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 __isl_give isl_mat *accept_affine_list(struct isl_stream *s,
217 struct isl_token *tok = NULL;
219 vec = accept_affine(s, v);
220 mat = isl_mat_from_row_vec(vec);
225 tok = isl_stream_next_token(s);
227 isl_stream_error(s, NULL, "unexpected EOF");
230 if (tok->type != ',') {
231 isl_stream_push_token(s, tok);
236 vec = accept_affine(s, v);
237 mat = isl_mat_vec_concat(mat, vec);
248 static struct isl_basic_map *add_div_definition(struct isl_stream *s,
249 struct vars *v, struct isl_basic_map *bmap, int k)
251 struct isl_token *tok;
255 if (isl_stream_eat(s, '['))
258 tok = isl_stream_next_token(s);
261 if (tok->type == '(') {
265 isl_stream_push_token(s, tok);
267 aff = accept_affine(s, v);
271 isl_seq_cpy(bmap->div[k] + 1, aff->el, aff->size);
275 if (seen_paren && isl_stream_eat(s, ')'))
277 if (isl_stream_eat(s, '/'))
280 tok = isl_stream_next_token(s);
283 if (tok->type != ISL_TOKEN_VALUE) {
284 isl_stream_error(s, tok, "expected denominator");
285 isl_stream_push_token(s, tok);
288 isl_int_set(bmap->div[k][0], tok->u.v);
291 if (isl_stream_eat(s, ']'))
294 if (isl_basic_map_add_div_constraints(bmap, k) < 0)
299 isl_basic_map_free(bmap);
303 static struct isl_basic_map *read_defined_var_list(struct isl_stream *s,
304 struct vars *v, struct isl_basic_map *bmap)
306 struct isl_token *tok;
308 while ((tok = isl_stream_next_token(s)) != NULL) {
312 unsigned total = isl_basic_map_total_dim(bmap);
314 if (tok->type != ISL_TOKEN_IDENT)
317 p = vars_pos(v, tok->u.s, -1);
321 isl_stream_error(s, tok, "expecting unique identifier");
326 bmap = isl_basic_map_cow(bmap);
327 bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
330 if ((k = isl_basic_map_alloc_div(bmap)) < 0)
332 isl_seq_clr(bmap->div[k], 1 + 1 + total);
334 tok = isl_stream_next_token(s);
335 if (tok && tok->type == '=') {
337 bmap = add_div_definition(s, v, bmap, k);
338 tok = isl_stream_next_token(s);
341 if (!tok || tok->type != ',')
347 isl_stream_push_token(s, tok);
352 isl_basic_map_free(bmap);
356 static struct vars *read_tuple(struct isl_stream *s, struct vars *v)
358 struct isl_token *tok;
360 tok = isl_stream_next_token(s);
361 if (!tok || tok->type != '[') {
362 isl_stream_error(s, tok, "expecting '['");
366 v = read_var_list(s, v);
367 tok = isl_stream_next_token(s);
368 if (!tok || tok->type != ']') {
369 isl_stream_error(s, tok, "expecting ']'");
382 static struct isl_basic_map *add_constraints(struct isl_stream *s,
383 struct vars **v, struct isl_basic_map *bmap);
385 static struct isl_basic_map *add_exists(struct isl_stream *s,
386 struct vars **v, struct isl_basic_map *bmap)
388 struct isl_token *tok;
395 tok = isl_stream_next_token(s);
398 if (tok->type == '(') {
402 isl_stream_push_token(s, tok);
404 bmap = read_defined_var_list(s, *v, bmap);
408 if (isl_stream_eat(s, ':'))
410 bmap = add_constraints(s, v, bmap);
411 if (seen_paren && isl_stream_eat(s, ')'))
415 isl_basic_map_free(bmap);
419 static __isl_give isl_basic_map *construct_constraint(
420 __isl_take isl_basic_map *bmap, enum isl_token_type type,
421 isl_int *left, isl_int *right)
429 len = 1 + isl_basic_map_total_dim(bmap);
432 k = isl_basic_map_alloc_inequality(bmap);
435 if (type == ISL_TOKEN_LE)
436 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
