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[isl.git] / isl_input.c
blob7cc603c52a0cee3e0bfb9983a7c5c66ff9a26963
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 * Copyright 2012-2013 Ecole Normale Superieure
5 *
6 * Use of this software is governed by the MIT license
7 *
8 * Written by Sven Verdoolaege, K.U.Leuven, Departement
9 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
10 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
11 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
12 * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
13 */
14
15 #include <ctype.h>
16 #include <stdio.h>
17 #include <string.h>
18 #include <isl_ctx_private.h>
19 #include <isl_map_private.h>
20 #include <isl/set.h>
21 #include <isl_seq.h>
22 #include <isl_stream_private.h>
23 #include <isl/obj.h>
24 #include "isl_polynomial_private.h"
25 #include <isl/union_map.h>
26 #include <isl_mat_private.h>
27 #include <isl_aff_private.h>
28 #include <isl_vec_private.h>
29 #include <isl/list.h>
30 #include <isl_val_private.h>
31
32 struct variable {
33 char *name;
34 int pos;
35 struct variable *next;
36 };
37
38 struct vars {
39 struct isl_ctx *ctx;
40 int n;
41 struct variable *v;
42 };
43
44 static struct vars *vars_new(struct isl_ctx *ctx)
45 {
46 struct vars *v;
47 v = isl_alloc_type(ctx, struct vars);
48 if (!v)
49 return NULL;
50 v->ctx = ctx;
51 v->n = 0;
52 v->v = NULL;
53 return v;
54 }
55
56 static void variable_free(struct variable *var)
57 {
58 while (var) {
59 struct variable *next = var->next;
60 free(var->name);
61 free(var);
62 var = next;
63 }
64 }
65
66 static void vars_free(struct vars *v)
67 {
68 if (!v)
69 return;
70 variable_free(v->v);
71 free(v);
72 }
73
74 static void vars_drop(struct vars *v, int n)
75 {
76 struct variable *var;
77
78 if (!v || !v->v)
79 return;
80
81 v->n -= n;
82
83 var = v->v;
84 while (--n >= 0) {
85 struct variable *next = var->next;
86 free(var->name);
87 free(var);
88 var = next;
89 }
90 v->v = var;
91 }
92
93 static struct variable *variable_new(struct vars *v, const char *name, int len,
94 int pos)
95 {
96 struct variable *var;
97 var = isl_calloc_type(v->ctx, struct variable);
98 if (!var)
99 goto error;
100 var->name = strdup(name);
101 var->name[len] = '\0';
102 var->pos = pos;
103 var->next = v->v;
104 return var;
105 error:
106 variable_free(v->v);
107 return NULL;
108 }
109
110 static int vars_pos(struct vars *v, const char *s, int len)
111 {
112 int pos;
113 struct variable *q;
114
115 if (len == -1)
116 len = strlen(s);
117 for (q = v->v; q; q = q->next) {
118 if (strncmp(q->name, s, len) == 0 && q->name[len] == '\0')
119 break;
120 }
121 if (q)
122 pos = q->pos;
123 else {
124 pos = v->n;
125 v->v = variable_new(v, s, len, v->n);
126 if (!v->v)
127 return -1;
128 v->n++;
129 }
130 return pos;
131 }
132
133 static int vars_add_anon(struct vars *v)
134 {
135 v->v = variable_new(v, "", 0, v->n);
136
137 if (!v->v)
138 return -1;
139 v->n++;
140
141 return 0;
142 }
143
144 /* Obtain next token, with some preprocessing.
145 * In particular, evaluate expressions of the form x^y,
146 * with x and y values.
147 */
148 static struct isl_token *next_token(__isl_keep isl_stream *s)
149 {
150 struct isl_token *tok, *tok2;
151
152 tok = isl_stream_next_token(s);
153 if (!tok || tok->type != ISL_TOKEN_VALUE)
154 return tok;
155 if (!isl_stream_eat_if_available(s, '^'))
156 return tok;
157 tok2 = isl_stream_next_token(s);
158 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
159 isl_stream_error(s, tok2, "expecting constant value");
160 goto error;
161 }
162
163 isl_int_pow_ui(tok->u.v, tok->u.v, isl_int_get_ui(tok2->u.v));
164
165 isl_token_free(tok2);
166 return tok;
167 error:
168 isl_token_free(tok);
169 isl_token_free(tok2);
170 return NULL;
171 }
172
173 /* Read an isl_val from "s".
174 *
175 * The following token sequences are recognized
176 *
177 * "infty" -> infty
178 * "-" "infty" -> -infty
179 * "NaN" -> NaN
180 * n "/" d -> n/d
181 * v -> v
182 *
183 * where n, d and v are integer constants.
184 */
185 __isl_give isl_val *isl_stream_read_val(__isl_keep isl_stream *s)
186 {
187 struct isl_token *tok = NULL;
188 struct isl_token *tok2 = NULL;
189 isl_val *val;
190
191 tok = next_token(s);
192 if (!tok) {
193 isl_stream_error(s, NULL, "unexpected EOF");
194 goto error;
195 }
196 if (tok->type == ISL_TOKEN_INFTY) {
197 isl_token_free(tok);
198 return isl_val_infty(s->ctx);
199 }
200 if (tok->type == '-' &&
201 isl_stream_eat_if_available(s, ISL_TOKEN_INFTY)) {
202 isl_token_free(tok);
203 return isl_val_neginfty(s->ctx);
204 }
205 if (tok->type == ISL_TOKEN_NAN) {
206 isl_token_free(tok);
207 return isl_val_nan(s->ctx);
208 }
209 if (tok->type != ISL_TOKEN_VALUE) {
210 isl_stream_error(s, tok, "expecting value");
211 goto error;
212 }
213
214 if (isl_stream_eat_if_available(s, '/')) {
215 tok2 = next_token(s);
216 if (!tok2) {
217 isl_stream_error(s, NULL, "unexpected EOF");
218 goto error;
219 }
220 if (tok2->type != ISL_TOKEN_VALUE) {
221 isl_stream_error(s, tok2, "expecting value");
222 goto error;
223 }
224 val = isl_val_rat_from_isl_int(s->ctx, tok->u.v, tok2->u.v);
225 val = isl_val_normalize(val);
226 } else {
227 val = isl_val_int_from_isl_int(s->ctx, tok->u.v);
228 }
229
230 isl_token_free(tok);
231 isl_token_free(tok2);
232 return val;
233 error:
234 isl_token_free(tok);
235 isl_token_free(tok2);
236 return NULL;
237 }
238
239 /* Read an isl_val from "str".
240 */
241 struct isl_val *isl_val_read_from_str(struct isl_ctx *ctx,
242 const char *str)
243 {
244 isl_val *val;
245 isl_stream *s = isl_stream_new_str(ctx, str);
246 if (!s)
247 return NULL;
248 val = isl_stream_read_val(s);
249 isl_stream_free(s);
250 return val;
251 }
252
253 static int accept_cst_factor(__isl_keep isl_stream *s, isl_int *f)
254 {
255 struct isl_token *tok;
256
257 tok = next_token(s);
258 if (!tok || tok->type != ISL_TOKEN_VALUE) {
259 isl_stream_error(s, tok, "expecting constant value");
260 goto error;
261 }
262
263 isl_int_mul(*f, *f, tok->u.v);
264
265 isl_token_free(tok);
266
267 if (isl_stream_eat_if_available(s, '*'))
268 return accept_cst_factor(s, f);
269
270 return 0;
271 error:
272 isl_token_free(tok);
273 return -1;
274 }
275
276 /* Given an affine expression aff, return an affine expression
277 * for aff % d, with d the next token on the stream, which is
278 * assumed to be a constant.
279 *
280 * We introduce an integer division q = [aff/d] and the result
281 * is set to aff - d q.
282 */
283 static __isl_give isl_pw_aff *affine_mod(__isl_keep isl_stream *s,
284 struct vars *v, __isl_take isl_pw_aff *aff)
285 {
286 struct isl_token *tok;
287 isl_pw_aff *q;
288
289 tok = next_token(s);
290 if (!tok || tok->type != ISL_TOKEN_VALUE) {
291 isl_stream_error(s, tok, "expecting constant value");
292 goto error;
293 }
294
295 q = isl_pw_aff_copy(aff);
296 q = isl_pw_aff_scale_down(q, tok->u.v);
297 q = isl_pw_aff_floor(q);
298 q = isl_pw_aff_scale(q, tok->u.v);
299
300 aff = isl_pw_aff_sub(aff, q);
301
302 isl_token_free(tok);
303 return aff;
304 error:
305 isl_pw_aff_free(aff);
306 isl_token_free(tok);
307 return NULL;
308 }
309
310 static __isl_give isl_pw_aff *accept_affine(__isl_keep isl_stream *s,
311 __isl_take isl_space *space, struct vars *v);
312 static __isl_give isl_pw_aff_list *accept_affine_list(__isl_keep isl_stream *s,
313 __isl_take isl_space *dim, struct vars *v);
314
315 static __isl_give isl_pw_aff *accept_minmax(__isl_keep isl_stream *s,
316 __isl_take isl_space *dim, struct vars *v)
317 {
318 struct isl_token *tok;
319 isl_pw_aff_list *list = NULL;
320 int min;
321
322 tok = isl_stream_next_token(s);
323 if (!tok)
324 goto error;
325 min = tok->type == ISL_TOKEN_MIN;
326 isl_token_free(tok);
327
328 if (isl_stream_eat(s, '('))
329 goto error;
330
331 list = accept_affine_list(s, isl_space_copy(dim), v);
332 if (!list)
333 goto error;
334
335 if (isl_stream_eat(s, ')'))
336 goto error;
337
338 isl_space_free(dim);
339 return min ? isl_pw_aff_list_min(list) : isl_pw_aff_list_max(list);
340 error:
341 isl_space_free(dim);
342 isl_pw_aff_list_free(list);
343 return NULL;
344 }
345
346 /* Is "tok" the start of an integer division?
347 */
348 static int is_start_of_div(struct isl_token *tok)
349 {
350 if (!tok)
351 return 0;
352 if (tok->type == '[')
353 return 1;
354 if (tok->type == ISL_TOKEN_FLOOR)
355 return 1;
356 if (tok->type == ISL_TOKEN_CEIL)
357 return 1;
358 if (tok->type == ISL_TOKEN_FLOORD)
359 return 1;
360 if (tok->type == ISL_TOKEN_CEILD)
361 return 1;
362 return 0;
363 }
364
365 /* Read an integer division from "s" and return it as an isl_pw_aff.
366 *
367 * The integer division can be of the form
368 *
369 * [<affine expression>]
370 * floor(<affine expression>)
371 * ceil(<affine expression>)
372 * floord(<affine expression>,<denominator>)
373 * ceild(<affine expression>,<denominator>)
374 */
375 static __isl_give isl_pw_aff *accept_div(__isl_keep isl_stream *s,
376 __isl_take isl_space *dim, struct vars *v)
377 {
378 struct isl_token *tok;
379 int f = 0;
380 int c = 0;
381 int extra = 0;
382 isl_pw_aff *pwaff = NULL;
383
384 if (isl_stream_eat_if_available(s, ISL_TOKEN_FLOORD))
385 extra = f = 1;
386 else if (isl_stream_eat_if_available(s, ISL_TOKEN_CEILD))
387 extra = c = 1;
388 else if (isl_stream_eat_if_available(s, ISL_TOKEN_FLOOR))
389 f = 1;
390 else if (isl_stream_eat_if_available(s, ISL_TOKEN_CEIL))
391 c = 1;
392 if (f || c) {
393 if (isl_stream_eat(s, '('))
394 goto error;
395 } else {
396 if (isl_stream_eat(s, '['))
397 goto error;
398 }
399
400 pwaff = accept_affine(s, isl_space_copy(dim), v);
401
402 if (extra) {
403 if (isl_stream_eat(s, ','))
404 goto error;
405
406 tok = next_token(s);
407 if (!tok)
408 goto error;
409 if (tok->type != ISL_TOKEN_VALUE) {
410 isl_stream_error(s, tok, "expected denominator");
411 isl_stream_push_token(s, tok);
412 goto error;
413 }
414 isl_pw_aff_scale_down(pwaff, tok->u.v);
415 isl_token_free(tok);
416 }
417
418 if (c)
419 pwaff = isl_pw_aff_ceil(pwaff);
420 else
421 pwaff = isl_pw_aff_floor(pwaff);
422
423 if (f || c) {
424 if (isl_stream_eat(s, ')'))
425 goto error;
426 } else {
427 if (isl_stream_eat(s, ']'))
428 goto error;
429 }
430
431 isl_space_free(dim);
432 return pwaff;
433 error:
434 isl_space_free(dim);
435 isl_pw_aff_free(pwaff);
436 return NULL;
437 }
438
439 static __isl_give isl_pw_aff *accept_affine_factor(__isl_keep isl_stream *s,
440 __isl_take isl_space *dim, struct vars *v)
441 {
442 struct isl_token *tok = NULL;
443 isl_pw_aff *res = NULL;
444
445 tok = next_token(s);
446 if (!tok) {
447 isl_stream_error(s, NULL, "unexpected EOF");
448 goto error;
449 }
450
451 if (tok->type == ISL_TOKEN_AFF) {
452 res = isl_pw_aff_copy(tok->u.pwaff);
453 isl_token_free(tok);
454 } else if (tok->type == ISL_TOKEN_IDENT) {
455 int n = v->n;
456 int pos = vars_pos(v, tok->u.s, -1);
457 isl_aff *aff;
458
459 if (pos < 0)
460 goto error;
461 if (pos >= n) {
462 vars_drop(v, v->n - n);
463 isl_stream_error(s, tok, "unknown identifier");
464 goto error;
465 }
466
467 aff = isl_aff_zero_on_domain(isl_local_space_from_space(isl_space_copy(dim)));
468 if (!aff)
469 goto error;
470 isl_int_set_si(aff->v->el[2 + pos], 1);
471 res = isl_pw_aff_from_aff(aff);
472 isl_token_free(tok);
473 } else if (tok->type == ISL_TOKEN_VALUE) {
474 if (isl_stream_eat_if_available(s, '*')) {
475 res = accept_affine_factor(s, isl_space_copy(dim), v);
476 res = isl_pw_aff_scale(res, tok->u.v);
477 } else {
478 isl_local_space *ls;
479 isl_aff *aff;
480 ls = isl_local_space_from_space(isl_space_copy(dim));
481 aff = isl_aff_zero_on_domain(ls);
482 aff = isl_aff_add_constant(aff, tok->u.v);
483 res = isl_pw_aff_from_aff(aff);
484 }
485 isl_token_free(tok);
486 } else if (tok->type == '(') {
487 isl_token_free(tok);
488 tok = NULL;
489 res = accept_affine(s, isl_space_copy(dim), v);
490 if (!res)
491 goto error;
492 if (isl_stream_eat(s, ')'))
493 goto error;
494 } else if (is_start_of_div(tok)) {
495 isl_stream_push_token(s, tok);
496 tok = NULL;
497 res = accept_div(s, isl_space_copy(dim), v);
498 } else if (tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX) {
499 isl_stream_push_token(s, tok);
500 tok = NULL;
501 res = accept_minmax(s, isl_space_copy(dim), v);
502 } else {
503 isl_stream_error(s, tok, "expecting factor");
504 goto error;
505 }
506 if (isl_stream_eat_if_available(s, '%') ||
507 isl_stream_eat_if_available(s, ISL_TOKEN_MOD)) {
508 isl_space_free(dim);
509 return affine_mod(s, v, res);
510 }
511 if (isl_stream_eat_if_available(s, '*')) {
512 isl_int f;
513 isl_int_init(f);
514 isl_int_set_si(f, 1);
515 if (accept_cst_factor(s, &f) < 0) {
516 isl_int_clear(f);
517 goto error2;
518 }
519 res = isl_pw_aff_scale(res, f);
520 isl_int_clear(f);
521 }
522 if (isl_stream_eat_if_available(s, '/')) {
523 isl_int f;
524 isl_int_init(f);
525 isl_int_set_si(f, 1);
526 if (accept_cst_factor(s, &f) < 0) {
527 isl_int_clear(f);
528 goto error2;
529 }
530 res = isl_pw_aff_scale_down(res, f);
531 isl_int_clear(f);
532 }
533
534 isl_space_free(dim);
535 return res;
536 error:
537 isl_token_free(tok);
538 error2:
539 isl_pw_aff_free(res);
540 isl_space_free(dim);
541 return NULL;
542 }
543
544 static __isl_give isl_pw_aff *add_cst(__isl_take isl_pw_aff *pwaff, isl_int v)
545 {
546 isl_aff *aff;
547 isl_space *space;
548
549 space = isl_pw_aff_get_domain_space(pwaff);
550 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
551 aff = isl_aff_add_constant(aff, v);
552
553 return isl_pw_aff_add(pwaff, isl_pw_aff_from_aff(aff));
554 }
555
556 /* Return a piecewise affine expression defined on the specified domain
557 * that represents NaN.
