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
);
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
);
118 for (i
= 0; i
< 5; ++i
)
123 s
->buffer
= isl_alloc_array(ctx
, char, s
->size
);
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
);
150 static int isl_stream_getc(struct isl_stream
*s
)
175 static void isl_stream_ungetc(struct isl_stream
*s
, int c
)
184 static int isl_stream_push_char(struct isl_stream
*s
, int c
)
186 if (s
->len
>= s
->size
) {
187 s
->size
= (3*s
->size
)/2;
188 s
->buffer
= isl_realloc_array(s
->ctx
, s
->buffer
, char, s
->size
);
192 s
->buffer
[s
->len
++] = c
;
196 void isl_stream_push_token(struct isl_stream
*s
, struct isl_token
*tok
)
198 isl_assert(s
->ctx
, s
->n_token
< 5, return);
199 s
->tokens
[s
->n_token
++] = tok
;
202 static enum isl_token_type
check_keywords(struct isl_stream
*s
)
204 struct isl_hash_table_entry
*entry
;
205 struct isl_keyword
*keyword
;
208 if (!strcasecmp(s
->buffer
, "exists"))
209 return ISL_TOKEN_EXISTS
;
210 if (!strcasecmp(s
->buffer
, "and"))
211 return ISL_TOKEN_AND
;
212 if (!strcasecmp(s
->buffer
, "or"))
214 if (!strcasecmp(s
->buffer
, "infty"))
215 return ISL_TOKEN_INFTY
;
216 if (!strcasecmp(s
->buffer
, "infinity"))
217 return ISL_TOKEN_INFTY
;
218 if (!strcasecmp(s
->buffer
, "NaN"))
219 return ISL_TOKEN_NAN
;
222 return ISL_TOKEN_IDENT
;
224 name_hash
= isl_hash_string(isl_hash_init(), s
->buffer
);
225 entry
= isl_hash_table_find(s
->ctx
, s
->keywords
, name_hash
, same_name
,
228 keyword
= entry
->data
;
229 return keyword
->type
;
232 return ISL_TOKEN_IDENT
;
235 int isl_stream_skip_line(struct isl_stream
*s
)
239 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '\n')
243 return c
== -1 ? -1 : 0;
246 static struct isl_token
*next_token(struct isl_stream
*s
, int same_line
)
249 struct isl_token
*tok
= NULL
;
251 int old_line
= s
->line
;
254 if (same_line
&& s
->tokens
[s
->n_token
- 1]->on_new_line
)
256 return s
->tokens
[--s
->n_token
];
259 if (same_line
&& s
->c
== '\n')
264 /* skip spaces and comment lines */
265 while ((c
= isl_stream_getc(s
)) != -1) {
267 if (isl_stream_skip_line(s
) < 0)
272 } else if (!isspace(c
) || (same_line
&& c
== '\n'))
279 if (c
== -1 || (same_line
&& c
== '\n'))
297 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
300 tok
->type
= (enum isl_token_type
)c
;
305 if ((c
= isl_stream_getc(s
)) == '>') {
306 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
309 tok
->type
= ISL_TOKEN_TO
;
313 isl_stream_ungetc(s
, c
);
315 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
318 tok
->type
= (enum isl_token_type
) '-';
322 if (c
== '-' || isdigit(c
)) {
323 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
326 tok
->type
= ISL_TOKEN_VALUE
;
327 isl_int_init(tok
->u
.v
);
328 if (isl_stream_push_char(s
, c
))
330 while ((c
= isl_stream_getc(s
)) != -1 && isdigit(c
))
331 if (isl_stream_push_char(s
, c
))
334 isl_stream_ungetc(s
, c
);
335 isl_stream_push_char(s
, '\0');
336 isl_int_read(tok
->u
.v
, s
->buffer
);
340 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
343 isl_stream_push_char(s
, c
);
344 while ((c
= isl_stream_getc(s
)) != -1 &&
345 (isalnum(c
) || c
== '_'))
346 isl_stream_push_char(s
, c
);
348 isl_stream_ungetc(s
, c
);
349 while ((c
= isl_stream_getc(s
)) != -1 && c
== '\'')
350 isl_stream_push_char(s
, c
);
352 isl_stream_ungetc(s
, c
);
353 isl_stream_push_char(s
, '\0');
354 tok
->type
= check_keywords(s
);
355 if (tok
->type
== ISL_TOKEN_IDENT
)
356 tok
