/
symbol.c
1195 lines (1037 loc) · 25.6 KB
/
symbol.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**********************************************************************
symbol.h -
$Author$
created at: Tue Jul 8 15:49:54 JST 2014
Copyright (C) 2014 Yukihiro Matsumoto
**********************************************************************/
#include "ruby/encoding.h"
#include "ruby/st.h"
#include "internal.h"
#include "symbol.h"
#include "gc.h"
#include "probes.h"
#ifndef SYMBOL_DEBUG
# define SYMBOL_DEBUG 0
#endif
#ifndef CHECK_ID_SERIAL
# define CHECK_ID_SERIAL SYMBOL_DEBUG
#endif
#define SYMBOL_PINNED_P(sym) (RSYMBOL(sym)->id&~ID_SCOPE_MASK)
#define STATIC_SYM2ID(sym) RSHIFT((unsigned long)(sym), RUBY_SPECIAL_SHIFT)
static ID register_static_symid(ID, const char *, long, rb_encoding *);
static ID register_static_symid_str(ID, VALUE);
#define REGISTER_SYMID(id, name) register_static_symid((id), (name), strlen(name), enc)
#include "id.c"
#define is_identchar(p,e,enc) (ISALNUM((unsigned char)*(p)) || (*(p)) == '_' || !ISASCII(*(p)))
#define op_tbl_count numberof(op_tbl)
STATIC_ASSERT(op_tbl_name_size, sizeof(op_tbl[0].name) == 3);
#define op_tbl_len(i) (!op_tbl[i].name[1] ? 1 : !op_tbl[i].name[2] ? 2 : 3)
static void
Init_op_tbl(void)
{
int i;
rb_encoding *const enc = rb_usascii_encoding();
for (i = '!'; i <= '~'; ++i) {
if (!ISALNUM(i) && i != '_') {
char c = (char)i;
register_static_symid(i, &c, 1, enc);
}
}
for (i = 0; i < op_tbl_count; ++i) {
register_static_symid(op_tbl[i].token, op_tbl[i].name, op_tbl_len(i), enc);
}
}
static const int ID_ENTRY_UNIT = 512;
enum id_entry_type {
ID_ENTRY_STR,
ID_ENTRY_SYM,
ID_ENTRY_SIZE
};
static struct symbols {
rb_id_serial_t last_id;
st_table *str_sym;
VALUE ids;
VALUE dsymbol_fstr_hash;
} global_symbols = {tNEXT_ID-1};
static const struct st_hash_type symhash = {
rb_str_hash_cmp,
rb_str_hash,
};
void
Init_sym(void)
{
VALUE dsym_fstrs = rb_ident_hash_new();
global_symbols.dsymbol_fstr_hash = dsym_fstrs;
rb_gc_register_mark_object(dsym_fstrs);
rb_obj_hide(dsym_fstrs);
global_symbols.str_sym = st_init_table_with_size(&symhash, 1000);
global_symbols.ids = rb_ary_tmp_new(0);
rb_gc_register_mark_object(global_symbols.ids);
Init_op_tbl();
Init_id();
}
WARN_UNUSED_RESULT(static VALUE dsymbol_alloc(const VALUE klass, const VALUE str, rb_encoding *const enc, const ID type));
WARN_UNUSED_RESULT(static VALUE dsymbol_check(const VALUE sym));
WARN_UNUSED_RESULT(static ID lookup_str_id(VALUE str));
WARN_UNUSED_RESULT(static VALUE lookup_str_sym(const VALUE str));
WARN_UNUSED_RESULT(static VALUE lookup_id_str(ID id));
WARN_UNUSED_RESULT(static ID attrsetname_to_attr(VALUE name));
WARN_UNUSED_RESULT(static ID attrsetname_to_attr_id(VALUE name));
WARN_UNUSED_RESULT(static ID intern_str(VALUE str, int mutable));
ID
rb_id_attrset(ID id)
{
VALUE str, sym;
int scope;
