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
;
80 void isl_token_free(struct isl_token
*tok
)
84 if (tok
->type
== ISL_TOKEN_VALUE
)
85 isl_int_clear(tok
->u
.v
);
86 else if (tok
->type
== ISL_TOKEN_IDENT
||
87 tok
->type
== ISL_TOKEN_STRING
||
93 void isl_stream_error(struct isl_stream
*s
, struct isl_token
*tok
, char *msg
)
95 int line
= tok
? tok
->line
: s
->line
;
96 int col
= tok
? tok
->col
: s
->col
;
97 fprintf(stderr
, "syntax error (%d, %d): %s\n", line
, col
, msg
);
100 fprintf(stderr
, "got '%c'\n", tok
->type
);
101 else if (tok
->type
== ISL_TOKEN_IDENT
)
102 fprintf(stderr
, "got ident '%s'\n", tok
->u
.s
);
103 else if (tok
->is_keyword
)
104 fprintf(stderr
, "got keyword '%s'\n", tok
->u
.s
);
106 fprintf(stderr
, "got token type %d\n", tok
->type
);
110 static struct isl_stream
* isl_stream_new(struct isl_ctx
*ctx
)
113 struct isl_stream
*s
= isl_alloc_type(ctx
, struct isl_stream
);
125 for (i
= 0; i
< 5; ++i
)
130 s
->buffer
= isl_alloc_array(ctx
, char, s
->size
);
139 struct isl_stream
* isl_stream_new_file(struct isl_ctx
*ctx
, FILE *file
)
141 struct isl_stream
*s
= isl_stream_new(ctx
);
148 struct isl_stream
* isl_stream_new_str(struct isl_ctx
*ctx
, const char *str
)
150 struct isl_stream
*s
= isl_stream_new(ctx
);
157 static int isl_stream_getc(struct isl_stream
*s
)
182 static void isl_stream_ungetc(struct isl_stream
*s
, int c
)
191 static int isl_stream_push_char(struct isl_stream
*s
, int c
)
193 if (s
->len
>= s
->size
) {
194 s
->size
= (3*s
->size
)/2;
195 s
->buffer
= isl_realloc_array(s
->ctx
, s
->buffer
, char, s
->size
);
199 s
->buffer
[s
->len
++] = c
;
203 void isl_stream_push_token(struct isl_stream
*s
, struct isl_token
*tok
)
205 isl_assert(s
->ctx
, s
->n_token
< 5, return);
206 s
->tokens
[s
->n_token
++] = tok
;
209 static enum isl_token_type
check_keywords(struct isl_stream
*s
)
211 struct isl_hash_table_entry
*entry
;
212 struct isl_keyword
*keyword
;
215 if (!strcasecmp(s
->buffer
, "exists"))
216 return ISL_TOKEN_EXISTS
;
217 if (!strcasecmp(s
->buffer
, "and"))
218 return ISL_TOKEN_AND
;
219 if (!strcasecmp(s
->buffer
, "or"))
221 if (!strcasecmp(s
->buffer
, "infty"))
222 return ISL_TOKEN_INFTY
;
223 if (!strcasecmp(s
->buffer
, "infinity"))
224 return ISL_TOKEN_INFTY
;
225 if (!strcasecmp(s
->buffer
, "NaN"))
226 return ISL_TOKEN_NAN
;
227 if (!strcasecmp(s
->buffer
, "max"))
228 return ISL_TOKEN_MAX
;
231 return ISL_TOKEN_IDENT
;
233 name_hash
= isl_hash_string(isl_hash_init(), s
->buffer
);
234 entry
= isl_hash_table_find(s
->ctx
, s
->keywords
, name_hash
, same_name
,
237 keyword
= entry
->data
;
238 return keyword
->type
;
241 return ISL_TOKEN_IDENT
;
244 int isl_stream_skip_line(struct isl_stream
*s
)
248 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '\n')
252 return c
== -1 ? -1 : 0;
255 static struct isl_token
*next_token(struct isl_stream
*s
, int same_line
)
258 struct isl_token
*tok
= NULL
;
260 int old_line
= s
->line
;
263 if (same_line
&& s
->tokens
[s
->n_token
- 1]->on_new_line
)
265 return s
->tokens
[--s
->n_token
];
268 if (same_line
&& s
->c
== '\n')
273 /* skip spaces and comment lines */
274 while ((c
= isl_stream_getc(s
)) != -1) {
276 if (isl_stream_skip_line(s
) < 0)
281 } else if (!isspace(c
) || (same_line
&& c
== '\n'))
288 if (c
== -1 || (same_line
&& c
== '\n'))
306 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
309 tok
->type
= (enum isl_token_type
)c
;
314 if ((c
= isl_stream_getc(s
)) == '>') {
315 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
318 tok
->type
= ISL_TOKEN_TO
;
322 isl_stream_ungetc(s
, c
);
324 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
327 tok
->type
= (enum isl_token_type
) '-';
331 if (c
== '-' || isdigit(c
)) {
332 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
335 tok
->type
= ISL_TOKEN_VALUE
;
336 isl_int_init(tok
->u
.v
);
337 if (isl_stream_push_char(s
, c
))
339 while ((c
= isl_stream_getc(s
)) != -1 && isdigit(c
))
340 if (isl_stream_push_char(s
, c
))
343 isl_stream_ungetc(s
, c
);
344 isl_stream_push_char(s
, '\0');
