2 * Copyright 2008-2009 Katholieke Universiteit Leuven
4 * Use of this software is governed by the MIT license
6 * Written by Sven Verdoolaege, K.U.Leuven, Departement
7 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
14 #include <isl_stream_private.h>
17 #include <isl_val_private.h>
21 enum isl_token_type type;
24 static int same_name(const void *entry, const void *val)
26 const struct isl_keyword *keyword = (const struct isl_keyword *)entry;
28 return !strcmp(keyword->name, val);
31 enum isl_token_type isl_stream_register_keyword(struct isl_stream *s,
34 struct isl_hash_table_entry *entry;
35 struct isl_keyword *keyword;
39 s->keywords = isl_hash_table_alloc(s->ctx, 10);
41 return ISL_TOKEN_ERROR;
42 s->next_type = ISL_TOKEN_LAST;
45 name_hash = isl_hash_string(isl_hash_init(), name);
47 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash,
50 return ISL_TOKEN_ERROR;
52 keyword = entry->data;
56 keyword = isl_calloc_type(s->ctx, struct isl_keyword);
58 return ISL_TOKEN_ERROR;
59 keyword->type = s->next_type++;
60 keyword->name = strdup(name);
63 return ISL_TOKEN_ERROR;
65 entry->data = keyword;
70 struct isl_token *isl_token_new(isl_ctx *ctx,
71 int line, int col, unsigned on_new_line)
73 struct isl_token *tok = isl_alloc_type(ctx, struct isl_token);
78 tok->on_new_line = on_new_line;
84 /* Return the type of "tok".
86 int isl_token_get_type(struct isl_token *tok)
88 return tok ? tok->type : ISL_TOKEN_ERROR;
91 /* Given a token of type ISL_TOKEN_VALUE, return the value it represents.
93 __isl_give isl_val *isl_token_get_val(isl_ctx *ctx, struct isl_token *tok)
97 if (tok->type != ISL_TOKEN_VALUE)
98 isl_die(ctx, isl_error_invalid, "not a value token",
101 return isl_val_int_from_isl_int(ctx, tok->u.v);
104 /* Given a token of type ISL_TOKEN_STRING, return the string it represents.
106 __isl_give char *isl_token_get_str(isl_ctx *ctx, struct isl_token *tok)
110 if (tok->type != ISL_TOKEN_STRING)
111 isl_die(ctx, isl_error_invalid, "not a string token",
114 return strdup(tok->u.s);
117 void isl_token_free(struct isl_token *tok)
121 if (tok->type == ISL_TOKEN_VALUE)
122 isl_int_clear(tok->u.v);
123 else if (tok->type == ISL_TOKEN_MAP)
124 isl_map_free(tok->u.map);
125 else if (tok->type == ISL_TOKEN_AFF)
126 isl_pw_aff_free(tok->u.pwaff);
132 void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg)
134 int line = tok ? tok->line : s->line;
135 int col = tok ? tok->col : s->col;
136 fprintf(stderr, "syntax error (%d, %d): %s\n", line, col, msg);
139 fprintf(stderr, "got '%c'\n", tok->type);
140 else if (tok->type == ISL_TOKEN_IDENT)
141 fprintf(stderr, "got ident '%s'\n", tok->u.s);
142 else if (tok->is_keyword)
143 fprintf(stderr, "got keyword '%s'\n", tok->u.s);
144 else if (tok->type == ISL_TOKEN_VALUE) {
145 fprintf(stderr, "got value '");
146 isl_int_print(stderr, tok->u.v, 0);
147 fprintf(stderr, "'\n");
148 } else if (tok->type == ISL_TOKEN_MAP) {
150 fprintf(stderr, "got map '");
151 p = isl_printer_to_file(s->ctx, stderr);
152 p = isl_printer_print_map(p, tok->u.map);
154 fprintf(stderr, "'\n");
155 } else if (tok->type == ISL_TOKEN_AFF) {
157 fprintf(stderr, "got affine expression '");
158 p = isl_printer_to_file(s->ctx, stderr);