if (!is_notop_id(id)) {
switch (id) {
case tAREF: case tASET:
return tASET; /* only exception */
}
rb_name_error(id, "cannot make operator ID :%"PRIsVALUE" attrset",
rb_id2str(id));
}
else {
scope = id_type(id);
switch (scope) {
case ID_LOCAL: case ID_INSTANCE: case ID_GLOBAL:
case ID_CONST: case ID_CLASS: case ID_JUNK:
break;
case ID_ATTRSET:
return id;
default:
{
if ((str = lookup_id_str(id)) != 0) {
rb_name_error(id, "cannot make unknown type ID %d:%"PRIsVALUE" attrset",
scope, str);
}
else {
rb_name_error_str(Qnil, "cannot make unknown type anonymous ID %d:%"PRIxVALUE" attrset",
scope, (VALUE)id);
}
}
}
}
/* make new symbol and ID */
if (!(str = lookup_id_str(id))) {
static const char id_types[][8] = {
"local",
"instance",
"invalid",
"global",
"attrset",
"const",
"class",
"junk",
};
rb_name_error(id, "cannot make anonymous %.*s ID %"PRIxVALUE" attrset",
(int)sizeof(id_types[0]), id_types[scope], (VALUE)id);
}
str = rb_str_dup(str);
rb_str_cat(str, "=", 1);
sym = lookup_str_sym(str);
id = sym ? rb_sym2id(sym) : intern_str(str, 1);
return id;
}
ID
rb_id_attrget(ID id)
{
return attrsetname_to_attr(rb_id2str(id));
}
static int
is_special_global_name(const char *m, const char *e, rb_encoding *enc)
{
int mb = 0;
if (m >= e) return 0;
if (is_global_name_punct(*m)) {
++m;
}
else if (*m == '-') {
if (++m >= e) return 0;
if (is_identchar(m, e, enc)) {
if (!ISASCII(*m)) mb = 1;
m += rb_enc_mbclen(m, e, enc);
}
}
else {
if (!ISDIGIT(*m)) return 0;
do {
if (!ISASCII(*m)) mb = 1;
++m;
} while (m < e && ISDIGIT(*m));
}
return m == e ? mb + 1 : 0;
}
int
rb_symname_p(const char *name)
{
return rb_enc_symname_p(name, rb_ascii8bit_encoding());
}
int
rb_enc_symname_p(const char *name, rb_encoding *enc)
{
return rb_enc_symname2_p(name, strlen(name), enc);
}
static int
rb_sym_constant_char_p(const char *name, long nlen, rb_encoding *enc)
{
int c, len;
const char *end = name + nlen;
if (nlen < 1) return FALSE;
if (ISASCII(*name)) return ISUPPER(*name);
c = rb_enc_precise_mbclen(name, end, enc);
if (!MBCLEN_CHARFOUND_P(c)) return FALSE;
len = MBCLEN_CHARFOUND_LEN(c);
c = rb_enc_mbc_to_codepoint(name, end, enc);
if (ONIGENC_IS_UNICODE(enc)) {
static int ctype_titlecase = 0;
if (rb_enc_isupper(c, enc)) return TRUE;
if (rb_enc_islower(c, enc)) return FALSE;
if (!ctype_titlecase) {
static const UChar cname[] = "titlecaseletter";
static const UChar *const end = cname + sizeof(cname) - 1;
ctype_titlecase = ONIGENC_PROPERTY_NAME_TO_CTYPE(enc, cname, end);
}
if (rb_enc_isctype(c, ctype_titlecase, enc)) return TRUE;
}
else {
/* fallback to case-folding */
OnigUChar fold[ONIGENC_GET_CASE_FOLD_CODES_MAX_NUM];
const OnigUChar *beg = (const OnigUChar *)name;
int r = enc->mbc_case_fold(ONIGENC_CASE_FOLD,
&beg, (const OnigUChar *)end,
fold, enc);
if (r > 0 && (r != len || memcmp(fold, name, r)))
return TRUE;
}
return FALSE;