558 */
559 static __isl_give isl_pw_aff *nan_on_domain(__isl_keep isl_space *space)
560 {
561 isl_local_space *ls;
562
563 ls = isl_local_space_from_space(isl_space_copy(space));
564 return isl_pw_aff_nan_on_domain(ls);
565 }
566
567 static __isl_give isl_pw_aff *accept_affine(__isl_keep isl_stream *s,
568 __isl_take isl_space *space, struct vars *v)
569 {
570 struct isl_token *tok = NULL;
571 isl_local_space *ls;
572 isl_pw_aff *res;
573 int sign = 1;
574
575 ls = isl_local_space_from_space(isl_space_copy(space));
576 res = isl_pw_aff_from_aff(isl_aff_zero_on_domain(ls));
577 if (!res)
578 goto error;
579
580 for (;;) {
581 tok = next_token(s);
582 if (!tok) {
583 isl_stream_error(s, NULL, "unexpected EOF");
584 goto error;
585 }
586 if (tok->type == '-') {
587 sign = -sign;
588 isl_token_free(tok);
589 continue;
590 }
591 if (tok->type == '(' || is_start_of_div(tok) ||
592 tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX ||
593 tok->type == ISL_TOKEN_IDENT ||
594 tok->type == ISL_TOKEN_AFF) {
595 isl_pw_aff *term;
596 isl_stream_push_token(s, tok);
597 tok = NULL;
598 term = accept_affine_factor(s,
599 isl_space_copy(space), v);
600 if (sign < 0)
601 res = isl_pw_aff_sub(res, term);
602 else
603 res = isl_pw_aff_add(res, term);
604 if (!res)
605 goto error;
606 sign = 1;
607 } else if (tok->type == ISL_TOKEN_VALUE) {
608 if (sign < 0)
609 isl_int_neg(tok->u.v, tok->u.v);
610 if (isl_stream_eat_if_available(s, '*') ||
611 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
612 isl_pw_aff *term;
613 term = accept_affine_factor(s,
614 isl_space_copy(space), v);
615 term = isl_pw_aff_scale(term, tok->u.v);
616 res = isl_pw_aff_add(res, term);
617 if (!res)
618 goto error;
619 } else {
620 res = add_cst(res, tok->u.v);
621 }
622 sign = 1;
623 } else if (tok->type == ISL_TOKEN_NAN) {
624 res = isl_pw_aff_add(res, nan_on_domain(space));
625 } else {
626 isl_stream_error(s, tok, "unexpected isl_token");
627 isl_stream_push_token(s, tok);
628 isl_pw_aff_free(res);
629 isl_space_free(space);
630 return NULL;
631 }
632 isl_token_free(tok);
633
634 tok = next_token(s);
635 if (tok && tok->type == '-') {
636 sign = -sign;
637 isl_token_free(tok);
638 } else if (tok && tok->type == '+') {
639 /* nothing */
640 isl_token_free(tok);
641 } else if (tok && tok->type == ISL_TOKEN_VALUE &&
642 isl_int_is_neg(tok->u.v)) {
643 isl_stream_push_token(s, tok);
644 } else {
645 if (tok)
646 isl_stream_push_token(s, tok);
647 break;
648 }
649 }
650
651 isl_space_free(space);
652 return res;
653 error:
654 isl_space_free(space);
655 isl_token_free(tok);
656 isl_pw_aff_free(res);
657 return NULL;
658 }
659
660 static int is_comparator(struct isl_token *tok)
661 {
662 if (!tok)
663 return 0;
664
665 switch (tok->type) {
666 case ISL_TOKEN_LT:
667 case ISL_TOKEN_GT:
668 case ISL_TOKEN_LE:
669 case ISL_TOKEN_GE:
670 case ISL_TOKEN_NE:
671 case '=':
672 return 1;
673 default:
674 return 0;
675 }
676 }
677
678 static __isl_give isl_map *read_formula(__isl_keep isl_stream *s,
679 struct vars *v, __isl_take isl_map *map, int rational);
680 static __isl_give isl_pw_aff *accept_extended_affine(__isl_keep isl_stream *s,
681 __isl_take isl_space *dim, struct vars *v, int rational);
682
683 /* Accept a ternary operator, given the first argument.
684 */
685 static __isl_give isl_pw_aff *accept_ternary(__isl_keep isl_stream *s,
686 __isl_take isl_map *cond, struct vars *v, int rational)
687 {
688 isl_space *dim;
689 isl_pw_aff *pwaff1 = NULL, *pwaff2 = NULL, *pa_cond;
690
691 if (!cond)
692 return NULL;
693
694 if (isl_stream_eat(s, '?'))
695 goto error;
696
697 dim = isl_space_wrap(isl_map_get_space(cond));
698 pwaff1 = accept_extended_affine(s, dim, v, rational);
699 if (!pwaff1)
700 goto error;
701
702 if (isl_stream_eat(s, ':'))
703 goto error;
704
705 dim = isl_pw_aff_get_domain_space(pwaff1);
706 pwaff2 = accept_extended_affine(s, dim, v, rational);
707 if (!pwaff1)
708 goto error;
709
710 pa_cond = isl_set_indicator_function(isl_map_wrap(cond));
711 return isl_pw_aff_cond(pa_cond, pwaff1, pwaff2);
712 error:
713 isl_map_free(cond);
714 isl_pw_aff_free(pwaff1);
715 isl_pw_aff_free(pwaff2);
716 return NULL;
717 }
718
719 /* Set *line and *col to those of the next token, if any.
720 */
721 static void set_current_line_col(__isl_keep isl_stream *s, int *line, int *col)
722 {
723 struct isl_token *tok;
724
725 tok = isl_stream_next_token(s);
726 if (!tok)
727 return;
728
729 *line = tok->line;
730 *col = tok->col;
731 isl_stream_push_token(s, tok);
732 }
733
734 /* Push a token encapsulating "pa" onto "s", with the given
735 * line and column.
736 */
737 static int push_aff(__isl_keep isl_stream *s, int line, int col,
738 __isl_take isl_pw_aff *pa)
739 {
740 struct isl_token *tok;
741
742 tok = isl_token_new(s->ctx, line, col, 0);
743 if (!tok)
744 goto error;
745 tok->type = ISL_TOKEN_AFF;
746 tok->u.pwaff = pa;
747 isl_stream_push_token(s, tok);
748
749 return 0;
750 error:
751 isl_pw_aff_free(pa);
752 return -1;
753 }
754
755 /* Accept an affine expression that may involve ternary operators.
756 * We first read an affine expression.
757 * If it is not followed by a comparison operator, we simply return it.
758 * Otherwise, we assume the affine expression is part of the first
759 * argument of a ternary operator and try to parse that.
760 */
761 static __isl_give isl_pw_aff *accept_extended_affine(__isl_keep isl_stream *s,
762 __isl_take isl_space *dim, struct vars *v, int rational)
763 {
764 isl_space *space;
765 isl_map *cond;
766 isl_pw_aff *pwaff;
767 struct isl_token *tok;
768 int line = -1, col = -1;
769 int is_comp;
770
771 set_current_line_col(s, &line, &col);
772
773 pwaff = accept_affine(s, dim, v);
774 if (rational)
775 pwaff = isl_pw_aff_set_rational(pwaff);
776 if (!pwaff)
777 return NULL;
778
779 tok = isl_stream_next_token(s);
780 if (!tok)
781 return isl_pw_aff_free(pwaff);
782
783 is_comp = is_comparator(tok);
784 isl_stream_push_token(s, tok);
785 if (!is_comp)
786 return pwaff;
787
788 space = isl_pw_aff_get_domain_space(pwaff);
789 cond = isl_map_universe(isl_space_unwrap(space));
790
791 if (push_aff(s, line, col, pwaff) < 0)
792 cond = isl_map_free(cond);
793 if (!cond)
794 return NULL;
795
796 cond = read_formula(s, v, cond, rational);
797
798 return accept_ternary(s, cond, v, rational);
799 }
800
801 static __isl_give isl_map *read_var_def(__isl_keep isl_stream *s,
802 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v,
803 int rational)
804 {
805 isl_pw_aff *def;
806 int pos;
807 isl_map *def_map;
808
809 if (type == isl_dim_param)
810 pos = isl_map_dim(map, isl_dim_param);
811 else {
812 pos = isl_map_dim(map, isl_dim_in);
813 if (type == isl_dim_out)
814 pos += isl_map_dim(map, isl_dim_out);
815 type = isl_dim_in;
816 }
817 --pos;
818
819 def = accept_extended_affine(s, isl_space_wrap(isl_map_get_space(map)),
820 v, rational);
821 def_map = isl_map_from_pw_aff(def);
822 def_map = isl_map_equate(def_map, type, pos, isl_dim_out, 0);
823 def_map = isl_set_unwrap(isl_map_domain(def_map));
824
825 map = isl_map_intersect(map, def_map);
826
827 return map;
828 }
829
830 static __isl_give isl_pw_aff_list *accept_affine_list(__isl_keep isl_stream *s,
831 __isl_take isl_space *dim, struct vars *v)
832 {
833 isl_pw_aff *pwaff;
834 isl_pw_aff_list *list;
835 struct isl_token *tok = NULL;
836
837 pwaff = accept_affine(s, isl_space_copy(dim), v);
838 list = isl_pw_aff_list_from_pw_aff(pwaff);
839 if (!list)
840 goto error;
841
842 for (;;) {
843 tok = isl_stream_next_token(s);
844 if (!tok) {
845 isl_stream_error(s, NULL, "unexpected EOF");
846 goto error;
847 }
848 if (tok->type != ',') {
849 isl_stream_push_token(s, tok);
850 break;
851 }
852 isl_token_free(tok);
853
854 pwaff = accept_affine(s, isl_space_copy(dim), v);
855 list = isl_pw_aff_list_concat(list,
856 isl_pw_aff_list_from_pw_aff(pwaff));
857 if (!list)
858 goto error;
859 }
860
861 isl_space_free(dim);
862 return list;
863 error:
864 isl_space_free(dim);
865 isl_pw_aff_list_free(list);
866 return NULL;
867 }
868
869 static __isl_give isl_map *read_defined_var_list(__isl_keep isl_stream *s,
870 struct vars *v, __isl_take isl_map *map, int rational)
871 {
872 struct isl_token *tok;
873
874 while ((tok = isl_stream_next_token(s)) != NULL) {
875 int p;
876 int n = v->n;
877
878 if (tok->type != ISL_TOKEN_IDENT)
879 break;
880
881 p = vars_pos(v, tok->u.s, -1);
882 if (p < 0)
883 goto error;
884 if (p < n) {
885 isl_stream_error(s, tok, "expecting unique identifier");
886 goto error;
887 }
888
889 map = isl_map_add_dims(map, isl_dim_out, 1);
890
891 isl_token_free(tok);
892 tok = isl_stream_next_token(s);
893 if (tok && tok->type == '=') {
894 isl_token_free(tok);
895 map = read_var_def(s, map, isl_dim_out, v, rational);
896 tok = isl_stream_next_token(s);
897 }
898
899 if (!tok || tok->type != ',')
900 break;
901
902 isl_token_free(tok);
903 }
904 if (tok)
905 isl_stream_push_token(s, tok);
906
907 return map;
908 error:
909 isl_token_free(tok);
910 isl_map_free(map);
911 return NULL;
912 }
913
914 static int next_is_tuple(__isl_keep isl_stream *s)
915 {
916 struct isl_token *tok;
917 int is_tuple;
918
919 tok = isl_stream_next_token(s);
920 if (!tok)
921 return 0;
922 if (tok->type == '[') {
923 isl_stream_push_token(s, tok);
924 return 1;
925 }
926 if (tok->type != ISL_TOKEN_IDENT && !tok->is_keyword) {
927 isl_stream_push_token(s, tok);
928 return 0;
929 }
930
931 is_tuple = isl_stream_next_token_is(s, '[');
932
933 isl_stream_push_token(s, tok);
934
935 return is_tuple;
936 }
937
938 /* Is "pa" an expression in term of earlier dimensions?
939 * The alternative is that the dimension is defined to be equal to itself,
940 * meaning that it has a universe domain and an expression that depends
941 * on itself. "i" is the position of the expression in a sequence
942 * of "n" expressions. The final dimensions of "pa" correspond to
943 * these "n" expressions.
944 */
945 static int pw_aff_is_expr(__isl_keep isl_pw_aff *pa, int i, int n)
946 {
947 isl_aff *aff;
948
949 if (!pa)
950 return -1;
951 if (pa->n != 1)
952 return 1;
953 if (!isl_set_plain_is_universe(pa->p[0].set))
954 return 1;
955
956 aff = pa->p[0].aff;
957 if (isl_int_is_zero(aff->v->el[aff->v->size - n + i]))
958 return 1;
959 return 0;
960 }
961
962 /* Does the tuple contain any dimensions that are defined
963 * in terms of earlier dimensions?
964 */
965 static int tuple_has_expr(__isl_keep isl_multi_pw_aff *tuple)
966 {
967 int i, n;
968 int has_expr = 0;
969 isl_pw_aff *pa;
970
971 if (!tuple)
972 return -1;
973 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
974 for (i = 0; i < n; ++i) {
975 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
976 has_expr = pw_aff_is_expr(pa, i, n);
977 isl_pw_aff_free(pa);
978 if (has_expr < 0 || has_expr)
979 break;
980 }
981
982 return has_expr;
983 }
984
985 /* Set the name of dimension "pos" in "space" to "name".
986 * During printing, we add primes if the same name appears more than once
987 * to distinguish the occurrences. Here, we remove those primes from "name"
988 * before setting the name of the dimension.
989 */
990 static __isl_give isl_space *space_set_dim_name(__isl_take isl_space *space,
991 int pos, char *name)
992 {
993 char *prime;
994
995 if (!name)
996 return space;
997
998 prime = strchr(name, '\'');
999 if (prime)
1000 *prime = '\0';
1001 space = isl_space_set_dim_name(space, isl_dim_out, pos, name);
1002 if (prime)
1003 *prime = '\'';
1004
1005 return space;
1006 }
1007
1008 /* Accept a piecewise affine expression.
1009 *
1010 * At the outer level, the piecewise affine expression may be of the form
1011 *
1012 * aff1 : condition1; aff2 : conditions2; ...
1013 *
1014 * or simply
1015 *
1016 * aff
1017 *
1018 * each of the affine expressions may in turn include ternary operators.
1019 *
1020 * There may be parentheses around some subexpression of "aff1"
1021 * around "aff1" itself, around "aff1 : condition1" and/or
1022 * around the entire piecewise affine expression.
1023 * We therefore remove the opening parenthesis (if any) from the stream
1024 * in case the closing parenthesis follows the colon, but if the closing
1025 * parenthesis is the first thing in the stream after the parsed affine
1026 * expression, we push the parsed expression onto the stream and parse
1027 * again in case the parentheses enclose some subexpression of "aff1".
