?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
isl_basic_set_total_dim: handle NULL input
[isl.git] / isl_pw_templ.c
blobed19733f5b47d5a8bafdef0fcd4716016df07b98
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 set = isl_set_subtract(set,
375 isl_set_copy(pw2->p[j].set));
376 common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
377 isl_set_copy(pw2->p[j].set));
378 if (isl_set_plain_is_empty(common)) {
379 isl_set_free(common);
380 continue;
381 }
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
558 res = FN(PW,add_piece)(res, common, res_ij);
559 }
560 }
561
562 FN(PW,free)(pw1);
563 FN(PW,free)(pw2);
564 return res;
565 error:
566 FN(PW,free)(pw1);
567 FN(PW,free)(pw2);
568 FN(PW,free)(res);
569 return NULL;
570 }
571
572 #ifndef NO_NEG
573 __isl_give PW *FN(PW,neg)(__isl_take PW *pw)
574 {
575 int i;
576
577 if (!pw)
578 return NULL;
579
580 if (FN(PW,IS_ZERO)(pw))
581 return pw;
582
583 pw = FN(PW,cow)(pw);
584 if (!pw)
585 return NULL;
586
587 for (i = 0; i < pw->n; ++i) {
588 pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
589 if (!pw->p[i].FIELD)
590 return FN(PW,free)(pw);
591 }
592
593 return pw;
594 }
595
596 __isl_give PW *FN(PW,sub)(__isl_take PW *pw1, __isl_take PW *pw2)
597 {
598 return FN(PW,add)(pw1, FN(PW,neg)(pw2));
599 }
600 #endif
601
602 #ifndef NO_EVAL
603 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
604 __isl_take isl_point *pnt)
605 {
606 int i;
607 int found = 0;
608 isl_ctx *ctx;
609 isl_space *pnt_dim = NULL;
610 isl_qpolynomial *qp;
611
612 if (!pw || !pnt)
613 goto error;
614 ctx = isl_point_get_ctx(pnt);
615 pnt_dim = isl_point_get_space(pnt);
616 isl_assert(ctx, isl_space_is_domain(pnt_dim, pw->dim), goto error);
617
618 for (i = 0; i < pw->n; ++i) {
619 found = isl_set_contains_point(pw->p[i].set, pnt);
620 if (found < 0)
621 goto error;
622 if (found)
623 break;
624 }
625 if (found)
626 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
627 isl_point_copy(pnt));
628 else
629 qp = isl_qpolynomial_zero_on_domain(FN(PW,get_domain_space)(pw));
630 FN(PW,free)(pw);
631 isl_space_free(pnt_dim);
632 isl_point_free(pnt);
633 return qp;
634 error:
635 FN(PW,free)(pw);
636 isl_space_free(pnt_dim);
637 isl_point_free(pnt);
638 return NULL;
639 }
640 #endif
641
642 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
643 {
644 int i;
645 isl_set *dom;
646
647 if (!pw)
648 return NULL;
649
650 dom = isl_set_empty(FN(PW,get_domain_space)(pw));
651 for (i = 0; i < pw->n; ++i)
652 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
653
654 FN(PW,free)(pw);
655
656 return dom;
657 }
658
659 /* Restrict the domain of "pw" by combining each cell
660 * with "set" through a call to "fn", where "fn" may be
661 * isl_set_intersect or isl_set_intersect_params.
