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isl_access_info: change interface for specifying restrictions
[isl.git] / isl_pw_templ.c
blob6a941c513c4b7483647633002d7ed9ac975aab0f
1 #define xFN(TYPE,NAME) TYPE ## _ ## NAME
2 #define FN(TYPE,NAME) xFN(TYPE,NAME)
3 #define xS(TYPE,NAME) struct TYPE ## _ ## NAME
4 #define S(TYPE,NAME) xS(TYPE,NAME)
5
6 #ifdef HAS_TYPE
7 __isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim,
8 enum isl_fold type, int n)
9 #else
10 __isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim, int n)
11 #endif
12 {
13 isl_ctx *ctx;
14 struct PW *pw;
15
16 if (!dim)
17 return NULL;
18 ctx = isl_space_get_ctx(dim);
19 isl_assert(ctx, n >= 0, goto error);
20 pw = isl_alloc(ctx, struct PW,
21 sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
22 if (!pw)
23 goto error;
24
25 pw->ref = 1;
26 #ifdef HAS_TYPE
27 pw->type = type;
28 #endif
29 pw->size = n;
30 pw->n = 0;
31 pw->dim = dim;
32 return pw;
33 error:
34 isl_space_free(dim);
35 return NULL;
36 }
37
38 #ifdef HAS_TYPE
39 __isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim, enum isl_fold type)
40 {
41 return FN(PW,alloc_size)(dim, type, 0);
42 }
43 #else
44 __isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim)
45 {
46 return FN(PW,alloc_size)(dim, 0);
47 }
48 #endif
49
50 __isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
51 __isl_take isl_set *set, __isl_take EL *el)
52 {
53 isl_ctx *ctx;
54 isl_space *el_dim = NULL;
55
56 if (!pw || !set || !el)
57 goto error;
58
59 if (isl_set_plain_is_empty(set) || FN(EL,EL_IS_ZERO)(el)) {
60 isl_set_free(set);
61 FN(EL,free)(el);
62 return pw;
63 }
64
65 ctx = isl_set_get_ctx(set);
66 #ifdef HAS_TYPE
67 if (pw->type != el->type)
68 isl_die(ctx, isl_error_invalid, "fold types don't match",
69 goto error);
70 #endif
71 el_dim = FN(EL,get_space(el));
72 isl_assert(ctx, isl_space_is_equal(pw->dim, el_dim), goto error);
73 isl_assert(ctx, pw->n < pw->size, goto error);
74
75 pw->p[pw->n].set = set;
76 pw->p[pw->n].FIELD = el;
77 pw->n++;
78
79 isl_space_free(el_dim);
80 return pw;
81 error:
82 isl_space_free(el_dim);
83 FN(PW,free)(pw);
84 isl_set_free(set);
85 FN(EL,free)(el);
86 return NULL;
87 }
88
89 #ifdef HAS_TYPE
90 __isl_give PW *FN(PW,alloc)(enum isl_fold type,
91 __isl_take isl_set *set, __isl_take EL *el)
92 #else
93 __isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
94 #endif
95 {
96 PW *pw;
97
98 if (!set || !el)
99 goto error;
100
101 #ifdef HAS_TYPE
102 pw = FN(PW,alloc_size)(FN(EL,get_space)(el), type, 1);
103 #else
104 pw = FN(PW,alloc_size)(FN(EL,get_space)(el), 1);
105 #endif
106
107 return FN(PW,add_piece)(pw, set, el);
108 error:
109 isl_set_free(set);
110 FN(EL,free)(el);
111 return NULL;
112 }
113
114 __isl_give PW *FN(PW,dup)(__isl_keep PW *pw)
115 {
116 int i;
117 PW *dup;
118
119 if (!pw)
120 return NULL;
121
122 #ifdef HAS_TYPE
123 dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, pw->n);
124 #else
125 dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->n);
126 #endif
127 if (!dup)
128 return NULL;
129
130 for (i = 0; i < pw->n; ++i)
131 dup = FN(PW,add_piece)(dup, isl_set_copy(pw->p[i].set),
132 FN(EL,copy)(pw->p[i].FIELD));
133
134 return dup;
135 }
136
137 __isl_give PW *FN(PW,cow)(__isl_take PW *pw)
138 {
139 if (!pw)
140 return NULL;
141
142 if (pw->ref == 1)
143 return pw;
144 pw->ref--;
145 return FN(PW,dup)(pw);
146 }
147
148 __isl_give PW *FN(PW,copy)(__isl_keep PW *pw)
149 {
150 if (!pw)
151 return NULL;
152
153 pw->ref++;
154 return pw;
155 }
156
157 void *FN(PW,free)(__isl_take PW *pw)
158 {
159 int i;
160
161 if (!pw)
162 return NULL;
163 if (--pw->ref > 0)
164 return NULL;
165
166 for (i = 0; i < pw->n; ++i) {
167 isl_set_free(pw->p[i].set);
168 FN(EL,free)(pw->p[i].FIELD);
169 }
170 isl_space_free(pw->dim);
171 free(pw);
172
173 return NULL;
174 }
175
176 const char *FN(PW,get_dim_name)(__isl_keep PW *pw, enum isl_dim_type type,
177 unsigned pos)
178 {
179 return pw ? isl_space_get_dim_name(pw->dim, type, pos) : NULL;
180 }
181
182 int FN(PW,has_dim_id)(__isl_keep PW *pw, enum isl_dim_type type, unsigned pos)
183 {
184 return pw ? isl_space_has_dim_id(pw->dim, type, pos) : -1;
185 }
186
187 __isl_give isl_id *FN(PW,get_dim_id)(__isl_keep PW *pw, enum isl_dim_type type,
188 unsigned pos)
189 {
190 return pw ? isl_space_get_dim_id(pw->dim, type, pos) : NULL;
