isl_union_map.c

   1 /*
   2  * Copyright 2010      INRIA Saclay
   3  *
   4  * Use of this software is governed by the GNU LGPLv2.1 license
   5  *
   6  * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
   7  * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
   8  * 91893 Orsay, France
   9  */
  10
  11 #include <isl_ctx.h>
  12 #include <isl_hash.h>
  13 #include <isl_map.h>
  14 #include <isl_set.h>
  15 #include <isl_dim_private.h>
  16 #include <isl_union_map_private.h>
  17 #include <isl_union_set.h>
  18
  19 static __isl_give isl_union_map *isl_union_map_alloc(__isl_take isl_dim *dim,
  20         int size)
  21 {
  22         isl_union_map *umap;
  23
  24         if (!dim)
  25                 return NULL;
  26
  27         umap = isl_calloc_type(dim->ctx, isl_union_map);
  28         if (!umap)
  29                 return NULL;
  30
  31         umap->ref = 1;
  32         umap->dim = dim;
  33         if (isl_hash_table_init(dim->ctx, &umap->table, size) < 0)
  34                 goto error;
  35
  36         return umap;
  37 error:
  38         isl_dim_free(dim);
  39         isl_union_map_free(umap);
  40         return NULL;
  41 }
  42
  43 __isl_give isl_union_map *isl_union_map_empty(__isl_take isl_dim *dim)
  44 {
  45         return isl_union_map_alloc(dim, 16);
  46 }
  47
  48 __isl_give isl_union_set *isl_union_set_empty(__isl_take isl_dim *dim)
  49 {
  50         return isl_union_map_empty(dim);
  51 }
  52
  53 isl_ctx *isl_union_map_get_ctx(__isl_keep isl_union_map *umap)
  54 {
  55         return umap ? umap->dim->ctx : NULL;
  56 }
  57
  58 __isl_give isl_dim *isl_union_map_get_dim(__isl_keep isl_union_map *umap)
  59 {
  60         if (!umap)
  61                 return NULL;
  62         return isl_dim_copy(umap->dim);
  63 }
  64
  65 __isl_give isl_dim *isl_union_set_get_dim(__isl_keep isl_union_set *uset)
  66 {
  67         return isl_union_map_get_dim(uset);
  68 }
  69
  70 static int free_umap_entry(void **entry, void *user)
  71 {
  72         isl_map *map = *entry;
  73         isl_map_free(map);
  74         return 0;
  75 }
  76
  77 static int add_map(__isl_take isl_map *map, void *user)
  78 {
  79         isl_union_map **umap = (isl_union_map **)user;
  80
  81         *umap = isl_union_map_add_map(*umap, map);
  82
  83         return 0;
  84 }
  85
  86 __isl_give isl_union_map *isl_union_map_dup(__isl_keep isl_union_map *umap)
  87 {
  88         isl_union_map *dup;
  89
  90         if (!umap)
  91                 return NULL;
  92
  93         dup = isl_union_map_empty(isl_dim_copy(umap->dim));
  94         if (isl_union_map_foreach_map(umap, &add_map, &dup) < 0)
  95                 goto error;
  96         return dup;
  97 error:
  98         isl_union_map_free(dup);
  99         return NULL;
 100 }
 101
 102 __isl_give isl_union_map *isl_union_map_cow(__isl_take isl_union_map *umap)
 103 {
 104         if (!umap)
 105                 return NULL;
 106
 107         if (umap->ref == 1)
 108                 return umap;
 109         umap->ref--;
 110         return isl_union_map_dup(umap);
 111 }
 112
 113 __isl_give isl_union_map *isl_union_map_union(__isl_take isl_union_map *umap1,
 114         __isl_take isl_union_map *umap2)
 115 {
 116         umap1 = isl_union_map_cow(umap1);
 117
 118         if (!umap1 || !umap2)
 119                 goto error;
 120
 121         if (isl_union_map_foreach_map(umap2, &add_map, &umap1) < 0)
 122                 goto error;
 123
 124         isl_union_map_free(umap2);
 125
 126         return umap1;
 127 error:
 128         isl_union_map_free(umap1);
 129         isl_union_map_free(umap2);
 130         return NULL;
 131 }
 132
 133 __isl_give isl_union_set *isl_union_set_union(__isl_take isl_union_set *uset1,