662 */
663 static __isl_give PW *FN(PW,intersect_aligned)(__isl_take PW *pw,
664 __isl_take isl_set *set,
665 __isl_give isl_set *(*fn)(__isl_take isl_set *set1,
666 __isl_take isl_set *set2))
667 {
668 int i;
669
670 if (!pw || !set)
671 goto error;
672
673 if (pw->n == 0) {
674 isl_set_free(set);
675 return pw;
676 }
677
678 pw = FN(PW,cow)(pw);
679 if (!pw)
680 goto error;
681
682 for (i = pw->n - 1; i >= 0; --i) {
683 isl_basic_set *aff;
684 pw->p[i].set = fn(pw->p[i].set, isl_set_copy(set));
685 if (!pw->p[i].set)
686 goto error;
687 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
688 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
689 aff);
690 if (!pw->p[i].FIELD)
691 goto error;
692 if (isl_set_plain_is_empty(pw->p[i].set)) {
693 isl_set_free(pw->p[i].set);
694 FN(EL,free)(pw->p[i].FIELD);
695 if (i != pw->n - 1)
696 pw->p[i] = pw->p[pw->n - 1];
697 pw->n--;
698 }
699 }
700
701 isl_set_free(set);
702 return pw;
703 error:
704 isl_set_free(set);
705 FN(PW,free)(pw);
706 return NULL;
707 }
708
709 static __isl_give PW *FN(PW,intersect_domain_aligned)(__isl_take PW *pw,
710 __isl_take isl_set *set)
711 {
712 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect);
713 }
714
715 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw,
716 __isl_take isl_set *context)
717 {
718 return FN(PW,align_params_pw_set_and)(pw, context,
719 &FN(PW,intersect_domain_aligned));
720 }
721
722 static __isl_give PW *FN(PW,intersect_params_aligned)(__isl_take PW *pw,
723 __isl_take isl_set *set)
724 {
725 return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect_params);
726 }
727
728 /* Intersect the domain of "pw" with the parameter domain "context".
729 */
730 __isl_give PW *FN(PW,intersect_params)(__isl_take PW *pw,
731 __isl_take isl_set *context)
732 {
733 return FN(PW,align_params_pw_set_and)(pw, context,
734 &FN(PW,intersect_params_aligned));
735 }
736
737 static __isl_give PW *FN(PW,gist_aligned)(__isl_take PW *pw,
738 __isl_take isl_set *context,
739 __isl_give EL *(*fn_el)(__isl_take EL *el,
740 __isl_take isl_set *set),
741 __isl_give isl_set *(*fn_dom)(__isl_take isl_set *set,
742 __isl_take isl_basic_set *bset))
743 {
744 int i;
745 isl_basic_set *hull = NULL;
746
747 if (!pw || !context)
748 goto error;
749
750 if (pw->n == 0) {
751 isl_set_free(context);
752 return pw;
753 }
754
755 if (!isl_space_match(pw->dim, isl_dim_param,
756 context->dim, isl_dim_param)) {
757 pw = FN(PW,align_params)(pw, isl_set_get_space(context));
758 context = isl_set_align_params(context, FN(PW,get_space)(pw));
759 }
760
761 context = isl_set_compute_divs(context);
762 hull = isl_set_simple_hull(isl_set_copy(context));
763
764 pw = FN(PW,cow)(pw);
765 if (!pw)
766 goto error;
767
768 for (i = pw->n - 1; i >= 0; --i) {
769 pw->p[i].set = isl_set_intersect(pw->p[i].set,
770 isl_set_copy(context));
771 if (!pw->p[i].set)
772 goto error;
773 pw->p[i].FIELD = fn_el(pw->p[i].FIELD,
774 isl_set_copy(pw->p[i].set));
775 pw->p[i].set = fn_dom(pw->p[i].set, isl_basic_set_copy(hull));
776 if (!pw->p[i].set)
777 goto error;
778 if (isl_set_plain_is_empty(pw->p[i].set)) {
779 isl_set_free(pw->p[i].set);
780 FN(EL,free)(pw->p[i].FIELD);
781 if (i != pw->n - 1)
782 pw->p[i] = pw->p[pw->n - 1];
783 pw->n--;
784 }
785 }
786
787 isl_basic_set_free(hull);
788 isl_set_free(context);
789
790 return pw;
791 error:
792 FN(PW,free)(pw);
793 isl_basic_set_free(hull);
794 isl_set_free(context);
795 return NULL;
796 }
797
798 static __isl_give PW *FN(PW,gist_domain_aligned)(__isl_take PW *pw,
799 __isl_take isl_set *set)
800 {
801 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist),
802 &isl_set_gist_basic_set);
803 }
804
805 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
806 {
