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isl_map_simplify.c: eliminate_divs_ineq: avoid NULL pointer dereference
[isl.git] / isl_input.c
blobb70b09140bd85550c0626837253a065aed5c5cb1
1 /*
2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
4 *
5 * Use of this software is governed by the GNU LGPLv2.1 license
6 *
7 * Written by Sven Verdoolaege, K.U.Leuven, Departement
8 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
9 * and INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
10 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France
11 */
12
13 #include <ctype.h>
14 #include <stdio.h>
15 #include <string.h>
16 #include <strings.h>
17 #include <isl_set.h>
18 #include <isl_seq.h>
19 #include <isl_div.h>
20 #include "isl_stream.h"
21 #include "isl_map_private.h"
22 #include "isl_obj.h"
23 #include "isl_polynomial_private.h"
24
25 struct variable {
26 char *name;
27 int pos;
28 struct variable *next;
29 };
30
31 struct vars {
32 struct isl_ctx *ctx;
33 int n;
34 struct variable *v;
35 };
36
37 static struct vars *vars_new(struct isl_ctx *ctx)
38 {
39 struct vars *v;
40 v = isl_alloc_type(ctx, struct vars);
41 if (!v)
42 return NULL;
43 v->ctx = ctx;
44 v->n = 0;
45 v->v = NULL;
46 return v;
47 }
48
49 static void variable_free(struct variable *var)
50 {
51 while (var) {
52 struct variable *next = var->next;
53 free(var->name);
54 free(var);
55 var = next;
56 }
57 }
58
59 static void vars_free(struct vars *v)
60 {
61 if (!v)
62 return;
63 variable_free(v->v);
64 free(v);
65 }
66
67 static void vars_drop(struct vars *v, int n)
68 {
69 struct variable *var;
70
71 if (!v)
72 return;
73
74 v->n -= n;
75
76 var = v->v;
77 while (--n >= 0) {
78 struct variable *next = var->next;
79 free(var->name);
80 free(var);
81 var = next;
82 }
83 v->v = var;
84 }
85
86 static struct variable *variable_new(struct vars *v, const char *name, int len,
87 int pos)
88 {
89 struct variable *var;
90 var = isl_alloc_type(v->ctx, struct variable);
91 if (!var)
92 goto error;
93 var->name = strdup(name);
94 var->name[len] = '\0';
95 var->pos = pos;
96 var->next = v->v;
97 return var;
98 error:
99 variable_free(v->v);
100 return NULL;
101 }
102
103 static int vars_pos(struct vars *v, const char *s, int len)
104 {
105 int pos;
106 struct variable *q;
107
108 if (len == -1)
109 len = strlen(s);
110 for (q = v->v; q; q = q->next) {
111 if (strncmp(q->name, s, len) == 0 && q->name[len] == '\0')
112 break;
113 }
114 if (q)
115 pos = q->pos;
116 else {
117 pos = v->n;
118 v->v = variable_new(v, s, len, v->n);
119 if (!v->v)
120 return -1;
121 v->n++;
122 }
123 return pos;
124 }
125
126 static __isl_give isl_basic_map *set_name(__isl_take isl_basic_map *bmap,
127 enum isl_dim_type type, unsigned pos, char *name)
128 {
129 char *prime;
130
131 if (!bmap)
132 return NULL;
133 if (!name)
134 return bmap;
135
136 prime = strchr(name, '\'');
137 if (prime)
138 *prime = '\0';
139 bmap->dim = isl_dim_set_name(bmap->dim, type, pos, name);
140 if (prime)
141 *prime = '\'';
142
143 if (!bmap->dim)
144 goto error;
145
146 return bmap;
147 error:
148 isl_basic_map_free(bmap);
149 return NULL;
150 }
151
152 static int accept_cst_factor(struct isl_stream *s, isl_int *f)
153 {
154 struct isl_token *tok;
155
156 tok = isl_stream_next_token(s);
157 if (!tok || tok->type != ISL_TOKEN_VALUE) {
158 isl_stream_error(s, tok, "expecting constant value");
159 goto error;
160 }
161
162 isl_int_mul(*f, *f, tok->u.v);
163
164 isl_token_free(tok);
165
166 if (isl_stream_eat_if_available(s, '*'))
167 return accept_cst_factor(s, f);
168
169 return 0;
170 error:
171 isl_token_free(tok);
172 return -1;
173 }
174
175 static struct isl_vec *accept_affine(struct isl_stream *s, struct vars *v);
176
177 static __isl_give isl_vec *accept_affine_factor(struct isl_stream *s,
178 struct vars *v)
179 {
180 struct isl_token *tok = NULL;
181 isl_vec *aff = NULL;
182
183 tok = isl_stream_next_token(s);
184 if (!tok) {
185 isl_stream_error(s, NULL, "unexpected EOF");
186 goto error;
187 }
188 if (tok->type == ISL_TOKEN_IDENT) {
189 int n = v->n;
190 int pos = vars_pos(v, tok->u.s, -1);
191 if (pos < 0)
192 goto error;
193 if (pos >= n) {
194 isl_stream_error(s, tok, "unknown identifier");
195 goto error;
196 }
197
198 aff = isl_vec_alloc(v->ctx, 1 + v->n);
199 if (!aff)
200 goto error;
201 isl_seq_clr(aff->el, aff->size);
202 isl_int_set_si(aff->el[1 + pos], 1);
203 isl_token_free(tok);
204 } else if (tok->type == ISL_TOKEN_VALUE) {
205 if (isl_stream_eat_if_available(s, '*')) {
206 aff = accept_affine_factor(s, v);
207 aff = isl_vec_scale(aff, tok->u.v);
208 } else {
209 aff = isl_vec_alloc(v->ctx, 1 + v->n);
210 if (!aff)
211 goto error;
212 isl_seq_clr(aff->el, aff->size);
213 isl_int_set(aff->el[0], tok->u.v);
214 }
215 isl_token_free(tok);
216 } else if (tok->type == '(') {
217 isl_token_free(tok);
218 tok = NULL;
219 aff = accept_affine(s, v);
220 if (!aff)
221 goto error;
222 if (isl_stream_eat(s, ')'))
223 goto error;
224 } else {
225 isl_stream_error(s, tok, "expecting factor");
226 goto error;
227 }
228 if (isl_stream_eat_if_available(s, '*')) {
229 isl_int f;
230 isl_int_init(f);
231 isl_int_set_si(f, 1);
232 if (accept_cst_factor(s, &f) < 0) {
233 isl_int_clear(f);
234 goto error;
235 }
236 aff = isl_vec_scale(aff, f);
237 isl_int_clear(f);
