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isl_token: change type of "type" field from enum isl_token_type to int
[isl.git] / isl_input.c
blobc65faac5528f6468fe49353cda711eb279f4f651
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 <isl_ctx_private.h>
17 #include <isl_map_private.h>
18 #include <isl/set.h>
19 #include <isl/seq.h>
20 #include <isl_stream_private.h>
21 #include <isl/obj.h>
22 #include "isl_polynomial_private.h"
23 #include <isl/union_map.h>
24 #include <isl_mat_private.h>
25 #include <isl_aff_private.h>
26 #include <isl/list.h>
27
28 struct variable {
29 char *name;
30 int pos;
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 free(var->name);
57 free(var);
58 var = next;
59 }
60 }
61
62 static void vars_free(struct vars *v)
63 {
64 if (!v)
65 return;
66 variable_free(v->v);
67 free(v);
68 }
69
70 static void vars_drop(struct vars *v, int n)
71 {
72 struct variable *var;
73
74 if (!v || !v->v)
75 return;
76
77 v->n -= n;
78
79 var = v->v;
80 while (--n >= 0) {
81 struct variable *next = var->next;
82 free(var->name);
83 free(var);
84 var = next;
85 }
86 v->v = var;
87 }
88
89 static struct variable *variable_new(struct vars *v, const char *name, int len,
90 int pos)
91 {
92 struct variable *var;
93 var = isl_calloc_type(v->ctx, struct variable);
94 if (!var)
95 goto error;
96 var->name = strdup(name);
97 var->name[len] = '\0';
98 var->pos = pos;
99 var->next = v->v;
100 return var;
101 error:
102 variable_free(v->v);
103 return NULL;
104 }
105
106 static int vars_pos(struct vars *v, const char *s, int len)
107 {
108 int pos;
109 struct variable *q;
110
111 if (len == -1)
112 len = strlen(s);
113 for (q = v->v; q; q = q->next) {
114 if (strncmp(q->name, s, len) == 0 && q->name[len] == '\0')
115 break;
116 }
117 if (q)
118 pos = q->pos;
119 else {
120 pos = v->n;
121 v->v = variable_new(v, s, len, v->n);
122 if (!v->v)
123 return -1;
124 v->n++;
125 }
126 return pos;
127 }
128
129 static int vars_add_anon(struct vars *v)
130 {
131 v->v = variable_new(v, "", 0, v->n);
132
133 if (!v->v)
134 return -1;
135 v->n++;
136
137 return 0;
138 }
139
140 static __isl_give isl_map *set_name(__isl_take isl_map *map,
141 enum isl_dim_type type, unsigned pos, char *name)
142 {
143 char *prime;
144
145 if (!map)
146 return NULL;
147 if (!name)
148 return map;
149
150 prime = strchr(name, '\'');
151 if (prime)
152 *prime = '\0';
153 map = isl_map_set_dim_name(map, type, pos, name);
154 if (prime)
155 *prime = '\'';
156
157 return map;
158 }
159
160 /* Obtain next token, with some preprocessing.
161 * In particular, evaluate expressions of the form x^y,
162 * with x and y values.
163 */
164 static struct isl_token *next_token(struct isl_stream *s)
165 {
166 struct isl_token *tok, *tok2;
167
168 tok = isl_stream_next_token(s);
169 if (!tok || tok->type != ISL_TOKEN_VALUE)
170 return tok;
171 if (!isl_stream_eat_if_available(s, '^'))
172 return tok;
173 tok2 = isl_stream_next_token(s);
174 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
175 isl_stream_error(s, tok2, "expecting constant value");
176 goto error;
177 }
178
179 isl_int_pow_ui(tok->u.v, tok->u.v, isl_int_get_ui(tok2->u.v));
180
181 isl_token_free(tok2);
182 return tok;
183 error:
184 isl_token_free(tok);
185 isl_token_free(tok2);
186 return NULL;
187 }
188
189 static int accept_cst_factor(struct isl_stream *s, isl_int *f)
190 {
191 struct isl_token *tok;
192
193 tok = next_token(s);
194 if (!tok || tok->type != ISL_TOKEN_VALUE) {
195 isl_stream_error(s, tok, "expecting constant value");
196 goto error;
197 }
198
199 isl_int_mul(*f, *f, tok->u.v);
200
201 isl_token_free(tok);
202
203 if (isl_stream_eat_if_available(s, '*'))
204 return accept_cst_factor(s, f);
205
206 return 0;
207 error:
208 isl_token_free(tok);
209 return -1;
210 }
211
212 /* Given an affine expression aff, return an affine expression
213 * for aff % d, with d the next token on the stream, which is
214 * assumed to be a constant.
215 *
216 * We introduce an integer division q = [aff/d] and the result
217 * is set to aff - d q.
218 */
219 static __isl_give isl_pw_aff *affine_mod(struct isl_stream *s,
220 struct vars *v, __isl_take isl_pw_aff *aff)
221 {
222 struct isl_token *tok;
223 isl_pw_aff *q;
224
225 tok = next_token(s);
226 if (!tok || tok->type != ISL_TOKEN_VALUE) {
227 isl_stream_error(s, tok, "expecting constant value");
228 goto error;
229 }
230
231 q = isl_pw_aff_copy(aff);
232 q = isl_pw_aff_scale_down(q, tok->u.v);
233 q = isl_pw_aff_floor(q);
234 q = isl_pw_aff_scale(q, tok->u.v);
235
236 aff = isl_pw_aff_sub(aff, q);
237
238 isl_token_free(tok);
239 return aff;
240 error:
241 isl_pw_aff_free(aff);
242 isl_token_free(tok);
243 return NULL;
244 }
245
246 static __isl_give isl_pw_aff *accept_affine(struct isl_stream *s,
247 __isl_take isl_space *dim, struct vars *v);
248 static __isl_give isl_pw_aff_list *accept_affine_list(struct isl_stream *s,
249 __isl_take isl_space *dim, struct vars *v);
250
251 static __isl_give isl_pw_aff *accept_minmax(struct isl_stream *s,
252 __isl_take isl_space *dim, struct vars *v)
253 {
254 struct isl_token *tok;
255 isl_pw_aff_list *list = NULL;
256 int min;
257
258 tok = isl_stream_next_token(s);
259 if (!tok)
260 goto error;
261 min = tok->type == ISL_TOKEN_MIN;
262 isl_token_free(tok);
263
264 if (isl_stream_eat(s, '('))
265 goto error;
266
267 list = accept_affine_list(s, isl_space_copy(dim), v);
268 if (!list)
269 goto error;
270
271 if (isl_stream_eat(s, ')'))
272 goto error;
273
274 isl_space_free(dim);
275 return min ? isl_pw_aff_list_min(list) : isl_pw_aff_list_max(list);
276 error:
277 isl_space_free(dim);
278 isl_pw_aff_list_free(list);
279 return NULL;
280 }
281
282 static __isl_give isl_pw_aff *accept_div(struct isl_stream *s,
283 __isl_take isl_space *dim, struct vars *v)
284 {
285 struct isl_token *tok;
286 int seen_paren = 0;
287 int f = 0;
288 int c = 0;
289 isl_pw_aff *pwaff = NULL;
290
291 if (isl_stream_eat_if_available(s, ISL_TOKEN_FLOORD))
292 f = 1;
293 else if (isl_stream_eat_if_available(s, ISL_TOKEN_CEILD))
294 c = 1;
295 if (f || c) {
296 if (isl_stream_eat(s, '('))
297 goto error;
298 } else {
299 if (isl_stream_eat(s, '['))
300 goto error;
301 if (isl_stream_eat_if_available(s, '('))
302 seen_paren = 1;
303 }
304
305 pwaff = accept_affine(s, isl_space_copy(dim), v);
306
307 if (f || c) {
308 if (isl_stream_eat(s, ','))
309 goto error;
310 } else {
311 if (seen_paren && isl_stream_eat(s, ')'))
312 goto error;
313 if (isl_stream_eat(s, '/'))
314 goto error;
315 }
316
317 tok = next_token(s);
318 if (!tok)
319 goto error;
320 if (tok->type != ISL_TOKEN_VALUE) {
321 isl_stream_error(s, tok, "expected denominator");
322 isl_stream_push_token(s, tok);
323 goto error;
324 }
325 isl_pw_aff_scale_down(pwaff, tok->u.v);
326 isl_token_free(tok);
327
328 if (c)
329 pwaff = isl_pw_aff_ceil(pwaff);
330 else
331 pwaff = isl_pw_aff_floor(pwaff);
332
333 if (f || c) {
334 if (isl_stream_eat(s, ')'))
335 goto error;
336 } else {
337 if (isl_stream_eat(s, ']'))
338 goto error;
339 }
340
341 isl_space_free(dim);
342 return pwaff;
343 error:
344 isl_space_free(dim);
345 isl_pw_aff_free(pwaff);
346 return NULL;
347 }
348
349 static __isl_give isl_pw_aff *accept_affine_factor(struct isl_stream *s,
350 __isl_take isl_space *dim, struct vars *v)
351 {
352 struct isl_token *tok = NULL;
353 isl_pw_aff *res = NULL;
354
355 tok = next_token(s);
356 if (!tok) {
357 isl_stream_error(s, NULL, "unexpected EOF");
358 goto error;
359 }
360
361 if (tok->type == ISL_TOKEN_AFF) {
362 res = isl_pw_aff_copy(tok->u.pwaff);
363 isl_token_free(tok);
364 } else if (tok->type == ISL_TOKEN_IDENT) {
365 int n = v->n;
366 int pos = vars_pos(v, tok->u.s, -1);
367 isl_aff *aff;
368
369 if (pos < 0)
370 goto error;
371 if (pos >= n) {
372 isl_stream_error(s, tok, "unknown identifier");
373 goto error;
374 }
375
376 aff = isl_aff_zero_on_domain(isl_local_space_from_space(isl_space_copy(dim)));
377 if (!aff)
378 goto error;
379 isl_int_set_si(aff->v->el[2 + pos], 1);
380 res = isl_pw_aff_from_aff(aff);
381 isl_token_free(tok);
382 } else if (tok->type == ISL_TOKEN_VALUE) {
383 if (isl_stream_eat_if_available(s, '*')) {
384 res = accept_affine_factor(s, isl_space_copy(dim), v);
385 res = isl_pw_aff_scale(res, tok->u.v);
386 } else {
387 isl_local_space *ls;
388 isl_aff *aff;
389 ls = isl_local_space_from_space(isl_space_copy(dim));
390 aff = isl_aff_zero_on_domain(ls);
391 aff = isl_aff_add_constant(aff, tok->u.v);
392 res = isl_pw_aff_from_aff(aff);
393 }
394 isl_token_free(tok);
395 } else if (tok->type == '(') {
396 isl_token_free(tok);
397 tok = NULL;
