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;
222 if (!strcasecmp(s->buffer, "max"))
223 return ISL_TOKEN_MAX;
226 return ISL_TOKEN_IDENT;
228 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
229 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
232 keyword = entry->data;
233 return keyword->type;
236 return ISL_TOKEN_IDENT;
239 int isl_stream_skip_line(struct isl_stream *s)
243 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
247 return c == -1 ? -1 : 0;
250 static struct isl_token *next_token(struct isl_stream *s, int same_line)
253 struct isl_token *tok = NULL;
255 int old_line = s->line;
258 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
260 return s->tokens[--s->n_token];
263 if (same_line && s->c == '\n')
268 /* skip spaces and comment lines */
269 while ((c = isl_stream_getc(s)) != -1) {
271 if (isl_stream_skip_line(s) < 0)
276 } else if (!isspace(c) || (same_line && c == '\n'))
283 if (c == -1 || (same_line && c == '\n'))
301 tok = isl_token_new(s->ctx, line, col, old_line != line);
304 tok->type = (enum isl_token_type)c;
309 if ((c = isl_stream_getc(s)) == '>') {
310 tok = isl_token_new(s->ctx, line, col, old_line != line);
313 tok->type = ISL_TOKEN_TO;
317 isl_stream_ungetc(s, c);
319 tok = isl_token_new(s->ctx, line, col, old_line != line);
322 tok->type = (enum isl_token_type) '-';
326 if (c == '-' || isdigit(c)) {
327 tok = isl_token_new(s->ctx, line, col, old_line != line);
330 tok->type = ISL_TOKEN_VALUE;
331 isl_int_init(tok->u.v);
332 if (isl_stream_push_char(s, c))
334 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
335 if (isl_stream_push_char(s, c))
338 isl_stream_ungetc(s, c);
339 isl_stream_push_char(s, '\0');
340 isl_int_read(tok->u.v, s->buffer);
343 if (isalpha(c) || c == '_') {
344 tok = isl_token_new(s->ctx, line, col, old_line != line);
347 isl_stream_push_char(s, c);
348 while ((c = isl_stream_getc(s)) != -1 &&
349 (isalnum(c) || c == '_'))
350 isl_stream_push_char(s, c);
352 isl_stream_ungetc(s, c);
353 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
354 isl_stream_push_char(s, c);
356 isl_stream_ungetc(s, c);
357 isl_stream_push_char(s, '\0');
358 tok->type = check_keywords(s);
359 if (tok->type == ISL_TOKEN_IDENT)
360 tok->u.s = strdup(s->buffer);
364 tok = isl_token_new(s->ctx, line, col, old_line != line);
367 tok->type = ISL_TOKEN_STRING;
369 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
370 isl_stream_push_char(s, c);
372 isl_stream_error(s, NULL, "unterminated string");
375 isl_stream_push_char(s, '\0');
376 tok->u.s = strdup(s->buffer);
381 tok = isl_token_new(s->ctx, line, col, old_line != line);
384 if ((c = isl_stream_getc(s)) == '=') {
385 tok->type = ISL_TOKEN_DEF;
389 isl_stream_ungetc(s, c);
390 tok->type = (enum isl_token_type) ':';
395 tok = isl_token_new(s->ctx, line, col, old_line != line);
398 if ((c = isl_stream_getc(s)) == '=') {
399 tok->type = ISL_TOKEN_GE;
401 } else if (c == '>') {
402 if ((c = isl_stream_getc(s)) == '=') {
403 tok->type = ISL_TOKEN_LEX_GE;
406 tok->type = ISL_TOKEN_LEX_GT;
408 tok->type = ISL_TOKEN_GT;
410 isl_stream_ungetc(s, c);
415 tok = isl_token_new(s->ctx, line, col, old_line != line);
418 if ((c = isl_stream_getc(s)) == '=') {
419 tok->type = ISL_TOKEN_LE;
421 } else if (c == '<') {
422 if ((c = isl_stream_getc(s)) == '=') {
423 tok->type = ISL_TOKEN_LEX_LE;
426 tok->type = ISL_TOKEN_LEX_LT;
428 tok->type = ISL_TOKEN_LT;
430 isl_stream_ungetc(s, c);
434 tok = isl_token_new(s->ctx, line, col, old_line != line);
437 tok->type = ISL_TOKEN_AND;
438 if ((c = isl_stream_getc(s)) != '&' && c != -1)
439 isl_stream_ungetc(s, c);
443 tok = isl_token_new(s->ctx, line, col, old_line != line);
446 tok->type = ISL_TOKEN_OR;
447 if ((c = isl_stream_getc(s)) != '|' && c != -1)
448 isl_stream_ungetc(s, c);
452 tok = isl_token_new(s->ctx, line, col, old_line != line);
455 tok->type = ISL_TOKEN_UNKNOWN;
462 struct isl_token *isl_stream_next_token(struct isl_stream *s)
464 return next_token(s, 0);
467 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
469 return next_token(s, 1);
472 int isl_stream_eat_if_available(struct isl_stream *s, int type)
474 struct isl_token *tok;
476 tok = isl_stream_next_token(s);
479 if (tok->type == type) {
483 isl_stream_push_token(s, tok);
487 int isl_stream_next_token_is(struct isl_stream *s, int type)
489 struct isl_token *tok;
492 tok = isl_stream_next_token(s);
495 r = tok->type == type;
496 isl_stream_push_token(s, tok);
500 char *isl_stream_read_ident_if_available(struct isl_stream *s)
502 struct isl_token *tok;
504 tok = isl_stream_next_token(s);
507 if (tok->type == ISL_TOKEN_IDENT) {
508 char *ident = strdup(tok->u.s);
512 isl_stream_push_token(s, tok);
516 int isl_stream_eat(struct isl_stream *s, int type)
518 struct isl_token *tok;
520 tok = isl_stream_next_token(s);
523 if (tok->type == type) {
527 isl_stream_error(s, tok, "expecting other token");
528 isl_stream_push_token(s, tok);
532 int isl_stream_is_empty(struct isl_stream *s)
534 struct isl_token *tok;
536 tok = isl_stream_next_token(s);
541 isl_stream_push_token(s, tok);
545 static int free_keyword(void **p, void *user)
547 struct isl_keyword *keyword = *p;
555 void isl_stream_flush_tokens(struct isl_stream *s)
561 for (i = 0; i < s->n_token; ++i)
562 isl_token_free(s->tokens[i]);
566 void isl_stream_free(struct isl_stream *s)
571 if (s->n_token != 0) {
572 struct isl_token *tok = isl_stream_next_token(s);
573 isl_stream_error(s, tok, "unexpected token");
577 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
578 isl_hash_table_free(s->ctx, s->keywords);
580 isl_ctx_deref(s->ctx);