2 * Copyright 2008-2009 Katholieke Universiteit Leuven
3 * Copyright 2010 INRIA Saclay
5 * Use of this software is governed by the GNU LGPLv2.1 license
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
19 #include "isl_stream.h"
20 #include "isl_map_private.h"
25 struct variable
*next
;
34 static struct vars
*vars_new(struct isl_ctx
*ctx
)
37 v
= isl_alloc_type(ctx
, struct vars
);
46 static void variable_free(struct variable
*var
)
49 struct variable
*next
= var
->next
;
56 static void vars_free(struct vars
*v
)
64 static struct variable
*variable_new(struct vars
*v
, const char *name
, int len
,
68 var
= isl_alloc_type(v
->ctx
, struct variable
);
71 var
->name
= strdup(name
);
72 var
->name
[len
] = '\0';
81 static int vars_pos(struct vars
*v
, const char *s
, int len
)
88 for (q
= v
->v
; q
; q
= q
->next
) {
89 if (strncmp(q
->name
, s
, len
) == 0 && q
->name
[len
] == '\0')
96 v
->v
= variable_new(v
, s
, len
, v
->n
);
104 static struct vars
*read_var_list(struct isl_stream
*s
, struct vars
*v
)
106 struct isl_token
*tok
;
108 while ((tok
= isl_stream_next_token(s
)) != NULL
) {
112 if (tok
->type
!= ISL_TOKEN_IDENT
)
115 p
= vars_pos(v
, tok
->u
.s
, -1);
119 isl_stream_error(s
, tok
, "expecting unique identifier");
123 tok
= isl_stream_next_token(s
);
124 if (!tok
|| tok
->type
!= ',')
130 isl_stream_push_token(s
, tok
);
139 static struct isl_vec
*accept_affine(struct isl_stream
*s
, struct vars
*v
)
141 struct isl_token
*tok
= NULL
;
145 aff
= isl_vec_alloc(v
->ctx
, 1 + v
->n
);
146 isl_seq_clr(aff
->el
, aff
->size
);
151 tok
= isl_stream_next_token(s
);
153 isl_stream_error(s
, NULL
, "unexpected EOF");
156 if (tok
->type
== ISL_TOKEN_IDENT
) {
158 int pos
= vars_pos(v
, tok
->u
.s
, -1);
162 isl_stream_error(s
, tok
, "unknown identifier");
166 isl_int_add_ui(aff
->el
[1 + pos
],
167 aff
->el
[1 + pos
], 1);
169 isl_int_sub_ui(aff
->el
[1 + pos
],
170 aff
->el
[1 + pos
], 1);
172 } else if (tok
->type
== ISL_TOKEN_VALUE
) {
173 struct isl_token
*tok2
;
176 tok2
= isl_stream_next_token(s
);
177 if (tok2
&& tok2
->type
== ISL_TOKEN_IDENT
) {
178 pos
= vars_pos(v
, tok2
->u
.s
, -1);
182 isl_stream_error(s
, tok2
,
183 "unknown identifier");
184 isl_token_free(tok2
);
187 isl_token_free(tok2
);
189 isl_stream_push_token(s
, tok2
);
191 isl_int_neg(tok
->u
.v
, tok
->u
.v
);
192 isl_int_add(aff
->el
[1 + pos
],
193 aff
->el
[1 + pos
], tok
->u
.v
);
195 } else if (tok
->type
== '-') {
197 } else if (tok
->type
== '+') {
200 isl_stream_push_token(s
, tok
);
212 static struct isl_basic_map
*add_div_definition(struct isl_stream
*s
,
213 struct vars
*v
, struct isl_basic_map
*bmap
, int k
)
215 struct isl_token
*tok
;
219 if (isl_stream_eat(s
, '['))
222 tok
= isl_stream_next_token(s
);
225 if (tok
->type
== '(') {
229 isl_stream_push_token(s
, tok
);
231 aff
= accept_affine(s
, v
);
235 isl_seq_cpy(bmap