439 else if (type == ISL_TOKEN_GE)
440 isl_seq_combine(bmap->ineq[k], ctx->one, left,
443 else if (type == ISL_TOKEN_LT) {
444 isl_seq_combine(bmap->ineq[k], ctx->negone, left,
447 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
448 } else if (type == ISL_TOKEN_GT) {
449 isl_seq_combine(bmap->ineq[k], ctx->one, left,
452 isl_int_sub_ui(bmap->ineq[k][0], bmap->ineq[k][0], 1);
454 isl_seq_combine(bmap->ineq[k], ctx->one, left,
457 isl_basic_map_inequality_to_equality(bmap, k);
462 isl_basic_map_free(bmap);
466 static struct isl_basic_map *add_constraint(struct isl_stream *s,
467 struct vars **v, struct isl_basic_map *bmap)
470 unsigned total = isl_basic_map_total_dim(bmap);
471 struct isl_token *tok = NULL;
472 struct isl_mat *aff1 = NULL, *aff2 = NULL;
474 tok = isl_stream_next_token(s);
477 if (tok->type == ISL_TOKEN_EXISTS) {
479 return add_exists(s, v, bmap);
481 isl_stream_push_token(s, tok);
484 bmap = isl_basic_map_cow(bmap);
486 aff1 = accept_affine_list(s, *v);
489 tok = isl_stream_next_token(s);
498 isl_stream_error(s, tok, "missing operator");
499 isl_stream_push_token(s, tok);
503 aff2 = accept_affine_list(s, *v);
506 isl_assert(aff1->ctx, aff1->n_col == 1 + total, goto error);
507 isl_assert(aff2->ctx, aff2->n_col == 1 + total, goto error);
509 bmap = isl_basic_map_extend_constraints(bmap, 0, aff1->n_row * aff2->n_row);
510 for (i = 0; i < aff1->n_row; ++i)
511 for (j = 0; j < aff2->n_row; ++j)
512 bmap = construct_constraint(bmap, tok->type,
513 aff1->row[i], aff2->row[j]);
524 isl_basic_map_free(bmap);
528 static struct isl_basic_map *add_constraints(struct isl_stream *s,
529 struct vars **v, struct isl_basic_map *bmap)
531 struct isl_token *tok;
534 bmap = add_constraint(s, v, bmap);
537 tok = isl_stream_next_token(s);
539 isl_stream_error(s, NULL, "unexpected EOF");
542 if (tok->type != ISL_TOKEN_AND)
546 isl_stream_push_token(s, tok);
552 isl_basic_map_free(bmap);
556 static struct isl_basic_map *read_disjunct(struct isl_stream *s,
557 struct vars **v, __isl_take isl_dim *dim)
559 struct isl_basic_map *bmap;
561 bmap = isl_basic_map_alloc_dim(dim, 0, 0, 0);
565 bmap = add_constraints(s, v, bmap);
566 bmap = isl_basic_map_simplify(bmap);
567 bmap = isl_basic_map_finalize(bmap);
571 static struct isl_map *read_disjuncts(struct isl_stream *s,
572 struct vars **v, __isl_take isl_dim *dim)
574 struct isl_token *tok;
577 tok = isl_stream_next_token(s);
579 isl_stream_error(s, NULL, "unexpected EOF");
582 if (tok->type == '}') {
583 isl_stream_push_token(s, tok);
584 return isl_map_universe(dim);
586 isl_stream_push_token(s, tok);
588 map = isl_map_empty(isl_dim_copy(dim));
590 struct isl_basic_map *bmap;
592 bmap = read_disjunct(s, v, isl_dim_copy(dim));
593 map = isl_map_union(map, isl_map_from_basic_map(bmap));
595 tok = isl_stream_next_token(s);
596 if (!tok || tok->type != ISL_TOKEN_OR)
601 isl_stream_push_token(s, tok);
610 static int polylib_pos_to_isl_pos(__isl_keep isl_basic_map *bmap, int pos)
612 if (pos < isl_basic_map_dim(bmap, isl_dim_out))
613 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
614 isl_basic_map_dim(bmap, isl_dim_in) + pos;
615 pos -= isl_basic_map_dim(bmap, isl_dim_out);
617 if (pos < isl_basic_map_dim(bmap, isl_dim_in))
618 return 1 + isl_basic_map_dim(bmap, isl_dim_param) + pos;
