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isl_ast_build_get_stride_constraint: combine multiple strides
[isl.git] / isl_input.c
blobe93233d99542f93e0fa4b18e5fe08d53f713fd46
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 * Copyright 2012 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/list.h>
29
30 struct variable {
31 char *name;
32 int pos;
33 struct variable *next;
34 };
35
36 struct vars {
37 struct isl_ctx *ctx;
38 int n;
39 struct variable *v;
40 };
41
42 static struct vars *vars_new(struct isl_ctx *ctx)
43 {
44 struct vars *v;
45 v = isl_alloc_type(ctx, struct vars);
46 if (!v)
47 return NULL;
48 v->ctx = ctx;
49 v->n = 0;
50 v->v = NULL;
51 return v;
52 }
53
54 static void variable_free(struct variable *var)
55 {
56 while (var) {
57 struct variable *next = var->next;
58 free(var->name);
59 free(var);
60 var = next;
61 }
62 }
63
64 static void vars_free(struct vars *v)
65 {
66 if (!v)
67 return;
68 variable_free(v->v);
69 free(v);
70 }
71
72 static void vars_drop(struct vars *v, int n)
73 {
74 struct variable *var;
75
76 if (!v || !v->v)
77 return;
78
79 v->n -= n;
80
81 var = v->v;
82 while (--n >= 0) {
83 struct variable *next = var->next;
84 free(var->name);
85 free(var);
86 var = next;
87 }
88 v->v = var;
89 }
90
91 static struct variable *variable_new(struct vars *v, const char *name, int len,
92 int pos)
93 {
94 struct variable *var;
95 var = isl_calloc_type(v->ctx, struct variable);
96 if (!var)
97 goto error;
98 var->name = strdup(name);
99 var->name[len] = '\0';
100 var->pos = pos;
101 var->next = v->v;
102 return var;
103 error:
104 variable_free(v->v);
105 return NULL;
106 }
107
108 static int vars_pos(struct vars *v, const char *s, int len)
109 {
110 int pos;
111 struct variable *q;
112
113 if (len == -1)
114 len = strlen(s);
115 for (q = v->v; q; q = q->next) {
116 if (strncmp(q->name, s, len) == 0 && q->name[len] == '\0')
117 break;
118 }
119 if (q)
120 pos = q->pos;
121 else {
122 pos = v->n;
123 v->v = variable_new(v, s, len, v->n);
124 if (!v->v)
125 return -1;
126 v->n++;
127 }
128 return pos;
129 }
130
131 static int vars_add_anon(struct vars *v)
132 {
133 v->v = variable_new(v, "", 0, v->n);
134
135 if (!v->v)
136 return -1;
137 v->n++;
138
139 return 0;
140 }
141
142 /* Obtain next token, with some preprocessing.
143 * In particular, evaluate expressions of the form x^y,
144 * with x and y values.
145 */
146 static struct isl_token *next_token(struct isl_stream *s)
147 {
148 struct isl_token *tok, *tok2;
149
150 tok = isl_stream_next_token(s);
151 if (!tok || tok->type != ISL_TOKEN_VALUE)
152 return tok;
153 if (!isl_stream_eat_if_available(s, '^'))
154 return tok;
155 tok2 = isl_stream_next_token(s);
156 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
157 isl_stream_error(s, tok2, "expecting constant value");
158 goto error;
159 }
160
161 isl_int_pow_ui(tok->u.v, tok->u.v, isl_int_get_ui(tok2->u.v));
162
163 isl_token_free(tok2);
164 return tok;
165 error:
166 isl_token_free(tok);
167 isl_token_free(tok2);
168 return NULL;
169 }
170
171 static int accept_cst_factor(struct isl_stream *s, isl_int *f)
172 {
173 struct isl_token *tok;
174
175 tok = next_token(s);
176 if (!tok || tok->type != ISL_TOKEN_VALUE) {
177 isl_stream_error(s, tok, "expecting constant value");
178 goto error;
179 }
180
181 isl_int_mul(*f, *f, tok->u.v);
182
183 isl_token_free(tok);
184
185 if (isl_stream_eat_if_available(s, '*'))
186 return accept_cst_factor(s, f);
187
188 return 0;
189 error:
190 isl_token_free(tok);
191 return -1;
192 }
193
194 /* Given an affine expression aff, return an affine expression
195 * for aff % d, with d the next token on the stream, which is
196 * assumed to be a constant.
197 *
198 * We introduce an integer division q = [aff/d] and the result
199 * is set to aff - d q.
200 */
201 static __isl_give isl_pw_aff *affine_mod(struct isl_stream *s,
202 struct vars *v, __isl_take isl_pw_aff *aff)
203 {
204 struct isl_token *tok;
205 isl_pw_aff *q;
206
207 tok = next_token(s);
208 if (!tok || tok->type != ISL_TOKEN_VALUE) {
209 isl_stream_error(s, tok, "expecting constant value");
210 goto error;
211 }
212
213 q = isl_pw_aff_copy(aff);
214 q = isl_pw_aff_scale_down(q, tok->u.v);
215 q = isl_pw_aff_floor(q);
216 q = isl_pw_aff_scale(q, tok->u.v);
217
218 aff = isl_pw_aff_sub(aff, q);
219
220 isl_token_free(tok);
221 return aff;
222 error:
223 isl_pw_aff_free(aff);
224 isl_token_free(tok);
225 return NULL;
226 }
227
228 static __isl_give isl_pw_aff *accept_affine(struct isl_stream *s,
229 __isl_take isl_space *dim, struct vars *v);
230 static __isl_give isl_pw_aff_list *accept_affine_list(struct isl_stream *s,
231 __isl_take isl_space *dim, struct vars *v);
232
233 static __isl_give isl_pw_aff *accept_minmax(struct isl_stream *s,
234 __isl_take isl_space *dim, struct vars *v)
235 {
236 struct isl_token *tok;
237 isl_pw_aff_list *list = NULL;
238 int min;
239
240 tok = isl_stream_next_token(s);
241 if (!tok)
242 goto error;
243 min = tok->type == ISL_TOKEN_MIN;
244 isl_token_free(tok);
245
246 if (isl_stream_eat(s, '('))
247 goto error;
248
249 list = accept_affine_list(s, isl_space_copy(dim), v);
250 if (!list)
251 goto error;
252
253 if (isl_stream_eat(s, ')'))
254 goto error;
255
256 isl_space_free(dim);
257 return min ? isl_pw_aff_list_min(list) : isl_pw_aff_list_max(list);
258 error:
259 isl_space_free(dim);
260 isl_pw_aff_list_free(list);
261 return NULL;
262 }
263
264 static __isl_give isl_pw_aff *accept_div(struct isl_stream *s,
265 __isl_take isl_space *dim, struct vars *v)
266 {
267 struct isl_token *tok;
268 int f = 0;
269 int c = 0;
270 isl_pw_aff *pwaff = NULL;
271
272 if (isl_stream_eat_if_available(s, ISL_TOKEN_FLOORD))
273 f = 1;
274 else if (isl_stream_eat_if_available(s, ISL_TOKEN_CEILD))
275 c = 1;
276 if (f || c) {
277 if (isl_stream_eat(s, '('))
278 goto error;
279 } else {
280 if (isl_stream_eat(s, '['))
281 goto error;
282 }
283
284 pwaff = accept_affine(s, isl_space_copy(dim), v);
285
286 if (f || c) {
287 if (isl_stream_eat(s, ','))
288 goto error;
289
290 tok = next_token(s);
291 if (!tok)
292 goto error;
293 if (tok->type != ISL_TOKEN_VALUE) {
294 isl_stream_error(s, tok, "expected denominator");
295 isl_stream_push_token(s, tok);
296 goto error;
297 }
298 isl_pw_aff_scale_down(pwaff, tok->u.v);
299 isl_token_free(tok);
300 }
301
302 if (c)
303 pwaff = isl_pw_aff_ceil(pwaff);
304 else
305 pwaff = isl_pw_aff_floor(pwaff);
306
307 if (f || c) {
308 if (isl_stream_eat(s, ')'))
309 goto error;
310 } else {
311 if (isl_stream_eat(s, ']'))
312 goto error;
313 }
314
315 isl_space_free(dim);
316 return pwaff;
317 error:
318 isl_space_free(dim);
319 isl_pw_aff_free(pwaff);
320 return NULL;
321 }
322
323 static __isl_give isl_pw_aff *accept_affine_factor(struct isl_stream *s,
324 __isl_take isl_space *dim, struct vars *v)
325 {
326 struct isl_token *tok = NULL;
327 isl_pw_aff *res = NULL;
328
329 tok = next_token(s);
330 if (!tok) {
331 isl_stream_error(s, NULL, "unexpected EOF");
332 goto error;
333 }
334
335 if (tok->type == ISL_TOKEN_AFF) {
336 res = isl_pw_aff_copy(tok->u.pwaff);
337 isl_token_free(tok);
338 } else if (tok->type == ISL_TOKEN_IDENT) {
339 int n = v->n;
340 int pos = vars_pos(v, tok->u.s, -1);
341 isl_aff *aff;
342
343 if (pos < 0)
344 goto error;
345 if (pos >= n) {
346 vars_drop(v, v->n - n);
347 isl_stream_error(s, tok, "unknown identifier");
348 goto error;
349 }
350
351 aff = isl_aff_zero_on_domain(isl_local_space_from_space(isl_space_copy(dim)));
352 if (!aff)
353 goto error;
354 isl_int_set_si(aff->v->el[2 + pos], 1);
355 res = isl_pw_aff_from_aff(aff);
356 isl_token_free(tok);
357 } else if (tok->type == ISL_TOKEN_VALUE) {
358 if (isl_stream_eat_if_available(s, '*')) {
359 res = accept_affine_factor(s, isl_space_copy(dim), v);
360 res = isl_pw_aff_scale(res, tok->u.v);
361 } else {
362 isl_local_space *ls;
363 isl_aff *aff;
364 ls = isl_local_space_from_space(isl_space_copy(dim));
365 aff = isl_aff_zero_on_domain(ls);
366 aff = isl_aff_add_constant(aff, tok->u.v);
367 res = isl_pw_aff_from_aff(aff);
368 }
369 isl_token_free(tok);
370 } else if (tok->type == '(') {
371 isl_token_free(tok);
372 tok = NULL;
373 res = accept_affine(s, isl_space_copy(dim), v);
374 if (!res)
375 goto error;
376 if (isl_stream_eat(s, ')'))
377 goto error;
378 } else if (tok->type == '[' ||
379 tok->type == ISL_TOKEN_FLOORD ||
380 tok->type == ISL_TOKEN_CEILD) {
381 isl_stream_push_token(s, tok);
382 tok = NULL;
383 res = accept_div(s, isl_space_copy(dim), v);
384 } else if (tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX) {
385 isl_stream_push_token(s, tok);
386 tok = NULL;
387 res = accept_minmax(s, isl_space_copy(dim), v);
388 } else {
389 isl_stream_error(s, tok, "expecting factor");
390 goto error;
391 }
392 if (isl_stream_eat_if_available(s, '%') ||
393 isl_stream_eat_if_available(s, ISL_TOKEN_MOD)) {
394 isl_space_free(dim);
395 return affine_mod(s, v, res);
396 }
397 if (isl_stream_eat_if_available(s, '*')) {
398 isl_int f;
399 isl_int_init(f);
400 isl_int_set_si(f, 1);
401 if (accept_cst_factor(s, &f) < 0) {
402 isl_int_clear(f);
403 goto error2;
404 }
405 res = isl_pw_aff_scale(res, f);
406 isl_int_clear(f);
407 }
408 if (isl_stream_eat_if_available(s, '/')) {
409 isl_int f;
410 isl_int_init(f);
411 isl_int_set_si(f, 1);
412 if (accept_cst_factor(s, &f) < 0) {
413 isl_int_clear(f);
414 goto error2;
415 }
416 res = isl_pw_aff_scale_down(res, f);
417 isl_int_clear(f);
418 }
419
420 isl_space_free(dim);
421 return res;
422 error:
423 isl_token_free(tok);
424 error2:
425 isl_pw_aff_free(res);
426 isl_space_free(dim);
427 return NULL;
428 }
429
430 static __isl_give isl_pw_aff *add_cst(__isl_take isl_pw_aff *pwaff, isl_int v)
431 {
432 isl_aff *aff;
433 isl_space *space;
434
435 space = isl_pw_aff_get_domain_space(pwaff);
436 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
437 aff = isl_aff_add_constant(aff, v);
438
439 return isl_pw_aff_add(pwaff, isl_pw_aff_from_aff(aff));
440 }
441
442 static __isl_give isl_pw_aff *accept_affine(struct isl_stream *s,
443 __isl_take isl_space *dim, struct vars *v)
444 {
445 struct isl_token *tok = NULL;
446 isl_local_space *ls;
447 isl_pw_aff *res;
448 int sign = 1;
449
450 ls = isl_local_space_from_space(isl_space_copy(dim));
451 res = isl_pw_aff_from_aff(isl_aff_zero_on_domain(ls));
452 if (!res)
453 goto error;
454
455 for (;;) {
456 tok = next_token(s);
457 if (!tok) {
458 isl_stream_error(s, NULL, "unexpected EOF");
459 goto error;
460 }
461 if (tok->type == '-') {
462 sign = -sign;
463 isl_token_free(tok);
464 continue;
465 }
466 if (tok->type == '(' || tok->type == '[' ||
467 tok->type == ISL_TOKEN_MIN || tok->type == ISL_TOKEN_MAX ||
468 tok->type == ISL_TOKEN_FLOORD ||
469 tok->type == ISL_TOKEN_CEILD ||
470 tok->type == ISL_TOKEN_IDENT ||
471 tok->type == ISL_TOKEN_AFF) {
472 isl_pw_aff *term;
473 isl_stream_push_token(s, tok);
474 tok = NULL;
475 term = accept_affine_factor(s, isl_space_copy(dim), v);
476 if (sign < 0)
477 res = isl_pw_aff_sub(res, term);
478 else
479 res = isl_pw_aff_add(res, term);
480 if (!res)
481 goto error;
482 sign = 1;
483 } else if (tok->type == ISL_TOKEN_VALUE) {
484 if (sign < 0)
485 isl_int_neg(tok->u.v, tok->u.v);
486 if (isl_stream_eat_if_available(s, '*') ||
487 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
488 isl_pw_aff *term;
489 term = accept_affine_factor(s,
490 isl_space_copy(dim), v);
491 term = isl_pw_aff_scale(term, tok->u.v);
492 res = isl_pw_aff_add(res, term);
493 if (!res)
494 goto error;
495 } else {
496 res = add_cst(res, tok->u.v);
497 }
498 sign = 1;
499 } else {
500 isl_stream_error(s, tok, "unexpected isl_token");
501 isl_stream_push_token(s, tok);
502 isl_pw_aff_free(res);
503 isl_space_free(dim);
504 return NULL;
505 }
506 isl_token_free(tok);
507
508 tok = next_token(s);
509 if (tok && tok->type == '-') {
510 sign = -sign;
511 isl_token_free(tok);
512 } else if (tok && tok->type == '+') {
513 /* nothing */
514 isl_token_free(tok);
515 } else if (tok && tok->type == ISL_TOKEN_VALUE &&
516 isl_int_is_neg(tok->u.v)) {
517 isl_stream_push_token(s, tok);
518 } else {
519 if (tok)
520 isl_stream_push_token(s, tok);
521 break;
522 }
523 }
524
525 isl_space_free(dim);
526 return res;
527 error:
528 isl_space_free(dim);
529 isl_token_free(tok);
530 isl_pw_aff_free(res);
531 return NULL;
532 }
533
534 static int is_comparator(struct isl_token *tok)
535 {
536 if (!tok)
537 return 0;
538
539 switch (tok->type) {
540 case ISL_TOKEN_LT:
541 case ISL_TOKEN_GT:
542 case ISL_TOKEN_LE:
543 case ISL_TOKEN_GE:
544 case ISL_TOKEN_NE:
545 case '=':
546 return 1;
547 default:
548 return 0;
549 }
550 }
551
552 static struct isl_map *read_disjuncts(struct isl_stream *s,
553 struct vars *v, __isl_take isl_map *map, int rational);
554 static __isl_give isl_pw_aff *accept_extended_affine(struct isl_stream *s,
555 __isl_take isl_space *dim, struct vars *v, int rational);
556
557 /* Accept a ternary operator, given the first argument.
