2 * Copyright 2008-2009 Katholieke Universiteit Leuven
4 * Use of this software is governed by the GNU LGPLv2.1 license
6 * Written by Sven Verdoolaege, K.U.Leuven, Departement
7 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
14 #include <isl_stream_private.h>
20 enum isl_token_type type;
23 static int same_name(const void *entry, const void *val)
25 const struct isl_keyword *keyword = (const struct isl_keyword *)entry;
27 return !strcmp(keyword->name, val);
30 enum isl_token_type isl_stream_register_keyword(struct isl_stream *s,
33 struct isl_hash_table_entry *entry;
34 struct isl_keyword *keyword;
38 s->keywords = isl_hash_table_alloc(s->ctx, 10);
40 return ISL_TOKEN_ERROR;
41 s->next_type = ISL_TOKEN_LAST;
44 name_hash = isl_hash_string(isl_hash_init(), name);
46 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash,
49 return ISL_TOKEN_ERROR;
51 keyword = entry->data;
55 keyword = isl_calloc_type(s->ctx, struct isl_keyword);
57 return ISL_TOKEN_ERROR;
58 keyword->type = s->next_type++;
59 keyword->name = strdup(name);
62 return ISL_TOKEN_ERROR;
64 entry->data = keyword;
69 struct isl_token *isl_token_new(isl_ctx *ctx,
70 int line, int col, unsigned on_new_line)
72 struct isl_token *tok = isl_alloc_type(ctx, struct isl_token);
77 tok->on_new_line = on_new_line;
83 void isl_token_free(struct isl_token *tok)
87 if (tok->type == ISL_TOKEN_VALUE)
88 isl_int_clear(tok->u.v);
89 else if (tok->type == ISL_TOKEN_MAP)
90 isl_map_free(tok->u.map);
91 else if (tok->type == ISL_TOKEN_AFF)
92 isl_pw_aff_free(tok->u.pwaff);
98 void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg)
100 int line = tok ? tok->line : s->line;
101 int col = tok ? tok->col : s->col;
102 fprintf(stderr, "syntax error (%d, %d): %s\n", line, col, msg);
105 fprintf(stderr, "got '%c'\n", tok->type);
106 else if (tok->type == ISL_TOKEN_IDENT)
107 fprintf(stderr, "got ident '%s'\n", tok->u.s);
108 else if (tok->is_keyword)
109 fprintf(stderr, "got keyword '%s'\n", tok->u.s);
110 else if (tok->type == ISL_TOKEN_VALUE) {
111 fprintf(stderr, "got value '");
112 isl_int_print(stderr, tok->u.v, 0);
113 fprintf(stderr, "'\n");
114 } else if (tok->type == ISL_TOKEN_MAP) {
116 fprintf(stderr, "got map '");
117 p = isl_printer_to_file(s->ctx, stderr);
118 p = isl_printer_print_map(p, tok->u.map);
120 fprintf(stderr, "'\n");
121 } else if (tok->type == ISL_TOKEN_AFF) {
123 fprintf(stderr, "got affine expression '");
124 p = isl_printer_to_file(s->ctx, stderr);
125 p = isl_printer_print_pw_aff(p, tok->u.pwaff);
127 fprintf(stderr, "'\n");
129 fprintf(stderr, "got token '%s'\n", tok->u.s);
131 fprintf(stderr, "got token type %d\n", tok->type);
135 static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
138 struct isl_stream *s = isl_alloc_type(ctx, struct isl_stream);
151 for (i = 0; i < 5; ++i)
156 s->buffer = isl_alloc_array(ctx, char, s->size);
165 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
167 struct isl_stream *s = isl_stream_new(ctx);
174 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
176 struct isl_stream *s = isl_stream_new(ctx);
183 static int stream_getc(struct isl_stream *s)
189 return s->c = s->un[--s->n_un];
210 static void isl_stream_ungetc(struct isl_stream *s, int c)
212 isl_assert(s->ctx, s->n_un < 5, return);
213 s->un[s->n_un++] = c;
217 static int isl_stream_getc(struct isl_stream *s)
228 isl_stream_ungetc(s, c);
233 static int isl_stream_push_char(struct isl_stream *s, int c)
235 if (s->len >= s->size) {
237 s->size = (3*s->size)/2;
238 buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
243 s->buffer[s->len++] = c;
247 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
249 isl_assert(s->ctx, s->n_token < 5, return);
250 s->tokens[s->n_token++] = tok;
253 static enum isl_token_type check_keywords(struct isl_stream *s)
255 struct isl_hash_table_entry *entry;
256 struct isl_keyword *keyword;
259 if (!strcasecmp(s->buffer, "exists"))
