2 * Copyright (C) 2004, 2008, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Collabora Ltd.
4 * Copyright (C) 2011 Peter Varga (pvarga@webkit.org), University of Szeged
5 * Copyright (C) 2013 Google Inc. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "bindings/v8/ScriptRegexp.h"
32 #include "bindings/v8/V8Binding.h"
33 #include "bindings/v8/V8PerIsolateData.h"
34 #include "bindings/v8/V8RecursionScope.h"
38 ScriptRegexp::ScriptRegexp(const String& pattern, TextCaseSensitivity caseSensitivity, MultilineMode multilineMode)
40 v8::Isolate* isolate = v8::Isolate::GetCurrent();
41 v8::HandleScope handleScope(isolate);
42 v8::Local<v8::Context> context = V8PerIsolateData::from(isolate)->ensureRegexContext();
43 v8::Context::Scope scope(context);
45 unsigned flags = v8::RegExp::kNone;
46 if (caseSensitivity == TextCaseInsensitive)
47 flags |= v8::RegExp::kIgnoreCase;
48 if (multilineMode == MultilineEnabled)
49 flags |= v8::RegExp::kMultiline;
51 v8::TryCatch tryCatch;
52 v8::Local<v8::RegExp> regex = v8::RegExp::New(v8String(context->GetIsolate(), pattern), static_cast<v8::RegExp::Flags>(flags));
54 // If the regex failed to compile we'll get an empty handle.
56 m_regex.set(isolate, regex);
59 int ScriptRegexp::match(const String& string, int startFrom, int* matchLength) const
64 if (m_regex.isEmpty() || string.isNull())
67 // v8 strings are limited to int.
68 if (string.length() > INT_MAX)
71 v8::Isolate* isolate = v8::Isolate::GetCurrent();
72 v8::HandleScope handleScope(isolate);
73 v8::Local<v8::Context> context = V8PerIsolateData::current()->ensureRegexContext();
74 v8::Context::Scope scope(context);
75 v8::TryCatch tryCatch;
77 V8RecursionScope::MicrotaskSuppression microtaskScope;
79 v8::Local<v8::RegExp> regex = m_regex.newLocal(isolate);
80 v8::Local<v8::Function> exec = regex->Get(v8AtomicString(isolate, "exec")).As<v8::Function>();
82 v8::Handle<v8::Value> argv[] = { v8String(context->GetIsolate(), string.substring(startFrom)) };
83 v8::Local<v8::Value> returnValue = exec->Call(regex, 1, argv);
85 // RegExp#exec returns null if there's no match, otherwise it returns an
86 // Array of strings with the first being the whole match string and others
87 // being subgroups. The Array also has some random properties tacked on like
88 // "index" which is the offset of the match.
90 // https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/RegExp/exec
92 if (!returnValue->IsArray())
95 v8::Local<v8::Array> result = returnValue.As<v8::Array>();
96 int matchOffset = result->Get(v8AtomicString(isolate, "index"))->ToInt32()->Value();
99 v8::Local<v8::String> match = result->Get(0).As<v8::String>();
100 *matchLength = match->Length();
103 return matchOffset + startFrom;
106 } // namespace WebCore