}
#define IDSET_ATTRSET_FOR_SYNTAX ((1U<<ID_LOCAL)|(1U<<ID_CONST))
#define IDSET_ATTRSET_FOR_INTERN (~(~0U<<(1<<ID_SCOPE_SHIFT)) & ~(1U<<ID_ATTRSET))
int
rb_enc_symname_type(const char *name, long len, rb_encoding *enc, unsigned int allowed_attrset)
{
const char *m = name;
const char *e = m + len;
int type = ID_JUNK;
if (!rb_enc_asciicompat(enc)) return -1;
if (!m || len <= 0) return -1;
switch (*m) {
case '\0':
return -1;
case '$':
type = ID_GLOBAL;
if (is_special_global_name(++m, e, enc)) return type;
goto id;
case '@':
type = ID_INSTANCE;
if (*++m == '@') {
++m;
type = ID_CLASS;
}
goto id;
case '<':
switch (*++m) {
case '<': ++m; break;
case '=': if (*++m == '>') ++m; break;
default: break;
}
break;
case '>':
switch (*++m) {
case '>': case '=': ++m; break;
}
break;
case '=':
switch (*++m) {
case '~': ++m; break;
case '=': if (*++m == '=') ++m; break;
default: return -1;
}
break;
case '*':
if (*++m == '*') ++m;
break;
case '+': case '-':
if (*++m == '@') ++m;
break;
case '|': case '^': case '&': case '/': case '%': case '~': case '`':
++m;
break;
case '[':
if (m[1] != ']') goto id;
++m;
if (*++m == '=') ++m;
break;
case '!':
if (len == 1) return ID_JUNK;
switch (*++m) {
case '=': case '~': ++m; break;
default:
if (allowed_attrset & (1U << ID_JUNK)) goto id;
return -1;
}
break;
default:
type = rb_sym_constant_char_p(m, e-m, enc) ? ID_CONST : ID_LOCAL;
id:
if (m >= e || (*m != '_' && !ISALPHA(*m) && ISASCII(*m))) {
if (len > 1 && *(e-1) == '=') {
type = rb_enc_symname_type(name, len-1, enc, allowed_attrset);
if (type != ID_ATTRSET) return ID_ATTRSET;
}
return -1;
}
while (m < e && is_identchar(m, e, enc)) m += rb_enc_mbclen(m, e, enc);
if (m >= e) break;
switch (*m) {
case '!': case '?':
if (type == ID_GLOBAL || type == ID_CLASS || type == ID_INSTANCE) return -1;
type = ID_JUNK;
++m;
if (m + 1 < e || *m != '=') break;
/* fall through */
case '=':
if (!(allowed_attrset & (1U << type))) return -1;
type = ID_ATTRSET;
++m;
break;
}
break;
}
return m == e ? type : -1;
}
int
rb_enc_symname2_p(const char *name, long len, rb_encoding *enc)
{
return rb_enc_symname_type(name, len, enc, IDSET_ATTRSET_FOR_SYNTAX) != -1;
}
static int
rb_str_symname_type(VALUE name, unsigned int allowed_attrset)
{
const char *ptr = StringValuePtr(name);
long len = RSTRING_LEN(name);
int type = rb_enc_symname_type(ptr, len, rb_enc_get(name), allowed_attrset);
RB_GC_GUARD(name);
return type;
}
static void
set_id_entry(rb_id_serial_t num, VALUE str, VALUE sym)
{
size_t idx = num / ID_ENTRY_UNIT;
VALUE ary, ids = global_symbols.ids;
if (idx >= (size_t)RARRAY_LEN(ids) || NIL_P(ary = rb_ary_entry(ids, (long)idx))) {
ary = rb_ary_tmp_new(ID_ENTRY_UNIT * ID_ENTRY_SIZE);
rb_ary_store(ids, (long)idx, ary);
}
idx = (num % ID_ENTRY_UNIT) * ID_ENTRY_SIZE;
rb_ary_store(ary, (long)idx + ID_ENTRY_STR, str);
