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 stream_getc(struct isl_stream
*s
)
187 static int isl_stream_getc(struct isl_stream
*s
)
201 static void isl_stream_ungetc(struct isl_stream
*s
, int c
)
210 static int isl_stream_push_char(struct isl_stream
*s
, int c
)
212 if (s
->len
>= s
->size
) {
213 s
->size
= (3*s
->size
)/2;
214 s
->buffer
= isl_realloc_array(s
->ctx
, s
->buffer
, char, s
->size
);
218 s
->buffer
[s
->len
++] = c
;
222 void isl_stream_push_token(struct isl_stream
*s
, struct isl_token
*tok
)
224 isl_assert(s
->ctx
, s
->n_token
< 5, return);
225 s
->tokens
[s
->n_token
++] = tok
;
228 static enum isl_token_type
check_keywords(struct isl_stream
*s
)
230 struct isl_hash_table_entry
*entry
;
231 struct isl_keyword
*keyword
;
234 if (!strcasecmp(s
->buffer
, "exists"))
235 return ISL_TOKEN_EXISTS
;
236 if (!strcasecmp(s
->buffer
, "and"))
237 return ISL_TOKEN_AND
;
238 if (!strcasecmp(s
->buffer
, "or"))
240 if (!strcasecmp(s
->buffer
, "not"))
241 return ISL_TOKEN_NOT
;
242 if (!strcasecmp(s
->buffer
, "infty"))
243 return ISL_TOKEN_INFTY
;
244 if (!strcasecmp(s
->buffer
, "infinity"))
245 return ISL_TOKEN_INFTY
;
246 if (!strcasecmp(s
->buffer
, "NaN"))
247 return ISL_TOKEN_NAN
;
248 if (!strcasecmp(s
->buffer
, "max"))
249 return ISL_TOKEN_MAX
;
250 if (!strcasecmp(s
->buffer
, "rat"))
251 return ISL_TOKEN_RAT
;
252 if (!strcasecmp(s
->buffer
, "true"))
253 return ISL_TOKEN_TRUE
;
254 if (!strcasecmp(s
->buffer
, "false"))
255 return ISL_TOKEN_FALSE
;
258 return ISL_TOKEN_IDENT
;
260 name_hash
= isl_hash_string(isl_hash_init(), s
->buffer
);
261 entry
= isl_hash_table_find(s
->ctx
, s
->keywords
, name_hash
, same_name
,
264 keyword
= entry
->data
;
265 return keyword
->type
;
268 return ISL_TOKEN_IDENT
;
271 int isl_stream_skip_line(struct isl_stream
*s
)
275 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '\n')
279 return c
== -1 ? -1 : 0;
282 static struct isl_token
*next_token(struct isl_stream
*s
, int same_line
)
285 struct isl_token
*tok
= NULL
;
287 int old_line
= s
->line
;
290 if (same_line
&& s
->tokens
[s
->n_token
- 1]->on_new_line
)
292 return s
->tokens
[--s
->n_token
];
295 if (same_line
&& s
->c
== '\n')
300 /* skip spaces and comment lines */
301 while ((c
= isl_stream_getc(s
)) != -1) {
303 if (isl_stream_skip_line(s
) < 0)
308 } else if (!isspace(c
) || (same_line
&& c
== '\n'))
315 if (c
== -1 || (same_line
&& c
== '\n'))
333 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
336 tok
->type
= (enum isl_token_type
)c
;
341 if ((c
= isl_stream_getc(s
)) == '>') {
342 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
345 tok
->u
.s
= strdup("->");
346 tok
->type
= ISL_TOKEN_TO
;
350 isl_stream_ungetc(s
, c
);
352 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
355 tok
->type
= (enum isl_token_type
) '-';
359 if (c
== '-' || isdigit(c
)) {
360 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
363 tok
->type
= ISL_TOKEN_VALUE
;
364 isl_int_init(tok
->u
.v
);
365 if (isl_stream_push_char(s
, c
))
367 while ((c
= isl_stream_getc(s
)) != -1 && isdigit(c
))
368 if (isl_stream_push_char(s
, c
))
371 isl_stream_ungetc(s
, c
);
372 isl_stream_push_char(s
, '\0');
373 isl_int_read(tok
->u
.v
, s
->buffer
);
376 if (isalpha(c
) || c
== '_') {
377 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
380 isl_stream_push_char(s
, c
);
381 while ((c
= isl_stream_getc(s
)) != -1 &&
382 (isalnum(c
) || c
== '_'))
383 isl_stream_push_char(s
, c
);
385 isl_stream_ungetc(s
, c
);
386 while ((c
= isl_stream_getc(s
)) != -1 && c
== '\'')
387 isl_stream_push_char(s
, c
);
389 isl_stream_ungetc(s
, c
);
390 isl_stream_push_char(s
, '\0');
391 tok
->type
= check_keywords(s
);
392 if (tok
->type
!= ISL_TOKEN_IDENT
)
394 tok
->u
.s
= strdup(s
->buffer
);
400 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
403 tok
->type
= ISL_TOKEN_STRING
;