558 */
559 static __isl_give isl_pw_aff *accept_ternary(struct isl_stream *s,
560 __isl_take isl_map *cond, struct vars *v, int rational)
561 {
562 isl_space *dim;
563 isl_pw_aff *pwaff1 = NULL, *pwaff2 = NULL, *pa_cond;
564
565 if (!cond)
566 return NULL;
567
568 if (isl_stream_eat(s, '?'))
569 goto error;
570
571 dim = isl_space_wrap(isl_map_get_space(cond));
572 pwaff1 = accept_extended_affine(s, dim, v, rational);
573 if (!pwaff1)
574 goto error;
575
576 if (isl_stream_eat(s, ':'))
577 goto error;
578
579 dim = isl_pw_aff_get_domain_space(pwaff1);
580 pwaff2 = accept_extended_affine(s, dim, v, rational);
581 if (!pwaff1)
582 goto error;
583
584 pa_cond = isl_set_indicator_function(isl_map_wrap(cond));
585 return isl_pw_aff_cond(pa_cond, pwaff1, pwaff2);
586 error:
587 isl_map_free(cond);
588 isl_pw_aff_free(pwaff1);
589 isl_pw_aff_free(pwaff2);
590 return NULL;
591 }
592
593 /* Accept an affine expression that may involve ternary operators.
594 * We first read an affine expression.
595 * If it is not followed by a comparison operator, we simply return it.
596 * Otherwise, we assume the affine epxression is part of the first
597 * argument of a ternary operator and try to parse that.
598 */
599 static __isl_give isl_pw_aff *accept_extended_affine(struct isl_stream *s,
600 __isl_take isl_space *dim, struct vars *v, int rational)
601 {
602 isl_space *space;
603 isl_map *cond;
604 isl_pw_aff *pwaff;
605 struct isl_token *tok;
606 int line = -1, col = -1;
607 int is_comp;
608
609 tok = isl_stream_next_token(s);
610 if (tok) {
611 line = tok->line;
612 col = tok->col;
613 isl_stream_push_token(s, tok);
614 }
615
616 pwaff = accept_affine(s, dim, v);
617 if (rational)
618 pwaff = isl_pw_aff_set_rational(pwaff);
619 if (!pwaff)
620 return NULL;
621
622 tok = isl_stream_next_token(s);
623 if (!tok)
624 return isl_pw_aff_free(pwaff);
625
626 is_comp = is_comparator(tok);
627 isl_stream_push_token(s, tok);
628 if (!is_comp)
629 return pwaff;
630
631 tok = isl_token_new(s->ctx, line, col, 0);
632 if (!tok)
633 return isl_pw_aff_free(pwaff);
634 tok->type = ISL_TOKEN_AFF;
635 tok->u.pwaff = pwaff;
636
637 space = isl_pw_aff_get_domain_space(pwaff);
638 cond = isl_map_universe(isl_space_unwrap(space));
639
640 isl_stream_push_token(s, tok);
641
642 cond = read_disjuncts(s, v, cond, rational);
643
644 return accept_ternary(s, cond, v, rational);
645 }
646
647 static __isl_give isl_map *read_var_def(struct isl_stream *s,
648 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v,
649 int rational)
650 {
651 isl_pw_aff *def;
652 int pos;
653 isl_map *def_map;
654
655 if (type == isl_dim_param)
656 pos = isl_map_dim(map, isl_dim_param);
657 else {
658 pos = isl_map_dim(map, isl_dim_in);
659 if (type == isl_dim_out)
660 pos += isl_map_dim(map, isl_dim_out);
661 type = isl_dim_in;
662 }
663 --pos;
664
665 def = accept_extended_affine(s, isl_space_wrap(isl_map_get_space(map)),
666 v, rational);
667 def_map = isl_map_from_pw_aff(def);
668 def_map = isl_map_equate(def_map, type, pos, isl_dim_out, 0);
669 def_map = isl_set_unwrap(isl_map_domain(def_map));
670
671 map = isl_map_intersect(map, def_map);
672
673 return map;
674 }
675
676 static __isl_give isl_pw_aff_list *accept_affine_list(struct isl_stream *s,
677 __isl_take isl_space *dim, struct vars *v)
678 {
679 isl_pw_aff *pwaff;
680 isl_pw_aff_list *list;
681 struct isl_token *tok = NULL;
682
683 pwaff = accept_affine(s, isl_space_copy(dim), v);
684 list = isl_pw_aff_list_from_pw_aff(pwaff);
685 if (!list)
686 goto error;
687
688 for (;;) {
689 tok = isl_stream_next_token(s);
690 if (!tok) {
691 isl_stream_error(s, NULL, "unexpected EOF");
692 goto error;
693 }
694 if (tok->type != ',') {
695 isl_stream_push_token(s, tok);
696 break;
697 }
698 isl_token_free(tok);
699
700 pwaff = accept_affine(s, isl_space_copy(dim), v);
701 list = isl_pw_aff_list_concat(list,
702 isl_pw_aff_list_from_pw_aff(pwaff));
703 if (!list)
704 goto error;
705 }
706
707 isl_space_free(dim);
708 return list;
709 error:
710 isl_space_free(dim);
711 isl_pw_aff_list_free(list);
712 return NULL;
713 }
714
715 static __isl_give isl_map *read_defined_var_list(struct isl_stream *s,
716 struct vars *v, __isl_take isl_map *map, int rational)
717 {
718 struct isl_token *tok;
719
720 while ((tok = isl_stream_next_token(s)) != NULL) {
721 int p;
722 int n = v->n;
723
724 if (tok->type != ISL_TOKEN_IDENT)
725 break;
726
727 p = vars_pos(v, tok->u.s, -1);
728 if (p < 0)
729 goto error;
730 if (p < n) {
731 isl_stream_error(s, tok, "expecting unique identifier");
732 goto error;
733 }
734
735 map = isl_map_add_dims(map, isl_dim_out, 1);
736
737 isl_token_free(tok);
738 tok = isl_stream_next_token(s);
739 if (tok && tok->type == '=') {
740 isl_token_free(tok);
741 map = read_var_def(s, map, isl_dim_out, v, rational);
742 tok = isl_stream_next_token(s);
743 }
744
745 if (!tok || tok->type != ',')
746 break;
747
748 isl_token_free(tok);
749 }
750 if (tok)
751 isl_stream_push_token(s, tok);
752
753 return map;
754 error:
755 isl_token_free(tok);
756 isl_map_free(map);
757 return NULL;
758 }
759
760 static int next_is_tuple(struct isl_stream *s)
761 {
762 struct isl_token *tok;
763 int is_tuple;
764
765 tok = isl_stream_next_token(s);
766 if (!tok)
767 return 0;
768 if (tok->type == '[') {
769 isl_stream_push_token(s, tok);
770 return 1;
771 }
772 if (tok->type != ISL_TOKEN_IDENT && !tok->is_keyword) {
773 isl_stream_push_token(s, tok);
774 return 0;
775 }
776
777 is_tuple = isl_stream_next_token_is(s, '[');
778
779 isl_stream_push_token(s, tok);
780
781 return is_tuple;
782 }
783
784 /* Allocate an initial tuple with zero dimensions and an anonymous,
785 * unstructured space.
786 * A tuple is represented as an isl_multi_pw_aff.
787 * The range space is the space of the tuple.
788 * The domain space is an anonymous space
789 * with a dimension for each variable in the set of variables in "v".
790 * If a given dimension is not defined in terms of earlier dimensions in
791 * the input, then the corresponding isl_pw_aff is set equal to one time
792 * the variable corresponding to the dimension being defined.
793 */
794 static __isl_give isl_multi_pw_aff *tuple_alloc(struct vars *v)
795 {
796 return isl_multi_pw_aff_alloc(isl_space_alloc(v->ctx, 0, v->n, 0));
797 }
798
799 /* Is "pa" an expression in term of earlier dimensions?
800 * The alternative is that the dimension is defined to be equal to itself,
801 * meaning that it has a universe domain and an expression that depends
802 * on itself. "i" is the position of the expression in a sequence
803 * of "n" expressions. The final dimensions of "pa" correspond to
804 * these "n" expressions.
805 */
806 static int pw_aff_is_expr(__isl_keep isl_pw_aff *pa, int i, int n)
807 {
808 isl_aff *aff;
809
810 if (!pa)
811 return -1;
812 if (pa->n != 1)
813 return 1;
814 if (!isl_set_plain_is_universe(pa->p[0].set))
815 return 1;
816
817 aff = pa->p[0].aff;
818 if (isl_int_is_zero(aff->v->el[aff->v->size - n + i]))
819 return 1;
820 return 0;
821 }
822
823 /* Does the tuple contain any dimensions that are defined
824 * in terms of earlier dimensions?
825 */
826 static int tuple_has_expr(__isl_keep isl_multi_pw_aff *tuple)
827 {
828 int i, n;
829 int has_expr = 0;
830 isl_pw_aff *pa;
831
832 if (!tuple)
833 return -1;
834 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
835 for (i = 0; i < n; ++i) {
836 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
837 has_expr = pw_aff_is_expr(pa, i, n);
838 isl_pw_aff_free(pa);
839 if (has_expr < 0 || has_expr)
840 break;
841 }
842
843 return has_expr;
844 }
845
846 /* Add a dimension to the given tuple.