 134         __isl_take isl_union_set *uset2)
 135 {
 136         return isl_union_map_union(uset1, uset2);
 137 }
 138
 139 __isl_give isl_union_map *isl_union_map_copy(__isl_keep isl_union_map *umap)
 140 {
 141         if (!umap)
 142                 return NULL;
 143
 144         umap->ref++;
 145         return umap;
 146 }
 147
 148 __isl_give isl_union_set *isl_union_set_copy(__isl_keep isl_union_set *uset)
 149 {
 150         return isl_union_map_copy(uset);
 151 }
 152
 153 void isl_union_map_free(__isl_take isl_union_map *umap)
 154 {
 155         if (!umap)
 156                 return;
 157
 158         if (--umap->ref > 0)
 159                 return;
 160
 161         isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 162                                &free_umap_entry, NULL);
 163         isl_hash_table_clear(&umap->table);
 164         isl_dim_free(umap->dim);
 165         free(umap);
 166 }
 167
 168 void isl_union_set_free(__isl_take isl_union_set *uset)
 169 {
 170         isl_union_map_free(uset);
 171 }
 172
 173 static int has_dim(const void *entry, const void *val)
 174 {
 175         isl_map *map = (isl_map *)entry;
 176         isl_dim *dim = (isl_dim *)val;
 177
 178         return isl_dim_equal(map->dim, dim);
 179 }
 180
 181 __isl_give isl_union_map *isl_union_map_add_map(__isl_take isl_union_map *umap,
 182         __isl_take isl_map *map)
 183 {
 184         uint32_t hash;
 185         struct isl_hash_table_entry *entry;
 186
 187         if (isl_map_fast_is_empty(map)) {
 188                 isl_map_free(map);
 189                 return umap;
 190         }
 191
 192         umap = isl_union_map_cow(umap);
 193
 194         if (!map || !umap)
 195                 goto error;
 196
 197         isl_assert(map->ctx, isl_dim_match(map->dim, isl_dim_param, umap->dim,
 198                                            isl_dim_param), goto error);
 199
 200         hash = isl_dim_get_hash(map->dim);
 201         entry = isl_hash_table_find(umap->dim->ctx, &umap->table, hash,
 202                                     &has_dim, map->dim, 1);
 203         if (!entry)
 204                 goto error;
 205
 206         if (!entry->data)
 207                 entry->data = map;
 208         else {
 209                 entry->data = isl_map_union(entry->data, isl_map_copy(map));
 210                 if (!entry->data)
 211                         goto error;
 212                 isl_map_free(map);
 213         }
 214
 215         return umap;
 216 error:
 217         isl_map_free(map);
 218         isl_union_map_free(umap);
 219         return NULL;
 220 }
 221
 222 __isl_give isl_union_set *isl_union_set_add_set(__isl_take isl_union_set *uset,
 223         __isl_take isl_set *set)
 224 {
 225         return isl_union_map_add_map(uset, (isl_map *)set);
 226 }
 227
 228 __isl_give isl_union_map *isl_union_map_from_map(__isl_take isl_map *map)
 229 {
 230         isl_dim *dim;
 231         isl_union_map *umap;
 232
 233         if (!map)
 234                 return NULL;
 235
 236         dim = isl_map_get_dim(map);
 237         dim = isl_dim_drop(dim, isl_dim_in, 0, isl_dim_size(dim, isl_dim_in));
 238         dim = isl_dim_drop(dim, isl_dim_out, 0, isl_dim_size(dim, isl_dim_out));
 239         umap = isl_union_map_empty(dim);
 240         umap = isl_union_map_add_map(umap, map);
 241
 242         return umap;
 243 }
 244
 245 __isl_give isl_union_set *isl_union_set_from_set(__isl_take isl_set *set)
 246 {
 247         return isl_union_map_from_map((isl_map *)set);
 248 }
 249
 250 struct isl_union_map_foreach_data
 251 {
 252         int (*fn)(__isl_take isl_map *map, void *user);
 253         void *user;
 254 };
 255
