isl_input.c

   1 /*
   2  * Copyright 2008-2009 Katholieke Universiteit Leuven
   3  * Copyright 2010      INRIA Saclay
   4  *
   5  * Use of this software is governed by the GNU LGPLv2.1 license
   6  *
   7  * Written by Sven Verdoolaege, K.U.Leuven, Departement
   8  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
   9  * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
  10  * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
  11  */
  12
  13 #include <ctype.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <strings.h>
  17 #include <isl_map_private.h>
  18 #include <isl/set.h>
  19 #include <isl/seq.h>
  20 #include <isl/div.h>
  21 #include <isl/stream.h>
  22 #include <isl/obj.h>
  23 #include "isl_polynomial_private.h"
  24 #include <isl/union_map.h>
  25 #include <isl_mat_private.h>
  26
  27 struct variable {
  28         char                    *name;
  29         int                      pos;
  30         isl_vec                 *def;
  31         struct variable         *next;
  32 };
  33
  34 struct vars {
  35         struct isl_ctx  *ctx;
  36         int              n;
  37         struct variable *v;
  38 };
  39
  40 static struct vars *vars_new(struct isl_ctx *ctx)
  41 {
  42         struct vars *v;
  43         v = isl_alloc_type(ctx, struct vars);
  44         if (!v)
  45                 return NULL;
  46         v->ctx = ctx;
  47         v->n = 0;
  48         v->v = NULL;
  49         return v;
  50 }
  51
  52 static void variable_free(struct variable *var)
  53 {
  54         while (var) {
  55                 struct variable *next = var->next;
  56                 isl_vec_free(var->def);
  57                 free(var->name);
  58                 free(var);
  59                 var = next;
  60         }
  61 }
  62
  63 static void vars_free(struct vars *v)
  64 {
  65         if (!v)
  66                 return;
  67         variable_free(v->v);
  68         free(v);
  69 }
  70
  71 static void vars_drop(struct vars *v, int n)
  72 {
  73         struct variable *var;
  74
  75         if (!v || !v->v)
  76                 return;
  77
  78         v->n -= n;
  79
  80         var = v->v;
  81         while (--n >= 0) {
  82                 struct variable *next = var->next;
  83                 isl_vec_free(var->def);
  84                 free(var->name);
  85                 free(var);
  86                 var = next;
  87         }
  88         v->v = var;
  89 }
  90
  91 static struct variable *variable_new(struct vars *v, const char *name, int len,
  92                                 int pos)
  93 {
  94         struct variable *var;
  95         var = isl_alloc_type(v->ctx, struct variable);
  96         if (!var)
  97                 goto error;
  98         var->name = strdup(name);
  99         var->name[len] = '\0';
 100         var->pos = pos;
 101         var->def = NULL;
 102         var->next = v->v;
 103         return var;
 104 error:
 105         variable_free(v->v);
 106         return NULL;
 107 }
 108
 109 static int vars_pos(struct vars *v, const char *s, int len)
 110 {
 111         int pos;
 112         struct variable *q;
 113
 114         if (len == -1)
 115                 len = strlen(s);
 116         for (q = v->v; q; q = q->next) {
 117                 if (strncmp(q->name, s, len) == 0 && q->name[len] == '\0')
 118                         break;
 119         }
 120         if (q)
 121                 pos = q->pos;
 122         else {
 123                 pos = v->n;
 124                 v->v = variable_new(v, s, len, v->n);
 125                 if (!v->v)
 126                         return -1;
 127                 v->n++;
 128         }
 129         return pos;
 130 }
 131
 132 static int vars_add_anon(struct vars *v)
 133 {
 134         v->v = variable_new(v, "", 0, v->n);
 135
 136         if (!v->v)
 137                 return -1;
 138         v->n++;
 139
 140         return 0;
 141 }
 142
 143 static __isl_give isl_basic_map *set_name(__isl_take isl_basic_map *bmap,
 144         enum isl_dim_type type, unsigned pos, char *name)
 145 {
 146         char *prime;
 147
 148         if (!bmap)
 149                 return NULL;
 150         if (!name)
 151                 return bmap;
 152
 153         prime = strchr(name, '\'');
 154         if (prime)
 155                 *prime = '\0';
 156         bmap = isl_basic_map_set_dim_name(bmap, type, pos, name);
 157         if (prime)
 158                 *prime = '\'';
 159
 160         return bmap;
 161 }
 162
 163 static int accept_cst_factor(struct isl_stream *s, isl_int *f)
 164 {
 165         struct isl_token *tok;
 166
 167         tok = isl_stream_next_token(s);
 168         if (!tok || tok->type != ISL_TOKEN_VALUE) {
 169                 isl_stream_error(s, tok, "expecting constant value");
 170                 goto error;
 171         }
 172
 173         isl_int_mul(*f, *f, tok->u.v);
 174
 175         isl_token_free(tok);
 176
 177         if (isl_stream_eat_if_available(s, '*'))
 178                 return accept_cst_factor(s, f);
 179
 180         return 0;
 181 error:
 182         isl_token_free(tok);
 183         return -1;
 184 }
 185
 186 /* Given an affine expression aff, return an affine expression
 187  * for aff % d, with d the next token on the stream, which is
 188  * assumed to be a constant.
 189  *
 190  * We introduce an integer division q = [aff/d] and the result
 191  * is set to aff - d q.
 192  */
 193 static __isl_give isl_vec *affine_mod(struct isl_stream *s,
 194         struct vars *v, __isl_take isl_vec *aff)
 195 {
 196         struct isl_token *tok;
 197         struct variable *var;
 198         isl_vec *mod;
 199
 200         tok = isl_stream_next_token(s);
 201         if (!tok || tok->type != ISL_TOKEN_VALUE) {
 202                 isl_stream_error(s, tok, "expecting constant value");
 203                 goto error;
 204         }
 205
 206         if (vars_add_anon(v) < 0)
 207                 goto error;
 208
 209         var = v->v;
 210
 211         var->def = isl_vec_alloc(s->ctx, 2 + v->n);
 212         if (!var->def)
 213                 goto error;
 214         isl_seq_cpy(var->def->el + 1, aff->el, aff->size);
 215         isl_int_set_si(var->def->el[1 + aff->size], 0);
 216         isl_int_set(var->def->el[0], tok->u.v);
 217
 218         mod = isl_vec_alloc(v->ctx, 1 + v->n);
 219         if (!mod)
 220                 goto error;
 221
 222         isl_seq_cpy(mod->el, aff->el, aff->size);
 223         isl_int_neg(mod->el[aff->size], tok->u.v);
 224
 225         isl_vec_free(aff);
 226         isl_token_free(tok);
 227         return mod;
 228 error:
 229         isl_vec_free(aff);
 230         isl_token_free(tok);
 231         return NULL;
 232 }
 233
 234 static struct isl_vec *accept_affine(struct isl_stream *s, struct vars *v);
 235 static int read_div_definition(struct isl_stream *s, struct vars *v);
 236
 237 static __isl_give isl_vec *accept_affine_factor(struct isl_stream *s,
 238         struct vars *v)
 239 {
 240         struct isl_token *tok = NULL;
 241         isl_vec *aff = NULL;
 242
 243         tok = isl_stream_next_token(s);
 244         if (!tok) {
 245                 isl_stream_error(s, NULL, "unexpected EOF");
 246                 goto error;
 247         }
 248         if (tok->type == ISL_TOKEN_IDENT) {
 249                 int n = v->n;
 250                 int pos = vars_pos(v, tok->u.s, -1);
 251                 if (pos < 0)
 252                         goto error;
 253                 if (pos >= n) {
 254                         isl_stream_error(s, tok, "unknown identifier");
 255                         goto error;
 256                 }
 257
 258                 aff = isl_vec_alloc(v->ctx, 1 + v->n);
 259                 if (!aff)
 260                         goto error;
 261                 isl_seq_clr(aff->el, aff->size);
 262                 isl_int_set_si(aff->el[1 + pos], 1);
 263                 isl_token_free(tok);
 264         } else if (tok->type == ISL_TOKEN_VALUE) {
 265                 if (isl_stream_eat_if_available(s, '*')) {
 266                         aff = accept_affine_factor(s, v);
 267                         aff = isl_vec_scale(aff, tok->u.v);
 268                 } else {
 269                         aff = isl_vec_alloc(v->ctx, 1 + v->n);
 270                         if (!aff)
 271                                 goto error;
 272                         isl_seq_clr(aff->el, aff->size);
 273                         isl_int_set(aff->el[0], tok->u.v);
 274                 }
 275                 isl_token_free(tok);
 276         } else if (tok->type == '(') {
 277                 isl_token_free(tok);
 278                 tok = NULL;
 279                 aff = accept_affine(s, v);
 280                 if (!aff)
 281                         goto error;
 282                 if (isl_stream_eat(s, ')'))
 283                         goto error;
 284         } else if (tok->type == '[') {
 285                 if (vars_add_anon(v) < 0)
 286                         goto error;
 287                 aff = isl_vec_alloc(v->ctx, 1 + v->n);
 288                 if (!aff)
 289                         goto error;
 290                 isl_seq_clr(aff->el, aff->size);
 291                 isl_int_set_si(aff->el[1 + v->n - 1], 1);
 292                 isl_stream_push_token(s, tok);
 293                 tok = NULL;
 294                 if (read_div_definition(s, v) < 0)
 295                         goto error;
 296         } else {
 297                 isl_stream_error(s, tok, "expecting factor");
 298                 goto error;
 299         }
 300         if (isl_stream_eat_if_available(s, '%'))
 301                 return affine_mod(s, v, aff);
 302         if (isl_stream_eat_if_available(s, '*')) {
 303                 isl_int f;
 304                 isl_int_init(f);
 305                 isl_int_set_si(f, 1);
 306                 if (accept_cst_factor(s, &f) < 0) {
 307                         isl_int_clear(f);
 308                         goto error2;
 309                 }
