-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathjsarray.c
More file actions
1298 lines (1178 loc) · 31.1 KB
/
jsarray.c
File metadata and controls
1298 lines (1178 loc) · 31.1 KB
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
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* JS array class.
*/
#include "jsstddef.h"
#include <stdlib.h>
#include <string.h>
#include "jstypes.h"
#include "jsutil.h" /* Added by JSIFY */
#include "jsapi.h"
#include "jsarray.h"
#include "jsatom.h"
#include "jscntxt.h"
#include "jsconfig.h"
#include "jsfun.h"
#include "jsgc.h"
#include "jsinterp.h"
#include "jslock.h"
#include "jsnum.h"
#include "jsobj.h"
#include "jsstr.h"
/* 2^32 - 1 as a number and a string */
#define MAXINDEX 4294967295u
#define MAXSTR "4294967295"
/*
* Determine if the id represents an array index.
*
* An id is an array index according to ECMA by (15.4):
*
* "Array objects give special treatment to a certain class of property names.
* A property name P (in the form of a string value) is an array index if and
* only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal
* to 2^32-1."
*
* In our implementation, it would be sufficient to check for JSVAL_IS_INT(id)
* except that by using signed 32-bit integers we miss the top half of the
* valid range. This function checks the string representation itself; note
* that calling a standard conversion routine might allow strings such as
* "08" or "4.0" as array indices, which they are not.
*/
static JSBool
IdIsIndex(jsid id, jsuint *indexp)
{
JSString *str;
jschar *cp;
if (JSVAL_IS_INT(id)) {
jsint i;
i = JSVAL_TO_INT(id);
if (i < 0)
return JS_FALSE;
*indexp = (jsuint)i;
return JS_TRUE;
}
/* It must be a string. */
str = JSVAL_TO_STRING(id);
cp = str->chars;
if (JS7_ISDEC(*cp) && str->length < sizeof(MAXSTR)) {
jsuint index = JS7_UNDEC(*cp++);
jsuint oldIndex = 0;
jsint c = 0;
if (index != 0) {
while (JS7_ISDEC(*cp)) {
oldIndex = index;
c = JS7_UNDEC(*cp);
index = 10*index + c;
cp++;
}
}
/* Make sure all characters were consumed and that it couldn't
* have overflowed.
*/
if (*cp == 0 &&
(oldIndex < (MAXINDEX / 10) ||
(oldIndex == (MAXINDEX / 10) && c < (MAXINDEX % 10))))
{
*indexp = index;
return JS_TRUE;
}
}
return JS_FALSE;
}
static JSBool
ValueIsLength(JSContext *cx, jsval v, jsuint *lengthp)
{
jsint i;
/*
* It's only an array length if it's an int or a double. Some relevant
* ECMA language is 15.4.2.2 - 'If the argument len is a number, then the
* length property of the newly constructed object is set to ToUint32(len)
* - I take 'is a number' to mean 'typeof len' returns 'number' in
* javascript.
*/
if (JSVAL_IS_INT(v)) {
i = JSVAL_TO_INT(v);
/* jsuint cast does ToUint32 */
if (lengthp)
*lengthp = (jsuint) i;
return JS_TRUE;
}
if (JSVAL_IS_DOUBLE(v)) {
/*
* XXXmccabe I'd love to add another check here, against
* js_DoubleToInteger(d) != d), so that ValueIsLength matches
* IdIsIndex, but it doesn't seem to follow from ECMA.
* (seems to be appropriate for IdIsIndex, though).
*/
return js_ValueToECMAUint32(cx, v, (uint32 *)lengthp);
}
return JS_FALSE;
}
static JSBool
ValueToIndex(JSContext *cx, jsval v, jsuint *lengthp)
{
jsint i;
if (JSVAL_IS_INT(v)) {
i = JSVAL_TO_INT(v);
/* jsuint cast does ToUint32. */
if (lengthp)
*lengthp = (jsuint)i;
return JS_TRUE;
}
return js_ValueToECMAUint32(cx, v, (uint32 *)lengthp);
}
JSBool
js_GetLengthProperty(JSContext *cx, JSObject *obj, jsuint *lengthp)
{
jsid id;
jsint i;
jsval v;
id = (jsid) cx->runtime->atomState.lengthAtom;
if (!OBJ_GET_PROPERTY(cx, obj, id, &v))
return JS_FALSE;
/* Short-circuit, because js_ValueToECMAUint32 fails when
* called during init time.