 256 static int call_on_copy(void **entry, void *user)
 257 {
 258         isl_map *map = *entry;
 259         struct isl_union_map_foreach_data *data;
 260         data = (struct isl_union_map_foreach_data *)user;
 261
 262         return data->fn(isl_map_copy(map), data->user);
 263 }
 264
 265 int isl_union_map_foreach_map(__isl_keep isl_union_map *umap,
 266         int (*fn)(__isl_take isl_map *map, void *user), void *user)
 267 {
 268         struct isl_union_map_foreach_data data = { fn, user };
 269
 270         if (!umap)
 271                 return -1;
 272
 273         return isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 274                                       &call_on_copy, &data);
 275 }
 276
 277 int isl_union_set_foreach_set(__isl_keep isl_union_set *uset,
 278         int (*fn)(__isl_take isl_set *set, void *user), void *user)
 279 {
 280         return isl_union_map_foreach_map(uset,
 281                 (int(*)(__isl_take isl_map *, void*))fn, user);
 282 }
 283
 284 struct isl_union_set_foreach_point_data {
 285         int (*fn)(__isl_take isl_point *pnt, void *user);
 286         void *user;
 287 };
 288
 289 static int foreach_point(__isl_take isl_set *set, void *user)
 290 {
 291         struct isl_union_set_foreach_point_data *data = user;
 292         int r;
 293
 294         r = isl_set_foreach_point(set, data->fn, data->user);
 295         isl_set_free(set);
 296
 297         return r;
 298 }
 299
 300 int isl_union_set_foreach_point(__isl_keep isl_union_set *uset,
 301         int (*fn)(__isl_take isl_point *pnt, void *user), void *user)
 302 {
 303         struct isl_union_set_foreach_point_data data = { fn, user };
 304         return isl_union_set_foreach_set(uset, &foreach_point, &data);
 305 }
 306
 307 struct isl_union_map_gen_bin_data {
 308         isl_union_map *umap2;
 309         isl_union_map *res;
 310 };
 311
 312 static int subtract_entry(void **entry, void *user)
 313 {
 314         struct isl_union_map_gen_bin_data *data = user;
 315         uint32_t hash;
 316         struct isl_hash_table_entry *entry2;
 317         isl_map *map = *entry;
 318
 319         hash = isl_dim_get_hash(map->dim);
 320         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 321                                      hash, &has_dim, map->dim, 0);
 322         map = isl_map_copy(map);
 323         if (entry2) {
 324                 int empty;
 325                 map = isl_map_subtract(map, isl_map_copy(entry2->data));
 326
 327                 empty = isl_map_is_empty(map);
 328                 if (empty < 0) {
 329                         isl_map_free(map);
 330                         return -1;
 331                 }
 332                 if (empty) {
 333                         isl_map_free(map);
 334                         return 0;
 335                 }
 336         }
 337         data->res = isl_union_map_add_map(data->res, map);
 338
 339         return 0;
 340 }
 341
 342 static __isl_give isl_union_map *gen_bin_op(__isl_take isl_union_map *umap1,
 343         __isl_take isl_union_map *umap2, int (*fn)(void **, void *))
 344 {
 345         struct isl_union_map_gen_bin_data data = { umap2, NULL };
 346
 347         if (!umap1 || !umap2)
 348                 goto error;
 349
 350         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 351                                        umap1->table.n);
 352         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 353                                    fn, &data) < 0)
 354                 goto error;
 355
 356         isl_union_map_free(umap1);
 357         isl_union_map_free(umap2);
 358         return data.res;
 359 error:
 360         isl_union_map_free(umap1);
 361         isl_union_map_free(umap2);
