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add isl_local_space_intersect
[isl.git] / isl_pw_templ.c
blob03d64ccd16ce5081d9b95e7ad2b5e0e867fc8877
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 __isl_give isl_id *FN(PW,get_dim_id)(__isl_keep PW *pw, enum isl_dim_type type,
183 unsigned pos)
184 {
185 return pw ? isl_space_get_dim_id(pw->dim, type, pos) : NULL;
186 }
187
188 const char *FN(PW,get_tuple_name)(__isl_keep PW *pw, enum isl_dim_type type)
189 {
190 return pw ? isl_space_get_tuple_name(pw->dim, type) : NULL;
191 }
192
193 int FN(PW,has_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
194 {
195 return pw ? isl_space_has_tuple_id(pw->dim, type) : -1;
196 }
197
198 __isl_give isl_id *FN(PW,get_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
199 {
200 return pw ? isl_space_get_tuple_id(pw->dim, type) : NULL;
201 }
202
203 int FN(PW,IS_ZERO)(__isl_keep PW *pw)
204 {
205 if (!pw)
206 return -1;
207
208 return pw->n == 0;
209 }
210
211 #ifndef NO_REALIGN
212 __isl_give PW *FN(PW,realign_domain)(__isl_take PW *pw,
213 __isl_take isl_reordering *exp)
214 {
215 int i;
216
217 pw = FN(PW,cow)(pw);
218 if (!pw || !exp)
219 return NULL;
220
221 for (i = 0; i < pw->n; ++i) {
222 pw->p[i].set = isl_set_realign(pw->p[i].set,
223 isl_reordering_copy(exp));
224 if (!pw->p[i].set)
225 goto error;
226 pw->p[i].FIELD = FN(EL,realign_domain)(pw->p[i].FIELD,
227 isl_reordering_copy(exp));
228 if (!pw->p[i].FIELD)
229 goto error;
230 }
231
232 pw = FN(PW,reset_domain_space)(pw, isl_space_copy(exp->dim));
233
234 isl_reordering_free(exp);
235 return pw;
236 error:
237 isl_reordering_free(exp);
238 FN(PW,free)(pw);
239 return NULL;
240 }
241
242 /* Align the parameters of "pw" to those of "model".
243 */
244 __isl_give PW *FN(PW,align_params)(__isl_take PW *pw, __isl_take isl_space *model)
245 {
246 isl_ctx *ctx;
247
248 if (!pw || !model)
249 goto error;
250
251 ctx = isl_space_get_ctx(model);
252 if (!isl_space_has_named_params(model))
253 isl_die(ctx, isl_error_invalid,
254 "model has unnamed parameters", goto error);
255 if (!isl_space_has_named_params(pw->dim))
256 isl_die(ctx, isl_error_invalid,
257 "input has unnamed parameters", goto error);
258 if (!isl_space_match(pw->dim, isl_dim_param, model, isl_dim_param)) {
259 isl_reordering *exp;
260
261 model = isl_space_drop_dims(model, isl_dim_in,
262 0, isl_space_dim(model, isl_dim_in));
263 model = isl_space_drop_dims(model, isl_dim_out,
264 0, isl_space_dim(model, isl_dim_out));
265 exp = isl_parameter_alignment_reordering(pw->dim, model);
266 exp = isl_reordering_extend_space(exp,
267 FN(PW,get_domain_space)(pw));
268 pw = FN(PW,realign_domain)(pw, exp);
269 }
270
271 isl_space_free(model);
272 return pw;
273 error:
274 isl_space_free(model);
275 FN(PW,free)(pw);
276 return NULL;
277 }
278
279 static __isl_give PW *FN(PW,align_params_pw_pw_and)(__isl_take PW *pw1,
280 __isl_take PW *pw2,
281 __isl_give PW *(*fn)(__isl_take PW *pw1, __isl_take PW *pw2))
282 {
283 isl_ctx *ctx;
284
285 if (!pw1 || !pw2)
286 goto error;
287 if (isl_space_match(pw1->dim, isl_dim_param, pw2->dim, isl_dim_param))
288 return fn(pw1, pw2);
289 ctx = FN(PW,get_ctx)(pw1);
290 if (!isl_space_has_named_params(pw1->dim) ||
291 !isl_space_has_named_params(pw2->dim))
292 isl_die(ctx, isl_error_invalid,