->u
.s
= strdup(s
->buffer
);
360 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
363 tok
->type
= ISL_TOKEN_STRING
;
365 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '"' && c
!= '\n')
366 isl_stream_push_char(s
, c
);
368 isl_stream_error(s
, NULL
, "unterminated string");
371 isl_stream_push_char(s
, '\0');
372 tok
->u
.s
= strdup(s
->buffer
);
377 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
380 if ((c
= isl_stream_getc(s
)) == '=') {
381 tok
->type
= ISL_TOKEN_DEF
;
385 isl_stream_ungetc(s
, c
);
386 tok
->type
= (enum isl_token_type
) ':';
391 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
394 if ((c
= isl_stream_getc(s
)) == '=') {
395 tok
->type
= ISL_TOKEN_GE
;
397 } else if (c
== '>') {
398 if ((c
= isl_stream_getc(s
)) == '=') {
399 tok
->type
= ISL_TOKEN_LEX_GE
;
402 tok
->type
= ISL_TOKEN_LEX_GT
;
404 tok
->type
= ISL_TOKEN_GT
;
406 isl_stream_ungetc(s
, c
);
411 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
414 if ((c
= isl_stream_getc(s
)) == '=') {
415 tok
->type
= ISL_TOKEN_LE
;
417 } else if (c
== '<') {
418 if ((c
= isl_stream_getc(s
)) == '=') {
419 tok
->type
= ISL_TOKEN_LEX_LE
;
422 tok
->type
= ISL_TOKEN_LEX_LT
;
424 tok
->type
= ISL_TOKEN_LT
;
426 isl_stream_ungetc(s
, c
);
430 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
433 tok
->type
= ISL_TOKEN_AND
;
434 if ((c
= isl_stream_getc(s
)) != '&' && c
!= -1)
435 isl_stream_ungetc(s
, c
);
439 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
442 tok
->type
= ISL_TOKEN_OR
;
443 if ((c
= isl_stream_getc(s
)) != '|' && c
!= -1)
444 isl_stream_ungetc(s
, c
);
448 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
451 tok
->type
= ISL_TOKEN_UNKNOWN
;
458 struct isl_token
*isl_stream_next_token(struct isl_stream
*s
)
460 return next_token(s
, 0);
463 struct isl_token
*isl_stream_next_token_on_same_line(struct isl_stream
*s
)
465 return next_token(s
, 1);
468 int isl_stream_eat_if_available(struct isl_stream
*s
, int type
)
470 struct isl_token
*tok
;
472 tok
= isl_stream_next_token(s
);
475 if (tok
->type
== type
) {
479 isl_stream_push_token(s
, tok
);
483 int isl_stream_next_token_is(struct isl_stream
*s
, int type
)
485 struct isl_token
*tok
;
488 tok
= isl_stream_next_token(s
);
491 r
= tok
->type
== type
;
492 isl_stream_push_token(s
, tok
);
496 char *isl_stream_read_ident_if_available(struct isl_stream
*s
)
498 struct isl_token
*tok
;
500 tok
= isl_stream_next_token(s
);
503 if (tok
->type
== ISL_TOKEN_IDENT
) {
504 char *ident
= strdup(tok
->u
.s
);
508 isl_stream_push_token(s
, tok
);
512 int isl_stream_eat(struct isl_stream
*s
, int type
)
514 struct isl_token
*tok
;
516 tok
= isl_stream_next_token(s
);
519 if (tok
->type
== type
) {
523 isl_stream_error(s
, tok
, "expecting other token");
524 isl_stream_push_token(s
, tok
);
528 int isl_stream_is_empty(struct isl_stream
*s
)
530 struct isl_token
*tok
;
532 tok
= isl_stream_next_token(s
);
537 isl_stream_push_token(s
, tok
);
541 static int free_keyword(void *p
)
543 struct isl_keyword
*keyword
= p
;
551 void isl_stream_flush_tokens(struct isl_stream
*s
)
557 for (i
= 0; i
< s
->n_token
; ++i
)
558 isl_token_free(s
->tokens
[i
]);
562 void isl_stream_free(struct isl_stream
*s
)
567 if (s
->n_token
!= 0) {
568 struct isl_token
*tok
= isl_stream_next_token(s
);
569 isl_stream_error(s
, tok
, "unexpected token");
573 isl_hash_table_foreach(s
->ctx
, s
->keywords
, free_keyword
);
574 isl_hash_table_free(s
->ctx
, s
->keywords
);
576 isl_ctx_deref(s
->ctx
);