1028 */
1029 static __isl_give isl_pw_aff *accept_piecewise_affine(__isl_keep isl_stream *s,
1030 __isl_take isl_space *space, struct vars *v, int rational)
1031 {
1032 isl_pw_aff *res;
1033 isl_space *res_space;
1034
1035 res_space = isl_space_from_domain(isl_space_copy(space));
1036 res_space = isl_space_add_dims(res_space, isl_dim_out, 1);
1037 res = isl_pw_aff_empty(res_space);
1038 do {
1039 isl_pw_aff *pa;
1040 int seen_paren;
1041 int line = -1, col = -1;
1042
1043 set_current_line_col(s, &line, &col);
1044 seen_paren = isl_stream_eat_if_available(s, '(');
1045 if (seen_paren)
1046 pa = accept_piecewise_affine(s, isl_space_copy(space),
1047 v, rational);
1048 else
1049 pa = accept_extended_affine(s, isl_space_copy(space),
1050 v, rational);
1051 if (seen_paren && isl_stream_eat_if_available(s, ')')) {
1052 seen_paren = 0;
1053 if (push_aff(s, line, col, pa) < 0)
1054 goto error;
1055 pa = accept_extended_affine(s, isl_space_copy(space),
1056 v, rational);
1057 }
1058 if (isl_stream_eat_if_available(s, ':')) {
1059 isl_space *dom_space;
1060 isl_set *dom;
1061
1062 dom_space = isl_pw_aff_get_domain_space(pa);
1063 dom = isl_set_universe(dom_space);
1064 dom = read_formula(s, v, dom, rational);
1065 pa = isl_pw_aff_intersect_domain(pa, dom);
1066 }
1067
1068 res = isl_pw_aff_union_add(res, pa);
1069
1070 if (seen_paren && isl_stream_eat(s, ')'))
1071 goto error;
1072 } while (isl_stream_eat_if_available(s, ';'));
1073
1074 isl_space_free(space);
1075
1076 return res;
1077 error:
1078 isl_space_free(space);
1079 return isl_pw_aff_free(res);
1080 }
1081
1082 /* Read an affine expression from "s" for use in read_tuple.
1083 *
1084 * accept_extended_affine requires a wrapped space as input.
1085 * read_tuple on the other hand expects each isl_pw_aff
1086 * to have an anonymous space. We therefore adjust the space
1087 * of the isl_pw_aff before returning it.
1088 */
1089 static __isl_give isl_pw_aff *read_tuple_var_def(__isl_keep isl_stream *s,
1090 struct vars *v, int rational)
1091 {
1092 isl_space *space;
1093 isl_pw_aff *def;
1094
1095 space = isl_space_wrap(isl_space_alloc(s->ctx, 0, v->n, 0));
1096
1097 def = accept_piecewise_affine(s, space, v, rational);
1098
1099 space = isl_space_set_alloc(s->ctx, 0, v->n);
1100 def = isl_pw_aff_reset_domain_space(def, space);
1101
1102 return def;
1103 }
1104
1105 /* Read a list of tuple elements by calling "read_el" on each of them and
1106 * return a space with the same number of set dimensions derived from
1107 * the parameter space "space" and possibly updated by "read_el".
1108 * The elements in the list are separated by either "," or "][".
1109 * If "comma" is set then only "," is allowed.
1110 */
1111 static __isl_give isl_space *read_tuple_list(__isl_keep isl_stream *s,
1112 struct vars *v, __isl_take isl_space *space, int rational, int comma,
1113 __isl_give isl_space *(*read_el)(__isl_keep isl_stream *s,
1114 struct vars *v, __isl_take isl_space *space, int rational,
1115 void *user),
1116 void *user)
1117 {
1118 if (!space)
1119 return NULL;
1120
1121 space = isl_space_set_from_params(space);
1122
1123 if (isl_stream_next_token_is(s, ']'))
1124 return space;
1125
1126 for (;;) {
1127 struct isl_token *tok;
1128
1129 space = isl_space_add_dims(space, isl_dim_set, 1);
1130
1131 space = read_el(s, v, space, rational, user);
1132 if (!space)
1133 return NULL;
1134
1135 tok = isl_stream_next_token(s);
1136 if (!comma && tok && tok->type == ']' &&
1137 isl_stream_next_token_is(s, '[')) {
1138 isl_token_free(tok);
1139 tok = isl_stream_next_token(s);
1140 } else if (!tok || tok->type != ',') {
1141 if (tok)
1142 isl_stream_push_token(s, tok);
1143 break;
1144 }
1145
1146 isl_token_free(tok);
1147 }
1148
1149 return space;
1150 }
1151
1152 /* Read a tuple space from "s" derived from the parameter space "space".
1153 * Call "read_el" on each element in the tuples.
1154 */
1155 static __isl_give isl_space *read_tuple_space(__isl_keep isl_stream *s,
1156 struct vars *v, __isl_take isl_space *space, int rational, int comma,
1157 __isl_give isl_space *(*read_el)(__isl_keep isl_stream *s,
1158 struct vars *v, __isl_take isl_space *space, int rational,
1159 void *user),
1160 void *user)
1161 {
1162 struct isl_token *tok;
1163 char *name = NULL;
1164 isl_space *res = NULL;
1165
1166 tok = isl_stream_next_token(s);
1167 if (!tok)
1168 goto error;
1169 if (tok->type == ISL_TOKEN_IDENT || tok->is_keyword) {
1170 name = strdup(tok->u.s);
1171 isl_token_free(tok);
1172 if (!name)
1173 goto error;
1174 } else
1175 isl_stream_push_token(s, tok);
1176 if (isl_stream_eat(s, '['))
1177 goto error;
1178 if (next_is_tuple(s)) {
1179 isl_space *out;
1180 res = read_tuple_space(s, v, isl_space_copy(space),
1181 rational, comma, read_el, user);
1182 if (isl_stream_eat(s, ISL_TOKEN_TO))
1183 goto error;
1184 out = read_tuple_space(s, v, isl_space_copy(space),
1185 rational, comma, read_el, user);
1186 res = isl_space_range_product(res, out);
1187 } else
1188 res = read_tuple_list(s, v, isl_space_copy(space),
1189 rational, comma, read_el, user);
1190 if (isl_stream_eat(s, ']'))
1191 goto error;
1192
1193 if (name) {
1194 res = isl_space_set_tuple_name(res, isl_dim_set, name);
1195 free(name);
1196 }
1197
1198 isl_space_free(space);
1199 return res;
1200 error:
1201 free(name);
1202 isl_space_free(res);
1203 isl_space_free(space);
1204 return NULL;
1205 }
1206
1207 /* Construct an isl_pw_aff defined on a space with v->n variables
1208 * that is equal to the last of those variables.
1209 */
1210 static __isl_give isl_pw_aff *identity_tuple_el(struct vars *v)
1211 {
1212 isl_space *space;
1213 isl_aff *aff;
1214
1215 space = isl_space_set_alloc(v->ctx, 0, v->n);
1216 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
1217 aff = isl_aff_add_coefficient_si(aff, isl_dim_in, v->n - 1, 1);
1218 return isl_pw_aff_from_aff(aff);
1219 }
1220
1221 /* This function is called for each element in a tuple inside read_tuple.
1222 * Add a new variable to "v" and construct a corresponding isl_pw_aff defined
1223 * over a space containing all variables in "v" defined so far.
1224 * The isl_pw_aff expresses the new variable in terms of earlier variables
1225 * if a definition is provided. Otherwise, it is represented as being
1226 * equal to itself.
1227 * Add the isl_pw_aff to *list.
1228 * If the new variable was named, then adjust "space" accordingly and
1229 * return the updated space.
1230 */
1231 static __isl_give isl_space *read_tuple_pw_aff_el(__isl_keep isl_stream *s,
1232 struct vars *v, __isl_take isl_space *space, int rational, void *user)
1233 {
1234 isl_pw_aff_list **list = (isl_pw_aff_list **) user;
1235 isl_pw_aff *pa;
1236 struct isl_token *tok;
1237 int new_name = 0;
1238
1239 tok = next_token(s);
1240 if (!tok) {
1241 isl_stream_error(s, NULL, "unexpected EOF");
1242 return isl_space_free(space);
1243 }
1244
1245 if (tok->type == ISL_TOKEN_IDENT) {
1246 int n = v->n;
1247 int p = vars_pos(v, tok->u.s, -1);
1248 if (p < 0)
1249 goto error;
1250 new_name = p >= n;
1251 }
1252
1253 if (tok->type == '*') {
1254 if (vars_add_anon(v) < 0)
1255 goto error;
1256 isl_token_free(tok);
1257 pa = identity_tuple_el(v);
1258 } else if (new_name) {
1259 int pos = isl_space_dim(space, isl_dim_out) - 1;
1260 space = space_set_dim_name(space, pos, v->v->name);
1261 isl_token_free(tok);
1262 if (isl_stream_eat_if_available(s, '='))
1263 pa = read_tuple_var_def(s, v, rational);
1264 else
1265 pa = identity_tuple_el(v);
1266 } else {
1267 isl_stream_push_token(s, tok);
1268 tok = NULL;
1269 if (vars_add_anon(v) < 0)
1270 goto error;
1271 pa = read_tuple_var_def(s, v, rational);
1272 }
1273
1274 *list = isl_pw_aff_list_add(*list, pa);
1275 if (!*list)
1276 return isl_space_free(space);
1277
1278 return space;
1279 error:
1280 isl_token_free(tok);
1281 return isl_space_free(space);
1282 }
1283
1284 /* Read a tuple and represent it as an isl_multi_pw_aff.
1285 * The range space of the isl_multi_pw_aff is the space of the tuple.
1286 * The domain space is an anonymous space
1287 * with a dimension for each variable in the set of variables in "v",
1288 * including the variables in the range.
1289 * If a given dimension is not defined in terms of earlier dimensions in
1290 * the input, then the corresponding isl_pw_aff is set equal to one time
1291 * the variable corresponding to the dimension being defined.
1292 *
1293 * The elements in the tuple are collected in a list by read_tuple_pw_aff_el.
1294 * Each element in this list is defined over a space representing
1295 * the variables defined so far. We need to adjust the earlier
1296 * elements to have as many variables in the domain as the final
1297 * element in the list.
1298 */
1299 static __isl_give isl_multi_pw_aff *read_tuple(__isl_keep isl_stream *s,
1300 struct vars *v, int rational, int comma)
1301 {
1302 int i, n;
1303 isl_space *space;
1304 isl_pw_aff_list *list;
1305
1306 space = isl_space_params_alloc(v->ctx, 0);
1307 list = isl_pw_aff_list_alloc(s->ctx, 0);
1308 space = read_tuple_space(s, v, space, rational, comma,
1309 &read_tuple_pw_aff_el, &list);
1310 n = isl_space_dim(space, isl_dim_set);
1311 for (i = 0; i + 1 < n; ++i) {
1312 isl_pw_aff *pa;
1313
1314 pa = isl_pw_aff_list_get_pw_aff(list, i);
1315 pa = isl_pw_aff_add_dims(pa, isl_dim_in, n - (i + 1));
1316 list = isl_pw_aff_list_set_pw_aff(list, i, pa);
1317 }
1318
1319 space = isl_space_from_range(space);
1320 space = isl_space_add_dims(space, isl_dim_in, v->n);
1321 return isl_multi_pw_aff_from_pw_aff_list(space, list);
1322 }
1323
1324 /* Add the tuple represented by the isl_multi_pw_aff "tuple" to "map".
1325 * We first create the appropriate space in "map" based on the range
1326 * space of this isl_multi_pw_aff. Then, we add equalities based
1327 * on the affine expressions. These live in an anonymous space,
1328 * however, so we first need to reset the space to that of "map".
1329 */
1330 static __isl_give isl_map *map_from_tuple(__isl_take isl_multi_pw_aff *tuple,
1331 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v,
1332 int rational)
1333 {
1334 int i, n;
1335 isl_ctx *ctx;
1336 isl_space *space = NULL;
1337
1338 if (!map || !tuple)
1339 goto error;
1340 ctx = isl_multi_pw_aff_get_ctx(tuple);
1341 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
1342 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
1343 if (!space)
1344 goto error;
1345
1346 if (type == isl_dim_param) {
1347 if (isl_space_has_tuple_name(space, isl_dim_set) ||
1348 isl_space_is_wrapping(space)) {
1349 isl_die(ctx, isl_error_invalid,
1350 "parameter tuples cannot be named or nested",
1351 goto error);
1352 }
1353 map = isl_map_add_dims(map, type, n);
1354 for (i = 0; i < n; ++i) {
1355 isl_id *id;
1356 if (!isl_space_has_dim_name(space, isl_dim_set, i))
1357 isl_die(ctx, isl_error_invalid,
1358 "parameters must be named",
1359 goto error);
1360 id = isl_space_get_dim_id(space, isl_dim_set, i);
1361 map = isl_map_set_dim_id(map, isl_dim_param, i, id);
1362 }
1363 } else if (type == isl_dim_in) {
1364 isl_set *set;
1365
1366 set = isl_set_universe(isl_space_copy(space));
1367 if (rational)
1368 set = isl_set_set_rational(set);
1369 set = isl_set_intersect_params(set, isl_map_params(map));
1370 map = isl_map_from_domain(set);
1371 } else {
1372 isl_set *set;
1373
1374 set = isl_set_universe(isl_space_copy(space));
1375 if (rational)
1376 set = isl_set_set_rational(set);
1377 map = isl_map_from_domain_and_range(isl_map_domain(map), set);
1378 }
1379
1380 for (i = 0; i < n; ++i) {
1381 isl_pw_aff *pa;
1382 isl_space *space;
1383 isl_aff *aff;
1384 isl_set *set;
1385 isl_map *map_i;
1386
1387 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
1388 space = isl_pw_aff_get_domain_space(pa);
1389 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
1390 aff = isl_aff_add_coefficient_si(aff,
1391 isl_dim_in, v->n - n + i, -1);
1392 pa = isl_pw_aff_add(pa, isl_pw_aff_from_aff(aff));
1393 if (rational)
1394 pa = isl_pw_aff_set_rational(pa);
1395 set = isl_pw_aff_zero_set(pa);
1396 map_i = isl_map_from_range(set);
1397 map_i = isl_map_reset_space(map_i, isl_map_get_space(map));
1398 map = isl_map_intersect(map, map_i);
1399 }
1400
1401 isl_space_free(space);
1402 isl_multi_pw_aff_free(tuple);
1403 return map;
1404 error:
1405 isl_space_free(space);
1406 isl_multi_pw_aff_free(tuple);
1407 isl_map_free(map);
1408 return NULL;
1409 }
1410
1411 /* Read a tuple from "s" and add it to "map".
1412 * The tuple is initially represented as an isl_multi_pw_aff and
1413 * then added to "map".
1414 */
1415 static __isl_give isl_map *read_map_tuple(__isl_keep isl_stream *s,
1416 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v,
1417 int rational, int comma)
1418 {
1419 isl_multi_pw_aff *tuple;
1420
1421 tuple = read_tuple(s, v, rational, comma);
1422 if (!tuple)
1423 return isl_map_free(map);
1424
1425 return map_from_tuple(tuple, map, type, v, rational);
1426 }
1427
1428 static __isl_give isl_set *construct_constraints(
1429 __isl_take isl_set *set, int type,
1430 __isl_keep isl_pw_aff_list *left, __isl_keep isl_pw_aff_list *right,
1431 int rational)
1432 {
1433 isl_set *cond;
1434
1435 left = isl_pw_aff_list_copy(left);
1436 right = isl_pw_aff_list_copy(right);
1437 if (rational) {
1438 left = isl_pw_aff_list_set_rational(left);
1439 right = isl_pw_aff_list_set_rational(right);
1440 }
1441 if (type == ISL_TOKEN_LE)
1442 cond = isl_pw_aff_list_le_set(left, right);
1443 else if (type == ISL_TOKEN_GE)
1444 cond = isl_pw_aff_list_ge_set(left, right);
1445 else if (type == ISL_TOKEN_LT)
1446 cond = isl_pw_aff_list_lt_set(left, right);
1447 else if (type == ISL_TOKEN_GT)
1448 cond = isl_pw_aff_list_gt_set(left, right);
1449 else if (type == ISL_TOKEN_NE)
1450 cond = isl_pw_aff_list_ne_set(left, right);
1451 else
1452 cond = isl_pw_aff_list_eq_set(left, right);
1453
1454 return isl_set_intersect(set, cond);
1455 }
1456
1457 static __isl_give isl_map *add_constraint(__isl_keep isl_stream *s,
1458 struct vars *v, __isl_take isl_map *map, int rational)
1459 {
1460 struct isl_token *tok = NULL;
1461 isl_pw_aff_list *list1 = NULL, *list2 = NULL;
1462 isl_set *set;
1463
1464 set = isl_map_wrap(map);
1465 list1 = accept_affine_list(s, isl_set_get_space(set), v);
1466 if (!list1)
1467 goto error;
1468 tok = isl_stream_next_token(s);
1469 if (!is_comparator(tok)) {
1470 isl_stream_error(s, tok, "missing operator");
1471 if (tok)
1472 isl_stream_push_token(s, tok);
1473 tok = NULL;
1474 goto error;
1475 }
1476 for (;;) {
1477 list2 = accept_affine_list(s, isl_set_get_space(set), v);
1478 if (!list2)
1479 goto error;
1480
1481 set = construct_constraints(set, tok->type, list1, list2,
1482 rational);
1483 isl_token_free(tok);
1484 isl_pw_aff_list_free(list1);
1485 list1 = list2;
1486
1487 tok = isl_stream_next_token(s);
1488 if (!is_comparator(tok)) {
1489 if (tok)
1490 isl_stream_push_token(s, tok);
1491 break;
1492 }
1493 }
1494 isl_pw_aff_list_free(list1);
1495
1496 return isl_set_unwrap(set);
1497 error:
1498 if (tok)
1499 isl_token_free(tok);
1500 isl_pw_aff_list_free(list1);
1501 isl_pw_aff_list_free(list2);
1502 isl_set_free(set);
1503 return NULL;
1504 }
1505
1506 static __isl_give isl_map *read_exists(__isl_keep isl_stream *s,
1507 struct vars *v, __isl_take isl_map *map, int rational)
1508 {
1509 int n = v->n;
1510 int seen_paren = isl_stream_eat_if_available(s, '(');
1511
1512 map = isl_map_from_domain(isl_map_wrap(map));
1513 map = read_defined_var_list(s, v, map, rational);
1514
1515 if (isl_stream_eat(s, ':'))
1516 goto error;
1517
1518 map = read_formula(s, v, map, rational);
1519 map = isl_set_unwrap(isl_map_domain(map));
1520
1521 vars_drop(v, v->n - n);
1522 if (seen_paren && isl_stream_eat(s, ')'))
1523 goto error;
1524
1525 return map;
1526 error:
1527 isl_map_free(map);
1528 return NULL;
1529 }
1530
1531 /* Parse an expression between parentheses and push the result
1532 * back on the stream.