 310                 aff = isl_vec_scale(aff, f);
 311                 isl_int_clear(f);
 312         }
 313
 314         return aff;
 315 error:
 316         isl_token_free(tok);
 317 error2:
 318         isl_vec_free(aff);
 319         return NULL;
 320 }
 321
 322 static struct isl_vec *accept_affine(struct isl_stream *s, struct vars *v)
 323 {
 324         struct isl_token *tok = NULL;
 325         struct isl_vec *aff;
 326         int sign = 1;
 327
 328         aff = isl_vec_alloc(v->ctx, 1 + v->n);
 329         if (!aff)
 330                 return NULL;
 331         isl_seq_clr(aff->el, aff->size);
 332
 333         for (;;) {
 334                 tok = isl_stream_next_token(s);
 335                 if (!tok) {
 336                         isl_stream_error(s, NULL, "unexpected EOF");
 337                         goto error;
 338                 }
 339                 if (tok->type == '-') {
 340                         sign = -sign;
 341                         isl_token_free(tok);
 342                         continue;
 343                 }
 344                 if (tok->type == '(' || tok->type == '[' ||
 345                     tok->type == ISL_TOKEN_IDENT) {
 346                         isl_vec *aff2;
 347                         isl_stream_push_token(s, tok);
 348                         tok = NULL;
 349                         aff2 = accept_affine_factor(s, v);
 350                         if (sign < 0)
 351                                 aff2 = isl_vec_scale(aff2, s->ctx->negone);
 352                         aff = isl_vec_zero_extend(aff, 1 + v->n);
 353                         aff = isl_vec_add(aff, aff2);
 354                         if (!aff)
 355                                 goto error;
 356                         sign = 1;
 357                 } else if (tok->type == ISL_TOKEN_VALUE) {
 358                         if (sign < 0)
 359                                 isl_int_neg(tok->u.v, tok->u.v);
 360                         if (isl_stream_eat_if_available(s, '*') ||
 361                             isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
 362                                 isl_vec *aff2;
 363                                 aff2 = accept_affine_factor(s, v);
 364                                 aff2 = isl_vec_scale(aff2, tok->u.v);
 365                                 aff = isl_vec_zero_extend(aff, 1 + v->n);
 366                                 aff = isl_vec_add(aff, aff2);
 367                                 if (!aff)
 368                                         goto error;
 369                         } else {
 370                                 isl_int_add(aff->el[0], aff->el[0], tok->u.v);
 371                         }
 372                         sign = 1;
 373                 } else {
 374                         isl_stream_error(s, tok, "unexpected isl_token");
 375                         isl_stream_push_token(s, tok);
 376                         isl_vec_free(aff);
 377                         return NULL;
 378                 }
 379                 isl_token_free(tok);
 380
 381                 tok = isl_stream_next_token(s);
 382                 if (tok && tok->type == '-') {
 383                         sign = -sign;
 384                         isl_token_free(tok);
 385                 } else if (tok && tok->type == '+') {
 386                         /* nothing */
 387                         isl_token_free(tok);
 388                 } else if (tok && tok->type == ISL_TOKEN_VALUE &&
 389                            isl_int_is_neg(tok->u.v)) {
 390                         isl_stream_push_token(s, tok);
 391                 } else {
 392                         if (tok)
 393                                 isl_stream_push_token(s, tok);
 394                         break;
 395                 }
 396         }
 397
 398         return aff;
 399 error:
 400         isl_token_free(tok);
 401         isl_vec_free(aff);
 402         return NULL;
 403 }
 404
 405 /* Add any variables in the variable list "v" that are not already in "bmap"
 406  * as existentially quantified variables in "bmap".
 407  */
 408 static __isl_give isl_basic_map *add_divs(__isl_take isl_basic_map *bmap,
 409         struct vars *v)
 410 {
 411         int i;
 412         int extra;
 413         struct variable *var;
 414
 415         extra = v->n - isl_basic_map_total_dim(bmap);
 416
 417         if (extra == 0)
 418                 return bmap;
 419
 420         bmap = isl_basic_map_extend_dim(bmap, isl_basic_map_get_dim(bmap),
 421                                         extra, 0, 2 * extra);
 422
 423         for (i = 0; i < extra; ++i)
 424                 if (isl_basic_map_alloc_div(bmap) < 0)
 425                         goto error;
 426
 427         for (i = 0, var = v->v; i < extra; ++i, var = var->next) {
 428                 int k = bmap->n_div - 1 - i;
 429
 430                 isl_seq_cpy(bmap->div[k], var->def->el, var->def->size);
 431                 isl_seq_clr(bmap->div[k] + var->def->size,
 432                             2 + v->n - var->def->size);
 433
 434                 if (isl_basic_map_add_div_constraints(bmap, k) < 0)
 435                         goto error;
 436         }
 437
 438         return bmap;
 439 error:
 440         isl_basic_map_free(bmap);
 441         return NULL;
 442 }
 443
 444 static __isl_give isl_basic_map *read_var_def(struct isl_stream *s,
 445         __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v)
 446 {
 447         isl_dim *dim;
 448         isl_basic_map *def = NULL;
 449         struct isl_vec *vec;
 450         int k;
 451         int n;
 452
 453         if (vars_add_anon(v) < 0)
 454                 goto error;
 455         n = v->n;
 456
 457         vec = accept_affine(s, v);
 458         if (!vec)
 459                 goto error;
 460
 461         dim = isl_basic_map_get_dim(bmap);
 462         def = isl_basic_map_universe(dim);
 463         def = add_divs(def, v);
 464         def = isl_basic_map_extend_constraints(def, 1, 0);
 465         k = isl_basic_map_alloc_equality(def);
 466         if (k >= 0) {
 467                 isl_seq_cpy(def->eq[k], vec->el, vec->size);
 468                 isl_int_set_si(def->eq[k][1 + n - 1], -1);
 469         }
 470         isl_vec_free(vec);
 471         if (k < 0)
 472                 goto error;
 473
 474         vars_drop(v, v->n - n);
 475
 476         def = isl_basic_map_simplify(def);
 477         def = isl_basic_map_finalize(def);
 478         bmap = isl_basic_map_intersect(bmap, def);
 479         return bmap;
 480 error:
 481         isl_basic_map_free(bmap);
 482         isl_basic_map_free(def);
 483         return NULL;
 484 }
 485
 486 static __isl_give isl_basic_map *read_var_list(struct isl_stream *s,
 487         __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v)
 488 {
 489         int i = 0;
 490         struct isl_token *tok;
 491
 492         while ((tok = isl_stream_next_token(s)) != NULL) {
 493                 int new_name = 0;
 494
 495                 if (tok->type == ISL_TOKEN_IDENT) {
 496                         int n = v->n;
 497                         int p = vars_pos(v, tok->u.s, -1);
 498                         if (p < 0)
 499                                 goto error;
 500                         new_name = p >= n;
 501                 }
 502
 503                 if (new_name) {
 504                         bmap = isl_basic_map_add(bmap, type, 1);
 505                         bmap = set_name(bmap, type, i, v->v->name);
 506                         isl_token_free(tok);
 507                 } else if (tok->type == ISL_TOKEN_IDENT ||
 508                            tok->type == ISL_TOKEN_VALUE ||
 509                            tok->type == '-' ||
 510                            tok->type == '(') {
 511                         if (type == isl_dim_param) {
 512                                 isl_stream_error(s, tok,
 513                                                 "expecting unique identifier");
 514                                 goto error;
 515                         }
 516                         isl_stream_push_token(s, tok);
 517                         tok = NULL;
 518                         bmap = isl_basic_map_add(bmap, type, 1);
 519                         bmap = read_var_def(s, bmap, type, v);
 520                 } else
 521                         break;
 522
 523                 tok = isl_stream_next_token(s);
 524                 if (!tok || tok->type != ',')
 525                         break;
 526
 527                 isl_token_free(tok);
 528                 i++;
 529         }
 530         if (tok)
 531                 isl_stream_push_token(s, tok);
 532
 533         return bmap;
 534 error:
 535         isl_token_free(tok);
 536         isl_basic_map_free(bmap);
 537         return NULL;
 538 }
 539
 540 static __isl_give isl_mat *accept_affine_list(struct isl_stream *s,
 541         struct vars *v)
 542 {
 543         struct isl_vec *vec;
 544         struct isl_mat *mat;
 545         struct isl_token *tok = NULL;
 546
 547         vec = accept_affine(s, v);
 548         mat = isl_mat_from_row_vec(vec);
 549         if (!mat)
 550                 return NULL;
 551
 552         for (;;) {
 553                 tok = isl_stream_next_token(s);
 554                 if (!tok) {
 555                         isl_stream_error(s, NULL, "unexpected EOF");
 556                         goto error;
 557                 }
 558                 if (tok->type != ',') {
 559                         isl_stream_push_token(s, tok);
 560                         break;
 561                 }
 562                 isl_token_free(tok);
 563
 564                 vec = accept_affine(s, v);
 565                 mat = isl_mat_add_zero_cols(mat, 1 + v->n - isl_mat_cols(mat));
 566                 mat = isl_mat_vec_concat(mat, vec);
 567                 if (!mat)
 568                         return NULL;
 569         }
 570
 571         return mat;
 572 error:
 573         isl_mat_free(mat);