159 p = isl_printer_print_pw_aff(p, tok->u.pwaff);
161 fprintf(stderr, "'\n");
163 fprintf(stderr, "got token '%s'\n", tok->u.s);
165 fprintf(stderr, "got token type %d\n", tok->type);
169 static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
172 struct isl_stream *s = isl_alloc_type(ctx, struct isl_stream);
185 for (i = 0; i < 5; ++i)
190 s->buffer = isl_alloc_array(ctx, char, s->size);
199 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
201 struct isl_stream *s = isl_stream_new(ctx);
208 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
210 struct isl_stream *s;
213 s = isl_stream_new(ctx);
220 static int stream_getc(struct isl_stream *s)
226 return s->c = s->un[--s->n_un];
247 static void isl_stream_ungetc(struct isl_stream *s, int c)
249 isl_assert(s->ctx, s->n_un < 5, return);
250 s->un[s->n_un++] = c;
254 static int isl_stream_getc(struct isl_stream *s)
265 isl_stream_ungetc(s, c);
270 static int isl_stream_push_char(struct isl_stream *s, int c)
272 if (s->len >= s->size) {
274 s->size = (3*s->size)/2;
275 buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
280 s->buffer[s->len++] = c;
284 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok)
286 isl_assert(s->ctx, s->n_token < 5, return);
287 s->tokens[s->n_token++] = tok;
290 static enum isl_token_type check_keywords(struct isl_stream *s)
292 struct isl_hash_table_entry *entry;
293 struct isl_keyword *keyword;
296 if (!strcasecmp(s->buffer, "exists"))
297 return ISL_TOKEN_EXISTS;
298 if (!strcasecmp(s->buffer, "and"))
299 return ISL_TOKEN_AND;
300 if (!strcasecmp(s->buffer, "or"))
302 if (!strcasecmp(s->buffer, "not"))
303 return ISL_TOKEN_NOT;
304 if (!strcasecmp(s->buffer, "infty"))
305 return ISL_TOKEN_INFTY;
306 if (!strcasecmp(s->buffer, "infinity"))
307 return ISL_TOKEN_INFTY;
308 if (!strcasecmp(s->buffer, "NaN"))
309 return ISL_TOKEN_NAN;
310 if (!strcasecmp(s->buffer, "min"))
311 return ISL_TOKEN_MIN;
312 if (!strcasecmp(s->buffer, "max"))
313 return ISL_TOKEN_MAX;
314 if (!strcasecmp(s->buffer, "rat"))
315 return ISL_TOKEN_RAT;
316 if (!strcasecmp(s->buffer, "true"))
317 return ISL_TOKEN_TRUE;
318 if (!strcasecmp(s->buffer, "false"))
319 return ISL_TOKEN_FALSE;
320 if (!strcasecmp(s->buffer, "ceild"))
321 return ISL_TOKEN_CEILD;
322 if (!strcasecmp(s->buffer, "floord"))
323 return ISL_TOKEN_FLOORD;
324 if (!strcasecmp(s->buffer, "mod"))
325 return ISL_TOKEN_MOD;
328 return ISL_TOKEN_IDENT;
330 name_hash = isl_hash_string(isl_hash_init(), s->buffer);
331 entry = isl_hash_table_find(s->ctx, s->keywords, name_hash, same_name,
334 keyword = entry->data;
335 return keyword->type;
338 return ISL_TOKEN_IDENT;
341 int isl_stream_skip_line(struct isl_stream *s)
345 while ((c = isl_stream_getc(s)) != -1 && c != '\n')
349 return c == -1 ? -1 : 0;
352 static struct isl_token *next_token(struct isl_stream *s, int same_line)
355 struct isl_token *tok = NULL;
357 int old_line = s->line;
360 if (same_line && s->tokens[s->n_token - 1]->on_new_line)
362 return s->tokens[--s->n_token];
365 if (same_line && s->c == '\n')
370 /* skip spaces and comment lines */
371 while ((c = isl_stream_getc(s)) != -1) {
373 if (isl_stream_skip_line(s) < 0)