293 "unaligned unnamed parameters", goto error);
294 pw1 = FN(PW,align_params)(pw1, FN(PW,get_space)(pw2));
295 pw2 = FN(PW,align_params)(pw2, FN(PW,get_space)(pw1));
296 return fn(pw1, pw2);
297 error:
298 FN(PW,free)(pw1);
299 FN(PW,free)(pw2);
300 return NULL;
301 }
302
303 static __isl_give PW *FN(PW,align_params_pw_set_and)(__isl_take PW *pw,
304 __isl_take isl_set *set,
305 __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_set *set))
306 {
307 isl_ctx *ctx;
308
309 if (!pw || !set)
310 goto error;
311 if (isl_space_match(pw->dim, isl_dim_param, set->dim, isl_dim_param))
312 return fn(pw, set);
313 ctx = FN(PW,get_ctx)(pw);
314 if (!isl_space_has_named_params(pw->dim) ||
315 !isl_space_has_named_params(set->dim))
316 isl_die(ctx, isl_error_invalid,
317 "unaligned unnamed parameters", goto error);
318 pw = FN(PW,align_params)(pw, isl_set_get_space(set));
319 set = isl_set_align_params(set, FN(PW,get_space)(pw));
320 return fn(pw, set);
321 error:
322 FN(PW,free)(pw);
323 isl_set_free(set);
324 return NULL;
325 }
326 #endif
327
328 static __isl_give PW *FN(PW,add_aligned)(__isl_take PW *pw1, __isl_take PW *pw2)
329 {
330 int i, j, n;
331 struct PW *res;
332 isl_ctx *ctx;
333 isl_set *set;
334
335 if (!pw1 || !pw2)
336 goto error;
337
338 ctx = isl_space_get_ctx(pw1->dim);
339 #ifdef HAS_TYPE
340 if (pw1->type != pw2->type)
341 isl_die(ctx, isl_error_invalid,
342 "fold types don't match", goto error);
343 #endif
344 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
345
346 if (FN(PW,IS_ZERO)(pw1)) {
347 FN(PW,free)(pw1);
348 return pw2;
349 }
350
351 if (FN(PW,IS_ZERO)(pw2)) {
352 FN(PW,free)(pw2);
353 return pw1;
354 }
355
356 n = (pw1->n + 1) * (pw2->n + 1);
357 #ifdef HAS_TYPE
358 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
359 #else
360 res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
361 #endif
362
363 for (i = 0; i < pw1->n; ++i) {
364 set = isl_set_copy(pw1->p[i].set);
365 for (j = 0; j < pw2->n; ++j) {
366 struct isl_set *common;
367 EL *sum;
368 set = isl_set_subtract(set,
369 isl_set_copy(pw2->p[j].set));
370 common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
371 isl_set_copy(pw2->p[j].set));
372 if (isl_set_plain_is_empty(common)) {
373 isl_set_free(common);
374 continue;
375 }
376
377 sum = FN(EL,add_on_domain)(common,
378 FN(EL,copy)(pw1->p[i].FIELD),
379 FN(EL,copy)(pw2->p[j].FIELD));
380
381 res = FN(PW,add_piece)(res, common, sum);
382 }
383 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw1->p[i].FIELD));
384 }
385
386 for (j = 0; j < pw2->n; ++j) {
387 set = isl_set_copy(pw2->p[j].set);
388 for (i = 0; i < pw1->n; ++i)
389 set = isl_set_subtract(set,
390 isl_set_copy(pw1->p[i].set));
391 res = FN(PW,add_piece)(res, set, FN(EL,copy)(pw2->p[j].FIELD));
392 }
393
394 FN(PW,free)(pw1);
395 FN(PW,free)(pw2);
396
397 return res;
398 error:
399 FN(PW,free)(pw1);
400 FN(PW,free)(pw2);
401 return NULL;
402 }
403
404 __isl_give PW *FN(PW,add)(__isl_take PW *pw1, __isl_take PW *pw2)
405 {
406 return FN(PW,align_params_pw_pw_and)(pw1, pw2, &FN(PW,add_aligned));
407 }
408
409 /* Make sure "pw" has room for at least "n" more pieces.
410 *
411 * If there is only one reference to pw, we extend it in place.
412 * Otherwise, we create a new PW and copy the pieces.