191 }
192
193 const char *FN(PW,get_tuple_name)(__isl_keep PW *pw, enum isl_dim_type type)
194 {
195 return pw ? isl_space_get_tuple_name(pw->dim, type) : NULL;
196 }
197
198 int FN(PW,has_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
199 {
200 return pw ? isl_space_has_tuple_id(pw->dim, type) : -1;
201 }
202
203 __isl_give isl_id *FN(PW,get_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
204 {
205 return pw ? isl_space_get_tuple_id(pw->dim, type) : NULL;
206 }
207
208 int FN(PW,IS_ZERO)(__isl_keep PW *pw)
209 {
210 if (!pw)
211 return -1;
212
213 return pw->n == 0;
214 }
215
216 #ifndef NO_REALIGN
217 __isl_give PW *FN(PW,realign_domain)(__isl_take PW *pw,
218 __isl_take isl_reordering *exp)
219 {
220 int i;
221
222 pw = FN(PW,cow)(pw);
223 if (!pw || !exp)
224 return NULL;
225
226 for (i = 0; i < pw->n; ++i) {
227 pw->p[i].set = isl_set_realign(pw->p[i].set,
228 isl_reordering_copy(exp));
229 if (!pw->p[i].set)
230 goto error;
231 pw->p[i].FIELD = FN(EL,realign_domain)(pw->p[i].FIELD,
232 isl_reordering_copy(exp));
233 if (!pw->p[i].FIELD)
234 goto error;
235 }
236
237 pw = FN(PW,reset_domain_space)(pw, isl_space_copy(exp->dim));
238
239 isl_reordering_free(exp);
240 return pw;
241 error:
242 isl_reordering_free(exp);
243 FN(PW,free)(pw);
244 return NULL;
245 }
246
247 /* Align the parameters of "pw" to those of "model".
248 */
249 __isl_give PW *FN(PW,align_params)(__isl_take PW *pw, __isl_take isl_space *model)
250 {
251 isl_ctx *ctx;
252
253 if (!pw || !model)
254 goto error;
255
256 ctx = isl_space_get_ctx(model);
257 if (!isl_space_has_named_params(model))
258 isl_die(ctx, isl_error_invalid,
259 "model has unnamed parameters", goto error);
260 if (!isl_space_has_named_params(pw->dim))
261 isl_die(ctx, isl_error_invalid,
262 "input has unnamed parameters", goto error);
263 if (!isl_space_match(pw->dim, isl_dim_param, model, isl_dim_param)) {
264 isl_reordering *exp;
265
266 model = isl_space_drop_dims(model, isl_dim_in,
267 0, isl_space_dim(model, isl_dim_in));
268 model = isl_space_drop_dims(model, isl_dim_out,
269 0, isl_space_dim(model, isl_dim_out));
270 exp = isl_parameter_alignment_reordering(pw->dim, model);
271 exp = isl_reordering_extend_space(exp,
272 FN(PW,get_domain_space)(pw));
273 pw = FN(PW,realign_domain)(pw, exp);
274 }
275
276 isl_space_free(model);
277 return pw;
278 error:
279 isl_space_free(model);
280 FN(PW,free)(pw);
281 return NULL;
282 }
283
284 static __isl_give PW *FN(PW,align_params_pw_pw_and)(__isl_take PW *pw1,
285 __isl_take PW *pw2,
286 __isl_give PW *(*fn)(__isl_take PW *pw1, __isl_take PW *pw2))
287 {
288 isl_ctx *ctx;
289
290 if (!pw1 || !pw2)
291 goto error;
292 if (isl_space_match(pw1->dim, isl_dim_param, pw2->dim, isl_dim_param))
293 return fn(pw1, pw2);
294 ctx = FN(PW,get_ctx)(pw1);
295 if (!isl_space_has_named_params(pw1->dim) ||
296 !isl_space_has_named_params(pw2->dim))
297 isl_die(ctx, isl_error_invalid,
298 "unaligned unnamed parameters", goto error);
299 pw1 = FN(PW,align_params)(pw1, FN(PW,get_space)(pw2));
300 pw2 = FN(PW,align_params)(pw2, FN(PW,get_space)(pw1));
301 return fn(pw1, pw2);
302 error:
303 FN(PW,free)(pw1);
304 FN(PW,free)(pw2);
305 return NULL;
306 }
307
308 static __isl_give PW *FN(PW,align_params_pw_set_and)(__isl_take PW *pw,
309 __isl_take isl_set *set,
310 __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_set *set))
311 {
312 isl_ctx *ctx;
313
314 if (!pw || !set)
315 goto error;
316 if (isl_space_match(pw->dim, isl_dim_param, set->dim, isl_dim_param))
317 return fn(pw, set);
318 ctx = FN(PW,get_ctx)(pw);
319 if (!isl_space_has_named_params(pw->dim) ||
320 !isl_space_has_named_params(set->dim))
321 isl_die(ctx, isl_error_invalid,
322 "unaligned unnamed parameters", goto error);
323 pw = FN(PW,align_params)(pw, isl_set_get_space(set));
324 set = isl_set_align_params(set, FN(PW,get_space)(pw));
325 return fn(pw, set);
326 error:
327 FN(PW,free)(pw);
328 isl_set_free(set);
329 return NULL;
330 }
331 #endif
332
333 static __isl_give PW *FN(PW,union_add_aligned)(__isl_take PW *pw1,
334 __isl_take PW *pw2)
335 {
336 int i, j, n;
337 struct PW *res;
338 isl_ctx *ctx;
339 isl_set *set;
340
341 if (!pw1 || !pw2)
342 goto error;
343
344 ctx = isl_space_get_ctx(pw1->dim);
345 #ifdef HAS_TYPE
346 if (pw1->type != pw2->type)
347 isl_die(ctx, isl_error_invalid,