398 res = accept_affine(s, isl_space_copy(dim), v);
399 if (!res)
400 goto error;
401 if (isl_stream_eat(s, ')'))
402 goto error;
403 } else if (tok->type == '[' ||
404 tok->type == ISL_TOKEN_FLOORD ||
405 tok->type == ISL_TOKEN_CEILD) {
406 isl_stream_push_token(s, tok);
407 tok = NULL;
408 res = accept_div(s, isl_space_copy(dim), v);
409 } else if (tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX) {
410 isl_stream_push_token(s, tok);
411 tok = NULL;
412 res = accept_minmax(s, isl_space_copy(dim), v);
413 } else {
414 isl_stream_error(s, tok, "expecting factor");
415 goto error;
416 }
417 if (isl_stream_eat_if_available(s, '%') ||
418 isl_stream_eat_if_available(s, ISL_TOKEN_MOD)) {
419 isl_space_free(dim);
420 return affine_mod(s, v, res);
421 }
422 if (isl_stream_eat_if_available(s, '*')) {
423 isl_int f;
424 isl_int_init(f);
425 isl_int_set_si(f, 1);
426 if (accept_cst_factor(s, &f) < 0) {
427 isl_int_clear(f);
428 goto error2;
429 }
430 res = isl_pw_aff_scale(res, f);
431 isl_int_clear(f);
432 }
433
434 isl_space_free(dim);
435 return res;
436 error:
437 isl_token_free(tok);
438 error2:
439 isl_pw_aff_free(res);
440 isl_space_free(dim);
441 return NULL;
442 }
443
444 static __isl_give isl_pw_aff *add_cst(__isl_take isl_pw_aff *pwaff, isl_int v)
445 {
446 isl_aff *aff;
447 isl_space *space;
448
449 space = isl_pw_aff_get_domain_space(pwaff);
450 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
451 aff = isl_aff_add_constant(aff, v);
452
453 return isl_pw_aff_add(pwaff, isl_pw_aff_from_aff(aff));
454 }
455
456 static __isl_give isl_pw_aff *accept_affine(struct isl_stream *s,
457 __isl_take isl_space *dim, struct vars *v)
458 {
459 struct isl_token *tok = NULL;
460 isl_local_space *ls;
461 isl_pw_aff *res;
462 int sign = 1;
463
464 ls = isl_local_space_from_space(isl_space_copy(dim));
465 res = isl_pw_aff_from_aff(isl_aff_zero_on_domain(ls));
466 if (!res)
467 goto error;
468
469 for (;;) {
470 tok = next_token(s);
471 if (!tok) {
472 isl_stream_error(s, NULL, "unexpected EOF");
473 goto error;
474 }
475 if (tok->type == '-') {
476 sign = -sign;
477 isl_token_free(tok);
478 continue;
479 }
480 if (tok->type == '(' || tok->type == '[' ||
481 tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX ||
482 tok->type == ISL_TOKEN_FLOORD ||
483 tok->type == ISL_TOKEN_CEILD ||
484 tok->type == ISL_TOKEN_IDENT ||
485 tok->type == ISL_TOKEN_AFF) {
486 isl_pw_aff *term;
487 isl_stream_push_token(s, tok);
488 tok = NULL;
489 term = accept_affine_factor(s, isl_space_copy(dim), v);
490 if (sign < 0)
491 res = isl_pw_aff_sub(res, term);
492 else
493 res = isl_pw_aff_add(res, term);
494 if (!res)
495 goto error;
496 sign = 1;
497 } else if (tok->type == ISL_TOKEN_VALUE) {
498 if (sign < 0)
499 isl_int_neg(tok->u.v, tok->u.v);
500 if (isl_stream_eat_if_available(s, '*') ||
501 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
502 isl_pw_aff *term;
503 term = accept_affine_factor(s,
504 isl_space_copy(dim), v);
505 term = isl_pw_aff_scale(term, tok->u.v);
506 res = isl_pw_aff_add(res, term);
507 if (!res)
508 goto error;
509 } else {
510 res = add_cst(res, tok->u.v);
511 }
512 sign = 1;
513 } else {
514 isl_stream_error(s, tok, "unexpected isl_token");
515 isl_stream_push_token(s, tok);
516 isl_pw_aff_free(res);
517 isl_space_free(dim);
518 return NULL;
519 }
520 isl_token_free(tok);
521
522 tok = next_token(s);
523 if (tok && tok->type == '-') {
524 sign = -sign;
525 isl_token_free(tok);
526 } else if (tok && tok->type == '+') {
527 /* nothing */
528 isl_token_free(tok);
529 } else if (tok && tok->type == ISL_TOKEN_VALUE &&
530 isl_int_is_neg(tok->u.v)) {
531 isl_stream_push_token(s, tok);
532 } else {
533 if (tok)
534 isl_stream_push_token(s, tok);
535 break;
536 }
537 }
538
539 isl_space_free(dim);
540 return res;
541 error:
542 isl_space_free(dim);
543 isl_token_free(tok);
544 isl_pw_aff_free(res);
545 return NULL;
546 }
547
548 static int is_comparator(struct isl_token *tok)
549 {
550 if (!tok)
551 return 0;
552
553 switch (tok->type) {
554 case ISL_TOKEN_LT:
555 case ISL_TOKEN_GT:
556 case ISL_TOKEN_LE:
557 case ISL_TOKEN_GE:
558 case ISL_TOKEN_NE:
559 case '=':
560 return 1;
561 default:
562 return 0;
563 }
564 }
565
566 static struct isl_map *read_disjuncts(struct isl_stream *s,
567 struct vars *v, __isl_take isl_map *map);
568 static __isl_give isl_pw_aff *accept_extended_affine(struct isl_stream *s,
569 __isl_take isl_space *dim, struct vars *v);
570
571 /* Accept a ternary operator, given the first argument.
572 */
573 static __isl_give isl_pw_aff *accept_ternary(struct isl_stream *s,
574 __isl_take isl_map *cond, struct vars *v)
575 {
576 isl_space *dim;
577 isl_pw_aff *pwaff1 = NULL, *pwaff2 = NULL, *pa_cond;
578
579 if (!cond)
580 return NULL;
581
582 if (isl_stream_eat(s, '?'))
583 goto error;
584
585 dim = isl_space_wrap(isl_map_get_space(cond));
586 pwaff1 = accept_extended_affine(s, dim, v);
587 if (!pwaff1)
588 goto error;
589
590 if (isl_stream_eat(s, ':'))
591 goto error;
592
593 dim = isl_pw_aff_get_domain_space(pwaff1);
594 pwaff2 = accept_extended_affine(s, dim, v);
595 if (!pwaff1)
596 goto error;
597
598 pa_cond = isl_set_indicator_function(isl_map_wrap(cond));
599 return isl_pw_aff_cond(pa_cond, pwaff1, pwaff2);
600 error:
601 isl_map_free(cond);
602 isl_pw_aff_free(pwaff1);
603 isl_pw_aff_free(pwaff2);
604 return NULL;
605 }
606
607 /* Accept an affine expression that may involve ternary operators.
608 * We first read an affine expression.
609 * If it is not followed by a comparison operator, we simply return it.
610 * Otherwise, we assume the affine epxression is part of the first
611 * argument of a ternary operator and try to parse that.
612 */
613 static __isl_give isl_pw_aff *accept_extended_affine(struct isl_stream *s,
614 __isl_take isl_space *dim, struct vars *v)
615 {
616 isl_space *space;
617 isl_map *cond;
618 isl_pw_aff *pwaff;
619 struct isl_token *tok;
620 int line = -1, col = -1;
621 int is_comp;
622
623 tok = isl_stream_next_token(s);
624 if (tok) {
625 line = tok->line;
626 col = tok->col;
627 isl_stream_push_token(s, tok);
628 }
629
630 pwaff = accept_affine(s, dim, v);
631 if (!pwaff)
632 return NULL;
633
634 tok = isl_stream_next_token(s);
635 if (!tok)
636 return isl_pw_aff_free(pwaff);
637
638 is_comp = is_comparator(tok);
639 isl_stream_push_token(s, tok);
640 if (!is_comp)
641 return pwaff;
642
643 tok = isl_token_new(s->ctx, line, col, 0);
644 if (!tok)
645 return isl_pw_aff_free(pwaff);
646 tok->type = ISL_TOKEN_AFF;
647 tok->u.pwaff = pwaff;
648
649 space = isl_pw_aff_get_domain_space(pwaff);
650 cond = isl_map_universe(isl_space_unwrap(space));
651
652 isl_stream_push_token(s, tok);
653
654 cond = read_disjuncts(s, v, cond);
655
656 return accept_ternary(s, cond, v);
657 }
658
659 static __isl_give isl_map *read_var_def(struct isl_stream *s,
660 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v)
661 {
662 isl_pw_aff *def;
663 int pos;
664 isl_map *def_map;
665
666 if (type == isl_dim_param)
667 pos = isl_map_dim(map, isl_dim_param);
668 else {
669 pos = isl_map_dim(map, isl_dim_in);
670 if (type == isl_dim_out)
671 pos += isl_map_dim(map, isl_dim_out);
672 type = isl_dim_in;
673 }
674 --pos;
675
676 def = accept_extended_affine(s, isl_space_wrap(isl_map_get_space(map)), v);
677 def_map = isl_map_from_pw_aff(def);
678 def_map = isl_map_equate(def_map, type, pos, isl_dim_out, 0);
679 def_map = isl_set_unwrap(isl_map_domain(def_map));
680
681 map = isl_map_intersect(map, def_map);
682
683 return map;
684 }
685
686 static __isl_give isl_map *read_var_list(struct isl_stream *s,
687 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v)
688 {
689 int i = 0;
690 struct isl_token *tok;
691
692 if (isl_stream_next_token_is(s, ']'))
693 return isl_map_add_dims(map, type, 0);
694
695 while ((tok = next_token(s)) != NULL) {
696 int new_name = 0;
697
698 if (tok->type == ISL_TOKEN_IDENT) {
699 int n = v->n;
700 int p = vars_pos(v, tok->u.s, -1);
701 if (p < 0)
702 goto error;
703 new_name = p >= n;
704 }
705
706 if (new_name) {
707 map = isl_map_add_dims(map, type, 1);
708 map = set_name(map, type, i, v->v->name);
709 isl_token_free(tok);
710 if (isl_stream_eat_if_available(s, '='))
711 map = read_var_def(s, map, type, v);
712 } else {
713 if (type == isl_dim_param) {
714 isl_stream_error(s, tok,
715 "expecting unique identifier");
716 goto error;
717 }
718 isl_stream_push_token(s, tok);
719 tok = NULL;
720 if (vars_add_anon(v) < 0)
721 goto error;
722 map = isl_map_add_dims(map, type, 1);
723 map = read_var_def(s, map, type, v);
724 }
725
726 tok = isl_stream_next_token(s);
727 if (tok && tok->type == ']' &&
