1/*
2 * Copyright (C) 2012-2017 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 ObjectInitializationScope scope(vm);
58 array = tryCreateUninitializedRegExpMatchesArray(scope, &deferralContext, globalObject->regExpMatchesArrayStructure(), regExp->numSubpatterns() + 1);
59 RELEASE_ASSERT(array);
60
61 array->initializeIndexWithoutBarrier(scope, 0, jsEmptyString(&vm), ArrayWithContiguous);
62
63 if (unsigned numSubpatterns = regExp->numSubpatterns()) {
64 for (unsigned i = 1; i <= numSubpatterns; ++i)
65 array->initializeIndexWithoutBarrier(scope, i, jsUndefined(), ArrayWithContiguous);
66 }
67 }
68
69 array->putDirectWithoutBarrier(RegExpMatchesArrayIndexPropertyOffset, jsNumber(-1));
70 array->putDirectWithoutBarrier(RegExpMatchesArrayInputPropertyOffset, input);
71 return array;
72}
73
74enum class ShouldCreateGroups { No, Yes };
75
76static Structure* createStructureImpl(VM& vm, JSGlobalObject* globalObject, IndexingType indexingType, ShouldCreateGroups shouldCreateGroups = ShouldCreateGroups::No)
77{
78 Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType);
79 PropertyOffset offset;
80 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->index, 0, offset);
81 ASSERT(offset == RegExpMatchesArrayIndexPropertyOffset);
82 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->input, 0, offset);
83 ASSERT(offset == RegExpMatchesArrayInputPropertyOffset);
84 switch (shouldCreateGroups) {
85 case ShouldCreateGroups::Yes:
86 structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->groups, 0, offset);
87 ASSERT(offset == RegExpMatchesArrayGroupsPropertyOffset);
88 break;
89 case ShouldCreateGroups::No:
90 break;
91 }
92 return structure;
93}
94
95Structure* createRegExpMatchesArrayStructure(VM& vm, JSGlobalObject* globalObject)
96{
97 return createStructureImpl(vm, globalObject, ArrayWithContiguous);
98}
99
100Structure* createRegExpMatchesArraySlowPutStructure(VM& vm, JSGlobalObject* globalObject)
101{
102 return createStructureImpl(vm, globalObject, ArrayWithSlowPutArrayStorage);
103}
104
105Structure* createRegExpMatchesArrayWithGroupsStructure(VM& vm, JSGlobalObject* globalObject)
106{
107 return createStructureImpl(vm, globalObject, ArrayWithContiguous, ShouldCreateGroups::Yes);
108}
109
110Structure* createRegExpMatchesArrayWithGroupsSlowPutStructure(VM& vm, JSGlobalObject* globalObject)
111{
112 return createStructureImpl(vm, globalObject, ArrayWithSlowPutArrayStorage, ShouldCreateGroups::Yes);
113}
114
115} // namespace JSC
116