345 isl_int_read(tok
->u
.v
, s
->buffer
);
348 if (isalpha(c
) || c
== '_') {
349 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
352 isl_stream_push_char(s
, c
);
353 while ((c
= isl_stream_getc(s
)) != -1 &&
354 (isalnum(c
) || c
== '_'))
355 isl_stream_push_char(s
, c
);
357 isl_stream_ungetc(s
, c
);
358 while ((c
= isl_stream_getc(s
)) != -1 && c
== '\'')
359 isl_stream_push_char(s
, c
);
361 isl_stream_ungetc(s
, c
);
362 isl_stream_push_char(s
, '\0');
363 tok
->type
= check_keywords(s
);
364 if (tok
->type
!= ISL_TOKEN_IDENT
)
366 tok
->u
.s
= strdup(s
->buffer
);
372 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
375 tok
->type
= ISL_TOKEN_STRING
;
377 while ((c
= isl_stream_getc(s
)) != -1 && c
!= '"' && c
!= '\n')
378 isl_stream_push_char(s
, c
);
380 isl_stream_error(s
, NULL
, "unterminated string");
383 isl_stream_push_char(s
, '\0');
384 tok
->u
.s
= strdup(s
->buffer
);
389 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
392 if ((c
= isl_stream_getc(s
)) == '=') {
393 tok
->type
= ISL_TOKEN_DEF
;
397 isl_stream_ungetc(s
, c
);
398 tok
->type
= (enum isl_token_type
) ':';
403 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
406 if ((c
= isl_stream_getc(s
)) == '=') {
407 tok
->type
= ISL_TOKEN_GE
;
409 } else if (c
== '>') {
410 if ((c
= isl_stream_getc(s
)) == '=') {
411 tok
->type
= ISL_TOKEN_LEX_GE
;
414 tok
->type
= ISL_TOKEN_LEX_GT
;
416 tok
->type
= ISL_TOKEN_GT
;
418 isl_stream_ungetc(s
, c
);
423 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
426 if ((c
= isl_stream_getc(s
)) == '=') {
427 tok
->type
= ISL_TOKEN_LE
;
429 } else if (c
== '<') {
430 if ((c
= isl_stream_getc(s
)) == '=') {
431 tok
->type
= ISL_TOKEN_LEX_LE
;
434 tok
->type
= ISL_TOKEN_LEX_LT
;
436 tok
->type
= ISL_TOKEN_LT
;
438 isl_stream_ungetc(s
, c
);
442 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
445 tok
->type
= ISL_TOKEN_AND
;
446 if ((c
= isl_stream_getc(s
)) != '&' && c
!= -1)
447 isl_stream_ungetc(s
, c
);
451 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
454 tok
->type
= ISL_TOKEN_OR
;
455 if ((c
= isl_stream_getc(s
)) != '|' && c
!= -1)
456 isl_stream_ungetc(s
, c
);
460 tok
= isl_token_new(s
->ctx
, line
, col
, old_line
!= line
);
463 tok
->type
= ISL_TOKEN_UNKNOWN
;
470 struct isl_token
*isl_stream_next_token(struct isl_stream
*s
)
472 return next_token(s
, 0);
475 struct isl_token
*isl_stream_next_token_on_same_line(struct isl_stream
*s
)
477 return next_token(s
, 1);
480 int isl_stream_eat_if_available(struct isl_stream
*s
, int type
)
482 struct isl_token
*tok
;
484 tok
= isl_stream_next_token(s
);
487 if (tok
->type
== type
) {
491 isl_stream_push_token(s
, tok
);
495 int isl_stream_next_token_is(struct isl_stream
*s
, int type
)
497 struct isl_token
*tok
;
500 tok
= isl_stream_next_token(s
);
503 r
= tok
->type
== type
;
504 isl_stream_push_token(s
, tok
);
508 char *isl_stream_read_ident_if_available(struct isl_stream
*s
)
510 struct isl_token
*tok
;
512 tok
= isl_stream_next_token(s
);
515 if (tok
->type
== ISL_TOKEN_IDENT
) {
516 char *ident
= strdup(tok
->u
.s
);
520 isl_stream_push_token(s
, tok
);
524 int isl_stream_eat(struct isl_stream
*s
, int type
)
526 struct isl_token
*tok
;
528 tok
= isl_stream_next_token(s
);
531 if (tok
->type
== type
) {
535 isl_stream_error(s
, tok
, "expecting other token");
536 isl_stream_push_token(s
, tok
);
540 int isl_stream_is_empty(struct isl_stream
*s
)
542 struct isl_token
*tok
;
544 tok
= isl_stream_next_token(s
);
549 isl_stream_push_token(s
, tok
);
553 static int free_keyword(void **p
, void *user
)
555 struct isl_keyword
*keyword
= *p
;
563 void isl_stream_flush_tokens(struct isl_stream
*s
)
569 for (i
= 0; i
< s
->n_token
; ++i
)
570 isl_token_free(s
->tokens
[i
]);
574 void isl_stream_free(struct isl_stream
*s
)
579 if (s
->n_token
!= 0) {
580 struct isl_token
*tok
= isl_stream_next_token(s
);
581 isl_stream_error(s
, tok
, "unexpected token");
585 isl_hash_table_foreach(s
->ctx
, s
->keywords
, &free_keyword
, NULL
);
586 isl_hash_table_free(s
->ctx
, s
->keywords
);
588 isl_ctx_deref(s
->ctx
);