 574         return NULL;
 575 }
 576
 577 static int read_div_definition(struct isl_stream *s, struct vars *v)
 578 {
 579         struct isl_token *tok;
 580         int seen_paren = 0;
 581         struct isl_vec *aff;
 582         struct variable *var;
 583
 584         if (isl_stream_eat(s, '['))
 585                 return -1;
 586
 587         tok = isl_stream_next_token(s);
 588         if (!tok)
 589                 return -1;
 590         if (tok->type == '(') {
 591                 seen_paren = 1;
 592                 isl_token_free(tok);
 593         } else
 594                 isl_stream_push_token(s, tok);
 595
 596         var = v->v;
 597
 598         aff = accept_affine(s, v);
 599         if (!aff)
 600                 return -1;
 601
 602         var->def = isl_vec_alloc(s->ctx, 2 + v->n);
 603         if (!var->def) {
 604                 isl_vec_free(aff);
 605                 return -1;
 606         }
 607
 608         isl_seq_cpy(var->def->el + 1, aff->el, aff->size);
 609
 610         isl_vec_free(aff);
 611
 612         if (seen_paren && isl_stream_eat(s, ')'))
 613                 return -1;
 614         if (isl_stream_eat(s, '/'))
 615                 return -1;
 616
 617         tok = isl_stream_next_token(s);
 618         if (!tok)
 619                 return -1;
 620         if (tok->type != ISL_TOKEN_VALUE) {
 621                 isl_stream_error(s, tok, "expected denominator");
 622                 isl_stream_push_token(s, tok);
 623                 return -1;
 624         }
 625         isl_int_set(var->def->el[0], tok->u.v);
 626         isl_token_free(tok);
 627
 628         if (isl_stream_eat(s, ']'))
 629                 return -1;
 630
 631         return 0;
 632 }
 633
 634 static struct isl_basic_map *add_div_definition(struct isl_stream *s,
 635         struct vars *v, struct isl_basic_map *bmap, int k)
 636 {
 637         struct variable *var = v->v;
 638
 639         if (read_div_definition(s, v) < 0)
 640                 goto error;
 641
 642         isl_seq_cpy(bmap->div[k], var->def->el, 2 + v->n);
 643
 644         if (isl_basic_map_add_div_constraints(bmap, k) < 0)
 645                 goto error;
 646
 647         return bmap;
 648 error:
 649         isl_basic_map_free(bmap);
 650         return NULL;
 651 }
 652
 653 static struct isl_basic_map *read_defined_var_list(struct isl_stream *s,
 654         struct vars *v, struct isl_basic_map *bmap)
 655 {
 656         struct isl_token *tok;
 657
 658         while ((tok = isl_stream_next_token(s)) != NULL) {
 659                 int k;
 660                 int p;
 661                 int n = v->n;
 662                 unsigned total = isl_basic_map_total_dim(bmap);
 663
 664                 if (tok->type != ISL_TOKEN_IDENT)
 665                         break;
 666
 667                 p = vars_pos(v, tok->u.s, -1);
 668                 if (p < 0)
 669                         goto error;
 670                 if (p < n) {
 671                         isl_stream_error(s, tok, "expecting unique identifier");
 672                         goto error;
 673                 }
 674
 675                 bmap = isl_basic_map_cow(bmap);
 676                 bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
 677                                                 1, 0, 2);
 678
 679                 if ((k = isl_basic_map_alloc_div(bmap)) < 0)
 680                         goto error;
 681                 isl_seq_clr(bmap->div[k], 1 + 1 + total);
 682
 683                 isl_token_free(tok);
 684                 tok = isl_stream_next_token(s);
 685                 if (tok && tok->type == '=') {
 686                         isl_token_free(tok);
 687                         bmap = add_div_definition(s, v, bmap, k);
 688                         tok = isl_stream_next_token(s);
 689                 }
 690
 691                 if (!tok || tok->type != ',')
 692                         break;
 693
 694                 isl_token_free(tok);
 695         }
 696         if (tok)
 697                 isl_stream_push_token(s, tok);
 698
 699         return bmap;
 700 error:
 701         isl_token_free(tok);
 702         isl_basic_map_free(bmap);
 703         return NULL;
 704 }
 705
 706 static int next_is_tuple(struct isl_stream *s)
 707 {
 708         struct isl_token *tok;
 709         int is_tuple;
 710
 711         tok = isl_stream_next_token(s);
 712         if (!tok)
 713                 return 0;
 714         if (tok->type == '[') {
 715                 isl_stream_push_token(s, tok);
 716                 return 1;
 717         }
 718         if (tok->type != ISL_TOKEN_IDENT && !tok->is_keyword) {
 719                 isl_stream_push_token(s, tok);
 720                 return 0;
 721         }
 722
 723         is_tuple = isl_stream_next_token_is(s, '[');
 724
 725         isl_stream_push_token(s, tok);
 726
 727         return is_tuple;
 728 }
 729
 730 static __isl_give isl_basic_map *read_tuple(struct isl_stream *s,
 731         __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v);
 732
 733 static __isl_give isl_basic_map *read_nested_tuple(struct isl_stream *s,
 734         __isl_take isl_basic_map *bmap, struct vars *v)
 735 {
 736         bmap = read_tuple(s, bmap, isl_dim_in, v);
 737         if (isl_stream_eat(s, ISL_TOKEN_TO))
 738                 goto error;
 739         bmap = read_tuple(s, bmap, isl_dim_out, v);
 740         bmap = isl_basic_map_from_range(isl_basic_map_wrap(bmap));
 741         return bmap;
 742 error:
 743         isl_basic_map_free(bmap);
 744         return NULL;
 745 }
 746
 747 static __isl_give isl_basic_map *read_tuple(struct isl_stream *s,
 748         __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v)
 749 {
 750         struct isl_token *tok;
 751         char *name = NULL;
 752
 753         tok = isl_stream_next_token(s);
 754         if (tok && (tok->type == ISL_TOKEN_IDENT || tok->is_keyword)) {
 755                 name = strdup(tok->u.s);
 756                 if (!name)
 757                         goto error;
 758                 isl_token_free(tok);
 759                 tok = isl_stream_next_token(s);
 760         }
 761         if (!tok || tok->type != '[') {
 762                 isl_stream_error(s, tok, "expecting '['");
 763                 goto error;
 764         }
 765         isl_token_free(tok);
 766         if (type != isl_dim_param && next_is_tuple(s)) {
 767                 isl_dim *dim = isl_basic_map_get_dim(bmap);
 768                 int nparam = isl_dim_size(dim, isl_dim_param);
 769                 int n_in = isl_dim_size(dim, isl_dim_in);
 770                 isl_basic_map *nested;
 771                 if (type == isl_dim_out)
 772                         dim = isl_dim_move(dim, isl_dim_param, nparam,
 773                                                 isl_dim_in, 0, n_in);
 774                 nested = isl_basic_map_alloc_dim(dim, 0, 0, 0);
 775                 nested = read_nested_tuple(s, nested, v);
 776                 if (type == isl_dim_in) {
 777                         nested = isl_basic_map_reverse(nested);
 778                         bmap = isl_basic_map_intersect(nested, bmap);
 779                 } else {
 780                         isl_basic_set *bset;
 781                         dim = isl_dim_range(isl_basic_map_get_dim(nested));
 782                         dim = isl_dim_drop(dim, isl_dim_param, nparam, n_in);
 783                         dim = isl_dim_join(isl_basic_map_get_dim(bmap), dim);
 784                         bset = isl_basic_map_domain(bmap);
 785                         nested = isl_basic_map_reset_dim(nested, dim);
 786                         bmap = isl_basic_map_intersect_domain(nested, bset);
 787                 }
 788         } else
 789                 bmap = read_var_list(s, bmap, type, v);
 790         tok = isl_stream_next_token(s);
 791         if (!tok || tok->type != ']') {
 792                 isl_stream_error(s, tok, "expecting ']'");
 793                 goto error;
 794         }
 795         isl_token_free(tok);
 796
 797         if (name) {
 798                 bmap = isl_basic_map_set_tuple_name(bmap, type, name);
 799                 free(name);
 800         }
 801
 802         return bmap;
 803 error:
 804         if (tok)
 805                 isl_token_free(tok);
 806         isl_basic_map_free(bmap);
 807         return NULL;
 808 }
 809
 810 static struct isl_basic_map *add_constraints(struct isl_stream *s,
 811         struct vars *v, struct isl_basic_map *bmap);
 812
 813 static struct isl_basic_map *add_exists(struct isl_stream *s,
 814         struct vars *v, struct isl_basic_map *bmap)
 815 {
 816         struct isl_token *tok;
 817         int n = v->n;
 818         int extra;
 819         int seen_paren = 0;
 820         int i;
 821         unsigned total;
 822
 823         tok = isl_stream_next_token(s);
 824         if (!tok)
 825                 goto error;
 826         if (tok->type == '(') {
 827                 seen_paren = 1;
 828                 isl_token_free(tok);
 829         } else
 830                 isl_stream_push_token(s, tok);
 831
 832         bmap = read_defined_var_list(s, v, bmap);
 833         if (!bmap)
 834                 goto error;
 835
 836         if (isl_stream_eat(s, ':'))
 837                 goto error;
 838         bmap = add_constraints(s, v, bmap);
 839         if (seen_paren && isl_stream_eat(s, ')'))
 840                 goto error;
 841         return bmap;
 842 error:
 843         isl_basic_map_free(bmap);
 844         return NULL;
 845 }
 846
 847 static __isl_give isl_basic_map *construct_constraint(
 848         __isl_take isl_basic_map *bmap, enum isl_token_type type,
 849         isl_int *left, isl_int *right)
 850 {
 851         int k;
 852         unsigned len;
 853         struct isl_ctx *ctx;
 854
 855         if (!bmap)
 856                 return NULL;
 857         len = 1 + isl_basic_map_total_dim(bmap);
 858         ctx = bmap->ctx;
 859
 860         k = isl_basic_map_alloc_inequality(bmap);
 861         if (k < 0)