->div
[k
] + 1, aff
->el
, aff
->size
);
239 if (seen_paren
&& isl_stream_eat(s
, ')'))
241 if (isl_stream_eat(s
, '/'))
244 tok
= isl_stream_next_token(s
);
247 if (tok
->type
!= ISL_TOKEN_VALUE
) {
248 isl_stream_error(s
, tok
, "expected denominator");
249 isl_stream_push_token(s
, tok
);
252 isl_int_set(bmap
->div
[k
][0], tok
->u
.v
);
255 if (isl_stream_eat(s
, ']'))
258 if (isl_basic_map_add_div_constraints(bmap
, k
) < 0)
263 isl_basic_map_free(bmap
);
267 static struct isl_basic_map
*read_defined_var_list(struct isl_stream
*s
,
268 struct vars
*v
, struct isl_basic_map
*bmap
)
270 struct isl_token
*tok
;
272 while ((tok
= isl_stream_next_token(s
)) != NULL
) {
276 unsigned total
= isl_basic_map_total_dim(bmap
);
278 if (tok
->type
!= ISL_TOKEN_IDENT
)
281 p
= vars_pos(v
, tok
->u
.s
, -1);
285 isl_stream_error(s
, tok
, "expecting unique identifier");
290 bmap
= isl_basic_map_cow(bmap
);
291 bmap
= isl_basic_map_extend_dim(bmap
, isl_dim_copy(bmap
->dim
),
294 if ((k
= isl_basic_map_alloc_div(bmap
)) < 0)
296 isl_seq_clr(bmap
->div
[k
], 1 + 1 + total
);
298 tok
= isl_stream_next_token(s
);
299 if (tok
&& tok
->type
== '=') {
301 bmap
= add_div_definition(s
, v
, bmap
, k
);
302 tok
= isl_stream_next_token(s
);
305 if (!tok
|| tok
->type
!= ',')
311 isl_stream_push_token(s
, tok
);
316 isl_basic_map_free(bmap
);
320 static struct vars
*read_tuple(struct isl_stream
*s
, struct vars
*v
)
322 struct isl_token
*tok
;
324 tok
= isl_stream_next_token(s
);
325 if (!tok
|| tok
->type
!= '[') {
326 isl_stream_error(s
, tok
, "expecting '['");
330 v
= read_var_list(s
, v
);
331 tok
= isl_stream_next_token(s
);
332 if (!tok
|| tok
->type
!= ']') {
333 isl_stream_error(s
, tok
, "expecting ']'");
346 static struct isl_basic_map
*add_constraints(struct isl_stream
*s
,
347 struct vars
**v
, struct isl_basic_map
*bmap
);
349 static struct isl_basic_map
*add_exists(struct isl_stream
*s
,
350 struct vars
**v
, struct isl_basic_map
*bmap
)
352 struct isl_token
*tok
;
359 tok
= isl_stream_next_token(s
);
362 if (tok
->type
== '(') {
366 isl_stream_push_token(s
, tok
);
368 bmap
= read_defined_var_list(s
, *v
, bmap
);
372 if (isl_stream_eat(s
, ':'))
374 bmap
= add_constraints(s
, v
, bmap
);
375 if (seen_paren
&& isl_stream_eat(s
, ')'))
379 isl_basic_map_free(bmap
);
383 static struct isl_basic_map
*add_constraint(struct isl_stream
*s
,
384 struct vars
**v
, struct isl_basic_map
*bmap
)
386 unsigned total
= isl_basic_map_total_dim(bmap
);
388 struct isl_token
*tok
= NULL
;
389 struct isl_vec
*aff1
= NULL
, *aff2
= NULL
;
391 tok
= isl_stream_next_token(s
);
394 if (tok
->type
== ISL_TOKEN_EXISTS
) {
396 return add_exists(s
, v
, bmap
);
398 isl_stream_push_token(s
, tok
);
401 bmap
= isl_basic_map_cow(bmap
);
402 bmap
= isl_basic_map_extend_constraints(bmap
, 0, 1);
403 k
= isl_basic_map_alloc_inequality(bmap
);
407 aff1