260 return ISL_TOKEN_EXISTS;
261 if (!strcasecmp(s->buffer, "and"))
262 return ISL_TOKEN_AND;
263 if (!strcasecmp(s->buffer, "or"))
265 if (!strcasecmp(s->buffer, "not"))
266 return ISL_TOKEN_NOT;
267 if (!strcasecmp(s->buffer, "infty"))
268 return ISL_TOKEN_INFTY;
269 if (!strcasecmp(s->buffer, "infinity"))
270 return ISL_TOKEN_INFTY;
271 if (!strcasecmp(s->buffer, "NaN"))
272 return ISL_TOKEN_NAN;
273 if (!strcasecmp(s->buffer, "min"))
274 return ISL_TOKEN_MIN;
275 if (!strcasecmp(s->buffer, "max"))
276 return ISL_TOKEN_MAX;
277 if (!strcasecmp(s->buffer, "rat"))
278 return ISL_TOKEN_RAT;
279 if (!strcasecmp(s->buffer, "true"))
280 return ISL_TOKEN_TRUE;
281 if (!strcasecmp(s->buffer, "false"))
282 return ISL_TOKEN_FALSE;
283 if (!strcasecmp(s->buffer, "ceild"))
284 return ISL_TOKEN_CEILD;
285 if (!strcasecmp(s->buffer, "floord"))
286 return ISL_TOKEN_FLOORD;
287 if (!strcasecmp(s->buffer, "mod"))
288 return ISL_TOKEN_MOD;
291 return ISL_TOKEN_IDENT;
293 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
294 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
297 keyword = entry->data;
298 return keyword->type;
301 return ISL_TOKEN_IDENT;
304 int isl_stream_skip_line(struct isl_stream *s)
308 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
312 return c == -1 ? -1 : 0;
315 static struct isl_token *next_token(struct isl_stream *s, int same_line)
318 struct isl_token *tok = NULL;
320 int old_line = s->line;
323 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
325 return s->tokens[--s->n_token];
328 if (same_line && s->c == '\n')
333 /* skip spaces and comment lines */
334 while ((c = isl_stream_getc(s)) != -1) {
336 if (isl_stream_skip_line(s) < 0)
341 } else if (!isspace(c) || (same_line && c == '\n'))
348 if (c == -1 || (same_line && c == '\n'))
367 tok = isl_token_new(s->ctx, line, col, old_line != line);
370 tok->type = (enum isl_token_type)c;
375 if ((c = isl_stream_getc(s)) == '>') {
376 tok = isl_token_new(s->ctx, line, col, old_line != line);
379 tok->u.s = strdup("->");
380 tok->type = ISL_TOKEN_TO;
384 isl_stream_ungetc(s, c);
386 tok = isl_token_new(s->ctx, line, col, old_line != line);
389 tok->type = (enum isl_token_type) '-';
393 if (c == '-' || isdigit(c)) {
394 int minus = c == '-';
395 tok = isl_token_new(s->ctx, line, col, old_line != line);
398 tok->type = ISL_TOKEN_VALUE;
399 isl_int_init(tok->u.v);
400 if (isl_stream_push_char(s, c))
402 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
403 if (isl_stream_push_char(s, c))
406 isl_stream_ungetc(s, c);
407 isl_stream_push_char(s, '\0');
408 isl_int_read(tok->u.v, s->buffer);
409 if (minus && isl_int_is_zero(tok->u.v)) {
411 tok->on_new_line = 0;
412 isl_stream_push_token(s, tok);
413 tok = isl_token_new(s->ctx, line, col, old_line != line);
416 tok->type = (enum isl_token_type) '-';
420 if (isalpha(c) || c == '_') {
421 tok = isl_token_new(s->ctx, line, col, old_line != line);
424 isl_stream_push_char(s, c);
425 while ((c = isl_stream_getc(s)) != -1 &&
426 (isalnum(c) || c == '_'))
427 isl_stream_push_char(s, c);
429 isl_stream_ungetc(s, c);
430 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
431 isl_stream_push_char(s, c);
433 isl_stream_ungetc(s, c);
434 isl_stream_push_char(s, '\0');
435 tok->type = check_keywords(s);
436 if (tok->type != ISL_TOKEN_IDENT)
438 tok->u.s = strdup(s->buffer);
444 tok = isl_token_new(s->ctx, line, col, old_line != line);
447 tok->type = ISL_TOKEN_STRING;
449 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
450 isl_stream_push_char(s, c);
452 isl_stream_error(s, NULL, "unterminated string");
455 isl_stream_push_char(s, '\0');
456 tok->u.s = strdup(s->buffer);
461 tok = isl_token_new(s->ctx, line, col, old_line != line);
464 if ((c = isl_stream_getc(s)) == '=') {
465 tok->u.s = strdup(":=");
466 tok->type = ISL_TOKEN_DEF;
470 isl_stream_ungetc(s, c);
471 tok->type = (enum isl_token_type) ':';