348 "fold types don't match", goto error);
349 #endif
350 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
351
352 if (FN(PW,IS_ZERO)(pw1)) {
353 FN(PW,free)(pw1);
354 return pw2;
355 }
356
357 if (FN(PW,IS_ZERO)(pw2)) {
358 FN(PW,free)(pw2);
359 return pw1;
360 }
361
362 n = (pw1->n + 1) * (pw2->n + 1);
363 #ifdef HAS_TYPE
364 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
365 #else
366 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
367 #endif
368
369 for (i = 0; i < pw1->n; ++i) {
370 set = isl_set_copy(pw1->p[i].set);
371 for (j = 0; j < pw2->n; ++j) {
372 struct isl_set *common;
373 EL *sum;
374 common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
375 isl_set_copy(pw2->p[j].set));
376 if (isl_set_plain_is_empty(common)) {
377 isl_set_free(common);
378 continue;
379 }
380 set = isl_set_subtract(set,
381 isl_set_copy(pw2->p[j].set));
382
383 sum = FN(EL,add_on_domain)(common,
384 FN(EL,copy)(pw1->p[i].FIELD),
385 FN(EL,copy)(pw2->p[j].FIELD));
386
387 res = FN(PW,add_piece)(res, common, sum);
388 }
389 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
390 }
391
392 for (j = 0; j < pw2->n; ++j) {
393 set = isl_set_copy(pw2->p[j].set);
394 for (i = 0; i < pw1->n; ++i)
395 set = isl_set_subtract(set,
396 isl_set_copy(pw1->p[i].set));
397 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
398 }
399
400 FN(PW,free)(pw1);
401 FN(PW,free)(pw2);
402
403 return res;
404 error:
405 FN(PW,free)(pw1);
406 FN(PW,free)(pw2);
407 return NULL;
408 }
409
410 /* Private version of "union_add". For isl_pw_qpolynomial and
411 * isl_pw_qpolynomial_fold, we prefer to simply call it "add".
412 */
413 static __isl_give PW *FN(PW,union_add_)(__isl_take PW *pw1, __isl_take PW *pw2)
414 {
415 return FN(PW,align_params_pw_pw_and)(pw1, pw2,
416 &FN(PW,union_add_aligned));
417 }
418
419 /* Make sure "pw" has room for at least "n" more pieces.
420 *
421 * If there is only one reference to pw, we extend it in place.
422 * Otherwise, we create a new PW and copy the pieces.
423 */
424 static __isl_give PW *FN(PW,grow)(__isl_take PW *pw, int n)
425 {
426 int i;
427 isl_ctx *ctx;
428 PW *res;
429
430 if (!pw)
431 return NULL;
432 if (pw->n + n <= pw->size)
433 return pw;
434 ctx = FN(PW,get_ctx)(pw);
435 n += pw->n;
436 if (pw->ref == 1) {
437 res = isl_realloc(ctx, pw, struct PW,
438 sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
439 if (!res)
440 return FN(PW,free)(pw);
441 res->size = n;
442 return res;
443 }
444 #ifdef HAS_TYPE
445 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, n);
446 #else
447 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), n);
448 #endif
449 if (!res)
450 return FN(PW,free)(pw);
451 for (i = 0; i < pw->n; ++i)
452 res = FN(PW,add_piece)(res, isl_set_copy(pw->p[i].set),
453 FN(EL,copy)(pw->p[i].FIELD));
454 FN(PW,free)(pw);
455 return res;
456 }
457
458 static __isl_give PW *FN(PW,add_disjoint_aligned)(__isl_take PW *pw1,
459 __isl_take PW *pw2)
460 {
461 int i;
462 isl_ctx *ctx;
463
464 if (!pw1 || !pw2)
465 goto error;
466
467 if (pw1->size < pw1->n + pw2->n && pw1->n < pw2->n)
468 return FN(PW,add_disjoint_aligned)(pw2, pw1);
469
470 ctx = isl_space_get_ctx(pw1->dim);
471 #ifdef HAS_TYPE
472 if (pw1->type != pw2->type)
473 isl_die(ctx, isl_error_invalid,
474 "fold types don't match", goto error);
475 #endif
476 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
477
478 if (FN(PW,IS_ZERO)(pw1)) {
479 FN(PW,free)(pw1);
480 return pw2;
481 }
482
483 if (FN(PW,IS_ZERO)(pw2)) {
484 FN(PW,free)(pw2);
485 return pw1;
486 }
487
488 pw1 = FN(PW,grow)(pw1, pw2->n);
489 if (!pw1)
490 goto error;
491
492 for (i = 0; i < pw2->n; ++i)
493 pw1 = FN(PW,add_piece)(pw1,
494 isl_set_copy(pw2->p[i].set),
495 FN(EL,copy)(pw2->p[i].FIELD));
496
497 FN(PW,free)(pw2);
498
499 return pw1;
500 error:
501 FN(PW,free)(pw1);
502 FN(PW,free)(pw2);
503 return NULL;
504 }
505
506 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
507 {
508 return FN(PW,align_params_pw_pw_and)(pw1, pw2,
509 &FN(PW,add_disjoint_aligned));
510 }
511
512 /* This function is currently only used from isl_aff.c
513 */
514 static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
515 __isl_take PW *pw2,
516 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
517 __attribute__ ((unused));
518
519 /* Apply "fn" to pairs of elements from pw1 and pw2 on shared domains.