413 */
414 static __isl_give PW *FN(PW,grow)(__isl_take PW *pw, int n)
415 {
416 int i;
417 isl_ctx *ctx;
418 PW *res;
419
420 if (!pw)
421 return NULL;
422 if (pw->n + n <= pw->size)
423 return pw;
424 ctx = FN(PW,get_ctx)(pw);
425 n += pw->n;
426 if (pw->ref == 1) {
427 res = isl_realloc(ctx, pw, struct PW,
428 sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
429 if (!res)
430 return FN(PW,free)(pw);
431 res->size = n;
432 return res;
433 }
434 #ifdef HAS_TYPE
435 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, n);
436 #else
437 res = FN(PW,alloc_size)(isl_space_copy(pw->dim), n);
438 #endif
439 if (!res)
440 return FN(PW,free)(pw);
441 for (i = 0; i < pw->n; ++i)
442 res = FN(PW,add_piece)(res, isl_set_copy(pw->p[i].set),
443 FN(EL,copy)(pw->p[i].FIELD));
444 FN(PW,free)(pw);
445 return res;
446 }
447
448 static __isl_give PW *FN(PW,add_disjoint_aligned)(__isl_take PW *pw1,
449 __isl_take PW *pw2)
450 {
451 int i;
452 isl_ctx *ctx;
453
454 if (!pw1 || !pw2)
455 goto error;
456
457 if (pw1->size < pw1->n + pw2->n && pw1->n < pw2->n)
458 return FN(PW,add_disjoint_aligned)(pw2, pw1);
459
460 ctx = isl_space_get_ctx(pw1->dim);
461 #ifdef HAS_TYPE
462 if (pw1->type != pw2->type)
463 isl_die(ctx, isl_error_invalid,
464 "fold types don't match", goto error);
465 #endif
466 isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
467
468 if (FN(PW,IS_ZERO)(pw1)) {
469 FN(PW,free)(pw1);
470 return pw2;
471 }
472
473 if (FN(PW,IS_ZERO)(pw2)) {
474 FN(PW,free)(pw2);
475 return pw1;
476 }
477
478 pw1 = FN(PW,grow)(pw1, pw2->n);
479 if (!pw1)
480 goto error;
481
482 for (i = 0; i < pw2->n; ++i)
483 pw1 = FN(PW,add_piece)(pw1,
484 isl_set_copy(pw2->p[i].set),
485 FN(EL,copy)(pw2->p[i].FIELD));
486
487 FN(PW,free)(pw2);
488
489 return pw1;
490 error:
491 FN(PW,free)(pw1);
492 FN(PW,free)(pw2);
493 return NULL;
494 }
495
496 __isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
497 {
498 return FN(PW,align_params_pw_pw_and)(pw1, pw2,
499 &FN(PW,add_disjoint_aligned));
500 }
501
502 #ifndef NO_NEG
503 __isl_give PW *FN(PW,neg)(__isl_take PW *pw)
504 {
505 int i;
506
507 if (!pw)
508 return NULL;
509
510 if (FN(PW,IS_ZERO)(pw))
511 return pw;
512
513 pw = FN(PW,cow)(pw);
514 if (!pw)
515 return NULL;
516
517 for (i = 0; i < pw->n; ++i) {
518 pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
519 if (!pw->p[i].FIELD)
520 return FN(PW,free)(pw);
521 }
522
523 return pw;
524 }
525
526 __isl_give PW *FN(PW,sub)(__isl_take PW *pw1, __isl_take PW *pw2)
527 {
528 return FN(PW,add)(pw1, FN(PW,neg)(pw2));
529 }
530 #endif
531
532 #ifndef NO_EVAL
533 __isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
534 __isl_take isl_point *pnt)
535 {
536 int i;
537 int found = 0;
538 isl_ctx *ctx;
539 isl_space *pnt_dim = NULL;
540 isl_qpolynomial *qp;
541
542 if (!pw || !pnt)
543 goto error;
544 ctx = isl_point_get_ctx(pnt);
545 pnt_dim = isl_point_get_space(pnt);
546 isl_assert(ctx, isl_space_is_domain(pnt_dim, pw->dim), goto error);
547
548 for (i = 0; i < pw->n; ++i) {
549 found = isl_set_contains_point(pw->p[i].set, pnt);
550 if (found < 0)
551 goto error;
552 if (found)
553 break;
554 }
555 if (found)
556 qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
557 isl_point_copy(pnt));
558 else
559 qp = isl_qpolynomial_zero_on_domain(FN(PW,get_domain_space)(pw));
560 FN(PW,free)(pw);
561 isl_space_free(pnt_dim);
562 isl_point_free(pnt);
563 return qp;
564 error:
565 FN(PW,free)(pw);
566 isl_space_free(pnt_dim);
567 isl_point_free(pnt);
568 return NULL;
569 }
570 #endif
571
572 __isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
573 {
574 int i;
575 isl_set *dom;
576
577 if (!pw)
578 return NULL;
579
580 dom = isl_set_empty(FN(PW,get_domain_space)(pw));
581 for (i = 0; i < pw->n; ++i)
582 dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
583
584 FN(PW,free)(pw);
585
586 return dom;
587 }
588
589 static __isl_give PW *FN(PW,intersect_domain_aligned)(__isl_take PW *pw,
590 __isl_take isl_set *set)
591 {
592 int i;
593
594 if (!pw || !set)
595 goto error;
596
597 if (pw->n == 0) {
598 isl_set_free(set);
599 return pw;
600 }
601
602 pw = FN(PW,cow)(pw);
603 if (!pw)
604 goto error;
605
606 for (i = pw->n - 1; i >= 0; --i) {
607 isl_basic_set *aff;
608 pw->p[i].set = isl_set_intersect(pw->p[i].set, isl_set_copy(set));
609 if (!pw->p[i].set)
610 goto error;
611 aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
612 pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