 862                 goto error;
 863         if (type == ISL_TOKEN_LE)
 864                 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
 865                                                ctx->one, right,
 866                                                len);
 867         else if (type == ISL_TOKEN_GE)
 868                 isl_seq_combine(bmap->ineq[k], ctx->one, left,
 869                                                ctx->negone, right,
 870                                                len);
 871         else if (type == ISL_TOKEN_LT) {
 872                 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
 873                                                ctx->one, right,
 874                                                len);
 875                 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
 876         } else if (type == ISL_TOKEN_GT) {
 877                 isl_seq_combine(bmap->ineq[k], ctx->one, left,
 878                                                ctx->negone, right,
 879                                                len);
 880                 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
 881         } else {
 882                 isl_seq_combine(bmap->ineq[k], ctx->one, left,
 883                                                ctx->negone, right,
 884                                                len);
 885                 isl_basic_map_inequality_to_equality(bmap, k);
 886         }
 887
 888         return bmap;
 889 error:
 890         isl_basic_map_free(bmap);
 891         return NULL;
 892 }
 893
 894 static int is_comparator(struct isl_token *tok)
 895 {
 896         if (!tok)
 897                 return 0;
 898
 899         switch (tok->type) {
 900         case ISL_TOKEN_LT:
 901         case ISL_TOKEN_GT:
 902         case ISL_TOKEN_LE:
 903         case ISL_TOKEN_GE:
 904         case '=':
 905                 return 1;
 906         default:
 907                 return 0;
 908         }
 909 }
 910
 911 static struct isl_basic_map *add_constraint(struct isl_stream *s,
 912         struct vars *v, struct isl_basic_map *bmap)
 913 {
 914         int i, j;
 915         struct isl_token *tok = NULL;
 916         struct isl_mat *aff1 = NULL, *aff2 = NULL;
 917
 918         tok = isl_stream_next_token(s);
 919         if (!tok)
 920                 goto error;
 921         if (tok->type == ISL_TOKEN_EXISTS) {
 922                 isl_token_free(tok);
 923                 return add_exists(s, v, bmap);
 924         }
 925         isl_stream_push_token(s, tok);
 926         tok = NULL;
 927
 928         bmap = isl_basic_map_cow(bmap);
 929
 930         aff1 = accept_affine_list(s, v);
 931         if (!aff1)
 932                 goto error;
 933         tok = isl_stream_next_token(s);
 934         if (!is_comparator(tok)) {
 935                 isl_stream_error(s, tok, "missing operator");
 936                 if (tok)
 937                         isl_stream_push_token(s, tok);
 938                 tok = NULL;
 939                 goto error;
 940         }
 941         for (;;) {
 942                 aff2 = accept_affine_list(s, v);
 943                 if (!aff2)
 944                         goto error;
 945
 946                 aff1 = isl_mat_add_zero_cols(aff1, aff2->n_col - aff1->n_col);
 947                 if (!aff1)
 948                         goto error;
 949                 bmap = add_divs(bmap, v);
 950                 bmap = isl_basic_map_extend_constraints(bmap, 0,
 951                                                 aff1->n_row * aff2->n_row);
 952                 for (i = 0; i < aff1->n_row; ++i)
 953                         for (j = 0; j < aff2->n_row; ++j)
 954                                 bmap = construct_constraint(bmap, tok->type,
 955                                                     aff1->row[i], aff2->row[j]);
 956                 isl_token_free(tok);
 957                 isl_mat_free(aff1);
 958                 aff1 = aff2;
 959
 960                 tok = isl_stream_next_token(s);
 961                 if (!is_comparator(tok)) {
 962                         if (tok)
 963                                 isl_stream_push_token(s, tok);
 964                         break;
 965                 }
 966         }
 967         isl_mat_free(aff1);
 968
 969         return bmap;
 970 error:
 971         if (tok)
 972                 isl_token_free(tok);
 973         isl_mat_free(aff1);
 974         isl_mat_free(aff2);
 975         isl_basic_map_free(bmap);
 976         return NULL;
 977 }
 978
 979 static struct isl_basic_map *add_constraints(struct isl_stream *s,
 980         struct vars *v, struct isl_basic_map *bmap)
 981 {
 982         struct isl_token *tok;
 983
 984         for (;;) {
 985                 bmap = add_constraint(s, v, bmap);
 986                 if (!bmap)
 987                         return NULL;
 988                 tok = isl_stream_next_token(s);
 989                 if (!tok) {
 990                         isl_stream_error(s, NULL, "unexpected EOF");
 991                         goto error;
 992                 }
 993                 if (tok->type != ISL_TOKEN_AND)
 994                         break;
 995                 isl_token_free(tok);
 996         }
 997         isl_stream_push_token(s, tok);
 998
 999         return bmap;
1000 error:
1001         if (tok)
1002                 isl_token_free(tok);
1003         isl_basic_map_free(bmap);
1004         return NULL;
1005 }
1006
1007 static isl_map *read_constraint(struct isl_stream *s,
1008         struct vars *v, __isl_take isl_basic_map *bmap)
1009 {
1010         int n = v->n;
1011
1012         if (!bmap)
1013                 return NULL;
1014
1015         bmap = add_constraint(s, v, bmap);
1016         bmap = isl_basic_map_simplify(bmap);
1017         bmap = isl_basic_map_finalize(bmap);
1018
1019         vars_drop(v, v->n - n);
1020
1021         return isl_map_from_basic_map(bmap);
1022 error:
1023         isl_basic_map_free(bmap);
1024         return NULL;
1025 }
1026
1027 static struct isl_map *read_disjuncts(struct isl_stream *s,
1028         struct vars *v, __isl_take isl_basic_map *bmap);
1029
1030 static __isl_give isl_map *read_conjunct(struct isl_stream *s,
1031         struct vars *v, __isl_take isl_basic_map *bmap)
1032 {
1033         isl_map *map;
1034
1035         if (isl_stream_eat_if_available(s, '(')) {
1036                 map = read_disjuncts(s, v, bmap);
1037                 if (isl_stream_eat(s, ')'))
1038                         goto error;
1039                 return map;
1040         }
1041
1042         return read_constraint(s, v, bmap);
1043 error:
1044         isl_map_free(map);
1045         return NULL;
1046 }
1047
1048 static __isl_give isl_map *read_conjuncts(struct isl_stream *s,
1049         struct vars *v, __isl_take isl_basic_map *bmap)
1050 {
1051         isl_map *map;
1052
1053         map = read_conjunct(s, v, isl_basic_map_copy(bmap));
1054         while (isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
1055                 isl_map *map_i;
1056
1057                 map_i = read_conjunct(s, v, isl_basic_map_copy(bmap));
1058                 map = isl_map_intersect(map, map_i);
1059         }
1060
1061         isl_basic_map_free(bmap);
1062         return map;
1063 }
1064
1065 static struct isl_map *read_disjuncts(struct isl_stream *s,
1066         struct vars *v, __isl_take isl_basic_map *bmap)
1067 {
1068         struct isl_map *map;
1069
1070         if (isl_stream_next_token_is(s, '}')) {
1071                 isl_dim *dim = isl_basic_map_get_dim(bmap);
1072                 isl_basic_map_free(bmap);
1073                 return isl_map_universe(dim);
1074         }
1075
1076         map = read_conjuncts(s, v, isl_basic_map_copy(bmap));
1077         while (isl_stream_eat_if_available(s, ISL_TOKEN_OR)) {
1078                 isl_map *map_i;
1079
1080                 map_i = read_conjuncts(s, v, isl_basic_map_copy(bmap));
1081                 map = isl_map_union(map, map_i);
1082         }
1083
1084         isl_basic_map_free(bmap);
1085         return map;
1086 }
1087
1088 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
1089 {
1090         if (pos < isl_basic_map_dim(bmap, isl_dim_out))
1091                 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1092                            isl_basic_map_dim(bmap, isl_dim_in) + pos;
1093         pos -= isl_basic_map_dim(bmap, isl_dim_out);
1094
1095         if (pos < isl_basic_map_dim(bmap, isl_dim_in))
1096                 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
1097         pos -= isl_basic_map_dim(bmap, isl_dim_in);
1098
1099         if (pos < isl_basic_map_dim(bmap, isl_dim_div))
1100                 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1101                            isl_basic_map_dim(bmap, isl_dim_in) +
1102                            isl_basic_map_dim(bmap, isl_dim_out) + pos;
1103         pos -= isl_basic_map_dim(bmap, isl_dim_div);
1104
1105         if (pos < isl_basic_map_dim(bmap, isl_dim_param))
1106                 return 1 + pos;
1107
1108         return 0;
1109 }
1110
1111 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
1112         struct isl_stream *s, __isl_take isl_basic_map *bmap)
1113 {
1114         int j;
1115         struct isl_token *tok;
1116         int type;
1117         int k;
1118         isl_int *c;
1119         unsigned nparam;
1120         unsigned dim;
1121
1122         if (!bmap)
1123                 return NULL;
1124
1125         nparam = isl_basic_map_dim(bmap, isl_dim_param);
1126         dim = isl_basic_map_dim(bmap, isl_dim_out);
1127
1128         tok = isl_stream_next_token(s);
1129         if (!tok || tok->type != ISL_TOKEN_VALUE) {
1130                 isl_stream_error(s, tok, "expecting coefficient");
1131                 if (tok)
1132                         isl_stream_push_token(s, tok);
1133                 goto error;
1134         }
1135         if (!tok->on_new_line) {
1136                 isl_stream_error(s, tok, "coefficient should appear on new line");