*/
if (JSVAL_IS_INT(v)) {
i = JSVAL_TO_INT(v);
/* jsuint cast does ToUint32. */
*lengthp = (jsuint)i;
return JS_TRUE;
}
return js_ValueToECMAUint32(cx, v, (uint32 *)lengthp);
}
static JSBool
IndexToValue(JSContext *cx, jsuint length, jsval *vp)
{
if (length <= JSVAL_INT_MAX) {
*vp = INT_TO_JSVAL(length);
return JS_TRUE;
}
return js_NewDoubleValue(cx, (jsdouble)length, vp);
}
static JSBool
IndexToId(JSContext *cx, jsuint length, jsid *idp)
{
JSString *str;
JSAtom *atom;
if (length <= JSVAL_INT_MAX) {
*idp = (jsid) INT_TO_JSVAL(length);
} else {
str = js_NumberToString(cx, (jsdouble)length);
if (!str)
return JS_FALSE;
atom = js_AtomizeString(cx, str, 0);
if (!atom)
return JS_FALSE;
*idp = (jsid)atom;
}
return JS_TRUE;
}
JSBool
js_SetLengthProperty(JSContext *cx, JSObject *obj, jsuint length)
{
jsval v;
jsid id;
if (!IndexToValue(cx, length, &v))
return JS_FALSE;
id = (jsid) cx->runtime->atomState.lengthAtom;
return OBJ_SET_PROPERTY(cx, obj, id, &v);
}
JSBool
js_HasLengthProperty(JSContext *cx, JSObject *obj, jsuint *lengthp)
{
JSErrorReporter older;
jsid id;
JSBool ok;
jsval v;
older = JS_SetErrorReporter(cx, NULL);
id = (jsid) cx->runtime->atomState.lengthAtom;
ok = OBJ_GET_PROPERTY(cx, obj, id, &v);
JS_SetErrorReporter(cx, older);
if (!ok)
return JS_FALSE;
return ValueIsLength(cx, v, lengthp);
}
/*
* This get function is specific to Array.prototype.length and other array
* instance length properties. It calls back through the class get function
* in case some magic happens there (see call_getProperty in jsfun.c).
*/
static JSBool
array_length_getter(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
return OBJ_GET_CLASS(cx, obj)->getProperty(cx, obj, id, vp);
}
static JSBool
array_length_setter(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
jsuint newlen, oldlen, slot;
jsid id2;
jsval junk;
if (!ValueToIndex(cx, *vp, &newlen))
return JS_FALSE;
if (!js_GetLengthProperty(cx, obj, &oldlen))
return JS_FALSE;
for (slot = newlen; slot < oldlen; slot++) {
if (!IndexToId(cx, slot, &id2))
return JS_FALSE;
if (!OBJ_DELETE_PROPERTY(cx, obj, id2, &junk))
return JS_FALSE;
}
return IndexToValue(cx, newlen, vp);
}
static JSBool
array_addProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
jsuint index, length;
if (!(IdIsIndex(id, &index)))
return JS_TRUE;
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
if (index >= length) {
length = index + 1;
return js_SetLengthProperty(cx, obj, length);
}
return JS_TRUE;
}
static JSBool
array_convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
{
jsuint length;
if (cx->version == JSVERSION_1_2) {
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
switch (type) {
case JSTYPE_NUMBER:
return IndexToValue(cx, length, vp);
case JSTYPE_BOOLEAN:
*vp = BOOLEAN_TO_JSVAL(length > 0);
return JS_TRUE;
default:
return JS_TRUE;
}
}
return js_TryValueOf(cx, obj, type, vp);
}
JSClass js_ArrayClass = {
"Array",
0,
array_addProperty, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub, array_convert, JS_FinalizeStub
};
static JSBool
array_join_sub(JSContext *cx, JSObject *obj, JSString *sep, JSBool literalize,
jsval *rval)
{
JSBool ok;
jsval v;
jsuint length, index;
jschar *chars, *ochars;
size_t nchars, growth, seplen;
const jschar *sepstr;
JSString *str;
JSHashEntry *he;
ok = js_GetLengthProperty(cx, obj, &length);
if (!ok)
return JS_FALSE;
ok = JS_TRUE;
if (literalize) {
he = js_EnterSharpObject(cx, obj, NULL, &chars);
if (!he)
return JS_FALSE;
if (IS_SHARP(he)) {
#if JS_HAS_SHARP_VARS
nchars = js_strlen(chars);
#else
chars[0] = '[';
chars[1] = ']';
chars[2] = 0;
nchars = 2;
#endif
goto make_string;
}
/*
* Allocate 1 + 3 + 1 for "[", the worst-case closing ", ]", and the
* terminating 0.