847 * The dimension is initially undefined, so it is encoded
848 * as one times itself.
849 */
850 static __isl_give isl_multi_pw_aff *tuple_add_dim(
851 __isl_take isl_multi_pw_aff *tuple, struct vars *v)
852 {
853 isl_space *space;
854 isl_aff *aff;
855 isl_pw_aff *pa;
856
857 tuple = isl_multi_pw_aff_add_dims(tuple, isl_dim_in, 1);
858 space = isl_multi_pw_aff_get_domain_space(tuple);
859 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
860 aff = isl_aff_add_coefficient_si(aff, isl_dim_in, v->n, 1);
861 pa = isl_pw_aff_from_aff(aff);
862 tuple = isl_multi_pw_aff_flat_range_product(tuple,
863 isl_multi_pw_aff_from_pw_aff(pa));
864
865 return tuple;
866 }
867
868 /* Set the name of dimension "pos" in "tuple" to "name".
869 * During printing, we add primes if the same name appears more than once
870 * to distinguish the occurrences. Here, we remove those primes from "name"
871 * before setting the name of the dimension.
872 */
873 static __isl_give isl_multi_pw_aff *tuple_set_dim_name(
874 __isl_take isl_multi_pw_aff *tuple, int pos, char *name)
875 {
876 char *prime;
877
878 if (!name)
879 return tuple;
880
881 prime = strchr(name, '\'');
882 if (prime)
883 *prime = '\0';
884 tuple = isl_multi_pw_aff_set_dim_name(tuple, isl_dim_set, pos, name);
885 if (prime)
886 *prime = '\'';
887
888 return tuple;
889 }
890
891 /* Read an affine expression from "s" and replace the definition
892 * of dimension "pos" in "tuple" by this expression.
893 *
894 * accept_extended_affine requires a wrapped space as input.
895 * The domain space of "tuple", on the other hand is an anonymous space,
896 * so we have to adjust the space of the isl_pw_aff before adding it
897 * to "tuple".
898 */
899 static __isl_give isl_multi_pw_aff *read_tuple_var_def(struct isl_stream *s,
900 __isl_take isl_multi_pw_aff *tuple, int pos, struct vars *v,
901 int rational)
902 {
903 isl_space *space;
904 isl_pw_aff *def;
905
906 space = isl_space_wrap(isl_space_alloc(s->ctx, 0, v->n, 0));
907 def = accept_extended_affine(s, space, v, rational);
908 space = isl_space_set_alloc(s->ctx, 0, v->n);
909 def = isl_pw_aff_reset_domain_space(def, space);
910 tuple = isl_multi_pw_aff_set_pw_aff(tuple, pos, def);
911
912 return tuple;
913 }
914
915 /* Read a list of variables and/or affine expressions and return the list
916 * as an isl_multi_pw_aff.
917 * The elements in the list are separated by either "," or "][".
918 * If "comma" is set then only "," is allowed.
919 */
920 static __isl_give isl_multi_pw_aff *read_tuple_var_list(struct isl_stream *s,
921 struct vars *v, int rational, int comma)
922 {
923 int i = 0;
924 struct isl_token *tok;
925 isl_multi_pw_aff *res;
926
927 res = tuple_alloc(v);
928
929 if (isl_stream_next_token_is(s, ']'))
930 return res;
931
932 while ((tok = next_token(s)) != NULL) {
933 int new_name = 0;
934
935 res = tuple_add_dim(res, v);
936
937 if (tok->type == ISL_TOKEN_IDENT) {
938 int n = v->n;
939 int p = vars_pos(v, tok->u.s, -1);
940 if (p < 0)
941 goto error;
942 new_name = p >= n;
943 }
944
945 if (tok->type == '*') {
946 if (vars_add_anon(v) < 0)
947 goto error;
948 isl_token_free(tok);
949 } else if (new_name) {
950 res = tuple_set_dim_name(res, i, v->v->name);
951 isl_token_free(tok);
952 if (isl_stream_eat_if_available(s, '='))
953 res = read_tuple_var_def(s, res, i, v,
954 rational);
955 } else {
956 isl_stream_push_token(s, tok);
957 tok = NULL;
958 if (vars_add_anon(v) < 0)
959 goto error;
960 res = read_tuple_var_def(s, res, i, v, rational);
961 }
962
963 tok = isl_stream_next_token(s);
964 if (!comma && tok && tok->type == ']' &&
965 isl_stream_next_token_is(s, '[')) {
966 isl_token_free(tok);
967 tok = isl_stream_next_token(s);
968 } else if (!tok || tok->type != ',')
969 break;
970
971 isl_token_free(tok);
972 i++;
973 }
974 if (tok)
975 isl_stream_push_token(s, tok);
976
977 return res;
978 error:
979 isl_token_free(tok);
980 return isl_multi_pw_aff_free(res);
981 }
982
983 /* Read a tuple and represent it as an isl_multi_pw_aff. See tuple_alloc.
984 */
985 static __isl_give isl_multi_pw_aff *read_tuple(struct isl_stream *s,
986 struct vars *v, int rational, int comma)
987 {
988 struct isl_token *tok;
989 char *name = NULL;
990 isl_multi_pw_aff *res = NULL;
991
992 tok = isl_stream_next_token(s);
993 if (!tok)
994 goto error;
995 if (tok->type == ISL_TOKEN_IDENT || tok->is_keyword) {
996 name = strdup(tok->u.s);
997 isl_token_free(tok);
998 if (!name)
999 goto error;
1000 } else
1001 isl_stream_push_token(s, tok);
1002 if (isl_stream_eat(s, '['))
1003 goto error;
1004 if (next_is_tuple(s)) {
1005 isl_multi_pw_aff *out;
1006 int n;
1007 res = read_tuple(s, v, rational, comma);
1008 if (isl_stream_eat(s, ISL_TOKEN_TO))
1009 goto error;
1010 out = read_tuple(s, v, rational, comma);
1011 n = isl_multi_pw_aff_dim(out, isl_dim_out);
1012 res = isl_multi_pw_aff_add_dims(res, isl_dim_in, n);
1013 res = isl_multi_pw_aff_range_product(res, out);
1014 } else
1015 res = read_tuple_var_list(s, v, rational, comma);
1016 if (isl_stream_eat(s, ']'))
1017 goto error;
1018
1019 if (name) {
1020 res = isl_multi_pw_aff_set_tuple_name(res, isl_dim_out, name);
1021 free(name);
1022 }
1023
1024 return res;
1025 error:
1026 free(name);
1027 return isl_multi_pw_aff_free(res);
1028 }
1029
1030 /* Read a tuple from "s" and add it to "map".
1031 * The tuple is initially represented as an isl_multi_pw_aff.
1032 * We first create the appropriate space in "map" based on the range
1033 * space of this isl_multi_pw_aff. Then, we add equalities based
1034 * on the affine expressions. These live in an anonymous space,
1035 * however, so we first need to reset the space to that of "map".
1036 */
1037 static __isl_give isl_map *read_map_tuple(struct isl_stream *s,
1038 __isl_take isl_map *map, enum isl_dim_type type, struct vars *v,
1039 int rational, int comma)
1040 {
1041 int i, n;
1042 isl_multi_pw_aff *tuple;
1043 isl_space *space = NULL;
1044
1045 tuple = read_tuple(s, v, rational, comma);
1046 if (!tuple)
1047 goto error;
1048
1049 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
1050 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
1051 if (!space)
1052 goto error;
1053
1054 if (type == isl_dim_param) {
1055 if (isl_space_has_tuple_name(space, isl_dim_set) ||
1056 isl_space_is_wrapping(space)) {
1057 isl_die(s->ctx, isl_error_invalid,
1058 "parameter tuples cannot be named or nested",
1059 goto error);
1060 }
1061 map = isl_map_add_dims(map, type, n);
1062 for (i = 0; i < n; ++i) {
1063 isl_id *id;
1064 if (!isl_space_has_dim_name(space, isl_dim_set, i))
1065 isl_die(s->ctx, isl_error_invalid,
1066 "parameters must be named",
1067 goto error);
1068 id = isl_space_get_dim_id(space, isl_dim_set, i);
1069 map = isl_map_set_dim_id(map, isl_dim_param, i, id);
1070 }
1071 } else if (type == isl_dim_in) {
1072 isl_set *set;
1073
1074 set = isl_set_universe(isl_space_copy(space));
1075 if (rational)
1076 set = isl_set_set_rational(set);
1077 set = isl_set_intersect_params(set, isl_map_params(map));
1078 map = isl_map_from_domain(set);
1079 } else {
1080 isl_set *set;
1081
1082 set = isl_set_universe(isl_space_copy(space));
1083 if (rational)
1084 set = isl_set_set_rational(set);
1085 map = isl_map_from_domain_and_range(isl_map_domain(map), set);
1086 }
1087
1088 for (i = 0; i < n; ++i) {
1089 isl_pw_aff *pa;
1090 isl_space *space;
1091 isl_aff *aff;
1092 isl_set *set;
1093 isl_map *map_i;
1094
1095 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
1096 space = isl_pw_aff_get_domain_space(pa);
1097 aff = isl_aff_zero_on_domain(isl_local_space_from_space(space));
1098 aff = isl_aff_add_coefficient_si(aff,
1099 isl_dim_in, v->n - n + i, -1);
1100 pa = isl_pw_aff_add(pa, isl_pw_aff_from_aff(aff));
1101 if (rational)
1102 pa = isl_pw_aff_set_rational(pa);
1103 set = isl_pw_aff_zero_set(pa);
1104 map_i = isl_map_from_range(set);
1105 map_i = isl_map_reset_space(map_i, isl_map_get_space(map));
1106 map = isl_map_intersect(map, map_i);
1107 }
1108
1109 isl_space_free(space);
1110 isl_multi_pw_aff_free(tuple);
1111 return map;
1112 error:
1113 isl_space_free(space);
1114 isl_multi_pw_aff_free(tuple);
1115 isl_map_free(map);
1116 return NULL;
1117 }
1118
1119 static __isl_give isl_set *construct_constraints(
1120 __isl_take isl_set *set, int type,
1121 __isl_keep isl_pw_aff_list *left, __isl_keep isl_pw_aff_list *right,
1122 int rational)
1123 {
1124 isl_set *cond;
1125
1126 left = isl_pw_aff_list_copy(left);
1127 right = isl_pw_aff_list_copy(right);
1128 if (rational) {
1129 left = isl_pw_aff_list_set_rational(left);
1130 right = isl_pw_aff_list_set_rational(right);
1131 }
1132 if (type == ISL_TOKEN_LE)
1133 cond = isl_pw_aff_list_le_set(left, right);
1134 else if (type == ISL_TOKEN_GE)
1135 cond = isl_pw_aff_list_ge_set(left, right);
1136 else if (type == ISL_TOKEN_LT)
1137 cond = isl_pw_aff_list_lt_set(left, right);
1138 else if (type == ISL_TOKEN_GT)
1139 cond = isl_pw_aff_list_gt_set(left, right);
1140 else if (type == ISL_TOKEN_NE)
1141 cond = isl_pw_aff_list_ne_set(left, right);
1142 else
1143 cond = isl_pw_aff_list_eq_set(left, right);
1144
1145 return isl_set_intersect(set, cond);
1146 }
1147
1148 static __isl_give isl_map *add_constraint(struct isl_stream *s,
1149 struct vars *v, __isl_take isl_map *map, int rational)
1150 {
1151 struct isl_token *tok = NULL;
1152 isl_pw_aff_list *list1 = NULL, *list2 = NULL;
1153 isl_set *set;
1154
1155 set = isl_map_wrap(map);
1156 list1 = accept_affine_list(s, isl_set_get_space(set), v);
1157 if (!list1)
1158 goto error;
1159 tok = isl_stream_next_token(s);
1160 if (!is_comparator(tok)) {
1161 isl_stream_error(s, tok, "missing operator");
1162 if (tok)
1163 isl_stream_push_token(s, tok);
1164 tok = NULL;
1165 goto error;
1166 }
1167 for (;;) {
1168 list2 = accept_affine_list(s, isl_set_get_space(set), v);
1169 if (!list2)
1170 goto error;
1171
1172 set = construct_constraints(set, tok->type, list1, list2,
1173 rational);
1174 isl_token_free(tok);
1175 isl_pw_aff_list_free(list1);
1176 list1 = list2;
1177
1178 tok = isl_stream_next_token(s);
1179 if (!is_comparator(tok)) {
1180 if (tok)
1181 isl_stream_push_token(s, tok);
1182 break;
1183 }
1184 }
1185 isl_pw_aff_list_free(list1);
1186
1187 return isl_set_unwrap(set);
1188 error:
1189 if (tok)
1190 isl_token_free(tok);
1191 isl_pw_aff_list_free(list1);
1192 isl_pw_aff_list_free(list2);
1193 isl_set_free(set);
1194 return NULL;
1195 }
1196
1197 static __isl_give isl_map *read_exists(struct isl_stream *s,
1198 struct vars *v, __isl_take isl_map *map, int rational)
1199 {
1200 int n = v->n;
1201 int seen_paren = isl_stream_eat_if_available(s, '(');
1202
1203 map = isl_map_from_domain(isl_map_wrap(map));
1204 map = read_defined_var_list(s, v, map, rational);
1205
1206 if (isl_stream_eat(s, ':'))
1207 goto error;
1208
1209 map = read_disjuncts(s, v, map, rational);
1210 map = isl_set_unwrap(isl_map_domain(map));
1211
1212 vars_drop(v, v->n - n);
1213 if (seen_paren && isl_stream_eat(s, ')'))
1214 goto error;
1215
1216 return map;
1217 error:
1218 isl_map_free(map);
1219 return NULL;
1220 }
1221
1222 /* Parse an expression between parentheses and push the result
1223 * back on the stream.