 362         isl_union_map_free(data.res);
 363         return NULL;
 364 }
 365
 366 __isl_give isl_union_map *isl_union_map_subtract(
 367         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 368 {
 369         return gen_bin_op(umap1, umap2, &subtract_entry);
 370 }
 371
 372 __isl_give isl_union_set *isl_union_set_subtract(
 373         __isl_take isl_union_set *uset1, __isl_take isl_union_set *uset2)
 374 {
 375         return isl_union_map_subtract(uset1, uset2);
 376 }
 377
 378 struct isl_union_map_match_bin_data {
 379         isl_union_map *umap2;
 380         isl_union_map *res;
 381         __isl_give isl_map *(*fn)(__isl_take isl_map*, __isl_take isl_map*);
 382 };
 383
 384 static int match_bin_entry(void **entry, void *user)
 385 {
 386         struct isl_union_map_match_bin_data *data = user;
 387         uint32_t hash;
 388         struct isl_hash_table_entry *entry2;
 389         isl_map *map = *entry;
 390         int empty;
 391
 392         hash = isl_dim_get_hash(map->dim);
 393         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 394                                      hash, &has_dim, map->dim, 0);
 395         if (!entry2)
 396                 return 0;
 397
 398         map = isl_map_copy(map);
 399         map = data->fn(map, isl_map_copy(entry2->data));
 400
 401         empty = isl_map_is_empty(map);
 402         if (empty < 0) {
 403                 isl_map_free(map);
 404                 return -1;
 405         }
 406         if (empty) {
 407                 isl_map_free(map);
 408                 return 0;
 409         }
 410
 411         data->res = isl_union_map_add_map(data->res, map);
 412
 413         return 0;
 414 }
 415
 416 static __isl_give isl_union_map *match_bin_op(__isl_take isl_union_map *umap1,
 417         __isl_take isl_union_map *umap2,
 418         __isl_give isl_map *(*fn)(__isl_take isl_map*, __isl_take isl_map*))
 419 {
 420         struct isl_union_map_match_bin_data data = { umap2, NULL, fn };
 421
 422         if (!umap1 || !umap2)
 423                 goto error;
 424
 425         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 426                                        umap1->table.n);
 427         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 428                                    &match_bin_entry, &data) < 0)
 429                 goto error;
 430
 431         isl_union_map_free(umap1);
 432         isl_union_map_free(umap2);
 433         return data.res;
 434 error:
 435         isl_union_map_free(umap1);
 436         isl_union_map_free(umap2);
 437         isl_union_map_free(data.res);
 438         return NULL;
 439 }
 440
 441 __isl_give isl_union_map *isl_union_map_intersect(
 442         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 443 {
 444         return match_bin_op(umap1, umap2, &isl_map_intersect);
 445 }
 446
 447 __isl_give isl_union_set *isl_union_set_intersect(
 448         __isl_take isl_union_set *uset1, __isl_take isl_union_set *uset2)
 449 {
 450         return isl_union_map_intersect(uset1, uset2);
 451 }
 452
 453 __isl_give isl_union_map *isl_union_map_gist(__isl_take isl_union_map *umap,
 454         __isl_take isl_union_map *context)
 455 {
 456         return match_bin_op(umap, context, &isl_map_gist);
 457 }
 458
 459 __isl_give isl_union_set *isl_union_set_gist(__isl_take isl_union_set *uset,
 460         __isl_take isl_union_set *context)
 461 {
 462         return isl_union_map_gist(uset, context);
 463 }
 464
 465 static int intersect_domain_entry(void **entry, void *user)
 466 {
 467         struct isl_union_map_gen_bin_data *data = user;
 468         uint32_t hash;
 469         struct isl_hash_table_entry *entry2;
 470         isl_dim *dim;
 471         isl_map *map = *entry;