= accept_affine(s
, *v
);
410 tok
= isl_stream_next_token(s
);
419 isl_stream_error(s
, tok
, "missing operator");
420 isl_stream_push_token(s
, tok
);
424 aff2
= accept_affine(s
, *v
);
427 isl_assert(aff1
->ctx
, aff1
->size
== 1 + total
, goto error
);
428 isl_assert(aff2
->ctx
, aff2
->size
== 1 + total
, goto error
);
430 if (tok
->type
== ISL_TOKEN_LE
)
431 isl_seq_combine(bmap
->ineq
[k
], (*v
)->ctx
->negone
, aff1
->el
,
432 (*v
)->ctx
->one
, aff2
->el
,
434 else if (tok
->type
== ISL_TOKEN_GE
)
435 isl_seq_combine(bmap
->ineq
[k
], (*v
)->ctx
->one
, aff1
->el
,
436 (*v
)->ctx
->negone
, aff2
->el
,
438 else if (tok
->type
== ISL_TOKEN_LT
) {
439 isl_seq_combine(bmap
->ineq
[k
], (*v
)->ctx
->negone
, aff1
->el
,
440 (*v
)->ctx
->one
, aff2
->el
,
442 isl_int_sub_ui(bmap
->ineq
[k
][0], bmap
->ineq
[k
][0], 1);
443 } else if (tok
->type
== ISL_TOKEN_GT
) {
444 isl_seq_combine(bmap
->ineq
[k
], (*v
)->ctx
->one
, aff1
->el
,
445 (*v
)->ctx
->negone
, aff2
->el
,
447 isl_int_sub_ui(bmap
->ineq
[k
][0], bmap
->ineq
[k
][0], 1);
449 isl_seq_combine(bmap
->ineq
[k
], (*v
)->ctx
->one
, aff1
->el
,
450 (*v
)->ctx
->negone
, aff2
->el
,
452 isl_basic_map_inequality_to_equality(bmap
, k
);
464 isl_basic_map_free(bmap
);
468 static struct isl_basic_map
*add_constraints(struct isl_stream
*s
,
469 struct vars
**v
, struct isl_basic_map
*bmap
)
471 struct isl_token
*tok
;
474 bmap
= add_constraint(s
, v
, bmap
);
477 tok
= isl_stream_next_token(s
);
479 isl_stream_error(s
, NULL
, "unexpected EOF");
482 if (tok
->type
!= ISL_TOKEN_AND
)
486 isl_stream_push_token(s
, tok
);
492 isl_basic_map_free(bmap
);
496 static struct isl_basic_map
*read_disjunct(struct isl_stream
*s
,
497 struct vars
**v
, __isl_take isl_dim
*dim
)
499 struct isl_basic_map
*bmap
;
501 bmap
= isl_basic_map_alloc_dim(dim
, 0, 0, 0);
505 bmap
= add_constraints(s
, v
, bmap
);
506 bmap
= isl_basic_map_simplify(bmap
);
507 bmap
= isl_basic_map_finalize(bmap
);
511 static struct isl_map
*read_disjuncts(struct isl_stream
*s
,
512 struct vars
**v
, __isl_take isl_dim
*dim
)
514 struct isl_token
*tok
;
517 tok
= isl_stream_next_token(s
);
519 isl_stream_error(s
, NULL
, "unexpected EOF");
522 if (tok
->type
== '}') {
523 isl_stream_push_token(s
, tok
);
524 return isl_map_universe(dim
);
526 isl_stream_push_token(s
, tok
);
528 map
= isl_map_empty(isl_dim_copy(dim
));
530 struct isl_basic_map
*bmap
;
532 bmap
= read_disjunct(s
, v
, isl_dim_copy(dim
));
533 map
= isl_map_union(map
, isl_map_from_basic_map(bmap
));
535 tok
= isl_stream_next_token(s
);
536 if (!tok
|| tok
->type
!= ISL_TOKEN_OR
)
541 isl_stream_push_token(s
, tok
);
550 static __isl_give isl_basic_map
*basic_map_read_polylib_constraint(
551 struct isl_stream
*s
, __isl_take isl_basic_map
*bmap
)
554 struct isl_token
*tok
;
564 nparam
= isl_basic_map_dim(bmap
, isl_dim_param
);
565 dim
= isl_basic_map_dim(bmap