1224 *
1225 * The parsed expression may be either an affine expression
1226 * or a condition. The first type is pushed onto the stream
1227 * as an isl_pw_aff, while the second is pushed as an isl_map.
1228 *
1229 * If the initial token indicates the start of a condition,
1230 * we parse it as such.
1231 * Otherwise, we first parse an affine expression and push
1232 * that onto the stream. If the affine expression covers the
1233 * entire expression between parentheses, we return.
1234 * Otherwise, we assume that the affine expression is the
1235 * start of a condition and continue parsing.
1236 */
1237 static int resolve_paren_expr(struct isl_stream *s,
1238 struct vars *v, __isl_take isl_map *map, int rational)
1239 {
1240 struct isl_token *tok, *tok2;
1241 int line, col;
1242 isl_pw_aff *pwaff;
1243
1244 tok = isl_stream_next_token(s);
1245 if (!tok || tok->type != '(')
1246 goto error;
1247
1248 if (isl_stream_next_token_is(s, '('))
1249 if (resolve_paren_expr(s, v, isl_map_copy(map), rational))
1250 goto error;
1251
1252 if (isl_stream_next_token_is(s, ISL_TOKEN_EXISTS) ||
1253 isl_stream_next_token_is(s, ISL_TOKEN_NOT) ||
1254 isl_stream_next_token_is(s, ISL_TOKEN_TRUE) ||
1255 isl_stream_next_token_is(s, ISL_TOKEN_FALSE) ||
1256 isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1257 map = read_disjuncts(s, v, map, rational);
1258 if (isl_stream_eat(s, ')'))
1259 goto error;
1260 tok->type = ISL_TOKEN_MAP;
1261 tok->u.map = map;
1262 isl_stream_push_token(s, tok);
1263 return 0;
1264 }
1265
1266 tok2 = isl_stream_next_token(s);
1267 if (!tok2)
1268 goto error;
1269 line = tok2->line;
1270 col = tok2->col;
1271 isl_stream_push_token(s, tok2);
1272
1273 pwaff = accept_affine(s, isl_space_wrap(isl_map_get_space(map)), v);
1274 if (!pwaff)
1275 goto error;
1276
1277 tok2 = isl_token_new(s->ctx, line, col, 0);
1278 if (!tok2)
1279 goto error2;
1280 tok2->type = ISL_TOKEN_AFF;
1281 tok2->u.pwaff = pwaff;
1282
1283 if (isl_stream_eat_if_available(s, ')')) {
1284 isl_stream_push_token(s, tok2);
1285 isl_token_free(tok);
1286 isl_map_free(map);
1287 return 0;
1288 }
1289
1290 isl_stream_push_token(s, tok2);
1291
1292 map = read_disjuncts(s, v, map, rational);
1293 if (isl_stream_eat(s, ')'))
1294 goto error;
1295
1296 tok->type = ISL_TOKEN_MAP;
1297 tok->u.map = map;
1298 isl_stream_push_token(s, tok);
1299
1300 return 0;
1301 error2:
1302 isl_pw_aff_free(pwaff);
1303 error:
1304 isl_token_free(tok);
1305 isl_map_free(map);
1306 return -1;
1307 }
1308
1309 static __isl_give isl_map *read_conjunct(struct isl_stream *s,
1310 struct vars *v, __isl_take isl_map *map, int rational)
1311 {
1312 if (isl_stream_next_token_is(s, '('))
1313 if (resolve_paren_expr(s, v, isl_map_copy(map), rational))
1314 goto error;
1315
1316 if (isl_stream_next_token_is(s, ISL_TOKEN_MAP)) {
1317 struct isl_token *tok;
1318 tok = isl_stream_next_token(s);
1319 if (!tok)
1320 goto error;
1321 isl_map_free(map);
1322 map = isl_map_copy(tok->u.map);
1323 isl_token_free(tok);
1324 return map;
1325 }
1326
1327 if (isl_stream_eat_if_available(s, ISL_TOKEN_EXISTS))
1328 return read_exists(s, v, map, rational);
1329
1330 if (isl_stream_eat_if_available(s, ISL_TOKEN_TRUE))
1331 return map;
1332
1333 if (isl_stream_eat_if_available(s, ISL_TOKEN_FALSE)) {
1334 isl_space *dim = isl_map_get_space(map);
1335 isl_map_free(map);
1336 return isl_map_empty(dim);
1337 }
1338
1339 return add_constraint(s, v, map, rational);
1340 error:
1341 isl_map_free(map);
1342 return NULL;
1343 }
1344
1345 static __isl_give isl_map *read_conjuncts(struct isl_stream *s,
1346 struct vars *v, __isl_take isl_map *map, int rational)
1347 {
1348 isl_map *res;
1349 int negate;
1350
1351 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1352 res = read_conjunct(s, v, isl_map_copy(map), rational);
1353 if (negate)
1354 res = isl_map_subtract(isl_map_copy(map), res);
1355
1356 while (res && isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
1357 isl_map *res_i;
1358
1359 negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
1360 res_i = read_conjunct(s, v, isl_map_copy(map), rational);
1361 if (negate)
1362 res = isl_map_subtract(res, res_i);
1363 else
1364 res = isl_map_intersect(res, res_i);
1365 }
1366
1367 isl_map_free(map);
1368 return res;
1369 }
1370
1371 static struct isl_map *read_disjuncts(struct isl_stream *s,
1372 struct vars *v, __isl_take isl_map *map, int rational)
1373 {
1374 isl_map *res;
1375
1376 if (isl_stream_next_token_is(s, '}')) {
1377 isl_space *dim = isl_map_get_space(map);
1378 isl_map_free(map);
1379 return isl_map_universe(dim);
1380 }
1381
1382 res = read_conjuncts(s, v, isl_map_copy(map), rational);
1383 while (isl_stream_eat_if_available(s, ISL_TOKEN_OR)) {
1384 isl_map *res_i;
1385
1386 res_i = read_conjuncts(s, v, isl_map_copy(map), rational);
1387 res = isl_map_union(res, res_i);
1388 }
1389
1390 isl_map_free(map);
1391 return res;
1392 }
1393
1394 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
1395 {
1396 if (pos < isl_basic_map_dim(bmap, isl_dim_out))
1397 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1398 isl_basic_map_dim(bmap, isl_dim_in) + pos;
1399 pos -= isl_basic_map_dim(bmap, isl_dim_out);
1400
1401 if (pos < isl_basic_map_dim(bmap, isl_dim_in))
1402 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
1403 pos -= isl_basic_map_dim(bmap, isl_dim_in);
1404
1405 if (pos < isl_basic_map_dim(bmap, isl_dim_div))
1406 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
1407 isl_basic_map_dim(bmap, isl_dim_in) +
1408 isl_basic_map_dim(bmap, isl_dim_out) + pos;
1409 pos -= isl_basic_map_dim(bmap, isl_dim_div);
1410
1411 if (pos < isl_basic_map_dim(bmap, isl_dim_param))
1412 return 1 + pos;
1413
1414 return 0;
1415 }
1416
1417 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
1418 struct isl_stream *s, __isl_take isl_basic_map *bmap)
1419 {
1420 int j;
1421 struct isl_token *tok;
1422 int type;
1423 int k;
1424 isl_int *c;
1425 unsigned nparam;
1426 unsigned dim;
1427
1428 if (!bmap)
1429 return NULL;
1430
1431 nparam = isl_basic_map_dim(bmap, isl_dim_param);
1432 dim = isl_basic_map_dim(bmap, isl_dim_out);
1433
1434 tok = isl_stream_next_token(s);
1435 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1436 isl_stream_error(s, tok, "expecting coefficient");
1437 if (tok)
1438 isl_stream_push_token(s, tok);
1439 goto error;
1440 }
1441 if (!tok->on_new_line) {
1442 isl_stream_error(s, tok, "coefficient should appear on new line");
1443 isl_stream_push_token(s, tok);
1444 goto error;
1445 }
1446
1447 type = isl_int_get_si(tok->u.v);
1448 isl_token_free(tok);
1449
1450 isl_assert(s->ctx, type == 0 || type == 1, goto error);
1451 if (type == 0) {
1452 k = isl_basic_map_alloc_equality(bmap);
1453 c = bmap->eq[k];
1454 } else {
1455 k = isl_basic_map_alloc_inequality(bmap);
1456 c = bmap->ineq[k];
1457 }
1458 if (k < 0)
1459 goto error;
1460
1461 for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
1462 int pos;
1463 tok = isl_stream_next_token(s);
1464 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1465 isl_stream_error(s, tok, "expecting coefficient");
1466 if (tok)
1467 isl_stream_push_token(s, tok);
1468 goto error;
1469 }
1470 if (tok->on_new_line) {
1471 isl_stream_error(s, tok,
1472 "coefficient should not appear on new line");
1473 isl_stream_push_token(s, tok);
1474 goto error;
1475 }
1476 pos = polylib_pos_to_isl_pos(bmap, j);
1477 isl_int_set(c[pos], tok->u.v);
1478 isl_token_free(tok);
1479 }
1480
1481 return bmap;
1482 error:
1483 isl_basic_map_free(bmap);
1484 return NULL;
1485 }
1486
1487 static __isl_give isl_basic_map *basic_map_read_polylib(struct isl_stream *s)
1488 {
1489 int i;
1490 struct isl_token *tok;
1491 struct isl_token *tok2;
1492 int n_row, n_col;
1493 int on_new_line;
1494 unsigned in = 0, out, local = 0;
1495 struct isl_basic_map *bmap = NULL;
1496 int nparam = 0;
1497
1498 tok = isl_stream_next_token(s);
1499 if (!tok) {
1500 isl_stream_error(s, NULL, "unexpected EOF");
1501 return NULL;
1502 }
1503 tok2 = isl_stream_next_token(s);
1504 if (!tok2) {
1505 isl_token_free(tok);
1506 isl_stream_error(s, NULL, "unexpected EOF");
1507 return NULL;
1508 }
1509 if (tok->type != ISL_TOKEN_VALUE || tok2->type != ISL_TOKEN_VALUE) {
1510 isl_stream_push_token(s, tok2);
1511 isl_stream_push_token(s, tok);
1512 isl_stream_error(s, NULL,
1513 "expecting constraint matrix dimensions");
1514 return NULL;
1515 }
1516 n_row = isl_int_get_si(tok->u.v);
1517 n_col = isl_int_get_si(tok2->u.v);
1518 on_new_line = tok2->on_new_line;
1519 isl_token_free(tok2);
1520 isl_token_free(tok);
1521 isl_assert(s->ctx, !on_new_line, return NULL);
1522 isl_assert(s->ctx, n_row >= 0, return NULL);
1523 isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
1524 tok = isl_stream_next_token_on_same_line(s);
1525 if (tok) {
1526 if (tok->type != ISL_TOKEN_VALUE) {
1527 isl_stream_error(s, tok,
1528 "expecting number of output dimensions");
1529 isl_stream_push_token(s, tok);
1530 goto error;
1531 }
1532 out = isl_int_get_si(tok->u.v);
1533 isl_token_free(tok);
1534
1535 tok = isl_stream_next_token_on_same_line(s);
1536 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1537 isl_stream_error(s, tok,
1538 "expecting number of input dimensions");
1539 if (tok)
1540 isl_stream_push_token(s, tok);
1541 goto error;
1542 }
1543 in = isl_int_get_si(tok->u.v);
1544 isl_token_free(tok);
1545
1546 tok = isl_stream_next_token_on_same_line(s);
1547 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1548 isl_stream_error(s, tok,
1549 "expecting number of existentials");
1550 if (tok)
1551 isl_stream_push_token(s, tok);
1552 goto error;
1553 }
1554 local = isl_int_get_si(tok->u.v);