807 return FN(PW,align_params_pw_set_and)(pw, context,
808 &FN(PW,gist_domain_aligned));
809 }
810
811 static __isl_give PW *FN(PW,gist_params_aligned)(__isl_take PW *pw,
812 __isl_take isl_set *set)
813 {
814 return FN(PW,gist_aligned)(pw, set, &FN(EL,gist_params),
815 &isl_set_gist_params_basic_set);
816 }
817
818 __isl_give PW *FN(PW,gist_params)(__isl_take PW *pw,
819 __isl_take isl_set *context)
820 {
821 return FN(PW,align_params_pw_set_and)(pw, context,
822 &FN(PW,gist_params_aligned));
823 }
824
825 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
826 {
827 int i, j;
828
829 if (!pw)
830 return NULL;
831 if (pw->n == 0)
832 return pw;
833
834 for (i = pw->n - 1; i >= 0; --i) {
835 for (j = i - 1; j >= 0; --j) {
836 if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
837 pw->p[j].FIELD))
838 continue;
839 pw->p[j].set = isl_set_union(pw->p[j].set,
840 pw->p[i].set);
841 FN(EL,free)(pw->p[i].FIELD);
842 if (i != pw->n - 1)
843 pw->p[i] = pw->p[pw->n - 1];
844 pw->n--;
845 break;
846 }
847 if (j >= 0)
848 continue;
849 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
850 if (!pw->p[i].set)
851 goto error;
852 }
853
854 return pw;
855 error:
856 FN(PW,free)(pw);
857 return NULL;
858 }
859
860 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
861 {
862 return pw ? isl_space_get_ctx(pw->dim) : NULL;
863 }
864
865 #ifndef NO_INVOLVES_DIMS
866 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
867 unsigned first, unsigned n)
868 {
869 int i;
870 enum isl_dim_type set_type;
871
872 if (!pw)
873 return -1;
874 if (pw->n == 0 || n == 0)
875 return 0;
876
877 set_type = type == isl_dim_in ? isl_dim_set : type;
878
879 for (i = 0; i < pw->n; ++i) {
880 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
881 type, first, n);
882 if (involves < 0 || involves)
883 return involves;
884 involves = isl_set_involves_dims(pw->p[i].set,
885 set_type, first, n);
886 if (involves < 0 || involves)
887 return involves;
888 }
889 return 0;
890 }
891 #endif
892
893 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
894 enum isl_dim_type type, unsigned pos, const char *s)
895 {
896 int i;
897 enum isl_dim_type set_type;
898
899 pw = FN(PW,cow)(pw);
900 if (!pw)
901 return NULL;
902
903 set_type = type == isl_dim_in ? isl_dim_set : type;
904
905 pw->dim = isl_space_set_dim_name(pw->dim, type, pos, s);
906 if (!pw->dim)
907 goto error;
908
909 for (i = 0; i < pw->n; ++i) {
910 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set,
911 set_type, pos, s);
912 if (!pw->p[i].set)
913 goto error;
914 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
915 if (!pw->p[i].FIELD)
916 goto error;
917 }
918
919 return pw;
920 error:
921 FN(PW,free)(pw);
922 return NULL;
923 }
924
925 #ifndef NO_DROP_DIMS
926 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
927 enum isl_dim_type type, unsigned first, unsigned n)
928 {
929 int i;
930 enum isl_dim_type set_type;
931
932 if (!pw)
933 return NULL;
934 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
935 return pw;
936
937 set_type = type == isl_dim_in ? isl_dim_set : type;
938
939 pw = FN(PW,cow)(pw);
940 if (!pw)
941 return NULL;
942 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
943 if (!pw->dim)
944 goto error;
945 for (i = 0; i < pw->n; ++i) {
946 pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
947 if (!pw->p[i].set)
948 goto error;
949 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
950 if (!pw->p[i].FIELD)
951 goto error;
952 }
953
954 return pw;
955 error:
956 FN(PW,free)(pw);
957 return NULL;
958 }
959
960 /* This function is very similar to drop_dims.
961 * The only difference is that the cells may still involve
962 * the specified dimensions. They are removed using
963 * isl_set_project_out instead of isl_set_drop.