520 */
521 static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
522 __isl_take PW *pw2,
523 __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
524 {
525 int i, j, n;
526 PW *res = NULL;
527
528 if (!pw1 || !pw2)
529 goto error;
530
531 n = pw1->n * pw2->n;
532 #ifdef HAS_TYPE
533 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
534 #else
535 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
536 #endif
537
538 for (i = 0; i < pw1->n; ++i) {
539 for (j = 0; j < pw2->n; ++j) {
540 isl_set *common;
541 EL *res_ij;
542 int empty;
543
544 common = isl_set_intersect(
545 isl_set_copy(pw1->p[i].set),
546 isl_set_copy(pw2->p[j].set));
547 empty = isl_set_plain_is_empty(common);
548 if (empty < 0 || empty) {
549 isl_set_free(common);
550 if (empty < 0)
551 goto error;
552 continue;
553 }
554
555 res_ij = fn(FN(EL,copy)(pw1->p[i].FIELD),
556 FN(EL,copy)(pw2->p[j].FIELD));
557 res_ij = FN(EL,gist)(res_ij, isl_set_copy(common));
558
559 res = FN(PW,add_piece)(res, common, res_ij);
560 }
561 }
562
563 FN(PW,free)(pw1);
564 FN(PW,free)(pw2);
565 return res;
566 error:
567 FN(PW,free)(pw1);
568 FN(PW,free)(pw2);
569 FN(PW,free)(res);
570 return NULL;
571 }
572
573 #ifndef NO_NEG
574 __isl_give PW *FN(PW,neg)(__isl_take PW *pw)
575 {
576 int i;
577
578 if (!pw)
579 return NULL;
580
581 if (FN(PW,IS_ZERO)(pw))
582 return pw;
583
584 pw = FN(PW,cow)(pw);
585 if (!pw)
586 return NULL;
587
588 for (i = 0; i < pw->n; ++i) {
589 pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
590 if (!pw->p[i].FIELD)
591 return FN(PW,free)(pw);
592 }
593
594 return pw;
595 }
596
597 __isl_give PW *FN(PW,sub)(__isl_take PW *pw1, __isl_take PW *pw2)
598 {
599 return FN(PW,add)(pw1, FN(PW,neg)(pw2));
600 }
601 #endif
602
603 #ifndef NO_EVAL
604 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
605 __isl_take isl_point *pnt)
606 {
607 int i;
608 int found = 0;
609 isl_ctx *ctx;
610 isl_space *pnt_dim = NULL;
611 isl_qpolynomial *qp;
612
613 if (!pw || !pnt)
614 goto error;
615 ctx = isl_point_get_ctx(pnt);
616 pnt_dim = isl_point_get_space(pnt);
617 isl_assert(ctx, isl_space_is_domain(pnt_dim, pw->dim), goto error);
618
619 for (i = 0; i < pw->n; ++i) {
620 found = isl_set_contains_point(pw->p[i].set, pnt);
621 if (found < 0)
622 goto error;
623 if (found)
624 break;
625 }
626 if (found)
627 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
628 isl_point_copy(pnt));
629 else
630 qp = isl_qpolynomial_zero_on_domain(FN(PW,get_domain_space)(pw));
631 FN(PW,free)(pw);
632 isl_space_free(pnt_dim);
633 isl_point_free(pnt);
634 return qp;
635 error:
636 FN(PW,free)(pw);
637 isl_space_free(pnt_dim);
638 isl_point_free(pnt);
639 return NULL;
640 }
641 #endif
642
643 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
644 {
645 int i;
646 isl_set *dom;
647
648 if (!pw)
649 return NULL;
650
651 dom = isl_set_empty(FN(PW,get_domain_space)(pw));
652 for (i = 0; i < pw->n; ++i)
653 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
654
655 FN(PW,free)(pw);
656
657 return dom;
658 }
659
660 /* Restrict the domain of "pw" by combining each cell
661 * with "set" through a call to "fn", where "fn" may be
662 * isl_set_intersect or isl_set_intersect_params.
663 */
664 static __isl_give PW *FN(PW,intersect_aligned)(__isl_take PW *pw,
665 __isl_take isl_set *set,
666 __isl_give isl_set *(*fn)(__isl_take isl_set *set1,
667 __isl_take isl_set *set2))
668 {
669 int i;
670
671 if (!pw || !set)
672 goto error;
673
674 if (pw->n == 0) {
675 isl_set_free(set);
676 return pw;
677 }
678
679 pw = FN(PW,cow)(pw);
680 if (!pw)
681 goto error;
682
683 for (i = pw->n - 1; i >= 0; --i) {
684 isl_basic_set *aff;
685 pw->p[i].set = fn(pw->p[i].set, isl_set_copy(set));
686 if (!pw->p[i].set)
687 goto error;
688 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
689 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
690 aff);
691 if (!pw->p[i].FIELD)
692 goto error;
693 if (isl_set_plain_is_empty(pw->p[i].set)) {
694 isl_set_free(pw->p[i].set);
695 FN(EL,free)(pw->p[i].FIELD);
696 if (i != pw->n - 1)
697 pw->p[i] = pw->p[pw->n - 1];
698 pw->n--;
699 }
700 }
701
702 isl_set_free(set);
703 return pw;
704 error:
705 isl_set_free(set);
706 FN(PW,free)(pw);
707 return NULL;
708 }
709
710 static __isl_give PW *FN(PW,intersect_domain_aligned)(__isl_take PW *pw,
711 __isl_take isl_set *set)
712 {
713 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect);
714 }
715
716 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw,
717 __isl_take isl_set *context)
718 {
719 return FN(PW,align_params_pw_set_and)(pw, context,
720 &FN(PW,intersect_domain_aligned));
721 }
722
723 static __isl_give PW *FN(PW,intersect_params_aligned)(__isl_take PW *pw,
724 __isl_take isl_set *set)
725 {
726 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect_params);
727 }
728
729 /* Intersect the domain of "pw" with the parameter domain "context".
