233 return NULL;
2234 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(dim)));
2235 ran = isl_space_unwrap(isl_space_range(dim));
2236 dom_dom = isl_space_domain(isl_space_copy(dom));
2237 dom_ran = isl_space_range(dom);
2238 ran_dom = isl_space_domain(isl_space_copy(ran));
2239 ran_ran = isl_space_range(ran);
2240 dom = isl_space_join(isl_space_from_domain(dom_dom),
2241 isl_space_from_range(ran_dom));
2242 ran = isl_space_join(isl_space_from_domain(dom_ran),
2243 isl_space_from_range(ran_ran));
2244 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2245 isl_space_from_range(isl_space_wrap(ran)));
2246 error:
2247 isl_space_free(dim);
2248 return NULL;
2249 }
2250
2251 /* Can we apply isl_space_curry to "space"?
2252 * That is, does it have a nested relation in its domain?
2253 */
2254 isl_bool isl_space_can_curry(__isl_keep isl_space *space)
2255 {
2256 if (!space)
2257 return isl_bool_error;
2258
2259 return !!space->nested[0];
2260 }
2261
2262 /* Given a space (A -> B) -> C, return the corresponding space
2263 * A -> (B -> C).
2264 */
2265 __isl_give isl_space *isl_space_curry(__isl_take isl_space *space)
2266 {
2267 isl_space *dom, *ran;
2268 isl_space *dom_dom, *dom_ran;
2269
2270 if (!space)
2271 return NULL;
2272
2273 if (!isl_space_can_curry(space))
2274 isl_die(space->ctx, isl_error_invalid,
2275 "space cannot be curried", goto error);
2276
2277 dom = isl_space_unwrap(isl_space_domain(isl_space_copy(space)));
2278 ran = isl_space_range(space);
2279 dom_dom = isl_space_domain(isl_space_copy(dom));
2280 dom_ran = isl_space_range(dom);
2281 ran = isl_space_join(isl_space_from_domain(dom_ran),
2282 isl_space_from_range(ran));
2283 return isl_space_join(isl_space_from_domain(dom_dom),
2284 isl_space_from_range(isl_space_wrap(ran)));
2285 error:
2286 isl_space_free(space);
2287 return NULL;
2288 }
2289
2290 /* Can isl_space_range_curry be applied to "space"?
2291 * That is, does it have a nested relation in its range,
2292 * the domain of which is itself a nested relation?
2293 */
2294 isl_bool isl_space_can_range_curry(__isl_keep isl_space *space)
2295 {
2296 isl_bool can;
2297
2298 if (!space)
2299 return isl_bool_error;
2300 can = isl_space_range_is_wrapping(space);
2301 if (can < 0 || !can)
2302 return can;
2303 return isl_space_can_curry(space->nested[1]);
2304 }
2305
2306 /* Given a space A -> ((B -> C) -> D), return the corresponding space
2307 * A -> (B -> (C -> D)).
2308 */
2309 __isl_give isl_space *isl_space_range_curry(__isl_take isl_space *space)
2310 {
2311 if (!space)
2312 return NULL;
2313
2314 if (!isl_space_can_range_curry(space))
2315 isl_die(isl_space_get_ctx(space), isl_error_invalid,
2316 "space range cannot be curried",
2317 return isl_space_free(space));
2318
2319 space = isl_space_cow(space);
2320 if (!space)
2321 return NULL;
2322 space->nested[1] = isl_space_curry(space->nested[1]);
2323 if (!space->nested[1])
2324 return isl_space_free(space);
2325
2326 return space;
2327 }
2328
2329 /* Can we apply isl_space_uncurry to "space"?
2330 * That is, does it have a nested relation in its range?
2331 */
2332 isl_bool isl_space_can_uncurry(__isl_keep isl_space *space)
2333 {
2334 if (!space)
2335 return isl_bool_error;
2336
2337 return !!space->nested[1];
2338 }
2339
2340 /* Given a space A -> (B -> C), return the corresponding space
2341 * (A -> B) -> C.
2342 */
2343 __isl_give isl_space *isl_space_uncurry(__isl_take isl_space *space)
2344 {
2345 isl_space *dom, *ran;
2346 isl_space *ran_dom, *ran_ran;
2347
2348 if (!space)
2349 return NULL;
2350
2351 if (!isl_space_can_uncurry(space))
2352 isl_die(space->ctx, isl_error_invalid,
2353 "space cannot be uncurried",
2354 return isl_space_free(space));
2355
2356 dom = isl_space_domain(isl_space_copy(space));
2357 ran = isl_space_unwrap(isl_space_range(space));
2358 ran_dom = isl_space_domain(isl_space_copy(ran));
2359 ran_ran = isl_space_range(ran);
2360 dom = isl_space_join(isl_space_from_domain(dom),
2361 isl_space_from_range(ran_dom));
2362 return isl_space_join(isl_space_from_domain(isl_space_wrap(dom)),
2363 isl_space_from_range(ran_ran));
2364 }
2365
2366 int isl_space_has_named_params(__isl_keep isl_space *dim)
2367 {
2368 int i;
2369 unsigned off;
2370
2371 if (!dim)
2372 return -1;
2373 if (dim->nparam == 0)
2374 return 1;
2375 off = isl_space_offset(dim, isl_dim_param);
2376 if (off + dim->nparam > dim->n_id)
2377 return 0;
2378 for (i = 0; i < dim->nparam; ++i)
2379 if (!dim->ids[off + i])
2380 return 0;
2381 return 1;
2382 }
2383
2384 /* Align the initial parameters of dim1 to match the order in dim2.