238 }
239
240 return aff;
241 error:
242 isl_token_free(tok);
243 isl_vec_free(aff);
244 return NULL;
245 }
246
247 static struct isl_vec *accept_affine(struct isl_stream *s, struct vars *v)
248 {
249 struct isl_token *tok = NULL;
250 struct isl_vec *aff;
251 int sign = 1;
252
253 aff = isl_vec_alloc(v->ctx, 1 + v->n);
254 if (!aff)
255 return NULL;
256 isl_seq_clr(aff->el, aff->size);
257
258 for (;;) {
259 tok = isl_stream_next_token(s);
260 if (!tok) {
261 isl_stream_error(s, NULL, "unexpected EOF");
262 goto error;
263 }
264 if (tok->type == '-') {
265 sign = -sign;
266 isl_token_free(tok);
267 continue;
268 }
269 if (tok->type == '(' || tok->type == ISL_TOKEN_IDENT) {
270 isl_vec *aff2;
271 isl_stream_push_token(s, tok);
272 tok = NULL;
273 aff2 = accept_affine_factor(s, v);
274 if (sign < 0)
275 aff2 = isl_vec_scale(aff2, s->ctx->negone);
276 aff = isl_vec_add(aff, aff2);
277 if (!aff)
278 goto error;
279 sign = 1;
280 } else if (tok->type == ISL_TOKEN_VALUE) {
281 if (sign < 0)
282 isl_int_neg(tok->u.v, tok->u.v);
283 if (isl_stream_eat_if_available(s, '*') ||
284 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
285 isl_vec *aff2;
286 aff2 = accept_affine_factor(s, v);
287 aff2 = isl_vec_scale(aff2, tok->u.v);
288 aff = isl_vec_add(aff, aff2);
289 if (!aff)
290 goto error;
291 } else {
292 isl_int_add(aff->el[0], aff->el[0], tok->u.v);
293 }
294 sign = 1;
295 }
296 isl_token_free(tok);
297
298 tok = isl_stream_next_token(s);
299 if (tok && tok->type == '-') {
300 sign = -sign;
301 isl_token_free(tok);
302 } else if (tok && tok->type == '+') {
303 /* nothing */
304 isl_token_free(tok);
305 } else if (tok && tok->type == ISL_TOKEN_VALUE &&
306 isl_int_is_neg(tok->u.v)) {
307 isl_stream_push_token(s, tok);
308 } else {
309 if (tok)
310 isl_stream_push_token(s, tok);
311 break;
312 }
313 }
314
315 return aff;
316 error:
317 isl_token_free(tok);
318 isl_vec_free(aff);
319 return NULL;
320 }
321
322 static __isl_give isl_basic_map *read_var_list(struct isl_stream *s,
323 __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v)
324 {
325 int i = 0;
326 struct isl_token *tok;
327
328 while ((tok = isl_stream_next_token(s)) != NULL) {
329 int new_name = 0;
330
331 if (tok->type == ISL_TOKEN_IDENT) {
332 int n = v->n;
333 int p = vars_pos(v, tok->u.s, -1);
334 if (p < 0)
335 goto error;
336 new_name = p >= n;
337 }
338
339 if (new_name) {
340 bmap = isl_basic_map_add(bmap, type, 1);
341 bmap = set_name(bmap, type, i, v->v->name);
342 isl_token_free(tok);
343 } else if (tok->type == ISL_TOKEN_IDENT ||
344 tok->type == ISL_TOKEN_VALUE) {
345 struct isl_vec *vec;
346 int k;
347 if (type == isl_dim_param) {
348 isl_stream_error(s, tok,
349 "expecting unique identifier");
350 goto error;
351 }
352 isl_stream_push_token(s, tok);
353 tok = NULL;
354 vec = accept_affine(s, v);
355 if (!vec)
356 goto error;
357 v->v = variable_new(v, "", 0, v->n);
358 if (!v->v)
359 goto error;
360 v->n++;
361 bmap = isl_basic_map_add(bmap, type, 1);
362 bmap = isl_basic_map_extend_constraints(bmap, 1, 0);
363 k = isl_basic_map_alloc_equality(bmap);
364 if (k >= 0) {
365 isl_seq_cpy(bmap->eq[k], vec->el, vec->size);
366 isl_int_set_si(bmap->eq[k][vec->size], -1);
367 }
368 isl_vec_free(vec);
369 if (k < 0)
370 goto error;
371 } else
372 break;
373
374 tok = isl_stream_next_token(s);
375 if (!tok || tok->type != ',')
376 break;
377
378 isl_token_free(tok);
379 i++;
380 }
381 if (tok)
382 isl_stream_push_token(s, tok);
383
384 return bmap;
385 error:
386 isl_token_free(tok);
387 isl_basic_map_free(bmap);
388 return NULL;
389 }
390
391 static __isl_give isl_mat *accept_affine_list(struct isl_stream *s,
392 struct vars *v)
393 {
394 struct isl_vec *vec;
395 struct isl_mat *mat;
396 struct isl_token *tok = NULL;
397
398 vec = accept_affine(s, v);
399 mat = isl_mat_from_row_vec(vec);
400 if (!mat)
401 return NULL;
402
403 for (;;) {
404 tok = isl_stream_next_token(s);
405 if (!tok) {
406 isl_stream_error(s, NULL, "unexpected EOF");
407 goto error;
408 }
409 if (tok->type != ',') {
410 isl_stream_push_token(s, tok);
411 break;
412 }
413 isl_token_free(tok);
414
415 vec = accept_affine(s, v);
416 mat = isl_mat_vec_concat(mat, vec);
417 if (!mat)
418 return NULL;
419 }
420
421 return mat;
422 error:
423 isl_mat_free(mat);
424 return NULL;
425 }
426
427 static struct isl_basic_map *add_div_definition(struct isl_stream *s,
428 struct vars *v, struct isl_basic_map *bmap, int k)
429 {
430 struct isl_token *tok;
431 int seen_paren = 0;
432 struct isl_vec *aff;
433
434 if (isl_stream_eat(s, '['))
435 goto error;
436
437 tok = isl_stream_next_token(s);
438 if (!tok)
439 goto error;
440 if (tok->type == '(') {
441 seen_paren = 1;
442 isl_token_free(tok);
443 } else
444 isl_stream_push_token(s, tok);
445
446 aff = accept_affine(s, v);
447 if (!aff)
448 goto error;
449
450 isl_seq_cpy(bmap->div[k] + 1, aff->el, aff->size);
451
452 isl_vec_free(aff);
453
454 if (seen_paren && isl_stream_eat(s, ')'))
455 goto error;
456 if (isl_stream_eat(s, '/'))
457 goto error;
458
459 tok = isl_stream_next_token(s);
460 if (!tok)
461 goto error;
462 if (tok->type != ISL_TOKEN_VALUE) {
463 isl_stream_error(s, tok, "expected denominator");
464 isl_stream_push_token(s, tok);
465 goto error;
466 }
467 isl_int_set(bmap->div[k][0], tok->u.v);