rb_ary_store(ary, (long)idx + ID_ENTRY_SYM, sym);
}
static VALUE
get_id_serial_entry(rb_id_serial_t num, ID id, const enum id_entry_type t)
{
if (num && num <= global_symbols.last_id) {
size_t idx = num / ID_ENTRY_UNIT;
VALUE ids = global_symbols.ids;
VALUE ary;
if (idx < (size_t)RARRAY_LEN(ids) && !NIL_P(ary = rb_ary_entry(ids, (long)idx))) {
long pos = (long)(num % ID_ENTRY_UNIT) * ID_ENTRY_SIZE;
VALUE result = rb_ary_entry(ary, pos + t);
if (NIL_P(result)) return 0;
#if CHECK_ID_SERIAL
if (id) {
VALUE sym = result;
if (t != ID_ENTRY_SYM)
sym = rb_ary_entry(ary, pos + ID_ENTRY_SYM);
if (STATIC_SYM_P(sym)) {
if (STATIC_SYM2ID(sym) != id) return 0;
}
else {
if (RSYMBOL(sym)->id != id) return 0;
}
}
#endif
return result;
}
}
return 0;
}
static VALUE
get_id_entry(ID id, const enum id_entry_type t)
{
return get_id_serial_entry(rb_id_to_serial(id), id, t);
}
static inline ID
#ifdef __GNUC__
__attribute__((unused))
#endif
rb_id_serial_to_id(rb_id_serial_t num)
{
if (is_notop_id((ID)num)) {
VALUE sym = get_id_serial_entry(num, 0, ID_ENTRY_SYM);
return SYM2ID(sym);
}
else {
return (ID)num;
}
}
#if SYMBOL_DEBUG
static int
register_sym_update_callback(st_data_t *key, st_data_t *value, st_data_t arg, int existing)
{
if (existing) {
rb_fatal("symbol :% "PRIsVALUE" is already registered with %"PRIxVALUE,
(VALUE)*key, (VALUE)*value);
}
*value = arg;
return ST_CONTINUE;
}
#endif
static void
register_sym(VALUE str, VALUE sym)
{
#if SYMBOL_DEBUG
st_update(global_symbols.str_sym, (st_data_t)str,
register_sym_update_callback, (st_data_t)sym);
#else
st_add_direct(global_symbols.str_sym, (st_data_t)str, (st_data_t)sym);
#endif
}
static void
unregister_sym(VALUE str, VALUE sym)
{
st_data_t str_data = (st_data_t)str;
if (!st_delete(global_symbols.str_sym, &str_data, NULL)) {
rb_bug("%p can't remove str from str_id (%s)", (void *)sym, RSTRING_PTR(str));
}
}
static ID
register_static_symid(ID id, const char *name, long len, rb_encoding *enc)
{
VALUE str = rb_enc_str_new(name, len, enc);
return register_static_symid_str(id, str);
}
static ID
register_static_symid_str(ID id, VALUE str)
{
rb_id_serial_t num = rb_id_to_serial(id);
VALUE sym = STATIC_ID2SYM(id);
OBJ_FREEZE(str);
str = rb_fstring(str);
RUBY_DTRACE_CREATE_HOOK(SYMBOL, RSTRING_PTR(str));
register_sym(str, sym);
set_id_entry(num, str, sym);
return id;
}
static int
sym_check_asciionly(VALUE str)
{
if (!rb_enc_asciicompat(rb_enc_get(str))) return FALSE;
switch (rb_enc_str_coderange(str)) {
case ENC_CODERANGE_BROKEN:
rb_raise(rb_eEncodingError, "invalid symbol in encoding %s :%+"PRIsVALUE,
rb_enc_name(rb_enc_get(str)), str);
case ENC_CODERANGE_7BIT:
return TRUE;
}
return FALSE;
}
#if 0
/*
* _str_ itself will be registered at the global symbol table. _str_
* can be modified before the registration, since the encoding will be
* set to ASCII-8BIT if it is a special global name.