730 */
731 __isl_give PW *FN(PW,intersect_params)(__isl_take PW *pw,
732 __isl_take isl_set *context)
733 {
734 return FN(PW,align_params_pw_set_and)(pw, context,
735 &FN(PW,intersect_params_aligned));
736 }
737
738 static __isl_give PW *FN(PW,gist_aligned)(__isl_take PW *pw,
739 __isl_take isl_set *context,
740 __isl_give EL *(*fn_el)(__isl_take EL *el,
741 __isl_take isl_set *set),
742 __isl_give isl_set *(*fn_dom)(__isl_take isl_set *set,
743 __isl_take isl_basic_set *bset))
744 {
745 int i;
746 isl_basic_set *hull = NULL;
747
748 if (!pw || !context)
749 goto error;
750
751 if (pw->n == 0) {
752 isl_set_free(context);
753 return pw;
754 }
755
756 if (!isl_space_match(pw->dim, isl_dim_param,
757 context->dim, isl_dim_param)) {
758 pw = FN(PW,align_params)(pw, isl_set_get_space(context));
759 context = isl_set_align_params(context, FN(PW,get_space)(pw));
760 }
761
762 context = isl_set_compute_divs(context);
763 hull = isl_set_simple_hull(isl_set_copy(context));
764
765 pw = FN(PW,cow)(pw);
766 if (!pw)
767 goto error;
768
769 for (i = pw->n - 1; i >= 0; --i) {
770 pw->p[i].set = isl_set_intersect(pw->p[i].set,
771 isl_set_copy(context));
772 if (!pw->p[i].set)
773 goto error;
774 pw->p[i].FIELD = fn_el(pw->p[i].FIELD,
775 isl_set_copy(pw->p[i].set));
776 pw->p[i].set = fn_dom(pw->p[i].set, isl_basic_set_copy(hull));
777 if (!pw->p[i].set)
778 goto error;
779 if (isl_set_plain_is_empty(pw->p[i].set)) {
780 isl_set_free(pw->p[i].set);
781 FN(EL,free)(pw->p[i].FIELD);
782 if (i != pw->n - 1)
783 pw->p[i] = pw->p[pw->n - 1];
784 pw->n--;
785 }
786 }
787
788 isl_basic_set_free(hull);
789 isl_set_free(context);
790
791 return pw;
792 error:
793 FN(PW,free)(pw);
794 isl_basic_set_free(hull);
795 isl_set_free(context);
796 return NULL;
797 }
798
799 static __isl_give PW *FN(PW,gist_domain_aligned)(__isl_take PW *pw,
800 __isl_take isl_set *set)
801 {
802 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist),
803 &isl_set_gist_basic_set);
804 }
805
806 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
807 {
808 return FN(PW,align_params_pw_set_and)(pw, context,
809 &FN(PW,gist_domain_aligned));
810 }
811
812 static __isl_give PW *FN(PW,gist_params_aligned)(__isl_take PW *pw,
813 __isl_take isl_set *set)
814 {
815 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist_params),
816 &isl_set_gist_params_basic_set);
817 }
818
819 __isl_give PW *FN(PW,gist_params)(__isl_take PW *pw,
820 __isl_take isl_set *context)
821 {
822 return FN(PW,align_params_pw_set_and)(pw, context,
823 &FN(PW,gist_params_aligned));
824 }
825
826 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
827 {
828 int i, j;
829
830 if (!pw)
831 return NULL;
832 if (pw->n == 0)
833 return pw;
834
835 for (i = pw->n - 1; i >= 0; --i) {
836 for (j = i - 1; j >= 0; --j) {
837 if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
838 pw->p[j].FIELD))
839 continue;
840 pw->p[j].set = isl_set_union(pw->p[j].set,
841 pw->p[i].set);
842 FN(EL,free)(pw->p[i].FIELD);
843 if (i != pw->n - 1)
844 pw->p[i] = pw->p[pw->n - 1];
845 pw->n--;
846 break;
847 }
848 if (j >= 0)
849 continue;
850 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
851 if (!pw->p[i].set)
852 goto error;
853 }
854
855 return pw;
856 error:
857 FN(PW,free)(pw);
858 return NULL;
859 }
860
861 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
862 {
863 return pw ? isl_space_get_ctx(pw->dim) : NULL;
864 }
865
866 #ifndef NO_INVOLVES_DIMS
867 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
868 unsigned first, unsigned n)
869 {
870 int i;
871 enum isl_dim_type set_type;
872
873 if (!pw)
874 return -1;
875 if (pw->n == 0 || n == 0)
876 return 0;
877
878 set_type = type == isl_dim_in ? isl_dim_set : type;
879
880 for (i = 0; i < pw->n; ++i) {
881 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
882 type, first, n);
883 if (involves < 0 || involves)
884 return involves;
885 involves = isl_set_involves_dims(pw->p[i].set,
886 set_type, first, n);
887 if (involves < 0 || involves)
888 return involves;
889 }
890 return 0;
891 }
892 #endif
893
894 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
895 enum isl_dim_type type, unsigned pos, const char *s)
896 {
897 int i;
898 enum isl_dim_type set_type;
899
900 pw = FN(PW,cow)(pw);
901 if (!pw)
902 return NULL;
903
904 set_type = type == isl_dim_in ? isl_dim_set : type;
905
906 pw->dim = isl_space_set_dim_name(pw->dim, type, pos, s);
907 if (!pw->dim)
908 goto error;
909
910 for (i = 0; i < pw->n; ++i) {
911 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set,
912 set_type, pos, s);
913 if (!pw->p[i].set)
914 goto error;
915 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
916 if (!pw->p[i].FIELD)
917 goto error;
918 }
919
920 return pw;
921 error:
922 FN(PW,free)(pw);
923 return NULL;
924 }
925
926 #ifndef NO_DROP_DIMS
927 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
928 enum isl_dim_type type, unsigned first, unsigned n)
929 {
930 int i;
931 enum isl_dim_type set_type;
932
933 if (!pw)
934 return NULL;
935 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
936 return pw;
937
938 set_type = type == isl_dim_in ? isl_dim_set : type;
939
940 pw = FN(PW,cow)(pw);
941 if (!pw)
942 return NULL;
943 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
944 if (!pw->dim)
945 goto error;
946 for (i = 0; i < pw->n; ++i) {
947 pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
948 if (!pw->p[i].set)
949 goto error;
950 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
951 if (!pw->p[i].FIELD)
952 goto error;
953 }
954
955 return pw;
956 error:
957 FN(PW,free)(pw);
958 return NULL;
959 }
960
961 /* This function is very similar to drop_dims.