468 isl_token_free(tok);
469
470 if (isl_stream_eat(s, ']'))
471 goto error;
472
473 if (isl_basic_map_add_div_constraints(bmap, k) < 0)
474 goto error;
475
476 return bmap;
477 error:
478 isl_basic_map_free(bmap);
479 return NULL;
480 }
481
482 static struct isl_basic_map *read_defined_var_list(struct isl_stream *s,
483 struct vars *v, struct isl_basic_map *bmap)
484 {
485 struct isl_token *tok;
486
487 while ((tok = isl_stream_next_token(s)) != NULL) {
488 int k;
489 int p;
490 int n = v->n;
491 unsigned total = isl_basic_map_total_dim(bmap);
492
493 if (tok->type != ISL_TOKEN_IDENT)
494 break;
495
496 p = vars_pos(v, tok->u.s, -1);
497 if (p < 0)
498 goto error;
499 if (p < n) {
500 isl_stream_error(s, tok, "expecting unique identifier");
501 goto error;
502 }
503
504 bmap = isl_basic_map_cow(bmap);
505 bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
506 1, 0, 2);
507
508 if ((k = isl_basic_map_alloc_div(bmap)) < 0)
509 goto error;
510 isl_seq_clr(bmap->div[k], 1 + 1 + total);
511
512 isl_token_free(tok);
513 tok = isl_stream_next_token(s);
514 if (tok && tok->type == '=') {
515 isl_token_free(tok);
516 bmap = add_div_definition(s, v, bmap, k);
517 tok = isl_stream_next_token(s);
518 }
519
520 if (!tok || tok->type != ',')
521 break;
522
523 isl_token_free(tok);
524 }
525 if (tok)
526 isl_stream_push_token(s, tok);
527
528 return bmap;
529 error:
530 isl_token_free(tok);
531 isl_basic_map_free(bmap);
532 return NULL;
533 }
534
535 static __isl_give isl_basic_map *read_tuple(struct isl_stream *s,
536 __isl_take isl_basic_map *bmap, enum isl_dim_type type, struct vars *v)
537 {
538 struct isl_token *tok;
539
540 tok = isl_stream_next_token(s);
541 if (!tok || tok->type != '[') {
542 isl_stream_error(s, tok, "expecting '['");
543 goto error;
544 }
545 isl_token_free(tok);
546 bmap = read_var_list(s, bmap, type, v);
547 tok = isl_stream_next_token(s);
548 if (!tok || tok->type != ']') {
549 isl_stream_error(s, tok, "expecting ']'");
550 goto error;
551 }
552 isl_token_free(tok);
553
554 return bmap;
555 error:
556 if (tok)
557 isl_token_free(tok);
558 isl_basic_map_free(bmap);
559 return NULL;
560 }
561
562 static struct isl_basic_map *add_constraints(struct isl_stream *s,
563 struct vars *v, struct isl_basic_map *bmap);
564
565 static struct isl_basic_map *add_exists(struct isl_stream *s,
566 struct vars *v, struct isl_basic_map *bmap)
567 {
568 struct isl_token *tok;
569 int n = v->n;
570 int extra;
571 int seen_paren = 0;
572 int i;
573 unsigned total;
574
575 tok = isl_stream_next_token(s);
576 if (!tok)
577 goto error;
578 if (tok->type == '(') {
579 seen_paren = 1;
580 isl_token_free(tok);
581 } else
582 isl_stream_push_token(s, tok);
583
584 bmap = read_defined_var_list(s, v, bmap);
585 if (!bmap)
586 goto error;
587
588 if (isl_stream_eat(s, ':'))
589 goto error;
590 bmap = add_constraints(s, v, bmap);
591 if (seen_paren && isl_stream_eat(s, ')'))
592 goto error;
593 return bmap;
594 error:
595 isl_basic_map_free(bmap);
596 return NULL;
597 }
598
599 static __isl_give isl_basic_map *construct_constraint(
600 __isl_take isl_basic_map *bmap, enum isl_token_type type,
601 isl_int *left, isl_int *right)
602 {
603 int k;
604 unsigned len;
605 struct isl_ctx *ctx;
606
607 if (!bmap)
608 return NULL;
609 len = 1 + isl_basic_map_total_dim(bmap);
610 ctx = bmap->ctx;
611
612 k = isl_basic_map_alloc_inequality(bmap);
613 if (k < 0)
614 goto error;
615 if (type == ISL_TOKEN_LE)
616 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
617 ctx->one, right,
618 len);
619 else if (type == ISL_TOKEN_GE)
620 isl_seq_combine(bmap->ineq[k], ctx->one, left,
621 ctx->negone, right,
622 len);
623 else if (type == ISL_TOKEN_LT) {
624 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
625 ctx->one, right,
626 len);
627 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
628 } else if (type == ISL_TOKEN_GT) {
629 isl_seq_combine(bmap->ineq[k], ctx->one, left,
630 ctx->negone, right,
631 len);
632 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
633 } else {
634 isl_seq_combine(bmap->ineq[k], ctx->one, left,
635 ctx->negone, right,
636 len);
637 isl_basic_map_inequality_to_equality(bmap, k);
638 }
639
640 return bmap;
641 error:
642 isl_basic_map_free(bmap);
643 return NULL;
644 }
645
646 static int is_comparator(struct isl_token *tok)
647 {
648 if (!tok)
649 return 0;
650
651 switch (tok->type) {
652 case ISL_TOKEN_LT:
653 case ISL_TOKEN_GT:
654 case ISL_TOKEN_LE:
655 case ISL_TOKEN_GE:
656 case '=':
657 return 1;
658 default:
659 return 0;
660 }
661 }
662
663 static struct isl_basic_map *add_constraint(struct isl_stream *s,
664 struct vars *v, struct isl_basic_map *bmap)
665 {
666 int i, j;
667 unsigned total = isl_basic_map_total_dim(bmap);
668 struct isl_token *tok = NULL;
669 struct isl_mat *aff1 = NULL, *aff2 = NULL;
670
671 tok = isl_stream_next_token(s);
672 if (!tok)
673 goto error;
674 if (tok->type == ISL_TOKEN_EXISTS) {
675 isl_token_free(tok);
676 return add_exists(s, v, bmap);
677 }
678 isl_stream_push_token(s, tok);
679 tok = NULL;
680
681 bmap = isl_basic_map_cow(bmap);
682
683 aff1 = accept_affine_list(s, v);
684 if (!aff1)
685 goto error;
686 tok = isl_stream_next_token(s);
687 if (!is_comparator(tok)) {
688 isl_stream_error(s, tok, "missing operator");
689 if (tok)
690 isl_stream_push_token(s, tok);