378 } else if (!isspace(c) || (same_line && c == '\n'))
385 if (c == -1 || (same_line && c == '\n'))
403 tok = isl_token_new(s->ctx, line, col, old_line != line);
406 tok->type = (enum isl_token_type)c;
411 if ((c = isl_stream_getc(s)) == '>') {
412 tok = isl_token_new(s->ctx, line, col, old_line != line);
415 tok->u.s = strdup("->");
416 tok->type = ISL_TOKEN_TO;
420 isl_stream_ungetc(s, c);
422 tok = isl_token_new(s->ctx, line, col, old_line != line);
425 tok->type = (enum isl_token_type) '-';
429 if (c == '-' || isdigit(c)) {
430 int minus = c == '-';
431 tok = isl_token_new(s->ctx, line, col, old_line != line);
434 tok->type = ISL_TOKEN_VALUE;
435 isl_int_init(tok->u.v);
436 if (isl_stream_push_char(s, c))
438 while ((c = isl_stream_getc(s)) != -1 && isdigit(c))
439 if (isl_stream_push_char(s, c))
442 isl_stream_ungetc(s, c);
443 isl_stream_push_char(s, '\0');
444 isl_int_read(tok->u.v, s->buffer);
445 if (minus && isl_int_is_zero(tok->u.v)) {
447 tok->on_new_line = 0;
448 isl_stream_push_token(s, tok);
449 tok = isl_token_new(s->ctx, line, col, old_line != line);
452 tok->type = (enum isl_token_type) '-';
456 if (isalpha(c) || c == '_') {
457 tok = isl_token_new(s->ctx, line, col, old_line != line);
460 isl_stream_push_char(s, c);
461 while ((c = isl_stream_getc(s)) != -1 &&
462 (isalnum(c) || c == '_'))
463 isl_stream_push_char(s, c);
465 isl_stream_ungetc(s, c);
466 while ((c = isl_stream_getc(s)) != -1 && c == '\'')
467 isl_stream_push_char(s, c);
469 isl_stream_ungetc(s, c);
470 isl_stream_push_char(s, '\0');
471 tok->type = check_keywords(s);
472 if (tok->type != ISL_TOKEN_IDENT)
474 tok->u.s = strdup(s->buffer);
480 tok = isl_token_new(s->ctx, line, col, old_line != line);
483 tok->type = ISL_TOKEN_STRING;
485 while ((c = isl_stream_getc(s)) != -1 && c != '"' && c != '\n')
486 isl_stream_push_char(s, c);
488 isl_stream_error(s, NULL, "unterminated string");
491 isl_stream_push_char(s, '\0');
492 tok->u.s = strdup(s->buffer);
497 tok = isl_token_new(s->ctx, line, col, old_line != line);
500 if ((c = isl_stream_getc(s)) == '=') {
501 tok->u.s = strdup("==");
502 tok->type = ISL_TOKEN_EQ_EQ;
506 isl_stream_ungetc(s, c);
507 tok->type = (enum isl_token_type) '=';
512 tok = isl_token_new(s->ctx, line, col, old_line != line);
515 if ((c = isl_stream_getc(s)) == '=') {
516 tok->u.s = strdup(":=");
517 tok->type = ISL_TOKEN_DEF;
521 isl_stream_ungetc(s, c);
522 tok->type = (enum isl_token_type) ':';
527 tok = isl_token_new(s->ctx, line, col, old_line != line);
530 if ((c = isl_stream_getc(s)) == '=') {
531 tok->u.s = strdup(">=");
532 tok->type = ISL_TOKEN_GE;
534 } else if (c == '>') {
535 if ((c = isl_stream_getc(s)) == '=') {
536 tok->u.s = strdup(">>=");
537 tok->type = ISL_TOKEN_LEX_GE;
540 tok->u.s = strdup(">>");
541 tok->type = ISL_TOKEN_LEX_GT;
543 tok->u.s = strdup(">");
544 tok->type = ISL_TOKEN_GT;
547 isl_stream_ungetc(s, c);
552 tok = isl_token_new(s->ctx, line, col, old_line != line);
555 if ((c = isl_stream_getc(s)) == '=') {
556 tok->u.s = strdup("<=");
557 tok->type = ISL_TOKEN_LE;
559 } else if (c == '<') {
560 if ((c = isl_stream_getc(s)) == '=') {
561 tok->u.s = strdup("<<=");
562 tok->type = ISL_TOKEN_LEX_LE;