728 isl_stream_next_token_is(s, '[')) {
729 isl_token_free(tok);
730 tok = isl_stream_next_token(s);
731 } else if (!tok || tok->type != ',')
732 break;
733
734 isl_token_free(tok);
735 i++;
736 }
737 if (tok)
738 isl_stream_push_token(s, tok);
739
740 return map;
741 error:
742 isl_token_free(tok);
743 isl_map_free(map);
744 return NULL;
745 }
746
747 static __isl_give isl_pw_aff_list *accept_affine_list(struct isl_stream *s,
748 __isl_take isl_space *dim, struct vars *v)
749 {
750 isl_pw_aff *pwaff;
751 isl_pw_aff_list *list;
752 struct isl_token *tok = NULL;
753
754 pwaff = accept_affine(s, isl_space_copy(dim), v);
755 list = isl_pw_aff_list_from_pw_aff(pwaff);
756 if (!list)
757 goto error;
758
759 for (;;) {
760 tok = isl_stream_next_token(s);
761 if (!tok) {
762 isl_stream_error(s, NULL, "unexpected EOF");
763 goto error;
764 }
765 if (tok->type != ',') {
766 isl_stream_push_token(s, tok);
767 break;
768 }
769 isl_token_free(tok);
770
771 pwaff = accept_affine(s, isl_space_copy(dim), v);
772 list = isl_pw_aff_list_concat(list,
773 isl_pw_aff_list_from_pw_aff(pwaff));
774 if (!list)
775 return NULL;
776 }
777
778 isl_space_free(dim);
779 return list;
780 error:
781 isl_space_free(dim);
782 isl_pw_aff_list_free(list);
783 return NULL;
784 }
785
786 static __isl_give isl_map *read_defined_var_list(struct isl_stream *s,
787 struct vars *v, __isl_take isl_map *map)
788 {
789 struct isl_token *tok;
790
791 while ((tok = isl_stream_next_token(s)) != NULL) {
792 int p;
793 int n = v->n;
794
795 if (tok->type != ISL_TOKEN_IDENT)
796 break;
797
798 p = vars_pos(v, tok->u.s, -1);
799 if (p < 0)
800 goto error;
801 if (p < n) {
802 isl_stream_error(s, tok, "expecting unique identifier");
803 goto error;
804 }
805
806 map = isl_map_add_dims(map, isl_dim_out, 1);
807
808 isl_token_free(tok);
809 tok = isl_stream_next_token(s);
810 if (tok && tok->type == '=') {
811 isl_token_free(tok);
812 map = read_var_def(s, map, isl_dim_out, v);
813 tok = isl_stream_next_token(s);
814 }
815
816 if (!tok || tok->type != ',')
817 break;
818
819 isl_token_free(tok);
820 }
821 if (tok)
822 isl_stream_push_token(s, tok);
823
824 return map;
825 error:
826 isl_token_free(tok);
827 isl_map_free(map);
828 return NULL;
829 }
830
831 static int next_is_tuple(struct isl_stream *s)
832 {
833 struct isl_token *tok;
834 int is_tuple;
835
836 tok = isl_stream_next_token(s);
837 if (!tok)
838 return 0;
839 if (tok->type == '[') {
840 isl_stream_push_token(s, tok);
841 return 1;
842 }
843 if (tok->type != ISL_TOKEN_IDENT && !tok->is_keyword) {
844 isl_stream_push_token(s, tok);
845 return 0;
846 }
847
848 is_tuple = isl_stream_next_token_is(s, '[');
849
850 isl_stream_push_token(s, tok);
851
852 return is_tuple;
853 }
854
855 static __isl_give isl_map *read_tuple(struct isl_stream *s,
856 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v);
857
858 static __isl_give isl_set *read_nested_tuple(struct isl_stream *s,
859 __isl_take isl_map *map, struct vars *v)
860 {
861 map = read_tuple(s, map, isl_dim_in, v);
862 if (isl_stream_eat(s, ISL_TOKEN_TO))
863 goto error;
864 map = read_tuple(s, map, isl_dim_out, v);
865 return isl_map_wrap(map);
866 error:
867 isl_map_free(map);
868 return NULL;
869 }
870
871 static __isl_give isl_map *read_tuple(struct isl_stream *s,
872 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v)
873 {
874 struct isl_token *tok;
875 char *name = NULL;
876
877 tok = isl_stream_next_token(s);
878 if (tok && (tok->type == ISL_TOKEN_IDENT || tok->is_keyword)) {
879 name = strdup(tok->u.s);
880 if (!name)
881 goto error;
882 isl_token_free(tok);
883 tok = isl_stream_next_token(s);
884 }
885 if (!tok || tok->type != '[') {
886 isl_stream_error(s, tok, "expecting '['");
887 goto error;
888 }
889 isl_token_free(tok);
890 if (type != isl_dim_param && next_is_tuple(s)) {
891 isl_space *dim = isl_map_get_space(map);
892 int nparam = isl_space_dim(dim, isl_dim_param);
893 int n_in = isl_space_dim(dim, isl_dim_in);
894 isl_set *nested;
895 if (type == isl_dim_out) {
896 dim = isl_space_move_dims(dim, isl_dim_param, nparam,
897 isl_dim_in, 0, n_in);
898 dim = isl_space_params(dim);
899 }
900 nested = read_nested_tuple(s, isl_map_universe(dim), v);
901 if (type == isl_dim_in) {
902 nested = isl_map_reverse(nested);
903 map = isl_map_intersect_params(nested, map);
904 } else {
905 isl_set *set;
906 dim = isl_set_get_space(nested);
907 dim = isl_space_drop_dims(dim, isl_dim_param, nparam, n_in);
908 dim = isl_space_join(isl_map_get_space(map), dim);
909 set = isl_map_domain(map);
910 nested = isl_map_reset_space(nested, dim);
911 map = isl_map_intersect_domain(nested, set);
912 }
913 } else
914 map = read_var_list(s, map, type, v);
915 tok = isl_stream_next_token(s);
916 if (!tok || tok->type != ']') {
917 isl_stream_error(s, tok, "expecting ']'");
918 goto error;
919 }
920 isl_token_free(tok);
921
922 if (name) {
923 map = isl_map_set_tuple_name(map, type, name);
924 free(name);
925 }
926
927 return map;
928 error:
929 if (tok)
930 isl_token_free(tok);
931 isl_map_free(map);
932 return NULL;
933 }
934
935 static __isl_give isl_set *construct_constraints(
936 __isl_take isl_set *set, enum isl_token_type type,
937 __isl_keep isl_pw_aff_list *left, __isl_keep isl_pw_aff_list *right)
938 {
939 isl_set *cond;
940
941 if (type == ISL_TOKEN_LE)
942 cond = isl_pw_aff_list_le_set(isl_pw_aff_list_copy(left),
943 isl_pw_aff_list_copy(right));
944 else if (type == ISL_TOKEN_GE)
945 cond = isl_pw_aff_list_ge_set(isl_pw_aff_list_copy(left),
946 isl_pw_aff_list_copy(right));
947 else if (type == ISL_TOKEN_LT)
948 cond = isl_pw_aff_list_lt_set(isl_pw_aff_list_copy(left),
949 isl_pw_aff_list_copy(right));
950 else if (type == ISL_TOKEN_GT)
951 cond = isl_pw_aff_list_gt_set(isl_pw_aff_list_copy(left),
952 isl_pw_aff_list_copy(right));
953 else if (type == ISL_TOKEN_NE)
954 cond = isl_pw_aff_list_ne_set(isl_pw_aff_list_copy(left),
955 isl_pw_aff_list_copy(right));
956 else
957 cond = isl_pw_aff_list_eq_set(isl_pw_aff_list_copy(left),
958 isl_pw_aff_list_copy(right));
959
960 return isl_set_intersect(set, cond);
961 }
962
963 static __isl_give isl_map *add_constraint(struct isl_stream *s,
964 struct vars *v, __isl_take isl_map *map)
965 {
966 struct isl_token *tok = NULL;
967 isl_pw_aff_list *list1 = NULL, *list2 = NULL;
968 isl_set *set;
969
970 set = isl_map_wrap(map);
971 list1 = accept_affine_list(s, isl_set_get_space(set), v);
972 if (!list1)
973 goto error;
974 tok = isl_stream_next_token(s);
975 if (!is_comparator(tok)) {
976 isl_stream_error(s, tok, "missing operator");
977 if (tok)
978 isl_stream_push_token(s, tok);
979 tok = NULL;
980 goto error;
981 }
982 for (;;) {
983 list2 = accept_affine_list(s, isl_set_get_space(set), v);
984 if (!list2)
985 goto error;
986
987 set = construct_constraints(set, tok->type, list1, list2);
988 isl_token_free(tok);
989 isl_pw_aff_list_free(list1);
990 list1 = list2;
991
992 tok = isl_stream_next_token(s);
993 if (!is_comparator(tok)) {
994 if (tok)
995 isl_stream_push_token(s, tok);
996 break;
997 }
998 }
999 isl_pw_aff_list_free(list1);
1000
1001 return isl_set_unwrap(set);
1002 error:
1003 if (tok)
1004 isl_token_free(tok);
1005 isl_pw_aff_list_free(list1);
1006 isl_pw_aff_list_free(list2);
1007 isl_set_free(set);
1008 return NULL;
1009 }
1010
1011 static __isl_give isl_map *read_exists(struct isl_stream *s,
1012 struct vars *v, __isl_take isl_map *map)
1013 {
1014 int n = v->n;
1015 int seen_paren = isl_stream_eat_if_available(s, '(');
1016
1017 map = isl_map_from_domain(isl_map_wrap(map));
1018 map = read_defined_var_list(s, v, map);
1019
1020 if (isl_stream_eat(s, ':'))
1021 goto error;
1022
1023 map = read_disjuncts(s, v, map);
1024 map = isl_set_unwrap(isl_map_domain(map));
1025
1026 vars_drop(v, v->n - n);
1027 if (seen_paren && isl_stream_eat(s, ')'))
1028 goto error;
1029
1030 return map;
1031 error:
1032 isl_map_free(map);
1033 return NULL;
1034 }
1035
1036 /* Parse an expression between parentheses and push the result
1037 * back on the stream.
1038 *
1039 * The parsed expression may be either an affine expression
1040 * or a condition. The first type is pushed onto the stream
1041 * as an isl_pw_aff, while the second is pushed as an isl_map.
1042 *
1043 * If the initial token indicates the start of a condition,
1044 * we parse it as such.
1045 * Otherwise, we first parse an affine expression and push
1046 * that onto the stream. If the affine expression covers the
1047 * entire expression between parentheses, we return.
1048 * Otherwise, we assume that the affine expression is the
1049 * start of a condition and continue parsing.