*/
static inline void
must_be_dynamic_symbol(VALUE x)
{
if (UNLIKELY(!DYNAMIC_SYM_P(x))) {
if (STATIC_SYM_P(x)) {
VALUE str = lookup_id_str(RSHIFT((unsigned long)(x),RUBY_SPECIAL_SHIFT));
if (str) {
rb_bug("wrong argument: %s (inappropriate Symbol)", RSTRING_PTR(str));
}
else {
rb_bug("wrong argument: inappropriate Symbol (%p)", (void *)x);
}
}
else {
rb_bug("wrong argument type %s (expected Symbol)", rb_builtin_class_name(x));
}
}
}
#endif
static VALUE
dsymbol_alloc(const VALUE klass, const VALUE str, rb_encoding * const enc, const ID type)
{
const VALUE dsym = rb_newobj_of(klass, T_SYMBOL | FL_WB_PROTECTED);
long hashval;
rb_enc_set_index(dsym, rb_enc_to_index(enc));
OBJ_FREEZE(dsym);
RB_OBJ_WRITE(dsym, &RSYMBOL(dsym)->fstr, str);
RSYMBOL(dsym)->id = type;
/* we want hashval to be in Fixnum range [ruby-core:15713] r15672 */
hashval = (long)rb_str_hash(str);
RSYMBOL(dsym)->hashval = RSHIFT((long)hashval, 1);
register_sym(str, dsym);
rb_hash_aset(global_symbols.dsymbol_fstr_hash, str, Qtrue);
RUBY_DTRACE_CREATE_HOOK(SYMBOL, RSTRING_PTR(RSYMBOL(dsym)->fstr));
return dsym;
}
static inline VALUE
dsymbol_check(const VALUE sym)
{
if (UNLIKELY(rb_objspace_garbage_object_p(sym))) {
const VALUE fstr = RSYMBOL(sym)->fstr;
const ID type = RSYMBOL(sym)->id & ID_SCOPE_MASK;
RSYMBOL(sym)->fstr = 0;
unregister_sym(fstr, sym);
return dsymbol_alloc(rb_cSymbol, fstr, rb_enc_get(fstr), type);
}
else {
return sym;
}
}
static ID
lookup_str_id(VALUE str)
{
st_data_t sym_data;
if (st_lookup(global_symbols.str_sym, (st_data_t)str, &sym_data)) {
const VALUE sym = (VALUE)sym_data;
if (STATIC_SYM_P(sym)) {
return STATIC_SYM2ID(sym);
}
else if (DYNAMIC_SYM_P(sym)) {
ID id = RSYMBOL(sym)->id;
if (id & ~ID_SCOPE_MASK) return id;
}
else {
rb_bug("non-symbol object %s:%"PRIxVALUE" for %"PRIsVALUE" in symbol table",
rb_builtin_class_name(sym), sym, str);
}
}
return (ID)0;
}
static VALUE
lookup_str_sym(const VALUE str)
{
st_data_t sym_data;
if (st_lookup(global_symbols.str_sym, (st_data_t)str, &sym_data)) {
VALUE sym = (VALUE)sym_data;
if (DYNAMIC_SYM_P(sym)) {
sym = dsymbol_check(sym);
}
return sym;
}
else {
return (VALUE)0;
}
}
static VALUE
lookup_id_str(ID id)
{
return get_id_entry(id, ID_ENTRY_STR);
}
ID
rb_intern3(const char *name, long len, rb_encoding *enc)
{
VALUE sym;
struct RString fake_str;
VALUE str = rb_setup_fake_str(&fake_str, name, len, enc);
OBJ_FREEZE(str);
sym = lookup_str_sym(str);
if (sym) return rb_sym2id(sym);
str = rb_enc_str_new(name, len, enc); /* make true string */
return intern_str(str, 1);
}
static ID
next_id_base(void)
{
rb_id_serial_t next_serial = global_symbols.last_id + 1;
if (next_serial == 0) {
return (ID)-1;
}
else {
const size_t num = ++global_symbols.last_id;
return num << ID_SCOPE_SHIFT;
}
}
static ID
intern_str(VALUE str, int mutable)
{
ID id;
ID nid;
id = rb_str_symname_type(str, IDSET_ATTRSET_FOR_INTERN);
if (id == (ID)-1) id = ID_JUNK;
if (sym_check_asciionly(str)) {
if (!mutable) str = rb_str_dup(str);
rb_enc_associate(str, rb_usascii_encoding());
}
if ((nid = next_id_base()) == (ID)-1) {
str = rb_str_ellipsize(str, 20);
rb_raise(rb_eRuntimeError, "symbol table overflow (symbol %"PRIsVALUE")",
str);
}
id |= nid;
id |= ID_STATIC_SYM;
return register_static_symid_str(id, str);
}
ID