, isl_dim_out
);
567 tok
= isl_stream_next_token(s
);
568 if (!tok
|| tok
->type
!= ISL_TOKEN_VALUE
) {
569 isl_stream_error(s
, tok
, "expecting coefficient");
571 isl_stream_push_token(s
, tok
);
574 if (!tok
->on_new_line
) {
575 isl_stream_error(s
, tok
, "coefficient should appear on new line");
576 isl_stream_push_token(s
, tok
);
580 type
= isl_int_get_si(tok
->u
.v
);
583 isl_assert(s
->ctx
, type
== 0 || type
== 1, goto error
);
585 k
= isl_basic_map_alloc_equality(bmap
);
588 k
= isl_basic_map_alloc_inequality(bmap
);
594 for (j
= 0; j
< dim
; ++j
) {
595 tok
= isl_stream_next_token(s
);
596 if (!tok
|| tok
->type
!= ISL_TOKEN_VALUE
) {
597 isl_stream_error(s
, tok
, "expecting coefficient");
599 isl_stream_push_token(s
, tok
);
602 isl_int_set(c
[1 + nparam
+ j
], tok
->u
.v
);
605 for (j
= 0; j
< nparam
; ++j
) {
606 tok
= isl_stream_next_token(s
);
607 if (!tok
|| tok
->type
!= ISL_TOKEN_VALUE
) {
608 isl_stream_error(s
, tok
, "expecting coefficient");
610 isl_stream_push_token(s
, tok
);
613 isl_int_set(c
[1 + j
], tok
->u
.v
);
616 tok
= isl_stream_next_token(s
);
617 if (!tok
|| tok
->type
!= ISL_TOKEN_VALUE
) {
618 isl_stream_error(s
, tok
, "expecting coefficient");
620 isl_stream_push_token(s
, tok
);
623 isl_int_set(c
[0], tok
->u
.v
);
628 isl_basic_map_free(bmap
);
632 static __isl_give isl_basic_map
*basic_map_read_polylib(struct isl_stream
*s
,
636 struct isl_token
*tok
;
637 struct isl_token
*tok2
;
641 struct isl_basic_map
*bmap
= NULL
;
646 tok
= isl_stream_next_token(s
);
648 isl_stream_error(s
, NULL
, "unexpected EOF");
651 tok2
= isl_stream_next_token(s
);
654 isl_stream_error(s
, NULL
, "unexpected EOF");
657 n_row
= isl_int_get_si(tok
->u
.v
);
658 n_col
= isl_int_get_si(tok2
->u
.v
);
659 on_new_line
= tok2
->on_new_line
;
660 isl_token_free(tok2
);
662 isl_assert(s
->ctx
, !on_new_line
, return NULL
);
663 isl_assert(s
->ctx
, n_row
>= 0, return NULL
);
664 isl_assert(s
->ctx
, n_col
>= 2 + nparam
, return NULL
);
665 dim
= n_col
- 2 - nparam
;
666 bmap
= isl_basic_map_alloc(s
->ctx
, nparam
, 0, dim
, 0, n_row
, n_row
);
670 for (i
= 0; i
< n_row
; ++i
)
671 bmap
= basic_map_read_polylib_constraint(s
, bmap
);
673 bmap
= isl_basic_map_simplify(bmap
);
674 bmap
= isl_basic_map_finalize(bmap
);
678 static struct isl_map
*map_read_polylib(struct isl_stream
*s
, int nparam
)
680 struct isl_token
*tok
;
681 struct isl_token
*tok2
;
685 tok
= isl_stream_next_token(s
);
687 isl_stream_error(s
, NULL
, "unexpected EOF");
690 tok2
= isl_stream_next_token(s
);
693 isl_stream_error(s
, NULL
, "unexpected EOF");
696 if (!tok2
->on_new_line
) {
697 isl_stream_push_token(s
, tok2
);
698 isl_stream_push_token(s
, tok
);
699 return isl_map_from_basic_map(basic_map_read_polylib(s
, nparam
));
701 isl_stream_push_token(s
, tok2
);
702 n
= isl_int_get_si(tok
->u
.v
);
705 isl_assert(s
->ctx
, n