964 */
965 __isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
966 enum isl_dim_type type, unsigned first, unsigned n)
967 {
968 int i;
969 enum isl_dim_type set_type;
970
971 if (!pw)
972 return NULL;
973 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
974 return pw;
975
976 set_type = type == isl_dim_in ? isl_dim_set : type;
977
978 pw = FN(PW,cow)(pw);
979 if (!pw)
980 return NULL;
981 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
982 if (!pw->dim)
983 goto error;
984 for (i = 0; i < pw->n; ++i) {
985 pw->p[i].set = isl_set_project_out(pw->p[i].set,
986 set_type, first, n);
987 if (!pw->p[i].set)
988 goto error;
989 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
990 if (!pw->p[i].FIELD)
991 goto error;
992 }
993
994 return pw;
995 error:
996 FN(PW,free)(pw);
997 return NULL;
998 }
999
1000 /* Project the domain of pw onto its parameter space.
1001 */
1002 __isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
1003 {
1004 isl_space *space;
1005 unsigned n;
1006
1007 n = FN(PW,dim)(pw, isl_dim_in);
1008 pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
1009 space = FN(PW,get_domain_space)(pw);
1010 space = isl_space_params(space);
1011 pw = FN(PW,reset_domain_space)(pw, space);
1012 return pw;
1013 }
1014 #endif
1015
1016 #ifndef NO_INSERT_DIMS
1017 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
1018 unsigned first, unsigned n)
1019 {
1020 int i;
1021 enum isl_dim_type set_type;
1022
1023 if (!pw)
1024 return NULL;
1025 if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
1026 return pw;
1027
1028 set_type = type == isl_dim_in ? isl_dim_set : type;
1029
1030 pw = FN(PW,cow)(pw);
1031 if (!pw)
1032 return NULL;
1033
1034 pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
1035 if (!pw->dim)
1036 goto error;
1037
1038 for (i = 0; i < pw->n; ++i) {
1039 pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
1040 set_type, first, n);
1041 if (!pw->p[i].set)
1042 goto error;
1043 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
1044 type, first, n);
1045 if (!pw->p[i].FIELD)
1046 goto error;
1047 }
1048
1049 return pw;
1050 error:
1051 FN(PW,free)(pw);
1052 return NULL;
1053 }
1054 #endif
1055
1056 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
1057 enum isl_dim_type type, unsigned pos, isl_int v)
1058 {
1059 int i;
1060
1061 if (!pw)
1062 return NULL;
1063
1064 if (type == isl_dim_in)
1065 type = isl_dim_set;
1066
1067 pw = FN(PW,cow)(pw);
1068 if (!pw)
1069 return NULL;
1070 for (i = 0; i < pw->n; ++i) {
1071 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
1072 if (!pw->p[i].set)
1073 goto error;
1074 }
1075
1076 return pw;
1077 error:
1078 FN(PW,free)(pw);
1079 return NULL;
1080 }
1081
1082 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
1083 {
1084 return pw ? isl_space_dim(pw->dim, type) : 0;
1085 }
1086
1087 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
1088 enum isl_dim_type type, unsigned first, unsigned n)
1089 {
1090 int i;
1091
1092 if (!pw)
1093 return NULL;
1094 if (n == 0)
1095 return pw;
1096
1097 if (type == isl_dim_in)
1098 type = isl_dim_set;
1099
1100 pw = FN(PW,cow)(pw);
1101 if (!pw)
1102 return NULL;
1103 if (!pw->dim)
1104 goto error;
1105 for (i = 0; i < pw->n; ++i) {
1106 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
1107 if (!pw->p[i].set)
1108 goto error;
1109 }
1110
1111 return pw;
1112 error:
1113 FN(PW,free)(pw);
1114 return NULL;
1115 }
1116
1117 #ifndef NO_OPT
1118 /* Compute the maximal value attained by the piecewise quasipolynomial
1119 * on its domain or zero if the domain is empty.
1120 * In the worst case, the domain is scanned completely,
1121 * so the domain is assumed to be bounded.
