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);
130 for (i = 0; i < 5; ++i)
135 s->buffer = isl_alloc_array(ctx, char, s->size);
144 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
146 struct isl_stream *s = isl_stream_new(ctx);
153 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
155 struct isl_stream *s = isl_stream_new(ctx);
162 static int isl_stream_getc(struct isl_stream *s)
187 static void isl_stream_ungetc(struct isl_stream *s, int c)
196 static int isl_stream_push_char(struct isl_stream *s, int c)
198 if (s->len >= s->size) {
199 s->size = (3*s->size)/2;
200 s->buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
204 s->buffer[s->len++] = c;
208 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
210 isl_assert(s->ctx, s->n_token < 5, return);
211 s->tokens[s->n_token++] = tok;
214 static enum isl_token_type check_keywords(struct isl_stream *s)
216 struct isl_hash_table_entry *entry;
217 struct isl_keyword *keyword;
220 if (!strcasecmp(s->buffer, "exists"))
221 return ISL_TOKEN_EXISTS;
222 if (!strcasecmp(s->buffer, "and"))
223 return ISL_TOKEN_AND;
224 if (!strcasecmp(s->buffer, "or"))
226 if (!strcasecmp(s->buffer, "infty"))
227 return ISL_TOKEN_INFTY;
228 if (!strcasecmp(s->buffer, "infinity"))
229 return ISL_TOKEN_INFTY;
230 if (!strcasecmp(s->buffer, "NaN"))
231 return ISL_TOKEN_NAN;
232 if (!strcasecmp(s->buffer, "max"))
233 return ISL_TOKEN_MAX;
236 return ISL_TOKEN_IDENT;
238 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
239 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
242 keyword = entry->data;
243 return keyword->type;
246 return ISL_TOKEN_IDENT;
249 int isl_stream_skip_line(struct isl_stream *s)
253 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
257 return c == -1 ? -1 : 0;
260 static struct isl_token *next_token(struct isl_stream *s, int same_line)
263 struct isl_token *tok = NULL;
265 int old_line = s->line;
268 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
270 return s->tokens[--s->n_token];
273 if (same_line && s->c == '\n')
278 /* skip spaces and comment lines */
279 while ((c = isl_stream_getc(s)) != -1) {
281 if (isl_stream_skip_line(s) < 0)
286 } else if (!isspace(c) || (same_line && c == '\n'))
293 if (c == -1 || (same_line && c == '\n'))
311 tok = isl_token_new(s->ctx, line, col, old_line != line);
314 tok->type = (enum isl_token_type)c;
319 if ((c = isl_stream_getc(s)) == '>') {
320 tok = isl_token_new(s->ctx, line, col, old_line != line);
323 tok->u.s = strdup("->");
324 tok->type = ISL_TOKEN_TO;
328 isl_stream_ungetc(s, c);
330 tok = isl_token_new(s->ctx, line, col, old_line != line);
333 tok->type = (enum isl_token_type) '-';
337 if (c == '-' || isdigit(c)) {
338 tok = isl_token_new(s->ctx, line, col, old_line != line);
341 tok->type = ISL_TOKEN_VALUE;
342 isl_int_init(tok->u.v);
343 if (isl_stream_push_char(s, c))
345 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
346 if (isl_stream_push_char(s, c))
349 isl_stream_ungetc(s, c);
350 isl_stream_push_char(s, '\0');
351 isl_int_read(tok->u.v, s->buffer);
354 if (isalpha(c) || c == '_') {
355 tok = isl_token_new(s->ctx, line, col, old_line != line);
358 isl_stream_push_char(s, c);
359 while ((c = isl_stream_getc(s)) != -1 &&
360 (isalnum(c) || c == '_'))
361 isl_stream_push_char(s, c);
363 isl_stream_ungetc(s, c);
364 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
365 isl_stream_push_char(s, c);
367 isl_stream_ungetc(s, c);
368 isl_stream_push_char(s, '\0');
369 tok->type = check_keywords(s);
370 if (tok->type != ISL_TOKEN_IDENT)
372 tok->u.s = strdup(s->buffer);