1533 *
1534 * The parsed expression may be either an affine expression
1535 * or a condition. The first type is pushed onto the stream
1536 * as an isl_pw_aff, while the second is pushed as an isl_map.
1537 *
1538 * If the initial token indicates the start of a condition,
1539 * we parse it as such.
1540 * Otherwise, we first parse an affine expression and push
1541 * that onto the stream. If the affine expression covers the
1542 * entire expression between parentheses, we return.
1543 * Otherwise, we assume that the affine expression is the
1544 * start of a condition and continue parsing.
1545 */
1546 static int resolve_paren_expr(__isl_keep isl_stream *s,
1547 struct vars *v, __isl_take isl_map *map, int rational)
1548 {
1549 struct isl_token *tok, *tok2;
1550 int line, col;
1551 isl_pw_aff *pwaff;
1552
1553 tok = isl_stream_next_token(s);
1554 if (!tok || tok->type != '(')
1555 goto error;
1556
1557 if (isl_stream_next_token_is(s, '('))
1558 if (resolve_paren_expr(s, v, isl_map_copy(map), rational))
1559 goto error;
1560
1561 if (isl_stream_next_token_is(s, ISL_TOKEN_EXISTS) ||
1562 isl_stream_next_token_is(s, ISL_TOKEN_NOT) ||
1563 isl_stream_next_token_is(s, ISL_TOKEN_TRUE) ||
1564 isl_stream_next_token_is(s, ISL_TOKEN_FALSE) ||
1565 isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1566 map = read_formula(s, v, map, rational);
1567 if (isl_stream_eat(s, ')'))
1568 goto error;
1569 tok->type = ISL_TOKEN_MAP;
1570 tok->u.map = map;
1571 isl_stream_push_token(s, tok);
1572 return 0;
1573 }
1574
1575 tok2 = isl_stream_next_token(s);
1576 if (!tok2)
1577 goto error;
1578 line = tok2->line;
1579 col = tok2->col;
1580 isl_stream_push_token(s, tok2);
1581
1582 pwaff = accept_affine(s, isl_space_wrap(isl_map_get_space(map)), v);
1583 if (!pwaff)
1584 goto error;
1585
1586 tok2 = isl_token_new(s->ctx, line, col, 0);
1587 if (!tok2)
1588 goto error2;
1589 tok2->type = ISL_TOKEN_AFF;
1590 tok2->u.pwaff = pwaff;
1591
1592 if (isl_stream_eat_if_available(s, ')')) {
1593 isl_stream_push_token(s, tok2);
1594 isl_token_free(tok);
1595 isl_map_free(map);
1596 return 0;
1597 }
1598
1599 isl_stream_push_token(s, tok2);
1600
1601 map = read_formula(s, v, map, rational);
1602 if (isl_stream_eat(s, ')'))
1603 goto error;
1604
1605 tok->type = ISL_TOKEN_MAP;
1606 tok->u.map = map;
1607 isl_stream_push_token(s, tok);
1608
1609 return 0;
1610 error2:
1611 isl_pw_aff_free(pwaff);
1612 error:
1613 isl_token_free(tok);
1614 isl_map_free(map);
1615 return -1;
1616 }
1617
1618 static __isl_give isl_map *read_conjunct(__isl_keep isl_stream *s,
1619 struct vars *v, __isl_take isl_map *map, int rational)
1620 {
1621 if (isl_stream_next_token_is(s, '('))
1622 if (resolve_paren_expr(s, v, isl_map_copy(map), rational))
1623 goto error;
1624
1625 if (isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1626 struct isl_token *tok;
1627 tok = isl_stream_next_token(s);
1628 if (!tok)
1629 goto error;
1630 isl_map_free(map);
1631 map = isl_map_copy(tok->u.map);
1632 isl_token_free(tok);
1633 return map;
1634 }
1635
1636 if (isl_stream_eat_if_available(s, ISL_TOKEN_EXISTS))
1637 return read_exists(s, v, map, rational);
1638
1639 if (isl_stream_eat_if_available(s, ISL_TOKEN_TRUE))
1640 return map;
1641
1642 if (isl_stream_eat_if_available(s, ISL_TOKEN_FALSE)) {
1643 isl_space *dim = isl_map_get_space(map);
1644 isl_map_free(map);
1645 return isl_map_empty(dim);
1646 }
1647
1648 return add_constraint(s, v, map, rational);
1649 error:
1650 isl_map_free(map);
1651 return NULL;
1652 }
1653
1654 static __isl_give isl_map *read_conjuncts(__isl_keep isl_stream *s,
1655 struct vars *v, __isl_take isl_map *map, int rational)
1656 {
1657 isl_map *res;
1658 int negate;
1659
1660 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1661 res = read_conjunct(s, v, isl_map_copy(map), rational);
1662 if (negate)
1663 res = isl_map_subtract(isl_map_copy(map), res);
1664
1665 while (res && isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
1666 isl_map *res_i;
1667
1668 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1669 res_i = read_conjunct(s, v, isl_map_copy(map), rational);
1670 if (negate)
1671 res = isl_map_subtract(res, res_i);
1672 else
1673 res = isl_map_intersect(res, res_i);
1674 }
1675
1676 isl_map_free(map);
1677 return res;
1678 }
1679
1680 static struct isl_map *read_disjuncts(__isl_keep isl_stream *s,
1681 struct vars *v, __isl_take isl_map *map, int rational)
1682 {
1683 isl_map *res;
1684
1685 if (isl_stream_next_token_is(s, '}')) {
1686 isl_space *dim = isl_map_get_space(map);
1687 isl_map_free(map);
1688 return isl_map_universe(dim);
1689 }
1690
1691 res = read_conjuncts(s, v, isl_map_copy(map), rational);
1692 while (isl_stream_eat_if_available(s, ISL_TOKEN_OR)) {
1693 isl_map *res_i;
1694
1695 res_i = read_conjuncts(s, v, isl_map_copy(map), rational);
1696 res = isl_map_union(res, res_i);
1697 }
1698
1699 isl_map_free(map);
1700 return res;
1701 }
1702
1703 /* Read a first order formula from "s", add the corresponding
1704 * constraints to "map" and return the result.
1705 *
1706 * In particular, read a formula of the form
1707 *
1708 * a
1709 *
1710 * or
1711 *
1712 * a implies b
1713 *
1714 * where a and b are disjunctions.
1715 *
1716 * In the first case, map is replaced by
1717 *
1718 * map \cap { [..] : a }
1719 *
1720 * In the second case, it is replaced by
1721 *
1722 * (map \setminus { [..] : a}) \cup (map \cap { [..] : b })
1723 */
1724 static __isl_give isl_map *read_formula(__isl_keep isl_stream *s,
1725 struct vars *v, __isl_take isl_map *map, int rational)
1726 {
1727 isl_map *res;
1728
1729 res = read_disjuncts(s, v, isl_map_copy(map), rational);
1730
1731 if (isl_stream_eat_if_available(s, ISL_TOKEN_IMPLIES)) {
1732 isl_map *res2;
1733
1734 res = isl_map_subtract(isl_map_copy(map), res);
1735 res2 = read_disjuncts(s, v, map, rational);
1736 res = isl_map_union(res, res2);
1737 } else
1738 isl_map_free(map);
1739
1740 return res;
1741 }
1742
1743 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
1744 {
1745 if (pos < isl_basic_map_dim(bmap, isl_dim_out))
1746 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1747 isl_basic_map_dim(bmap, isl_dim_in) + pos;
1748 pos -= isl_basic_map_dim(bmap, isl_dim_out);
1749
1750 if (pos < isl_basic_map_dim(bmap, isl_dim_in))
1751 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
1752 pos -= isl_basic_map_dim(bmap, isl_dim_in);
1753
1754 if (pos < isl_basic_map_dim(bmap, isl_dim_div))
1755 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1756 isl_basic_map_dim(bmap, isl_dim_in) +
1757 isl_basic_map_dim(bmap, isl_dim_out) + pos;
1758 pos -= isl_basic_map_dim(bmap, isl_dim_div);
1759
1760 if (pos < isl_basic_map_dim(bmap, isl_dim_param))
1761 return 1 + pos;
1762
1763 return 0;
1764 }
1765
1766 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
1767 __isl_keep isl_stream *s, __isl_take isl_basic_map *bmap)
1768 {
1769 int j;
1770 struct isl_token *tok;
1771 int type;
1772 int k;
1773 isl_int *c;
1774
1775 if (!bmap)
1776 return NULL;
1777
1778 tok = isl_stream_next_token(s);
1779 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1780 isl_stream_error(s, tok, "expecting coefficient");
1781 if (tok)
1782 isl_stream_push_token(s, tok);
1783 goto error;
1784 }
1785 if (!tok->on_new_line) {
1786 isl_stream_error(s, tok, "coefficient should appear on new line");
1787 isl_stream_push_token(s, tok);
1788 goto error;
1789 }
1790
1791 type = isl_int_get_si(tok->u.v);
1792 isl_token_free(tok);
1793
1794 isl_assert(s->ctx, type == 0 || type == 1, goto error);
1795 if (type == 0) {
1796 k = isl_basic_map_alloc_equality(bmap);
1797 c = bmap->eq[k];
1798 } else {
1799 k = isl_basic_map_alloc_inequality(bmap);
1800 c = bmap->ineq[k];
1801 }
1802 if (k < 0)
1803 goto error;
1804
1805 for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
1806 int pos;
1807 tok = isl_stream_next_token(s);
1808 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1809 isl_stream_error(s, tok, "expecting coefficient");
1810 if (tok)
1811 isl_stream_push_token(s, tok);
1812 goto error;
1813 }
1814 if (tok->on_new_line) {
1815 isl_stream_error(s, tok,
1816 "coefficient should not appear on new line");
1817 isl_stream_push_token(s, tok);
1818 goto error;
1819 }
1820 pos = polylib_pos_to_isl_pos(bmap, j);
1821 isl_int_set(c[pos], tok->u.v);
1822 isl_token_free(tok);
1823 }
1824
1825 return bmap;
1826 error:
1827 isl_basic_map_free(bmap);
1828 return NULL;
1829 }
1830
1831 static __isl_give isl_basic_map *basic_map_read_polylib(
1832 __isl_keep isl_stream *s)
1833 {
1834 int i;
1835 struct isl_token *tok;
1836 struct isl_token *tok2;
1837 int n_row, n_col;
1838 int on_new_line;
1839 unsigned in = 0, out, local = 0;
1840 struct isl_basic_map *bmap = NULL;
1841 int nparam = 0;
1842
1843 tok = isl_stream_next_token(s);
1844 if (!tok) {
1845 isl_stream_error(s, NULL, "unexpected EOF");
1846 return NULL;
1847 }
1848 tok2 = isl_stream_next_token(s);
1849 if (!tok2) {
1850 isl_token_free(tok);
1851 isl_stream_error(s, NULL, "unexpected EOF");
1852 return NULL;
1853 }
1854 if (tok->type != ISL_TOKEN_VALUE || tok2->type != ISL_TOKEN_VALUE) {
1855 isl_stream_push_token(s, tok2);
1856 isl_stream_push_token(s, tok);
1857 isl_stream_error(s, NULL,
1858 "expecting constraint matrix dimensions");
1859 return NULL;
1860 }
1861 n_row = isl_int_get_si(tok->u.v);
1862 n_col = isl_int_get_si(tok2->u.v);
1863 on_new_line = tok2->on_new_line;
1864 isl_token_free(tok2);
1865 isl_token_free(tok);
1866 isl_assert(s->ctx, !on_new_line, return NULL);
1867 isl_assert(s->ctx, n_row >= 0, return NULL);
1868 isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
1869 tok = isl_stream_next_token_on_same_line(s);
1870 if (tok) {
1871 if (tok->type != ISL_TOKEN_VALUE) {
1872 isl_stream_error(s, tok,
1873 "expecting number of output dimensions");
1874 isl_stream_push_token(s, tok);
1875 goto error;
1876 }
1877 out = isl_int_get_si(tok->u.v);
1878 isl_token_free(tok);
1879
1880 tok = isl_stream_next_token_on_same_line(s);
1881 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1882 isl_stream_error(s, tok,
1883 "expecting number of input dimensions");
1884 if (tok)
1885 isl_stream_push_token(s, tok);
1886 goto error;
1887 }
1888 in = isl_int_get_si(tok->u.v);
1889 isl_token_free(tok);
1890
1891 tok = isl_stream_next_token_on_same_line(s);
1892 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1893 isl_stream_error(s, tok,
1894 "expecting number of existentials");
1895 if (tok)
1896 isl_stream_push_token(s, tok);
1897 goto error;
1898 }
1899 local = isl_int_get_si(tok->u.v);
1900 isl_token_free(tok);
1901
1902 tok = isl_stream_next_token_on_same_line(s);
1903 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1904 isl_stream_error(s, tok,
1905 "expecting number of parameters");
1906 if (tok)
1907 isl_stream_push_token(s, tok);
1908 goto error;
1909 }
1910 nparam = isl_int_get_si(tok->u.v);
1911 isl_token_free(tok);
1912 if (n_col != 1 + out + in + local + nparam + 1) {
1913 isl_stream_error(s, NULL,
1914 "dimensions don't match");
1915 goto error;
1916 }
1917 } else
1918 out = n_col - 2 - nparam;
1919 bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
1920 if (!bmap)
1921 return NULL;
1922
1923 for (i = 0; i < local; ++i) {
1924 int k = isl_basic_map_alloc_div(bmap);
1925 if (k < 0)
1926 goto error;
1927 isl_seq_clr(bmap->div[k], 1 + 1 + nparam + in + out + local);
1928 }
1929
1930 for (i = 0; i < n_row; ++i)
1931 bmap = basic_map_read_polylib_constraint(s, bmap);
1932
1933 tok = isl_stream_next_token_on_same_line(s);
1934 if (tok) {
1935 isl_stream_error(s, tok, "unexpected extra token on line");
1936 isl_stream_push_token(s, tok);
1937 goto error;
1938 }
1939
1940 bmap = isl_basic_map_simplify(bmap);
1941 bmap = isl_basic_map_finalize(bmap);
1942 return bmap;
1943 error:
1944 isl_basic_map_free(bmap);
1945 return NULL;
1946 }
1947
1948 static struct isl_map *map_read_polylib(__isl_keep isl_stream *s)
1949 {
1950 struct isl_token *tok;
1951 struct isl_token *tok2;
1952 int i, n;
1953 struct isl_map *map;
1954
1955 tok = isl_stream_next_token(s);
1956 if (!tok) {
1957 isl_stream_error(s, NULL, "unexpected EOF");
1958 return NULL;
1959 }
1960 tok2 = isl_stream_next_token_on_same_line(s);
1961 if (tok2 && tok2->type == ISL_TOKEN_VALUE) {
1962 isl_stream_push_token(s, tok2);
1963 isl_stream_push_token(s, tok);
1964 return isl_map_from_basic_map(basic_map_read_polylib(s));
1965 }
1966 if (tok2) {
1967 isl_stream_error(s, tok2, "unexpected token");
1968 isl_stream_push_token(s, tok2);
1969 isl_stream_push_token(s, tok);
1970 return NULL;
1971 }
1972 n = isl_int_get_si(tok->u.v);
1973 isl_token_free(tok);
1974