>= 1, return NULL
);
707 map
= isl_map_from_basic_map(basic_map_read_polylib(s
, nparam
));
709 for (i
= 1; i
< n
; ++i
)
710 map
= isl_map_union(map
,
711 isl_map_from_basic_map(basic_map_read_polylib(s
, nparam
)));
716 static struct isl_dim
*set_names(struct isl_dim
*dim
, struct vars
*vars
,
717 enum isl_dim_type type
, int offset
, int n
)
722 for (i
= 0, v
= vars
->v
; i
< offset
; ++i
, v
= v
->next
)
724 for (i
= n
- 1; i
>= 0; --i
, v
= v
->next
)
725 dim
= isl_dim_set_name(dim
, type
, i
, v
->name
);
730 static struct isl_dim
*dim_from_vars(struct vars
*vars
,
731 int nparam
, int n_in
, int n_out
)
735 dim
= isl_dim_alloc(vars
->ctx
, nparam
, n_in
, n_out
);
736 dim
= set_names(dim
, vars
, isl_dim_param
, n_out
+ n_in
, nparam
);
737 dim
= set_names(dim
, vars
, isl_dim_in
, n_out
, n_in
);
738 dim
= set_names(dim
, vars
, isl_dim_out
, 0, n_out
);
743 static struct isl_map
*map_read(struct isl_stream
*s
, int nparam
)
745 struct isl_dim
*dim
= NULL
;
746 struct isl_map
*map
= NULL
;
747 struct isl_token
*tok
;
748 struct vars
*v
= NULL
;
752 tok
= isl_stream_next_token(s
);
754 isl_stream_error(s
, NULL
, "unexpected EOF");
757 if (tok
->type
== ISL_TOKEN_VALUE
) {
758 isl_stream_push_token(s
, tok
);
759 return map_read_polylib(s
, nparam
);
761 v
= vars_new(s
->ctx
);
762 if (tok
->type
== '[') {
763 isl_stream_push_token(s
, tok
);
764 v
= read_tuple(s
, v
);
768 isl_assert(s
->ctx
, nparam
== v
->n
, goto error
);
770 tok
= isl_stream_next_token(s
);
771 if (!tok
|| tok
->type
!= ISL_TOKEN_TO
) {
772 isl_stream_error(s
, tok
, "expecting '->'");
774 isl_stream_push_token(s
, tok
);
778 tok
= isl_stream_next_token(s
);
782 if (!tok
|| tok
->type
!= '{') {
783 isl_stream_error(s
, tok
, "expecting '{'");
785 isl_stream_push_token(s
, tok
);
789 v
= read_tuple(s
, v
);
793 tok
= isl_stream_next_token(s
);
794 if (tok
&& tok
->type
== ISL_TOKEN_TO
) {
796 v
= read_tuple(s
, v
);
799 n2
= v
->n
- n1
- nparam
;
802 isl_stream_push_token(s
, tok
);
806 dim
= dim_from_vars(v
, nparam
, n1
, n2
);
807 tok
= isl_stream_next_token(s
);
809 isl_stream_error(s
, NULL
, "unexpected EOF");
812 if (tok
->type
== ':') {
814 map
= read_disjuncts(s
, &v
, isl_dim_copy(dim
));
815 tok
= isl_stream_next_token(s
);
817 map
= isl_map_universe(isl_dim_copy(dim
));
818 if (tok
&& tok
->type
== '}') {
821 isl_stream_error(s
, tok
, "unexpected isl_token");
838 static struct isl_basic_map
*basic_map_read(struct isl_stream
*s
, int nparam
)
841 struct isl_basic_map
*bmap
;
843 map
= map_read(s
, nparam
);
847 isl_assert(map
->ctx
, map
->n
<= 1, goto error
);
850 bmap
= isl_basic_map_empty_like_map(map
);
852 bmap
= isl_basic_map_copy(map
->p
[0]);
862 __isl_give isl_basic_map
*isl_basic_map_read_from_file(isl_ctx
*ctx
,
863 FILE *input
, int nparam
)
865 struct isl_basic_map
*bmap
;
866 struct isl_stream
*s
= isl_stream_new_file(ctx
