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.h>
18 enum isl_token_type type;
21 static int same_name(const void *entry, const void *val)
23 const struct isl_keyword *keyword = (const struct isl_keyword *)entry;
25 return !strcmp(keyword->name, val);
28 enum isl_token_type isl_stream_register_keyword(struct isl_stream *s,
31 struct isl_hash_table_entry *entry;
32 struct isl_keyword *keyword;
36 s->keywords = isl_hash_table_alloc(s->ctx, 10);
38 return ISL_TOKEN_ERROR;
39 s->next_type = ISL_TOKEN_LAST;
42 name_hash = isl_hash_string(isl_hash_init(), name);
44 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash,
47 return ISL_TOKEN_ERROR;
49 keyword = entry->data;
53 keyword = isl_calloc_type(s->ctx, struct isl_keyword);
55 return ISL_TOKEN_ERROR;
56 keyword->type = s->next_type++;
57 keyword->name = strdup(name);
60 return ISL_TOKEN_ERROR;
62 entry->data = keyword;
67 static struct isl_token *isl_token_new(struct isl_ctx *ctx,
68 int line, int col, unsigned on_new_line)
70 struct isl_token *tok = isl_alloc_type(ctx, struct isl_token);
75 tok->on_new_line = on_new_line;
81 void isl_token_free(struct isl_token *tok)
85 if (tok->type == ISL_TOKEN_VALUE)
86 isl_int_clear(tok->u.v);
92 void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg)
94 int line = tok ? tok->line : s->line;
95 int col = tok ? tok->col : s->col;
96 fprintf(stderr, "syntax error (%d, %d): %s\n", line, col, msg);
99 fprintf(stderr, "got '%c'\n", tok->type);
100 else if (tok->type == ISL_TOKEN_IDENT)
101 fprintf(stderr, "got ident '%s'\n", tok->u.s);
102 else if (tok->is_keyword)
103 fprintf(stderr, "got keyword '%s'\n", tok->u.s);
104 else if (tok->type == ISL_TOKEN_VALUE) {
105 fprintf(stderr, "got value '");
106 isl_int_print(stderr, tok->u.v, 0);
107 fprintf(stderr, "'\n");
109 fprintf(stderr, "got token '%s'\n", tok->u.s);
111 fprintf(stderr, "got token type %d\n", tok->type);
115 static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
118 struct isl_stream *s = isl_alloc_type(ctx, struct isl_stream);
131 for (i = 0; i < 5; ++i)
136 s->buffer = isl_alloc_array(ctx, char, s->size);
145 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
147 struct isl_stream *s = isl_stream_new(ctx);
154 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
156 struct isl_stream *s = isl_stream_new(ctx);
163 static int stream_getc(struct isl_stream *s)
169 return s->c = s->un[--s->n_un];
190 static void isl_stream_ungetc(struct isl_stream *s, int c)
192 isl_assert(s->ctx, s->n_un < 5, return);
193 s->un[s->n_un++] = c;
197 static int isl_stream_getc(struct isl_stream *s)
208 isl_stream_ungetc(s, c);
213 static int isl_stream_push_char(struct isl_stream *s, int c)
215 if (s->len >= s->size) {
217 s->size = (3*s->size)/2;
218 buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
223 s->buffer[s->len++] = c;
227 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
229 isl_assert(s->ctx, s->n_token < 5, return);
230 s->tokens[s->n_token++] = tok;
233 static enum isl_token_type check_keywords(struct isl_stream *s)
235 struct isl_hash_table_entry *entry;
236 struct isl_keyword *keyword;
239 if (!strcasecmp(s->buffer, "exists"))
240 return ISL_TOKEN_EXISTS;
241 if (!strcasecmp(s->buffer, "and"))
242 return ISL_TOKEN_AND;
243 if (!strcasecmp(s->buffer, "or"))
245 if (!strcasecmp(s->buffer, "not"))
246 return ISL_TOKEN_NOT;
247 if (!strcasecmp(s->buffer, "infty"))
248 return ISL_TOKEN_INFTY;
249 if (!strcasecmp(s->buffer, "infinity"))
250 return ISL_TOKEN_INFTY;