 472         int empty;
 473
 474         dim = isl_map_get_dim(map);
 475         dim = isl_dim_domain(dim);
 476         hash = isl_dim_get_hash(dim);
 477         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 478                                      hash, &has_dim, dim, 0);
 479         isl_dim_free(dim);
 480         if (!entry2)
 481                 return 0;
 482
 483         map = isl_map_copy(map);
 484         map = isl_map_intersect_domain(map, isl_set_copy(entry2->data));
 485
 486         empty = isl_map_is_empty(map);
 487         if (empty < 0) {
 488                 isl_map_free(map);
 489                 return -1;
 490         }
 491         if (empty) {
 492                 isl_map_free(map);
 493                 return 0;
 494         }
 495
 496         data->res = isl_union_map_add_map(data->res, map);
 497
 498         return 0;
 499 }
 500
 501 __isl_give isl_union_map *isl_union_map_intersect_domain(
 502         __isl_take isl_union_map *umap, __isl_take isl_union_set *uset)
 503 {
 504         return gen_bin_op(umap, uset, &intersect_domain_entry);
 505 }
 506
 507 struct isl_union_map_bin_data {
 508         isl_union_map *umap2;
 509         isl_union_map *res;
 510         isl_map *map;
 511         int (*fn)(void **entry, void *user);
 512 };
 513
 514 static int apply_range_entry(void **entry, void *user)
 515 {
 516         struct isl_union_map_bin_data *data = user;
 517         isl_map *map2 = *entry;
 518         int empty;
 519
 520         if (!isl_dim_tuple_match(data->map->dim, isl_dim_out,
 521                                  map2->dim, isl_dim_in))
 522                 return 0;
 523
 524         map2 = isl_map_apply_range(isl_map_copy(data->map), isl_map_copy(map2));
 525
 526         empty = isl_map_is_empty(map2);
 527         if (empty < 0) {
 528                 isl_map_free(map2);
 529                 return -1;
 530         }
 531         if (empty) {
 532                 isl_map_free(map2);
 533                 return 0;
 534         }
 535
 536         data->res = isl_union_map_add_map(data->res, map2);
 537
 538         return 0;
 539 }
 540
 541 static int bin_entry(void **entry, void *user)
 542 {
 543         struct isl_union_map_bin_data *data = user;
 544         isl_map *map = *entry;
 545
 546         data->map = map;
 547         if (isl_hash_table_foreach(data->umap2->dim->ctx, &data->umap2->table,
 548                                    data->fn, data) < 0)
 549                 return -1;
 550
 551         return 0;
 552 }
 553
 554 static __isl_give isl_union_map *bin_op(__isl_take isl_union_map *umap1,
 555         __isl_take isl_union_map *umap2, int (*fn)(void **entry, void *user))
 556 {
 557         struct isl_union_map_bin_data data = { umap2, NULL, NULL, fn };
 558
 559         if (!umap1 || !umap2)
 560                 goto error;
 561
 562         data.res = isl_union_map_alloc(isl_dim_copy(umap1->dim),
 563                                        umap1->table.n);
 564         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 565                                    &bin_entry, &data) < 0)
 566                 goto error;
 567
 568         isl_union_map_free(umap1);
 569         isl_union_map_free(umap2);
 570         return data.res;
 571 error:
 572         isl_union_map_free(umap1);
 573         isl_union_map_free(umap2);
 574         isl_union_map_free(data.res);
 575         return NULL;
 576 }
 577
 578 __isl_give isl_union_map *isl_union_map_apply_range(
 579         __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
 580 {
 581         return bin_op(umap1, umap2, &apply_range_entry);
 582 }
 583
 584 __isl_give isl_union_set *isl_union_set_apply(