1050 */
1051 static int resolve_paren_expr(struct isl_stream *s,
1052 struct vars *v, __isl_take isl_map *map)
1053 {
1054 struct isl_token *tok, *tok2;
1055 int line, col;
1056 isl_pw_aff *pwaff;
1057
1058 tok = isl_stream_next_token(s);
1059 if (!tok || tok->type != '(')
1060 goto error;
1061
1062 if (isl_stream_next_token_is(s, '('))
1063 if (resolve_paren_expr(s, v, isl_map_copy(map)))
1064 goto error;
1065
1066 if (isl_stream_next_token_is(s, ISL_TOKEN_EXISTS) ||
1067 isl_stream_next_token_is(s, ISL_TOKEN_TRUE) ||
1068 isl_stream_next_token_is(s, ISL_TOKEN_FALSE) ||
1069 isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1070 map = read_disjuncts(s, v, map);
1071 if (isl_stream_eat(s, ')'))
1072 goto error;
1073 tok->type = ISL_TOKEN_MAP;
1074 tok->u.map = map;
1075 isl_stream_push_token(s, tok);
1076 return 0;
1077 }
1078
1079 tok2 = isl_stream_next_token(s);
1080 if (!tok2)
1081 goto error;
1082 line = tok2->line;
1083 col = tok2->col;
1084 isl_stream_push_token(s, tok2);
1085
1086 pwaff = accept_affine(s, isl_space_wrap(isl_map_get_space(map)), v);
1087 if (!pwaff)
1088 goto error;
1089
1090 tok2 = isl_token_new(s->ctx, line, col, 0);
1091 if (!tok2)
1092 goto error2;
1093 tok2->type = ISL_TOKEN_AFF;
1094 tok2->u.pwaff = pwaff;
1095
1096 if (isl_stream_eat_if_available(s, ')')) {
1097 isl_stream_push_token(s, tok2);
1098 isl_token_free(tok);
1099 isl_map_free(map);
1100 return 0;
1101 }
1102
1103 isl_stream_push_token(s, tok2);
1104
1105 map = read_disjuncts(s, v, map);
1106 if (isl_stream_eat(s, ')'))
1107 goto error;
1108
1109 tok->type = ISL_TOKEN_MAP;
1110 tok->u.map = map;
1111 isl_stream_push_token(s, tok);
1112
1113 return 0;
1114 error2:
1115 isl_pw_aff_free(pwaff);
1116 error:
1117 isl_token_free(tok);
1118 isl_map_free(map);
1119 return -1;
1120 }
1121
1122 static __isl_give isl_map *read_conjunct(struct isl_stream *s,
1123 struct vars *v, __isl_take isl_map *map)
1124 {
1125 if (isl_stream_next_token_is(s, '('))
1126 if (resolve_paren_expr(s, v, isl_map_copy(map)))
1127 goto error;
1128
1129 if (isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1130 struct isl_token *tok;
1131 tok = isl_stream_next_token(s);
1132 if (!tok)
1133 goto error;
1134 isl_map_free(map);
1135 map = isl_map_copy(tok->u.map);
1136 isl_token_free(tok);
1137 return map;
1138 }
1139
1140 if (isl_stream_eat_if_available(s, ISL_TOKEN_EXISTS))
1141 return read_exists(s, v, map);
1142
1143 if (isl_stream_eat_if_available(s, ISL_TOKEN_TRUE))
1144 return map;
1145
1146 if (isl_stream_eat_if_available(s, ISL_TOKEN_FALSE)) {
1147 isl_space *dim = isl_map_get_space(map);
1148 isl_map_free(map);
1149 return isl_map_empty(dim);
1150 }
1151
1152 return add_constraint(s, v, map);
1153 error:
1154 isl_map_free(map);
1155 return NULL;
1156 }
1157
1158 static __isl_give isl_map *read_conjuncts(struct isl_stream *s,
1159 struct vars *v, __isl_take isl_map *map)
1160 {
1161 isl_map *res;
1162 int negate;
1163
1164 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1165 res = read_conjunct(s, v, isl_map_copy(map));
1166 if (negate)
1167 res = isl_map_subtract(isl_map_copy(map), res);
1168
1169 while (isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
1170 isl_map *res_i;
1171
1172 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1173 res_i = read_conjunct(s, v, isl_map_copy(map));
1174 if (negate)
1175 res = isl_map_subtract(res, res_i);
1176 else
1177 res = isl_map_intersect(res, res_i);
1178 }
1179
1180 isl_map_free(map);
1181 return res;
1182 }
1183
1184 static struct isl_map *read_disjuncts(struct isl_stream *s,
1185 struct vars *v, __isl_take isl_map *map)
1186 {
1187 isl_map *res;
1188
1189 if (isl_stream_next_token_is(s, '}')) {
1190 isl_space *dim = isl_map_get_space(map);
1191 isl_map_free(map);
1192 return isl_map_universe(dim);
1193 }
1194
1195 res = read_conjuncts(s, v, isl_map_copy(map));
1196 while (isl_stream_eat_if_available(s, ISL_TOKEN_OR)) {
1197 isl_map *res_i;
1198
1199 res_i = read_conjuncts(s, v, isl_map_copy(map));
1200 res = isl_map_union(res, res_i);
1201 }
1202
1203 isl_map_free(map);
1204 return res;
1205 }
1206
1207 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
1208 {
1209 if (pos < isl_basic_map_dim(bmap, isl_dim_out))
1210 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1211 isl_basic_map_dim(bmap, isl_dim_in) + pos;
1212 pos -= isl_basic_map_dim(bmap, isl_dim_out);
1213
1214 if (pos < isl_basic_map_dim(bmap, isl_dim_in))
1215 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
1216 pos -= isl_basic_map_dim(bmap, isl_dim_in);
1217
1218 if (pos < isl_basic_map_dim(bmap, isl_dim_div))
1219 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1220 isl_basic_map_dim(bmap, isl_dim_in) +
1221 isl_basic_map_dim(bmap, isl_dim_out) + pos;
1222 pos -= isl_basic_map_dim(bmap, isl_dim_div);
1223
1224 if (pos < isl_basic_map_dim(bmap, isl_dim_param))
1225 return 1 + pos;
1226
1227 return 0;
1228 }
1229
1230 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
1231 struct isl_stream *s, __isl_take isl_basic_map *bmap)
1232 {
1233 int j;
1234 struct isl_token *tok;
1235 int type;
1236 int k;
1237 isl_int *c;
1238 unsigned nparam;
1239 unsigned dim;
1240
1241 if (!bmap)
1242 return NULL;
1243
1244 nparam = isl_basic_map_dim(bmap, isl_dim_param);
1245 dim = isl_basic_map_dim(bmap, isl_dim_out);
1246
1247 tok = isl_stream_next_token(s);
1248 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1249 isl_stream_error(s, tok, "expecting coefficient");
1250 if (tok)
1251 isl_stream_push_token(s, tok);
1252 goto error;
1253 }
1254 if (!tok->on_new_line) {
1255 isl_stream_error(s, tok, "coefficient should appear on new line");
1256 isl_stream_push_token(s, tok);
1257 goto error;
1258 }
1259
1260 type = isl_int_get_si(tok->u.v);
1261 isl_token_free(tok);
1262
1263 isl_assert(s->ctx, type == 0 || type == 1, goto error);
1264 if (type == 0) {
1265 k = isl_basic_map_alloc_equality(bmap);
1266 c = bmap->eq[k];
1267 } else {
1268 k = isl_basic_map_alloc_inequality(bmap);
1269 c = bmap->ineq[k];
1270 }
1271 if (k < 0)
1272 goto error;
1273
1274 for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
1275 int pos;
1276 tok = isl_stream_next_token(s);
1277 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1278 isl_stream_error(s, tok, "expecting coefficient");
1279 if (tok)
1280 isl_stream_push_token(s, tok);
1281 goto error;
1282 }
1283 if (tok->on_new_line) {
1284 isl_stream_error(s, tok,
1285 "coefficient should not appear on new line");
1286 isl_stream_push_token(s, tok);
1287 goto error;
1288 }
1289 pos = polylib_pos_to_isl_pos(bmap, j);
1290 isl_int_set(c[pos], tok->u.v);
1291 isl_token_free(tok);
1292 }
1293
1294 return bmap;
1295 error:
1296 isl_basic_map_free(bmap);
1297 return NULL;
1298 }
1299
1300 static __isl_give isl_basic_map *basic_map_read_polylib(struct isl_stream *s)
1301 {
1302 int i;
1303 struct isl_token *tok;
1304 struct isl_token *tok2;
1305 int n_row, n_col;
1306 int on_new_line;
1307 unsigned in = 0, out, local = 0;
1308 struct isl_basic_map *bmap = NULL;
1309 int nparam = 0;
1310
1311 tok = isl_stream_next_token(s);
1312 if (!tok) {
1313 isl_stream_error(s, NULL, "unexpected EOF");
1314 return NULL;
1315 }
1316 tok2 = isl_stream_next_token(s);
1317 if (!tok2) {
1318 isl_token_free(tok);
1319 isl_stream_error(s, NULL, "unexpected EOF");
1320 return NULL;
1321 }
1322 if (tok->type != ISL_TOKEN_VALUE || tok2->type != ISL_TOKEN_VALUE) {
1323 isl_stream_push_token(s, tok2);
1324 isl_stream_push_token(s, tok);
1325 isl_stream_error(s, NULL,
1326 "expecting constraint matrix dimensions");
1327 return NULL;
1328 }
1329 n_row = isl_int_get_si(tok->u.v);
1330 n_col = isl_int_get_si(tok2->u.v);
1331 on_new_line = tok2->on_new_line;
1332 isl_token_free(tok2);
1333 isl_token_free(tok);
1334 isl_assert(s->ctx, !on_new_line, return NULL);
1335 isl_assert(s->ctx, n_row >= 0, return NULL);
1336 isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
1337 tok = isl_stream_next_token_on_same_line(s);
1338 if (tok) {
1339 if (tok->type != ISL_TOKEN_VALUE) {
1340 isl_stream_error(s, tok,
1341 "expecting number of output dimensions");
1342 isl_stream_push_token(s, tok);
1343 goto error;
1344 }
1345 out = isl_int_get_si(tok->u.v);
1346 isl_token_free(tok);
1347
1348 tok = isl_stream_next_token_on_same_line(s);
1349 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1350 isl_stream_error(s, tok,
1351 "expecting number of input dimensions");
1352 if (tok)
1353 isl_stream_push_token(s, tok);
1354 goto error;
1355 }
1356 in = isl_int_get_si(tok->u.v);
1357 isl_token_free(tok);
1358
1359 tok = isl_stream_next_token_on_same_line(s);
1360 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1361 isl_stream_error(s, tok,
1362 "expecting number of existentials");
1363 if (tok)
1364 isl_stream_push_token(s, tok);
1365 goto error;
1366 }
1367 local = isl_int_get_si(tok->u.v);
1368 isl_token_free(tok);
1369
1370 tok = isl_stream_next_token_on_same_line(s);
1371 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1372 isl_stream_error(s, tok,
1373 "expecting number of parameters");
1374 if (tok)
1375 isl_stream_push_token(s, tok);
1376 goto error;
1377 }
