| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "platform/v8_inspector/V8Regex.h" |
| |
| #include "platform/v8_inspector/V8Compat.h" |
| #include "platform/v8_inspector/V8InspectorImpl.h" |
| #include "platform/v8_inspector/V8StringUtil.h" |
| #include "platform/v8_inspector/public/V8InspectorClient.h" |
| |
| #include <limits.h> |
| |
| namespace v8_inspector { |
| |
| V8Regex::V8Regex(V8InspectorImpl* inspector, const String16& pattern, bool caseSensitive, bool multiline) |
| : m_inspector(inspector) |
| { |
| v8::Isolate* isolate = m_inspector->isolate(); |
| v8::HandleScope handleScope(isolate); |
| v8::Local<v8::Context> context = m_inspector->regexContext(); |
| v8::Context::Scope contextScope(context); |
| v8::TryCatch tryCatch(isolate); |
| |
| unsigned flags = v8::RegExp::kNone; |
| if (!caseSensitive) |
| flags |= v8::RegExp::kIgnoreCase; |
| if (multiline) |
| flags |= v8::RegExp::kMultiline; |
| |
| v8::Local<v8::RegExp> regex; |
| if (v8::RegExp::New(context, toV8String(isolate, pattern), static_cast<v8::RegExp::Flags>(flags)).ToLocal(®ex)) |
| m_regex.Reset(isolate, regex); |
| else if (tryCatch.HasCaught()) |
| m_errorMessage = toProtocolString(tryCatch.Message()->Get()); |
| else |
| m_errorMessage = "Internal error"; |
| } |
| |
| int V8Regex::match(const String16& string, int startFrom, int* matchLength) const |
| { |
| if (matchLength) |
| *matchLength = 0; |
| |
| if (m_regex.IsEmpty() || string.isEmpty()) |
| return -1; |
| |
| // v8 strings are limited to int. |
| if (string.length() > INT_MAX) |
| return -1; |
| |
| v8::Isolate* isolate = m_inspector->isolate(); |
| v8::HandleScope handleScope(isolate); |
| v8::Local<v8::Context> context = m_inspector->regexContext(); |
| v8::MicrotasksScope microtasks(isolate, v8::MicrotasksScope::kDoNotRunMicrotasks); |
| v8::TryCatch tryCatch(isolate); |
| |
| v8::Local<v8::RegExp> regex = m_regex.Get(isolate); |
| v8::Local<v8::Value> exec; |
| if (!regex->Get(context, toV8StringInternalized(isolate, "exec")).ToLocal(&exec)) |
| return -1; |
| v8::Local<v8::Value> argv[] = { toV8String(isolate, string.substring(startFrom)) }; |
| v8::Local<v8::Value> returnValue; |
| if (!exec.As<v8::Function>()->Call(context, regex, PROTOCOL_ARRAY_LENGTH(argv), argv).ToLocal(&returnValue)) |
| 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 |
| |
| DCHECK(!returnValue.IsEmpty()); |
| if (!returnValue->IsArray()) |
| return -1; |
| |
| v8::Local<v8::Array> result = returnValue.As<v8::Array>(); |
| v8::Local<v8::Value> matchOffset; |
| if (!result->Get(context, toV8StringInternalized(isolate, "index")).ToLocal(&matchOffset)) |
| return -1; |
| if (matchLength) { |
| v8::Local<v8::Value> match; |
| if (!result->Get(context, 0).ToLocal(&match)) |
| return -1; |
| *matchLength = match.As<v8::String>()->Length(); |
| } |
| |
| return matchOffset.As<v8::Int32>()->Value() + startFrom; |
| } |
| |
| } // namespace v8_inspector |