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) {
216 s->size = (3*s->size)/2;
217 s->buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
221 s->buffer[s->len++] = c;
225 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
227 isl_assert(s->ctx, s->n_token < 5, return);
228 s->tokens[s->n_token++] = tok;
231 static enum isl_token_type check_keywords(struct isl_stream *s)
233 struct isl_hash_table_entry *entry;
234 struct isl_keyword *keyword;
237 if (!strcasecmp(s->buffer, "exists"))
238 return ISL_TOKEN_EXISTS;
239 if (!strcasecmp(s->buffer, "and"))
240 return ISL_TOKEN_AND;
241 if (!strcasecmp(s->buffer, "or"))
243 if (!strcasecmp(s->buffer, "not"))
244 return ISL_TOKEN_NOT;
245 if (!strcasecmp(s->buffer, "infty"))
246 return ISL_TOKEN_INFTY;
247 if (!strcasecmp(s->buffer, "infinity"))
248 return ISL_TOKEN_INFTY;
249 if (!strcasecmp(s->buffer, "NaN"))
250 return ISL_TOKEN_NAN;
251 if (!strcasecmp(s->buffer, "max"))
252 return ISL_TOKEN_MAX;
253 if (!strcasecmp(s->buffer, "rat"))
254 return ISL_TOKEN_RAT;
255 if (!strcasecmp(s->buffer, "true"))
256 return ISL_TOKEN_TRUE;
257 if (!strcasecmp(s->buffer, "false"))
258 return ISL_TOKEN_FALSE;
261 return ISL_TOKEN_IDENT;
263 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
264 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
267 keyword = entry->data;
268 return keyword->type;
271 return ISL_TOKEN_IDENT;
274 int isl_stream_skip_line(struct isl_stream *s)
278 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
282 return c == -1 ? -1 : 0;
285 static struct isl_token *next_token(struct isl_stream *s, int same_line)
288 struct isl_token *tok = NULL;
290 int old_line = s->line;
293 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
295 return s->tokens[--s->n_token];
298 if (same_line && s->c == '\n')
303 /* skip spaces and comment lines */
304 while ((c = isl_stream_getc(s)) != -1) {
306 if (isl_stream_skip_line(s) < 0)
311 } else if (!isspace(c) || (same_line && c == '\n'))
318 if (c == -1 || (same_line && c == '\n'))
336 tok = isl_token_new(s->ctx, line, col, old_line != line);
339 tok->type = (enum isl_token_type)c;
344 if ((c = isl_stream_getc(s)) == '>') {
345 tok = isl_token_new(s->ctx, line, col, old_line != line);
348 tok->u.s = strdup("->");
349 tok->type = ISL_TOKEN_TO;
353 isl_stream_ungetc(s, c);
355 tok = isl_token_new(s->ctx, line, col, old_line != line);
358 tok->type = (enum isl_token_type) '-';
362 if (c == '-' || isdigit(c)) {
363 tok = isl_token_new(s->ctx, line, col, old_line != line);
366 tok->type = ISL_TOKEN_VALUE;
367 isl_int_init(tok->u.v);
368 if (isl_stream_push_char(s, c))
370 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
371 if (isl_stream_push_char(s, c))
374 isl_stream_ungetc(s, c);
375 isl_stream_push_char(s, '\0');
376 isl_int_read(tok->u.v, s->buffer);
379 if (isalpha(c) || c == '_') {
380 tok = isl_token_new(s->ctx, line, col, old_line != line);
383 isl_stream_push_char(s, c);
384 while ((c = isl_stream_getc(s)) != -1 &&
385 (isalnum(c) || c == '_'))
386 isl_stream_push_char(s, c);
388 isl_stream_ungetc(s, c);
389 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
390 isl_stream_push_char(s, c);
392 isl_stream_ungetc(s, c);
393 isl_stream_push_char(s, '\0');
394 tok->type = check_keywords(s);
395 if (tok->type != ISL_TOKEN_IDENT)
397 tok->u.s = strdup(s->buffer);
403 tok = isl_token_new(s->ctx, line, col, old_line != line);
406 tok->type = ISL_TOKEN_STRING;
408 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
409 isl_stream_push_char(s, c);
411 isl_stream_error(s, NULL, "unterminated string");
414 isl_stream_push_char(s, '\0');
415 tok->u.s = strdup(s->buffer);
420 tok = isl_token_new(s->ctx, line, col, old_line != line);
423 if ((c = isl_stream_getc(s)) == '=') {
424 tok->u.s = strdup(":=");
425 tok->type = ISL_TOKEN_DEF;
429 isl_stream_ungetc(s, c);