1378 nparam = isl_int_get_si(tok->u.v);
1379 isl_token_free(tok);
1380 if (n_col != 1 + out + in + local + nparam + 1) {
1381 isl_stream_error(s, NULL,
1382 "dimensions don't match");
1383 goto error;
1384 }
1385 } else
1386 out = n_col - 2 - nparam;
1387 bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
1388 if (!bmap)
1389 return NULL;
1390
1391 for (i = 0; i < local; ++i) {
1392 int k = isl_basic_map_alloc_div(bmap);
1393 if (k < 0)
1394 goto error;
1395 isl_seq_clr(bmap->div[k], 1 + 1 + nparam + in + out + local);
1396 }
1397
1398 for (i = 0; i < n_row; ++i)
1399 bmap = basic_map_read_polylib_constraint(s, bmap);
1400
1401 tok = isl_stream_next_token_on_same_line(s);
1402 if (tok) {
1403 isl_stream_error(s, tok, "unexpected extra token on line");
1404 isl_stream_push_token(s, tok);
1405 goto error;
1406 }
1407
1408 bmap = isl_basic_map_simplify(bmap);
1409 bmap = isl_basic_map_finalize(bmap);
1410 return bmap;
1411 error:
1412 isl_basic_map_free(bmap);
1413 return NULL;
1414 }
1415
1416 static struct isl_map *map_read_polylib(struct isl_stream *s)
1417 {
1418 struct isl_token *tok;
1419 struct isl_token *tok2;
1420 int i, n;
1421 struct isl_map *map;
1422
1423 tok = isl_stream_next_token(s);
1424 if (!tok) {
1425 isl_stream_error(s, NULL, "unexpected EOF");
1426 return NULL;
1427 }
1428 tok2 = isl_stream_next_token_on_same_line(s);
1429 if (tok2 && tok2->type == ISL_TOKEN_VALUE) {
1430 isl_stream_push_token(s, tok2);
1431 isl_stream_push_token(s, tok);
1432 return isl_map_from_basic_map(basic_map_read_polylib(s));
1433 }
1434 if (tok2) {
1435 isl_stream_error(s, tok2, "unexpected token");
1436 isl_stream_push_token(s, tok2);
1437 isl_stream_push_token(s, tok);
1438 return NULL;
1439 }
1440 n = isl_int_get_si(tok->u.v);
1441 isl_token_free(tok);
1442
1443 isl_assert(s->ctx, n >= 1, return NULL);
1444
1445 map = isl_map_from_basic_map(basic_map_read_polylib(s));
1446
1447 for (i = 1; map && i < n; ++i)
1448 map = isl_map_union(map,
1449 isl_map_from_basic_map(basic_map_read_polylib(s)));
1450
1451 return map;
1452 }
1453
1454 static int optional_power(struct isl_stream *s)
1455 {
1456 int pow;
1457 struct isl_token *tok;
1458
1459 tok = isl_stream_next_token(s);
1460 if (!tok)
1461 return 1;
1462 if (tok->type != '^') {
1463 isl_stream_push_token(s, tok);
1464 return 1;
1465 }
1466 isl_token_free(tok);
1467 tok = isl_stream_next_token(s);
1468 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1469 isl_stream_error(s, tok, "expecting exponent");
1470 if (tok)
1471 isl_stream_push_token(s, tok);
1472 return 1;
1473 }
1474 pow = isl_int_get_si(tok->u.v);
1475 isl_token_free(tok);
1476 return pow;
1477 }
1478
1479 static __isl_give isl_pw_qpolynomial *read_term(struct isl_stream *s,
1480 __isl_keep isl_map *map, struct vars *v);
1481
1482 static __isl_give isl_pw_qpolynomial *read_factor(struct isl_stream *s,
1483 __isl_keep isl_map *map, struct vars *v)
1484 {
1485 isl_pw_qpolynomial *pwqp;
1486 struct isl_token *tok;
1487
1488 tok = next_token(s);
1489 if (!tok) {
1490 isl_stream_error(s, NULL, "unexpected EOF");
1491 return NULL;
1492 }
1493 if (tok->type == '(') {
1494 int pow;
1495
1496 isl_token_free(tok);
1497 pwqp = read_term(s, map, v);
1498 if (!pwqp)
1499 return NULL;
1500 if (isl_stream_eat(s, ')'))
1501 goto error;
1502 pow = optional_power(s);
1503 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
1504 } else if (tok->type == ISL_TOKEN_VALUE) {
1505 struct isl_token *tok2;
1506 tok2 = isl_stream_next_token(s);
1507 isl_qpolynomial *qp;
1508 if (tok2 && tok2->type == '/') {
1509 isl_token_free(tok2);
1510 tok2 = next_token(s);
1511 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
1512 isl_stream_error(s, tok2, "expected denominator");
1513 isl_token_free(tok);
1514 isl_token_free(tok2);
1515 return NULL;
1516 }
1517 qp = isl_qpolynomial_rat_cst_on_domain(isl_map_get_space(map),
1518 tok->u.v, tok2->u.v);
1519 isl_token_free(tok2);
1520 } else {
1521 isl_stream_push_token(s, tok2);
1522 qp = isl_qpolynomial_cst_on_domain(isl_map_get_space(map),
1523 tok->u.v);
1524 }
1525 isl_token_free(tok);
1526 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1527 } else if (tok->type == ISL_TOKEN_INFTY) {
1528 isl_qpolynomial *qp;
1529 isl_token_free(tok);
1530 qp = isl_qpolynomial_infty_on_domain(isl_map_get_space(map));
1531 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1532 } else if (tok->type == ISL_TOKEN_NAN) {
1533 isl_qpolynomial *qp;
1534 isl_token_free(tok);
1535 qp = isl_qpolynomial_nan_on_domain(isl_map_get_space(map));
1536 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1537 } else if (tok->type == ISL_TOKEN_IDENT) {
1538 int n = v->n;
1539 int pos = vars_pos(v, tok->u.s, -1);
1540 int pow;
1541 isl_qpolynomial *qp;
1542 if (pos < 0) {
1543 isl_token_free(tok);
1544 return NULL;
1545 }
1546 if (pos >= n) {
1547 vars_drop(v, v->n - n);
1548 isl_stream_error(s, tok, "unknown identifier");
1549 isl_token_free(tok);
1550 return NULL;
1551 }
1552 isl_token_free(tok);
1553 pow = optional_power(s);
1554 qp = isl_qpolynomial_var_pow_on_domain(isl_map_get_space(map), pos, pow);
1555 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1556 } else if (tok->type == '[') {
1557 isl_pw_aff *pwaff;
1558 int pow;
1559
1560 isl_stream_push_token(s, tok);
1561 pwaff = accept_div(s, isl_map_get_space(map), v);
1562 pow = optional_power(s);
1563 pwqp = isl_pw_qpolynomial_from_pw_aff(pwaff);
1564 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
1565 } else if (tok->type == '-') {
1566 isl_token_free(tok);
1567 pwqp = read_factor(s, map, v);
1568 pwqp = isl_pw_qpolynomial_neg(pwqp);
1569 } else {
1570 isl_stream_error(s, tok, "unexpected isl_token");
1571 isl_stream_push_token(s, tok);
1572 return NULL;
1573 }
1574
1575 if (isl_stream_eat_if_available(s, '*') ||
1576 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
1577 isl_pw_qpolynomial *pwqp2;
1578
1579 pwqp2 = read_factor(s, map, v);
1580 pwqp = isl_pw_qpolynomial_mul(pwqp, pwqp2);
1581 }
1582
1583 return pwqp;
1584 error:
1585 isl_pw_qpolynomial_free(pwqp);
1586 return NULL;
1587 }
1588
1589 static __isl_give isl_pw_qpolynomial *read_term(struct isl_stream *s,
1590 __isl_keep isl_map *map, struct vars *v)
1591 {
1592 struct isl_token *tok;
1593 isl_pw_qpolynomial *pwqp;
1594
1595 pwqp = read_factor(s, map, v);
1596
1597 for (;;) {
1598 tok = next_token(s);
1599 if (!tok)
1600 return pwqp;
1601
1602 if (tok->type == '+') {
1603 isl_pw_qpolynomial *pwqp2;
1604
1605 isl_token_free(tok);
1606 pwqp2 = read_factor(s, map, v);
1607 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
1608 } else if (tok->type == '-') {
1609 isl_pw_qpolynomial *pwqp2;
1610
1611 isl_token_free(tok);
1612 pwqp2 = read_factor(s, map, v);
1613 pwqp = isl_pw_qpolynomial_sub(pwqp, pwqp2);
1614 } else if (tok->type == ISL_TOKEN_VALUE &&
1615 isl_int_is_neg(tok->u.v)) {
1616 isl_pw_qpolynomial *pwqp2;
1617
1618 isl_stream_push_token(s, tok);
1619 pwqp2 = read_factor(s, map, v);
1620 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
1621 } else {
1622 isl_stream_push_token(s, tok);
1623 break;
1624 }
1625 }
1626
1627 return pwqp;
1628 }
1629
1630 static __isl_give isl_map *read_optional_disjuncts(struct isl_stream *s,
1631 __isl_take isl_map *map, struct vars *v)
1632 {
1633 struct isl_token *tok;
1634
1635 tok = isl_stream_next_token(s);
1636 if (!tok) {
1637 isl_stream_error(s, NULL, "unexpected EOF");
1638 goto error;
1639 }
1640 if (tok->type == ':' ||
1641 (tok->type == ISL_TOKEN_OR && !strcmp(tok->u.s, "|"))) {
1642 isl_token_free(tok);
1643 map = read_disjuncts(s, v, map);
1644 } else
1645 isl_stream_push_token(s, tok);
1646
1647 return map;
1648 error:
1649 isl_map_free(map);
1650 return NULL;
1651 }
1652
1653 static struct isl_obj obj_read_poly(struct isl_stream *s,
1654 __isl_take isl_map *map, struct vars *v, int n)
1655 {
1656 struct isl_obj obj = { isl_obj_pw_qpolynomial, NULL };
1657 isl_pw_qpolynomial *pwqp;
1658 struct isl_set *set;
1659
1660 pwqp = read_term(s, map, v);
1661 map = read_optional_disjuncts(s, map, v);
1662 set = isl_map_range(map);
1663
1664 pwqp = isl_pw_qpolynomial_intersect_domain(pwqp, set);
1665
1666 vars_drop(v, v->n - n);
1667
1668 obj.v = pwqp;
1669 return obj;
1670 }
1671
1672 static struct isl_obj obj_read_poly_or_fold(struct isl_stream *s,
1673 __isl_take isl_set *set, struct vars *v, int n)
1674 {
1675 struct isl_obj obj = { isl_obj_pw_qpolynomial_fold, NULL };
1676 isl_pw_qpolynomial *pwqp;
1677 isl_pw_qpolynomial_fold *pwf = NULL;
1678
1679 if (!isl_stream_eat_if_available(s, ISL_TOKEN_MAX))
1680 return obj_read_poly(s, set, v, n);
1681
1682 if (isl_stream_eat(s, '('))
1683 goto error;
1684
1685 pwqp = read_term(s, set, v);
1686 pwf = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max, pwqp);
1687
1688 while (isl_stream_eat_if_available(s, ',')) {
1689 isl_pw_qpolynomial_fold *pwf_i;
1690 pwqp = read_term(s, set, v);
1691 pwf_i = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max,
1692 pwqp);
1693 pwf = isl_pw_qpolynomial_fold_fold(pwf, pwf_i);
1694 }
1695
1696 if (isl_stream_eat(s, ')'))
1697 goto error;
1698
1699 set = read_optional_disjuncts(s, set, v);
