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)
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);
99 fprintf(stderr, "got token type %d\n", tok->type);
103 static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
106 struct isl_stream *s = isl_alloc_type(ctx, struct isl_stream);
114 s->buffer = isl_alloc_array(ctx, char, s->size);
122 for (i = 0; i < 5; ++i)
132 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
134 struct isl_stream *s = isl_stream_new(ctx);
141 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
143 struct isl_stream *s = isl_stream_new(ctx);
148 static int isl_stream_getc(struct isl_stream *s)
173 static void isl_stream_ungetc(struct isl_stream *s, int c)
182 static int isl_stream_push_char(struct isl_stream *s, int c)
184 if (s->len >= s->size) {
185 s->size = (3*s->size)/2;
186 s->buffer = isl_realloc_array(ctx, s->buffer, char, s->size);
190 s->buffer[s->len++] = c;
194 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
196 isl_assert(s->ctx, s->n_token < 5, return);
197 s->tokens[s->n_token++] = tok;
200 static enum isl_token_type check_keywords(struct isl_stream *s)
202 struct isl_hash_table_entry *entry;
203 struct isl_keyword *keyword;
206 if (!strcasecmp(s->buffer, "exists"))
207 return ISL_TOKEN_EXISTS;
208 if (!strcasecmp(s->buffer, "and"))
209 return ISL_TOKEN_AND;
210 if (!strcasecmp(s->buffer, "or"))
212 if (!strcasecmp(s->buffer, "infty"))
213 return ISL_TOKEN_INFTY;
214 if (!strcasecmp(s->buffer, "infinity"))
215 return ISL_TOKEN_INFTY;
218 return ISL_TOKEN_IDENT;
220 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
221 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
224 keyword = entry->data;
225 return keyword->type;
228 return ISL_TOKEN_IDENT;
231 static struct isl_token *next_token(struct isl_stream *s, int same_line)
234 struct isl_token *tok = NULL;
236 int old_line = s->line;
239 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
241 return s->tokens[--s->n_token];
244 if (same_line && s->c == '\n')
249 /* skip spaces and comment lines */
250 while ((c = isl_stream_getc(s)) != -1) {
252 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
255 if (c == -1 || (same_line && c == '\n'))
257 } else if (!isspace(c) || (same_line && c == '\n'))
264 if (c == -1 || (same_line && c == '\n'))
279 tok = isl_token_new(s->ctx, line, col, old_line != line);
282 tok->type = (enum isl_token_type)c;
287 if ((c = isl_stream_getc(s)) == '>') {
288 tok = isl_token_new(s->ctx, line, col, old_line != line);
291 tok->type = ISL_TOKEN_TO;
295 isl_stream_ungetc(s, c);
297 tok = isl_token_new(s->ctx, line, col, old_line != line);
300 tok->type = (enum isl_token_type) '-';
304 if (c == '-' || isdigit(c)) {
305 tok = isl_token_new(s->ctx, line, col, old_line != line);
308 tok->type = ISL_TOKEN_VALUE;
309 isl_int_init(tok->u.v);
310 if (isl_stream_push_char(s, c))
312 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
313 if (isl_stream_push_char(s, c))
316 isl_stream_ungetc(s, c);
317 isl_stream_push_char(s, '\0');
318 isl_int_read(tok->u.v, s->buffer);
322 tok = isl_token_new(s->ctx, line, col, old_line != line);
325 isl_stream_push_char(s, c);
326 while ((c = isl_stream_getc(s)) != -1 && isalnum(c))
327 isl_stream_push_char(s, c);
329 isl_stream_ungetc(s, c);
330 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
331 isl_stream_push_char(s, c);
333 isl_stream_ungetc(s, c);
334 isl_stream_push_char(s, '\0');
335 tok->type = check_keywords(s);
336 if (tok->type == ISL_TOKEN_IDENT)
337 tok->u.s = strdup(s->buffer);
342 tok = isl_token_new(s->ctx, line, col, old_line != line);
345 if ((c = isl_stream_getc(s)) == '=') {
346 tok->type = ISL_TOKEN_DEF;
350 isl_stream_ungetc(s, c);
356 tok = isl_token_new(s->ctx, line, col, old_line != line);
359 if ((c = isl_stream_getc(s)) == '=') {
360 tok->type = ISL_TOKEN_GE;
364 isl_stream_ungetc(s, c);
365 tok->type = ISL_TOKEN_GT;
370 tok = isl_token_new(s->ctx, line, col, old_line != line);
373 if ((c = isl_stream_getc(s)) == '=') {
374 tok->type = ISL_TOKEN_LE;
378 isl_stream_ungetc(s, c);
379 tok->type = ISL_TOKEN_LT;
383 tok = isl_token_new(s->ctx, line, col, old_line != line);
386 tok->type = ISL_TOKEN_AND;
387 if ((c = isl_stream_getc(s)) != '&' && c != -1)
388 isl_stream_ungetc(s, c);
392 tok = isl_token_new(s->ctx, line, col, old_line != line);
395 tok->type = ISL_TOKEN_OR;
396 if ((c = isl_stream_getc(s)) != '|' && c != -1)
397 isl_stream_ungetc(s, c);
401 tok = isl_token_new(s->ctx, line, col, old_line != line);
404 tok->type = ISL_TOKEN_UNKNOWN;
411 struct isl_token *isl_stream_next_token(struct isl_stream *s)
413 return next_token(s, 0);
416 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
418 return next_token(s, 1);
421 int isl_stream_eat_if_available(struct isl_stream *s, int type)
423 struct isl_token *tok;
425 tok = isl_stream_next_token(s);
428 if (tok->type == type) {
432 isl_stream_push_token(s, tok);
436 int isl_stream_next_token_is(struct isl_stream *s, int type)
438 struct isl_token *tok;
441 tok = isl_stream_next_token(s);
444 r = tok->type == type;
445 isl_stream_push_token(s, tok);
449 char *isl_stream_read_ident_if_available(struct isl_stream *s)
451 struct isl_token *tok;
453 tok = isl_stream_next_token(s);
456 if (tok->type == ISL_TOKEN_IDENT) {
457 char *ident = strdup(tok->u.s);
461 isl_stream_push_token(s, tok);
465 int isl_stream_eat(struct isl_stream *s, int type)
467 struct isl_token *tok;
469 tok = isl_stream_next_token(s);
472 if (tok->type == type) {
476 isl_stream_error(s, tok, "expecting other token");
477 isl_stream_push_token(s, tok);
481 int isl_stream_is_empty(struct isl_stream *s)
483 struct isl_token *tok;
485 tok = isl_stream_next_token(s);
490 isl_stream_push_token(s, tok);
494 static int free_keyword(void *p)
496 struct isl_keyword *keyword = p;
504 void isl_stream_free(struct isl_stream *s)
509 if (s->n_token != 0) {
510 struct isl_token *tok = isl_stream_next_token(s);
511 isl_stream_error(s, tok, "unexpected token");
515 isl_hash_table_foreach(s->ctx, s->keywords, free_keyword);
516 isl_hash_table_free(s->ctx, s->keywords);
518 isl_ctx_deref(s->ctx);