691 tok = NULL;
692 goto error;
693 }
694 isl_assert(aff1->ctx, aff1->n_col == 1 + total, goto error);
695 for (;;) {
696 aff2 = accept_affine_list(s, v);
697 if (!aff2)
698 goto error;
699 isl_assert(aff2->ctx, aff2->n_col == 1 + total, goto error);
700
701 bmap = isl_basic_map_extend_constraints(bmap, 0,
702 aff1->n_row * aff2->n_row);
703 for (i = 0; i < aff1->n_row; ++i)
704 for (j = 0; j < aff2->n_row; ++j)
705 bmap = construct_constraint(bmap, tok->type,
706 aff1->row[i], aff2->row[j]);
707 isl_token_free(tok);
708 isl_mat_free(aff1);
709 aff1 = aff2;
710
711 tok = isl_stream_next_token(s);
712 if (!is_comparator(tok)) {
713 if (tok)
714 isl_stream_push_token(s, tok);
715 break;
716 }
717 }
718 isl_mat_free(aff1);
719
720 return bmap;
721 error:
722 if (tok)
723 isl_token_free(tok);
724 isl_mat_free(aff1);
725 isl_mat_free(aff2);
726 isl_basic_map_free(bmap);
727 return NULL;
728 }
729
730 static struct isl_basic_map *add_constraints(struct isl_stream *s,
731 struct vars *v, struct isl_basic_map *bmap)
732 {
733 struct isl_token *tok;
734
735 for (;;) {
736 bmap = add_constraint(s, v, bmap);
737 if (!bmap)
738 return NULL;
739 tok = isl_stream_next_token(s);
740 if (!tok) {
741 isl_stream_error(s, NULL, "unexpected EOF");
742 goto error;
743 }
744 if (tok->type != ISL_TOKEN_AND)
745 break;
746 isl_token_free(tok);
747 }
748 isl_stream_push_token(s, tok);
749
750 return bmap;
751 error:
752 if (tok)
753 isl_token_free(tok);
754 isl_basic_map_free(bmap);
755 return NULL;
756 }
757
758 static struct isl_basic_map *read_disjunct(struct isl_stream *s,
759 struct vars *v, __isl_take isl_dim *dim)
760 {
761 int seen_paren = 0;
762 struct isl_token *tok;
763 struct isl_basic_map *bmap;
764
765 bmap = isl_basic_map_alloc_dim(dim, 0, 0, 0);
766 if (!bmap)
767 return NULL;
768
769 tok = isl_stream_next_token(s);
770 if (!tok)
771 goto error;
772 if (tok->type == '(') {
773 seen_paren = 1;
774 isl_token_free(tok);
775 } else
776 isl_stream_push_token(s, tok);
777
778 bmap = add_constraints(s, v, bmap);
779 bmap = isl_basic_map_simplify(bmap);
780 bmap = isl_basic_map_finalize(bmap);
781
782 if (seen_paren && isl_stream_eat(s, ')'))
783 goto error;
784
785 return bmap;
786 error:
787 isl_basic_map_free(bmap);
788 return NULL;
789 }
790
791 static struct isl_map *read_disjuncts(struct isl_stream *s,
792 struct vars *v, __isl_take isl_dim *dim)
793 {
794 struct isl_token *tok;
795 struct isl_map *map;
796
797 tok = isl_stream_next_token(s);
798 if (!tok) {
799 isl_stream_error(s, NULL, "unexpected EOF");
800 goto error;
801 }
802 if (tok->type == '}') {
803 isl_stream_push_token(s, tok);
804 return isl_map_universe(dim);
805 }
806 isl_stream_push_token(s, tok);
807
808 map = isl_map_empty(isl_dim_copy(dim));
809 for (;;) {
810 struct isl_basic_map *bmap;
811 int n = v->n;
812
813 bmap = read_disjunct(s, v, isl_dim_copy(dim));
814 map = isl_map_union(map, isl_map_from_basic_map(bmap));
815
816 vars_drop(v, v->n - n);
817
818 tok = isl_stream_next_token(s);
819 if (!tok || tok->type != ISL_TOKEN_OR)
820 break;
821 isl_token_free(tok);
822 }
823 if (tok)
824 isl_stream_push_token(s, tok);
825
826 isl_dim_free(dim);
827 return map;
828 error:
829 isl_dim_free(dim);
830 return NULL;
831 }
832
833 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
834 {
835 if (pos < isl_basic_map_dim(bmap, isl_dim_out))
836 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
837 isl_basic_map_dim(bmap, isl_dim_in) + pos;
838 pos -= isl_basic_map_dim(bmap, isl_dim_out);
839
840 if (pos < isl_basic_map_dim(bmap, isl_dim_in))
841 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
842 pos -= isl_basic_map_dim(bmap, isl_dim_in);
843
844 if (pos < isl_basic_map_dim(bmap, isl_dim_div))
845 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
846 isl_basic_map_dim(bmap, isl_dim_in) +
847 isl_basic_map_dim(bmap, isl_dim_out) + pos;
848 pos -= isl_basic_map_dim(bmap, isl_dim_div);
849
850 if (pos < isl_basic_map_dim(bmap, isl_dim_param))
851 return 1 + pos;
852
853 return 0;
854 }
855
856 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
857 struct isl_stream *s, __isl_take isl_basic_map *bmap)
858 {
859 int j;
860 struct isl_token *tok;
861 int type;
862 int k;
863 isl_int *c;
864 unsigned nparam;
865 unsigned dim;
866
867 if (!bmap)
868 return NULL;
869
870 nparam = isl_basic_map_dim(bmap, isl_dim_param);
871 dim = isl_basic_map_dim(bmap, isl_dim_out);
872
873 tok = isl_stream_next_token(s);
874 if (!tok || tok->type != ISL_TOKEN_VALUE) {
875 isl_stream_error(s, tok, "expecting coefficient");
876 if (tok)
877 isl_stream_push_token(s, tok);
878 goto error;
879 }
880 if (!tok->on_new_line) {
881 isl_stream_error(s, tok, "coefficient should appear on new line");
882 isl_stream_push_token(s, tok);
883 goto error;
884 }
885
886 type = isl_int_get_si(tok->u.v);
887 isl_token_free(tok);
888
889 isl_assert(s->ctx, type == 0 || type == 1, goto error);
890 if (type == 0) {
891 k = isl_basic_map_alloc_equality(bmap);
892 c = bmap->eq[k];
893 } else {
894 k = isl_basic_map_alloc_inequality(bmap);
895 c = bmap->ineq[k];
896 }
897 if (k < 0)
898 goto error;
899
900 for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
901 int pos;
902 tok = isl_stream_next_token(s);
903 if (!tok || tok->type != ISL_TOKEN_VALUE) {