1122 */
1123 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
1124 {
1125 int i;
1126 isl_qpolynomial *opt;
1127
1128 if (!pw)
1129 return NULL;
1130
1131 if (pw->n == 0) {
1132 isl_space *dim = isl_space_copy(pw->dim);
1133 FN(PW,free)(pw);
1134 return isl_qpolynomial_zero_on_domain(isl_space_domain(dim));
1135 }
1136
1137 opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
1138 isl_set_copy(pw->p[0].set), max);
1139 for (i = 1; i < pw->n; ++i) {
1140 isl_qpolynomial *opt_i;
1141 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
1142 isl_set_copy(pw->p[i].set), max);
1143 if (max)
1144 opt = isl_qpolynomial_max_cst(opt, opt_i);
1145 else
1146 opt = isl_qpolynomial_min_cst(opt, opt_i);
1147 }
1148
1149 FN(PW,free)(pw);
1150 return opt;
1151 }
1152
1153 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
1154 {
1155 return FN(PW,opt)(pw, 1);
1156 }
1157
1158 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
1159 {
1160 return FN(PW,opt)(pw, 0);
1161 }
1162 #endif
1163
1164 __isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
1165 {
1166 return pw ? isl_space_copy(pw->dim) : NULL;
1167 }
1168
1169 __isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
1170 {
1171 return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
1172 }
1173
1174 #ifndef NO_RESET_DIM
1175 /* Reset the space of "pw". Since we don't know if the elements
1176 * represent the spaces themselves or their domains, we pass along
1177 * both when we call their reset_space_and_domain.
1178 */
1179 static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
1180 __isl_take isl_space *space, __isl_take isl_space *domain)
1181 {
1182 int i;
1183
1184 pw = FN(PW,cow)(pw);
1185 if (!pw || !space || !domain)
1186 goto error;
1187
1188 for (i = 0; i < pw->n; ++i) {
1189 pw->p[i].set = isl_set_reset_space(pw->p[i].set,
1190 isl_space_copy(domain));
1191 if (!pw->p[i].set)
1192 goto error;
1193 pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
1194 isl_space_copy(space), isl_space_copy(domain));
1195 if (!pw->p[i].FIELD)
1196 goto error;
1197 }
1198
1199 isl_space_free(domain);
1200
1201 isl_space_free(pw->dim);
1202 pw->dim = space;
1203
1204 return pw;
1205 error:
1206 isl_space_free(domain);
1207 isl_space_free(space);
1208 FN(PW,free)(pw);
1209 return NULL;
1210 }
1211
1212 __isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
1213 __isl_take isl_space *domain)
1214 {
1215 isl_space *space;
1216
1217 space = isl_space_extend_domain_with_range(isl_space_copy(domain),
1218 FN(PW,get_space)(pw));
1219 return FN(PW,reset_space_and_domain)(pw, space, domain);
1220 }
1221
1222 __isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
1223 {
1224 isl_space *domain;
1225
1226 domain = isl_space_domain(isl_space_copy(dim));
1227 return FN(PW,reset_space_and_domain)(pw, dim, domain);
1228 }
1229
1230 __isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
1231 __isl_take isl_id *id)
1232 {
1233 isl_space *space;
1234
1235 pw = FN(PW,cow)(pw);
1236 if (!pw)
1237 return isl_id_free(id);
1238
1239 space = FN(PW,get_space)(pw);
1240 space = isl_space_set_tuple_id(space, type, id);
1241
1242 return FN(PW,reset_space)(pw, space);
1243 }
1244
1245 __isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
1246 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1247 {
1248 pw = FN(PW,cow)(pw);
1249 if (!pw)
1250 return isl_id_free(id);
1251 pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
1252 return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
1253 }
1254 #endif
1255
1256 int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1257 {
1258 if (!pw1 || !pw2)
1259 return -1;
1260