613 aff);
614 if (isl_set_plain_is_empty(pw->p[i].set)) {
615 isl_set_free(pw->p[i].set);
616 FN(EL,free)(pw->p[i].FIELD);
617 if (i != pw->n - 1)
618 pw->p[i] = pw->p[pw->n - 1];
619 pw->n--;
620 }
621 }
622
623 isl_set_free(set);
624 return pw;
625 error:
626 isl_set_free(set);
627 FN(PW,free)(pw);
628 return NULL;
629 }
630
631 __isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw,
632 __isl_take isl_set *context)
633 {
634 return FN(PW,align_params_pw_set_and)(pw, context,
635 &FN(PW,intersect_domain_aligned));
636 }
637
638 static __isl_give PW *FN(PW,gist_aligned)(__isl_take PW *pw,
639 __isl_take isl_set *context)
640 {
641 int i;
642 isl_basic_set *hull = NULL;
643
644 if (!pw || !context)
645 goto error;
646
647 if (pw->n == 0) {
648 isl_set_free(context);
649 return pw;
650 }
651
652 if (!isl_space_match(pw->dim, isl_dim_param,
653 context->dim, isl_dim_param)) {
654 pw = FN(PW,align_params)(pw, isl_set_get_space(context));
655 context = isl_set_align_params(context, FN(PW,get_space)(pw));
656 }
657
658 context = isl_set_compute_divs(context);
659 hull = isl_set_simple_hull(isl_set_copy(context));
660
661 pw = FN(PW,cow)(pw);
662 if (!pw)
663 goto error;
664
665 for (i = pw->n - 1; i >= 0; --i) {
666 pw->p[i].set = isl_set_intersect(pw->p[i].set,
667 isl_set_copy(context));
668 if (!pw->p[i].set)
669 goto error;
670 pw->p[i].FIELD = FN(EL,gist)(pw->p[i].FIELD,
671 isl_set_copy(pw->p[i].set));
672 pw->p[i].set = isl_set_gist_basic_set(pw->p[i].set,
673 isl_basic_set_copy(hull));
674 if (!pw->p[i].set)
675 goto error;
676 if (isl_set_plain_is_empty(pw->p[i].set)) {
677 isl_set_free(pw->p[i].set);
678 FN(EL,free)(pw->p[i].FIELD);
679 if (i != pw->n - 1)
680 pw->p[i] = pw->p[pw->n - 1];
681 pw->n--;
682 }
683 }
684
685 isl_basic_set_free(hull);
686 isl_set_free(context);
687
688 return pw;
689 error:
690 FN(PW,free)(pw);
691 isl_basic_set_free(hull);
692 isl_set_free(context);
693 return NULL;
694 }
695
696 __isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
697 {
698 return FN(PW,align_params_pw_set_and)(pw, context, &FN(PW,gist_aligned));
699 }
700
701 __isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
702 {
703 int i, j;
704
705 if (!pw)
706 return NULL;
707 if (pw->n == 0)
708 return pw;
709
710 for (i = pw->n - 1; i >= 0; --i) {
711 for (j = i - 1; j >= 0; --j) {
712 if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
713 pw->p[j].FIELD))
714 continue;
715 pw->p[j].set = isl_set_union(pw->p[j].set,
716 pw->p[i].set);
717 FN(EL,free)(pw->p[i].FIELD);
718 if (i != pw->n - 1)
719 pw->p[i] = pw->p[pw->n - 1];
720 pw->n--;
721 break;
722 }
723 if (j >= 0)
724 continue;
725 pw->p[i].set = isl_set_coalesce(pw->p[i].set);
726 if (!pw->p[i].set)
727 goto error;
728 }
729
730 return pw;
731 error:
732 FN(PW,free)(pw);
733 return NULL;
734 }
735
736 isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
737 {
738 return pw ? isl_space_get_ctx(pw->dim) : NULL;
739 }
740
741 #ifndef NO_INVOLVES_DIMS
742 int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
743 unsigned first, unsigned n)
744 {
745 int i;
746 enum isl_dim_type set_type;
747
748 if (!pw)
749 return -1;
750 if (pw->n == 0 || n == 0)
751 return 0;
752
753 set_type = type == isl_dim_in ? isl_dim_set : type;
754
755 for (i = 0; i < pw->n; ++i) {
756 int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
757 type, first, n);
758 if (involves < 0 || involves)
759 return involves;
760 involves = isl_set_involves_dims(pw->p[i].set,
761 set_type, first, n);
762 if (involves < 0 || involves)
763 return involves;
764 }
765 return 0;
766 }
767 #endif
768
769 __isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
770 enum isl_dim_type type, unsigned pos, const char *s)
771 {
772 int i;
773 enum isl_dim_type set_type;
774
775 pw = FN(PW,cow)(pw);
776 if (!pw)
777 return NULL;
778
779 set_type = type == isl_dim_in ? isl_dim_set : type;
780
781 pw->dim = isl_space_set_dim_name(pw->dim, type, pos, s);
782 if (!pw->dim)
783 goto error;
784
785 for (i = 0; i < pw->n; ++i) {
786 pw->p[i].set = isl_set_set_dim_name(pw->p[i].set,
787 set_type, pos, s);
788 if (!pw->p[i].set)
789 goto error;
790 pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
791 if (!pw->p[i].FIELD)
792 goto error;
793 }
794
795 return pw;
796 error:
797 FN(PW,free)(pw);
798 return NULL;
799 }
800
801 #ifndef NO_DROP_DIMS
802 __isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