904 isl_stream_error(s, tok, "expecting coefficient");
905 if (tok)
906 isl_stream_push_token(s, tok);
907 goto error;
908 }
909 if (tok->on_new_line) {
910 isl_stream_error(s, tok,
911 "coefficient should not appear on new line");
912 isl_stream_push_token(s, tok);
913 goto error;
914 }
915 pos = polylib_pos_to_isl_pos(bmap, j);
916 isl_int_set(c[pos], tok->u.v);
917 isl_token_free(tok);
918 }
919
920 return bmap;
921 error:
922 isl_basic_map_free(bmap);
923 return NULL;
924 }
925
926 static __isl_give isl_basic_map *basic_map_read_polylib(struct isl_stream *s,
927 int nparam)
928 {
929 int i;
930 struct isl_token *tok;
931 struct isl_token *tok2;
932 int n_row, n_col;
933 int on_new_line;
934 unsigned in = 0, out, local = 0;
935 struct isl_basic_map *bmap = NULL;
936
937 if (nparam < 0)
938 nparam = 0;
939
940 tok = isl_stream_next_token(s);
941 if (!tok) {
942 isl_stream_error(s, NULL, "unexpected EOF");
943 return NULL;
944 }
945 tok2 = isl_stream_next_token(s);
946 if (!tok2) {
947 isl_token_free(tok);
948 isl_stream_error(s, NULL, "unexpected EOF");
949 return NULL;
950 }
951 n_row = isl_int_get_si(tok->u.v);
952 n_col = isl_int_get_si(tok2->u.v);
953 on_new_line = tok2->on_new_line;
954 isl_token_free(tok2);
955 isl_token_free(tok);
956 isl_assert(s->ctx, !on_new_line, return NULL);
957 isl_assert(s->ctx, n_row >= 0, return NULL);
958 isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
959 tok = isl_stream_next_token_on_same_line(s);
960 if (tok) {
961 if (tok->type != ISL_TOKEN_VALUE) {
962 isl_stream_error(s, tok,
963 "expecting number of output dimensions");
964 isl_stream_push_token(s, tok);
965 goto error;
966 }
967 out = isl_int_get_si(tok->u.v);
968 isl_token_free(tok);
969
970 tok = isl_stream_next_token_on_same_line(s);
971 if (!tok || tok->type != ISL_TOKEN_VALUE) {
972 isl_stream_error(s, tok,
973 "expecting number of input dimensions");
974 if (tok)
975 isl_stream_push_token(s, tok);
976 goto error;
977 }
978 in = isl_int_get_si(tok->u.v);
979 isl_token_free(tok);
980
981 tok = isl_stream_next_token_on_same_line(s);
982 if (!tok || tok->type != ISL_TOKEN_VALUE) {
983 isl_stream_error(s, tok,
984 "expecting number of existentials");
985 if (tok)
986 isl_stream_push_token(s, tok);
987 goto error;
988 }
989 local = isl_int_get_si(tok->u.v);
990 isl_token_free(tok);
991
992 tok = isl_stream_next_token_on_same_line(s);
993 if (!tok || tok->type != ISL_TOKEN_VALUE) {
994 isl_stream_error(s, tok,
995 "expecting number of parameters");
996 if (tok)
997 isl_stream_push_token(s, tok);
998 goto error;
999 }
1000 nparam = isl_int_get_si(tok->u.v);
1001 isl_token_free(tok);
1002 if (n_col != 1 + out + in + local + nparam + 1) {
1003 isl_stream_error(s, NULL,
1004 "dimensions don't match");
1005 goto error;
1006 }
1007 } else
1008 out = n_col - 2 - nparam;
1009 bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
1010 if (!bmap)
1011 return NULL;
1012
1013 for (i = 0; i < local; ++i) {
1014 int k = isl_basic_map_alloc_div(bmap);
1015 if (k < 0)
1016 goto error;
1017 }
1018
1019 for (i = 0; i < n_row; ++i)
1020 bmap = basic_map_read_polylib_constraint(s, bmap);
1021
1022 tok = isl_stream_next_token_on_same_line(s);
1023 if (tok) {
1024 isl_stream_error(s, tok, "unexpected extra token on line");
1025 isl_stream_push_token(s, tok);
1026 goto error;
1027 }
1028
1029 bmap = isl_basic_map_simplify(bmap);
1030 bmap = isl_basic_map_finalize(bmap);
1031 return bmap;
1032 error:
1033 isl_basic_map_free(bmap);
1034 return NULL;
1035 }
1036
1037 static struct isl_map *map_read_polylib(struct isl_stream *s, int nparam)
1038 {
1039 struct isl_token *tok;
1040 struct isl_token *tok2;
1041 int i, n;
1042 struct isl_map *map;
1043
1044 tok = isl_stream_next_token(s);
1045 if (!tok) {
1046 isl_stream_error(s, NULL, "unexpected EOF");
1047 return NULL;
1048 }
1049 tok2 = isl_stream_next_token_on_same_line(s);
1050 if (tok2) {
1051 isl_stream_push_token(s, tok2);
1052 isl_stream_push_token(s, tok);
1053 return isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
1054 }
1055 n = isl_int_get_si(tok->u.v);
1056 isl_token_free(tok);
1057
1058 isl_assert(s->ctx, n >= 1, return NULL);
1059
1060 map = isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
1061
1062 for (i = 1; i < n; ++i)
1063 map = isl_map_union(map,
1064 isl_map_from_basic_map(basic_map_read_polylib(s, nparam)));
1065
1066 return map;
1067 }
1068
1069 static int optional_power(struct isl_stream *s)
1070 {
1071 int pow;
1072 struct isl_token *tok;
1073
1074 tok = isl_stream_next_token(s);
1075 if (!tok)
1076 return 1;
1077 if (tok->type != '^') {
1078 isl_stream_push_token(s, tok);
1079 return 1;
1080 }
1081 isl_token_free(tok);
1082 tok = isl_stream_next_token(s);
1083 if (!tok || tok->type != ISL_TOKEN_VALUE) {
1084 isl_stream_error(s, tok, "expecting exponent");
1085 if (tok)
1086 isl_stream_push_token(s, tok);
1087 return 1;
1088 }
1089 pow = isl_int_get_si(tok->u.v);
1090 isl_token_free(tok);
1091 return pow;
1092 }
1093
1094 static __isl_give isl_div *read_div(struct isl_stream *s,
1095 __isl_keep isl_basic_map *bmap, struct vars *v)
1096 {
1097 unsigned total = isl_basic_map_total_dim(bmap);
1098 int k;
1099
1100 bmap = isl_basic_map_copy(bmap);
1101 bmap = isl_basic_map_cow(bmap);
1102 bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