1700 pwf = isl_pw_qpolynomial_fold_intersect_domain(pwf, set);
1701
1702 vars_drop(v, v->n - n);
1703
1704 obj.v = pwf;
1705 return obj;
1706 error:
1707 isl_set_free(set);
1708 isl_pw_qpolynomial_fold_free(pwf);
1709 obj.type = isl_obj_none;
1710 return obj;
1711 }
1712
1713 static int is_rational(struct isl_stream *s)
1714 {
1715 struct isl_token *tok;
1716
1717 tok = isl_stream_next_token(s);
1718 if (!tok)
1719 return 0;
1720 if (tok->type == ISL_TOKEN_RAT && isl_stream_next_token_is(s, ':')) {
1721 isl_token_free(tok);
1722 isl_stream_eat(s, ':');
1723 return 1;
1724 }
1725
1726 isl_stream_push_token(s, tok);
1727
1728 return 0;
1729 }
1730
1731 static struct isl_obj obj_read_body(struct isl_stream *s,
1732 __isl_take isl_map *map, struct vars *v)
1733 {
1734 struct isl_token *tok;
1735 struct isl_obj obj = { isl_obj_set, NULL };
1736 int n = v->n;
1737
1738 if (is_rational(s))
1739 map = isl_map_set_rational(map);
1740
1741 if (isl_stream_next_token_is(s, ':')) {
1742 obj.type = isl_obj_set;
1743 obj.v = read_optional_disjuncts(s, map, v);
1744 return obj;
1745 }
1746
1747 if (!next_is_tuple(s))
1748 return obj_read_poly_or_fold(s, map, v, n);
1749
1750 map = read_tuple(s, map, isl_dim_in, v);
1751 if (!map)
1752 goto error;
1753 tok = isl_stream_next_token(s);
1754 if (tok && tok->type == ISL_TOKEN_TO) {
1755 obj.type = isl_obj_map;
1756 isl_token_free(tok);
1757 if (!next_is_tuple(s)) {
1758 isl_set *set = isl_map_domain(map);
1759 return obj_read_poly_or_fold(s, set, v, n);
1760 }
1761 map = read_tuple(s, map, isl_dim_out, v);
1762 if (!map)
1763 goto error;
1764 } else {
1765 map = isl_map_reverse(map);
1766 if (tok)
1767 isl_stream_push_token(s, tok);
1768 }
1769
1770 map = read_optional_disjuncts(s, map, v);
1771
1772 vars_drop(v, v->n - n);
1773
1774 obj.v = map;
1775 return obj;
1776 error:
1777 isl_map_free(map);
1778 obj.type = isl_obj_none;
1779 return obj;
1780 }
1781
1782 static struct isl_obj to_union(isl_ctx *ctx, struct isl_obj obj)
1783 {
1784 if (obj.type == isl_obj_map) {
1785 obj.v = isl_union_map_from_map(obj.v);
1786 obj.type = isl_obj_union_map;
1787 } else if (obj.type == isl_obj_set) {
1788 obj.v = isl_union_set_from_set(obj.v);
1789 obj.type = isl_obj_union_set;
1790 } else if (obj.type == isl_obj_pw_qpolynomial) {
1791 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
1792 obj.type = isl_obj_union_pw_qpolynomial;
1793 } else if (obj.type == isl_obj_pw_qpolynomial_fold) {
1794 obj.v = isl_union_pw_qpolynomial_fold_from_pw_qpolynomial_fold(obj.v);
1795 obj.type = isl_obj_union_pw_qpolynomial_fold;
1796 } else
1797 isl_assert(ctx, 0, goto error);
1798 return obj;
1799 error:
1800 obj.type->free(obj.v);
1801 obj.type = isl_obj_none;
1802 return obj;
1803 }
1804
1805 static struct isl_obj obj_add(struct isl_ctx *ctx,
1806 struct isl_obj obj1, struct isl_obj obj2)
1807 {
1808 if (obj1.type == isl_obj_set && obj2.type == isl_obj_union_set)
1809 obj1 = to_union(ctx, obj1);
1810 if (obj1.type == isl_obj_union_set && obj2.type == isl_obj_set)
1811 obj2 = to_union(ctx, obj2);
1812 if (obj1.type == isl_obj_map && obj2.type == isl_obj_union_map)
1813 obj1 = to_union(ctx, obj1);
1814 if (obj1.type == isl_obj_union_map && obj2.type == isl_obj_map)
1815 obj2 = to_union(ctx, obj2);
1816 if (obj1.type == isl_obj_pw_qpolynomial &&
1817 obj2.type == isl_obj_union_pw_qpolynomial)
1818 obj1 = to_union(ctx, obj1);
1819 if (obj1.type == isl_obj_union_pw_qpolynomial &&
1820 obj2.type == isl_obj_pw_qpolynomial)
1821 obj2 = to_union(ctx, obj2);
1822 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
1823 obj2.type == isl_obj_union_pw_qpolynomial_fold)
1824 obj1 = to_union(ctx, obj1);
1825 if (obj1.type == isl_obj_union_pw_qpolynomial_fold &&
1826 obj2.type == isl_obj_pw_qpolynomial_fold)
1827 obj2 = to_union(ctx, obj2);
1828 isl_assert(ctx, obj1.type == obj2.type, goto error);
1829 if (obj1.type == isl_obj_map && !isl_map_has_equal_space(obj1.v, obj2.v)) {
1830 obj1 = to_union(ctx, obj1);
1831 obj2 = to_union(ctx, obj2);
1832 }
1833 if (obj1.type == isl_obj_set && !isl_set_has_equal_space(obj1.v, obj2.v)) {
1834 obj1 = to_union(ctx, obj1);
1835 obj2 = to_union(ctx, obj2);
1836 }
1837 if (obj1.type == isl_obj_pw_qpolynomial &&
1838 !isl_pw_qpolynomial_has_equal_space(obj1.v, obj2.v)) {
1839 obj1 = to_union(ctx, obj1);
1840 obj2 = to_union(ctx, obj2);
1841 }
1842 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
1843 !isl_pw_qpolynomial_fold_has_equal_space(obj1.v, obj2.v)) {
1844 obj1 = to_union(ctx, obj1);
1845 obj2 = to_union(ctx, obj2);
1846 }
1847 obj1.v = obj1.type->add(obj1.v, obj2.v);
1848 return obj1;
1849 error:
1850 obj1.type->free(obj1.v);
1851 obj2.type->free(obj2.v);
1852 obj1.type = isl_obj_none;
1853 obj1.v = NULL;
1854 return obj1;
1855 }
1856
1857 static struct isl_obj obj_read(struct isl_stream *s)
1858 {
1859 isl_map *map = NULL;
1860 struct isl_token *tok;
1861 struct vars *v = NULL;
1862 struct isl_obj obj = { isl_obj_set, NULL };
1863
1864 tok = next_token(s);
1865 if (!tok) {
1866 isl_stream_error(s, NULL, "unexpected EOF");
1867 goto error;
1868 }
1869 if (tok->type == ISL_TOKEN_VALUE) {
1870 struct isl_token *tok2;
1871 struct isl_map *map;
1872
1873 tok2 = isl_stream_next_token(s);
1874 if (!tok2 || tok2->type != ISL_TOKEN_VALUE ||
1875 isl_int_is_neg(tok2->u.v)) {
1876 if (tok2)
1877 isl_stream_push_token(s, tok2);
1878 obj.type = isl_obj_int;
1879 obj.v = isl_int_obj_alloc(s->ctx, tok->u.v);
1880 isl_token_free(tok);
1881 return obj;
1882 }
1883 isl_stream_push_token(s, tok2);
1884 isl_stream_push_token(s, tok);
1885 map = map_read_polylib(s);
1886 if (!map)
1887 goto error;
1888 if (isl_map_may_be_set(map))
1889 obj.v = isl_map_range(map);
1890 else {
1891 obj.type = isl_obj_map;
1892 obj.v = map;
1893 }
1894 return obj;
1895 }
1896 v = vars_new(s->ctx);
1897 if (!v) {
1898 isl_stream_push_token(s, tok);
1899 goto error;
1900 }
1901 map = isl_map_universe(isl_space_params_alloc(s->ctx, 0));
1902 if (tok->type == '[') {
1903 isl_stream_push_token(s, tok);
1904 map = read_tuple(s, map, isl_dim_param, v);
1905 if (!map)
1906 goto error;
1907 tok = isl_stream_next_token(s);
1908 if (!tok || tok->type != ISL_TOKEN_TO) {
1909 isl_stream_error(s, tok, "expecting '->'");
1910 if (tok)
1911 isl_stream_push_token(s, tok);
1912 goto error;
1913 }
1914 isl_token_free(tok);
1915 tok = isl_stream_next_token(s);
1916 }
1917 if (!tok || tok->type != '{') {
1918 isl_stream_error(s, tok, "expecting '{'");
1919 if (tok)
1920 isl_stream_push_token(s, tok);
1921 goto error;
1922 }
1923 isl_token_free(tok);
1924
1925 tok = isl_stream_next_token(s);
1926 if (!tok)
1927 ;
1928 else if (tok->type == ISL_TOKEN_IDENT && !strcmp(tok->u.s, "Sym")) {
1929 isl_token_free(tok);
1930 if (isl_stream_eat(s, '='))
1931 goto error;
1932 map = read_tuple(s, map, isl_dim_param, v);
1933 if (!map)
1934 goto error;
1935 } else if (tok->type == '}') {
1936 obj.type = isl_obj_union_set;
1937 obj.v = isl_union_set_empty(isl_map_get_space(map));
1938 isl_token_free(tok);
1939 goto done;
1940 } else
1941 isl_stream_push_token(s, tok);
1942
1943 for (;;) {
1944 struct isl_obj o;
1945 tok = NULL;
1946 o = obj_read_body(s, isl_map_copy(map), v);
1947 if (o.type == isl_obj_none || !o.v)
1948 goto error;
1949 if (!obj.v)
1950 obj = o;
1951 else {
1952 obj = obj_add(s->ctx, obj, o);
1953 if (obj.type == isl_obj_none || !obj.v)
1954 goto error;
1955 }
1956 tok = isl_stream_next_token(s);
1957 if (!tok || tok->type != ';')
1958 break;
1959 isl_token_free(tok);
1960 if (isl_stream_next_token_is(s, '}')) {
1961 tok = isl_stream_next_token(s);
1962 break;
1963 }
1964 }
1965
1966 if (tok && tok->type == '}') {
1967 isl_token_free(tok);
1968 } else {
1969 isl_stream_error(s, tok, "unexpected isl_token");
1970 if (tok)
1971 isl_token_free(tok);
1972 goto error;
1973 }
1974 done:
1975 vars_free(v);
1976 isl_map_free(map);
1977
1978 return obj;
1979 error:
1980 isl_map_free(map);
1981 obj.type->free(obj.v);
1982 if (v)
1983 vars_free(v);
1984 obj.v = NULL;
1985 return obj;
1986 }
1987
1988 struct isl_obj isl_stream_read_obj(struct isl_stream *s)
1989 {
1990 return obj_read(s);
1991 }
1992
1993 __isl_give isl_map *isl_stream_read_map(struct isl_stream *s)
1994 {
1995 struct isl_obj obj;
1996
1997 obj = obj_read(s);
1998 if (obj.v)
1999 isl_assert(s->ctx, obj.type == isl_obj_map ||
2000 obj.type == isl_obj_set, goto error);
2001
2002 return obj.v;
2003 error:
2004 obj.type->free(obj.v);
2005 return NULL;
2006 }
2007
2008 __isl_give isl_set *isl_stream_read_set(struct isl_stream *s)
2009 {
2010 struct isl_obj obj;
2011
2012 obj = obj_read(s);
2013 if (obj.v) {
2014 if (obj.type == isl_obj_map && isl_map_may_be_set(obj.v)) {
2015 obj.v = isl_map_range(obj.v);
2016 obj.type = isl_obj_set;
2017 }
2018 isl_assert(s->ctx, obj.type == isl_obj_set, goto error);
2019 }
2020
2021 return obj.v;
2022 error:
2023 obj.type->free(obj.v);
2024 return NULL;
2025 }
2026
2027 __isl_give isl_union_map *isl_stream_read_union_map(struct isl_stream *s)
2028 {
2029 struct isl_obj obj;
2030
2031 obj = obj_read(s);
2032 if (obj.type == isl_obj_map) {
2033 obj.type = isl_obj_union_map;