1975 isl_assert(s->ctx, n >= 1, return NULL);
1976
1977 map = isl_map_from_basic_map(basic_map_read_polylib(s));
1978
1979 for (i = 1; map && i < n; ++i)
1980 map = isl_map_union(map,
1981 isl_map_from_basic_map(basic_map_read_polylib(s)));
1982
1983 return map;
1984 }
1985
1986 static int optional_power(__isl_keep isl_stream *s)
1987 {
1988 int pow;
1989 struct isl_token *tok;
1990
1991 tok = isl_stream_next_token(s);
1992 if (!tok)
1993 return 1;
1994 if (tok->type != '^') {
1995 isl_stream_push_token(s, tok);
1996 return 1;
1997 }
1998 isl_token_free(tok);
1999 tok = isl_stream_next_token(s);
2000 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2001 isl_stream_error(s, tok, "expecting exponent");
2002 if (tok)
2003 isl_stream_push_token(s, tok);
2004 return 1;
2005 }
2006 pow = isl_int_get_si(tok->u.v);
2007 isl_token_free(tok);
2008 return pow;
2009 }
2010
2011 static __isl_give isl_pw_qpolynomial *read_term(__isl_keep isl_stream *s,
2012 __isl_keep isl_map *map, struct vars *v);
2013
2014 static __isl_give isl_pw_qpolynomial *read_factor(__isl_keep isl_stream *s,
2015 __isl_keep isl_map *map, struct vars *v)
2016 {
2017 isl_pw_qpolynomial *pwqp;
2018 struct isl_token *tok;
2019
2020 tok = next_token(s);
2021 if (!tok) {
2022 isl_stream_error(s, NULL, "unexpected EOF");
2023 return NULL;
2024 }
2025 if (tok->type == '(') {
2026 int pow;
2027
2028 isl_token_free(tok);
2029 pwqp = read_term(s, map, v);
2030 if (!pwqp)
2031 return NULL;
2032 if (isl_stream_eat(s, ')'))
2033 goto error;
2034 pow = optional_power(s);
2035 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
2036 } else if (tok->type == ISL_TOKEN_VALUE) {
2037 struct isl_token *tok2;
2038 isl_qpolynomial *qp;
2039
2040 tok2 = isl_stream_next_token(s);
2041 if (tok2 && tok2->type == '/') {
2042 isl_token_free(tok2);
2043 tok2 = next_token(s);
2044 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
2045 isl_stream_error(s, tok2, "expected denominator");
2046 isl_token_free(tok);
2047 isl_token_free(tok2);
2048 return NULL;
2049 }
2050 qp = isl_qpolynomial_rat_cst_on_domain(isl_map_get_space(map),
2051 tok->u.v, tok2->u.v);
2052 isl_token_free(tok2);
2053 } else {
2054 isl_stream_push_token(s, tok2);
2055 qp = isl_qpolynomial_cst_on_domain(isl_map_get_space(map),
2056 tok->u.v);
2057 }
2058 isl_token_free(tok);
2059 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
2060 } else if (tok->type == ISL_TOKEN_INFTY) {
2061 isl_qpolynomial *qp;
2062 isl_token_free(tok);
2063 qp = isl_qpolynomial_infty_on_domain(isl_map_get_space(map));
2064 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
2065 } else if (tok->type == ISL_TOKEN_NAN) {
2066 isl_qpolynomial *qp;
2067 isl_token_free(tok);
2068 qp = isl_qpolynomial_nan_on_domain(isl_map_get_space(map));
2069 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
2070 } else if (tok->type == ISL_TOKEN_IDENT) {
2071 int n = v->n;
2072 int pos = vars_pos(v, tok->u.s, -1);
2073 int pow;
2074 isl_qpolynomial *qp;
2075 if (pos < 0) {
2076 isl_token_free(tok);
2077 return NULL;
2078 }
2079 if (pos >= n) {
2080 vars_drop(v, v->n - n);
2081 isl_stream_error(s, tok, "unknown identifier");
2082 isl_token_free(tok);
2083 return NULL;
2084 }
2085 isl_token_free(tok);
2086 pow = optional_power(s);
2087 qp = isl_qpolynomial_var_pow_on_domain(isl_map_get_space(map), pos, pow);
2088 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
2089 } else if (is_start_of_div(tok)) {
2090 isl_pw_aff *pwaff;
2091 int pow;
2092
2093 isl_stream_push_token(s, tok);
2094 pwaff = accept_div(s, isl_map_get_space(map), v);
2095 pow = optional_power(s);
2096 pwqp = isl_pw_qpolynomial_from_pw_aff(pwaff);
2097 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
2098 } else if (tok->type == '-') {
2099 isl_token_free(tok);
2100 pwqp = read_factor(s, map, v);
2101 pwqp = isl_pw_qpolynomial_neg(pwqp);
2102 } else {
2103 isl_stream_error(s, tok, "unexpected isl_token");
2104 isl_stream_push_token(s, tok);
2105 return NULL;
2106 }
2107
2108 if (isl_stream_eat_if_available(s, '*') ||
2109 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
2110 isl_pw_qpolynomial *pwqp2;
2111
2112 pwqp2 = read_factor(s, map, v);
2113 pwqp = isl_pw_qpolynomial_mul(pwqp, pwqp2);
2114 }
2115
2116 return pwqp;
2117 error:
2118 isl_pw_qpolynomial_free(pwqp);
2119 return NULL;
2120 }
2121
2122 static __isl_give isl_pw_qpolynomial *read_term(__isl_keep isl_stream *s,
2123 __isl_keep isl_map *map, struct vars *v)
2124 {
2125 struct isl_token *tok;
2126 isl_pw_qpolynomial *pwqp;
2127
2128 pwqp = read_factor(s, map, v);
2129
2130 for (;;) {
2131 tok = next_token(s);
2132 if (!tok)
2133 return pwqp;
2134
2135 if (tok->type == '+') {
2136 isl_pw_qpolynomial *pwqp2;
2137
2138 isl_token_free(tok);
2139 pwqp2 = read_factor(s, map, v);
2140 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
2141 } else if (tok->type == '-') {
2142 isl_pw_qpolynomial *pwqp2;
2143
2144 isl_token_free(tok);
2145 pwqp2 = read_factor(s, map, v);
2146 pwqp = isl_pw_qpolynomial_sub(pwqp, pwqp2);
2147 } else if (tok->type == ISL_TOKEN_VALUE &&
2148 isl_int_is_neg(tok->u.v)) {
2149 isl_pw_qpolynomial *pwqp2;
2150
2151 isl_stream_push_token(s, tok);
2152 pwqp2 = read_factor(s, map, v);
2153 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
2154 } else {
2155 isl_stream_push_token(s, tok);
2156 break;
2157 }
2158 }
2159
2160 return pwqp;
2161 }
2162
2163 static __isl_give isl_map *read_optional_formula(__isl_keep isl_stream *s,
2164 __isl_take isl_map *map, struct vars *v, int rational)
2165 {
2166 struct isl_token *tok;
2167
2168 tok = isl_stream_next_token(s);
2169 if (!tok) {
2170 isl_stream_error(s, NULL, "unexpected EOF");
2171 goto error;
2172 }
2173 if (tok->type == ':' ||
2174 (tok->type == ISL_TOKEN_OR && !strcmp(tok->u.s, "|"))) {
2175 isl_token_free(tok);
2176 map = read_formula(s, v, map, rational);
2177 } else
2178 isl_stream_push_token(s, tok);
2179
2180 return map;
2181 error:
2182 isl_map_free(map);
2183 return NULL;
2184 }
2185
2186 static struct isl_obj obj_read_poly(__isl_keep isl_stream *s,
2187 __isl_take isl_map *map, struct vars *v, int n)
2188 {
2189 struct isl_obj obj = { isl_obj_pw_qpolynomial, NULL };
2190 isl_pw_qpolynomial *pwqp;
2191 struct isl_set *set;
2192
2193 pwqp = read_term(s, map, v);
2194 map = read_optional_formula(s, map, v, 0);
2195 set = isl_map_range(map);
2196
2197 pwqp = isl_pw_qpolynomial_intersect_domain(pwqp, set);
2198
2199 vars_drop(v, v->n - n);
2200
2201 obj.v = pwqp;
2202 return obj;
2203 }
2204
2205 static struct isl_obj obj_read_poly_or_fold(__isl_keep isl_stream *s,
2206 __isl_take isl_set *set, struct vars *v, int n)
2207 {
2208 struct isl_obj obj = { isl_obj_pw_qpolynomial_fold, NULL };
2209 isl_pw_qpolynomial *pwqp;
2210 isl_pw_qpolynomial_fold *pwf = NULL;
2211
2212 if (!isl_stream_eat_if_available(s, ISL_TOKEN_MAX))
2213 return obj_read_poly(s, set, v, n);
2214
2215 if (isl_stream_eat(s, '('))
2216 goto error;
2217
2218 pwqp = read_term(s, set, v);
2219 pwf = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max, pwqp);
2220
2221 while (isl_stream_eat_if_available(s, ',')) {
2222 isl_pw_qpolynomial_fold *pwf_i;
2223 pwqp = read_term(s, set, v);
2224 pwf_i = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max,
2225 pwqp);
2226 pwf = isl_pw_qpolynomial_fold_fold(pwf, pwf_i);
2227 }
2228
2229 if (isl_stream_eat(s, ')'))
2230 goto error;
2231
2232 set = read_optional_formula(s, set, v, 0);
2233 pwf = isl_pw_qpolynomial_fold_intersect_domain(pwf, set);
2234
2235 vars_drop(v, v->n - n);
2236
2237 obj.v = pwf;
2238 return obj;
2239 error:
2240 isl_set_free(set);
2241 isl_pw_qpolynomial_fold_free(pwf);
2242 obj.type = isl_obj_none;
2243 return obj;
2244 }
2245
2246 static int is_rational(__isl_keep isl_stream *s)
2247 {
2248 struct isl_token *tok;
2249
2250 tok = isl_stream_next_token(s);
2251 if (!tok)
2252 return 0;
2253 if (tok->type == ISL_TOKEN_RAT && isl_stream_next_token_is(s, ':')) {
2254 isl_token_free(tok);
2255 isl_stream_eat(s, ':');
2256 return 1;
2257 }
2258
2259 isl_stream_push_token(s, tok);
2260
2261 return 0;
2262 }
2263
2264 static struct isl_obj obj_read_body(__isl_keep isl_stream *s,
2265 __isl_take isl_map *map, struct vars *v)
2266 {
2267 struct isl_token *tok;
2268 struct isl_obj obj = { isl_obj_set, NULL };
2269 int n = v->n;
2270 int rational;
2271
2272 rational = is_rational(s);
2273 if (rational)
2274 map = isl_map_set_rational(map);
2275
2276 if (isl_stream_next_token_is(s, ':')) {
2277 obj.type = isl_obj_set;
2278 obj.v = read_optional_formula(s, map, v, rational);
2279 return obj;
2280 }
2281
2282 if (!next_is_tuple(s))
2283 return obj_read_poly_or_fold(s, map, v, n);
2284
2285 map = read_map_tuple(s, map, isl_dim_in, v, rational, 0);
2286 if (!map)
2287 goto error;
2288 tok = isl_stream_next_token(s);
2289 if (!tok)
2290 goto error;
2291 if (tok->type == ISL_TOKEN_TO) {
2292 obj.type = isl_obj_map;
2293 isl_token_free(tok);
2294 if (!next_is_tuple(s)) {
2295 isl_set *set = isl_map_domain(map);
2296 return obj_read_poly_or_fold(s, set, v, n);
2297 }
2298 map = read_map_tuple(s, map, isl_dim_out, v, rational, 0);
2299 if (!map)
2300 goto error;
2301 } else {
2302 map = isl_map_domain(map);
2303 isl_stream_push_token(s, tok);
2304 }
2305
2306 map = read_optional_formula(s, map, v, rational);
2307
2308 vars_drop(v, v->n - n);
2309
2310 obj.v = map;
2311 return obj;
2312 error:
2313 isl_map_free(map);
2314 obj.type = isl_obj_none;
2315 return obj;
2316 }
2317
2318 static struct isl_obj to_union(isl_ctx *ctx, struct isl_obj obj)
2319 {
2320 if (obj.type == isl_obj_map) {
2321 obj.v = isl_union_map_from_map(obj.v);
2322 obj.type = isl_obj_union_map;
2323 } else if (obj.type == isl_obj_set) {
2324 obj.v = isl_union_set_from_set(obj.v);
2325 obj.type = isl_obj_union_set;
2326 } else if (obj.type == isl_obj_pw_qpolynomial) {
2327 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
2328 obj.type = isl_obj_union_pw_qpolynomial;
2329 } else if (obj.type == isl_obj_pw_qpolynomial_fold) {
2330 obj.v = isl_union_pw_qpolynomial_fold_from_pw_qpolynomial_fold(obj.v);
2331 obj.type = isl_obj_union_pw_qpolynomial_fold;
2332 } else
2333 isl_assert(ctx, 0, goto error);
2334 return obj;
2335 error:
2336 obj.type->free(obj.v);
2337 obj.type = isl_obj_none;
2338 return obj;
2339 }
2340
2341 static struct isl_obj obj_add(__isl_keep isl_stream *s,
2342 struct isl_obj obj1, struct isl_obj obj2)
2343 {
2344 if (obj1.type == isl_obj_set && obj2.type == isl_obj_union_set)
2345 obj1 = to_union(s->ctx, obj1);
2346 if (obj1.type == isl_obj_union_set && obj2.type == isl_obj_set)
2347 obj2 = to_union(s->ctx, obj2);
2348 if (obj1.type == isl_obj_map && obj2.type == isl_obj_union_map)
2349 obj1 = to_union(s->ctx, obj1);
2350 if (obj1.type == isl_obj_union_map && obj2.type == isl_obj_map)
2351 obj2 = to_union(s->ctx, obj2);
2352 if (obj1.type == isl_obj_pw_qpolynomial &&
2353 obj2.type == isl_obj_union_pw_qpolynomial)
2354 obj1 = to_union(s->ctx, obj1);
2355 if (obj1.type == isl_obj_union_pw_qpolynomial &&
2356 obj2.type == isl_obj_pw_qpolynomial)
2357 obj2 = to_union(s->ctx, obj2);
2358 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
2359 obj2.type == isl_obj_union_pw_qpolynomial_fold)
2360 obj1 = to_union(s->ctx, obj1);
2361 if (obj1.type == isl_obj_union_pw_qpolynomial_fold &&
2362 obj2.type == isl_obj_pw_qpolynomial_fold)
2363 obj2 = to_union(s->ctx, obj2);
2364 if (obj1.type != obj2.type) {
2365 isl_stream_error(s, NULL,
2366 "attempt to combine incompatible objects");
2367 goto error;
2368 }
2369 if (!obj1.type->add)
2370 isl_die(s->ctx, isl_error_internal,
2371 "combination not supported on object type", goto error);
2372 if (obj1.type == isl_obj_map && !isl_map_has_equal_space(obj1.v, obj2.v)) {
2373 obj1 = to_union(s->ctx, obj1);
2374 obj2 = to_union(s->ctx, obj2);
2375 }
2376 if (obj1.type == isl_obj_set && !isl_set_has_equal_space(obj1.v, obj2.v)) {
2377 obj1 = to_union(s->ctx, obj1);
2378 obj2 = to_union(s->ctx, obj2);
2379 }
2380 if (obj1.type == isl_obj_pw_qpolynomial &&
2381 !isl_pw_qpolynomial_has_equal_space(obj1.v, obj2.v)) {
2382 obj1 = to_union(s->ctx, obj1);
2383 obj2 = to_union(s->ctx, obj2);
2384 }
2385 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
2386 !isl_pw_qpolynomial_fold_has_equal_space(obj1.v, obj2.v)) {
2387 obj1 = to_union(s->ctx, obj1);
2388 obj2 = to_union(s->ctx, obj2);
2389 }
2390 obj1.v = obj1.type->add(obj1.v, obj2.v);
2391 return obj1;
2392 error:
2393 obj1.type->free(obj1.v);
2394 obj2.type->free(obj2.v);
2395 obj1.type = isl_obj_none;
2396 obj1.v = NULL;
2397 return obj1;
2398 }
2399
2400 /* Are the first two tokens on "s", "domain" (either as a string
2401 * or as an identifier) followed by ":"?