962 * The only difference is that the cells may still involve
963 * the specified dimensions. They are removed using
964 * isl_set_project_out instead of isl_set_drop.
965 */
966 __isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
967 enum isl_dim_type type, unsigned first, unsigned n)
968 {
969 int i;
970 enum isl_dim_type set_type;
971
972 if (!pw)
973 return NULL;
974 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
975 return pw;
976
977 set_type = type == isl_dim_in ? isl_dim_set : type;
978
979 pw = FN(PW,cow)(pw);
980 if (!pw)
981 return NULL;
982 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
983 if (!pw->dim)
984 goto error;
985 for (i = 0; i < pw->n; ++i) {
986 pw->p[i].set = isl_set_project_out(pw->p[i].set,
987 set_type, first, n);
988 if (!pw->p[i].set)
989 goto error;
990 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
991 if (!pw->p[i].FIELD)
992 goto error;
993 }
994
995 return pw;
996 error:
997 FN(PW,free)(pw);
998 return NULL;
999 }
1000
1001 /* Project the domain of pw onto its parameter space.
1002 */
1003 __isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
1004 {
1005 isl_space *space;
1006 unsigned n;
1007
1008 n = FN(PW,dim)(pw, isl_dim_in);
1009 pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
1010 space = FN(PW,get_domain_space)(pw);
1011 space = isl_space_params(space);
1012 pw = FN(PW,reset_domain_space)(pw, space);
1013 return pw;
1014 }
1015 #endif
1016
1017 #ifndef NO_INSERT_DIMS
1018 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
1019 unsigned first, unsigned n)
1020 {
1021 int i;
1022 enum isl_dim_type set_type;
1023
1024 if (!pw)
1025 return NULL;
1026 if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
1027 return pw;
1028
1029 set_type = type == isl_dim_in ? isl_dim_set : type;
1030
1031 pw = FN(PW,cow)(pw);
1032 if (!pw)
1033 return NULL;
1034
1035 pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
1036 if (!pw->dim)
1037 goto error;
1038
1039 for (i = 0; i < pw->n; ++i) {
1040 pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
1041 set_type, first, n);
1042 if (!pw->p[i].set)
1043 goto error;
1044 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
1045 type, first, n);
1046 if (!pw->p[i].FIELD)
1047 goto error;
1048 }
1049
1050 return pw;
1051 error:
1052 FN(PW,free)(pw);
1053 return NULL;
1054 }
1055 #endif
1056
1057 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
1058 enum isl_dim_type type, unsigned pos, isl_int v)
1059 {
1060 int i;
1061
1062 if (!pw)
1063 return NULL;
1064
1065 if (type == isl_dim_in)
1066 type = isl_dim_set;
1067
1068 pw = FN(PW,cow)(pw);
1069 if (!pw)
1070 return NULL;
1071 for (i = 0; i < pw->n; ++i) {
1072 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
1073 if (!pw->p[i].set)
1074 goto error;
1075 }
1076
1077 return pw;
1078 error:
1079 FN(PW,free)(pw);
1080 return NULL;
1081 }
1082
1083 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
1084 {
1085 return pw ? isl_space_dim(pw->dim, type) : 0;
1086 }
1087
1088 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
1089 enum isl_dim_type type, unsigned first, unsigned n)
1090 {
1091 int i;
1092
1093 if (!pw)
1094 return NULL;
1095 if (n == 0)
1096 return pw;
1097
1098 if (type == isl_dim_in)
1099 type = isl_dim_set;
1100
1101 pw = FN(PW,cow)(pw);
1102 if (!pw)
1103 return NULL;
1104 if (!pw->dim)
1105 goto error;
1106 for (i = 0; i < pw->n; ++i) {
1107 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
1108 if (!pw->p[i].set)
1109 goto error;
1110 }
1111
1112 return pw;
1113 error:
1114 FN(PW,free)(pw);
1115 return NULL;
1116 }
1117
1118 #ifndef NO_OPT
1119 /* Compute the maximal value attained by the piecewise quasipolynomial
1120 * on its domain or zero if the domain is empty.
1121 * In the worst case, the domain is scanned completely,
1122 * so the domain is assumed to be bounded.
1123 */
1124 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
1125 {
1126 int i;
1127 isl_qpolynomial *opt;
1128
1129 if (!pw)
1130 return NULL;
1131
1132 if (pw->n == 0) {
1133 isl_space *dim = isl_space_copy(pw->dim);
1134 FN(PW,free)(pw);
1135 return isl_qpolynomial_zero_on_domain(isl_space_domain(dim));
1136 }
1137
1138 opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
1139 isl_set_copy(pw->p[0].set), max);
1140 for (i = 1; i < pw->n; ++i) {
1141 isl_qpolynomial *opt_i;
1142 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
1143 isl_set_copy(pw->p[i].set), max);
1144 if (max)
1145 opt = isl_qpolynomial_max_cst(opt, opt_i);
1146 else
1147 opt = isl_qpolynomial_min_cst(opt, opt_i);
1148 }
1149
1150 FN(PW,free)(pw);
1151 return opt;
1152 }
1153
1154 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
1155 {
1156 return FN(PW,opt)(pw, 1);
1157 }
1158
1159 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
1160 {
1161 return FN(PW,opt)(pw, 0);
1162 }
1163 #endif
1164
1165 __isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
1166 {
1167 return pw ? isl_space_copy(pw->dim) : NULL;
1168 }
1169
1170 __isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
1171 {
1172 return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
1173 }
1174
1175 #ifndef NO_RESET_DIM
1176 /* Reset the space of "pw". Since we don't know if the elements
1177 * represent the spaces themselves or their domains, we pass along
1178 * both when we call their reset_space_and_domain.