 585         __isl_take isl_union_set *uset, __isl_take isl_union_map *umap)
 586 {
 587         return isl_union_map_apply_range(uset, umap);
 588 }
 589
 590 static int product_entry(void **entry, void *user)
 591 {
 592         struct isl_union_map_bin_data *data = user;
 593         isl_map *map2 = *entry;
 594
 595         map2 = isl_map_product(isl_map_copy(data->map), isl_map_copy(map2));
 596
 597         data->res = isl_union_map_add_map(data->res, map2);
 598
 599         return 0;
 600 }
 601
 602 __isl_give isl_union_map *isl_union_map_product(__isl_take isl_union_map *umap1,
 603         __isl_take isl_union_map *umap2)
 604 {
 605         return bin_op(umap1, umap2, &product_entry);
 606 }
 607
 608 __isl_give isl_union_set *isl_union_set_product(__isl_take isl_union_set *uset1,
 609         __isl_take isl_union_set *uset2)
 610 {
 611         return isl_union_map_product(uset1, uset2);
 612 }
 613
 614 __isl_give isl_union_map *isl_union_map_from_range(
 615         __isl_take isl_union_set *uset)
 616 {
 617         return uset;
 618 }
 619
 620 __isl_give isl_union_map *isl_union_map_from_domain(
 621         __isl_take isl_union_set *uset)
 622 {
 623         return isl_union_map_reverse(isl_union_map_from_range(uset));
 624 }
 625
 626 __isl_give isl_union_map *isl_union_map_from_domain_and_range(
 627         __isl_take isl_union_set *domain, __isl_take isl_union_set *range)
 628 {
 629         return isl_union_map_apply_range(isl_union_map_from_domain(domain),
 630                                          isl_union_map_from_range(range));
 631 }
 632
 633 static int reverse_entry(void **entry, void *user)
 634 {
 635         isl_map **map = (isl_map **)entry;
 636
 637         *map = isl_map_reverse(*map);
 638
 639         return *map ? 0 : -1;
 640 }
 641
 642 static __isl_give isl_union_map *un_op(__isl_take isl_union_map *umap,
 643         int (*fn)(void **, void *), int cow)
 644 {
 645         if (cow)
 646                 umap = isl_union_map_cow(umap);
 647         if (!umap)
 648                 return NULL;
 649
 650         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table, fn, NULL) < 0)
 651                 goto error;
 652
 653         return umap;
 654 error:
 655         isl_union_map_free(umap);
 656         return NULL;
 657 }
 658
 659 __isl_give isl_union_map *isl_union_map_reverse(__isl_take isl_union_map *umap)
 660 {
 661         return un_op(umap, &reverse_entry, 1);
 662 }
 663
 664 static int affine_entry(void **entry, void *user)
 665 {
 666         isl_map **map = (isl_map **)entry;
 667
 668         *map = isl_map_from_basic_map(isl_map_affine_hull(*map));
 669
 670         return *map ? 0 : -1;
 671 }
 672
 673 __isl_give isl_union_map *isl_union_map_affine_hull(
 674         __isl_take isl_union_map *umap)
 675 {
 676         return un_op(umap, &affine_entry, 1);
 677 }
 678
 679 __isl_give isl_union_set *isl_union_set_affine_hull(
 680         __isl_take isl_union_set *uset)
 681 {
 682         return isl_union_map_affine_hull(uset);
 683 }
 684
 685 static int coalesce_entry(void **entry, void *user)
 686 {
 687         isl_map **map = (isl_map **)entry;
 688
 689         *map = isl_map_coalesce(*map);
 690
 691         return *map ? 0 : -1;
 692 }
 693
 694 __isl_give isl_union_map *isl_union_map_coalesce(
 695         __isl_take isl_union_map *umap)
 696 {
 697         return un_op(umap, &coalesce_entry, 0);
 698 }
 699
 700 __isl_give isl_union_set *isl_union_set_coalesce(
 701         __isl_take isl_union_set *uset)
 702 {
 703         return isl_union_map_coalesce(uset);
 704 }
 705
 706 static int compute_divs_entry(void **entry, void *user)
 707 {
 708         isl_map **map = (isl_map **)entry;
 709
 710         *map = isl_map_compute_divs(*map);