*/
growth = (1 + 3 + 1) * sizeof(jschar);
if (!chars) {
nchars = 0;
chars = malloc(growth);
if (!chars)
goto done;
} else {
MAKE_SHARP(he);
nchars = js_strlen(chars);
chars = realloc((ochars = chars), nchars * sizeof(jschar) + growth);
if (!chars) {
free(ochars);
goto done;
}
}
chars[nchars++] = '[';
} else {
if (length == 0) {
*rval = JS_GetEmptyStringValue(cx);
return ok;
}
chars = NULL;
nchars = 0;
}
sepstr = NULL;
seplen = sep->length;
v = JSVAL_NULL;
for (index = 0; index < length; index++) {
ok = JS_GetElement(cx, obj, index, &v);
if (!ok)
goto done;
if (JSVAL_IS_VOID(v) || JSVAL_IS_NULL(v)) {
str = cx->runtime->emptyString;
} else {
str = (literalize ? js_ValueToSource : js_ValueToString)(cx, v);
if (!str) {
ok = JS_FALSE;
goto done;
}
}
/* Allocate 3 + 1 at end for ", ", closing bracket, and zero. */
growth = (nchars + (sepstr ? seplen : 0) +
str->length +
3 + 1) * sizeof(jschar);
if (!chars) {
chars = malloc(growth);
if (!chars)
goto done;
} else {
chars = realloc((ochars = chars), growth);
if (!chars) {
free(ochars);
goto done;
}
}
if (sepstr) {
js_strncpy(&chars[nchars], sepstr, seplen);
nchars += seplen;
}
sepstr = sep->chars;
js_strncpy(&chars[nchars], str->chars, str->length);
nchars += str->length;
}
done:
if (literalize) {
if (chars) {
if (JSVAL_IS_VOID(v)) {
chars[nchars++] = ',';
chars[nchars++] = ' ';
}
chars[nchars++] = ']';
}
js_LeaveSharpObject(cx, NULL);
}
if (!ok) {
if (chars)
free(chars);
return ok;
}
make_string:
if (!chars) {
JS_ReportOutOfMemory(cx);
return JS_FALSE;
}
chars[nchars] = 0;
str = js_NewString(cx, chars, nchars, 0);
if (!str) {
free(chars);
return JS_FALSE;
}
*rval = STRING_TO_JSVAL(str);
return JS_TRUE;
}
static jschar comma_space_ucstr[] = {',', ' ', 0};
static jschar comma_ucstr[] = {',', 0};
static JSString comma_space = {2, comma_space_ucstr};
static JSString comma = {1, comma_ucstr};
#if JS_HAS_TOSOURCE
static JSBool
array_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
return array_join_sub(cx, obj, &comma_space, JS_TRUE, rval);
}
#endif
static JSBool
array_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSBool literalize;
/*
* JS1.2 arrays convert to array literals, with a comma followed by a space
* between each element.