476 tok = isl_token_new(s->ctx, line, col, old_line != line);
479 if ((c = isl_stream_getc(s)) == '=') {
480 tok->u.s = strdup(">=");
481 tok->type = ISL_TOKEN_GE;
483 } else if (c == '>') {
484 if ((c = isl_stream_getc(s)) == '=') {
485 tok->u.s = strdup(">>=");
486 tok->type = ISL_TOKEN_LEX_GE;
489 tok->u.s = strdup(">>");
490 tok->type = ISL_TOKEN_LEX_GT;
492 tok->u.s = strdup(">");
493 tok->type = ISL_TOKEN_GT;
496 isl_stream_ungetc(s, c);
501 tok = isl_token_new(s->ctx, line, col, old_line != line);
504 if ((c = isl_stream_getc(s)) == '=') {
505 tok->u.s = strdup("<=");
506 tok->type = ISL_TOKEN_LE;
508 } else if (c == '<') {
509 if ((c = isl_stream_getc(s)) == '=') {
510 tok->u.s = strdup("<<=");
511 tok->type = ISL_TOKEN_LEX_LE;
514 tok->u.s = strdup("<<");
515 tok->type = ISL_TOKEN_LEX_LT;
517 tok->u.s = strdup("<");
518 tok->type = ISL_TOKEN_LT;
521 isl_stream_ungetc(s, c);
525 tok = isl_token_new(s->ctx, line, col, old_line != line);
528 tok->type = ISL_TOKEN_AND;
529 if ((c = isl_stream_getc(s)) != '&' && c != -1) {
530 tok->u.s = strdup("&");
531 isl_stream_ungetc(s, c);
533 tok->u.s = strdup("&&");
537 tok = isl_token_new(s->ctx, line, col, old_line != line);
540 tok->type = ISL_TOKEN_OR;
541 if ((c = isl_stream_getc(s)) != '|' && c != -1) {
542 tok->u.s = strdup("|");
543 isl_stream_ungetc(s, c);
545 tok->u.s = strdup("||");
549 tok = isl_token_new(s->ctx, line, col, old_line != line);
552 if ((c = isl_stream_getc(s)) != '\\' && c != -1) {
553 tok->type = (enum isl_token_type) '/';
554 isl_stream_ungetc(s, c);
556 tok->u.s = strdup("/\\");
557 tok->type = ISL_TOKEN_AND;
562 tok = isl_token_new(s->ctx, line, col, old_line != line);
565 if ((c = isl_stream_getc(s)) != '/' && c != -1) {
566 tok->type = (enum isl_token_type) '\\';
567 isl_stream_ungetc(s, c);
569 tok->u.s = strdup("\\/");
570 tok->type = ISL_TOKEN_OR;
575 tok = isl_token_new(s->ctx, line, col, old_line != line);
578 if ((c = isl_stream_getc(s)) == '=') {
579 tok->u.s = strdup("!=");
580 tok->type = ISL_TOKEN_NE;
583 tok->type = ISL_TOKEN_NOT;
584 tok->u.s = strdup("!");
587 isl_stream_ungetc(s, c);
591 tok = isl_token_new(s->ctx, line, col, old_line != line);
594 tok->type = ISL_TOKEN_UNKNOWN;
601 struct isl_token *isl_stream_next_token(struct isl_stream *s)
603 return next_token(s, 0);
606 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
608 return next_token(s, 1);
611 int isl_stream_eat_if_available(struct isl_stream *s, int type)
613 struct isl_token *tok;
615 tok = isl_stream_next_token(s);
618 if (tok->type == type) {
622 isl_stream_push_token(s, tok);
626 int isl_stream_next_token_is(struct isl_stream *s, int type)
628 struct isl_token *tok;
631 tok = isl_stream_next_token(s);
634 r = tok->type == type;
635 isl_stream_push_token(s, tok);
639 char *isl_stream_read_ident_if_available(struct isl_stream *s)
641 struct isl_token *tok;
643 tok = isl_stream_next_token(s);
646 if (tok->type == ISL_TOKEN_IDENT) {
647 char *ident = strdup(tok->u.s);
651 isl_stream_push_token(s, tok);
655 int isl_stream_eat(struct isl_stream *s, int type)
657 struct isl_token *tok;
659 tok = isl_stream_next_token(s);
662 if (tok->type == type) {
666 isl_stream_error(s, tok, "expecting other token");
667 isl_stream_push_token(s, tok);
671 int isl_stream_is_empty(struct isl_stream *s)
673 struct isl_token *tok;
675 tok = isl_stream_next_token(s);
680 isl_stream_push_token(s, tok);
684 static int free_keyword(void **p, void *user)
686 struct isl_keyword *keyword = *p;
694 void isl_stream_flush_tokens(struct isl_stream *s)
700 for (i = 0; i < s->n_token; ++i)
701 isl_token_free(s->tokens[i]);
705 void isl_stream_free(struct isl_stream *s)
710 if (s->n_token != 0) {
711 struct isl_token *tok = isl_stream_next_token(s);
712 isl_stream_error(s, tok, "unexpected token");
716 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
717 isl_hash_table_free(s->ctx, s->keywords);
719 isl_ctx_deref(s->ctx);