1137                 isl_stream_push_token(s, tok);
1138                 goto error;
1139         }
1140
1141         type = isl_int_get_si(tok->u.v);
1142         isl_token_free(tok);
1143
1144         isl_assert(s->ctx, type == 0 || type == 1, goto error);
1145         if (type == 0) {
1146                 k = isl_basic_map_alloc_equality(bmap);
1147                 c = bmap->eq[k];
1148         } else {
1149                 k = isl_basic_map_alloc_inequality(bmap);
1150                 c = bmap->ineq[k];
1151         }
1152         if (k < 0)
1153                 goto error;
1154
1155         for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
1156                 int pos;
1157                 tok = isl_stream_next_token(s);
1158                 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1159                         isl_stream_error(s, tok, "expecting coefficient");
1160                         if (tok)
1161                                 isl_stream_push_token(s, tok);
1162                         goto error;
1163                 }
1164                 if (tok->on_new_line) {
1165                         isl_stream_error(s, tok,
1166                                 "coefficient should not appear on new line");
1167                         isl_stream_push_token(s, tok);
1168                         goto error;
1169                 }
1170                 pos = polylib_pos_to_isl_pos(bmap, j);
1171                 isl_int_set(c[pos], tok->u.v);
1172                 isl_token_free(tok);
1173         }
1174
1175         return bmap;
1176 error:
1177         isl_basic_map_free(bmap);
1178         return NULL;
1179 }
1180
1181 static __isl_give isl_basic_map *basic_map_read_polylib(struct isl_stream *s,
1182         int nparam)
1183 {
1184         int i;
1185         struct isl_token *tok;
1186         struct isl_token *tok2;
1187         int n_row, n_col;
1188         int on_new_line;
1189         unsigned in = 0, out, local = 0;
1190         struct isl_basic_map *bmap = NULL;
1191
1192         if (nparam < 0)
1193                 nparam = 0;
1194
1195         tok = isl_stream_next_token(s);
1196         if (!tok) {
1197                 isl_stream_error(s, NULL, "unexpected EOF");
1198                 return NULL;
1199         }
1200         tok2 = isl_stream_next_token(s);
1201         if (!tok2) {
1202                 isl_token_free(tok);
1203                 isl_stream_error(s, NULL, "unexpected EOF");
1204                 return NULL;
1205         }
1206         if (tok->type != ISL_TOKEN_VALUE || tok2->type != ISL_TOKEN_VALUE) {
1207                 isl_stream_push_token(s, tok2);
1208                 isl_stream_push_token(s, tok);
1209                 isl_stream_error(s, NULL,
1210                                  "expecting constraint matrix dimensions");
1211                 return NULL;
1212         }
1213         n_row = isl_int_get_si(tok->u.v);
1214         n_col = isl_int_get_si(tok2->u.v);
1215         on_new_line = tok2->on_new_line;
1216         isl_token_free(tok2);
1217         isl_token_free(tok);
1218         isl_assert(s->ctx, !on_new_line, return NULL);
1219         isl_assert(s->ctx, n_row >= 0, return NULL);
1220         isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
1221         tok = isl_stream_next_token_on_same_line(s);
1222         if (tok) {
1223                 if (tok->type != ISL_TOKEN_VALUE) {
1224                         isl_stream_error(s, tok,
1225                                     "expecting number of output dimensions");
1226                         isl_stream_push_token(s, tok);
1227                         goto error;
1228                 }
1229                 out = isl_int_get_si(tok->u.v);
1230                 isl_token_free(tok);
1231
1232                 tok = isl_stream_next_token_on_same_line(s);
1233                 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1234                         isl_stream_error(s, tok,
1235                                     "expecting number of input dimensions");
1236                         if (tok)
1237                                 isl_stream_push_token(s, tok);
1238                         goto error;
1239                 }
1240                 in = isl_int_get_si(tok->u.v);
1241                 isl_token_free(tok);
1242
1243                 tok = isl_stream_next_token_on_same_line(s);
1244                 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1245                         isl_stream_error(s, tok,
1246                                     "expecting number of existentials");
1247                         if (tok)
1248                                 isl_stream_push_token(s, tok);
1249                         goto error;
1250                 }
1251                 local = isl_int_get_si(tok->u.v);
1252                 isl_token_free(tok);
1253
1254                 tok = isl_stream_next_token_on_same_line(s);
1255                 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1256                         isl_stream_error(s, tok,
1257                                     "expecting number of parameters");
1258                         if (tok)
1259                                 isl_stream_push_token(s, tok);
1260                         goto error;
1261                 }
1262                 nparam = isl_int_get_si(tok->u.v);
1263                 isl_token_free(tok);
1264                 if (n_col != 1 + out + in + local + nparam + 1) {
1265                         isl_stream_error(s, NULL,
1266                                     "dimensions don't match");
1267                         goto error;
1268                 }
1269         } else
1270                 out = n_col - 2 - nparam;
1271         bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
1272         if (!bmap)
1273                 return NULL;
1274
1275         for (i = 0; i < local; ++i) {
1276                 int k = isl_basic_map_alloc_div(bmap);
1277                 if (k < 0)
1278                         goto error;
1279                 isl_seq_clr(bmap->div[k], 1 + 1 + nparam + in + out + local);
1280         }
1281
1282         for (i = 0; i < n_row; ++i)
1283                 bmap = basic_map_read_polylib_constraint(s, bmap);
1284
1285         tok = isl_stream_next_token_on_same_line(s);
1286         if (tok) {
1287                 isl_stream_error(s, tok, "unexpected extra token on line");
1288                 isl_stream_push_token(s, tok);
1289                 goto error;
1290         }
1291
1292         bmap = isl_basic_map_simplify(bmap);
1293         bmap = isl_basic_map_finalize(bmap);
1294         return bmap;
1295 error:
1296         isl_basic_map_free(bmap);
1297         return NULL;
1298 }
1299
1300 static struct isl_map *map_read_polylib(struct isl_stream *s, int nparam)
1301 {
1302         struct isl_token *tok;
1303         struct isl_token *tok2;
1304         int i, n;
1305         struct isl_map *map;
1306
1307         tok = isl_stream_next_token(s);
1308         if (!tok) {
1309                 isl_stream_error(s, NULL, "unexpected EOF");
1310                 return NULL;
1311         }
1312         tok2 = isl_stream_next_token_on_same_line(s);
1313         if (tok2 && tok2->type == ISL_TOKEN_VALUE) {
1314                 isl_stream_push_token(s, tok2);
1315                 isl_stream_push_token(s, tok);
1316                 return isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
1317         }
1318         if (tok2) {
1319                 isl_stream_error(s, tok2, "unexpected token");
1320                 isl_stream_push_token(s, tok2);
1321                 isl_stream_push_token(s, tok);
1322                 return NULL;
1323         }
1324         n = isl_int_get_si(tok->u.v);
1325         isl_token_free(tok);
1326
1327         isl_assert(s->ctx, n >= 1, return NULL);
1328
1329         map = isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
1330
1331         for (i = 1; map && i < n; ++i)
1332                 map = isl_map_union(map,
1333                         isl_map_from_basic_map(basic_map_read_polylib(s, nparam)));
1334
1335         return map;
1336 }
1337
1338 static int optional_power(struct isl_stream *s)
1339 {
1340         int pow;
1341         struct isl_token *tok;
1342
1343         tok = isl_stream_next_token(s);
1344         if (!tok)
1345                 return 1;
1346         if (tok->type != '^') {
1347                 isl_stream_push_token(s, tok);
1348                 return 1;
1349         }
1350         isl_token_free(tok);
1351         tok = isl_stream_next_token(s);
1352         if (!tok || tok->type != ISL_TOKEN_VALUE) {
1353                 isl_stream_error(s, tok, "expecting exponent");
1354                 if (tok)
1355                         isl_stream_push_token(s, tok);
1356                 return 1;
1357         }
1358         pow = isl_int_get_si(tok->u.v);
1359         isl_token_free(tok);
1360         return pow;
1361 }
1362
1363 static __isl_give isl_div *read_div(struct isl_stream *s,
1364         __isl_take isl_dim *dim, struct vars *v)
1365 {
1366         int n;
1367         isl_basic_map *bmap;
1368
1369         n = v->n;
1370         bmap = isl_basic_map_universe(dim);
1371
1372         if (vars_add_anon(v) < 0)
1373                 goto error;
1374         if (read_div_definition(s, v) < 0)
1375                 goto error;
1376         bmap = add_divs(bmap, v);
1377         bmap = isl_basic_map_order_divs(bmap);
1378         if (!bmap)
1379                 goto error;
1380         vars_drop(v, v->n - n);
1381
1382         return isl_basic_map_div(bmap, bmap->n_div - 1);
1383 error:
1384         isl_basic_map_free(bmap);
1385         return NULL;
1386 }
1387
1388 static __isl_give isl_qpolynomial *read_term(struct isl_stream *s,
1389         __isl_keep isl_basic_map *bmap, struct vars *v);
1390
1391 static __isl_give isl_qpolynomial *read_factor(struct isl_stream *s,
1392         __isl_keep isl_basic_map *bmap, struct vars *v)
1393 {
1394         struct isl_qpolynomial *qp;
1395         struct isl_token *tok;
