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;
79 void isl_token_free(struct isl_token *tok)
83 if (tok->type == ISL_TOKEN_VALUE)
84 isl_int_clear(tok->u.v);
85 else if (tok->type == ISL_TOKEN_IDENT || tok->type == ISL_TOKEN_STRING)
90 void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg)
92 int line = tok ? tok->line : s->line;
93 int col = tok ? tok->col : s->col;
94 fprintf(stderr, "syntax error (%d, %d): %s\n", line, col, msg);
97 fprintf(stderr, "got '%c'\n", tok->type);
98 else if (tok->type == ISL_TOKEN_IDENT)
99 fprintf(stderr, "got ident '%s'\n", tok->u.s);
101 fprintf(stderr, "got token type %d\n", tok->type);
105 static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
108 struct isl_stream *s = isl_alloc_type(ctx, struct isl_stream);
120 for (i = 0; i < 5; ++i)
125 s->buffer = isl_alloc_array(ctx, char, s->size);
134 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
136 struct isl_stream *s = isl_stream_new(ctx);
143 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
145 struct isl_stream *s = isl_stream_new(ctx);
152 static int isl_stream_getc(struct isl_stream *s)
177 static void isl_stream_ungetc(struct isl_stream *s, int c)
186 static int isl_stream_push_char(struct isl_stream *s, int c)
188 if (s->len >= s->size) {
189 s->size = (3*s->size)/2;
190 s->buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
194 s->buffer[s->len++] = c;
198 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
200 isl_assert(s->ctx, s->n_token < 5, return);
201 s->tokens[s->n_token++] = tok;
204 static enum isl_token_type check_keywords(struct isl_stream *s)
206 struct isl_hash_table_entry *entry;
207 struct isl_keyword *keyword;
210 if (!strcasecmp(s->buffer, "exists"))
211 return ISL_TOKEN_EXISTS;
212 if (!strcasecmp(s->buffer, "and"))
213 return ISL_TOKEN_AND;
214 if (!strcasecmp(s->buffer, "or"))
216 if (!strcasecmp(s->buffer, "infty"))
217 return ISL_TOKEN_INFTY;
218 if (!strcasecmp(s->buffer, "infinity"))
219 return ISL_TOKEN_INFTY;
220 if (!strcasecmp(s->buffer, "NaN"))
221 return ISL_TOKEN_NAN;
224 return ISL_TOKEN_IDENT;
226 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
227 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
230 keyword = entry->data;
231 return keyword->type;
234 return ISL_TOKEN_IDENT;
237 int isl_stream_skip_line(struct isl_stream *s)
241 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
245 return c == -1 ? -1 : 0;
248 static struct isl_token *next_token(struct isl_stream *s, int same_line)
251 struct isl_token *tok = NULL;
253 int old_line = s->line;
256 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
258 return s->tokens[--s->n_token];
261 if (same_line && s->c == '\n')
266 /* skip spaces and comment lines */
267 while ((c = isl_stream_getc(s)) != -1) {
269 if (isl_stream_skip_line(s) < 0)
274 } else if (!isspace(c) || (same_line && c == '\n'))
281 if (c == -1 || (same_line && c == '\n'))
299 tok = isl_token_new(s->ctx, line, col, old_line != line);
302 tok->type = (enum isl_token_type)c;
307 if ((c = isl_stream_getc(s)) == '>') {
308 tok = isl_token_new(s->ctx, line, col, old_line != line);
311 tok->type = ISL_TOKEN_TO;
315 isl_stream_ungetc(s, c);
317 tok = isl_token_new(s->ctx, line, col, old_line != line);
320 tok->type = (enum isl_token_type) '-';
324 if (c == '-' || isdigit(c)) {
325 tok = isl_token_new(s->ctx, line, col, old_line != line);
328 tok->type = ISL_TOKEN_VALUE;
329 isl_int_init(tok->u.v);
330 if (isl_stream_push_char(s, c))
332 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
333 if (isl_stream_push_char(s, c))
336 isl_stream_ungetc(s, c);
337 isl_stream_push_char(s, '\0');
338 isl_int_read(tok->u.v, s->buffer);
342 tok = isl_token_new(s->ctx, line, col, old_line != line);
345 isl_stream_push_char(s, c);