1103 1, 0, 2);
1104
1105 if ((k = isl_basic_map_alloc_div(bmap)) < 0)
1106 goto error;
1107 isl_seq_clr(bmap->div[k], 1 + 1 + total);
1108 bmap = add_div_definition(s, v, bmap, k);
1109
1110 return isl_basic_map_div(bmap, k);
1111 error:
1112 isl_basic_map_free(bmap);
1113 return NULL;
1114 }
1115
1116 static __isl_give isl_qpolynomial *read_term(struct isl_stream *s,
1117 __isl_keep isl_basic_map *bmap, struct vars *v);
1118
1119 static __isl_give isl_qpolynomial *read_factor(struct isl_stream *s,
1120 __isl_keep isl_basic_map *bmap, struct vars *v)
1121 {
1122 struct isl_qpolynomial *qp;
1123 struct isl_token *tok;
1124
1125 tok = isl_stream_next_token(s);
1126 if (!tok) {
1127 isl_stream_error(s, NULL, "unexpected EOF");
1128 return NULL;
1129 }
1130 if (tok->type == '(') {
1131 isl_token_free(tok);
1132 qp = read_term(s, bmap, v);
1133 if (!qp)
1134 return NULL;
1135 if (isl_stream_eat(s, ')'))
1136 goto error;
1137 } else if (tok->type == ISL_TOKEN_VALUE) {
1138 struct isl_token *tok2;
1139 tok2 = isl_stream_next_token(s);
1140 if (tok2 && tok2->type == '/') {
1141 isl_token_free(tok2);
1142 tok2 = isl_stream_next_token(s);
1143 if (!tok2 || tok2->type != ISL_TOKEN_VALUE) {
1144 isl_stream_error(s, tok2, "expected denominator");
1145 isl_token_free(tok);
1146 isl_token_free(tok2);
1147 return NULL;
1148 }
1149 qp = isl_qpolynomial_rat_cst(isl_basic_map_get_dim(bmap),
1150 tok->u.v, tok2->u.v);
1151 isl_token_free(tok2);
1152 } else {
1153 isl_stream_push_token(s, tok2);
1154 qp = isl_qpolynomial_cst(isl_basic_map_get_dim(bmap),
1155 tok->u.v);
1156 }
1157 isl_token_free(tok);
1158 } else if (tok->type == ISL_TOKEN_INFTY) {
1159 isl_token_free(tok);
1160 qp = isl_qpolynomial_infty(isl_basic_map_get_dim(bmap));
1161 } else if (tok->type == ISL_TOKEN_NAN) {
1162 isl_token_free(tok);
1163 qp = isl_qpolynomial_nan(isl_basic_map_get_dim(bmap));
1164 } else if (tok->type == ISL_TOKEN_IDENT) {
1165 int n = v->n;
1166 int pos = vars_pos(v, tok->u.s, -1);
1167 int pow;
1168 isl_token_free(tok);
1169 if (pos < 0)
1170 goto error;
1171 if (pos >= n) {
1172 isl_stream_error(s, tok, "unknown identifier");
1173 return NULL;
1174 }
1175 pow = optional_power(s);
1176 qp = isl_qpolynomial_pow(isl_basic_map_get_dim(bmap), pos, pow);
1177 } else if (tok->type == '[') {
1178 isl_div *div;
1179 int pow;
1180
1181 isl_stream_push_token(s, tok);
1182 div = read_div(s, bmap, v);
1183 pow = optional_power(s);
1184 qp = isl_qpolynomial_div_pow(div, pow);
1185 } else if (tok->type == '-') {
1186 struct isl_qpolynomial *qp2;
1187
1188 isl_token_free(tok);
1189 qp = isl_qpolynomial_cst(isl_basic_map_get_dim(bmap),
1190 s->ctx->negone);
1191 qp2 = read_factor(s, bmap, v);
1192 qp = isl_qpolynomial_mul(qp, qp2);
1193 } else {
1194 isl_stream_error(s, tok, "unexpected isl_token");
1195 isl_stream_push_token(s, tok);
1196 return NULL;
1197 }
1198
1199 if (isl_stream_eat_if_available(s, '*') ||
1200 isl_stream_next_token_is(s, ISL_TOKEN_IDENT)) {
1201 struct isl_qpolynomial *qp2;
1202
1203 qp2 = read_factor(s, bmap, v);
1204 qp = isl_qpolynomial_mul(qp, qp2);
1205 }
1206
1207 return qp;
1208 error:
1209 isl_qpolynomial_free(qp);
1210 return NULL;
1211 }
1212
1213 static __isl_give isl_qpolynomial *read_term(struct isl_stream *s,
1214 __isl_keep isl_basic_map *bmap, struct vars *v)
1215 {
1216 struct isl_token *tok;
1217 struct isl_qpolynomial *qp;
1218
1219 qp = read_factor(s, bmap, v);
1220
1221 for (;;) {
1222 tok = isl_stream_next_token(s);
1223 if (!tok)
1224 return qp;
1225
1226 if (tok->type == '+') {
1227 struct isl_qpolynomial *qp2;
1228
1229 isl_token_free(tok);
1230 qp2 = read_factor(s, bmap, v);
1231 qp = isl_qpolynomial_add(qp, qp2);
1232 } else if (tok->type == '-') {
1233 struct isl_qpolynomial *qp2;
1234
1235 isl_token_free(tok);
1236 qp2 = read_factor(s, bmap, v);
1237 qp = isl_qpolynomial_sub(qp, qp2);
1238 } else if (tok->type == ISL_TOKEN_VALUE &&
1239 isl_int_is_neg(tok->u.v)) {
1240 struct isl_qpolynomial *qp2;
1241
1242 qp2 = isl_qpolynomial_cst(isl_basic_map_get_dim(bmap),
1243 tok->u.v);
1244 isl_token_free(tok);
1245 qp = isl_qpolynomial_add(qp, qp2);
1246 } else {
1247 isl_stream_push_token(s, tok);
1248 break;
1249 }
1250 }
1251
1252 return qp;
1253 }
1254
1255 static __isl_give isl_map *read_optional_disjuncts(struct isl_stream *s,
1256 __isl_take isl_basic_map *bmap, struct vars *v)
1257 {
1258 struct isl_token *tok;
1259 struct isl_map *map;
1260
1261 tok = isl_stream_next_token(s);
1262 if (!tok) {
1263 isl_stream_error(s, NULL, "unexpected EOF");
1264 goto error;
1265 }
1266 map = isl_map_from_basic_map(isl_basic_map_copy(bmap));
1267 if (tok->type == ':') {
1268 isl_token_free(tok);
1269 map = isl_map_intersect(map,
1270 read_disjuncts(s, v, isl_basic_map_get_dim(bmap)));
1271 } else
1272 isl_stream_push_token(s, tok);
1273
1274 isl_basic_map_free(bmap);
1275
1276 return map;
1277 error:
1278 isl_basic_map_free(bmap);
1279 return NULL;
1280 }
1281
1282 static struct isl_obj obj_read_poly(struct isl_stream *s,
1283 __isl_take isl_basic_map *bmap, struct vars *v, int n)
1284 {
1285 struct isl_obj obj = { isl_obj_pw_qpolynomial, NULL };
1286 struct isl_pw_qpolynomial *pwqp;
1287 struct isl_qpolynomial *qp;
1288 struct isl_map *map;
1289 struct isl_set *set;
1290