rb_intern2(const char *name, long len)
{
return rb_intern3(name, len, rb_usascii_encoding());
}
#undef rb_intern
ID
rb_intern(const char *name)
{
return rb_intern2(name, strlen(name));
}
ID
rb_intern_str(VALUE str)
{
VALUE sym = lookup_str_sym(str);
if (sym) {
return SYM2ID(sym);
}
return intern_str(str, 0);
}
void
rb_gc_free_dsymbol(VALUE sym)
{
VALUE str = RSYMBOL(sym)->fstr;
if (str) {
RSYMBOL(sym)->fstr = 0;
unregister_sym(str, sym);
rb_hash_delete_entry(global_symbols.dsymbol_fstr_hash, str);
}
}
/*
* call-seq:
* str.intern -> symbol
* str.to_sym -> symbol
*
* Returns the <code>Symbol</code> corresponding to <i>str</i>, creating the
* symbol if it did not previously exist. See <code>Symbol#id2name</code>.
*
* "Koala".intern #=> :Koala
* s = 'cat'.to_sym #=> :cat
* s == :cat #=> true
* s = '@cat'.to_sym #=> :@cat
* s == :@cat #=> true
*
* This can also be used to create symbols that cannot be represented using the
* <code>:xxx</code> notation.
*
* 'cat and dog'.to_sym #=> :"cat and dog"
*/
VALUE
rb_str_intern(VALUE str)
{
#if USE_SYMBOL_GC
rb_encoding *enc, *ascii;
int type;
#else
ID id;
#endif
VALUE sym = lookup_str_sym(str);
if (sym) {
return sym;
}
#if USE_SYMBOL_GC
enc = rb_enc_get(str);
ascii = rb_usascii_encoding();
if (enc != ascii && sym_check_asciionly(str)) {
str = rb_str_dup(str);
rb_enc_associate(str, ascii);
OBJ_FREEZE(str);
enc = ascii;
}
else {
str = rb_str_dup(str);
OBJ_FREEZE(str);
}
str = rb_fstring(str);
type = rb_str_symname_type(str, IDSET_ATTRSET_FOR_INTERN);
if (type < 0) type = ID_JUNK;
return dsymbol_alloc(rb_cSymbol, str, enc, type);
#else
id = intern_str(str, 0);
return ID2SYM(id);
#endif
}
ID
rb_sym2id(VALUE sym)
{
ID id;
if (STATIC_SYM_P(sym)) {
id = STATIC_SYM2ID(sym);
}
else if (DYNAMIC_SYM_P(sym)) {
sym = dsymbol_check(sym);
id = RSYMBOL(sym)->id;
if (UNLIKELY(!(id & ~ID_SCOPE_MASK))) {
VALUE fstr = RSYMBOL(sym)->fstr;
ID num = next_id_base();
RSYMBOL(sym)->id = id |= num;
/* make it permanent object */
set_id_entry(rb_id_to_serial(num), fstr, sym);
rb_hash_delete_entry(global_symbols.dsymbol_fstr_hash, fstr);
}
}
else {
rb_raise(rb_eTypeError, "wrong argument type %s (expected Symbol)",
rb_builtin_class_name(sym));
}
return id;
}
#undef rb_id2sym
VALUE
rb_id2sym(ID x)
{
if (!DYNAMIC_ID_P(x)) return STATIC_ID2SYM(x);
return get_id_entry(x, ID_ENTRY_SYM);
}
VALUE
rb_sym2str(VALUE sym)
{
if (DYNAMIC_SYM_P(sym)) {
return RSYMBOL(sym)->fstr;
}
else {
return rb_id2str(STATIC_SYM2ID(sym));
}
}
VALUE
rb_id2str(ID id)
{
return lookup_id_str(id);
}
const char *
rb_id2name(ID id)
{
VALUE str = rb_id2str(id);
if (!str) return 0;
return RSTRING_PTR(str);
}
ID
rb_make_internal_id(void)
{
return next_id_base() | ID_INTERNAL | ID_STATIC_SYM;
}
static int
symbols_i(st_data_t key, st_data_t value, st_data_t arg)
{
VALUE ary = (VALUE)arg;
VALUE sym = (VALUE)value;
if (STATIC_SYM_P(sym)) {
rb_ary_push(ary, sym);
return ST_CONTINUE;
}
else if (!DYNAMIC_SYM_P(sym)) {
rb_bug("invalid symbol: %s", RSTRING_PTR((VALUE)key));
}
else if (!SYMBOL_PINNED_P(sym) && rb_objspace_garbage_object_p(sym)) {
RSYMBOL(sym)->fstr = 0;
return ST_DELETE;
}
else {
rb_ary_push(ary, sym);
return ST_CONTINUE;
}
}
/*
* call-seq:
* Symbol.all_symbols => array
*
* Returns an array of all the symbols currently in Ruby's symbol
* table.