1396
1397         tok = isl_stream_next_token(s);
1398         if (!tok) {
1399                 isl_stream_error(s, NULL, "unexpected EOF");
1400                 return NULL;
1401         }
1402         if (tok->type == '(') {
1403                 int pow;
1404
1405                 isl_token_free(tok);
1406                 qp = read_term(s, bmap, v);
1407                 if (!qp)
1408                         return NULL;
1409                 if (isl_stream_eat(s, ')'))
1410                         goto error;
1411                 pow = optional_power(s);
1412                 qp = isl_qpolynomial_pow(qp, pow);
1413         } else if (tok->type == ISL_TOKEN_VALUE) {
1414                 struct isl_token *tok2;
1415                 tok2 = isl_stream_next_token(s);
1416                 if (tok2 && tok2->type == '/') {
1417                         isl_token_free(tok2);
1418                         tok2 = isl_stream_next_token(s);
1419                         if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
1420                                 isl_stream_error(s, tok2, "expected denominator");
1421                                 isl_token_free(tok);
1422                                 isl_token_free(tok2);
1423                                 return NULL;
1424                         }
1425                         qp = isl_qpolynomial_rat_cst(isl_basic_map_get_dim(bmap),
1426                                                     tok->u.v, tok2->u.v);
1427                         isl_token_free(tok2);
1428                 } else {
1429                         isl_stream_push_token(s, tok2);
1430                         qp = isl_qpolynomial_cst(isl_basic_map_get_dim(bmap),
1431                                                 tok->u.v);
1432                 }
1433                 isl_token_free(tok);
1434         } else if (tok->type == ISL_TOKEN_INFTY) {
1435                 isl_token_free(tok);
1436                 qp = isl_qpolynomial_infty(isl_basic_map_get_dim(bmap));
1437         } else if (tok->type == ISL_TOKEN_NAN) {
1438                 isl_token_free(tok);
1439                 qp = isl_qpolynomial_nan(isl_basic_map_get_dim(bmap));
1440         } else if (tok->type == ISL_TOKEN_IDENT) {
1441                 int n = v->n;
1442                 int pos = vars_pos(v, tok->u.s, -1);
1443                 int pow;
1444                 if (pos < 0) {
1445                         isl_token_free(tok);
1446                         return NULL;
1447                 }
1448                 if (pos >= n) {
1449                         vars_drop(v, v->n - n);
1450                         isl_stream_error(s, tok, "unknown identifier");
1451                         isl_token_free(tok);
1452                         return NULL;
1453                 }
1454                 isl_token_free(tok);
1455                 pow = optional_power(s);
1456                 qp = isl_qpolynomial_var_pow(isl_basic_map_get_dim(bmap), pos, pow);
1457         } else if (tok->type == '[') {
1458                 isl_div *div;
1459                 int pow;
1460
1461                 isl_stream_push_token(s, tok);
1462                 div = read_div(s, isl_basic_map_get_dim(bmap), v);
1463                 pow = optional_power(s);
1464                 qp = isl_qpolynomial_div_pow(div, pow);
1465         } else if (tok->type == '-') {
1466                 struct isl_qpolynomial *qp2;
1467
1468                 isl_token_free(tok);
1469                 qp = isl_qpolynomial_cst(isl_basic_map_get_dim(bmap),
1470                                             s->ctx->negone);
1471                 qp2 = read_factor(s, bmap, v);
1472                 qp = isl_qpolynomial_mul(qp, qp2);
1473         } else {
1474                 isl_stream_error(s, tok, "unexpected isl_token");
1475                 isl_stream_push_token(s, tok);
1476                 return NULL;
1477         }
1478
1479         if (isl_stream_eat_if_available(s, '*') ||
1480             isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
1481                 struct isl_qpolynomial *qp2;
1482
1483                 qp2 = read_factor(s, bmap, v);
1484                 qp = isl_qpolynomial_mul(qp, qp2);
1485         }
1486
1487         return qp;
1488 error:
1489         isl_qpolynomial_free(qp);
1490         return NULL;
1491 }
1492
1493 static __isl_give isl_qpolynomial *read_term(struct isl_stream *s,
1494         __isl_keep isl_basic_map *bmap, struct vars *v)
1495 {
1496         struct isl_token *tok;
1497         struct isl_qpolynomial *qp;
1498
1499         qp = read_factor(s, bmap, v);
1500
1501         for (;;) {
1502                 tok = isl_stream_next_token(s);
1503                 if (!tok)
1504                         return qp;
1505
1506                 if (tok->type == '+') {
1507                         struct isl_qpolynomial *qp2;
1508
1509                         isl_token_free(tok);
1510                         qp2 = read_factor(s, bmap, v);
1511                         qp = isl_qpolynomial_add(qp, qp2);
1512                 } else if (tok->type == '-') {
1513                         struct isl_qpolynomial *qp2;
1514
1515                         isl_token_free(tok);
1516                         qp2 = read_factor(s, bmap, v);
1517                         qp = isl_qpolynomial_sub(qp, qp2);
1518                 } else if (tok->type == ISL_TOKEN_VALUE &&
1519                             isl_int_is_neg(tok->u.v)) {
1520                         struct isl_qpolynomial *qp2;
1521
1522                         isl_stream_push_token(s, tok);
1523                         qp2 = read_factor(s, bmap, v);
1524                         qp = isl_qpolynomial_add(qp, qp2);
1525                 } else {
1526                         isl_stream_push_token(s, tok);
1527                         break;
1528                 }
1529         }
1530
1531         return qp;
1532 }
1533
1534 static __isl_give isl_map *read_optional_disjuncts(struct isl_stream *s,
1535         __isl_take isl_basic_map *bmap, struct vars *v)
1536 {
1537         struct isl_token *tok;
1538         struct isl_map *map;
1539
1540         tok = isl_stream_next_token(s);
1541         if (!tok) {
1542                 isl_stream_error(s, NULL, "unexpected EOF");
1543                 goto error;
1544         }
1545         map = isl_map_from_basic_map(isl_basic_map_copy(bmap));
1546         if (tok->type == ':' ||
1547             (tok->type == ISL_TOKEN_OR && !strcmp(tok->u.s, "|"))) {
1548                 isl_token_free(tok);
1549                 map = isl_map_intersect(map,
1550                             read_disjuncts(s, v, isl_basic_map_copy(bmap)));
1551         } else
1552                 isl_stream_push_token(s, tok);
1553
1554         isl_basic_map_free(bmap);
1555
1556         return map;
1557 error:
1558         isl_basic_map_free(bmap);
1559         return NULL;
1560 }
1561
1562 static struct isl_obj obj_read_poly(struct isl_stream *s,
1563         __isl_take isl_basic_map *bmap, struct vars *v, int n)
1564 {
1565         struct isl_obj obj = { isl_obj_pw_qpolynomial, NULL };
1566         struct isl_pw_qpolynomial *pwqp;
1567         struct isl_qpolynomial *qp;
1568         struct isl_map *map;
1569         struct isl_set *set;
1570
1571         qp = read_term(s, bmap, v);
1572         map = read_optional_disjuncts(s, bmap, v);
1573         set = isl_map_range(map);
1574
1575         pwqp = isl_pw_qpolynomial_alloc(set, qp);
1576
1577         vars_drop(v, v->n - n);
1578
1579         obj.v = pwqp;
1580         return obj;
1581 }
1582
1583 static struct isl_obj obj_read_poly_or_fold(struct isl_stream *s,
1584         __isl_take isl_basic_map *bmap, struct vars *v, int n)
1585 {
1586         struct isl_obj obj = { isl_obj_pw_qpolynomial_fold, NULL };
1587         struct isl_obj obj_p;
1588         isl_qpolynomial *qp;
1589         isl_qpolynomial_fold *fold = NULL;
1590         isl_pw_qpolynomial_fold *pwf;
1591         isl_map *map;
1592         isl_set *set;
1593
1594         if (!isl_stream_eat_if_available(s, ISL_TOKEN_MAX))
1595                 return obj_read_poly(s, bmap, v, n);
1596
1597         if (isl_stream_eat(s, '('))
1598                 goto error;
1599
1600         qp = read_term(s, bmap, v);
1601         fold = isl_qpolynomial_fold_alloc(isl_fold_max, qp);
1602
1603         while (isl_stream_eat_if_available(s, ',')) {
1604                 isl_qpolynomial_fold *fold_i;
1605                 qp = read_term(s, bmap, v);
1606                 fold_i = isl_qpolynomial_fold_alloc(isl_fold_max, qp);
1607                 fold = isl_qpolynomial_fold_fold(fold, fold_i);
1608         }
1609
1610         if (isl_stream_eat(s, ')'))
1611                 goto error;
1612
1613         map = read_optional_disjuncts(s, bmap, v);
1614         set = isl_map_range(map);
1615         pwf = isl_pw_qpolynomial_fold_alloc(isl_fold_max, set, fold);
1616
1617         vars_drop(v, v->n - n);
1618
1619         obj.v = pwf;
1620         return obj;
1621 error:
1622         isl_basic_map_free(bmap);
1623         isl_qpolynomial_fold_free(fold);
1624         obj.type = isl_obj_none;
1625         return obj;
1626 }
1627
1628 static int is_rational(struct isl_stream *s)
1629 {
1630         struct isl_token *tok;
1631
1632         tok = isl_stream_next_token(s);
1633         if (!tok)
1634                 return 0;
1635         if (tok->type == ISL_TOKEN_RAT && isl_stream_next_token_is(s, ':')) {
1636                 isl_token_free(tok);
1637                 isl_stream_eat(s, ':');
1638                 return 1;
1639         }
1640
1641         isl_stream_push_token(s, tok);
1642
1643         return 0;
1644 }
1645
1646 static struct isl_obj obj_read_body(struct isl_stream *s,
1647         __isl_take isl_basic_map *bmap, struct vars *v)
1648 {
1649         struct isl_map *map = NULL;
1650         struct isl_token *tok;
1651         struct isl_obj obj = { isl_obj_set, NULL };
1652         int n = v->n;
1653
1654         if (is_rational(s))
1655                 bmap = isl_basic_map_set_rational(bmap);
1656