1179 */
1180 static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
1181 __isl_take isl_space *space, __isl_take isl_space *domain)
1182 {
1183 int i;
1184
1185 pw = FN(PW,cow)(pw);
1186 if (!pw || !space || !domain)
1187 goto error;
1188
1189 for (i = 0; i < pw->n; ++i) {
1190 pw->p[i].set = isl_set_reset_space(pw->p[i].set,
1191 isl_space_copy(domain));
1192 if (!pw->p[i].set)
1193 goto error;
1194 pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
1195 isl_space_copy(space), isl_space_copy(domain));
1196 if (!pw->p[i].FIELD)
1197 goto error;
1198 }
1199
1200 isl_space_free(domain);
1201
1202 isl_space_free(pw->dim);
1203 pw->dim = space;
1204
1205 return pw;
1206 error:
1207 isl_space_free(domain);
1208 isl_space_free(space);
1209 FN(PW,free)(pw);
1210 return NULL;
1211 }
1212
1213 __isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
1214 __isl_take isl_space *domain)
1215 {
1216 isl_space *space;
1217
1218 space = isl_space_extend_domain_with_range(isl_space_copy(domain),
1219 FN(PW,get_space)(pw));
1220 return FN(PW,reset_space_and_domain)(pw, space, domain);
1221 }
1222
1223 __isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
1224 {
1225 isl_space *domain;
1226
1227 domain = isl_space_domain(isl_space_copy(dim));
1228 return FN(PW,reset_space_and_domain)(pw, dim, domain);
1229 }
1230
1231 __isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
1232 __isl_take isl_id *id)
1233 {
1234 isl_space *space;
1235
1236 pw = FN(PW,cow)(pw);
1237 if (!pw)
1238 return isl_id_free(id);
1239
1240 space = FN(PW,get_space)(pw);
1241 space = isl_space_set_tuple_id(space, type, id);
1242
1243 return FN(PW,reset_space)(pw, space);
1244 }
1245
1246 __isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
1247 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1248 {
1249 pw = FN(PW,cow)(pw);
1250 if (!pw)
1251 return isl_id_free(id);
1252 pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
1253 return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
1254 }
1255 #endif
1256
1257 int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1258 {
1259 if (!pw1 || !pw2)
1260 return -1;
1261
1262 return isl_space_is_equal(pw1->dim, pw2->dim);
1263 }
1264
1265 #ifndef NO_MORPH
1266 __isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
1267 __isl_take isl_morph *morph)
1268 {
1269 int i;
1270 isl_ctx *ctx;
1271
1272 if (!pw || !morph)
1273 goto error;
1274
1275 ctx = isl_space_get_ctx(pw->dim);
1276 isl_assert(ctx, isl_space_is_domain(morph->dom->dim, pw->dim),
1277 goto error);
1278
1279 pw = FN(PW,cow)(pw);
1280 if (!pw)
1281 goto error;
1282 pw->dim = isl_space_extend_domain_with_range(
1283 isl_space_copy(morph->ran->dim), pw->dim);
1284 if (!pw->dim)
1285 goto error;
1286
1287 for (i = 0; i < pw->n; ++i) {
1288 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
1289 if (!pw->p[i].set)
1290 goto error;
1291 pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
1292 isl_morph_copy(morph));
1293 if (!pw->p[i].FIELD)
1294 goto error;
1295 }
1296
1297 isl_morph_free(morph);
1298
1299 return pw;
1300 error:
1301 FN(PW,free)(pw);
1302 isl_morph_free(morph);
1303 return NULL;
1304 }
1305 #endif
1306
1307 int FN(PW,n_piece)(__isl_keep PW *pw)
1308 {
1309 return pw ? pw->n : 0;
1310 }
1311
1312 int FN(PW,foreach_piece)(__isl_keep PW *pw,
1313 int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
1314 void *user)
1315 {
1316 int i;
1317
1318 if (!pw)
1319 return -1;
1320
1321 for (i = 0; i < pw->n; ++i)
1322 if (fn(isl_set_copy(pw->p[i].set),
1323 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
1324 return -1;
1325
1326 return 0;
1327 }
1328
1329 #ifndef NO_LIFT
1330 static int any_divs(__isl_keep isl_set *set)
1331 {
1332 int i;
1333
1334 if (!set)
1335 return -1;
1336
1337 for (i = 0; i < set->n; ++i)
1338 if (set->p[i]->n_div > 0)
1339 return 1;
1340
1341 return 0;
1342 }
1343
1344 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
1345 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1346 void *user), void *user)
1347 {
1348 int i;
1349
1350 if (!set || !el)
1351 goto error;
1352
1353 for (i = 0; i < set->n; ++i) {
1354 isl_set *lift;
1355 EL *copy;
1356
1357 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
1358 lift = isl_set_lift(lift);
1359
1360 copy = FN(EL,copy)(el);
1361 copy = FN(EL,lift)(copy, isl_set_get_space(lift));
1362
1363 if (fn(lift, copy, user) < 0)
1364 goto error;
1365 }
1366
1367 isl_set_free(set);
1368 FN(EL,free)(el);
1369
1370 return 0;
1371 error:
1372 isl_set_free(set);
1373 FN(EL,free)(el);
1374 return -1;
1375 }
1376
1377 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
1378 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1379 void *user), void *user)
1380 {
1381 int i;
1382
1383 if (!pw)
1384 return -1;
1385