2385 */
2386 __isl_give isl_space *isl_space_align_params(__isl_take isl_space *dim1,
2387 __isl_take isl_space *dim2)
2388 {
2389 isl_reordering *exp;
2390
2391 if (!isl_space_has_named_params(dim1) || !isl_space_has_named_params(dim2))
2392 isl_die(isl_space_get_ctx(dim1), isl_error_invalid,
2393 "parameter alignment requires named parameters",
2394 goto error);
2395
2396 dim2 = isl_space_params(dim2);
2397 exp = isl_parameter_alignment_reordering(dim1, dim2);
2398 exp = isl_reordering_extend_space(exp, dim1);
2399 isl_space_free(dim2);
2400 if (!exp)
2401 return NULL;
2402 dim1 = isl_space_copy(exp->dim);
2403 isl_reordering_free(exp);
2404 return dim1;
2405 error:
2406 isl_space_free(dim1);
2407 isl_space_free(dim2);
2408 return NULL;
2409 }
2410
2411 /* Given the space of set (domain), construct a space for a map
2412 * with as domain the given space and as range the range of "model".
2413 */
2414 __isl_give isl_space *isl_space_extend_domain_with_range(
2415 __isl_take isl_space *space, __isl_take isl_space *model)
2416 {
2417 if (!model)
2418 goto error;
2419
2420 space = isl_space_from_domain(space);
2421 space = isl_space_add_dims(space, isl_dim_out,
2422 isl_space_dim(model, isl_dim_out));
2423 if (isl_space_has_tuple_id(model, isl_dim_out))
2424 space = isl_space_set_tuple_id(space, isl_dim_out,
2425 isl_space_get_tuple_id(model, isl_dim_out));
2426 if (!space)
2427 goto error;
2428 if (model->nested[1]) {
2429 isl_space *nested = isl_space_copy(model->nested[1]);
2430 int n_nested, n_space;
2431 nested = isl_space_align_params(nested, isl_space_copy(space));
2432 n_nested = isl_space_dim(nested, isl_dim_param);
2433 n_space = isl_space_dim(space, isl_dim_param);
2434 if (n_nested > n_space)
2435 nested = isl_space_drop_dims(nested, isl_dim_param,
2436 n_space, n_nested - n_space);
2437 if (!nested)
2438 goto error;
2439 space->nested[1] = nested;
2440 }
2441 isl_space_free(model);
2442 return space;
2443 error:
2444 isl_space_free(model);
2445 isl_space_free(space);
2446 return NULL;
2447 }
2448
2449 /* Compare the "type" dimensions of two isl_spaces.
2450 *
2451 * The order is fairly arbitrary.
2452 */
2453 static int isl_space_cmp_type(__isl_keep isl_space *space1,
2454 __isl_keep isl_space *space2, enum isl_dim_type type)
2455 {
2456 int cmp;
2457 isl_space *nested1, *nested2;
2458
2459 if (isl_space_dim(space1, type) != isl_space_dim(space2, type))
2460 return isl_space_dim(space1, type) -
2461 isl_space_dim(space2, type);
2462
2463 cmp = isl_id_cmp(tuple_id(space1, type), tuple_id(space2, type));
2464 if (cmp != 0)
2465 return cmp;
2466
2467 nested1 = nested(space1, type);
2468 nested2 = nested(space2, type);
2469 if (!nested1 != !nested2)
2470 return !nested1 - !nested2;
2471
2472 if (nested1)
2473 return isl_space_cmp(nested1, nested2);
2474
2475 return 0;
2476 }
2477
2478 /* Compare two isl_spaces.
2479 *
2480 * The order is fairly arbitrary.
2481 */
2482 int isl_space_cmp(__isl_keep isl_space *space1, __isl_keep isl_space *space2)
2483 {
2484 int i;
2485 int cmp;
2486
2487 if (space1 == space2)
2488 return 0;
2489 if (!space1)
2490 return -1;
2491 if (!space2)
2492 return 1;
2493
2494 cmp = isl_space_cmp_type(space1, space2, isl_dim_param);
2495 if (cmp != 0)
2496 return cmp;
2497 cmp = isl_space_cmp_type(space1, space2, isl_dim_in);
2498 if (cmp != 0)
2499 return cmp;
2500 cmp = isl_space_cmp_type(space1, space2, isl_dim_out);
2501 if (cmp != 0)
2502 return cmp;
2503
2504 if (!space1->ids && !space2->ids)
2505 return 0;
2506
2507 for (i = 0; i < n(space1, isl_dim_param); ++i) {
2508 cmp = isl_id_cmp(get_id(space1, isl_dim_param, i),
2509 get_id(space2, isl_dim_param, i));
2510 if (cmp != 0)
2511 return cmp;
2512 }
2513
2514 return 0;
2515 }
Integer set library