2402 */
2403 static int next_is_domain_colon(__isl_keep isl_stream *s)
2404 {
2405 struct isl_token *tok;
2406 char *name;
2407 int res;
2408
2409 tok = isl_stream_next_token(s);
2410 if (!tok)
2411 return 0;
2412 if (tok->type != ISL_TOKEN_IDENT && tok->type != ISL_TOKEN_STRING) {
2413 isl_stream_push_token(s, tok);
2414 return 0;
2415 }
2416
2417 name = isl_token_get_str(s->ctx, tok);
2418 res = !strcmp(name, "domain") && isl_stream_next_token_is(s, ':');
2419 free(name);
2420
2421 isl_stream_push_token(s, tok);
2422
2423 return res;
2424 }
2425
2426 /* Do the first tokens on "s" look like a schedule?
2427 *
2428 * The root of a schedule is always a domain node, so the first thing
2429 * we expect in the stream is a domain key, i.e., "domain" followed
2430 * by ":". If the schedule was printed in YAML flow style, then
2431 * we additionally expect a "{" to open the outer mapping.
2432 */
2433 static int next_is_schedule(__isl_keep isl_stream *s)
2434 {
2435 struct isl_token *tok;
2436 int is_schedule;
2437
2438 tok = isl_stream_next_token(s);
2439 if (!tok)
2440 return 0;
2441 if (tok->type != '{') {
2442 isl_stream_push_token(s, tok);
2443 return next_is_domain_colon(s);
2444 }
2445
2446 is_schedule = next_is_domain_colon(s);
2447 isl_stream_push_token(s, tok);
2448
2449 return is_schedule;
2450 }
2451
2452 /* Read an isl_schedule from "s" and store it in an isl_obj.
2453 */
2454 static struct isl_obj schedule_read(__isl_keep isl_stream *s)
2455 {
2456 struct isl_obj obj;
2457
2458 obj.type = isl_obj_schedule;
2459 obj.v = isl_stream_read_schedule(s);
2460
2461 return obj;
2462 }
2463
2464 static struct isl_obj obj_read(__isl_keep isl_stream *s)
2465 {
2466 isl_map *map = NULL;
2467 struct isl_token *tok;
2468 struct vars *v = NULL;
2469 struct isl_obj obj = { isl_obj_set, NULL };
2470
2471 if (next_is_schedule(s))
2472 return schedule_read(s);
2473
2474 tok = next_token(s);
2475 if (!tok) {
2476 isl_stream_error(s, NULL, "unexpected EOF");
2477 goto error;
2478 }
2479 if (tok->type == ISL_TOKEN_VALUE) {
2480 struct isl_token *tok2;
2481 struct isl_map *map;
2482
2483 tok2 = isl_stream_next_token(s);
2484 if (!tok2 || tok2->type != ISL_TOKEN_VALUE ||
2485 isl_int_is_neg(tok2->u.v)) {
2486 if (tok2)
2487 isl_stream_push_token(s, tok2);
2488 obj.type = isl_obj_val;
2489 obj.v = isl_val_int_from_isl_int(s->ctx, tok->u.v);
2490 isl_token_free(tok);
2491 return obj;
2492 }
2493 isl_stream_push_token(s, tok2);
2494 isl_stream_push_token(s, tok);
2495 map = map_read_polylib(s);
2496 if (!map)
2497 goto error;
2498 if (isl_map_may_be_set(map))
2499 obj.v = isl_map_range(map);
2500 else {
2501 obj.type = isl_obj_map;
2502 obj.v = map;
2503 }
2504 return obj;
2505 }
2506 v = vars_new(s->ctx);
2507 if (!v) {
2508 isl_stream_push_token(s, tok);
2509 goto error;
2510 }
2511 map = isl_map_universe(isl_space_params_alloc(s->ctx, 0));
2512 if (tok->type == '[') {
2513 isl_stream_push_token(s, tok);
2514 map = read_map_tuple(s, map, isl_dim_param, v, 0, 0);
2515 if (!map)
2516 goto error;
2517 tok = isl_stream_next_token(s);
2518 if (!tok || tok->type != ISL_TOKEN_TO) {
2519 isl_stream_error(s, tok, "expecting '->'");
2520 if (tok)
2521 isl_stream_push_token(s, tok);
2522 goto error;
2523 }
2524 isl_token_free(tok);
2525 tok = isl_stream_next_token(s);
2526 }
2527 if (!tok || tok->type != '{') {
2528 isl_stream_error(s, tok, "expecting '{'");
2529 if (tok)
2530 isl_stream_push_token(s, tok);
2531 goto error;
2532 }
2533 isl_token_free(tok);
2534
2535 tok = isl_stream_next_token(s);
2536 if (!tok)
2537 ;
2538 else if (tok->type == ISL_TOKEN_IDENT && !strcmp(tok->u.s, "Sym")) {
2539 isl_token_free(tok);
2540 if (isl_stream_eat(s, '='))
2541 goto error;
2542 map = read_map_tuple(s, map, isl_dim_param, v, 0, 1);
2543 if (!map)
2544 goto error;
2545 } else if (tok->type == '}') {
2546 obj.type = isl_obj_union_set;
2547 obj.v = isl_union_set_empty(isl_map_get_space(map));
2548 isl_token_free(tok);
2549 goto done;
2550 } else
2551 isl_stream_push_token(s, tok);
2552
2553 for (;;) {
2554 struct isl_obj o;
2555 tok = NULL;
2556 o = obj_read_body(s, isl_map_copy(map), v);
2557 if (o.type == isl_obj_none || !o.v)
2558 goto error;
2559 if (!obj.v)
2560 obj = o;
2561 else {
2562 obj = obj_add(s, obj, o);
2563 if (obj.type == isl_obj_none || !obj.v)
2564 goto error;
2565 }
2566 tok = isl_stream_next_token(s);
2567 if (!tok || tok->type != ';')
2568 break;
2569 isl_token_free(tok);
2570 if (isl_stream_next_token_is(s, '}')) {
2571 tok = isl_stream_next_token(s);
2572 break;
2573 }
2574 }
2575
2576 if (tok && tok->type == '}') {
2577 isl_token_free(tok);
2578 } else {
2579 isl_stream_error(s, tok, "unexpected isl_token");
2580 if (tok)
2581 isl_token_free(tok);
2582 goto error;
2583 }
2584 done:
2585 vars_free(v);
2586 isl_map_free(map);
2587
2588 return obj;
2589 error:
2590 isl_map_free(map);
2591 obj.type->free(obj.v);
2592 if (v)
2593 vars_free(v);
2594 obj.v = NULL;
2595 return obj;
2596 }
2597
2598 struct isl_obj isl_stream_read_obj(__isl_keep isl_stream *s)
2599 {
2600 return obj_read(s);
2601 }
2602
2603 __isl_give isl_map *isl_stream_read_map(__isl_keep isl_stream *s)
2604 {
2605 struct isl_obj obj;
2606
2607 obj = obj_read(s);
2608 if (obj.v)
2609 isl_assert(s->ctx, obj.type == isl_obj_map ||
2610 obj.type == isl_obj_set, goto error);
2611
2612 if (obj.type == isl_obj_set)
2613 obj.v = isl_map_from_range(obj.v);
2614
2615 return obj.v;
2616 error:
2617 obj.type->free(obj.v);
2618 return NULL;
2619 }
2620
2621 __isl_give isl_set *isl_stream_read_set(__isl_keep isl_stream *s)
2622 {
2623 struct isl_obj obj;
2624
2625 obj = obj_read(s);
2626 if (obj.v) {
2627 if (obj.type == isl_obj_map && isl_map_may_be_set(obj.v)) {
2628 obj.v = isl_map_range(obj.v);
2629 obj.type = isl_obj_set;
2630 }
2631 isl_assert(s->ctx, obj.type == isl_obj_set, goto error);
2632 }
2633
2634 return obj.v;
2635 error:
2636 obj.type->free(obj.v);
2637 return NULL;
2638 }
2639
2640 __isl_give isl_union_map *isl_stream_read_union_map(__isl_keep isl_stream *s)
2641 {
2642 struct isl_obj obj;
2643
2644 obj = obj_read(s);
2645 if (obj.type == isl_obj_map) {
2646 obj.type = isl_obj_union_map;
2647 obj.v = isl_union_map_from_map(obj.v);
2648 }
2649 if (obj.type == isl_obj_set) {
2650 obj.type = isl_obj_union_set;
2651 obj.v = isl_union_set_from_set(obj.v);
2652 }
2653 if (obj.v && obj.type == isl_obj_union_set &&
2654 isl_union_set_is_empty(obj.v))
2655 obj.type = isl_obj_union_map;
2656 if (obj.v && obj.type != isl_obj_union_map)
2657 isl_die(s->ctx, isl_error_invalid, "invalid input", goto error);
2658
2659 return obj.v;
2660 error:
2661 obj.type->free(obj.v);
2662 return NULL;
2663 }
2664
2665 __isl_give isl_union_set *isl_stream_read_union_set(__isl_keep isl_stream *s)
2666 {
2667 struct isl_obj obj;
2668
2669 obj = obj_read(s);
2670 if (obj.type == isl_obj_set) {
2671 obj.type = isl_obj_union_set;
2672 obj.v = isl_union_set_from_set(obj.v);
2673 }
2674 if (obj.v)
2675 isl_assert(s->ctx, obj.type == isl_obj_union_set, goto error);
2676
2677 return obj.v;
2678 error:
2679 obj.type->free(obj.v);
2680 return NULL;
2681 }
2682
2683 static __isl_give isl_basic_map *basic_map_read(__isl_keep isl_stream *s)
2684 {
2685 struct isl_obj obj;
2686 struct isl_map *map;
2687 struct isl_basic_map *bmap;
2688
2689 obj = obj_read(s);
2690 if (obj.v && (obj.type != isl_obj_map && obj.type != isl_obj_set))
2691 isl_die(s->ctx, isl_error_invalid, "not a (basic) set or map",
2692 goto error);
2693 map = obj.v;
2694 if (!map)
2695 return NULL;
2696
2697 if (map->n > 1)
2698 isl_die(s->ctx, isl_error_invalid,
2699 "set or map description involves "
2700 "more than one disjunct", goto error);
2701
2702 if (map->n == 0)
2703 bmap = isl_basic_map_empty_like_map(map);
2704 else
2705 bmap = isl_basic_map_copy(map->p[0]);
2706
2707 isl_map_free(map);
2708
2709 return bmap;
2710 error:
2711 obj.type->free(obj.v);
2712 return NULL;
2713 }
2714
2715 static __isl_give isl_basic_set *basic_set_read(__isl_keep isl_stream *s)
2716 {
2717 isl_basic_map *bmap;
2718 bmap = basic_map_read(s);
2719 if (!bmap)
2720 return NULL;
2721 if (!isl_basic_map_may_be_set(bmap))
2722 isl_die(s->ctx, isl_error_invalid,
2723 "input is not a set", goto error);
2724 return isl_basic_map_range(bmap);
2725 error:
2726 isl_basic_map_free(bmap);
2727 return NULL;
2728 }
2729
2730 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
2731 FILE *input)
2732 {
2733 struct isl_basic_map *bmap;
2734 isl_stream *s = isl_stream_new_file(ctx, input);
2735 if (!s)
2736 return NULL;
2737 bmap = basic_map_read(s);
2738 isl_stream_free(s);
2739 return bmap;
2740 }
2741
2742 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
2743 FILE *input)
2744 {
2745 isl_basic_set *bset;
2746 isl_stream *s = isl_stream_new_file(ctx, input);
2747 if (!s)
2748 return NULL;
2749 bset = basic_set_read(s);
2750 isl_stream_free(s);
2751 return bset;
2752 }
2753
2754 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
2755 const char *str)
2756 {
2757 struct isl_basic_map *bmap;
2758 isl_stream *s = isl_stream_new_str(ctx, str);
2759 if (!s)
2760 return NULL;
2761 bmap = basic_map_read(s);
2762 isl_stream_free(s);
2763 return bmap;
2764 }
2765
2766 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
2767 const char *str)
2768 {
2769 isl_basic_set *bset;
2770 isl_stream *s = isl_stream_new_str(ctx, str);
2771 if (!s)
2772 return NULL;
2773 bset = basic_set_read(s);
2774 isl_stream_free(s);
2775 return bset;
2776 }
2777
2778 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
2779 FILE *input)
2780 {
2781 struct isl_map *map;
2782 isl_stream *s = isl_stream_new_file(ctx, input);
2783 if (!s)
2784 return NULL;
2785 map = isl_stream_read_map(s);
2786 isl_stream_free(s);
2787 return map;
2788 }
2789
2790 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
2791 const char *str)
2792 {
2793 struct isl_map *map;
2794 isl_stream *s = isl_stream_new_str(ctx, str);
2795 if (!s)
2796 return NULL;
2797 map = isl_stream_read_map(s);
2798 isl_stream_free(s);
2799 return map;
2800 }
2801
2802 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
2803 FILE *input)
2804 {
2805 isl_set *set;
2806 isl_stream *s = isl_stream_new_file(ctx, input);
2807 if (!s)
2808 return NULL;
2809 set = isl_stream_read_set(s);
2810 isl_stream_free(s);
2811 return set;
2812 }
2813
2814 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
2815 const char *str)
2816 {
2817 isl_set *set;
2818 isl_stream *s = isl_stream_new_str(ctx, str);
2819 if (!s)
2820 return NULL;
2821 set = isl_stream_read_set(s);
2822 isl_stream_free(s);
2823 return set;
2824 }
2825
2826 __isl_give isl_union_map *isl_union_map_read_from_file(isl_ctx *ctx,
2827 FILE *input)
2828 {
2829 isl_union_map *umap;
2830 isl_stream *s = isl_stream_new_file(ctx, input);
2831 if (!s)
2832 return NULL;
2833 umap = isl_stream_read_union_map(s);
2834 isl_stream_free(s);
2835 return umap;
2836 }
2837
2838 __isl_give isl_union_map *isl_union_map_read_from_str(struct isl_ctx *ctx,
2839 const char *str)
2840 {
2841 isl_union_map *umap;
2842 isl_stream *s = isl_stream_new_str(ctx, str);
2843 if (!s)
2844 return NULL;
2845 umap = isl_stream_read_union_map(s);
2846 isl_stream_free(s);
2847 return umap;
2848 }
2849
2850 __isl_give isl_union_set *isl_union_set_read_from_file(isl_ctx *ctx,
2851 FILE *input)
2852 {
2853 isl_union_set *uset;
2854 isl_stream *s = isl_stream_new_file(ctx, input);
2855 if (!s)
2856 return NULL;
2857 uset = isl_stream_read_union_set(s);
2858 isl_stream_free(s);
2859 return uset;
2860 }
2861
2862 __isl_give isl_union_set *isl_union_set_read_from_str(struct isl_ctx *ctx,
2863 const char *str)
2864 {
2865 isl_union_set *uset;
2866 isl_stream *s = isl_stream_new_str(ctx, str);
2867 if (!s)
2868 return NULL;
2869 uset = isl_stream_read_union_set(s);
2870 isl_stream_free(s);
2871 return uset;
2872 }
2873
2874 static __isl_give isl_vec *isl_vec_read_polylib(__isl_keep isl_stream *s)
2875 {
2876 struct isl_vec *vec = NULL;
2877 struct isl_token *tok;
2878 unsigned size;
2879 int j;
2880
2881 tok = isl_stream_next_token(s);
2882 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2883 isl_stream_error(s, tok, "expecting vector length");
2884 goto error;
2885 }
2886
2887 size = isl_int_get_si(tok->u.v);
2888 isl_token_free(tok);
2889
2890 vec = isl_vec_alloc(s->ctx, size);
2891
2892 for (j = 0; j < size; ++j) {
2893 tok = isl_stream_next_token(s);
2894 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2895 isl_stream_error(s, tok, "expecting constant value");
2896 goto error;
2897 }
2898 isl_int_set(vec->el[j], tok->u.v);
2899 isl_token_free(tok);
2900 }
2901
2902 return vec;
2903 error:
2904 isl_token_free(tok);
2905 isl_vec_free(vec);
2906 return NULL;
2907 }
2908
2909 static __isl_give isl_vec *vec_read(__isl_keep isl_stream *s)
2910 {
2911 return isl_vec_read_polylib(s);
2912 }
2913
2914 __isl_give isl_vec *isl_vec_read_from_file(isl_ctx *ctx, FILE *input)
2915 {
2916 isl_vec *v;
2917 isl_stream *s = isl_stream_new_file(ctx, input);
2918 if (!s)
2919 return NULL;
2920 v = vec_read(s);
2921 isl_stream_free(s);
2922 return v;
2923 }
2924
2925 __isl_give isl_pw_qpolynomial *isl_stream_read_pw_qpolynomial(
2926 __isl_keep isl_stream *s)
2927 {
2928 struct isl_obj obj;
2929
2930 obj = obj_read(s);
2931 if (obj.v)
2932 isl_assert(s->ctx, obj.type == isl_obj_pw_qpolynomial,
2933 goto error);
2934
2935 return obj.v;
2936 error:
2937 obj.type->free(obj.v);
2938 return NULL;
2939 }
2940
2941 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_str(isl_ctx *ctx,
2942 const char *str)
2943 {
2944 isl_pw_qpolynomial *pwqp;
2945 isl_stream *s = isl_stream_new_str(ctx, str);
2946 if (!s)
2947 return NULL;
2948 pwqp = isl_stream_read_pw_qpolynomial(s);
2949 isl_stream_free(s);
2950 return pwqp;
2951 }
2952
2953 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_file(isl_ctx *ctx,
2954 FILE *input)
2955 {
2956 isl_pw_qpolynomial *pwqp;
2957 isl_stream *s = isl_stream_new_file(ctx, input);
2958 if (!s)
2959 return NULL;
2960 pwqp = isl_stream_read_pw_qpolynomial(s);
2961 isl_stream_free(s);
2962 return pwqp;
2963 }
2964
2965 /* Is the next token an identifer not in "v"?