619 pos -= isl_basic_map_dim(bmap, isl_dim_in);
621 if (pos < isl_basic_map_dim(bmap, isl_dim_div))
622 return 1 + isl_basic_map_dim(bmap, isl_dim_param) +
623 isl_basic_map_dim(bmap, isl_dim_in) +
624 isl_basic_map_dim(bmap, isl_dim_out) + pos;
625 pos -= isl_basic_map_dim(bmap, isl_dim_div);
627 if (pos < isl_basic_map_dim(bmap, isl_dim_param))
633 static __isl_give isl_basic_map *basic_map_read_polylib_constraint(
634 struct isl_stream *s, __isl_take isl_basic_map *bmap)
637 struct isl_token *tok;
647 nparam = isl_basic_map_dim(bmap, isl_dim_param);
648 dim = isl_basic_map_dim(bmap, isl_dim_out);
650 tok = isl_stream_next_token(s);
651 if (!tok || tok->type != ISL_TOKEN_VALUE) {
652 isl_stream_error(s, tok, "expecting coefficient");
654 isl_stream_push_token(s, tok);
657 if (!tok->on_new_line) {
658 isl_stream_error(s, tok, "coefficient should appear on new line");
659 isl_stream_push_token(s, tok);
663 type = isl_int_get_si(tok->u.v);
666 isl_assert(s->ctx, type == 0 || type == 1, goto error);
668 k = isl_basic_map_alloc_equality(bmap);
671 k = isl_basic_map_alloc_inequality(bmap);
677 for (j = 0; j < 1 + isl_basic_map_total_dim(bmap); ++j) {
679 tok = isl_stream_next_token(s);
680 if (!tok || tok->type != ISL_TOKEN_VALUE) {
681 isl_stream_error(s, tok, "expecting coefficient");
683 isl_stream_push_token(s, tok);
686 if (tok->on_new_line) {
687 isl_stream_error(s, tok,
688 "coefficient should not appear on new line");
689 isl_stream_push_token(s, tok);
692 pos = polylib_pos_to_isl_pos(bmap, j);
693 isl_int_set(c[pos], tok->u.v);
699 isl_basic_map_free(bmap);
703 static __isl_give isl_basic_map *basic_map_read_polylib(struct isl_stream *s,
707 struct isl_token *tok;
708 struct isl_token *tok2;
711 unsigned in = 0, out, local = 0;
712 struct isl_basic_map *bmap = NULL;
717 tok = isl_stream_next_token(s);
719 isl_stream_error(s, NULL, "unexpected EOF");
722 tok2 = isl_stream_next_token(s);
725 isl_stream_error(s, NULL, "unexpected EOF");
728 n_row = isl_int_get_si(tok->u.v);
729 n_col = isl_int_get_si(tok2->u.v);
730 on_new_line = tok2->on_new_line;
731 isl_token_free(tok2);
733 isl_assert(s->ctx, !on_new_line, return NULL);
734 isl_assert(s->ctx, n_row >= 0, return NULL);
735 isl_assert(s->ctx, n_col >= 2 + nparam, return NULL);
736 tok = isl_stream_next_token_on_same_line(s);
738 if (tok->type != ISL_TOKEN_VALUE) {
739 isl_stream_error(s, tok,
740 "expecting number of output dimensions");
741 isl_stream_push_token(s, tok);
744 out = isl_int_get_si(tok->u.v);
747 tok = isl_stream_next_token_on_same_line(s);
748 if (!tok || tok->type != ISL_TOKEN_VALUE) {
749 isl_stream_error(s, tok,
750 "expecting number of input dimensions");
752 isl_stream_push_token(s, tok);
755 in = isl_int_get_si(tok->u.v);
758 tok = isl_stream_next_token_on_same_line(s);
759 if (!tok || tok->type != ISL_TOKEN_VALUE) {
760 isl_stream_error(s, tok,
761 "expecting number of existentials");
763 isl_stream_push_token(s, tok);
766 local = isl_int_get_si(tok->u.v);
769 tok = isl_stream_next_token_on_same_line(s);
770 if (!tok || tok->type != ISL_TOKEN_VALUE) {
771 isl_stream_error(s, tok,
772 "expecting number of parameters");
774 isl_stream_push_token(s, tok);
777 nparam = isl_int_get_si(tok->u.v);
779 if (n_col != 1 + out + in + local + nparam + 1) {
780 isl_stream_error(s, NULL,