 711
 712         return *map ? 0 : -1;
 713 }
 714
 715 __isl_give isl_union_map *isl_union_map_compute_divs(
 716         __isl_take isl_union_map *umap)
 717 {
 718         return un_op(umap, &compute_divs_entry, 0);
 719 }
 720
 721 __isl_give isl_union_set *isl_union_set_compute_divs(
 722         __isl_take isl_union_set *uset)
 723 {
 724         return isl_union_map_compute_divs(uset);
 725 }
 726
 727 static int lexmin_entry(void **entry, void *user)
 728 {
 729         isl_map **map = (isl_map **)entry;
 730
 731         *map = isl_map_lexmin(*map);
 732
 733         return *map ? 0 : -1;
 734 }
 735
 736 __isl_give isl_union_map *isl_union_map_lexmin(
 737         __isl_take isl_union_map *umap)
 738 {
 739         return un_op(umap, &lexmin_entry, 1);
 740 }
 741
 742 __isl_give isl_union_set *isl_union_set_lexmin(
 743         __isl_take isl_union_set *uset)
 744 {
 745         return isl_union_map_lexmin(uset);
 746 }
 747
 748 static int lexmax_entry(void **entry, void *user)
 749 {
 750         isl_map **map = (isl_map **)entry;
 751
 752         *map = isl_map_lexmax(*map);
 753
 754         return *map ? 0 : -1;
 755 }
 756
 757 __isl_give isl_union_map *isl_union_map_lexmax(
 758         __isl_take isl_union_map *umap)
 759 {
 760         return un_op(umap, &lexmax_entry, 1);
 761 }
 762
 763 __isl_give isl_union_set *isl_union_set_lexmax(
 764         __isl_take isl_union_set *uset)
 765 {
 766         return isl_union_map_lexmax(uset);
 767 }
 768
 769 static int domain_entry(void **entry, void *user)
 770 {
 771         *entry = isl_map_domain(*entry);
 772
 773         return *entry ? 0 : -1;
 774 }
 775
 776 __isl_give isl_union_set *isl_union_map_domain(__isl_take isl_union_map *umap)
 777 {
 778         return un_op(umap, &domain_entry, 1);
 779 }
 780
 781 static int range_entry(void **entry, void *user)
 782 {
 783         *entry = isl_map_range(*entry);
 784
 785         return *entry ? 0 : -1;
 786 }
 787
 788 __isl_give isl_union_set *isl_union_map_range(__isl_take isl_union_map *umap)
 789 {
 790         return un_op(umap, &range_entry, 1);
 791 }
 792
 793 static  int deltas_entry(void **entry, void *user)
 794 {
 795         isl_map *map = *entry;
 796         isl_union_set **res = user;
 797
 798         if (!isl_dim_tuple_match(map->dim, isl_dim_in, map->dim, isl_dim_out))
 799                 return 0;
 800
 801         *res = isl_union_set_add_set(*res, isl_map_deltas(isl_map_copy(map)));
 802
 803         return 0;
 804 }
 805
 806 __isl_give isl_union_set *isl_union_map_deltas(__isl_take isl_union_map *umap)
 807 {
 808         isl_union_set *res;
 809
 810         if (!umap)
 811                 return NULL;
 812
 813         res = isl_union_map_alloc(isl_dim_copy(umap->dim), umap->table.n);
 814         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 815                                    &deltas_entry, &res) < 0)
 816                 goto error;
 817
 818         isl_union_map_free(umap);
 819         return res;
 820 error:
 821         isl_union_map_free(umap);
 822         isl_union_set_free(res);
 823         return NULL;
 824 }
 825
 826 struct isl_union_map_is_subset_data {
 827         isl_union_map *umap2;
 828         int is_subset;
 829 };
 830
 831 static int is_subset_entry(void **entry, void *user)
 832 {
 833         struct isl_union_map_is_subset_data *data = user;
 834         uint32_t hash;
 835         struct isl_hash_table_entry *entry2;
 836         isl_map *map = *entry;
 837
 838         hash = isl_dim_get_hash(map->dim);
 839         entry2 = isl_hash_table_find(data->umap2->dim->ctx, &data->umap2->table,
 840                                      hash, &has_dim, map->dim, 0);
 841         if (!entry2) {