251 if (!strcasecmp(s->buffer, "NaN"))
252 return ISL_TOKEN_NAN;
253 if (!strcasecmp(s->buffer, "min"))
254 return ISL_TOKEN_MIN;
255 if (!strcasecmp(s->buffer, "max"))
256 return ISL_TOKEN_MAX;
257 if (!strcasecmp(s->buffer, "rat"))
258 return ISL_TOKEN_RAT;
259 if (!strcasecmp(s->buffer, "true"))
260 return ISL_TOKEN_TRUE;
261 if (!strcasecmp(s->buffer, "false"))
262 return ISL_TOKEN_FALSE;
263 if (!strcasecmp(s->buffer, "ceild"))
264 return ISL_TOKEN_CEILD;
265 if (!strcasecmp(s->buffer, "floord"))
266 return ISL_TOKEN_FLOORD;
269 return ISL_TOKEN_IDENT;
271 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
272 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
275 keyword = entry->data;
276 return keyword->type;
279 return ISL_TOKEN_IDENT;
282 int isl_stream_skip_line(struct isl_stream *s)
286 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
290 return c == -1 ? -1 : 0;
293 static struct isl_token *next_token(struct isl_stream *s, int same_line)
296 struct isl_token *tok = NULL;
298 int old_line = s->line;
301 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
303 return s->tokens[--s->n_token];
306 if (same_line && s->c == '\n')
311 /* skip spaces and comment lines */
312 while ((c = isl_stream_getc(s)) != -1) {
314 if (isl_stream_skip_line(s) < 0)
319 } else if (!isspace(c) || (same_line && c == '\n'))
326 if (c == -1 || (same_line && c == '\n'))
344 tok = isl_token_new(s->ctx, line, col, old_line != line);
347 tok->type = (enum isl_token_type)c;
352 if ((c = isl_stream_getc(s)) == '>') {
353 tok = isl_token_new(s->ctx, line, col, old_line != line);
356 tok->u.s = strdup("->");
357 tok->type = ISL_TOKEN_TO;
361 isl_stream_ungetc(s, c);
363 tok = isl_token_new(s->ctx, line, col, old_line != line);
366 tok->type = (enum isl_token_type) '-';
370 if (c == '-' || isdigit(c)) {
371 tok = isl_token_new(s->ctx, line, col, old_line != line);
374 tok->type = ISL_TOKEN_VALUE;
375 isl_int_init(tok->u.v);
376 if (isl_stream_push_char(s, c))
378 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
379 if (isl_stream_push_char(s, c))
382 isl_stream_ungetc(s, c);
383 isl_stream_push_char(s, '\0');
384 isl_int_read(tok->u.v, s->buffer);
387 if (isalpha(c) || c == '_') {
388 tok = isl_token_new(s->ctx, line, col, old_line != line);
391 isl_stream_push_char(s, c);
392 while ((c = isl_stream_getc(s)) != -1 &&
393 (isalnum(c) || c == '_'))
394 isl_stream_push_char(s, c);
396 isl_stream_ungetc(s, c);
397 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
398 isl_stream_push_char(s, c);
400 isl_stream_ungetc(s, c);
401 isl_stream_push_char(s, '\0');
402 tok->type = check_keywords(s);
403 if (tok->type != ISL_TOKEN_IDENT)
405 tok->u.s = strdup(s->buffer);
411 tok = isl_token_new(s->ctx, line, col, old_line != line);
414 tok->type = ISL_TOKEN_STRING;
416 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
417 isl_stream_push_char(s, c);
419 isl_stream_error(s, NULL, "unterminated string");
422 isl_stream_push_char(s, '\0');
423 tok->u.s = strdup(s->buffer);
428 tok = isl_token_new(s->ctx, line, col, old_line != line);
431 if ((c = isl_stream_getc(s)) == '=') {
432 tok->u.s = strdup(":=");
433 tok->type = ISL_TOKEN_DEF;
437 isl_stream_ungetc(s, c);
438 tok->type = (enum isl_token_type) ':';
443 tok = isl_token_new(s->ctx, line, col, old_line != line);
446 if ((c = isl_stream_getc(s)) == '=') {
447 tok->u.s = strdup(">=");
448 tok->type = ISL_TOKEN_GE;
450 } else if (c == '>') {
451 if ((c = isl_stream_getc(s)) == '=') {
452 tok->u.s = strdup(">>=");