1261 return isl_space_is_equal(pw1->dim, pw2->dim);
1262 }
1263
1264 #ifndef NO_MORPH
1265 __isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
1266 __isl_take isl_morph *morph)
1267 {
1268 int i;
1269 isl_ctx *ctx;
1270
1271 if (!pw || !morph)
1272 goto error;
1273
1274 ctx = isl_space_get_ctx(pw->dim);
1275 isl_assert(ctx, isl_space_is_domain(morph->dom->dim, pw->dim),
1276 goto error);
1277
1278 pw = FN(PW,cow)(pw);
1279 if (!pw)
1280 goto error;
1281 pw->dim = isl_space_extend_domain_with_range(
1282 isl_space_copy(morph->ran->dim), pw->dim);
1283 if (!pw->dim)
1284 goto error;
1285
1286 for (i = 0; i < pw->n; ++i) {
1287 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
1288 if (!pw->p[i].set)
1289 goto error;
1290 pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
1291 isl_morph_copy(morph));
1292 if (!pw->p[i].FIELD)
1293 goto error;
1294 }
1295
1296 isl_morph_free(morph);
1297
1298 return pw;
1299 error:
1300 FN(PW,free)(pw);
1301 isl_morph_free(morph);
1302 return NULL;
1303 }
1304 #endif
1305
1306 int FN(PW,foreach_piece)(__isl_keep PW *pw,
1307 int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
1308 void *user)
1309 {
1310 int i;
1311
1312 if (!pw)
1313 return -1;
1314
1315 for (i = 0; i < pw->n; ++i)
1316 if (fn(isl_set_copy(pw->p[i].set),
1317 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
1318 return -1;
1319
1320 return 0;
1321 }
1322
1323 #ifndef NO_LIFT
1324 static int any_divs(__isl_keep isl_set *set)
1325 {
1326 int i;
1327
1328 if (!set)
1329 return -1;
1330
1331 for (i = 0; i < set->n; ++i)
1332 if (set->p[i]->n_div > 0)
1333 return 1;
1334
1335 return 0;
1336 }
1337
1338 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
1339 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1340 void *user), void *user)
1341 {
1342 int i;
1343
1344 if (!set || !el)
1345 goto error;
1346
1347 for (i = 0; i < set->n; ++i) {
1348 isl_set *lift;
1349 EL *copy;
1350
1351 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
1352 lift = isl_set_lift(lift);
1353
1354 copy = FN(EL,copy)(el);
1355 copy = FN(EL,lift)(copy, isl_set_get_space(lift));
1356
1357 if (fn(lift, copy, user) < 0)
1358 goto error;
1359 }
1360
1361 isl_set_free(set);
1362 FN(EL,free)(el);
1363
1364 return 0;
1365 error:
1366 isl_set_free(set);
1367 FN(EL,free)(el);
1368 return -1;
1369 }
1370
1371 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
1372 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1373 void *user), void *user)
1374 {
1375 int i;
1376
1377 if (!pw)
1378 return -1;
1379
1380 for (i = 0; i < pw->n; ++i) {
1381 isl_set *set;
1382 EL *el;
1383
1384 set = isl_set_copy(pw->p[i].set);
1385 el = FN(EL,copy)(pw->p[i].FIELD);
1386 if (!any_divs(set)) {
1387 if (fn(set, el, user) < 0)
1388 return -1;
1389 continue;
1390 }
1391 if (foreach_lifted_subset(set, el, fn, user) < 0)
1392 return -1;
1393 }
1394
1395 return 0;
1396 }
1397 #endif
1398
1399 #ifndef NO_MOVE_DIMS
1400 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
1401 enum isl_dim_type dst_type, unsigned dst_pos,
1402 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1403 {
1404 int i;
1405
1406 pw = FN(PW,cow)(pw);
1407 if (!pw)
1408 return NULL;
1409
1410 pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
1411 if (!pw->dim)
1412 goto error;
1413
1414 for (i = 0; i < pw->n; ++i) {
1415 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
1416 dst_type, dst_pos, src_type, src_pos, n);
1417 if (!pw->p[i].FIELD)
1418 goto error;
1419 }
1420
1421 if (dst_type == isl_dim_in)
1422 dst_type = isl_dim_set;
1423 if (src_type == isl_dim_in)
1424 src_type = isl_dim_set;
1425
1426 for (i = 0; i < pw->n; ++i) {
1427 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