565 tok->u.s = strdup("<<");
566 tok->type = ISL_TOKEN_LEX_LT;
568 tok->u.s = strdup("<");
569 tok->type = ISL_TOKEN_LT;
572 isl_stream_ungetc(s, c);
576 tok = isl_token_new(s->ctx, line, col, old_line != line);
579 tok->type = ISL_TOKEN_AND;
580 if ((c = isl_stream_getc(s)) != '&' && c != -1) {
581 tok->u.s = strdup("&");
582 isl_stream_ungetc(s, c);
584 tok->u.s = strdup("&&");
588 tok = isl_token_new(s->ctx, line, col, old_line != line);
591 tok->type = ISL_TOKEN_OR;
592 if ((c = isl_stream_getc(s)) != '|' && c != -1) {
593 tok->u.s = strdup("|");
594 isl_stream_ungetc(s, c);
596 tok->u.s = strdup("||");
600 tok = isl_token_new(s->ctx, line, col, old_line != line);
603 if ((c = isl_stream_getc(s)) != '\\' && c != -1) {
604 tok->type = (enum isl_token_type) '/';
605 isl_stream_ungetc(s, c);
607 tok->u.s = strdup("/\\");
608 tok->type = ISL_TOKEN_AND;
613 tok = isl_token_new(s->ctx, line, col, old_line != line);
616 if ((c = isl_stream_getc(s)) != '/' && c != -1) {
617 tok->type = (enum isl_token_type) '\\';
618 isl_stream_ungetc(s, c);
620 tok->u.s = strdup("\\/");
621 tok->type = ISL_TOKEN_OR;
626 tok = isl_token_new(s->ctx, line, col, old_line != line);
629 if ((c = isl_stream_getc(s)) == '=') {
630 tok->u.s = strdup("!=");
631 tok->type = ISL_TOKEN_NE;
634 tok->type = ISL_TOKEN_NOT;
635 tok->u.s = strdup("!");
638 isl_stream_ungetc(s, c);
642 tok = isl_token_new(s->ctx, line, col, old_line != line);
645 tok->type = ISL_TOKEN_UNKNOWN;
652 struct isl_token *isl_stream_next_token(struct isl_stream *s)
654 return next_token(s, 0);
657 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
659 return next_token(s, 1);
662 int isl_stream_eat_if_available(struct isl_stream *s, int type)
664 struct isl_token *tok;
666 tok = isl_stream_next_token(s);
669 if (tok->type == type) {
673 isl_stream_push_token(s, tok);
677 int isl_stream_next_token_is(struct isl_stream *s, int type)
679 struct isl_token *tok;
682 tok = isl_stream_next_token(s);
685 r = tok->type == type;
686 isl_stream_push_token(s, tok);
690 char *isl_stream_read_ident_if_available(struct isl_stream *s)
692 struct isl_token *tok;
694 tok = isl_stream_next_token(s);
697 if (tok->type == ISL_TOKEN_IDENT) {
698 char *ident = strdup(tok->u.s);
702 isl_stream_push_token(s, tok);
706 int isl_stream_eat(struct isl_stream *s, int type)
708 struct isl_token *tok;
710 tok = isl_stream_next_token(s);
713 if (tok->type == type) {
717 isl_stream_error(s, tok, "expecting other token");
718 isl_stream_push_token(s, tok);
722 int isl_stream_is_empty(struct isl_stream *s)
724 struct isl_token *tok;
726 tok = isl_stream_next_token(s);
731 isl_stream_push_token(s, tok);
735 static int free_keyword(void **p, void *user)
737 struct isl_keyword *keyword = *p;
745 void isl_stream_flush_tokens(struct isl_stream *s)
751 for (i = 0; i < s->n_token; ++i)
752 isl_token_free(s->tokens[i]);
756 void isl_stream_free(struct isl_stream *s)
761 if (s->n_token != 0) {
762 struct isl_token *tok = isl_stream_next_token(s);
763 isl_stream_error(s, tok, "unexpected token");
767 isl_hash_table_foreach(s->ctx, s->keywords, &free_keyword, NULL);
768 isl_hash_table_free(s->ctx, s->keywords);
770 isl_ctx_deref(s->ctx);