1555 isl_token_free(tok);
1556
1557 tok = isl_stream_next_token_on_same_line(s);
1558 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1559 isl_stream_error(s, tok,
1560 "expecting number of parameters");
1561 if (tok)
1562 isl_stream_push_token(s, tok);
1563 goto error;
1564 }
1565 nparam = isl_int_get_si(tok->u.v);
1566 isl_token_free(tok);
1567 if (n_col != 1 + out + in + local + nparam + 1) {
1568 isl_stream_error(s, NULL,
1569 "dimensions don't match");
1570 goto error;
1571 }
1572 } else
1573 out = n_col - 2 - nparam;
1574 bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
1575 if (!bmap)
1576 return NULL;
1577
1578 for (i = 0; i < local; ++i) {
1579 int k = isl_basic_map_alloc_div(bmap);
1580 if (k < 0)
1581 goto error;
1582 isl_seq_clr(bmap->div[k], 1 + 1 + nparam + in + out + local);
1583 }
1584
1585 for (i = 0; i < n_row; ++i)
1586 bmap = basic_map_read_polylib_constraint(s, bmap);
1587
1588 tok = isl_stream_next_token_on_same_line(s);
1589 if (tok) {
1590 isl_stream_error(s, tok, "unexpected extra token on line");
1591 isl_stream_push_token(s, tok);
1592 goto error;
1593 }
1594
1595 bmap = isl_basic_map_simplify(bmap);
1596 bmap = isl_basic_map_finalize(bmap);
1597 return bmap;
1598 error:
1599 isl_basic_map_free(bmap);
1600 return NULL;
1601 }
1602
1603 static struct isl_map *map_read_polylib(struct isl_stream *s)
1604 {
1605 struct isl_token *tok;
1606 struct isl_token *tok2;
1607 int i, n;
1608 struct isl_map *map;
1609
1610 tok = isl_stream_next_token(s);
1611 if (!tok) {
1612 isl_stream_error(s, NULL, "unexpected EOF");
1613 return NULL;
1614 }
1615 tok2 = isl_stream_next_token_on_same_line(s);
1616 if (tok2 && tok2->type == ISL_TOKEN_VALUE) {
1617 isl_stream_push_token(s, tok2);
1618 isl_stream_push_token(s, tok);
1619 return isl_map_from_basic_map(basic_map_read_polylib(s));
1620 }
1621 if (tok2) {
1622 isl_stream_error(s, tok2, "unexpected token");
1623 isl_stream_push_token(s, tok2);
1624 isl_stream_push_token(s, tok);
1625 return NULL;
1626 }
1627 n = isl_int_get_si(tok->u.v);
1628 isl_token_free(tok);
1629
1630 isl_assert(s->ctx, n >= 1, return NULL);
1631
1632 map = isl_map_from_basic_map(basic_map_read_polylib(s));
1633
1634 for (i = 1; map && i < n; ++i)
1635 map = isl_map_union(map,
1636 isl_map_from_basic_map(basic_map_read_polylib(s)));
1637
1638 return map;
1639 }
1640
1641 static int optional_power(struct isl_stream *s)
1642 {
1643 int pow;
1644 struct isl_token *tok;
1645
1646 tok = isl_stream_next_token(s);
1647 if (!tok)
1648 return 1;
1649 if (tok->type != '^') {
1650 isl_stream_push_token(s, tok);
1651 return 1;
1652 }
1653 isl_token_free(tok);
1654 tok = isl_stream_next_token(s);
1655 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1656 isl_stream_error(s, tok, "expecting exponent");
1657 if (tok)
1658 isl_stream_push_token(s, tok);
1659 return 1;
1660 }
1661 pow = isl_int_get_si(tok->u.v);
1662 isl_token_free(tok);
1663 return pow;
1664 }
1665
1666 static __isl_give isl_pw_qpolynomial *read_term(struct isl_stream *s,
1667 __isl_keep isl_map *map, struct vars *v);
1668
1669 static __isl_give isl_pw_qpolynomial *read_factor(struct isl_stream *s,
1670 __isl_keep isl_map *map, struct vars *v)
1671 {
1672 isl_pw_qpolynomial *pwqp;
1673 struct isl_token *tok;
1674
1675 tok = next_token(s);
1676 if (!tok) {
1677 isl_stream_error(s, NULL, "unexpected EOF");
1678 return NULL;
1679 }
1680 if (tok->type == '(') {
1681 int pow;
1682
1683 isl_token_free(tok);
1684 pwqp = read_term(s, map, v);
1685 if (!pwqp)
1686 return NULL;
1687 if (isl_stream_eat(s, ')'))
1688 goto error;
1689 pow = optional_power(s);
1690 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
1691 } else if (tok->type == ISL_TOKEN_VALUE) {
1692 struct isl_token *tok2;
1693 tok2 = isl_stream_next_token(s);
1694 isl_qpolynomial *qp;
1695 if (tok2 && tok2->type == '/') {
1696 isl_token_free(tok2);
1697 tok2 = next_token(s);
1698 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
1699 isl_stream_error(s, tok2, "expected denominator");
1700 isl_token_free(tok);
1701 isl_token_free(tok2);
1702 return NULL;
1703 }
1704 qp = isl_qpolynomial_rat_cst_on_domain(isl_map_get_space(map),
1705 tok->u.v, tok2->u.v);
1706 isl_token_free(tok2);
1707 } else {
1708 isl_stream_push_token(s, tok2);
1709 qp = isl_qpolynomial_cst_on_domain(isl_map_get_space(map),
1710 tok->u.v);
1711 }
1712 isl_token_free(tok);
1713 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1714 } else if (tok->type == ISL_TOKEN_INFTY) {
1715 isl_qpolynomial *qp;
1716 isl_token_free(tok);
1717 qp = isl_qpolynomial_infty_on_domain(isl_map_get_space(map));
1718 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1719 } else if (tok->type == ISL_TOKEN_NAN) {
1720 isl_qpolynomial *qp;
1721 isl_token_free(tok);
1722 qp = isl_qpolynomial_nan_on_domain(isl_map_get_space(map));
1723 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1724 } else if (tok->type == ISL_TOKEN_IDENT) {
1725 int n = v->n;
1726 int pos = vars_pos(v, tok->u.s, -1);
1727 int pow;
1728 isl_qpolynomial *qp;
1729 if (pos < 0) {
1730 isl_token_free(tok);
1731 return NULL;
1732 }
1733 if (pos >= n) {
1734 vars_drop(v, v->n - n);
1735 isl_stream_error(s, tok, "unknown identifier");
1736 isl_token_free(tok);
1737 return NULL;
1738 }
1739 isl_token_free(tok);
1740 pow = optional_power(s);
1741 qp = isl_qpolynomial_var_pow_on_domain(isl_map_get_space(map), pos, pow);
1742 pwqp = isl_pw_qpolynomial_from_qpolynomial(qp);
1743 } else if (tok->type == '[') {
1744 isl_pw_aff *pwaff;
1745 int pow;
1746
1747 isl_stream_push_token(s, tok);
1748 pwaff = accept_div(s, isl_map_get_space(map), v);
1749 pow = optional_power(s);
1750 pwqp = isl_pw_qpolynomial_from_pw_aff(pwaff);
1751 pwqp = isl_pw_qpolynomial_pow(pwqp, pow);
1752 } else if (tok->type == '-') {
1753 isl_token_free(tok);
1754 pwqp = read_factor(s, map, v);
1755 pwqp = isl_pw_qpolynomial_neg(pwqp);
1756 } else {
1757 isl_stream_error(s, tok, "unexpected isl_token");
1758 isl_stream_push_token(s, tok);
1759 return NULL;
1760 }
1761
1762 if (isl_stream_eat_if_available(s, '*') ||
1763 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
1764 isl_pw_qpolynomial *pwqp2;
1765
1766 pwqp2 = read_factor(s, map, v);
1767 pwqp = isl_pw_qpolynomial_mul(pwqp, pwqp2);
1768 }
1769
1770 return pwqp;
1771 error:
1772 isl_pw_qpolynomial_free(pwqp);
1773 return NULL;
1774 }
1775
1776 static __isl_give isl_pw_qpolynomial *read_term(struct isl_stream *s,
1777 __isl_keep isl_map *map, struct vars *v)
1778 {
1779 struct isl_token *tok;
1780 isl_pw_qpolynomial *pwqp;
1781
1782 pwqp = read_factor(s, map, v);
1783
1784 for (;;) {
1785 tok = next_token(s);
1786 if (!tok)
1787 return pwqp;
1788
1789 if (tok->type == '+') {
1790 isl_pw_qpolynomial *pwqp2;
1791
1792 isl_token_free(tok);
1793 pwqp2 = read_factor(s, map, v);
1794 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
1795 } else if (tok->type == '-') {
1796 isl_pw_qpolynomial *pwqp2;
1797
1798 isl_token_free(tok);
1799 pwqp2 = read_factor(s, map, v);
1800 pwqp = isl_pw_qpolynomial_sub(pwqp, pwqp2);
1801 } else if (tok->type == ISL_TOKEN_VALUE &&
1802 isl_int_is_neg(tok->u.v)) {
1803 isl_pw_qpolynomial *pwqp2;
1804
1805 isl_stream_push_token(s, tok);
1806 pwqp2 = read_factor(s, map, v);
1807 pwqp = isl_pw_qpolynomial_add(pwqp, pwqp2);
1808 } else {
1809 isl_stream_push_token(s, tok);
1810 break;
1811 }
1812 }
1813
1814 return pwqp;
1815 }
1816
1817 static __isl_give isl_map *read_optional_disjuncts(struct isl_stream *s,
1818 __isl_take isl_map *map, struct vars *v, int rational)
1819 {
1820 struct isl_token *tok;
1821
1822 tok = isl_stream_next_token(s);
1823 if (!tok) {
1824 isl_stream_error(s, NULL, "unexpected EOF");
1825 goto error;
1826 }
1827 if (tok->type == ':' ||
1828 (tok->type == ISL_TOKEN_OR && !strcmp(tok->u.s, "|"))) {
1829 isl_token_free(tok);
1830 map = read_disjuncts(s, v, map, rational);
1831 } else
1832 isl_stream_push_token(s, tok);
1833
1834 return map;
1835 error:
1836 isl_map_free(map);
1837 return NULL;
1838 }
1839
1840 static struct isl_obj obj_read_poly(struct isl_stream *s,
1841 __isl_take isl_map *map, struct vars *v, int n)
1842 {
1843 struct isl_obj obj = { isl_obj_pw_qpolynomial, NULL };
1844 isl_pw_qpolynomial *pwqp;
1845 struct isl_set *set;
1846
1847 pwqp = read_term(s, map, v);
1848 map = read_optional_disjuncts(s, map, v, 0);
1849 set = isl_map_range(map);
1850
1851 pwqp = isl_pw_qpolynomial_intersect_domain(pwqp, set);
1852
1853 vars_drop(v, v->n - n);
1854
1855 obj.v = pwqp;
1856 return obj;
1857 }
1858
1859 static struct isl_obj obj_read_poly_or_fold(struct isl_stream *s,
1860 __isl_take isl_set *set, struct vars *v, int n)
1861 {
1862 struct isl_obj obj = { isl_obj_pw_qpolynomial_fold, NULL };
1863 isl_pw_qpolynomial *pwqp;
1864 isl_pw_qpolynomial_fold *pwf = NULL;
1865
1866 if (!isl_stream_eat_if_available(s, ISL_TOKEN_MAX))
1867 return obj_read_poly(s, set, v, n);
1868
1869 if (isl_stream_eat(s, '('))
1870 goto error;
1871
1872 pwqp = read_term(s, set, v);
1873 pwf = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max, pwqp);
1874
1875 while (isl_stream_eat_if_available(s, ',')) {
1876 isl_pw_qpolynomial_fold *pwf_i;
1877 pwqp = read_term(s, set, v);
1878 pwf_i = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max,
1879 pwqp);
1880 pwf = isl_pw_qpolynomial_fold_fold(pwf, pwf_i);
1881 }
1882
1883 if (isl_stream_eat(s, ')'))
1884 goto error;
1885
1886 set = read_optional_disjuncts(s, set, v, 0);
1887 pwf = isl_pw_qpolynomial_fold_intersect_domain(pwf, set);
1888
1889 vars_drop(v, v->n - n);
1890
1891 obj.v = pwf;
1892 return obj;
1893 error:
1894 isl_set_free(set);
1895 isl_pw_qpolynomial_fold_free(pwf);
1896 obj.type = isl_obj_none;