1428 dst_type, dst_pos,
1429 src_type, src_pos, n);
1430 if (!pw->p[i].set)
1431 goto error;
1432 }
1433
1434 return pw;
1435 error:
1436 FN(PW,free)(pw);
1437 return NULL;
1438 }
1439 #endif
1440
1441 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
1442 {
1443 int i;
1444
1445 if (isl_int_is_one(v))
1446 return pw;
1447 if (pw && DEFAULT_IS_ZERO && isl_int_is_zero(v)) {
1448 PW *zero;
1449 isl_space *dim = FN(PW,get_space)(pw);
1450 #ifdef HAS_TYPE
1451 zero = FN(PW,ZERO)(dim, pw->type);
1452 #else
1453 zero = FN(PW,ZERO)(dim);
1454 #endif
1455 FN(PW,free)(pw);
1456 return zero;
1457 }
1458 pw = FN(PW,cow)(pw);
1459 if (!pw)
1460 return NULL;
1461 if (pw->n == 0)
1462 return pw;
1463
1464 #ifdef HAS_TYPE
1465 if (isl_int_is_neg(v))
1466 pw->type = isl_fold_type_negate(pw->type);
1467 #endif
1468 for (i = 0; i < pw->n; ++i) {
1469 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1470 if (!pw->p[i].FIELD)
1471 goto error;
1472 }
1473
1474 return pw;
1475 error:
1476 FN(PW,free)(pw);
1477 return NULL;
1478 }
1479
1480 __isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
1481 {
1482 return FN(PW,mul_isl_int)(pw, v);
1483 }
1484
1485 static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
1486 {
1487 const isl_set *set1 = *(const isl_set **)p1;
1488 const isl_set *set2 = *(const isl_set **)p2;
1489
1490 return isl_set_plain_cmp(set1, set2);
1491 }
1492
1493 /* We normalize in place, but if anything goes wrong we need
1494 * to return NULL, so we need to make sure we don't change the
1495 * meaning of any possible other copies of map.
1496 */
1497 __isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
1498 {
1499 int i, j;
1500 isl_set *set;
1501
1502 if (!pw)
1503 return NULL;
1504 for (i = 0; i < pw->n; ++i) {
1505 set = isl_set_normalize(isl_set_copy(pw->p[i].set));
1506 if (!set)
1507 return FN(PW,free)(pw);
1508 isl_set_free(pw->p[i].set);
1509 pw->p[i].set = set;
1510 }
1511 qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
1512 for (i = pw->n - 1; i >= 1; --i) {
1513 if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
1514 continue;
1515 if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
1516 continue;
1517 set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
1518 isl_set_copy(pw->p[i].set));
1519 if (!set)
1520 return FN(PW,free)(pw);
1521 isl_set_free(pw->p[i].set);
1522 FN(EL,free)(pw->p[i].FIELD);
1523 isl_set_free(pw->p[i - 1].set);
1524 pw->p[i - 1].set = set;
1525 for (j = i + 1; j < pw->n; ++j)
1526 pw->p[j - 1] = pw->p[j];
1527 pw->n--;
1528 }
1529
1530 return pw;
1531 }
1532
1533 /* Is pw1 obviously equal to pw2?
1534 * That is, do they have obviously identical cells and obviously identical
1535 * elements on each cell?
1536 */
1537 int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1538 {
1539 int i;
1540 int equal;
1541
1542 if (!pw1 || !pw2)
1543 return -1;
1544
1545 if (pw1 == pw2)
1546 return 1;
1547 if (!isl_space_is_equal(pw1->dim, pw2->dim))
1548 return 0;
1549
1550 pw1 = FN(PW,copy)(pw1);
1551 pw2 = FN(PW,copy)(pw2);
1552 pw1 = FN(PW,normalize)(pw1);
1553 pw2 = FN(PW,normalize)(pw2);
1554 if (!pw1 || !pw2)
1555 goto error;
1556
1557 equal = pw1->n == pw2->n;
1558 for (i = 0; equal && i < pw1->n; ++i) {
1559 equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
1560 if (equal < 0)
1561 goto error;
1562 if (!equal)
1563 break;
1564 equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
1565 if (equal < 0)
1566 goto error;
1567 }
1568
1569 FN(PW,free)(pw1);
1570 FN(PW,free)(pw2);
1571 return equal;
1572 error:
1573 FN(PW,free)(pw1);
1574 FN(PW,free)(pw2);
1575 return -1;
1576 }
Integer set library