1657         if (!next_is_tuple(s))
1658                 return obj_read_poly_or_fold(s, bmap, v, n);
1659
1660         bmap = read_tuple(s, bmap, isl_dim_in, v);
1661         if (!bmap)
1662                 goto error;
1663         tok = isl_stream_next_token(s);
1664         if (tok && tok->type == ISL_TOKEN_TO) {
1665                 obj.type = isl_obj_map;
1666                 isl_token_free(tok);
1667                 if (!next_is_tuple(s)) {
1668                         bmap = isl_basic_map_reverse(bmap);
1669                         return obj_read_poly_or_fold(s, bmap, v, n);
1670                 }
1671                 bmap = read_tuple(s, bmap, isl_dim_out, v);
1672                 if (!bmap)
1673                         goto error;
1674         } else {
1675                 bmap = isl_basic_map_reverse(bmap);
1676                 if (tok)
1677                         isl_stream_push_token(s, tok);
1678         }
1679
1680         map = read_optional_disjuncts(s, bmap, v);
1681
1682         vars_drop(v, v->n - n);
1683
1684         obj.v = map;
1685         return obj;
1686 error:
1687         isl_basic_map_free(bmap);
1688         obj.type = isl_obj_none;
1689         return obj;
1690 }
1691
1692 static struct isl_obj to_union(isl_ctx *ctx, struct isl_obj obj)
1693 {
1694         if (obj.type == isl_obj_map) {
1695                 obj.v = isl_union_map_from_map(obj.v);
1696                 obj.type = isl_obj_union_map;
1697         } else if (obj.type == isl_obj_set) {
1698                 obj.v = isl_union_set_from_set(obj.v);
1699                 obj.type = isl_obj_union_set;
1700         } else if (obj.type == isl_obj_pw_qpolynomial) {
1701                 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
1702                 obj.type = isl_obj_union_pw_qpolynomial;
1703         } else if (obj.type == isl_obj_pw_qpolynomial_fold) {
1704                 obj.v = isl_union_pw_qpolynomial_fold_from_pw_qpolynomial_fold(obj.v);
1705                 obj.type = isl_obj_union_pw_qpolynomial_fold;
1706         } else
1707                 isl_assert(ctx, 0, goto error);
1708         return obj;
1709 error:
1710         obj.type->free(obj.v);
1711         obj.type = isl_obj_none;
1712         return obj;
1713 }
1714
1715 static struct isl_obj obj_add(struct isl_ctx *ctx,
1716         struct isl_obj obj1, struct isl_obj obj2)
1717 {
1718         if (obj1.type == isl_obj_set && obj2.type == isl_obj_union_set)
1719                 obj1 = to_union(ctx, obj1);
1720         if (obj1.type == isl_obj_union_set && obj2.type == isl_obj_set)
1721                 obj2 = to_union(ctx, obj2);
1722         if (obj1.type == isl_obj_map && obj2.type == isl_obj_union_map)
1723                 obj1 = to_union(ctx, obj1);
1724         if (obj1.type == isl_obj_union_map && obj2.type == isl_obj_map)
1725                 obj2 = to_union(ctx, obj2);
1726         if (obj1.type == isl_obj_pw_qpolynomial &&
1727             obj2.type == isl_obj_union_pw_qpolynomial)
1728                 obj1 = to_union(ctx, obj1);
1729         if (obj1.type == isl_obj_union_pw_qpolynomial &&
1730             obj2.type == isl_obj_pw_qpolynomial)
1731                 obj2 = to_union(ctx, obj2);
1732         if (obj1.type == isl_obj_pw_qpolynomial_fold &&
1733             obj2.type == isl_obj_union_pw_qpolynomial_fold)
1734                 obj1 = to_union(ctx, obj1);
1735         if (obj1.type == isl_obj_union_pw_qpolynomial_fold &&
1736             obj2.type == isl_obj_pw_qpolynomial_fold)
1737                 obj2 = to_union(ctx, obj2);
1738         isl_assert(ctx, obj1.type == obj2.type, goto error);
1739         if (obj1.type == isl_obj_map && !isl_map_has_equal_dim(obj1.v, obj2.v)) {
1740                 obj1 = to_union(ctx, obj1);
1741                 obj2 = to_union(ctx, obj2);
1742         }
1743         if (obj1.type == isl_obj_set && !isl_set_has_equal_dim(obj1.v, obj2.v)) {
1744                 obj1 = to_union(ctx, obj1);
1745                 obj2 = to_union(ctx, obj2);
1746         }
1747         if (obj1.type == isl_obj_pw_qpolynomial &&
1748             !isl_pw_qpolynomial_has_equal_dim(obj1.v, obj2.v)) {
1749                 obj1 = to_union(ctx, obj1);
1750                 obj2 = to_union(ctx, obj2);
1751         }
1752         if (obj1.type == isl_obj_pw_qpolynomial_fold &&
1753             !isl_pw_qpolynomial_fold_has_equal_dim(obj1.v, obj2.v)) {
1754                 obj1 = to_union(ctx, obj1);
1755                 obj2 = to_union(ctx, obj2);
1756         }
1757         obj1.v = obj1.type->add(obj1.v, obj2.v);
1758         return obj1;
1759 error:
1760         obj1.type->free(obj1.v);
1761         obj2.type->free(obj2.v);
1762         obj1.type = isl_obj_none;
1763         obj1.v = NULL;
1764         return obj1;
1765 }
1766
1767 static struct isl_obj obj_read(struct isl_stream *s, int nparam)
1768 {
1769         isl_basic_map *bmap = NULL;
1770         struct isl_token *tok;
1771         struct vars *v = NULL;
1772         struct isl_obj obj = { isl_obj_set, NULL };
1773
1774         tok = isl_stream_next_token(s);
1775         if (!tok) {
1776                 isl_stream_error(s, NULL, "unexpected EOF");
1777                 goto error;
1778         }
1779         if (tok->type == ISL_TOKEN_VALUE) {
1780                 struct isl_token *tok2;
1781                 struct isl_map *map;
1782
1783                 tok2 = isl_stream_next_token(s);
1784                 if (!tok2 || tok2->type != ISL_TOKEN_VALUE ||
1785                     isl_int_is_neg(tok2->u.v)) {
1786                         if (tok2)
1787                                 isl_stream_push_token(s, tok2);
1788                         obj.type = isl_obj_int;
1789                         obj.v = isl_int_obj_alloc(s->ctx, tok->u.v);
1790                         isl_token_free(tok);
1791                         return obj;
1792                 }
1793                 isl_stream_push_token(s, tok2);
1794                 isl_stream_push_token(s, tok);
1795                 map = map_read_polylib(s, nparam);
1796                 if (!map)
1797                         goto error;
1798                 if (isl_map_dim(map, isl_dim_in) > 0)
1799                         obj.type = isl_obj_map;
1800                 obj.v = map;
1801                 return obj;
1802         }
1803         v = vars_new(s->ctx);
1804         if (!v) {
1805                 isl_stream_push_token(s, tok);
1806                 goto error;
1807         }
1808         bmap = isl_basic_map_alloc(s->ctx, 0, 0, 0, 0, 0, 0);
1809         if (tok->type == '[') {
1810                 isl_stream_push_token(s, tok);
1811                 bmap = read_tuple(s, bmap, isl_dim_param, v);
1812                 if (!bmap)
1813                         goto error;
1814                 if (nparam >= 0)
1815                         isl_assert(s->ctx, nparam == v->n, goto error);
1816                 tok = isl_stream_next_token(s);
1817                 if (!tok || tok->type != ISL_TOKEN_TO) {
1818                         isl_stream_error(s, tok, "expecting '->'");
1819                         if (tok)
1820                                 isl_stream_push_token(s, tok);
1821                         goto error;
1822                 }
1823                 isl_token_free(tok);
1824                 tok = isl_stream_next_token(s);
1825         } else if (nparam > 0)
1826                 bmap = isl_basic_map_add(bmap, isl_dim_param, nparam);
1827         if (!tok || tok->type != '{') {
1828                 isl_stream_error(s, tok, "expecting '{'");
1829                 if (tok)
1830                         isl_stream_push_token(s, tok);
1831                 goto error;
1832         }
1833         isl_token_free(tok);
1834
1835         tok = isl_stream_next_token(s);
1836         if (!tok)
1837                 ;
1838         else if (tok->type == ISL_TOKEN_IDENT && !strcmp(tok->u.s, "Sym")) {
1839                 isl_token_free(tok);
1840                 if (isl_stream_eat(s, '='))
1841                         goto error;
1842                 bmap = read_tuple(s, bmap, isl_dim_param, v);
1843                 if (!bmap)
1844                         goto error;
1845                 if (nparam >= 0)
1846                         isl_assert(s->ctx, nparam == v->n, goto error);
1847         } else if (tok->type == '}') {
1848                 obj.type = isl_obj_union_set;
1849                 obj.v = isl_union_set_empty(isl_basic_map_get_dim(bmap));
1850                 isl_token_free(tok);
1851                 goto done;
1852         } else
1853                 isl_stream_push_token(s, tok);
1854
1855         for (;;) {
1856                 struct isl_obj o;
1857                 tok = NULL;
1858                 o = obj_read_body(s, isl_basic_map_copy(bmap), v);
1859                 if (o.type == isl_obj_none || !o.v)
1860                         goto error;
1861                 if (!obj.v)
1862                         obj = o;
1863                 else {
1864                         obj = obj_add(s->ctx, obj, o);
1865                         if (obj.type == isl_obj_none || !obj.v)
1866                                 goto error;
1867                 }
1868                 tok = isl_stream_next_token(s);
1869                 if (!tok || tok->type != ';')
1870                         break;
1871                 isl_token_free(tok);
1872         }
1873
1874         if (tok && tok->type == '}') {
1875                 isl_token_free(tok);
1876         } else {
1877                 isl_stream_error(s, tok, "unexpected isl_token");
1878                 if (tok)
1879                         isl_token_free(tok);
1880                 goto error;
1881         }
1882 done:
1883         vars_free(v);
1884         isl_basic_map_free(bmap);
1885
1886         return obj;
1887 error:
1888         isl_basic_map_free(bmap);
1889         obj.type->free(obj.v);
1890         if (v)
1891                 vars_free(v);
1892         obj.v = NULL;
1893         return obj;
1894 }
1895
1896 struct isl_obj isl_stream_read_obj(struct isl_stream *s)
1897 {