1897 return obj;
1898 }
1899
1900 static int is_rational(struct isl_stream *s)
1901 {
1902 struct isl_token *tok;
1903
1904 tok = isl_stream_next_token(s);
1905 if (!tok)
1906 return 0;
1907 if (tok->type == ISL_TOKEN_RAT && isl_stream_next_token_is(s, ':')) {
1908 isl_token_free(tok);
1909 isl_stream_eat(s, ':');
1910 return 1;
1911 }
1912
1913 isl_stream_push_token(s, tok);
1914
1915 return 0;
1916 }
1917
1918 static struct isl_obj obj_read_body(struct isl_stream *s,
1919 __isl_take isl_map *map, struct vars *v)
1920 {
1921 struct isl_token *tok;
1922 struct isl_obj obj = { isl_obj_set, NULL };
1923 int n = v->n;
1924 int rational;
1925
1926 rational = is_rational(s);
1927 if (rational)
1928 map = isl_map_set_rational(map);
1929
1930 if (isl_stream_next_token_is(s, ':')) {
1931 obj.type = isl_obj_set;
1932 obj.v = read_optional_disjuncts(s, map, v, rational);
1933 return obj;
1934 }
1935
1936 if (!next_is_tuple(s))
1937 return obj_read_poly_or_fold(s, map, v, n);
1938
1939 map = read_map_tuple(s, map, isl_dim_in, v, rational, 0);
1940 if (!map)
1941 goto error;
1942 tok = isl_stream_next_token(s);
1943 if (!tok)
1944 goto error;
1945 if (tok->type == ISL_TOKEN_TO) {
1946 obj.type = isl_obj_map;
1947 isl_token_free(tok);
1948 if (!next_is_tuple(s)) {
1949 isl_set *set = isl_map_domain(map);
1950 return obj_read_poly_or_fold(s, set, v, n);
1951 }
1952 map = read_map_tuple(s, map, isl_dim_out, v, rational, 0);
1953 if (!map)
1954 goto error;
1955 } else {
1956 map = isl_map_domain(map);
1957 isl_stream_push_token(s, tok);
1958 }
1959
1960 map = read_optional_disjuncts(s, map, v, rational);
1961
1962 vars_drop(v, v->n - n);
1963
1964 obj.v = map;
1965 return obj;
1966 error:
1967 isl_map_free(map);
1968 obj.type = isl_obj_none;
1969 return obj;
1970 }
1971
1972 static struct isl_obj to_union(isl_ctx *ctx, struct isl_obj obj)
1973 {
1974 if (obj.type == isl_obj_map) {
1975 obj.v = isl_union_map_from_map(obj.v);
1976 obj.type = isl_obj_union_map;
1977 } else if (obj.type == isl_obj_set) {
1978 obj.v = isl_union_set_from_set(obj.v);
1979 obj.type = isl_obj_union_set;
1980 } else if (obj.type == isl_obj_pw_qpolynomial) {
1981 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
1982 obj.type = isl_obj_union_pw_qpolynomial;
1983 } else if (obj.type == isl_obj_pw_qpolynomial_fold) {
1984 obj.v = isl_union_pw_qpolynomial_fold_from_pw_qpolynomial_fold(obj.v);
1985 obj.type = isl_obj_union_pw_qpolynomial_fold;
1986 } else
1987 isl_assert(ctx, 0, goto error);
1988 return obj;
1989 error:
1990 obj.type->free(obj.v);
1991 obj.type = isl_obj_none;
1992 return obj;
1993 }
1994
1995 static struct isl_obj obj_add(struct isl_ctx *ctx,
1996 struct isl_obj obj1, struct isl_obj obj2)
1997 {
1998 if (obj1.type == isl_obj_set && obj2.type == isl_obj_union_set)
1999 obj1 = to_union(ctx, obj1);
2000 if (obj1.type == isl_obj_union_set && obj2.type == isl_obj_set)
2001 obj2 = to_union(ctx, obj2);
2002 if (obj1.type == isl_obj_map && obj2.type == isl_obj_union_map)
2003 obj1 = to_union(ctx, obj1);
2004 if (obj1.type == isl_obj_union_map && obj2.type == isl_obj_map)
2005 obj2 = to_union(ctx, obj2);
2006 if (obj1.type == isl_obj_pw_qpolynomial &&
2007 obj2.type == isl_obj_union_pw_qpolynomial)
2008 obj1 = to_union(ctx, obj1);
2009 if (obj1.type == isl_obj_union_pw_qpolynomial &&
2010 obj2.type == isl_obj_pw_qpolynomial)
2011 obj2 = to_union(ctx, obj2);
2012 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
2013 obj2.type == isl_obj_union_pw_qpolynomial_fold)
2014 obj1 = to_union(ctx, obj1);
2015 if (obj1.type == isl_obj_union_pw_qpolynomial_fold &&
2016 obj2.type == isl_obj_pw_qpolynomial_fold)
2017 obj2 = to_union(ctx, obj2);
2018 isl_assert(ctx, obj1.type == obj2.type, goto error);
2019 if (obj1.type == isl_obj_map && !isl_map_has_equal_space(obj1.v, obj2.v)) {
2020 obj1 = to_union(ctx, obj1);
2021 obj2 = to_union(ctx, obj2);
2022 }
2023 if (obj1.type == isl_obj_set && !isl_set_has_equal_space(obj1.v, obj2.v)) {
2024 obj1 = to_union(ctx, obj1);
2025 obj2 = to_union(ctx, obj2);
2026 }
2027 if (obj1.type == isl_obj_pw_qpolynomial &&
2028 !isl_pw_qpolynomial_has_equal_space(obj1.v, obj2.v)) {
2029 obj1 = to_union(ctx, obj1);
2030 obj2 = to_union(ctx, obj2);
2031 }
2032 if (obj1.type == isl_obj_pw_qpolynomial_fold &&
2033 !isl_pw_qpolynomial_fold_has_equal_space(obj1.v, obj2.v)) {
2034 obj1 = to_union(ctx, obj1);
2035 obj2 = to_union(ctx, obj2);
2036 }
2037 obj1.v = obj1.type->add(obj1.v, obj2.v);
2038 return obj1;
2039 error:
2040 obj1.type->free(obj1.v);
2041 obj2.type->free(obj2.v);
2042 obj1.type = isl_obj_none;
2043 obj1.v = NULL;
2044 return obj1;
2045 }
2046
2047 static struct isl_obj obj_read(struct isl_stream *s)
2048 {
2049 isl_map *map = NULL;
2050 struct isl_token *tok;
2051 struct vars *v = NULL;
2052 struct isl_obj obj = { isl_obj_set, NULL };
2053
2054 tok = next_token(s);
2055 if (!tok) {
2056 isl_stream_error(s, NULL, "unexpected EOF");
2057 goto error;
2058 }
2059 if (tok->type == ISL_TOKEN_VALUE) {
2060 struct isl_token *tok2;
2061 struct isl_map *map;
2062
2063 tok2 = isl_stream_next_token(s);
2064 if (!tok2 || tok2->type != ISL_TOKEN_VALUE ||
2065 isl_int_is_neg(tok2->u.v)) {
2066 if (tok2)
2067 isl_stream_push_token(s, tok2);
2068 obj.type = isl_obj_int;
2069 obj.v = isl_int_obj_alloc(s->ctx, tok->u.v);
2070 isl_token_free(tok);
2071 return obj;
2072 }
2073 isl_stream_push_token(s, tok2);
2074 isl_stream_push_token(s, tok);
2075 map = map_read_polylib(s);
2076 if (!map)
2077 goto error;
2078 if (isl_map_may_be_set(map))
2079 obj.v = isl_map_range(map);
2080 else {
2081 obj.type = isl_obj_map;
2082 obj.v = map;
2083 }
2084 return obj;
2085 }
2086 v = vars_new(s->ctx);
2087 if (!v) {
2088 isl_stream_push_token(s, tok);
2089 goto error;
2090 }
2091 map = isl_map_universe(isl_space_params_alloc(s->ctx, 0));
2092 if (tok->type == '[') {
2093 isl_stream_push_token(s, tok);
2094 map = read_map_tuple(s, map, isl_dim_param, v, 0, 0);
2095 if (!map)
2096 goto error;
2097 tok = isl_stream_next_token(s);
2098 if (!tok || tok->type != ISL_TOKEN_TO) {
2099 isl_stream_error(s, tok, "expecting '->'");
2100 if (tok)
2101 isl_stream_push_token(s, tok);
2102 goto error;
2103 }
2104 isl_token_free(tok);
2105 tok = isl_stream_next_token(s);
2106 }
2107 if (!tok || tok->type != '{') {
2108 isl_stream_error(s, tok, "expecting '{'");
2109 if (tok)
2110 isl_stream_push_token(s, tok);
2111 goto error;
2112 }
2113 isl_token_free(tok);
2114
2115 tok = isl_stream_next_token(s);
2116 if (!tok)
2117 ;
2118 else if (tok->type == ISL_TOKEN_IDENT && !strcmp(tok->u.s, "Sym")) {
2119 isl_token_free(tok);
2120 if (isl_stream_eat(s, '='))
2121 goto error;
2122 map = read_map_tuple(s, map, isl_dim_param, v, 0, 1);
2123 if (!map)
2124 goto error;
2125 } else if (tok->type == '}') {
2126 obj.type = isl_obj_union_set;
2127 obj.v = isl_union_set_empty(isl_map_get_space(map));
2128 isl_token_free(tok);
2129 goto done;
2130 } else
2131 isl_stream_push_token(s, tok);
2132
2133 for (;;) {
2134 struct isl_obj o;
2135 tok = NULL;
2136 o = obj_read_body(s, isl_map_copy(map), v);
2137 if (o.type == isl_obj_none || !o.v)
2138 goto error;
2139 if (!obj.v)
2140 obj = o;
2141 else {
2142 obj = obj_add(s->ctx, obj, o);
2143 if (obj.type == isl_obj_none || !obj.v)
2144 goto error;
2145 }
2146 tok = isl_stream_next_token(s);
2147 if (!tok || tok->type != ';')
2148 break;
2149 isl_token_free(tok);
2150 if (isl_stream_next_token_is(s, '}')) {
2151 tok = isl_stream_next_token(s);
2152 break;
2153 }
2154 }
2155
2156 if (tok && tok->type == '}') {
2157 isl_token_free(tok);
2158 } else {
2159 isl_stream_error(s, tok, "unexpected isl_token");
2160 if (tok)
2161 isl_token_free(tok);
2162 goto error;
2163 }
2164 done:
2165 vars_free(v);
2166 isl_map_free(map);
2167
2168 return obj;
2169 error:
2170 isl_map_free(map);
2171 obj.type->free(obj.v);
2172 if (v)
2173 vars_free(v);
2174 obj.v = NULL;
2175 return obj;
2176 }
2177
2178 struct isl_obj isl_stream_read_obj(struct isl_stream *s)
2179 {
2180 return obj_read(s);
2181 }
2182
2183 __isl_give isl_map *isl_stream_read_map(struct isl_stream *s)
2184 {
2185 struct isl_obj obj;
2186
2187 obj = obj_read(s);
2188 if (obj.v)
2189 isl_assert(s->ctx, obj.type == isl_obj_map ||
2190 obj.type == isl_obj_set, goto error);
2191
2192 if (obj.type == isl_obj_set)
2193 obj.v = isl_map_from_range(obj.v);
2194
2195 return obj.v;
2196 error:
2197 obj.type->free(obj.v);
2198 return NULL;
2199 }
2200
2201 __isl_give isl_set *isl_stream_read_set(struct isl_stream *s)
2202 {
2203 struct isl_obj obj;
2204
2205 obj = obj_read(s);
2206 if (obj.v) {
2207 if (obj.type == isl_obj_map && isl_map_may_be_set(obj.v)) {
2208 obj.v = isl_map_range(obj.v);
2209 obj.type = isl_obj_set;
2210 }
2211 isl_assert(s->ctx, obj.type == isl_obj_set, goto error);
2212 }
2213
2214 return obj.v;
2215 error:
2216 obj.type->free(obj.v);
2217 return NULL;
2218 }
2219
2220 __isl_give isl_union_map *isl_stream_read_union_map(struct isl_stream *s)
2221 {
2222 struct isl_obj obj;
2223
2224 obj = obj_read(s);
2225 if (obj.type == isl_obj_map) {
2226 obj.type = isl_obj_union_map;
2227 obj.v = isl_union_map_from_map(obj.v);
2228 }
2229 if (obj.type == isl_obj_set) {
2230 obj.type = isl_obj_union_set;
2231 obj.v = isl_union_set_from_set(obj.v);
2232 }
2233 if (obj.v && obj.type == isl_obj_union_set &&
2234 isl_union_set_is_empty(obj.v))
2235 obj.type = isl_obj_union_map;
2236 if (obj.v && obj.type != isl_obj_union_map)
2237 isl_die(s->ctx, isl_error_invalid, "invalid input", goto error);
2238
2239 return obj.v;
2240 error:
2241 obj.type->free(obj.v);
2242 return NULL;
2243 }
2244
2245 __isl_give isl_union_set *isl_stream_read_union_set(struct isl_stream *s)
2246 {