2966 */
2967 static int next_is_fresh_ident(__isl_keep isl_stream *s, struct vars *v)
2968 {
2969 int n = v->n;
2970 int fresh;
2971 struct isl_token *tok;
2972
2973 tok = isl_stream_next_token(s);
2974 if (!tok)
2975 return 0;
2976 fresh = tok->type == ISL_TOKEN_IDENT && vars_pos(v, tok->u.s, -1) >= n;
2977 isl_stream_push_token(s, tok);
2978
2979 vars_drop(v, v->n - n);
2980
2981 return fresh;
2982 }
2983
2984 /* First read the domain of the affine expression, which may be
2985 * a parameter space or a set.
2986 * The tricky part is that we don't know if the domain is a set or not,
2987 * so when we are trying to read the domain, we may actually be reading
2988 * the affine expression itself (defined on a parameter domains)
2989 * If the tuple we are reading is named, we assume it's the domain.
2990 * Also, if inside the tuple, the first thing we find is a nested tuple
2991 * or a new identifier, we again assume it's the domain.
2992 * Otherwise, we assume we are reading an affine expression.
2993 */
2994 static __isl_give isl_set *read_aff_domain(__isl_keep isl_stream *s,
2995 __isl_take isl_set *dom, struct vars *v)
2996 {
2997 struct isl_token *tok;
2998
2999 tok = isl_stream_next_token(s);
3000 if (tok && (tok->type == ISL_TOKEN_IDENT || tok->is_keyword)) {
3001 isl_stream_push_token(s, tok);
3002 return read_map_tuple(s, dom, isl_dim_set, v, 1, 0);
3003 }
3004 if (!tok || tok->type != '[') {
3005 isl_stream_error(s, tok, "expecting '['");
3006 goto error;
3007 }
3008 if (next_is_tuple(s) || next_is_fresh_ident(s, v)) {
3009 isl_stream_push_token(s, tok);
3010 dom = read_map_tuple(s, dom, isl_dim_set, v, 1, 0);
3011 } else
3012 isl_stream_push_token(s, tok);
3013
3014 return dom;
3015 error:
3016 if (tok)
3017 isl_stream_push_token(s, tok);
3018 isl_set_free(dom);
3019 return NULL;
3020 }
3021
3022 /* Read an affine expression from "s".
3023 */
3024 __isl_give isl_aff *isl_stream_read_aff(__isl_keep isl_stream *s)
3025 {
3026 isl_aff *aff;
3027 isl_multi_aff *ma;
3028
3029 ma = isl_stream_read_multi_aff(s);
3030 if (!ma)
3031 return NULL;
3032 if (isl_multi_aff_dim(ma, isl_dim_out) != 1)
3033 isl_die(s->ctx, isl_error_invalid,
3034 "expecting single affine expression",
3035 goto error);
3036
3037 aff = isl_multi_aff_get_aff(ma, 0);
3038 isl_multi_aff_free(ma);
3039 return aff;
3040 error:
3041 isl_multi_aff_free(ma);
3042 return NULL;
3043 }
3044
3045 /* Read a piecewise affine expression from "s" with domain (space) "dom".
3046 */
3047 static __isl_give isl_pw_aff *read_pw_aff_with_dom(__isl_keep isl_stream *s,
3048 __isl_take isl_set *dom, struct vars *v)
3049 {
3050 isl_pw_aff *pwaff = NULL;
3051
3052 if (!isl_set_is_params(dom) && isl_stream_eat(s, ISL_TOKEN_TO))
3053 goto error;
3054
3055 if (isl_stream_eat(s, '['))
3056 goto error;
3057
3058 pwaff = accept_affine(s, isl_set_get_space(dom), v);
3059
3060 if (isl_stream_eat(s, ']'))
3061 goto error;
3062
3063 dom = read_optional_formula(s, dom, v, 0);
3064 pwaff = isl_pw_aff_intersect_domain(pwaff, dom);
3065
3066 return pwaff;
3067 error:
3068 isl_set_free(dom);
3069 isl_pw_aff_free(pwaff);
3070 return NULL;
3071 }
3072
3073 __isl_give isl_pw_aff *isl_stream_read_pw_aff(__isl_keep isl_stream *s)
3074 {
3075 struct vars *v;
3076 isl_set *dom = NULL;
3077 isl_set *aff_dom;
3078 isl_pw_aff *pa = NULL;
3079 int n;
3080
3081 v = vars_new(s->ctx);
3082 if (!v)
3083 return NULL;
3084
3085 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
3086 if (next_is_tuple(s)) {
3087 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
3088 if (isl_stream_eat(s, ISL_TOKEN_TO))
3089 goto error;
3090 }
3091 if (isl_stream_eat(s, '{'))
3092 goto error;
3093
3094 n = v->n;
3095 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
3096 pa = read_pw_aff_with_dom(s, aff_dom, v);
3097 vars_drop(v, v->n - n);
3098
3099 while (isl_stream_eat_if_available(s, ';')) {
3100 isl_pw_aff *pa_i;
3101
3102 n = v->n;
3103 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
3104 pa_i = read_pw_aff_with_dom(s, aff_dom, v);
3105 vars_drop(v, v->n - n);
3106
3107 pa = isl_pw_aff_union_add(pa, pa_i);
3108 }
3109
3110 if (isl_stream_eat(s, '}'))
3111 goto error;
3112
3113 vars_free(v);
3114 isl_set_free(dom);
3115 return pa;
3116 error:
3117 vars_free(v);
3118 isl_set_free(dom);
3119 isl_pw_aff_free(pa);
3120 return NULL;
3121 }
3122
3123 __isl_give isl_aff *isl_aff_read_from_str(isl_ctx *ctx, const char *str)
3124 {
3125 isl_aff *aff;
3126 isl_stream *s = isl_stream_new_str(ctx, str);
3127 if (!s)
3128 return NULL;
3129 aff = isl_stream_read_aff(s);
3130 isl_stream_free(s);
3131 return aff;
3132 }
3133
3134 __isl_give isl_pw_aff *isl_pw_aff_read_from_str(isl_ctx *ctx, const char *str)
3135 {
3136 isl_pw_aff *pa;
3137 isl_stream *s = isl_stream_new_str(ctx, str);
3138 if (!s)
3139 return NULL;
3140 pa = isl_stream_read_pw_aff(s);
3141 isl_stream_free(s);
3142 return pa;
3143 }
3144
3145 /* Read an isl_pw_multi_aff from "s".
3146 * We currently read a generic object and if it turns out to be a set or
3147 * a map, we convert that to an isl_pw_multi_aff.
3148 * It would be more efficient if we were to construct the isl_pw_multi_aff
3149 * directly.
3150 */
3151 __isl_give isl_pw_multi_aff *isl_stream_read_pw_multi_aff(
3152 __isl_keep isl_stream *s)
3153 {
3154 struct isl_obj obj;
3155
3156 obj = obj_read(s);
3157 if (!obj.v)
3158 return NULL;
3159
3160 if (obj.type == isl_obj_map)
3161 return isl_pw_multi_aff_from_map(obj.v);
3162 if (obj.type == isl_obj_set)
3163 return isl_pw_multi_aff_from_set(obj.v);
3164
3165 obj.type->free(obj.v);
3166 isl_die(s->ctx, isl_error_invalid, "unexpected object type",
3167 return NULL);
3168 }
3169
3170 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_read_from_str(isl_ctx *ctx,
3171 const char *str)
3172 {
3173 isl_pw_multi_aff *pma;
3174 isl_stream *s = isl_stream_new_str(ctx, str);
3175 if (!s)
3176 return NULL;
3177 pma = isl_stream_read_pw_multi_aff(s);
3178 isl_stream_free(s);
3179 return pma;
3180 }
3181
3182 /* Read an isl_union_pw_multi_aff from "s".
3183 * We currently read a generic object and if it turns out to be a set or
3184 * a map, we convert that to an isl_union_pw_multi_aff.
3185 * It would be more efficient if we were to construct
3186 * the isl_union_pw_multi_aff directly.
3187 */
3188 __isl_give isl_union_pw_multi_aff *isl_stream_read_union_pw_multi_aff(
3189 __isl_keep isl_stream *s)
3190 {
3191 struct isl_obj obj;
3192
3193 obj = obj_read(s);
3194 if (!obj.v)
3195 return NULL;
3196
3197 if (obj.type == isl_obj_map || obj.type == isl_obj_set)
3198 obj = to_union(s->ctx, obj);
3199 if (obj.type == isl_obj_union_map)
3200 return isl_union_pw_multi_aff_from_union_map(obj.v);
3201 if (obj.type == isl_obj_union_set)
3202 return isl_union_pw_multi_aff_from_union_set(obj.v);
3203
3204 obj.type->free(obj.v);
3205 isl_die(s->ctx, isl_error_invalid, "unexpected object type",
3206 return NULL);
3207 }
3208
3209 /* Read an isl_union_pw_multi_aff from "str".
3210 */
3211 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_read_from_str(
3212 isl_ctx *ctx, const char *str)
3213 {
3214 isl_union_pw_multi_aff *upma;
3215 isl_stream *s = isl_stream_new_str(ctx, str);
3216 if (!s)
3217 return NULL;
3218 upma = isl_stream_read_union_pw_multi_aff(s);
3219 isl_stream_free(s);
3220 return upma;
3221 }
3222
3223 /* Assuming "pa" represents a single affine expression defined on a universe
3224 * domain, extract this affine expression.
3225 */
3226 static __isl_give isl_aff *aff_from_pw_aff(__isl_take isl_pw_aff *pa)
3227 {
3228 isl_aff *aff;
3229
3230 if (!pa)
3231 return NULL;
3232 if (pa->n != 1)
3233 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
3234 "expecting single affine expression",
3235 goto error);
3236 if (!isl_set_plain_is_universe(pa->p[0].set))
3237 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
3238 "expecting universe domain",
3239 goto error);
3240
3241 aff = isl_aff_copy(pa->p[0].aff);
3242 isl_pw_aff_free(pa);
3243 return aff;
3244 error:
3245 isl_pw_aff_free(pa);
3246 return NULL;
3247 }
3248
3249 /* This function is called for each element in a tuple inside
3250 * isl_stream_read_multi_val.
3251 * Read an isl_val from "s" and add it to *list.
3252 */
3253 static __isl_give isl_space *read_val_el(__isl_keep isl_stream *s,
3254 struct vars *v, __isl_take isl_space *space, int rational, void *user)
3255 {
3256 isl_val_list **list = (isl_val_list **) user;
3257 isl_val *val;
3258
3259 val = isl_stream_read_val(s);
3260 *list = isl_val_list_add(*list, val);
3261 if (!*list)
3262 return isl_space_free(space);
3263
3264 return space;
3265 }
3266
3267 /* Read an isl_multi_val from "s".
3268 *
3269 * We first read a tuple space, collecting the element values in a list.
3270 * Then we create an isl_multi_val from the space and the isl_val_list.
3271 */
3272 __isl_give isl_multi_val *isl_stream_read_multi_val(__isl_keep isl_stream *s)
3273 {
3274 struct vars *v;
3275 isl_set *dom = NULL;
3276 isl_space *space;
3277 isl_multi_val *mv = NULL;
3278 isl_val_list *list;
3279
3280 v = vars_new(s->ctx);
3281 if (!v)
3282 return NULL;
3283
3284 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
3285 if (next_is_tuple(s)) {
3286 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
3287 if (isl_stream_eat(s, ISL_TOKEN_TO))
3288 goto error;
3289 }
3290 if (!isl_set_plain_is_universe(dom))
3291 isl_die(s->ctx, isl_error_invalid,
3292 "expecting universe parameter domain", goto error);
3293 if (isl_stream_eat(s, '{'))
3294 goto error;
3295
3296 space = isl_set_get_space(dom);
3297
3298 list = isl_val_list_alloc(s->ctx, 0);
3299 space = read_tuple_space(s, v, space, 1, 0, &read_val_el, &list);
3300 mv = isl_multi_val_from_val_list(space, list);
3301
3302 if (isl_stream_eat(s, '}'))
3303 goto error;
3304
3305 vars_free(v);
3306 isl_set_free(dom);
3307 return mv;
3308 error:
3309 vars_free(v);
3310 isl_set_free(dom);
3311 isl_multi_val_free(mv);
3312 return NULL;
3313 }
3314
3315 /* Read an isl_multi_val from "str".
3316 */
3317 __isl_give isl_multi_val *isl_multi_val_read_from_str(isl_ctx *ctx,
3318 const char *str)
3319 {
3320 isl_multi_val *mv;
3321 isl_stream *s = isl_stream_new_str(ctx, str);
3322 if (!s)
3323 return NULL;
3324 mv = isl_stream_read_multi_val(s);
3325 isl_stream_free(s);
3326 return mv;
3327 }
3328
3329 /* Read a multi-affine expression from "s".
3330 * If the multi-affine expression has a domain, then the tuple
3331 * representing this domain cannot involve any affine expressions.
3332 * The tuple representing the actual expressions needs to consist
3333 * of only affine expressions. Moreover, these expressions can
3334 * only depend on parameters and input dimensions and not on other
3335 * output dimensions.