405 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '"' && c
!= '\n')
406 isl_stream_push_char(s
, c
);
408 isl_stream_error(s
, NULL
, "unterminated string");
411 isl_stream_push_char(s
, '\0');
412 tok
->u
.s
= strdup(s
->buffer
);
417 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
420 if ((c
= isl_stream_getc(s
)) == '=') {
421 tok
->u
.s
= strdup(":=");
422 tok
->type
= ISL_TOKEN_DEF
;
426 isl_stream_ungetc(s
, c
);
427 tok
->type
= (enum isl_token_type
) ':';
432 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
435 if ((c
= isl_stream_getc(s
)) == '=') {
436 tok
->u
.s
= strdup(">=");
437 tok
->type
= ISL_TOKEN_GE
;
439 } else if (c
== '>') {
440 if ((c
= isl_stream_getc(s
)) == '=') {
441 tok
->u
.s
= strdup(">>=");
442 tok
->type
= ISL_TOKEN_LEX_GE
;
445 tok
->u
.s
= strdup(">>");
446 tok
->type
= ISL_TOKEN_LEX_GT
;
448 tok
->u
.s
= strdup(">");
449 tok
->type
= ISL_TOKEN_GT
;
452 isl_stream_ungetc(s
, c
);
457 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
460 if ((c
= isl_stream_getc(s
)) == '=') {
461 tok
->u
.s
= strdup("<=");
462 tok
->type
= ISL_TOKEN_LE
;
464 } else if (c
== '<') {
465 if ((c
= isl_stream_getc(s
)) == '=') {
466 tok
->u
.s
= strdup("<<=");
467 tok
->type
= ISL_TOKEN_LEX_LE
;
470 tok
->u
.s
= strdup("<<");
471 tok
->type
= ISL_TOKEN_LEX_LT
;
473 tok
->u
.s
= strdup("<");
474 tok
->type
= ISL_TOKEN_LT
;
477 isl_stream_ungetc(s
, c
);
481 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
484 tok
->type
= ISL_TOKEN_AND
;
485 if ((c
= isl_stream_getc(s
)) != '&' && c
!= -1) {
486 tok
->u
.s
= strdup("&");
487 isl_stream_ungetc(s
, c
);
489 tok
->u
.s
= strdup("&&");
493 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
496 tok
->type
= ISL_TOKEN_OR
;
497 if ((c
= isl_stream_getc(s
)) != '|' && c
!= -1) {
498 tok
->u
.s
= strdup("|");
499 isl_stream_ungetc(s
, c
);
501 tok
->u
.s
= strdup("||");
505 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
508 tok
->type
= ISL_TOKEN_NOT
;
509 tok
->u
.s
= strdup("!");
513 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
516 tok
->type
= ISL_TOKEN_UNKNOWN
;
523 struct isl_token
*isl_stream_next_token(struct isl_stream
*s
)
525 return next_token(s
, 0);
528 struct isl_token
*isl_stream_next_token_on_same_line(struct isl_stream
*s
)
530 return next_token(s
, 1);
533 int isl_stream_eat_if_available(struct isl_stream
*s
, int type
)
535 struct isl_token
*tok
;
537 tok
= isl_stream_next_token(s
);
540 if (tok
->type
== type
) {
544 isl_stream_push_token(s
, tok
);
548 int isl_stream_next_token_is(struct isl_stream
*s
, int type
)
550 struct isl_token
*tok
;
553 tok
= isl_stream_next_token(s
);
556 r
= tok
->type
== type
;
557 isl_stream_push_token(s
, tok
);
561 char *isl_stream_read_ident_if_available(struct isl_stream
*s
)
563 struct isl_token
*tok
;
565 tok
= isl_stream_next_token(s
);
568 if (tok
->type
== ISL_TOKEN_IDENT
) {
569 char *ident
= strdup(tok
->u
.s
);
573 isl_stream_push_token(s
, tok
);
577 int isl_stream_eat(struct isl_stream
*s
, int type
)
579 struct isl_token
*tok
;
581 tok
= isl_stream_next_token(s
);
584 if (tok
->type
== type
) {
588 isl_stream_error(s
, tok
, "expecting other token");
589 isl_stream_push_token(s
, tok
);
593 int isl_stream_is_empty(struct isl_stream
*s
)
595 struct isl_token
*tok
;
597 tok
= isl_stream_next_token(s
);
602 isl_stream_push_token(s
, tok
);
606 static int free_keyword(void **p
, void *user
)
608 struct isl_keyword
*keyword
= *p
;
616 void isl_stream_flush_tokens(struct isl_stream
*s
)
622 for (i
= 0; i
< s
->n_token
; ++i
)
623 isl_token_free(s
->tokens
[i
]);
627 void isl_stream_free(struct isl_stream
*s
)
632 if (s
->n_token
!= 0) {
633 struct isl_token
*tok
= isl_stream_next_token(s
);
634 isl_stream_error(s
, tok
, "unexpected token");
638 isl_hash_table_foreach(s
->ctx
, s
->keywords
, &free_keyword
, NULL
);
639 isl_hash_table_free(s
->ctx
, s
->keywords
);
641 isl_ctx_deref(s
->ctx
);