*/
literalize = (cx->version == JSVERSION_1_2);
return array_join_sub(cx, obj, literalize ? &comma_space : &comma,
literalize, rval);
}
static JSBool
array_join(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
JSString *str;
if (argc == 0)
return array_join_sub(cx, obj, &comma, JS_FALSE, rval);
str = js_ValueToString(cx, argv[0]);
if (!str)
return JS_FALSE;
argv[0] = STRING_TO_JSVAL(str);
return array_join_sub(cx, obj, str, JS_FALSE, rval);
}
#if !JS_HAS_MORE_PERL_FUN
static JSBool
array_nyi(JSContext *cx, const char *what)
{
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NO_PROTO, what);
return JS_FALSE;
}
#endif
static JSBool
InitArrayObject(JSContext *cx, JSObject *obj, jsuint length, jsval *vector)
{
jsval v;
jsid id;
jsuint index;
if (!IndexToValue(cx, length, &v))
return JS_FALSE;
id = (jsid) cx->runtime->atomState.lengthAtom;
if (!js_DefineProperty(cx, obj, id, v,
array_length_getter, array_length_setter,
JSPROP_PERMANENT,
NULL)) {
return JS_FALSE;
}
if (!vector)
return JS_TRUE;
for (index = 0; index < length; index++) {
if (!IndexToId(cx, index, &id))
return JS_FALSE;
if (!js_DefineProperty(cx, obj, id, vector[index],
JS_PropertyStub, JS_PropertyStub,
JSPROP_ENUMERATE,
NULL)) {
return JS_FALSE;
}
}
return JS_TRUE;
}
static JSBool
array_reverse(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
jsuint len, half, i;
jsid id, id2;
jsval v, v2;
if (!js_GetLengthProperty(cx, obj, &len))
return JS_FALSE;
half = len / 2;
for (i = 0; i < half; i++) {
if (!IndexToId(cx, i, &id))
return JS_FALSE;
if (!IndexToId(cx, len - i - 1, &id2))
return JS_FALSE;
if (!OBJ_GET_PROPERTY(cx, obj, id, &v))
return JS_FALSE;
if (!OBJ_GET_PROPERTY(cx, obj, id2, &v2))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id, &v2))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id2, &v))
return JS_FALSE;
}
*rval = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
typedef struct QSortArgs {
void *vec;
size_t elsize;
void *pivot;
JSComparator cmp;
void *arg;
} QSortArgs;
static void
js_qsort_r(QSortArgs *qa, int lo, int hi)
{
void *pivot, *a, *b;
int i, j;
pivot = qa->pivot;
while (lo < hi) {
i = lo;
j = hi;
a = (char *)qa->vec + i * qa->elsize;
memmove(pivot, a, qa->elsize);
while (i < j) {
for (;;) {
b = (char *)qa->vec + j * qa->elsize;
if ((*qa->cmp)(b, pivot, qa->arg) <= 0)
break;
j--;
}
memmove(a, b, qa->elsize);
while (i < j && (*qa->cmp)(a, pivot, qa->arg) <= 0) {
i++;
a = (char *)qa->vec + i * qa->elsize;
}
memmove(b, a, qa->elsize);
}
memmove(a, pivot, qa->elsize);
if (i - lo < hi - i) {
js_qsort_r(qa, lo, i - 1);
lo = i + 1;
} else {
js_qsort_r(qa, i + 1, hi);
hi = i - 1;
}
}
}
JSBool
js_qsort(void *vec, size_t nel, size_t elsize, JSComparator cmp, void *arg)
{
void *pivot;
QSortArgs qa;
pivot = malloc(elsize);
if (!pivot)
return JS_FALSE;
qa.vec = vec;
qa.elsize = elsize;
qa.pivot = pivot;
qa.cmp = cmp;
qa.arg = arg;
js_qsort_r(&qa, 0, (int)(nel - 1));
free(pivot);
return JS_TRUE;
}
typedef struct CompareArgs {
JSContext *context;
jsval fval;
JSBool status;
} CompareArgs;
static int
sort_compare(const void *a, const void *b, void *arg)
{
jsval av = *(const jsval *)a, bv = *(const jsval *)b;
CompareArgs *ca = arg;
JSContext *cx = ca->context;
jsdouble cmp = -1;
jsval fval, argv[2], rval;
JSBool ok;
fval = ca->fval;
if (fval == JSVAL_NULL) {
JSString *astr, *bstr;
if (av == bv) {
cmp = 0;
} else if (av == JSVAL_VOID || bv == JSVAL_VOID) {
/* Put undefined properties at the end. */
cmp = (av == JSVAL_VOID) ? 1 : -1;
} else if ((astr = js_ValueToString(cx, av)) != NULL &&
(bstr = js_ValueToString(cx, bv)) != NULL) {
cmp = js_CompareStrings(astr, bstr);
} else {
ca->status = JS_FALSE;
}
} else {
argv[0] = av;
argv[1] = bv;
ok = js_CallFunctionValue(cx,
OBJ_GET_PARENT(cx, JSVAL_TO_OBJECT(fval)),
fval, 2, argv, &rval);
if (ok) {
ok = js_ValueToNumber(cx, rval, &cmp);
/* Clamp cmp to -1, 0, 1. */
if (JSDOUBLE_IS_NaN(cmp)) {
/* XXX report some kind of error here? ECMA talks about
* 'consistent compare functions' that don't return NaN, but is
* silent about what the result should be. So we currently
* ignore it.