2247 struct isl_obj obj;
2248
2249 obj = obj_read(s);
2250 if (obj.type == isl_obj_set) {
2251 obj.type = isl_obj_union_set;
2252 obj.v = isl_union_set_from_set(obj.v);
2253 }
2254 if (obj.v)
2255 isl_assert(s->ctx, obj.type == isl_obj_union_set, goto error);
2256
2257 return obj.v;
2258 error:
2259 obj.type->free(obj.v);
2260 return NULL;
2261 }
2262
2263 static __isl_give isl_basic_map *basic_map_read(struct isl_stream *s)
2264 {
2265 struct isl_obj obj;
2266 struct isl_map *map;
2267 struct isl_basic_map *bmap;
2268
2269 obj = obj_read(s);
2270 map = obj.v;
2271 if (!map)
2272 return NULL;
2273
2274 isl_assert(map->ctx, map->n <= 1, goto error);
2275
2276 if (map->n == 0)
2277 bmap = isl_basic_map_empty_like_map(map);
2278 else
2279 bmap = isl_basic_map_copy(map->p[0]);
2280
2281 isl_map_free(map);
2282
2283 return bmap;
2284 error:
2285 isl_map_free(map);
2286 return NULL;
2287 }
2288
2289 static __isl_give isl_basic_set *basic_set_read(struct isl_stream *s)
2290 {
2291 isl_basic_map *bmap;
2292 bmap = basic_map_read(s);
2293 if (!bmap)
2294 return NULL;
2295 if (!isl_basic_map_may_be_set(bmap))
2296 isl_die(s->ctx, isl_error_invalid,
2297 "input is not a set", goto error);
2298 return isl_basic_map_range(bmap);
2299 error:
2300 isl_basic_map_free(bmap);
2301 return NULL;
2302 }
2303
2304 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
2305 FILE *input)
2306 {
2307 struct isl_basic_map *bmap;
2308 struct isl_stream *s = isl_stream_new_file(ctx, input);
2309 if (!s)
2310 return NULL;
2311 bmap = basic_map_read(s);
2312 isl_stream_free(s);
2313 return bmap;
2314 }
2315
2316 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
2317 FILE *input)
2318 {
2319 isl_basic_set *bset;
2320 struct isl_stream *s = isl_stream_new_file(ctx, input);
2321 if (!s)
2322 return NULL;
2323 bset = basic_set_read(s);
2324 isl_stream_free(s);
2325 return bset;
2326 }
2327
2328 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
2329 const char *str)
2330 {
2331 struct isl_basic_map *bmap;
2332 struct isl_stream *s = isl_stream_new_str(ctx, str);
2333 if (!s)
2334 return NULL;
2335 bmap = basic_map_read(s);
2336 isl_stream_free(s);
2337 return bmap;
2338 }
2339
2340 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
2341 const char *str)
2342 {
2343 isl_basic_set *bset;
2344 struct isl_stream *s = isl_stream_new_str(ctx, str);
2345 if (!s)
2346 return NULL;
2347 bset = basic_set_read(s);
2348 isl_stream_free(s);
2349 return bset;
2350 }
2351
2352 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
2353 FILE *input)
2354 {
2355 struct isl_map *map;
2356 struct isl_stream *s = isl_stream_new_file(ctx, input);
2357 if (!s)
2358 return NULL;
2359 map = isl_stream_read_map(s);
2360 isl_stream_free(s);
2361 return map;
2362 }
2363
2364 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
2365 const char *str)
2366 {
2367 struct isl_map *map;
2368 struct isl_stream *s = isl_stream_new_str(ctx, str);
2369 if (!s)
2370 return NULL;
2371 map = isl_stream_read_map(s);
2372 isl_stream_free(s);
2373 return map;
2374 }
2375
2376 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
2377 FILE *input)
2378 {
2379 isl_set *set;
2380 struct isl_stream *s = isl_stream_new_file(ctx, input);
2381 if (!s)
2382 return NULL;
2383 set = isl_stream_read_set(s);
2384 isl_stream_free(s);
2385 return set;
2386 }
2387
2388 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
2389 const char *str)
2390 {
2391 isl_set *set;
2392 struct isl_stream *s = isl_stream_new_str(ctx, str);
2393 if (!s)
2394 return NULL;
2395 set = isl_stream_read_set(s);
2396 isl_stream_free(s);
2397 return set;
2398 }
2399
2400 __isl_give isl_union_map *isl_union_map_read_from_file(isl_ctx *ctx,
2401 FILE *input)
2402 {
2403 isl_union_map *umap;
2404 struct isl_stream *s = isl_stream_new_file(ctx, input);
2405 if (!s)
2406 return NULL;
2407 umap = isl_stream_read_union_map(s);
2408 isl_stream_free(s);
2409 return umap;
2410 }
2411
2412 __isl_give isl_union_map *isl_union_map_read_from_str(struct isl_ctx *ctx,
2413 const char *str)
2414 {
2415 isl_union_map *umap;
2416 struct isl_stream *s = isl_stream_new_str(ctx, str);
2417 if (!s)
2418 return NULL;
2419 umap = isl_stream_read_union_map(s);
2420 isl_stream_free(s);
2421 return umap;
2422 }
2423
2424 __isl_give isl_union_set *isl_union_set_read_from_file(isl_ctx *ctx,
2425 FILE *input)
2426 {
2427 isl_union_set *uset;
2428 struct isl_stream *s = isl_stream_new_file(ctx, input);
2429 if (!s)
2430 return NULL;
2431 uset = isl_stream_read_union_set(s);
2432 isl_stream_free(s);
2433 return uset;
2434 }
2435
2436 __isl_give isl_union_set *isl_union_set_read_from_str(struct isl_ctx *ctx,
2437 const char *str)
2438 {
2439 isl_union_set *uset;
2440 struct isl_stream *s = isl_stream_new_str(ctx, str);
2441 if (!s)
2442 return NULL;
2443 uset = isl_stream_read_union_set(s);
2444 isl_stream_free(s);
2445 return uset;
2446 }
2447
2448 static __isl_give isl_vec *isl_vec_read_polylib(struct isl_stream *s)
2449 {
2450 struct isl_vec *vec = NULL;
2451 struct isl_token *tok;
2452 unsigned size;
2453 int j;
2454
2455 tok = isl_stream_next_token(s);
2456 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2457 isl_stream_error(s, tok, "expecting vector length");
2458 goto error;
2459 }
2460
2461 size = isl_int_get_si(tok->u.v);
2462 isl_token_free(tok);
2463
2464 vec = isl_vec_alloc(s->ctx, size);
2465
2466 for (j = 0; j < size; ++j) {
2467 tok = isl_stream_next_token(s);
2468 if (!tok || tok->type != ISL_TOKEN_VALUE) {
2469 isl_stream_error(s, tok, "expecting constant value");
2470 goto error;
2471 }
2472 isl_int_set(vec->el[j], tok->u.v);
2473 isl_token_free(tok);
2474 }
2475
2476 return vec;
2477 error:
2478 isl_token_free(tok);
2479 isl_vec_free(vec);
2480 return NULL;
2481 }
2482
2483 static __isl_give isl_vec *vec_read(struct isl_stream *s)
2484 {
2485 return isl_vec_read_polylib(s);
2486 }
2487
2488 __isl_give isl_vec *isl_vec_read_from_file(isl_ctx *ctx, FILE *input)
2489 {
2490 isl_vec *v;
2491 struct isl_stream *s = isl_stream_new_file(ctx, input);
2492 if (!s)
2493 return NULL;
2494 v = vec_read(s);
2495 isl_stream_free(s);
2496 return v;
2497 }
2498
2499 __isl_give isl_pw_qpolynomial *isl_stream_read_pw_qpolynomial(
2500 struct isl_stream *s)
2501 {
2502 struct isl_obj obj;
2503
2504 obj = obj_read(s);
2505 if (obj.v)
2506 isl_assert(s->ctx, obj.type == isl_obj_pw_qpolynomial,
2507 goto error);
2508
2509 return obj.v;
2510 error:
2511 obj.type->free(obj.v);
2512 return NULL;
2513 }
2514
2515 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_str(isl_ctx *ctx,
2516 const char *str)
2517 {
2518 isl_pw_qpolynomial *pwqp;
2519 struct isl_stream *s = isl_stream_new_str(ctx, str);
2520 if (!s)
2521 return NULL;
2522 pwqp = isl_stream_read_pw_qpolynomial(s);
2523 isl_stream_free(s);
2524 return pwqp;
2525 }
2526
2527 __isl_give isl_pw_qpolynomial *isl_pw_qpolynomial_read_from_file(isl_ctx *ctx,
2528 FILE *input)
2529 {
2530 isl_pw_qpolynomial *pwqp;
2531 struct isl_stream *s = isl_stream_new_file(ctx, input);
2532 if (!s)
2533 return NULL;
2534 pwqp = isl_stream_read_pw_qpolynomial(s);
2535 isl_stream_free(s);
2536 return pwqp;
2537 }
2538
2539 /* Is the next token an identifer not in "v"?
2540 */
2541 static int next_is_fresh_ident(struct isl_stream *s, struct vars *v)
2542 {
2543 int n = v->n;
2544 int fresh;
2545 struct isl_token *tok;
2546
2547 tok = isl_stream_next_token(s);
2548 if (!tok)
2549 return 0;
2550 fresh = tok->type == ISL_TOKEN_IDENT && vars_pos(v, tok->u.s, -1) >= n;
2551 isl_stream_push_token(s, tok);
2552
2553 vars_drop(v, v->n - n);
2554
2555 return fresh;
2556 }
2557
2558 /* First read the domain of the affine expression, which may be
2559 * a parameter space or a set.
2560 * The tricky part is that we don't know if the domain is a set or not,
2561 * so when we are trying to read the domain, we may actually be reading
2562 * the affine expression itself (defined on a parameter domains)
2563 * If the tuple we are reading is named, we assume it's the domain.
2564 * Also, if inside the tuple, the first thing we find is a nested tuple
2565 * or a new identifier, we again assume it's the domain.
2566 * Otherwise, we assume we are reading an affine expression.
2567 */
2568 static __isl_give isl_set *read_aff_domain(struct isl_stream *s,
2569 __isl_take isl_set *dom, struct vars *v)
2570 {
2571 struct isl_token *tok;
2572
2573 tok = isl_stream_next_token(s);
2574 if (tok && (tok->type == ISL_TOKEN_IDENT || tok->is_keyword)) {
2575 isl_stream_push_token(s, tok);
2576 return read_map_tuple(s, dom, isl_dim_set, v, 1, 0);
2577 }
2578 if (!tok || tok->type != '[') {
2579 isl_stream_error(s, tok, "expecting '['");
2580 goto error;
2581 }
2582 if (next_is_tuple(s) || next_is_fresh_ident(s, v)) {
2583 isl_stream_push_token(s, tok);
2584 dom = read_map_tuple(s, dom, isl_dim_set, v, 1, 0);
2585 } else
2586 isl_stream_push_token(s, tok);
2587
2588 return dom;
2589 error:
2590 if (tok)
2591 isl_stream_push_token(s, tok);
2592 isl_set_free(dom);
2593 return NULL;
2594 }
2595
2596 /* Read an affine expression from "s".
2597 */
2598 __isl_give isl_aff *isl_stream_read_aff(struct isl_stream *s)
2599 {
2600 isl_aff *aff;
2601 isl_multi_aff *ma;
2602
2603 ma = isl_stream_read_multi_aff(s);
2604 if (!ma)
2605 return NULL;
2606 if (isl_multi_aff_dim(ma, isl_dim_out) != 1)
2607 isl_die(s->ctx, isl_error_invalid,
2608 "expecting single affine expression",
2609 goto error);
2610
2611 aff = isl_multi_aff_get_aff(ma, 0);
2612 isl_multi_aff_free(ma);
2613 return aff;
2614 error:
2615 isl_multi_aff_free(ma);
2616 return NULL;
2617 }
2618
2619 /* Read a piecewise affine expression from "s" with domain (space) "dom".