803 enum isl_dim_type type, unsigned first, unsigned n)
804 {
805 int i;
806 enum isl_dim_type set_type;
807
808 if (!pw)
809 return NULL;
810 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
811 return pw;
812
813 set_type = type == isl_dim_in ? isl_dim_set : type;
814
815 pw = FN(PW,cow)(pw);
816 if (!pw)
817 return NULL;
818 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
819 if (!pw->dim)
820 goto error;
821 for (i = 0; i < pw->n; ++i) {
822 pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
823 if (!pw->p[i].set)
824 goto error;
825 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
826 if (!pw->p[i].FIELD)
827 goto error;
828 }
829
830 return pw;
831 error:
832 FN(PW,free)(pw);
833 return NULL;
834 }
835
836 /* This function is very similar to drop_dims.
837 * The only difference is that the cells may still involve
838 * the specified dimensions. They are removed using
839 * isl_set_project_out instead of isl_set_drop.
840 */
841 __isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
842 enum isl_dim_type type, unsigned first, unsigned n)
843 {
844 int i;
845 enum isl_dim_type set_type;
846
847 if (!pw)
848 return NULL;
849 if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
850 return pw;
851
852 set_type = type == isl_dim_in ? isl_dim_set : type;
853
854 pw = FN(PW,cow)(pw);
855 if (!pw)
856 return NULL;
857 pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
858 if (!pw->dim)
859 goto error;
860 for (i = 0; i < pw->n; ++i) {
861 pw->p[i].set = isl_set_project_out(pw->p[i].set,
862 set_type, first, n);
863 if (!pw->p[i].set)
864 goto error;
865 pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
866 if (!pw->p[i].FIELD)
867 goto error;
868 }
869
870 return pw;
871 error:
872 FN(PW,free)(pw);
873 return NULL;
874 }
875
876 /* Project the domain of pw onto its parameter space.
877 */
878 __isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
879 {
880 isl_space *space;
881 unsigned n;
882
883 n = FN(PW,dim)(pw, isl_dim_in);
884 pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
885 space = FN(PW,get_domain_space)(pw);
886 space = isl_space_params(space);
887 pw = FN(PW,reset_domain_space)(pw, space);
888 return pw;
889 }
890 #endif
891
892 #ifndef NO_INSERT_DIMS
893 __isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
894 unsigned first, unsigned n)
895 {
896 int i;
897 enum isl_dim_type set_type;
898
899 if (!pw)
900 return NULL;
901 if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
902 return pw;
903
904 set_type = type == isl_dim_in ? isl_dim_set : type;
905
906 pw = FN(PW,cow)(pw);
907 if (!pw)
908 return NULL;
909
910 pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
911 if (!pw->dim)
912 goto error;
913
914 for (i = 0; i < pw->n; ++i) {
915 pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
916 set_type, first, n);
917 if (!pw->p[i].set)
918 goto error;
919 pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
920 type, first, n);
921 if (!pw->p[i].FIELD)
922 goto error;
923 }
924
925 return pw;
926 error:
927 FN(PW,free)(pw);
928 return NULL;
929 }
930 #endif
931
932 __isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
933 enum isl_dim_type type, unsigned pos, isl_int v)
934 {
935 int i;
936
937 if (!pw)
938 return NULL;
939
940 if (type == isl_dim_in)
941 type = isl_dim_set;
942
943 pw = FN(PW,cow)(pw);
944 if (!pw)
945 return NULL;
946 for (i = 0; i < pw->n; ++i) {
947 pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
948 if (!pw->p[i].set)
949 goto error;
950 }
951
952 return pw;
953 error:
954 FN(PW,free)(pw);
955 return NULL;
956 }
957
958 unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
959 {
960 return pw ? isl_space_dim(pw->dim, type) : 0;
961 }
962
963 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
964 enum isl_dim_type type, unsigned first, unsigned n)
965 {
966 int i;
967
968 if (!pw)
969 return NULL;
970 if (n == 0)
971 return pw;
972
973 if (type == isl_dim_in)
974 type = isl_dim_set;
975
976 pw = FN(PW,cow)(pw);
977 if (!pw)
978 return NULL;
979 if (!pw->dim)
980 goto error;
981 for (i = 0; i < pw->n; ++i) {
982 pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
983 if (!pw->p[i].set)
984 goto error;
985 }
986
987 return pw;
988 error:
989 FN(PW,free)(pw);
990 return NULL;
991 }
992
993 #ifndef NO_OPT
994 /* Compute the maximal value attained by the piecewise quasipolynomial
995 * on its domain or zero if the domain is empty.