430 tok->type = (enum isl_token_type) ':';
435 tok = isl_token_new(s->ctx, line, col, old_line != line);
438 if ((c = isl_stream_getc(s)) == '=') {
439 tok->u.s = strdup(">=");
440 tok->type = ISL_TOKEN_GE;
442 } else if (c == '>') {
443 if ((c = isl_stream_getc(s)) == '=') {
444 tok->u.s = strdup(">>=");
445 tok->type = ISL_TOKEN_LEX_GE;
448 tok->u.s = strdup(">>");
449 tok->type = ISL_TOKEN_LEX_GT;
451 tok->u.s = strdup(">");
452 tok->type = ISL_TOKEN_GT;
455 isl_stream_ungetc(s, c);
460 tok = isl_token_new(s->ctx, line, col, old_line != line);
463 if ((c = isl_stream_getc(s)) == '=') {
464 tok->u.s = strdup("<=");
465 tok->type = ISL_TOKEN_LE;
467 } else if (c == '<') {
468 if ((c = isl_stream_getc(s)) == '=') {
469 tok->u.s = strdup("<<=");
470 tok->type = ISL_TOKEN_LEX_LE;
473 tok->u.s = strdup("<<");
474 tok->type = ISL_TOKEN_LEX_LT;
476 tok->u.s = strdup("<");
477 tok->type = ISL_TOKEN_LT;
480 isl_stream_ungetc(s, c);
484 tok = isl_token_new(s->ctx, line, col, old_line != line);
487 tok->type = ISL_TOKEN_AND;
488 if ((c = isl_stream_getc(s)) != '&' && c != -1) {
489 tok->u.s = strdup("&");
490 isl_stream_ungetc(s, c);
492 tok->u.s = strdup("&&");
496 tok = isl_token_new(s->ctx, line, col, old_line != line);
499 tok->type = ISL_TOKEN_OR;
500 if ((c = isl_stream_getc(s)) != '|' && c != -1) {
501 tok->u.s = strdup("|");
502 isl_stream_ungetc(s, c);
504 tok->u.s = strdup("||");
508 tok = isl_token_new(s->ctx, line, col, old_line != line);
511 if ((c = isl_stream_getc(s)) != '\\' && c != -1) {
512 tok->type = (enum isl_token_type) '/';
513 isl_stream_ungetc(s, c);
515 tok->u.s = strdup("/\\");
516 tok->type = ISL_TOKEN_AND;
521 tok = isl_token_new(s->ctx, line, col, old_line != line);
524 if ((c = isl_stream_getc(s)) != '/' && c != -1) {
525 tok->type = (enum isl_token_type) '\\';
526 isl_stream_ungetc(s, c);
528 tok->u.s = strdup("\\/");
529 tok->type = ISL_TOKEN_OR;
534 tok = isl_token_new(s->ctx, line, col, old_line != line);
537 tok->type = ISL_TOKEN_NOT;
538 tok->u.s = strdup("!");
542 tok = isl_token_new(s->ctx, line, col, old_line != line);
545 tok->type = ISL_TOKEN_UNKNOWN;
552 struct isl_token *isl_stream_next_token(struct isl_stream *s)
554 return next_token(s, 0);
557 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
559 return next_token(s, 1);
562 int isl_stream_eat_if_available(struct isl_stream *s, int type)
564 struct isl_token *tok;
566 tok = isl_stream_next_token(s);
569 if (tok->type == type) {
573 isl_stream_push_token(s, tok);
577 int isl_stream_next_token_is(struct isl_stream *s, int type)
579 struct isl_token *tok;
582 tok = isl_stream_next_token(s);
585 r = tok->type == type;
586 isl_stream_push_token(s, tok);
590 char *isl_stream_read_ident_if_available(struct isl_stream *s)
592 struct isl_token *tok;
594 tok = isl_stream_next_token(s);
597 if (tok->type == ISL_TOKEN_IDENT) {
598 char *ident = strdup(tok->u.s);
602 isl_stream_push_token(s, tok);
606 int isl_stream_eat(struct isl_stream *s, int type)
608 struct isl_token *tok;
610 tok = isl_stream_next_token(s);
613 if (tok->type == type) {
617 isl_stream_error(s, tok, "expecting other token");
618 isl_stream_push_token(s, tok);
622 int isl_stream_is_empty(struct isl_stream *s)
624 struct isl_token *tok;
626 tok = isl_stream_next_token(s);
631 isl_stream_push_token(s, tok);
635 static int free_keyword(void **p, void *user)
637 struct isl_keyword *keyword = *p;
645 void isl_stream_flush_tokens(struct isl_stream *s)
651 for (i = 0; i < s->n_token; ++i)
652 isl_token_free(s->tokens[i]);
656 void isl_stream_free(struct isl_stream *s)
661 if (s->n_token != 0) {
662 struct isl_token *tok = isl_stream_next_token(s);
663 isl_stream_error(s, tok, "unexpected token");
667 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
668 isl_hash_table_free(s->ctx, s->keywords);
670 isl_ctx_deref(s->ctx);