| /* |
| * Copyright (C) 2004, 2008, 2009 Apple Inc. All rights reserved. |
| * Copyright (C) 2008 Collabora Ltd. |
| * Copyright (C) 2011 Peter Varga (pvarga@webkit.org), University of Szeged |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "bindings/core/v8/ScriptRegexp.h" |
| |
| #include "bindings/core/v8/V8Binding.h" |
| #include "bindings/core/v8/V8PerIsolateData.h" |
| #include "bindings/core/v8/V8ScriptRunner.h" |
| #include "platform/ScriptForbiddenScope.h" |
| |
| namespace blink { |
| |
| ScriptRegexp::ScriptRegexp(const String& pattern, TextCaseSensitivity caseSensitivity, MultilineMode multilineMode) |
| { |
| v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
| v8::HandleScope handleScope(isolate); |
| v8::Context::Scope contextScope(V8PerIsolateData::from(isolate)->ensureScriptRegexpContext()); |
| v8::TryCatch tryCatch; |
| |
| unsigned flags = v8::RegExp::kNone; |
| if (caseSensitivity == TextCaseInsensitive) |
| flags |= v8::RegExp::kIgnoreCase; |
| if (multilineMode == MultilineEnabled) |
| flags |= v8::RegExp::kMultiline; |
| |
| v8::Local<v8::RegExp> regex = v8::RegExp::New(v8String(isolate, pattern), static_cast<v8::RegExp::Flags>(flags)); |
| |
| // If the regex failed to compile we'll get an empty handle. |
| if (!regex.IsEmpty()) |
| m_regex.set(isolate, regex); |
| } |
| |
| int ScriptRegexp::match(const String& string, int startFrom, int* matchLength) const |
| { |
| if (matchLength) |
| *matchLength = 0; |
| |
| if (m_regex.isEmpty() || string.isNull()) |
| return -1; |
| |
| // v8 strings are limited to int. |
| if (string.length() > INT_MAX) |
| return -1; |
| |
| ScriptForbiddenScope::AllowUserAgentScript allowScript; |
| |
| v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
| v8::HandleScope handleScope(isolate); |
| v8::Context::Scope contextScope(V8PerIsolateData::from(isolate)->ensureScriptRegexpContext()); |
| v8::TryCatch tryCatch; |
| |
| v8::Local<v8::RegExp> regex = m_regex.newLocal(isolate); |
| v8::Local<v8::Function> exec = regex->Get(v8AtomicString(isolate, "exec")).As<v8::Function>(); |
| v8::Handle<v8::Value> argv[] = { v8String(isolate, string.substring(startFrom)) }; |
| v8::Local<v8::Value> returnValue = V8ScriptRunner::callInternalFunction(exec, regex, WTF_ARRAY_LENGTH(argv), argv, isolate); |
| |
| if (tryCatch.HasCaught()) |
| return -1; |
| |
| // RegExp#exec returns null if there's no match, otherwise it returns an |
| // Array of strings with the first being the whole match string and others |
| // being subgroups. The Array also has some random properties tacked on like |
| // "index" which is the offset of the match. |
| // |
| // https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/RegExp/exec |
| |
| ASSERT(!returnValue.IsEmpty()); |
| if (!returnValue->IsArray()) |
| return -1; |
| |
| v8::Local<v8::Array> result = returnValue.As<v8::Array>(); |
| int matchOffset = result->Get(v8AtomicString(isolate, "index"))->ToInt32()->Value(); |
| if (matchLength) { |
| v8::Local<v8::String> match = result->Get(0).As<v8::String>(); |
| *matchLength = match->Length(); |
| } |
| |
| return matchOffset + startFrom; |
| } |
| |
| } // namespace blink |