996 * In the worst case, the domain is scanned completely,
997 * so the domain is assumed to be bounded.
998 */
999 __isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
1000 {
1001 int i;
1002 isl_qpolynomial *opt;
1003
1004 if (!pw)
1005 return NULL;
1006
1007 if (pw->n == 0) {
1008 isl_space *dim = isl_space_copy(pw->dim);
1009 FN(PW,free)(pw);
1010 return isl_qpolynomial_zero_on_domain(dim);
1011 }
1012
1013 opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
1014 isl_set_copy(pw->p[0].set), max);
1015 for (i = 1; i < pw->n; ++i) {
1016 isl_qpolynomial *opt_i;
1017 opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
1018 isl_set_copy(pw->p[i].set), max);
1019 if (max)
1020 opt = isl_qpolynomial_max_cst(opt, opt_i);
1021 else
1022 opt = isl_qpolynomial_min_cst(opt, opt_i);
1023 }
1024
1025 FN(PW,free)(pw);
1026 return opt;
1027 }
1028
1029 __isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
1030 {
1031 return FN(PW,opt)(pw, 1);
1032 }
1033
1034 __isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
1035 {
1036 return FN(PW,opt)(pw, 0);
1037 }
1038 #endif
1039
1040 __isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
1041 {
1042 return pw ? isl_space_copy(pw->dim) : NULL;
1043 }
1044
1045 __isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
1046 {
1047 return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
1048 }
1049
1050 #ifndef NO_RESET_DIM
1051 /* Reset the space of "pw". Since we don't know if the elements
1052 * represent the spaces themselves or their domains, we pass along
1053 * both when we call their reset_space_and_domain.
1054 */
1055 static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
1056 __isl_take isl_space *space, __isl_take isl_space *domain)
1057 {
1058 int i;
1059
1060 pw = FN(PW,cow)(pw);
1061 if (!pw || !space || !domain)
1062 goto error;
1063
1064 for (i = 0; i < pw->n; ++i) {
1065 pw->p[i].set = isl_set_reset_space(pw->p[i].set,
1066 isl_space_copy(domain));
1067 if (!pw->p[i].set)
1068 goto error;
1069 pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
1070 isl_space_copy(space), isl_space_copy(domain));
1071 if (!pw->p[i].FIELD)
1072 goto error;
1073 }
1074
1075 isl_space_free(domain);
1076
1077 isl_space_free(pw->dim);
1078 pw->dim = space;
1079
1080 return pw;
1081 error:
1082 isl_space_free(domain);
1083 isl_space_free(space);
1084 FN(PW,free)(pw);
1085 return NULL;
1086 }
1087
1088 __isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
1089 __isl_take isl_space *domain)
1090 {
1091 isl_space *space;
1092
1093 space = isl_space_extend_domain_with_range(isl_space_copy(domain),
1094 FN(PW,get_space)(pw));
1095 return FN(PW,reset_space_and_domain)(pw, space, domain);
1096 }
1097
1098 __isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
1099 {
1100 isl_space *domain;
1101
1102 domain = isl_space_domain(isl_space_copy(dim));
1103 return FN(PW,reset_space_and_domain)(pw, dim, domain);
1104 }
1105
1106 __isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
1107 __isl_take isl_id *id)
1108 {
1109 isl_space *space;
1110
1111 pw = FN(PW,cow)(pw);
1112 if (!pw)
1113 return isl_id_free(id);
1114
1115 space = FN(PW,get_space)(pw);
1116 space = isl_space_set_tuple_id(space, type, id);
1117
1118 return FN(PW,reset_space)(pw, space);
1119 }
1120
1121 __isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
1122 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1123 {
1124 pw = FN(PW,cow)(pw);
1125 if (!pw)
1126 return isl_id_free(id);
1127 pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
1128 return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
1129 }
1130 #endif
1131
1132 int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1133 {