781 "dimensions don't match");
785 out = n_col - 2 - nparam;
786 bmap = isl_basic_map_alloc(s->ctx, nparam, in, out, local, n_row, n_row);
790 for (i = 0; i < local; ++i) {
791 int k = isl_basic_map_alloc_div(bmap);
796 for (i = 0; i < n_row; ++i)
797 bmap = basic_map_read_polylib_constraint(s, bmap);
799 bmap = isl_basic_map_simplify(bmap);
800 bmap = isl_basic_map_finalize(bmap);
803 isl_basic_map_free(bmap);
807 static struct isl_map *map_read_polylib(struct isl_stream *s, int nparam)
809 struct isl_token *tok;
810 struct isl_token *tok2;
814 tok = isl_stream_next_token(s);
816 isl_stream_error(s, NULL, "unexpected EOF");
819 tok2 = isl_stream_next_token(s);
822 isl_stream_error(s, NULL, "unexpected EOF");
825 if (!tok2->on_new_line) {
826 isl_stream_push_token(s, tok2);
827 isl_stream_push_token(s, tok);
828 return isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
830 isl_stream_push_token(s, tok2);
831 n = isl_int_get_si(tok->u.v);
834 isl_assert(s->ctx, n >= 1, return NULL);
836 map = isl_map_from_basic_map(basic_map_read_polylib(s, nparam));
838 for (i = 1; i < n; ++i)
839 map = isl_map_union(map,
840 isl_map_from_basic_map(basic_map_read_polylib(s, nparam)));
845 static struct isl_dim *set_names(struct isl_dim *dim, struct vars *vars,
846 enum isl_dim_type type, int offset, int n)
851 for (i = 0, v = vars->v; i < offset; ++i, v = v->next)
853 for (i = n - 1; i >= 0; --i, v = v->next)
854 dim = isl_dim_set_name(dim, type, i, v->name);
859 static struct isl_dim *dim_from_vars(struct vars *vars,
860 int nparam, int n_in, int n_out)
864 dim = isl_dim_alloc(vars->ctx, nparam, n_in, n_out);
865 dim = set_names(dim, vars, isl_dim_param, n_out + n_in, nparam);
866 dim = set_names(dim, vars, isl_dim_in, n_out, n_in);
867 dim = set_names(dim, vars, isl_dim_out, 0, n_out);
872 static struct isl_map *map_read(struct isl_stream *s, int nparam)
874 struct isl_dim *dim = NULL;
875 struct isl_map *map = NULL;
876 struct isl_token *tok;
877 struct vars *v = NULL;
881 tok = isl_stream_next_token(s);
883 isl_stream_error(s, NULL, "unexpected EOF");
886 if (tok->type == ISL_TOKEN_VALUE) {
887 isl_stream_push_token(s, tok);
888 return map_read_polylib(s, nparam);
890 v = vars_new(s->ctx);
891 if (tok->type == '[') {
892 isl_stream_push_token(s, tok);
893 v = read_tuple(s, v);
897 isl_assert(s->ctx, nparam == v->n, goto error);
899 tok = isl_stream_next_token(s);
900 if (!tok || tok->type != ISL_TOKEN_TO) {
901 isl_stream_error(s, tok, "expecting '->'");
903 isl_stream_push_token(s, tok);
907 tok = isl_stream_next_token(s);
911 if (!tok || tok->type != '{') {
912 isl_stream_error(s, tok, "expecting '{'");
914 isl_stream_push_token(s, tok);
918 v = read_tuple(s, v);
922 tok = isl_stream_next_token(s);
923 if (tok && tok->type == ISL_TOKEN_TO) {
925 v = read_tuple(s, v);
928 n2 = v->n - n1 - nparam;
931 isl_stream_push_token(s, tok);
935 dim = dim_from_vars(v, nparam, n1, n2);
936 tok = isl_stream_next_token(s);
938 isl_stream_error(s, NULL, "unexpected EOF");
941 if (tok->type == ':') {
943 map = read_disjuncts(s, &v, isl_dim_copy(dim));
944 tok = isl_stream_next_token(s);
946 map = isl_map_universe(isl_dim_copy(dim));
947 if (tok && tok->type == '}') {
950 isl_stream_error(s, tok, "unexpected isl_token");
967 static struct isl_basic_map *basic_map_read(struct isl_stream *s, int nparam)