2034 obj.v = isl_union_map_from_map(obj.v);
2035 }
2036 if (obj.type == isl_obj_set) {
2037 obj.type = isl_obj_union_set;
2038 obj.v = isl_union_set_from_set(obj.v);
2039 }
2040 if (obj.v)
2041 isl_assert(s->ctx, obj.type == isl_obj_union_map ||
2042 obj.type == isl_obj_union_set, goto error);
2043
2044 return obj.v;
2045 error:
2046 obj.type->free(obj.v);
2047 return NULL;
2048 }
2049
2050 __isl_give isl_union_set *isl_stream_read_union_set(struct isl_stream *s)
2051 {
2052 struct isl_obj obj;
2053
2054 obj = obj_read(s);
2055 if (obj.type == isl_obj_set) {
2056 obj.type = isl_obj_union_set;
2057 obj.v = isl_union_set_from_set(obj.v);
2058 }
2059 if (obj.v)
2060 isl_assert(s->ctx, obj.type == isl_obj_union_set, goto error);
2061
2062 return obj.v;
2063 error:
2064 obj.type->free(obj.v);
2065 return NULL;
2066 }
2067
2068 static __isl_give isl_basic_map *basic_map_read(struct isl_stream *s)
2069 {
2070 struct isl_obj obj;
2071 struct isl_map *map;
2072 struct isl_basic_map *bmap;
2073
2074 obj = obj_read(s);
2075 map = obj.v;
2076 if (!map)
2077 return NULL;
2078
2079 isl_assert(map->ctx, map->n <= 1, goto error);
2080
2081 if (map->n == 0)
2082 bmap = isl_basic_map_empty_like_map(map);
2083 else
2084 bmap = isl_basic_map_copy(map->p[0]);
2085
2086 isl_map_free(map);
2087
2088 return bmap;
2089 error:
2090 isl_map_free(map);
2091 return NULL;
2092 }
2093
2094 static __isl_give isl_basic_set *basic_set_read(struct isl_stream *s)
2095 {
2096 isl_basic_map *bmap;
2097 bmap = basic_map_read(s);
2098 if (!bmap)
2099 return NULL;
2100 if (!isl_basic_map_may_be_set(bmap))
2101 isl_die(s->ctx, isl_error_invalid,
2102 "input is not a set", goto error);
2103 return isl_basic_map_range(bmap);
2104 error:
2105 isl_basic_map_free(bmap);
2106 return NULL;
2107 }
2108
2109 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
2110 FILE *input)
2111 {
2112 struct isl_basic_map *bmap;
2113 struct isl_stream *s = isl_stream_new_file(ctx, input);
2114 if (!s)
2115 return NULL;
2116 bmap = basic_map_read(s);
2117 isl_stream_free(s);
2118 return bmap;
2119 }
2120
2121 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
2122 FILE *input)
2123 {
2124 isl_basic_set *bset;
2125 struct isl_stream *s = isl_stream_new_file(ctx, input);
2126 if (!s)
2127 return NULL;
2128 bset = basic_set_read(s);
2129 isl_stream_free(s);
2130 return bset;
2131 }
2132
2133 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
2134 const char *str)
2135 {
2136 struct isl_basic_map *bmap;
2137 struct isl_stream *s = isl_stream_new_str(ctx, str);
2138 if (!s)
2139 return NULL;
2140 bmap = basic_map_read(s);
2141 isl_stream_free(s);
2142 return bmap;
2143 }
2144
2145 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
2146 const char *str)
2147 {
2148 isl_basic_set *bset;
2149 struct isl_stream *s = isl_stream_new_str(ctx, str);
2150 if (!s)
2151 return NULL;
2152 bset = basic_set_read(s);
2153 isl_stream_free(s);
2154 return bset;
2155 }
2156
2157 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
2158 FILE *input)
2159 {
2160 struct isl_map *map;
2161 struct isl_stream *s = isl_stream_new_file(ctx, input);
2162 if (!s)
2163 return NULL;
2164 map = isl_stream_read_map(s);
2165 isl_stream_free(s);
2166 return map;
2167 }
2168
2169 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
2170 const char *str)
2171 {
2172 struct isl_map *map;
2173 struct isl_stream *s = isl_stream_new_str(ctx, str);
2174 if (!s)
2175 return NULL;
2176 map = isl_stream_read_map(s);
2177 isl_stream_free(s);
2178 return map;
2179 }
2180
2181 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
2182 FILE *input)
2183 {
2184 isl_set *set;
2185 struct isl_stream *s = isl_stream_new_file(ctx, input);
2186 if (!s)
2187 return NULL;
2188 set = isl_stream_read_set(s);
2189 isl_stream_free(s);
2190 return set;
2191 }
2192
2193 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
2194 const char *str)
2195 {
2196 isl_set *set;
2197 struct isl_stream *s = isl_stream_new_str(ctx, str);
2198 if (!s)
2199 return NULL;
2200 set = isl_stream_read_set(s);
2201 isl_stream_free(s);
2202 return set;
2203 }
2204
2205 __isl_give isl_union_map *isl_union_map_read_from_file(isl_ctx *ctx,
2206 FILE *input)
2207 {
2208 isl_union_map *umap;
2209 struct isl_stream *s = isl_stream_new_file(ctx, input);
2210 if (!s)
2211 return NULL;
2212 umap = isl_stream_read_union_map(s);
2213 isl_stream_free(s);
2214 return umap;
2215 }
2216
2217 __isl_give isl_union_map *isl_union_map_read_from_str(struct isl_ctx *ctx,
2218 const char *str)
2219 {
2220 isl_union_map *umap;
2221 struct isl_stream *s = isl_stream_new_str(ctx, str);
2222 if (!s)
2223 return NULL;
2224 umap = isl_stream_read_union_map(s);
2225 isl_stream_free(s);
2226 return umap;
2227 }
2228
2229 __isl_give isl_union_set *isl_union_set_read_from_file(isl_ctx *ctx,
2230 FILE *input)
2231 {
2232 isl_union_set *uset;
2233 struct isl_stream *s = isl_stream_new_file(ctx, input);
2234 if (!s)
2235 return NULL;
2236 uset = isl_stream_read_union_set(s);
2237 isl_stream_free(s);
2238 return uset;
2239 }
2240
2241 __isl_give isl_union_set *isl_union_set_read_from_str(struct isl_ctx *ctx,
2242 const char *str)
2243 {
2244 isl_union_set *uset;
2245 struct isl_stream *s = isl_stream_new_str(ctx, str);
2246 if (!s)
2247 return NULL;
2248 uset = isl_stream_read_union_set(s);
2249 isl_stream_free(s);
2250 return uset;
2251 }
2252
2253 static __isl_give isl_vec *isl_vec_read_polylib(struct isl_stream *s)
2254 {
2255 struct isl_vec *vec = NULL;
2256 struct isl_token *tok;
2257 unsigned size;
2258 int j;
2259
2260 tok = isl_stream_next_token(s);
2261 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2262 isl_stream_error(s, tok, "expecting vector length");
2263 goto error;
2264 }
2265
2266 size = isl_int_get_si(tok->u.v);
2267 isl_token_free(tok);
2268
2269 vec = isl_vec_alloc(s->ctx, size);
2270
2271 for (j = 0; j < size; ++j) {
2272 tok = isl_stream_next_token(s);
2273 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2274 isl_stream_error(s, tok, "expecting constant value");
2275 goto error;
2276 }
2277 isl_int_set(vec->el[j], tok->u.v);
2278 isl_token_free(tok);
2279 }
2280
2281 return vec;
2282 error:
2283 isl_token_free(tok);
2284 isl_vec_free(vec);
2285 return NULL;
2286 }
2287
2288 static __isl_give isl_vec *vec_read(struct isl_stream *s)
2289 {
2290 return isl_vec_read_polylib(s);
2291 }
2292
2293 __isl_give isl_vec *isl_vec_read_from_file(isl_ctx *ctx, FILE *input)
2294 {
2295 isl_vec *v;
2296 struct isl_stream *s = isl_stream_new_file(ctx, input);
2297 if (!s)
2298 return NULL;
2299 v = vec_read(s);
2300 isl_stream_free(s);
2301 return v;
2302 }
2303
2304 __isl_give isl_pw_qpolynomial *isl_stream_read_pw_qpolynomial(
2305 struct isl_stream *s)
2306 {
2307 struct isl_obj obj;
2308
2309 obj = obj_read(s);
2310 if (obj.v)
2311 isl_assert(s->ctx, obj.type == isl_obj_pw_qpolynomial,
2312 goto error);
2313
2314 return obj.v;
2315 error:
2316 obj.type->free(obj.v);
2317 return NULL;
2318 }
2319
2320 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_str(isl_ctx *ctx,
2321 const char *str)
2322 {
2323 isl_pw_qpolynomial *pwqp;
2324 struct isl_stream *s = isl_stream_new_str(ctx, str);
2325 if (!s)
2326 return NULL;
2327 pwqp = isl_stream_read_pw_qpolynomial(s);
2328 isl_stream_free(s);
2329 return pwqp;
2330 }
2331
2332 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_file(isl_ctx *ctx,
2333 FILE *input)
2334 {
2335 isl_pw_qpolynomial *pwqp;
2336 struct isl_stream *s = isl_stream_new_file(ctx, input);
2337 if (!s)
2338 return NULL;
2339 pwqp = isl_stream_read_pw_qpolynomial(s);
2340 isl_stream_free(s);
2341 return pwqp;
2342 }
2343
2344 /* Read an affine expression from "s" with domain (space) "dom".
2345 * We call accept_affine to parse a possibly piecewise affine expression
2346 * and then check that the result is a single affine expression on
2347 * a universe domain.
2348 */
2349 static __isl_give isl_aff *read_aff_with_dom(struct isl_stream *s,
2350 __isl_take isl_set *dom, struct vars *v)
2351 {
2352 isl_aff *aff = NULL;
2353 isl_pw_aff *pwaff = NULL;
2354
2355 if (!isl_set_plain_is_universe(dom))
2356 isl_die(s->ctx, isl_error_invalid,
2357 "expecting universe domain", goto error);
2358
2359 if (!isl_set_is_params(dom) && isl_stream_eat(s, ISL_TOKEN_TO))
2360 goto error;
2361
2362 if (isl_stream_eat(s, '['))
2363 goto error;
2364
2365 pwaff = accept_affine(s, isl_set_get_space(dom), v);
2366
2367 if (isl_stream_eat(s, ']'))
2368 goto error;
2369 if (isl_stream_eat(s, '}'))
2370 goto error;
2371
2372 if (!pwaff)
2373 goto error;
2374
2375 if (pwaff->n != 1)
2376 isl_die(s->ctx, isl_error_invalid,
2377 "expecting single affine expression", goto error);
2378 if (!isl_set_plain_is_universe(pwaff->p[0].set))
2379 isl_die(s->ctx, isl_error_invalid,
2380 "expecting universe domain", goto error);
2381
2382 aff = isl_aff_copy(pwaff->p[0].aff);
2383
2384 vars_free(v);
2385 isl_pw_aff_free(pwaff);
2386 isl_set_free(dom);
2387 return aff;
2388 error:
2389 vars_free(v);
2390 isl_pw_aff_free(pwaff);
2391 isl_set_free(dom);
2392 return NULL;
2393 }
2394
2395 /* Is the next token an identifer not in "v"?