3336 */
3337 __isl_give isl_multi_aff *isl_stream_read_multi_aff(__isl_keep isl_stream *s)
3338 {
3339 struct vars *v;
3340 isl_set *dom = NULL;
3341 isl_multi_pw_aff *tuple = NULL;
3342 int dim, i, n;
3343 isl_space *space, *dom_space;
3344 isl_multi_aff *ma = NULL;
3345
3346 v = vars_new(s->ctx);
3347 if (!v)
3348 return NULL;
3349
3350 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
3351 if (next_is_tuple(s)) {
3352 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
3353 if (isl_stream_eat(s, ISL_TOKEN_TO))
3354 goto error;
3355 }
3356 if (!isl_set_plain_is_universe(dom))
3357 isl_die(s->ctx, isl_error_invalid,
3358 "expecting universe parameter domain", goto error);
3359 if (isl_stream_eat(s, '{'))
3360 goto error;
3361
3362 tuple = read_tuple(s, v, 0, 0);
3363 if (!tuple)
3364 goto error;
3365 if (isl_stream_eat_if_available(s, ISL_TOKEN_TO)) {
3366 isl_set *set;
3367 isl_space *space;
3368 int has_expr;
3369
3370 has_expr = tuple_has_expr(tuple);
3371 if (has_expr < 0)
3372 goto error;
3373 if (has_expr)
3374 isl_die(s->ctx, isl_error_invalid,
3375 "expecting universe domain", goto error);
3376 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
3377 set = isl_set_universe(space);
3378 dom = isl_set_intersect_params(set, dom);
3379 isl_multi_pw_aff_free(tuple);
3380 tuple = read_tuple(s, v, 0, 0);
3381 if (!tuple)
3382 goto error;
3383 }
3384
3385 if (isl_stream_eat(s, '}'))
3386 goto error;
3387
3388 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
3389 dim = isl_set_dim(dom, isl_dim_all);
3390 dom_space = isl_set_get_space(dom);
3391 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
3392 space = isl_space_align_params(space, isl_space_copy(dom_space));
3393 if (!isl_space_is_params(dom_space))
3394 space = isl_space_map_from_domain_and_range(
3395 isl_space_copy(dom_space), space);
3396 isl_space_free(dom_space);
3397 ma = isl_multi_aff_alloc(space);
3398
3399 for (i = 0; i < n; ++i) {
3400 isl_pw_aff *pa;
3401 isl_aff *aff;
3402 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
3403 aff = aff_from_pw_aff(pa);
3404 if (!aff)
3405 goto error;
3406 if (isl_aff_involves_dims(aff, isl_dim_in, dim, i + 1)) {
3407 isl_aff_free(aff);
3408 isl_die(s->ctx, isl_error_invalid,
3409 "not an affine expression", goto error);
3410 }
3411 aff = isl_aff_drop_dims(aff, isl_dim_in, dim, n);
3412 space = isl_multi_aff_get_domain_space(ma);
3413 aff = isl_aff_reset_domain_space(aff, space);
3414 ma = isl_multi_aff_set_aff(ma, i, aff);
3415 }
3416
3417 isl_multi_pw_aff_free(tuple);
3418 vars_free(v);
3419 isl_set_free(dom);
3420 return ma;
3421 error:
3422 isl_multi_pw_aff_free(tuple);
3423 vars_free(v);
3424 isl_set_free(dom);
3425 isl_multi_aff_free(ma);
3426 return NULL;
3427 }
3428
3429 __isl_give isl_multi_aff *isl_multi_aff_read_from_str(isl_ctx *ctx,
3430 const char *str)
3431 {
3432 isl_multi_aff *maff;
3433 isl_stream *s = isl_stream_new_str(ctx, str);
3434 if (!s)
3435 return NULL;
3436 maff = isl_stream_read_multi_aff(s);
3437 isl_stream_free(s);
3438 return maff;
3439 }
3440
3441 /* Read an isl_multi_pw_aff from "s".
3442 *
3443 * The input format is similar to that of map, except that any conditions
3444 * on the domains should be specified inside the tuple since each
3445 * piecewise affine expression may have a different domain.
3446 *
3447 * Since we do not know in advance if the isl_multi_pw_aff lives
3448 * in a set or a map space, we first read the first tuple and check
3449 * if it is followed by a "->". If so, we convert the tuple into
3450 * the domain of the isl_multi_pw_aff and read in the next tuple.
3451 * This tuple (or the first tuple if it was not followed by a "->")
3452 * is then converted into the isl_multi_pw_aff.
3453 *
3454 * Note that the function read_tuple accepts tuples where some output or
3455 * set dimensions are defined in terms of other output or set dimensions
3456 * since this function is also used to read maps. As a special case,
3457 * read_tuple also accept dimensions that are defined in terms of themselves
3458 * (i.e., that are not defined).
3459 * These cases are not allowed when reading am isl_multi_pw_aff so we check
3460 * that the definition of the output/set dimensions does not involve any
3461 * output/set dimensions.
3462 * We then drop the output dimensions from the domain of the result
3463 * of read_tuple (which is of the form [input, output] -> [output],
3464 * with anonymous domain) and reset the space.
3465 */
3466 __isl_give isl_multi_pw_aff *isl_stream_read_multi_pw_aff(
3467 __isl_keep isl_stream *s)
3468 {
3469 struct vars *v;
3470 isl_set *dom = NULL;
3471 isl_multi_pw_aff *tuple = NULL;
3472 int dim, i, n;
3473 isl_space *space, *dom_space;
3474 isl_multi_pw_aff *mpa = NULL;
3475
3476 v = vars_new(s->ctx);
3477 if (!v)
3478 return NULL;
3479
3480 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
3481 if (next_is_tuple(s)) {
3482 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
3483 if (isl_stream_eat(s, ISL_TOKEN_TO))
3484 goto error;
3485 }
3486 if (isl_stream_eat(s, '{'))
3487 goto error;
3488
3489 tuple = read_tuple(s, v, 0, 0);
3490 if (!tuple)
3491 goto error;
3492 if (isl_stream_eat_if_available(s, ISL_TOKEN_TO)) {
3493 isl_map *map = map_from_tuple(tuple, dom, isl_dim_in, v, 0);
3494 dom = isl_map_domain(map);
3495 tuple = read_tuple(s, v, 0, 0);
3496 if (!tuple)
3497 goto error;
3498 }
3499
3500 if (isl_stream_eat(s, '}'))
3501 goto error;
3502
3503 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
3504 dim = isl_set_dim(dom, isl_dim_all);
3505 dom_space = isl_set_get_space(dom);
3506 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
3507 space = isl_space_align_params(space, isl_space_copy(dom_space));
3508 if (!isl_space_is_params(dom_space))
3509 space = isl_space_map_from_domain_and_range(
3510 isl_space_copy(dom_space), space);
3511 isl_space_free(dom_space);
3512 mpa = isl_multi_pw_aff_alloc(space);
3513
3514 for (i = 0; i < n; ++i) {
3515 isl_pw_aff *pa;
3516 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
3517 if (!pa)
3518 goto error;
3519 if (isl_pw_aff_involves_dims(pa, isl_dim_in, dim, i + 1)) {
3520 isl_pw_aff_free(pa);
3521 isl_die(s->ctx, isl_error_invalid,
3522 "not an affine expression", goto error);
3523 }
3524 pa = isl_pw_aff_drop_dims(pa, isl_dim_in, dim, n);
3525 space = isl_multi_pw_aff_get_domain_space(mpa);
3526 pa = isl_pw_aff_reset_domain_space(pa, space);
3527 mpa = isl_multi_pw_aff_set_pw_aff(mpa, i, pa);
3528 }
3529
3530 isl_multi_pw_aff_free(tuple);
3531 vars_free(v);
3532 mpa = isl_multi_pw_aff_intersect_domain(mpa, dom);
3533 return mpa;
3534 error:
3535 isl_multi_pw_aff_free(tuple);
3536 vars_free(v);
3537 isl_set_free(dom);
3538 isl_multi_pw_aff_free(mpa);
3539 return NULL;
3540 }
3541
3542 /* Read an isl_multi_pw_aff from "str".
3543 */
3544 __isl_give isl_multi_pw_aff *isl_multi_pw_aff_read_from_str(isl_ctx *ctx,
3545 const char *str)
3546 {
3547 isl_multi_pw_aff *mpa;
3548 isl_stream *s = isl_stream_new_str(ctx, str);
3549 if (!s)
3550 return NULL;
3551 mpa = isl_stream_read_multi_pw_aff(s);
3552 isl_stream_free(s);
3553 return mpa;
3554 }
3555
3556 /* Read the body of an isl_union_pw_aff from "s" with parameter domain "dom".
3557 */
3558 static __isl_give isl_union_pw_aff *read_union_pw_aff_with_dom(
3559 __isl_keep isl_stream *s, __isl_take isl_set *dom, struct vars *v)
3560 {
3561 isl_pw_aff *pa;
3562 isl_union_pw_aff *upa = NULL;
3563 isl_set *aff_dom;
3564 int n;
3565
3566 n = v->n;
3567 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
3568 pa = read_pw_aff_with_dom(s, aff_dom, v);
3569 vars_drop(v, v->n - n);
3570
3571 upa = isl_union_pw_aff_from_pw_aff(pa);
3572
3573 while (isl_stream_eat_if_available(s, ';')) {
3574 isl_pw_aff *pa_i;
3575 isl_union_pw_aff *upa_i;
3576
3577 n = v->n;
3578 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
3579 pa_i = read_pw_aff_with_dom(s, aff_dom, v);
3580 vars_drop(v, v->n - n);
3581
3582 upa_i = isl_union_pw_aff_from_pw_aff(pa_i);
3583 upa = isl_union_pw_aff_union_add(upa, upa_i);
3584 }
3585
3586 isl_set_free(dom);
3587 return upa;
3588 }
3589
3590 /* This function is called for each element in a tuple inside
3591 * isl_stream_read_multi_union_pw_aff.
3592 *
3593 * Read a '{', the union piecewise affine expression body and a '}' and
3594 * add the isl_union_pw_aff to *list.
3595 */
3596 static __isl_give isl_space *read_union_pw_aff_el(__isl_keep isl_stream *s,
3597 struct vars *v, __isl_take isl_space *space, int rational, void *user)
3598 {
3599 isl_set *dom;
3600 isl_union_pw_aff *upa;
3601 isl_union_pw_aff_list **list = (isl_union_pw_aff_list **) user;
3602
3603 dom = isl_set_universe(isl_space_params(isl_space_copy(space)));
3604 if (isl_stream_eat(s, '{'))
3605 goto error;
3606 upa = read_union_pw_aff_with_dom(s, dom, v);
3607 *list = isl_union_pw_aff_list_add(*list, upa);
3608 if (isl_stream_eat(s, '}'))
3609 return isl_space_free(space);
3610 if (!*list)
3611 return isl_space_free(space);
3612 return space;
3613 error:
3614 isl_set_free(dom);
3615 return isl_space_free(space);
3616 }
3617
3618 /* Do the next tokens in "s" correspond to an empty tuple?
3619 * In particular, does the stream start with a '[', followed by a ']',
3620 * not followed by a "->"?
3621 */
3622 static int next_is_empty_tuple(__isl_keep isl_stream *s)
3623 {
3624 struct isl_token *tok, *tok2, *tok3;
3625 int is_empty_tuple = 0;
3626
3627 tok = isl_stream_next_token(s);
3628 if (!tok)
3629 return 0;
3630 if (tok->type != '[') {
3631 isl_stream_push_token(s, tok);
3632 return 0;
3633 }
3634
3635 tok2 = isl_stream_next_token(s);
3636 if (tok2 && tok2->type == ']') {
3637 tok3 = isl_stream_next_token(s);
3638 is_empty_tuple = !tok || tok->type != ISL_TOKEN_TO;
3639 if (tok3)
3640 isl_stream_push_token(s, tok3);
3641 }
3642 if (tok2)
3643 isl_stream_push_token(s, tok2);
3644 isl_stream_push_token(s, tok);
3645
3646 return is_empty_tuple;
3647 }
3648
3649 /* Do the next tokens in "s" correspond to a tuple of parameters?
3650 * In particular, does the stream start with a '[' that is not
3651 * followed by a '{' or a nested tuple?
3652 */
3653 static int next_is_param_tuple(__isl_keep isl_stream *s)
3654 {
3655 struct isl_token *tok, *tok2;
3656 int is_tuple;
3657
3658 tok = isl_stream_next_token(s);
3659 if (!tok)
3660 return 0;
3661 if (tok->type != '[' || next_is_tuple(s)) {
3662 isl_stream_push_token(s, tok);
3663 return 0;
3664 }
3665
3666 tok2 = isl_stream_next_token(s);
3667 is_tuple = tok2 && tok2->type != '{';
3668 if (tok2)
3669 isl_stream_push_token(s, tok2);
3670 isl_stream_push_token(s, tok);
3671
3672 return is_tuple;
3673 }
3674
3675 /* Read an isl_multi_union_pw_aff from "s".
3676 *
3677 * The input has the form
3678 *
3679 * [{ [..] : ... ; [..] : ... }, { [..] : ... ; [..] : ... }]
3680 *
3681 * or
3682 *
3683 * [..] -> [{ [..] : ... ; [..] : ... }, { [..] : ... ; [..] : ... }]
3684 *
3685 * We first check for the special case of an empty tuple "[]".
3686 * Then we check if there are any parameters.
3687 * Finally, we read the tuple, collecting the individual isl_union_pw_aff
3688 * elements in a list and construct the result from the tuple space and
3689 * the list.
3690 */
3691 __isl_give isl_multi_union_pw_aff *isl_stream_read_multi_union_pw_aff(
3692 __isl_keep isl_stream *s)
3693 {
3694 struct vars *v;
3695 isl_set *dom = NULL;
3696 isl_space *space;
3697 isl_multi_union_pw_aff *mupa = NULL;
3698 isl_union_pw_aff_list *list;
3699
3700 if (next_is_empty_tuple(s)) {
3701 if (isl_stream_eat(s, '['))
3702 return NULL;
3703 if (isl_stream_eat(s, ']'))
3704 return NULL;
3705 space = isl_space_set_alloc(s->ctx, 0, 0);
3706 return isl_multi_union_pw_aff_zero(space);
3707 }
3708
3709 v = vars_new(s->ctx);
3710 if (!v)
3711 return NULL;
3712
3713 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
3714 if (next_is_param_tuple(s)) {
3715 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
3716 if (isl_stream_eat(s, ISL_TOKEN_TO))
3717 goto error;
3718 }
3719 space = isl_set_get_space(dom);
3720 isl_set_free(dom);
3721 list = isl_union_pw_aff_list_alloc(s->ctx, 0);
3722 space = read_tuple_space(s, v, space, 1, 0,
3723 &read_union_pw_aff_el, &list);
3724 mupa = isl_multi_union_pw_aff_from_union_pw_aff_list(space, list);
3725
3726 vars_free(v);
3727
3728 return mupa;
3729 error:
3730 vars_free(v);
3731 isl_set_free(dom);
3732 isl_multi_union_pw_aff_free(mupa);
3733 return NULL;
3734 }
3735
3736 /* Read an isl_multi_union_pw_aff from "str".
3737 */
3738 __isl_give isl_multi_union_pw_aff *isl_multi_union_pw_aff_read_from_str(
3739 isl_ctx *ctx, const char *str)
3740 {
3741 isl_multi_union_pw_aff *mupa;
3742 isl_stream *s = isl_stream_new_str(ctx, str);
3743 if (!s)
3744 return NULL;
3745 mupa = isl_stream_read_multi_union_pw_aff(s);
3746 isl_stream_free(s);
3747 return mupa;
3748 }
3749
3750 __isl_give isl_union_pw_qpolynomial *isl_stream_read_union_pw_qpolynomial(
3751 __isl_keep isl_stream *s)
3752 {
3753 struct isl_obj obj;
3754
3755 obj = obj_read(s);
3756 if (obj.type == isl_obj_pw_qpolynomial) {
3757 obj.type = isl_obj_union_pw_qpolynomial;
3758 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
3759 }
3760 if (obj.v)
3761 isl_assert(s->ctx, obj.type == isl_obj_union_pw_qpolynomial,
3762 goto error);
3763
3764 return obj.v;
3765 error:
3766 obj.type->free(obj.v);
3767 return NULL;
3768 }
3769
3770 __isl_give isl_union_pw_qpolynomial *isl_union_pw_qpolynomial_read_from_str(
3771 isl_ctx *ctx, const char *str)
3772 {
3773 isl_union_pw_qpolynomial *upwqp;
3774 isl_stream *s = isl_stream_new_str(ctx, str);
3775 if (!s)
3776 return NULL;
3777 upwqp = isl_stream_read_union_pw_qpolynomial(s);
3778 isl_stream_free(s);
3779 return upwqp;
3780 }
Integer set library