346 while ((c = isl_stream_getc(s)) != -1 &&
347 (isalnum(c) || c == '_'))
348 isl_stream_push_char(s, c);
350 isl_stream_ungetc(s, c);
351 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
352 isl_stream_push_char(s, c);
354 isl_stream_ungetc(s, c);
355 isl_stream_push_char(s, '\0');
356 tok->type = check_keywords(s);
357 if (tok->type == ISL_TOKEN_IDENT)
358 tok->u.s = strdup(s->buffer);
362 tok = isl_token_new(s->ctx, line, col, old_line != line);
365 tok->type = ISL_TOKEN_STRING;
367 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
368 isl_stream_push_char(s, c);
370 isl_stream_error(s, NULL, "unterminated string");
373 isl_stream_push_char(s, '\0');
374 tok->u.s = strdup(s->buffer);
379 tok = isl_token_new(s->ctx, line, col, old_line != line);
382 if ((c = isl_stream_getc(s)) == '=') {
383 tok->type = ISL_TOKEN_DEF;
387 isl_stream_ungetc(s, c);
388 tok->type = (enum isl_token_type) ':';
393 tok = isl_token_new(s->ctx, line, col, old_line != line);
396 if ((c = isl_stream_getc(s)) == '=') {
397 tok->type = ISL_TOKEN_GE;
399 } else if (c == '>') {
400 if ((c = isl_stream_getc(s)) == '=') {
401 tok->type = ISL_TOKEN_LEX_GE;
404 tok->type = ISL_TOKEN_LEX_GT;
406 tok->type = ISL_TOKEN_GT;
408 isl_stream_ungetc(s, c);
413 tok = isl_token_new(s->ctx, line, col, old_line != line);
416 if ((c = isl_stream_getc(s)) == '=') {
417 tok->type = ISL_TOKEN_LE;
419 } else if (c == '<') {
420 if ((c = isl_stream_getc(s)) == '=') {
421 tok->type = ISL_TOKEN_LEX_LE;
424 tok->type = ISL_TOKEN_LEX_LT;
426 tok->type = ISL_TOKEN_LT;
428 isl_stream_ungetc(s, c);
432 tok = isl_token_new(s->ctx, line, col, old_line != line);
435 tok->type = ISL_TOKEN_AND;
436 if ((c = isl_stream_getc(s)) != '&' && c != -1)
437 isl_stream_ungetc(s, c);
441 tok = isl_token_new(s->ctx, line, col, old_line != line);
444 tok->type = ISL_TOKEN_OR;
445 if ((c = isl_stream_getc(s)) != '|' && c != -1)
446 isl_stream_ungetc(s, c);
450 tok = isl_token_new(s->ctx, line, col, old_line != line);
453 tok->type = ISL_TOKEN_UNKNOWN;
460 struct isl_token *isl_stream_next_token(struct isl_stream *s)
462 return next_token(s, 0);
465 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
467 return next_token(s, 1);
470 int isl_stream_eat_if_available(struct isl_stream *s, int type)
472 struct isl_token *tok;
474 tok = isl_stream_next_token(s);
477 if (tok->type == type) {
481 isl_stream_push_token(s, tok);
485 int isl_stream_next_token_is(struct isl_stream *s, int type)
487 struct isl_token *tok;
490 tok = isl_stream_next_token(s);
493 r = tok->type == type;
494 isl_stream_push_token(s, tok);
498 char *isl_stream_read_ident_if_available(struct isl_stream *s)
500 struct isl_token *tok;
502 tok = isl_stream_next_token(s);
505 if (tok->type == ISL_TOKEN_IDENT) {
506 char *ident = strdup(tok->u.s);
510 isl_stream_push_token(s, tok);
514 int isl_stream_eat(struct isl_stream *s, int type)
516 struct isl_token *tok;
518 tok = isl_stream_next_token(s);
521 if (tok->type == type) {
525 isl_stream_error(s, tok, "expecting other token");
526 isl_stream_push_token(s, tok);
530 int isl_stream_is_empty(struct isl_stream *s)
532 struct isl_token *tok;
534 tok = isl_stream_next_token(s);
539 isl_stream_push_token(s, tok);
543 static int free_keyword(void **p, void *user)
545 struct isl_keyword *keyword = *p;
553 void isl_stream_flush_tokens(struct isl_stream *s)
559 for (i = 0; i < s->n_token; ++i)
560 isl_token_free(s->tokens[i]);
564 void isl_stream_free(struct isl_stream *s)
569 if (s->n_token != 0) {
570 struct isl_token *tok = isl_stream_next_token(s);
571 isl_stream_error(s, tok, "unexpected token");
575 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
576 isl_hash_table_free(s->ctx, s->keywords);
578 isl_ctx_deref(s->ctx);