2396 */
2397 static int next_is_fresh_ident(struct isl_stream *s, struct vars *v)
2398 {
2399 int n = v->n;
2400 int fresh;
2401 struct isl_token *tok;
2402
2403 tok = isl_stream_next_token(s);
2404 if (!tok)
2405 return 0;
2406 fresh = tok->type == ISL_TOKEN_IDENT && vars_pos(v, tok->u.s, -1) >= n;
2407 isl_stream_push_token(s, tok);
2408
2409 vars_drop(v, v->n - n);
2410
2411 return fresh;
2412 }
2413
2414 /* First read the domain of the affine expression, which may be
2415 * a parameter space or a set.
2416 * The tricky part is that we don't know if the domain is a set or not,
2417 * so when we are trying to read the domain, we may actually be reading
2418 * the affine expression itself (defined on a parameter domains)
2419 * If the tuple we are reading is named, we assume it's the domain.
2420 * Also, if inside the tuple, the first thing we find is a nested tuple
2421 * or a new identifier, we again assume it's the domain.
2422 * Otherwise, we assume we are reading an affine expression.
2423 */
2424 static __isl_give isl_set *read_aff_domain(struct isl_stream *s,
2425 __isl_take isl_set *dom, struct vars *v)
2426 {
2427 struct isl_token *tok;
2428
2429 tok = isl_stream_next_token(s);
2430 if (tok && (tok->type == ISL_TOKEN_IDENT || tok->is_keyword)) {
2431 isl_stream_push_token(s, tok);
2432 return read_tuple(s, dom, isl_dim_set, v);
2433 }
2434 if (!tok || tok->type != '[') {
2435 isl_stream_error(s, tok, "expecting '['");
2436 goto error;
2437 }
2438 if (next_is_tuple(s) || next_is_fresh_ident(s, v)) {
2439 isl_stream_push_token(s, tok);
2440 dom = read_tuple(s, dom, isl_dim_set, v);
2441 } else
2442 isl_stream_push_token(s, tok);
2443
2444 return dom;
2445 error:
2446 if (tok)
2447 isl_stream_push_token(s, tok);
2448 vars_free(v);
2449 isl_set_free(dom);
2450 return NULL;
2451 }
2452
2453 /* Read an affine expression from "s".
2454 * We first read the domain of the affine expression, which may be
2455 * a parameter space or a set, and then call read_aff_with_dom.
2456 */
2457 __isl_give isl_aff *isl_stream_read_aff(struct isl_stream *s)
2458 {
2459 struct vars *v;
2460 isl_set *dom = NULL;
2461
2462 v = vars_new(s->ctx);
2463 if (!v)
2464 return NULL;
2465
2466 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
2467 if (next_is_tuple(s)) {
2468 dom = read_tuple(s, dom, isl_dim_param, v);
2469 if (isl_stream_eat(s, ISL_TOKEN_TO))
2470 goto error;
2471 }
2472 if (isl_stream_eat(s, '{'))
2473 goto error;
2474
2475 dom = read_aff_domain(s, dom, v);
2476 return read_aff_with_dom(s, dom, v);
2477 error:
2478 vars_free(v);
2479 isl_set_free(dom);
2480 return NULL;
2481 }
2482
2483 /* Read a piecewise affine expression from "s" with domain (space) "dom".
2484 */
2485 static __isl_give isl_pw_aff *read_pw_aff_with_dom(struct isl_stream *s,
2486 __isl_take isl_set *dom, struct vars *v)
2487 {
2488 isl_pw_aff *pwaff = NULL;
2489
2490 if (!isl_set_is_params(dom) && isl_stream_eat(s, ISL_TOKEN_TO))
2491 goto error;
2492
2493 if (isl_stream_eat(s, '['))
2494 goto error;
2495
2496 pwaff = accept_affine(s, isl_set_get_space(dom), v);
2497
2498 if (isl_stream_eat(s, ']'))
2499 goto error;
2500
2501 dom = read_optional_disjuncts(s, dom, v);
2502 pwaff = isl_pw_aff_intersect_domain(pwaff, dom);
2503
2504 return pwaff;
2505 error:
2506 isl_set_free(dom);
2507 isl_pw_aff_free(pwaff);
2508 return NULL;
2509 }
2510
2511 __isl_give isl_pw_aff *isl_stream_read_pw_aff(struct isl_stream *s)
2512 {
2513 struct vars *v;
2514 isl_set *dom = NULL;
2515 isl_set *aff_dom;
2516 isl_pw_aff *pa = NULL;
2517 int n;
2518
2519 v = vars_new(s->ctx);
2520 if (!v)
2521 return NULL;
2522
2523 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
2524 if (next_is_tuple(s)) {
2525 dom = read_tuple(s, dom, isl_dim_param, v);
2526 if (isl_stream_eat(s, ISL_TOKEN_TO))
2527 goto error;
2528 }
2529 if (isl_stream_eat(s, '{'))
2530 goto error;
2531
2532 n = v->n;
2533 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
2534 pa = read_pw_aff_with_dom(s, aff_dom, v);
2535 vars_drop(v, v->n - n);
2536
2537 while (isl_stream_eat_if_available(s, ';')) {
2538 isl_pw_aff *pa_i;
2539
2540 n = v->n;
2541 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
2542 pa_i = read_pw_aff_with_dom(s, aff_dom, v);
2543 vars_drop(v, v->n - n);
2544
2545 pa = isl_pw_aff_union_add(pa, pa_i);
2546 }
2547
2548 if (isl_stream_eat(s, '}'))
2549 goto error;
2550
2551 vars_free(v);
2552 isl_set_free(dom);
2553 return pa;
2554 error:
2555 vars_free(v);
2556 isl_set_free(dom);
2557 isl_pw_aff_free(pa);
2558 return NULL;
2559 }
2560
2561 __isl_give isl_aff *isl_aff_read_from_str(isl_ctx *ctx, const char *str)
2562 {
2563 isl_aff *aff;
2564 struct isl_stream *s = isl_stream_new_str(ctx, str);
2565 if (!s)
2566 return NULL;
2567 aff = isl_stream_read_aff(s);
2568 isl_stream_free(s);
2569 return aff;
2570 }
2571
2572 __isl_give isl_pw_aff *isl_pw_aff_read_from_str(isl_ctx *ctx, const char *str)
2573 {
2574 isl_pw_aff *pa;
2575 struct isl_stream *s = isl_stream_new_str(ctx, str);
2576 if (!s)
2577 return NULL;
2578 pa = isl_stream_read_pw_aff(s);
2579 isl_stream_free(s);
2580 return pa;
2581 }
2582
2583 /* Read an isl_pw_multi_aff from "s".
2584 * We currently read a generic object and if it turns out to be a set or
2585 * a map, we convert that to an isl_pw_multi_aff.
2586 * It would be more efficient if we were to construct the isl_pw_multi_aff
2587 * directly.
2588 */
2589 __isl_give isl_pw_multi_aff *isl_stream_read_pw_multi_aff(struct isl_stream *s)
2590 {
2591 struct isl_obj obj;
2592
2593 obj = obj_read(s);
2594 if (!obj.v)
2595 return NULL;
2596
2597 if (obj.type == isl_obj_map)
2598 return isl_pw_multi_aff_from_map(obj.v);
2599 if (obj.type == isl_obj_set)
2600 return isl_pw_multi_aff_from_set(obj.v);
2601
2602 obj.type->free(obj.v);
2603 isl_die(s->ctx, isl_error_invalid, "unexpected object type",
2604 return NULL);
2605 }
2606
2607 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_read_from_str(isl_ctx *ctx,
2608 const char *str)
2609 {
2610 isl_pw_multi_aff *pma;
2611 struct isl_stream *s = isl_stream_new_str(ctx, str);
2612 if (!s)
2613 return NULL;
2614 pma = isl_stream_read_pw_multi_aff(s);
2615 isl_stream_free(s);
2616 return pma;
2617 }
2618
2619 /* Read a multi-affine expression from "s".
2620 * We call isl_stream_read_pw_multi_aff to parse a possibly piecewise
2621 * multi-affine expression and then check that the result is
2622 * a single multi-affine expression on a universe domain.
2623 */
2624 __isl_give isl_multi_aff *isl_stream_read_multi_aff(struct isl_stream *s)
2625 {
2626 isl_pw_multi_aff *pma;
2627 isl_multi_aff *maff;
2628
2629 pma = isl_stream_read_pw_multi_aff(s);
2630 if (!pma)
2631 return NULL;
2632 if (pma->n != 1)
2633 isl_die(s->ctx, isl_error_invalid,
2634 "expecting single list of affine expressions",
2635 return isl_pw_multi_aff_free(pma));
2636 if (!isl_set_plain_is_universe(pma->p[0].set))
2637 isl_die(s->ctx, isl_error_invalid, "expecting universe domain",
2638 return isl_pw_multi_aff_free(pma));
2639 maff = isl_multi_aff_copy(pma->p[0].maff);
2640 isl_pw_multi_aff_free(pma);
2641 return maff;
2642 }
2643
2644 __isl_give isl_multi_aff *isl_multi_aff_read_from_str(isl_ctx *ctx,
2645 const char *str)
2646 {
2647 isl_multi_aff *maff;
2648 struct isl_stream *s = isl_stream_new_str(ctx, str);
2649 if (!s)
2650 return NULL;
2651 maff = isl_stream_read_multi_aff(s);
2652 isl_stream_free(s);
2653 return maff;
2654 }
2655
2656 __isl_give isl_union_pw_qpolynomial *isl_stream_read_union_pw_qpolynomial(
2657 struct isl_stream *s)
2658 {
2659 struct isl_obj obj;
2660
2661 obj = obj_read(s);
2662 if (obj.type == isl_obj_pw_qpolynomial) {
2663 obj.type = isl_obj_union_pw_qpolynomial;
2664 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
2665 }
2666 if (obj.v)
2667 isl_assert(s->ctx, obj.type == isl_obj_union_pw_qpolynomial,
2668 goto error);
2669
2670 return obj.v;
2671 error:
2672 obj.type->free(obj.v);
2673 return NULL;
2674 }
2675
2676 __isl_give isl_union_pw_qpolynomial *isl_union_pw_qpolynomial_read_from_str(
2677 isl_ctx *ctx, const char *str)
2678 {
2679 isl_union_pw_qpolynomial *upwqp;
2680 struct isl_stream *s = isl_stream_new_str(ctx, str);
2681 if (!s)
2682 return NULL;
2683 upwqp = isl_stream_read_union_pw_qpolynomial(s);
2684 isl_stream_free(s);
2685 return upwqp;
2686 }
Integer set library