1291 bmap = isl_basic_map_reverse(bmap);
1292
1293 qp = read_term(s, bmap, v);
1294 map = read_optional_disjuncts(s, bmap, v);
1295 set = isl_set_from_map(map);
1296
1297 pwqp = isl_pw_qpolynomial_alloc(set, qp);
1298
1299 vars_drop(v, v->n - n);
1300
1301 obj.v = pwqp;
1302 return obj;
1303 }
1304
1305 static struct isl_obj obj_read_body(struct isl_stream *s,
1306 __isl_take isl_basic_map *bmap, struct vars *v, isl_obj_type type)
1307 {
1308 struct isl_map *map = NULL;
1309 struct isl_token *tok;
1310 struct isl_obj obj = { type, NULL };
1311 int n = v->n;
1312
1313 if (!isl_stream_next_token_is(s, '['))
1314 return obj_read_poly(s, bmap, v, n);
1315
1316 bmap = read_tuple(s, bmap, isl_dim_in, v);
1317 if (!bmap)
1318 goto error;
1319 tok = isl_stream_next_token(s);
1320 if (tok && tok->type == ISL_TOKEN_TO) {
1321 obj.type = isl_obj_map;
1322 isl_token_free(tok);
1323 tok = isl_stream_next_token(s);
1324 if (tok && tok->type != '[') {
1325 isl_stream_push_token(s, tok);
1326 return obj_read_poly(s, bmap, v, n);
1327 }
1328 isl_stream_push_token(s, tok);
1329 bmap = read_tuple(s, bmap, isl_dim_out, v);
1330 if (!bmap)
1331 goto error;
1332 } else {
1333 bmap = isl_basic_map_reverse(bmap);
1334 if (tok)
1335 isl_stream_push_token(s, tok);
1336 }
1337
1338 map = read_optional_disjuncts(s, bmap, v);
1339
1340 vars_drop(v, v->n - n);
1341
1342 obj.v = map;
1343 return obj;
1344 error:
1345 isl_basic_map_free(bmap);
1346 obj.type = isl_obj_none;
1347 return obj;
1348 }
1349
1350 static struct isl_obj obj_add(struct isl_ctx *ctx,
1351 struct isl_obj obj1, struct isl_obj obj2)
1352 {
1353 isl_assert(ctx, obj1.type == obj2.type, goto error);
1354 obj1.v = obj1.type->add(obj1.v, obj2.v);
1355 return obj1;
1356 error:
1357 obj1.type->free(obj1.v);
1358 obj2.type->free(obj2.v);
1359 obj1.type = isl_obj_none;
1360 obj1.v = NULL;
1361 return obj1;
1362 }
1363
1364 static struct isl_obj obj_read(struct isl_stream *s, int nparam)
1365 {
1366 struct isl_basic_map *bmap = NULL;
1367 struct isl_token *tok;
1368 struct vars *v = NULL;
1369 struct isl_obj obj = { isl_obj_set, NULL };
1370
1371 tok = isl_stream_next_token(s);
1372 if (!tok) {
1373 isl_stream_error(s, NULL, "unexpected EOF");
1374 goto error;
1375 }
1376 if (tok->type == ISL_TOKEN_VALUE) {
1377 struct isl_map *map;
1378 isl_stream_push_token(s, tok);
1379 map = map_read_polylib(s, nparam);
1380 if (!map)
1381 goto error;
1382 if (isl_map_dim(map, isl_dim_in) > 0)
1383 obj.type = isl_obj_map;
1384 obj.v = map;
1385 return obj;
1386 }
1387 v = vars_new(s->ctx);
1388 bmap = isl_basic_map_alloc(s->ctx, 0, 0, 0, 0, 0, 0);
1389 if (tok->type == '[') {
1390 isl_stream_push_token(s, tok);
1391 bmap = read_tuple(s, bmap, isl_dim_param, v);
1392 if (!bmap)
1393 goto error;
1394 if (nparam >= 0)
1395 isl_assert(s->ctx, nparam == v->n, goto error);
1396 tok = isl_stream_next_token(s);
1397 if (!tok || tok->type != ISL_TOKEN_TO) {
1398 isl_stream_error(s, tok, "expecting '->'");
1399 if (tok)
1400 isl_stream_push_token(s, tok);
1401 goto error;
1402 }
1403 isl_token_free(tok);
1404 tok = isl_stream_next_token(s);
1405 } else if (nparam > 0)
1406 bmap = isl_basic_map_add(bmap, isl_dim_param, nparam);
1407 if (!tok || tok->type != '{') {
1408 isl_stream_error(s, tok, "expecting '{'");
1409 if (tok)
1410 isl_stream_push_token(s, tok);
1411 goto error;
1412 }
1413 isl_token_free(tok);
1414
1415 tok = isl_stream_next_token(s);
1416 if (!tok)
1417 ;
1418 else if (tok->type == ISL_TOKEN_IDENT && !strcmp(tok->u.s, "Sym")) {
1419 isl_token_free(tok);
1420 if (isl_stream_eat(s, '='))
1421 goto error;
1422 bmap = read_tuple(s, bmap, isl_dim_param, v);
1423 if (!bmap)
1424 goto error;
1425 if (nparam >= 0)
1426 isl_assert(s->ctx, nparam == v->n, goto error);
1427 } else
1428 isl_stream_push_token(s, tok);
1429
1430 for (;;) {
1431 struct isl_obj o;
1432 tok = NULL;
1433 o = obj_read_body(s, isl_basic_map_copy(bmap), v, obj.type);
1434 if (o.type == isl_obj_none)
1435 break;
1436 if (!obj.v)
1437 obj = o;
1438 else {
1439 obj = obj_add(s->ctx, obj, o);
1440 if (obj.type == isl_obj_none)
1441 break;
1442 }
1443 tok = isl_stream_next_token(s);
1444 if (!tok || tok->type != ';')
1445 break;
1446 isl_token_free(tok);
1447 }
1448
1449 if (tok && tok->type == '}') {
1450 isl_token_free(tok);
1451 } else {
1452 isl_stream_error(s, tok, "unexpected isl_token");
1453 if (tok)
1454 isl_token_free(tok);
1455 goto error;
1456 }
1457 vars_free(v);
1458 isl_basic_map_free(bmap);
1459
1460 return obj;
1461 error:
1462 isl_basic_map_free(bmap);
1463 obj.type->free(obj.v);
1464 if (v)
1465 vars_free(v);
1466 obj.v = NULL;
1467 return obj;
1468 }
1469
1470 struct isl_obj isl_stream_read_obj(struct isl_stream *s)
1471 {
1472 return obj_read(s, -1);
1473 }
1474
1475 __isl_give isl_map *isl_stream_read_map(struct isl_stream *s, int nparam)
1476 {
1477 struct isl_obj obj;
1478 struct isl_map *map;
1479
1480 obj = obj_read(s, nparam);
1481 if (obj.v)
1482 isl_assert(s->ctx, obj.type == isl_obj_map ||
1483 obj.type == isl_obj_set, goto error);
1484
1485 return obj.v;
1486 error:
1487 obj.type->free(obj.v);
1488 return NULL;
1489 }
1490
1491 __isl_give isl_set *isl_stream_read_set(struct isl_stream *s, int nparam)
1492 {
1493 struct isl_obj obj;
1494 struct isl_set *set;
1495
1496 obj = obj_read(s, nparam);