*
* Symbol.all_symbols.size #=> 903
* Symbol.all_symbols[1,20] #=> [:floor, :ARGV, :Binding, :symlink,
* :chown, :EOFError, :$;, :String,
* :LOCK_SH, :"setuid?", :$<,
* :default_proc, :compact, :extend,
* :Tms, :getwd, :$=, :ThreadGroup,
* :wait2, :$>]
*/
VALUE
rb_sym_all_symbols(void)
{
VALUE ary = rb_ary_new2(global_symbols.str_sym->num_entries);
st_foreach(global_symbols.str_sym, symbols_i, ary);
return ary;
}
size_t
rb_sym_immortal_count(void)
{
return (size_t)global_symbols.last_id;
}
int
rb_is_const_id(ID id)
{
return is_const_id(id);
}
int
rb_is_class_id(ID id)
{
return is_class_id(id);
}
int
rb_is_global_id(ID id)
{
return is_global_id(id);
}
int
rb_is_instance_id(ID id)
{
return is_instance_id(id);
}
int
rb_is_attrset_id(ID id)
{
return is_attrset_id(id);
}
int
rb_is_local_id(ID id)
{
return is_local_id(id);
}
int
rb_is_junk_id(ID id)
{
return is_junk_id(id);
}
int
rb_is_const_sym(VALUE sym)
{
return is_const_sym(sym);
}
int
rb_is_class_sym(VALUE sym)
{
return is_class_sym(sym);
}
int
rb_is_global_sym(VALUE sym)
{
return is_global_sym(sym);
}
int
rb_is_instance_sym(VALUE sym)
{
return is_instance_sym(sym);
}
int
rb_is_attrset_sym(VALUE sym)
{
return is_attrset_sym(sym);
}
int
rb_is_local_sym(VALUE sym)
{
return is_local_sym(sym);
}
int
rb_is_junk_sym(VALUE sym)
{
return is_junk_sym(sym);
}
/**
* Returns ID for the given name if it is interned already, or 0.
*
* \param namep the pointer to the name object
* \return the ID for *namep
* \pre the object referred by \p namep must be a Symbol or
* a String, or possible to convert with to_str method.
* \post the object referred by \p namep is a Symbol or a
* String if non-zero value is returned, or is a String
* if 0 is returned.
*/
ID
rb_check_id(volatile VALUE *namep)
{
VALUE tmp;
VALUE name = *namep;
if (STATIC_SYM_P(name)) {
return STATIC_SYM2ID(name);
}
else if (DYNAMIC_SYM_P(name)) {
if (SYMBOL_PINNED_P(name)) {
return RSYMBOL(name)->id;
}
else {
*namep = RSYMBOL(name)->fstr;
return 0;
}
}
else if (!RB_TYPE_P(name, T_STRING)) {
tmp = rb_check_string_type(name);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "%+"PRIsVALUE" is not a symbol nor a string",
name);
}
name = tmp;