*/
cmp = 0;
} else if (cmp != 0) {
cmp = cmp > 0 ? 1 : -1;
}
} else {
ca->status = ok;
}
}
return (int)cmp;
}
/* XXXmccabe do the sort helper functions need to take int? (Or can we claim
* that 2^32 * 32 is too large to worry about?) Something dumps when I change
* to unsigned int; is qsort using -1 as a fencepost?
*/
static JSBool
array_sort(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
jsval fval;
CompareArgs ca;
jsuint len, i;
jsval *vec;
jsid id;
if (argc > 0) {
if (JSVAL_IS_PRIMITIVE(argv[0])) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL,
JSMSG_BAD_SORT_ARG);
return JS_FALSE;
}
fval = argv[0];
} else {
fval = JSVAL_NULL;
}
if (!js_GetLengthProperty(cx, obj, &len))
return JS_FALSE;
vec = JS_malloc(cx, (size_t) len * sizeof(jsval));
if (!vec)
return JS_FALSE;
for (i = 0; i < len; i++) {
ca.status = IndexToId(cx, i, &id);
if (!ca.status)
goto out;
ca.status = OBJ_GET_PROPERTY(cx, obj, id, &vec[i]);
if (!ca.status)
goto out;
}
ca.context = cx;
ca.fval = fval;
ca.status = JS_TRUE;
if (!js_qsort(vec, (size_t) len, sizeof(jsval), sort_compare, &ca)) {
JS_ReportOutOfMemory(cx);
ca.status = JS_FALSE;
}
if (ca.status) {
ca.status = InitArrayObject(cx, obj, len, vec);
if (ca.status)
*rval = OBJECT_TO_JSVAL(obj);
}
out:
if (vec)
JS_free(cx, vec);
return ca.status;
}
#ifdef NOTYET
/*
* From "Programming perl", Larry Wall and Randall L. Schwartz, Copyright XXX
* O'Reilly & Associates, Inc., but with Java primitive type sizes for i, l,
* and so on:
*
* a An ASCII string, will be null padded.
* A An ASCII string, will be space padded.
* b A bit string, low-to-high order.
* B A bit string, high-to-low order.
* h A hexadecimal string, low nybble first.
* H A hexadecimal string, high nybble first.
* c A signed char value.
* C An unsigned char value.
* s A signed short (16-bit) value.
* S An unsigned short (16-bit) value.
* i A signed integer (32-bit) value.
* I An unsigned integer (32-bit) value.
* l A signed long (64-bit) value.
* L An unsigned long (64-bit) value.
* n A short in "network" byte order.
* N An integer in "network" byte order.
* f A single-precision float in IEEE format.
* d A double-precision float in IEEE format.
* p A pointer to a string.
* x A null byte.
* X Back up one byte.
* @ Null-fill to absolute position.
* u A uuencoded string.
*
* Each letter may be followed by a number giving the repeat count. Together
* the letter and repeat count make a field specifier. Field specifiers may
* be separated by whitespace, which will be ignored.
*/
static JSBool
array_pack(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
#else
return array_nyi(cx, "pack");
#endif
}
#endif /* NOTYET */
static JSBool
array_push(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
jsuint length;
uintN i;
jsid id;
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
for (i = 0; i < argc; i++) {
if (!IndexToId(cx, length + i, &id))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id, &argv[i]))
return JS_FALSE;
}
/*
* If JS1.2, follow Perl4 by returning the last thing pushed. Otherwise,
* return the new array length.