, input
);
869 bmap
= basic_map_read(s
, nparam
);
874 __isl_give isl_basic_set
*isl_basic_set_read_from_file(isl_ctx
*ctx
,
875 FILE *input
, int nparam
)
877 struct isl_basic_map
*bmap
;
878 bmap
= isl_basic_map_read_from_file(ctx
, input
, nparam
);
881 isl_assert(ctx
, isl_basic_map_n_in(bmap
) == 0, goto error
);
882 return (struct isl_basic_set
*)bmap
;
884 isl_basic_map_free(bmap
);
888 struct isl_basic_map
*isl_basic_map_read_from_str(struct isl_ctx
*ctx
,
889 const char *str
, int nparam
)
891 struct isl_basic_map
*bmap
;
892 struct isl_stream
*s
= isl_stream_new_str(ctx
, str
);
895 bmap
= basic_map_read(s
, nparam
);
900 struct isl_basic_set
*isl_basic_set_read_from_str(struct isl_ctx
*ctx
,
901 const char *str
, int nparam
)
903 struct isl_basic_map
*bmap
;
904 bmap
= isl_basic_map_read_from_str(ctx
, str
, nparam
);
907 isl_assert(ctx
, isl_basic_map_n_in(bmap
) == 0, goto error
);
908 return (struct isl_basic_set
*)bmap
;
910 isl_basic_map_free(bmap
);
914 __isl_give isl_map
*isl_map_read_from_file(struct isl_ctx
*ctx
,
915 FILE *input
, int nparam
)
918 struct isl_stream
*s
= isl_stream_new_file(ctx
, input
);
921 map
= map_read(s
, nparam
);
926 __isl_give isl_map
*isl_map_read_from_str(struct isl_ctx
*ctx
,
927 const char *str
, int nparam
)
930 struct isl_stream
*s
= isl_stream_new_str(ctx
, str
);
933 map
= map_read(s
, nparam
);
938 __isl_give isl_set
*isl_set_read_from_file(struct isl_ctx
*ctx
,
939 FILE *input
, int nparam
)
942 map
= isl_map_read_from_file(ctx
, input
, nparam
);
945 isl_assert(ctx
, isl_map_n_in(map
) == 0, goto error
);
946 return (struct isl_set
*)map
;
952 struct isl_set
*isl_set_read_from_str(struct isl_ctx
*ctx
,
953 const char *str
, int nparam
)
956 map
= isl_map_read_from_str(ctx
, str
, nparam
);
959 isl_assert(ctx
, isl_map_n_in(map
) == 0, goto error
);
960 return (struct isl_set
*)map
;
966 static char *next_line(FILE *input
, char *line
, unsigned len
)
971 if (!(p
= fgets(line
, len
, input
)))
973 while (isspace(*p
) && *p
!= '\n')
975 } while (*p
== '#' || *p
== '\n');
980 static struct isl_vec
*isl_vec_read_from_file_polylib(struct isl_ctx
*ctx
,
983 struct isl_vec
*vec
= NULL
;
992 isl_assert(ctx
, next_line(input
, line
, sizeof(line
)), return NULL
);
993 isl_assert(ctx
, sscanf(line
, "%u", &size
) == 1, return NULL
);
995 vec
= isl_vec_alloc(ctx
, size
);
997 p
= next_line(input
, line
, sizeof(line
));
998 isl_assert(ctx
, p
, goto error
);
1000 for (j
= 0; j
< size
; ++j
) {
1001 n
= sscanf(p
, "%s%n", val
, &offset
);
1002 isl_assert(ctx
, n
!= 0, goto error
);
1003 isl_int_read(vec
->el
[j
], val
);
1013 struct isl_vec
*isl_vec_read_from_file(struct isl_ctx
*ctx
,
1014 FILE *input
, unsigned input_format
)
1016 if (input_format
== ISL_FORMAT_POLYLIB
)
1017 return isl_vec_read_from_file_polylib(ctx
, input
);
1019 isl_assert(ctx
, 0, return NULL
);