1/*
2 * Copyright (C) 2012-2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RegExpMatchesArray.h"
28
29namespace JSC {
30
31JSArray* createEmptyRegExpMatchesArray(JSGlobalObject* globalObject, JSString* input, RegExp* regExp)
32{
33 VM& vm = globalObject->vm();
34 JSArray* array;
35
36 // FIXME: This should handle array allocation errors gracefully.
37 // https://bugs.webkit.org/show_bug.cgi?id=155144
38
39 GCDeferralContext deferralContext(vm.heap);
40 ObjectInitializationScope scope(vm);
41
42 if (UNLIKELY(globalObject->isHavingABadTime())) {
43 array = JSArray::tryCreateUninitializedRestricted(scope, &deferralContext, globalObject->regExpMatchesArrayStructure(), regExp->numSubpatterns() + 1);
44 // FIXME: we should probably throw an out of memory error here, but
45 // when making this change we should check that all clients of this
46 // function will correctly handle an exception being thrown from here.
47 // https://bugs.webkit.org/show_bug.cgi?id=169786
48 RELEASE_ASSERT(array);
49
50 array->initializeIndexWithoutBarrier(scope, 0, jsEmptyString(vm));
51
52 if (unsigned numSubpatterns = regExp->numSubpatterns()) {
53 for (unsigned i = 1; i <= numSubpatterns; ++i)
54 array->initializeIndexWithoutBarrier(scope, i, jsUndefined());
55 }
56 } else {
57 array = tryCreateUninitializedRegExpMatchesArray(scope, &deferralContext, globalObject->regExpMatchesArrayStructure(), regExp->numSubpatterns() + 1);
58 RELEASE_ASSERT(array);
59
60 array->initializeIndexWithoutBarrier(scope, 0, jsEmptyString(vm), ArrayWithContiguous);
61
62 if (unsigned numSubpatterns = regExp->numSubpatterns()) {
63 for (unsigned i = 1; i <= numSubpatterns; ++i)
64 array->initializeIndexWithoutBarrier(scope, i, jsUndefined(), ArrayWithContiguous);
65 }
66 }
67
68 array->putDirectWithoutBarrier(RegExpMatchesArrayIndexPropertyOffset, jsNumber(-1));
69 array->putDirectWithoutBarrier(RegExpMatchesArrayInputPropertyOffset, input);
70 array->putDirectWithoutBarrier(RegExpMatchesArrayGroupsPropertyOffset, jsUndefined());
71 return array;
72}
73
74static Structure* createStructureImpl(VM& vm, JSGlobalObject* globalObject, IndexingType indexingType)
75{
76 Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType);
77 PropertyOffset offset;
78 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->index, 0, offset);
79 ASSERT(offset == RegExpMatchesArrayIndexPropertyOffset);
80 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->input, 0, offset);
81 ASSERT(offset == RegExpMatchesArrayInputPropertyOffset);
82 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->groups, 0, offset);
83 ASSERT(offset == RegExpMatchesArrayGroupsPropertyOffset);
84 return structure;
85}
86
87Structure* createRegExpMatchesArrayStructure(VM& vm, JSGlobalObject* globalObject)
88{
89 return createStructureImpl(vm, globalObject, ArrayWithContiguous);
90}
91
92Structure* createRegExpMatchesArraySlowPutStructure(VM& vm, JSGlobalObject* globalObject)
93{
94 return createStructureImpl(vm, globalObject, ArrayWithSlowPutArrayStorage);
95}
96
97} // namespace JSC
98