*/
length += argc;
if (cx->version == JSVERSION_1_2) {
*rval = argc ? argv[argc-1] : JSVAL_VOID;
} else {
if (!IndexToValue(cx, length, rval))
return JS_FALSE;
}
return js_SetLengthProperty(cx, obj, length);
#else
return array_nyi(cx, "push");
#endif
}
static JSBool
array_pop(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
jsuint index;
jsid id;
jsval junk;
if (!js_GetLengthProperty(cx, obj, &index))
return JS_FALSE;
if (index > 0) {
index--;
if (!IndexToId(cx, index, &id))
return JS_FALSE;
/* Get the to-be-deleted property's value into rval. */
if (!OBJ_GET_PROPERTY(cx, obj, id, rval))
return JS_FALSE;
if (!OBJ_DELETE_PROPERTY(cx, obj, id, &junk))
return JS_FALSE;
}
return js_SetLengthProperty(cx, obj, index);
#else
return array_nyi(cx, "pop");
#endif
}
static JSBool
array_shift(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
jsuint length, i;
jsid id, id2;
jsval v, junk;
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
if (length > 0) {
length--;
id = JSVAL_ZERO;
/* Get the to-be-deleted property's value into rval ASAP. */
if (!OBJ_GET_PROPERTY(cx, obj, id, rval))
return JS_FALSE;
/*
* Slide down the array above the first element.
*/
if (length > 0) {
for (i = 1; i <= length; i++) {
if (!IndexToId(cx, i, &id))
return JS_FALSE;
if (!IndexToId(cx, i - 1, &id2))
return JS_FALSE;
if (!OBJ_GET_PROPERTY(cx, obj, id, &v))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id2, &v))
return JS_FALSE;
}
}
/* Delete the only or last element. */
if (!OBJ_DELETE_PROPERTY(cx, obj, id, &junk))
return JS_FALSE;
}
return js_SetLengthProperty(cx, obj, length);
#else
return array_nyi(cx, "shift");
#endif
}
static JSBool
array_unshift(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
jsuint length, last;
uintN i;
jsid id, id2;
jsval v;
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
if (argc > 0) {
/* Slide up the array to make room for argc at the bottom. */
if (length > 0) {
last = length;
while (last--) {
if (!IndexToId(cx, last, &id))
return JS_FALSE;
if (!IndexToId(cx, last + argc, &id2))
return JS_FALSE;
if (!OBJ_GET_PROPERTY(cx, obj, id, &v))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id2, &v))
return JS_FALSE;
}
}
/* Copy from argv to the bottom of the array. */
for (i = 0; i < argc; i++) {
if (!IndexToId(cx, i, &id))
return JS_FALSE;
if (!OBJ_SET_PROPERTY(cx, obj, id, &argv[i]))
return JS_FALSE;
}
/* Follow Perl by returning the new array length. */
length += argc;
if (!js_SetLengthProperty(cx, obj, length))
return JS_FALSE;
}
return IndexToValue(cx, length, rval);
#else
return array_nyi(cx, "unshift");
#endif
}
static JSBool
array_splice(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
#if JS_HAS_MORE_PERL_FUN
jsuint length, begin, end, count, delta, last;
uintN i;
jsdouble d;
jsid id, id2;
jsval v;
JSObject *obj2;
/* Nothing to do if no args. Otherwise lock and load length. */
if (argc == 0)
return JS_TRUE;
if (!js_GetLengthProperty(cx, obj, &length))
return JS_FALSE;
/* Convert the first argument into a starting index. */
if (!js_ValueToNumber(cx, *argv, &d))
return JS_FALSE;
d = js_DoubleToInteger(d);
if (d < 0) {
d += length;
if (d < 0)
d = 0;
} else if (d > length) {
d = length;
}
begin = (jsuint)d; /* d has been clamped to uint32 */
argc--;
argv++;
/* Convert the second argument from a count into a fencepost index. */
delta = length - begin;
if (argc == 0) {
count = delta;
end = length;
} else {
if (!js_ValueToNumber(cx, *argv, &d))
return JS_FALSE;
d = js_DoubleToInteger(d);
if (d < 0)
d = 0;
else if (d > delta)
d = delta;
count = (jsuint)d;
end = begin + count;
argc--;
argv++;
}
if (count == 1 && cx->version == JSVERSION_1_2) {
/*
* JS lacks "list context", whereby in Perl one turns the single
* scalar that's spliced out into an array just by assigning it to
* @single instead of $single, or by using it as Perl push's first
* argument, for instance.
*
* JS1.2 emulated Perl too closely and returned a non-Array for
* the single-splice-out case, requiring callers to test and wrap
* in [] if necessary. So JS1.3, default, and other versions all
* return an array of length 1 for uniformity.