1134 if (!pw1 || !pw2)
1135 return -1;
1136
1137 return isl_space_is_equal(pw1->dim, pw2->dim);
1138 }
1139
1140 #ifndef NO_MORPH
1141 __isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
1142 __isl_take isl_morph *morph)
1143 {
1144 int i;
1145 isl_ctx *ctx;
1146
1147 if (!pw || !morph)
1148 goto error;
1149
1150 ctx = isl_space_get_ctx(pw->dim);
1151 isl_assert(ctx, isl_space_is_domain(morph->dom->dim, pw->dim),
1152 goto error);
1153
1154 pw = FN(PW,cow)(pw);
1155 if (!pw)
1156 goto error;
1157 pw->dim = isl_space_extend_domain_with_range(
1158 isl_space_copy(morph->ran->dim), pw->dim);
1159 if (!pw->dim)
1160 goto error;
1161
1162 for (i = 0; i < pw->n; ++i) {
1163 pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
1164 if (!pw->p[i].set)
1165 goto error;
1166 pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
1167 isl_morph_copy(morph));
1168 if (!pw->p[i].FIELD)
1169 goto error;
1170 }
1171
1172 isl_morph_free(morph);
1173
1174 return pw;
1175 error:
1176 FN(PW,free)(pw);
1177 isl_morph_free(morph);
1178 return NULL;
1179 }
1180 #endif
1181
1182 int FN(PW,foreach_piece)(__isl_keep PW *pw,
1183 int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
1184 void *user)
1185 {
1186 int i;
1187
1188 if (!pw)
1189 return -1;
1190
1191 for (i = 0; i < pw->n; ++i)
1192 if (fn(isl_set_copy(pw->p[i].set),
1193 FN(EL,copy)(pw->p[i].FIELD), user) < 0)
1194 return -1;
1195
1196 return 0;
1197 }
1198
1199 #ifndef NO_LIFT
1200 static int any_divs(__isl_keep isl_set *set)
1201 {
1202 int i;
1203
1204 if (!set)
1205 return -1;
1206
1207 for (i = 0; i < set->n; ++i)
1208 if (set->p[i]->n_div > 0)
1209 return 1;
1210
1211 return 0;
1212 }
1213
1214 static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
1215 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1216 void *user), void *user)
1217 {
1218 int i;
1219
1220 if (!set || !el)
1221 goto error;
1222
1223 for (i = 0; i < set->n; ++i) {
1224 isl_set *lift;
1225 EL *copy;
1226
1227 lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
1228 lift = isl_set_lift(lift);
1229
1230 copy = FN(EL,copy)(el);
1231 copy = FN(EL,lift)(copy, isl_set_get_space(lift));
1232
1233 if (fn(lift, copy, user) < 0)
1234 goto error;
1235 }
1236
1237 isl_set_free(set);
1238 FN(EL,free)(el);
1239
1240 return 0;
1241 error:
1242 isl_set_free(set);
1243 FN(EL,free)(el);
1244 return -1;
1245 }
1246
1247 int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
1248 int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
1249 void *user), void *user)
1250 {
1251 int i;
1252
1253 if (!pw)
1254 return -1;
1255
1256 for (i = 0; i < pw->n; ++i) {
1257 isl_set *set;
1258 EL *el;
1259
1260 set = isl_set_copy(pw->p[i].set);
1261 el = FN(EL,copy)(pw->p[i].FIELD);
1262 if (!any_divs(set)) {
1263 if (fn(set, el, user) < 0)
1264 return -1;
1265 continue;
1266 }
1267 if (foreach_lifted_subset(set, el, fn, user) < 0)
1268 return -1;
1269 }
1270
1271 return 0;
1272 }
1273 #endif
1274
1275 #ifndef NO_MOVE_DIMS
1276 __isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
1277 enum isl_dim_type dst_type, unsigned dst_pos,
1278 enum isl_dim_type src_type, unsigned src_pos, unsigned n)
1279 {
1280 int i;
1281
1282 pw = FN(PW,cow)(pw);
1283 if (!pw)
1284 return NULL;
1285
1286 pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
1287 if (!pw->dim)
1288 goto error;
1289
1290 for (i = 0; i < pw->n; ++i) {
1291 pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
1292 dst_type, dst_pos, src_type, src_pos, n);
1293 if (!pw->p[i].FIELD)
1294 goto error;
1295 }
1296
1297 if (dst_type == isl_dim_in)
1298 dst_type = isl_dim_set;
1299 if (src_type == isl_dim_in)
1300 src_type = isl_dim_set;
1301