378 tok = isl_token_new(s->ctx, line, col, old_line != line);
381 tok->type = ISL_TOKEN_STRING;
383 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
384 isl_stream_push_char(s, c);
386 isl_stream_error(s, NULL, "unterminated string");
389 isl_stream_push_char(s, '\0');
390 tok->u.s = strdup(s->buffer);
395 tok = isl_token_new(s->ctx, line, col, old_line != line);
398 if ((c = isl_stream_getc(s)) == '=') {
399 tok->u.s = strdup(":=");
400 tok->type = ISL_TOKEN_DEF;
404 isl_stream_ungetc(s, c);
405 tok->type = (enum isl_token_type) ':';
410 tok = isl_token_new(s->ctx, line, col, old_line != line);
413 if ((c = isl_stream_getc(s)) == '=') {
414 tok->u.s = strdup(">=");
415 tok->type = ISL_TOKEN_GE;
417 } else if (c == '>') {
418 if ((c = isl_stream_getc(s)) == '=') {
419 tok->u.s = strdup(">>=");
420 tok->type = ISL_TOKEN_LEX_GE;
423 tok->u.s = strdup(">>");
424 tok->type = ISL_TOKEN_LEX_GT;
426 tok->u.s = strdup(">");
427 tok->type = ISL_TOKEN_GT;
430 isl_stream_ungetc(s, c);
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_LE;
442 } else if (c == '<') {
443 if ((c = isl_stream_getc(s)) == '=') {
444 tok->u.s = strdup("<<=");
445 tok->type = ISL_TOKEN_LEX_LE;
448 tok->u.s = strdup("<<");
449 tok->type = ISL_TOKEN_LEX_LT;
451 tok->u.s = strdup("<");
452 tok->type = ISL_TOKEN_LT;
455 isl_stream_ungetc(s, c);
459 tok = isl_token_new(s->ctx, line, col, old_line != line);
462 tok->type = ISL_TOKEN_AND;
463 if ((c = isl_stream_getc(s)) != '&' && c != -1) {
464 tok->u.s = strdup("&");
465 isl_stream_ungetc(s, c);
467 tok->u.s = strdup("&&");
471 tok = isl_token_new(s->ctx, line, col, old_line != line);
474 tok->type = ISL_TOKEN_OR;
475 if ((c = isl_stream_getc(s)) != '|' && c != -1) {
476 tok->u.s = strdup("|");
477 isl_stream_ungetc(s, c);
479 tok->u.s = strdup("||");
483 tok = isl_token_new(s->ctx, line, col, old_line != line);
486 tok->type = ISL_TOKEN_UNKNOWN;
493 struct isl_token *isl_stream_next_token(struct isl_stream *s)
495 return next_token(s, 0);
498 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
500 return next_token(s, 1);
503 int isl_stream_eat_if_available(struct isl_stream *s, int type)
505 struct isl_token *tok;
507 tok = isl_stream_next_token(s);
510 if (tok->type == type) {
514 isl_stream_push_token(s, tok);
518 int isl_stream_next_token_is(struct isl_stream *s, int type)
520 struct isl_token *tok;
523 tok = isl_stream_next_token(s);
526 r = tok->type == type;
527 isl_stream_push_token(s, tok);
531 char *isl_stream_read_ident_if_available(struct isl_stream *s)
533 struct isl_token *tok;
535 tok = isl_stream_next_token(s);
538 if (tok->type == ISL_TOKEN_IDENT) {
539 char *ident = strdup(tok->u.s);
543 isl_stream_push_token(s, tok);
547 int isl_stream_eat(struct isl_stream *s, int type)
549 struct isl_token *tok;
551 tok = isl_stream_next_token(s);
554 if (tok->type == type) {
558 isl_stream_error(s, tok, "expecting other token");
559 isl_stream_push_token(s, tok);
563 int isl_stream_is_empty(struct isl_stream *s)
565 struct isl_token *tok;
567 tok = isl_stream_next_token(s);
572 isl_stream_push_token(s, tok);
576 static int free_keyword(void **p, void *user)
578 struct isl_keyword *keyword = *p;
586 void isl_stream_flush_tokens(struct isl_stream *s)
592 for (i = 0; i < s->n_token; ++i)
593 isl_token_free(s->tokens[i]);
597 void isl_stream_free(struct isl_stream *s)
602 if (s->n_token != 0) {
603 struct isl_token *tok = isl_stream_next_token(s);
604 isl_stream_error(s, tok, "unexpected token");
608 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
609 isl_hash_table_free(s->ctx, s->keywords);
611 isl_ctx_deref(s->ctx);