453 tok->type = ISL_TOKEN_LEX_GE;
456 tok->u.s = strdup(">>");
457 tok->type = ISL_TOKEN_LEX_GT;
459 tok->u.s = strdup(">");
460 tok->type = ISL_TOKEN_GT;
463 isl_stream_ungetc(s, c);
468 tok = isl_token_new(s->ctx, line, col, old_line != line);
471 if ((c = isl_stream_getc(s)) == '=') {
472 tok->u.s = strdup("<=");
473 tok->type = ISL_TOKEN_LE;
475 } else if (c == '<') {
476 if ((c = isl_stream_getc(s)) == '=') {
477 tok->u.s = strdup("<<=");
478 tok->type = ISL_TOKEN_LEX_LE;
481 tok->u.s = strdup("<<");
482 tok->type = ISL_TOKEN_LEX_LT;
484 tok->u.s = strdup("<");
485 tok->type = ISL_TOKEN_LT;
488 isl_stream_ungetc(s, c);
492 tok = isl_token_new(s->ctx, line, col, old_line != line);
495 tok->type = ISL_TOKEN_AND;
496 if ((c = isl_stream_getc(s)) != '&' && c != -1) {
497 tok->u.s = strdup("&");
498 isl_stream_ungetc(s, c);
500 tok->u.s = strdup("&&");
504 tok = isl_token_new(s->ctx, line, col, old_line != line);
507 tok->type = ISL_TOKEN_OR;
508 if ((c = isl_stream_getc(s)) != '|' && c != -1) {
509 tok->u.s = strdup("|");
510 isl_stream_ungetc(s, c);
512 tok->u.s = strdup("||");
516 tok = isl_token_new(s->ctx, line, col, old_line != line);
519 if ((c = isl_stream_getc(s)) != '\\' && c != -1) {
520 tok->type = (enum isl_token_type) '/';
521 isl_stream_ungetc(s, c);
523 tok->u.s = strdup("/\\");
524 tok->type = ISL_TOKEN_AND;
529 tok = isl_token_new(s->ctx, line, col, old_line != line);
532 if ((c = isl_stream_getc(s)) != '/' && c != -1) {
533 tok->type = (enum isl_token_type) '\\';
534 isl_stream_ungetc(s, c);
536 tok->u.s = strdup("\\/");
537 tok->type = ISL_TOKEN_OR;
542 tok = isl_token_new(s->ctx, line, col, old_line != line);
545 tok->type = ISL_TOKEN_NOT;
546 tok->u.s = strdup("!");
550 tok = isl_token_new(s->ctx, line, col, old_line != line);
553 tok->type = ISL_TOKEN_UNKNOWN;
560 struct isl_token *isl_stream_next_token(struct isl_stream *s)
562 return next_token(s, 0);
565 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
567 return next_token(s, 1);
570 int isl_stream_eat_if_available(struct isl_stream *s, int type)
572 struct isl_token *tok;
574 tok = isl_stream_next_token(s);
577 if (tok->type == type) {
581 isl_stream_push_token(s, tok);
585 int isl_stream_next_token_is(struct isl_stream *s, int type)
587 struct isl_token *tok;
590 tok = isl_stream_next_token(s);
593 r = tok->type == type;
594 isl_stream_push_token(s, tok);
598 char *isl_stream_read_ident_if_available(struct isl_stream *s)
600 struct isl_token *tok;
602 tok = isl_stream_next_token(s);
605 if (tok->type == ISL_TOKEN_IDENT) {
606 char *ident = strdup(tok->u.s);
610 isl_stream_push_token(s, tok);
614 int isl_stream_eat(struct isl_stream *s, int type)
616 struct isl_token *tok;
618 tok = isl_stream_next_token(s);
621 if (tok->type == type) {
625 isl_stream_error(s, tok, "expecting other token");
626 isl_stream_push_token(s, tok);
630 int isl_stream_is_empty(struct isl_stream *s)
632 struct isl_token *tok;
634 tok = isl_stream_next_token(s);
639 isl_stream_push_token(s, tok);
643 static int free_keyword(void **p, void *user)
645 struct isl_keyword *keyword = *p;
653 void isl_stream_flush_tokens(struct isl_stream *s)
659 for (i = 0; i < s->n_token; ++i)
660 isl_token_free(s->tokens[i]);
664 void isl_stream_free(struct isl_stream *s)
669 if (s->n_token != 0) {
670 struct isl_token *tok = isl_stream_next_token(s);
671 isl_stream_error(s, tok, "unexpected token");
675 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
676 isl_hash_table_free(s->ctx, s->keywords);
678 isl_ctx_deref(s->ctx);