1497 if (obj.v)
1498 isl_assert(s->ctx, obj.type == isl_obj_set, goto error);
1499
1500 return obj.v;
1501 error:
1502 obj.type->free(obj.v);
1503 return NULL;
1504 }
1505
1506 static struct isl_basic_map *basic_map_read(struct isl_stream *s, int nparam)
1507 {
1508 struct isl_obj obj;
1509 struct isl_map *map;
1510 struct isl_basic_map *bmap;
1511
1512 obj = obj_read(s, nparam);
1513 map = obj.v;
1514 if (!map)
1515 return NULL;
1516
1517 isl_assert(map->ctx, map->n <= 1, goto error);
1518
1519 if (map->n == 0)
1520 bmap = isl_basic_map_empty_like_map(map);
1521 else
1522 bmap = isl_basic_map_copy(map->p[0]);
1523
1524 isl_map_free(map);
1525
1526 return bmap;
1527 error:
1528 isl_map_free(map);
1529 return NULL;
1530 }
1531
1532 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
1533 FILE *input, int nparam)
1534 {
1535 struct isl_basic_map *bmap;
1536 struct isl_stream *s = isl_stream_new_file(ctx, input);
1537 if (!s)
1538 return NULL;
1539 bmap = basic_map_read(s, nparam);
1540 isl_stream_free(s);
1541 return bmap;
1542 }
1543
1544 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
1545 FILE *input, int nparam)
1546 {
1547 struct isl_basic_map *bmap;
1548 bmap = isl_basic_map_read_from_file(ctx, input, nparam);
1549 if (!bmap)
1550 return NULL;
1551 isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
1552 return (struct isl_basic_set *)bmap;
1553 error:
1554 isl_basic_map_free(bmap);
1555 return NULL;
1556 }
1557
1558 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
1559 const char *str, int nparam)
1560 {
1561 struct isl_basic_map *bmap;
1562 struct isl_stream *s = isl_stream_new_str(ctx, str);
1563 if (!s)
1564 return NULL;
1565 bmap = basic_map_read(s, nparam);
1566 isl_stream_free(s);
1567 return bmap;
1568 }
1569
1570 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
1571 const char *str, int nparam)
1572 {
1573 struct isl_basic_map *bmap;
1574 bmap = isl_basic_map_read_from_str(ctx, str, nparam);
1575 if (!bmap)
1576 return NULL;
1577 isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
1578 return (struct isl_basic_set *)bmap;
1579 error:
1580 isl_basic_map_free(bmap);
1581 return NULL;
1582 }
1583
1584 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
1585 FILE *input, int nparam)
1586 {
1587 struct isl_map *map;
1588 struct isl_stream *s = isl_stream_new_file(ctx, input);
1589 if (!s)
1590 return NULL;
1591 map = isl_stream_read_map(s, nparam);
1592 isl_stream_free(s);
1593 return map;
1594 }
1595
1596 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
1597 const char *str, int nparam)
1598 {
1599 struct isl_map *map;
1600 struct isl_stream *s = isl_stream_new_str(ctx, str);
1601 if (!s)
1602 return NULL;
1603 map = isl_stream_read_map(s, nparam);
1604 isl_stream_free(s);
1605 return map;
1606 }
1607
1608 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
1609 FILE *input, int nparam)
1610 {
1611 struct isl_map *map;
1612 map = isl_map_read_from_file(ctx, input, nparam);
1613 if (!map)
1614 return NULL;
1615 isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
1616 return (struct isl_set *)map;
1617 error:
1618 isl_map_free(map);
1619 return NULL;
1620 }
1621
1622 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
1623 const char *str, int nparam)
1624 {
1625 struct isl_map *map;
1626 map = isl_map_read_from_str(ctx, str, nparam);
1627 if (!map)
1628 return NULL;
1629 isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
1630 return (struct isl_set *)map;
1631 error:
1632 isl_map_free(map);
1633 return NULL;
1634 }
1635
1636 static char *next_line(FILE *input, char *line, unsigned len)
1637 {
1638 char *p;
1639
1640 do {
1641 if (!(p = fgets(line, len, input)))
1642 return NULL;
1643 while (isspace(*p) && *p != '\n')
1644 ++p;
1645 } while (*p == '#' || *p == '\n');
1646
1647 return p;
1648 }
1649
1650 static struct isl_vec *isl_vec_read_from_file_polylib(struct isl_ctx *ctx,
1651 FILE *input)
1652 {
1653 struct isl_vec *vec = NULL;
1654 char line[1024];
1655 char val[1024];
1656 char *p;
1657 unsigned size;
1658 int j;
1659 int n;
1660 int offset;
1661
1662 isl_assert(ctx, next_line(input, line, sizeof(line)), return NULL);
1663 isl_assert(ctx, sscanf(line, "%u", &size) == 1, return NULL);
1664
1665 vec = isl_vec_alloc(ctx, size);
1666
1667 p = next_line(input, line, sizeof(line));
1668 isl_assert(ctx, p, goto error);
1669
1670 for (j = 0; j < size; ++j) {
1671 n = sscanf(p, "%s%n", val, &offset);
1672 isl_assert(ctx, n != 0, goto error);
1673 isl_int_read(vec->el[j], val);
1674 p += offset;
1675 }
1676
1677 return vec;
1678 error:
1679 isl_vec_free(vec);
1680 return NULL;
1681 }
1682
1683 struct isl_vec *isl_vec_read_from_file(struct isl_ctx *ctx,
1684 FILE *input, unsigned input_format)
1685 {
1686 if (input_format == ISL_FORMAT_POLYLIB)
1687 return isl_vec_read_from_file_polylib(ctx, input);
1688 else
1689 isl_assert(ctx, 0, return NULL);
1690 }
1691
1692 __isl_give isl_pw_qpolynomial *isl_stream_read_pw_qpolynomial(
1693 struct isl_stream *s)
1694 {
1695 struct isl_obj obj;
1696 struct isl_pw_qpolynomial *pwqp;
1697
1698 obj = obj_read(s, -1);
1699 if (obj.v)
1700 isl_assert(s->ctx, obj.type == isl_obj_pw_qpolynomial,
1701 goto error);
1702
1703 return obj.v;
1704 error:
1705 obj.type->free(obj.v);
1706 return NULL;
1707 }
Integer set library