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
|
/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2007, 2008, 2012, 2016 Apple Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#pragma once
#include "ButterflyInlines.h"
#include "Error.h"
#include "ExceptionHelpers.h"
#include "JSArray.h"
#include "JSGlobalObject.h"
#include "JSString.h"
#include "JSCInlines.h"
#include "RegExpConstructor.h"
#include "RegExpMatchesArray.h"
#include "RegExpObject.h"
namespace JSC {
ALWAYS_INLINE unsigned getRegExpObjectLastIndexAsUnsigned(
ExecState* exec, RegExpObject* regExpObject, const String& input)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue jsLastIndex = regExpObject->getLastIndex();
unsigned lastIndex;
if (LIKELY(jsLastIndex.isUInt32())) {
lastIndex = jsLastIndex.asUInt32();
if (lastIndex > input.length()) {
scope.release();
regExpObject->setLastIndex(exec, 0);
return UINT_MAX;
}
} else {
double doubleLastIndex = jsLastIndex.toInteger(exec);
RETURN_IF_EXCEPTION(scope, UINT_MAX);
if (doubleLastIndex < 0 || doubleLastIndex > input.length()) {
scope.release();
regExpObject->setLastIndex(exec, 0);
return UINT_MAX;
}
lastIndex = static_cast<unsigned>(doubleLastIndex);
}
return lastIndex;
}
JSValue RegExpObject::execInline(ExecState* exec, JSGlobalObject* globalObject, JSString* string)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RegExp* regExp = this->regExp();
RegExpConstructor* regExpConstructor = globalObject->regExpConstructor();
String input = string->value(exec);
RETURN_IF_EXCEPTION(scope, { });
bool globalOrSticky = regExp->globalOrSticky();
unsigned lastIndex;
if (globalOrSticky) {
lastIndex = getRegExpObjectLastIndexAsUnsigned(exec, this, input);
ASSERT(!scope.exception() || lastIndex == UINT_MAX);
if (lastIndex == UINT_MAX)
return jsNull();
} else
lastIndex = 0;
MatchResult result;
JSArray* array =
createRegExpMatchesArray(vm, globalObject, string, input, regExp, lastIndex, result);
if (!array) {
scope.release();
if (globalOrSticky)
setLastIndex(exec, 0);
return jsNull();
}
if (globalOrSticky)
setLastIndex(exec, result.end);
RETURN_IF_EXCEPTION(scope, { });
regExpConstructor->recordMatch(vm, regExp, string, result);
return array;
}
// Shared implementation used by test and exec.
MatchResult RegExpObject::matchInline(
ExecState* exec, JSGlobalObject* globalObject, JSString* string)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RegExp* regExp = this->regExp();
RegExpConstructor* regExpConstructor = globalObject->regExpConstructor();
String input = string->value(exec);
RETURN_IF_EXCEPTION(scope, { });
if (!regExp->global() && !regExp->sticky())
return regExpConstructor->performMatch(vm, regExp, string, input, 0);
unsigned lastIndex = getRegExpObjectLastIndexAsUnsigned(exec, this, input);
ASSERT(!scope.exception() || (lastIndex == UINT_MAX));
if (lastIndex == UINT_MAX)
return MatchResult::failed();
MatchResult result = regExpConstructor->performMatch(vm, regExp, string, input, lastIndex);
scope.release();
setLastIndex(exec, result.end);
return result;
}
unsigned RegExpObject::advanceStringUnicode(String s, unsigned length, unsigned currentIndex)
{
if (currentIndex + 1 >= length)
return currentIndex + 1;
UChar first = s[currentIndex];
if (first < 0xD800 || first > 0xDBFF)
return currentIndex + 1;
UChar second = s[currentIndex + 1];
if (second < 0xDC00 || second > 0xDFFF)
return currentIndex + 1;
return currentIndex + 2;
}
} // namespace JSC
|