2620 */
2621 static __isl_give isl_pw_aff *read_pw_aff_with_dom(struct isl_stream *s,
2622 __isl_take isl_set *dom, struct vars *v)
2623 {
2624 isl_pw_aff *pwaff = NULL;
2625
2626 if (!isl_set_is_params(dom) && isl_stream_eat(s, ISL_TOKEN_TO))
2627 goto error;
2628
2629 if (isl_stream_eat(s, '['))
2630 goto error;
2631
2632 pwaff = accept_affine(s, isl_set_get_space(dom), v);
2633
2634 if (isl_stream_eat(s, ']'))
2635 goto error;
2636
2637 dom = read_optional_disjuncts(s, dom, v, 0);
2638 pwaff = isl_pw_aff_intersect_domain(pwaff, dom);
2639
2640 return pwaff;
2641 error:
2642 isl_set_free(dom);
2643 isl_pw_aff_free(pwaff);
2644 return NULL;
2645 }
2646
2647 __isl_give isl_pw_aff *isl_stream_read_pw_aff(struct isl_stream *s)
2648 {
2649 struct vars *v;
2650 isl_set *dom = NULL;
2651 isl_set *aff_dom;
2652 isl_pw_aff *pa = NULL;
2653 int n;
2654
2655 v = vars_new(s->ctx);
2656 if (!v)
2657 return NULL;
2658
2659 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
2660 if (next_is_tuple(s)) {
2661 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
2662 if (isl_stream_eat(s, ISL_TOKEN_TO))
2663 goto error;
2664 }
2665 if (isl_stream_eat(s, '{'))
2666 goto error;
2667
2668 n = v->n;
2669 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
2670 pa = read_pw_aff_with_dom(s, aff_dom, v);
2671 vars_drop(v, v->n - n);
2672
2673 while (isl_stream_eat_if_available(s, ';')) {
2674 isl_pw_aff *pa_i;
2675
2676 n = v->n;
2677 aff_dom = read_aff_domain(s, isl_set_copy(dom), v);
2678 pa_i = read_pw_aff_with_dom(s, aff_dom, v);
2679 vars_drop(v, v->n - n);
2680
2681 pa = isl_pw_aff_union_add(pa, pa_i);
2682 }
2683
2684 if (isl_stream_eat(s, '}'))
2685 goto error;
2686
2687 vars_free(v);
2688 isl_set_free(dom);
2689 return pa;
2690 error:
2691 vars_free(v);
2692 isl_set_free(dom);
2693 isl_pw_aff_free(pa);
2694 return NULL;
2695 }
2696
2697 __isl_give isl_aff *isl_aff_read_from_str(isl_ctx *ctx, const char *str)
2698 {
2699 isl_aff *aff;
2700 struct isl_stream *s = isl_stream_new_str(ctx, str);
2701 if (!s)
2702 return NULL;
2703 aff = isl_stream_read_aff(s);
2704 isl_stream_free(s);
2705 return aff;
2706 }
2707
2708 __isl_give isl_pw_aff *isl_pw_aff_read_from_str(isl_ctx *ctx, const char *str)
2709 {
2710 isl_pw_aff *pa;
2711 struct isl_stream *s = isl_stream_new_str(ctx, str);
2712 if (!s)
2713 return NULL;
2714 pa = isl_stream_read_pw_aff(s);
2715 isl_stream_free(s);
2716 return pa;
2717 }
2718
2719 /* Read an isl_pw_multi_aff from "s".
2720 * We currently read a generic object and if it turns out to be a set or
2721 * a map, we convert that to an isl_pw_multi_aff.
2722 * It would be more efficient if we were to construct the isl_pw_multi_aff
2723 * directly.
2724 */
2725 __isl_give isl_pw_multi_aff *isl_stream_read_pw_multi_aff(struct isl_stream *s)
2726 {
2727 struct isl_obj obj;
2728
2729 obj = obj_read(s);
2730 if (!obj.v)
2731 return NULL;
2732
2733 if (obj.type == isl_obj_map)
2734 return isl_pw_multi_aff_from_map(obj.v);
2735 if (obj.type == isl_obj_set)
2736 return isl_pw_multi_aff_from_set(obj.v);
2737
2738 obj.type->free(obj.v);
2739 isl_die(s->ctx, isl_error_invalid, "unexpected object type",
2740 return NULL);
2741 }
2742
2743 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_read_from_str(isl_ctx *ctx,
2744 const char *str)
2745 {
2746 isl_pw_multi_aff *pma;
2747 struct isl_stream *s = isl_stream_new_str(ctx, str);
2748 if (!s)
2749 return NULL;
2750 pma = isl_stream_read_pw_multi_aff(s);
2751 isl_stream_free(s);
2752 return pma;
2753 }
2754
2755 /* Read an isl_union_pw_multi_aff from "s".
2756 * We currently read a generic object and if it turns out to be a set or
2757 * a map, we convert that to an isl_union_pw_multi_aff.
2758 * It would be more efficient if we were to construct
2759 * the isl_union_pw_multi_aff directly.
2760 */
2761 __isl_give isl_union_pw_multi_aff *isl_stream_read_union_pw_multi_aff(
2762 struct isl_stream *s)
2763 {
2764 struct isl_obj obj;
2765
2766 obj = obj_read(s);
2767 if (!obj.v)
2768 return NULL;
2769
2770 if (obj.type == isl_obj_map || obj.type == isl_obj_set)
2771 obj = to_union(s->ctx, obj);
2772 if (obj.type == isl_obj_union_map)
2773 return isl_union_pw_multi_aff_from_union_map(obj.v);
2774 if (obj.type == isl_obj_union_set)
2775 return isl_union_pw_multi_aff_from_union_set(obj.v);
2776
2777 obj.type->free(obj.v);
2778 isl_die(s->ctx, isl_error_invalid, "unexpected object type",
2779 return NULL);
2780 }
2781
2782 /* Read an isl_union_pw_multi_aff from "str".
2783 */
2784 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_read_from_str(
2785 isl_ctx *ctx, const char *str)
2786 {
2787 isl_union_pw_multi_aff *upma;
2788 struct isl_stream *s = isl_stream_new_str(ctx, str);
2789 if (!s)
2790 return NULL;
2791 upma = isl_stream_read_union_pw_multi_aff(s);
2792 isl_stream_free(s);
2793 return upma;
2794 }
2795
2796 /* Assuming "pa" represents a single affine expression defined on a universe
2797 * domain, extract this affine expression.
2798 */
2799 static __isl_give isl_aff *aff_from_pw_aff(__isl_take isl_pw_aff *pa)
2800 {
2801 isl_aff *aff;
2802
2803 if (!pa)
2804 return NULL;
2805 if (pa->n != 1)
2806 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
2807 "expecting single affine expression",
2808 goto error);
2809 if (!isl_set_plain_is_universe(pa->p[0].set))
2810 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
2811 "expecting universe domain",
2812 goto error);
2813
2814 aff = isl_aff_copy(pa->p[0].aff);
2815 isl_pw_aff_free(pa);
2816 return aff;
2817 error:
2818 isl_pw_aff_free(pa);
2819 return NULL;
2820 }
2821
2822 /* Read a multi-affine expression from "s".
2823 * If the multi-affine expression has a domain, then then tuple
2824 * representing this domain cannot involve any affine expressions.
2825 * The tuple representing the actual expressions needs to consist
2826 * of only affine expressions. Moreover, these expressions can
2827 * only depend on parameters and input dimensions and not on other
2828 * output dimensions.
2829 */
2830 __isl_give isl_multi_aff *isl_stream_read_multi_aff(struct isl_stream *s)
2831 {
2832 struct vars *v;
2833 isl_set *dom = NULL;
2834 isl_multi_pw_aff *tuple = NULL;
2835 int dim, i, n;
2836 isl_space *space, *dom_space;
2837 isl_multi_aff *ma = NULL;
2838
2839 v = vars_new(s->ctx);
2840 if (!v)
2841 return NULL;
2842
2843 dom = isl_set_universe(isl_space_params_alloc(s->ctx, 0));
2844 if (next_is_tuple(s)) {
2845 dom = read_map_tuple(s, dom, isl_dim_param, v, 1, 0);
2846 if (isl_stream_eat(s, ISL_TOKEN_TO))
2847 goto error;
2848 }
2849 if (!isl_set_plain_is_universe(dom))
2850 isl_die(s->ctx, isl_error_invalid,
2851 "expecting universe parameter domain", goto error);
2852 if (isl_stream_eat(s, '{'))
2853 goto error;
2854
2855 tuple = read_tuple(s, v, 0, 0);
2856 if (!tuple)
2857 goto error;
2858 if (isl_stream_eat_if_available(s, ISL_TOKEN_TO)) {
2859 isl_set *set;
2860 isl_space *space;
2861 int has_expr;
2862
2863 has_expr = tuple_has_expr(tuple);
2864 if (has_expr < 0)
2865 goto error;
2866 if (has_expr)
2867 isl_die(s->ctx, isl_error_invalid,
2868 "expecting universe domain", goto error);
2869 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
2870 set = isl_set_universe(space);
2871 dom = isl_set_intersect_params(set, dom);
2872 isl_multi_pw_aff_free(tuple);
2873 tuple = read_tuple(s, v, 0, 0);
2874 if (!tuple)
2875 goto error;
2876 }
2877
2878 if (isl_stream_eat(s, '}'))
2879 goto error;
2880
2881 n = isl_multi_pw_aff_dim(tuple, isl_dim_out);
2882 dim = isl_set_dim(dom, isl_dim_all);
2883 dom_space = isl_set_get_space(dom);
2884 space = isl_space_range(isl_multi_pw_aff_get_space(tuple));
2885 space = isl_space_align_params(space, isl_space_copy(dom_space));
2886 if (!isl_space_is_params(dom_space))
2887 space = isl_space_map_from_domain_and_range(
2888 isl_space_copy(dom_space), space);
2889 isl_space_free(dom_space);
2890 ma = isl_multi_aff_alloc(space);
2891
2892 for (i = 0; i < n; ++i) {
2893 isl_pw_aff *pa;
2894 isl_aff *aff;
2895 pa = isl_multi_pw_aff_get_pw_aff(tuple, i);
2896 aff = aff_from_pw_aff(pa);
2897 if (!aff)
2898 goto error;
2899 if (isl_aff_involves_dims(aff, isl_dim_in, dim, i + 1)) {
2900 isl_aff_free(aff);
2901 isl_die(s->ctx, isl_error_invalid,
2902 "not an affine expression", goto error);
2903 }
2904 aff = isl_aff_drop_dims(aff, isl_dim_in, dim, n);
2905 space = isl_multi_aff_get_domain_space(ma);
2906 aff = isl_aff_reset_domain_space(aff, space);
2907 ma = isl_multi_aff_set_aff(ma, i, aff);
2908 }
2909
2910 isl_multi_pw_aff_free(tuple);
2911 vars_free(v);
2912 isl_set_free(dom);
2913 return ma;
2914 error:
2915 isl_multi_pw_aff_free(tuple);
2916 vars_free(v);
2917 isl_set_free(dom);
2918 isl_multi_aff_free(ma);
2919 return NULL;
2920 }
2921
2922 __isl_give isl_multi_aff *isl_multi_aff_read_from_str(isl_ctx *ctx,
2923 const char *str)
2924 {
2925 isl_multi_aff *maff;
2926 struct isl_stream *s = isl_stream_new_str(ctx, str);
2927 if (!s)
2928 return NULL;
2929 maff = isl_stream_read_multi_aff(s);
2930 isl_stream_free(s);
2931 return maff;
2932 }
2933
2934 __isl_give isl_union_pw_qpolynomial *isl_stream_read_union_pw_qpolynomial(
2935 struct isl_stream *s)
2936 {
2937 struct isl_obj obj;
2938
2939 obj = obj_read(s);
2940 if (obj.type == isl_obj_pw_qpolynomial) {
2941 obj.type = isl_obj_union_pw_qpolynomial;
2942 obj.v = isl_union_pw_qpolynomial_from_pw_qpolynomial(obj.v);
2943 }
2944 if (obj.v)
2945 isl_assert(s->ctx, obj.type == isl_obj_union_pw_qpolynomial,
2946 goto error);
2947
2948 return obj.v;
2949 error:
2950 obj.type->free(obj.v);
2951 return NULL;
2952 }
2953
2954 __isl_give isl_union_pw_qpolynomial *isl_union_pw_qpolynomial_read_from_str(
2955 isl_ctx *ctx, const char *str)
2956 {
2957 isl_union_pw_qpolynomial *upwqp;
2958 struct isl_stream *s = isl_stream_new_str(ctx, str);
2959 if (!s)
2960 return NULL;
2961 upwqp = isl_stream_read_union_pw_qpolynomial(s);
2962 isl_stream_free(s);
2963 return upwqp;
2964 }
Integer set library