1386 for (i = 0; i < pw->n; ++i) {
1387 isl_set *set;
1388 EL *el;
1389
1390 set = isl_set_copy(pw->p[i].set);
1391 el = FN(EL,copy)(pw->p[i].FIELD);
1392 if (!any_divs(set)) {
1393 if (fn(set, el, user) < 0)
1394 return -1;
1395 continue;
1396 }
1397 if (foreach_lifted_subset(set, el, fn, user) < 0)
1398 return -1;
1399 }
1400
1401 return 0;
1402 }
1403 #endif
1404
1405 #ifndef NO_MOVE_DIMS
1406 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
1407 enum isl_dim_type dst_type, unsigned dst_pos,
1408 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1409 {
1410 int i;
1411
1412 pw = FN(PW,cow)(pw);
1413 if (!pw)
1414 return NULL;
1415
1416 pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
1417 if (!pw->dim)
1418 goto error;
1419
1420 for (i = 0; i < pw->n; ++i) {
1421 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
1422 dst_type, dst_pos, src_type, src_pos, n);
1423 if (!pw->p[i].FIELD)
1424 goto error;
1425 }
1426
1427 if (dst_type == isl_dim_in)
1428 dst_type = isl_dim_set;
1429 if (src_type == isl_dim_in)
1430 src_type = isl_dim_set;
1431
1432 for (i = 0; i < pw->n; ++i) {
1433 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
1434 dst_type, dst_pos,
1435 src_type, src_pos, n);
1436 if (!pw->p[i].set)
1437 goto error;
1438 }
1439
1440 return pw;
1441 error:
1442 FN(PW,free)(pw);
1443 return NULL;
1444 }
1445 #endif
1446
1447 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
1448 {
1449 int i;
1450
1451 if (isl_int_is_one(v))
1452 return pw;
1453 if (pw && DEFAULT_IS_ZERO && isl_int_is_zero(v)) {
1454 PW *zero;
1455 isl_space *dim = FN(PW,get_space)(pw);
1456 #ifdef HAS_TYPE
1457 zero = FN(PW,ZERO)(dim, pw->type);
1458 #else
1459 zero = FN(PW,ZERO)(dim);
1460 #endif
1461 FN(PW,free)(pw);
1462 return zero;
1463 }
1464 pw = FN(PW,cow)(pw);
1465 if (!pw)
1466 return NULL;
1467 if (pw->n == 0)
1468 return pw;
1469
1470 #ifdef HAS_TYPE
1471 if (isl_int_is_neg(v))
1472 pw->type = isl_fold_type_negate(pw->type);
1473 #endif
1474 for (i = 0; i < pw->n; ++i) {
1475 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1476 if (!pw->p[i].FIELD)
1477 goto error;
1478 }
1479
1480 return pw;
1481 error:
1482 FN(PW,free)(pw);
1483 return NULL;
1484 }
1485
1486 __isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
1487 {
1488 return FN(PW,mul_isl_int)(pw, v);
1489 }
1490
1491 static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
1492 {
1493 const isl_set *set1 = *(const isl_set **)p1;
1494 const isl_set *set2 = *(const isl_set **)p2;
1495
1496 return isl_set_plain_cmp(set1, set2);
1497 }
1498
1499 /* We normalize in place, but if anything goes wrong we need
1500 * to return NULL, so we need to make sure we don't change the
1501 * meaning of any possible other copies of map.
1502 */
1503 __isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
1504 {
1505 int i, j;
1506 isl_set *set;
1507
1508 if (!pw)
1509 return NULL;
1510 for (i = 0; i < pw->n; ++i) {
1511 set = isl_set_normalize(isl_set_copy(pw->p[i].set));
1512 if (!set)
1513 return FN(PW,free)(pw);
1514 isl_set_free(pw->p[i].set);
1515 pw->p[i].set = set;
1516 }
1517 qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
1518 for (i = pw->n - 1; i >= 1; --i) {
1519 if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
1520 continue;
1521 if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
1522 continue;
1523 set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
1524 isl_set_copy(pw->p[i].set));
1525 if (!set)
1526 return FN(PW,free)(pw);
1527 isl_set_free(pw->p[i].set);
1528 FN(EL,free)(pw->p[i].FIELD);
1529 isl_set_free(pw->p[i - 1].set);
1530 pw->p[i - 1].set = set;
1531 for (j = i + 1; j < pw->n; ++j)
1532 pw->p[j - 1] = pw->p[j];
1533 pw->n--;
1534 }
1535
1536 return pw;
1537 }
1538
1539 /* Is pw1 obviously equal to pw2?
1540 * That is, do they have obviously identical cells and obviously identical
1541 * elements on each cell?
1542 */
1543 int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1544 {
1545 int i;
1546 int equal;
1547
1548 if (!pw1 || !pw2)
1549 return -1;
1550
1551 if (pw1 == pw2)
1552 return 1;
1553 if (!isl_space_is_equal(pw1->dim, pw2->dim))
1554 return 0;
1555
1556 pw1 = FN(PW,copy)(pw1);
1557 pw2 = FN(PW,copy)(pw2);
1558 pw1 = FN(PW,normalize)(pw1);
1559 pw2 = FN(PW,normalize)(pw2);
1560 if (!pw1 || !pw2)
1561 goto error;
1562
1563 equal = pw1->n == pw2->n;
1564 for (i = 0; equal && i < pw1->n; ++i) {
1565 equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
1566 if (equal < 0)
1567 goto error;
1568 if (!equal)
1569 break;
1570 equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
1571 if (equal < 0)
1572 goto error;
1573 }
1574
1575 FN(PW,free)(pw1);
1576 FN(PW,free)(pw2);
1577 return equal;
1578 error:
1579 FN(PW,free)(pw1);
1580 FN(PW,free)(pw2);
1581 return -1;
1582 }
Integer set library