 842                 data->is_subset = 0;
 843                 return -1;
 844         }
 845
 846         data->is_subset = isl_map_is_subset(map, entry2->data);
 847         if (data->is_subset < 0 || !data->is_subset)
 848                 return -1;
 849
 850         return 0;
 851 }
 852
 853 int isl_union_map_is_subset(__isl_keep isl_union_map *umap1,
 854         __isl_keep isl_union_map *umap2)
 855 {
 856         struct isl_union_map_is_subset_data data = { umap2, 1 };
 857
 858         if (!umap1 || !umap2)
 859                 return -1;
 860
 861         if (isl_hash_table_foreach(umap1->dim->ctx, &umap1->table,
 862                                    &is_subset_entry, &data) < 0 &&
 863             data.is_subset)
 864                 return -1;
 865
 866         return data.is_subset;
 867 }
 868
 869 int isl_union_map_is_equal(__isl_keep isl_union_map *umap1,
 870         __isl_keep isl_union_map *umap2)
 871 {
 872         int is_subset;
 873
 874         if (!umap1 || !umap2)
 875                 return -1;
 876         is_subset = isl_union_map_is_subset(umap1, umap2);
 877         if (is_subset != 1)
 878                 return is_subset;
 879         is_subset = isl_union_map_is_subset(umap2, umap1);
 880         return is_subset;
 881 }
 882
 883 int isl_union_map_is_strict_subset(__isl_keep isl_union_map *umap1,
 884         __isl_keep isl_union_map *umap2)
 885 {
 886         int is_subset;
 887
 888         if (!umap1 || !umap2)
 889                 return -1;
 890         is_subset = isl_union_map_is_subset(umap1, umap2);
 891         if (is_subset != 1)
 892                 return is_subset;
 893         is_subset = isl_union_map_is_subset(umap2, umap1);
 894         if (is_subset == -1)
 895                 return is_subset;
 896         return !is_subset;
 897 }
 898
 899 static int sample_entry(void **entry, void *user)
 900 {
 901         isl_basic_map **sample = (isl_basic_map **)user;
 902         isl_map *map = *entry;
 903
 904         *sample = isl_map_sample(isl_map_copy(map));
 905         if (!*sample)
 906                 return -1;
 907         if (!isl_basic_map_fast_is_empty(*sample))
 908                 return -1;
 909         return 0;
 910 }
 911
 912 __isl_give isl_basic_map *isl_union_map_sample(__isl_take isl_union_map *umap)
 913 {
 914         isl_basic_map *sample = NULL;
 915
 916         if (!umap)
 917                 return NULL;
 918
 919         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 920                                    &sample_entry, &sample) < 0 &&
 921             !sample)
 922                 goto error;
 923
 924         isl_union_map_free(umap);
 925
 926         return sample;
 927 error:
 928         isl_union_map_free(umap);
 929         return NULL;
 930 }
 931
 932 __isl_give isl_basic_set *isl_union_set_sample(__isl_take isl_union_set *uset)
 933 {
 934         return (isl_basic_set *)isl_union_map_sample(uset);
 935 }
 936
 937 static int empty_entry(void **entry, void *user)
 938 {
 939         int *empty = user;
 940         isl_map *map = *entry;
 941
 942         if (isl_map_is_empty(map))
 943                 return 0;
 944
 945         *empty = 0;
 946
 947         return -1;
 948 }
 949
 950 __isl_give int isl_union_map_is_empty(__isl_keep isl_union_map *umap)
 951 {
 952         int empty = 1;
 953
 954         if (!umap)
 955                 return -1;
 956
 957         if (isl_hash_table_foreach(umap->dim->ctx, &umap->table,
 958                                    &sample_entry, &empty) < 0 && empty)
 959                 return -1;
 960
 961         return empty;
 962 }
 963
 964 int isl_union_set_is_empty(__isl_keep isl_union_set *uset)
 965 {
 966         return isl_union_map_is_empty(uset);
 967 }