1898         return obj_read(s, -1);
1899 }
1900
1901 __isl_give isl_map *isl_stream_read_map(struct isl_stream *s, int nparam)
1902 {
1903         struct isl_obj obj;
1904         struct isl_map *map;
1905
1906         obj = obj_read(s, nparam);
1907         if (obj.v)
1908                 isl_assert(s->ctx, obj.type == isl_obj_map ||
1909                                    obj.type == isl_obj_set, goto error);
1910
1911         return obj.v;
1912 error:
1913         obj.type->free(obj.v);
1914         return NULL;
1915 }
1916
1917 __isl_give isl_set *isl_stream_read_set(struct isl_stream *s, int nparam)
1918 {
1919         struct isl_obj obj;
1920         struct isl_set *set;
1921
1922         obj = obj_read(s, nparam);
1923         if (obj.v)
1924                 isl_assert(s->ctx, obj.type == isl_obj_set, goto error);
1925
1926         return obj.v;
1927 error:
1928         obj.type->free(obj.v);
1929         return NULL;
1930 }
1931
1932 __isl_give isl_union_map *isl_stream_read_union_map(struct isl_stream *s)
1933 {
1934         struct isl_obj obj;
1935         isl_union_map *umap;
1936
1937         obj = obj_read(s, -1);
1938         if (obj.type == isl_obj_map) {
1939                 obj.type = isl_obj_union_map;
1940                 obj.v = isl_union_map_from_map(obj.v);
1941         }
1942         if (obj.type == isl_obj_set) {
1943                 obj.type = isl_obj_union_set;
1944                 obj.v = isl_union_set_from_set(obj.v);
1945         }
1946         if (obj.v)
1947                 isl_assert(s->ctx, obj.type == isl_obj_union_map ||
1948                                    obj.type == isl_obj_union_set, goto error);
1949
1950         return obj.v;
1951 error:
1952         obj.type->free(obj.v);
1953         return NULL;
1954 }
1955
1956 __isl_give isl_union_set *isl_stream_read_union_set(struct isl_stream *s)
1957 {
1958         struct isl_obj obj;
1959         isl_union_set *uset;
1960
1961         obj = obj_read(s, -1);
1962         if (obj.type == isl_obj_set) {
1963                 obj.type = isl_obj_union_set;
1964                 obj.v = isl_union_set_from_set(obj.v);
1965         }
1966         if (obj.v)
1967                 isl_assert(s->ctx, obj.type == isl_obj_union_set, goto error);
1968
1969         return obj.v;
1970 error:
1971         obj.type->free(obj.v);
1972         return NULL;
1973 }
1974
1975 static struct isl_basic_map *basic_map_read(struct isl_stream *s, int nparam)
1976 {
1977         struct isl_obj obj;
1978         struct isl_map *map;
1979         struct isl_basic_map *bmap;
1980
1981         obj = obj_read(s, nparam);
1982         map = obj.v;
1983         if (!map)
1984                 return NULL;
1985
1986         isl_assert(map->ctx, map->n <= 1, goto error);
1987
1988         if (map->n == 0)
1989                 bmap = isl_basic_map_empty_like_map(map);
1990         else
1991                 bmap = isl_basic_map_copy(map->p[0]);
1992
1993         isl_map_free(map);
1994
1995         return bmap;
1996 error:
1997         isl_map_free(map);
1998         return NULL;
1999 }
2000
2001 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
2002                 FILE *input, int nparam)
2003 {
2004         struct isl_basic_map *bmap;
2005         struct isl_stream *s = isl_stream_new_file(ctx, input);
2006         if (!s)
2007                 return NULL;
2008         bmap = basic_map_read(s, nparam);
2009         isl_stream_free(s);
2010         return bmap;
2011 }
2012
2013 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
2014                 FILE *input, int nparam)
2015 {
2016         struct isl_basic_map *bmap;
2017         bmap = isl_basic_map_read_from_file(ctx, input, nparam);
2018         if (!bmap)
2019                 return NULL;
2020         isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
2021         return (struct isl_basic_set *)bmap;
2022 error:
2023         isl_basic_map_free(bmap);
2024         return NULL;
2025 }
2026
2027 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
2028                 const char *str, int nparam)
2029 {
2030         struct isl_basic_map *bmap;
2031         struct isl_stream *s = isl_stream_new_str(ctx, str);
2032         if (!s)
2033                 return NULL;
2034         bmap = basic_map_read(s, nparam);
2035         isl_stream_free(s);
2036         return bmap;
2037 }
2038
2039 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
2040                 const char *str, int nparam)
2041 {
2042         struct isl_basic_map *bmap;
2043         bmap = isl_basic_map_read_from_str(ctx, str, nparam);
2044         if (!bmap)
2045                 return NULL;
2046         isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
2047         return (struct isl_basic_set *)bmap;
2048 error:
2049         isl_basic_map_free(bmap);
2050         return NULL;
2051 }
2052
2053 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
2054                 FILE *input, int nparam)
2055 {
2056         struct isl_map *map;
2057         struct isl_stream *s = isl_stream_new_file(ctx, input);
2058         if (!s)
2059                 return NULL;
2060         map = isl_stream_read_map(s, nparam);
2061         isl_stream_free(s);
2062         return map;
2063 }
2064
2065 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
2066                 const char *str, int nparam)
2067 {
2068         struct isl_map *map;
2069         struct isl_stream *s = isl_stream_new_str(ctx, str);
2070         if (!s)
2071                 return NULL;
2072         map = isl_stream_read_map(s, nparam);
2073         isl_stream_free(s);
2074         return map;
2075 }
2076
2077 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
2078                 FILE *input, int nparam)
2079 {
2080         struct isl_map *map;
2081         map = isl_map_read_from_file(ctx, input, nparam);
2082         if (!map)
2083                 return NULL;
2084         isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
2085         return (struct isl_set *)map;
2086 error:
2087         isl_map_free(map);
2088         return NULL;
2089 }
2090
2091 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
2092                 const char *str, int nparam)
2093 {
2094         struct isl_map *map;
2095         map = isl_map_read_from_str(ctx, str, nparam);
2096         if (!map)
2097                 return NULL;
2098         isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
2099         return (struct isl_set *)map;
2100 error:
2101         isl_map_free(map);
2102         return NULL;
2103 }
2104
2105 __isl_give isl_union_map *isl_union_map_read_from_str(struct isl_ctx *ctx,
2106                 const char *str)
2107 {
2108         isl_union_map *umap;
2109         struct isl_stream *s = isl_stream_new_str(ctx, str);
2110         if (!s)
2111                 return NULL;
2112         umap = isl_stream_read_union_map(s);
2113         isl_stream_free(s);
2114         return umap;
2115 }
2116
2117 __isl_give isl_union_set *isl_union_set_read_from_str(struct isl_ctx *ctx,
2118                 const char *str)
2119 {
2120         isl_union_set *uset;
2121         struct isl_stream *s = isl_stream_new_str(ctx, str);
2122         if (!s)
2123                 return NULL;
2124         uset = isl_stream_read_union_set(s);
2125         isl_stream_free(s);
2126         return uset;
2127 }
2128
2129 static __isl_give isl_vec *isl_vec_read_polylib(struct isl_stream *s)
2130 {
2131         struct isl_vec *vec = NULL;
2132         struct isl_token *tok;
2133         unsigned size;
2134         int j;
2135
2136         tok = isl_stream_next_token(s);
2137         if (!tok || tok->type != ISL_TOKEN_VALUE) {
2138                 isl_stream_error(s, tok, "expecting vector length");
2139                 goto error;
2140         }
2141
2142         size = isl_int_get_si(tok->u.v);
2143         isl_token_free(tok);
2144
2145         vec = isl_vec_alloc(s->ctx, size);
2146
2147         for (j = 0; j < size; ++j) {
2148                 tok = isl_stream_next_token(s);
2149                 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2150                         isl_stream_error(s, tok, "expecting constant value");
2151                         goto error;
2152                 }
2153                 isl_int_set(vec->el[j], tok->u.v);
2154                 isl_token_free(tok);
2155         }
2156
2157         return vec;
2158 error:
2159         isl_token_free(tok);
2160         isl_vec_free(vec);
2161         return NULL;
2162 }
2163
2164 static __isl_give isl_vec *vec_read(struct isl_stream *s,
2165         unsigned input_format)
2166 {
2167         if (input_format == ISL_FORMAT_POLYLIB)
2168                 return isl_vec_read_polylib(s);
2169         isl_assert(s->ctx, 0, return NULL);
2170 }
2171
2172 struct isl_vec *isl_vec_read_from_file(struct isl_ctx *ctx,
2173                 FILE *input, unsigned input_format)
2174 {
2175         isl_vec *v;
2176         struct isl_stream *s = isl_stream_new_file(ctx, input);
2177         if (!s)
2178                 return NULL;
2179         v = vec_read(s, input_format);
2180         isl_stream_free(s);
2181         return v;
2182 }
2183
2184 __isl_give isl_pw_qpolynomial *isl_stream_read_pw_qpolynomial(
2185         struct isl_stream *s)
2186 {
2187         struct isl_obj obj;
2188         struct isl_pw_qpolynomial *pwqp;
2189
2190         obj = obj_read(s, -1);
2191         if (obj.v)
2192                 isl_assert(s->ctx, obj.type == isl_obj_pw_qpolynomial,
2193                            goto error);
2194
2195         return obj.v;
2196 error:
2197         obj.type->free(obj.v);
2198         return NULL;
2199 }
2200
2201 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_str(isl_ctx *ctx,
2202                 const char *str)
2203 {
2204         isl_pw_qpolynomial *pwqp;
2205         struct isl_stream *s = isl_stream_new_str(ctx, str);
2206         if (!s)
2207                 return NULL;
2208         pwqp = isl_stream_read_pw_qpolynomial(s);
2209         isl_stream_free(s);
2210         return pwqp;
2211 }