970 struct isl_basic_map *bmap;
972 map = map_read(s, nparam);
976 isl_assert(map->ctx, map->n <= 1, goto error);
979 bmap = isl_basic_map_empty_like_map(map);
981 bmap = isl_basic_map_copy(map->p[0]);
991 __isl_give isl_basic_map *isl_basic_map_read_from_file(isl_ctx *ctx,
992 FILE *input, int nparam)
994 struct isl_basic_map *bmap;
995 struct isl_stream *s = isl_stream_new_file(ctx, input);
998 bmap = basic_map_read(s, nparam);
1003 __isl_give isl_basic_set *isl_basic_set_read_from_file(isl_ctx *ctx,
1004 FILE *input, int nparam)
1006 struct isl_basic_map *bmap;
1007 bmap = isl_basic_map_read_from_file(ctx, input, nparam);
1010 isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
1011 return (struct isl_basic_set *)bmap;
1013 isl_basic_map_free(bmap);
1017 struct isl_basic_map *isl_basic_map_read_from_str(struct isl_ctx *ctx,
1018 const char *str, int nparam)
1020 struct isl_basic_map *bmap;
1021 struct isl_stream *s = isl_stream_new_str(ctx, str);
1024 bmap = basic_map_read(s, nparam);
1029 struct isl_basic_set *isl_basic_set_read_from_str(struct isl_ctx *ctx,
1030 const char *str, int nparam)
1032 struct isl_basic_map *bmap;
1033 bmap = isl_basic_map_read_from_str(ctx, str, nparam);
1036 isl_assert(ctx, isl_basic_map_n_in(bmap) == 0, goto error);
1037 return (struct isl_basic_set *)bmap;
1039 isl_basic_map_free(bmap);
1043 __isl_give isl_map *isl_map_read_from_file(struct isl_ctx *ctx,
1044 FILE *input, int nparam)
1046 struct isl_map *map;
1047 struct isl_stream *s = isl_stream_new_file(ctx, input);
1050 map = map_read(s, nparam);
1055 __isl_give isl_map *isl_map_read_from_str(struct isl_ctx *ctx,
1056 const char *str, int nparam)
1058 struct isl_map *map;
1059 struct isl_stream *s = isl_stream_new_str(ctx, str);
1062 map = map_read(s, nparam);
1067 __isl_give isl_set *isl_set_read_from_file(struct isl_ctx *ctx,
1068 FILE *input, int nparam)
1070 struct isl_map *map;
1071 map = isl_map_read_from_file(ctx, input, nparam);
1074 isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
1075 return (struct isl_set *)map;
1081 struct isl_set *isl_set_read_from_str(struct isl_ctx *ctx,
1082 const char *str, int nparam)
1084 struct isl_map *map;
1085 map = isl_map_read_from_str(ctx, str, nparam);
1088 isl_assert(ctx, isl_map_n_in(map) == 0, goto error);
1089 return (struct isl_set *)map;
1095 static char *next_line(FILE *input, char *line, unsigned len)
1100 if (!(p = fgets(line, len, input)))
1102 while (isspace(*p) && *p != '\n')
1104 } while (*p == '#' || *p == '\n');
1109 static struct isl_vec *isl_vec_read_from_file_polylib(struct isl_ctx *ctx,
1112 struct isl_vec *vec = NULL;
1121 isl_assert(ctx, next_line(input, line, sizeof(line)), return NULL);
1122 isl_assert(ctx, sscanf(line, "%u", &size) == 1, return NULL);
1124 vec = isl_vec_alloc(ctx, size);
1126 p = next_line(input, line, sizeof(line));
1127 isl_assert(ctx, p, goto error);
1129 for (j = 0; j < size; ++j) {
1130 n = sscanf(p, "%s%n", val, &offset);
1131 isl_assert(ctx, n != 0, goto error);
1132 isl_int_read(vec->el[j], val);
1142 struct isl_vec *isl_vec_read_from_file(struct isl_ctx *ctx,
1143 FILE *input, unsigned input_format)
1145 if (input_format == ISL_FORMAT_POLYLIB)
1146 return isl_vec_read_from_file_polylib(ctx, input);
1148 isl_assert(ctx, 0, return NULL);