1302 for (i = 0; i < pw->n; ++i) {
1303 pw->p[i].set = isl_set_move_dims(pw->p[i].set,
1304 dst_type, dst_pos,
1305 src_type, src_pos, n);
1306 if (!pw->p[i].set)
1307 goto error;
1308 }
1309
1310 return pw;
1311 error:
1312 FN(PW,free)(pw);
1313 return NULL;
1314 }
1315 #endif
1316
1317 __isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
1318 {
1319 int i;
1320
1321 if (isl_int_is_one(v))
1322 return pw;
1323 if (pw && isl_int_is_zero(v)) {
1324 PW *zero;
1325 isl_space *dim = FN(PW,get_space)(pw);
1326 #ifdef HAS_TYPE
1327 zero = FN(PW,ZERO)(dim, pw->type);
1328 #else
1329 zero = FN(PW,ZERO)(dim);
1330 #endif
1331 FN(PW,free)(pw);
1332 return zero;
1333 }
1334 pw = FN(PW,cow)(pw);
1335 if (!pw)
1336 return NULL;
1337 if (pw->n == 0)
1338 return pw;
1339
1340 #ifdef HAS_TYPE
1341 if (isl_int_is_neg(v))
1342 pw->type = isl_fold_type_negate(pw->type);
1343 #endif
1344 for (i = 0; i < pw->n; ++i) {
1345 pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
1346 if (!pw->p[i].FIELD)
1347 goto error;
1348 }
1349
1350 return pw;
1351 error:
1352 FN(PW,free)(pw);
1353 return NULL;
1354 }
1355
1356 __isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
1357 {
1358 return FN(PW,mul_isl_int)(pw, v);
1359 }
1360
1361 static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
1362 {
1363 const isl_set *set1 = *(const isl_set **)p1;
1364 const isl_set *set2 = *(const isl_set **)p2;
1365
1366 return isl_set_plain_cmp(set1, set2);
1367 }
1368
1369 /* We normalize in place, but if anything goes wrong we need
1370 * to return NULL, so we need to make sure we don't change the
1371 * meaning of any possible other copies of map.
1372 */
1373 __isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
1374 {
1375 int i, j;
1376 isl_set *set;
1377
1378 if (!pw)
1379 return NULL;
1380 for (i = 0; i < pw->n; ++i) {
1381 set = isl_set_normalize(isl_set_copy(pw->p[i].set));
1382 if (!set)
1383 return FN(PW,free)(pw);
1384 isl_set_free(pw->p[i].set);
1385 pw->p[i].set = set;
1386 }
1387 qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
1388 for (i = pw->n - 1; i >= 1; --i) {
1389 if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
1390 continue;
1391 if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
1392 continue;
1393 set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
1394 isl_set_copy(pw->p[i].set));
1395 if (!set)
1396 return FN(PW,free)(pw);
1397 isl_set_free(pw->p[i].set);
1398 FN(EL,free)(pw->p[i].FIELD);
1399 isl_set_free(pw->p[i - 1].set);
1400 pw->p[i - 1].set = set;
1401 for (j = i + 1; j < pw->n; ++j)
1402 pw->p[j - 1] = pw->p[j];
1403 pw->n--;
1404 }
1405
1406 return pw;
1407 }
1408
1409 /* Is pw1 obviously equal to pw2?
1410 * That is, do they have obviously identical cells and obviously identical
1411 * elements on each cell?
1412 */
1413 int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
1414 {
1415 int i;
1416 int equal;
1417
1418 if (!pw1 || !pw2)
1419 return -1;
1420
1421 if (pw1 == pw2)
1422 return 1;
1423 if (!isl_space_is_equal(pw1->dim, pw2->dim))
1424 return 0;
1425
1426 pw1 = FN(PW,copy)(pw1);
1427 pw2 = FN(PW,copy)(pw2);
1428 pw1 = FN(PW,normalize)(pw1);
1429 pw2 = FN(PW,normalize)(pw2);
1430 if (!pw1 || !pw2)
1431 goto error;
1432
1433 equal = pw1->n == pw2->n;
1434 for (i = 0; equal && i < pw1->n; ++i) {
1435 equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
1436 if (equal < 0)
1437 goto error;
1438 if (!equal)
1439 break;
1440 equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
1441 if (equal < 0)
1442 goto error;
1443 }
1444
1445 FN(PW,free)(pw1);
1446 FN(PW,free)(pw2);
1447 return equal;
1448 error:
1449 FN(PW,free)(pw1);
1450 FN(PW,free)(pw2);
1451 return -1;
1452 }
Integer set library