mirror of https://gitee.com/bigwinds/arangodb
193 lines
7.4 KiB
C++
193 lines
7.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_V8_V8__UTILS_H
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#define ARANGODB_V8_V8__UTILS_H 1
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#include <stddef.h>
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#include <cstdint>
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#include <string>
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#include <v8.h>
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namespace arangodb {
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class Result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Converts an object to a UTF-8-encoded and normalized character array.
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////////////////////////////////////////////////////////////////////////////////
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class TRI_Utf8ValueNFC {
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public:
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explicit TRI_Utf8ValueNFC(v8::Isolate* isolate, v8::Handle<v8::Value> const);
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~TRI_Utf8ValueNFC();
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// Disallow copying and assigning.
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TRI_Utf8ValueNFC(TRI_Utf8ValueNFC const&) = delete;
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TRI_Utf8ValueNFC& operator=(TRI_Utf8ValueNFC const&) = delete;
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inline char* operator*() { return _str; }
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inline char const* operator*() const { return _str; }
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inline size_t length() const { return _length; }
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char* steal() {
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char* tmp = _str;
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_str = nullptr;
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return tmp;
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}
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private:
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char* _str;
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size_t _length;
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};
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/// @brief slot for a type
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static int const SLOT_CLASS_TYPE = 0;
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/// @brief slot for a "C++ class"
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static int const SLOT_CLASS = 1;
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/// @brief slot for a V8 external
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static int const SLOT_EXTERNAL = 2;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief shell command program name (may be printed in stack traces)
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////////////////////////////////////////////////////////////////////////////////
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#define TRI_V8_SHELL_COMMAND_NAME "<shell command>"
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////////////////////////////////////////////////////////////////////////////////
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/// @brief unwraps a C++ class given a v8::Object
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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static T* TRI_UnwrapClass(v8::Handle<v8::Object> obj, int32_t type,
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v8::Handle<v8::Context> context) {
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if (obj->InternalFieldCount() <= SLOT_CLASS) {
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return nullptr;
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}
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auto slot = obj->GetInternalField(SLOT_CLASS_TYPE);
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if (slot->Int32Value(context).ToChecked() != type) {
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return nullptr;
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}
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auto slotc = obj->GetInternalField(SLOT_CLASS);
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auto slotp = v8::Handle<v8::External>::Cast(slotc);
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auto val = slotp->Value();
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auto ret = static_cast<T*>(val);
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return ret;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief reports an exception
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////////////////////////////////////////////////////////////////////////////////
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std::string TRI_StringifyV8Exception(v8::Isolate* isolate, v8::TryCatch*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief prints an exception and stacktrace
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////////////////////////////////////////////////////////////////////////////////
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void TRI_LogV8Exception(v8::Isolate* isolate, v8::TryCatch*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief reads a file into the current context
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_ExecuteGlobalJavaScriptFile(v8::Isolate* isolate, char const*, bool);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief executes all files from a directory in a local context
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_ExecuteLocalJavaScriptDirectory(v8::Isolate* isolate, char const*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief parses a file
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_ParseJavaScriptFile(v8::Isolate* isolate, char const*, bool);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief executes a string within a V8 context, optionally print the result
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////////////////////////////////////////////////////////////////////////////////
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v8::Handle<v8::Value> TRI_ExecuteJavaScriptString(v8::Isolate* isolate,
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v8::Handle<v8::Context> context,
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v8::Handle<v8::String> const source,
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v8::Handle<v8::String> const name,
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bool printResult);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates an error in a javascript object, based on error number only
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////////////////////////////////////////////////////////////////////////////////
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void TRI_CreateErrorObject(v8::Isolate* isolate, int errorNumber);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates an error in a javascript object, based on arangodb::Result
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////////////////////////////////////////////////////////////////////////////////
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void TRI_CreateErrorObject(v8::Isolate* isolate, arangodb::Result const&);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates an error in a javascript object
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////////////////////////////////////////////////////////////////////////////////
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void TRI_CreateErrorObject(v8::Isolate* isolate, int errorNumber,
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std::string const& message, bool autoPrepend);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief normalize a v8 object
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////////////////////////////////////////////////////////////////////////////////
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void TRI_normalize_V8_Obj(v8::FunctionCallbackInfo<v8::Value> const& args,
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v8::Handle<v8::Value> obj);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief run the V8 garbage collection for at most a specifiable amount of
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/// time
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_RunGarbageCollectionV8(v8::Isolate*, double);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief clear the instance-local cache of wrapped objects
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////////////////////////////////////////////////////////////////////////////////
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void TRI_ClearObjectCacheV8(v8::Isolate*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief stores the V8 utils function inside the global variable
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////////////////////////////////////////////////////////////////////////////////
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void TRI_InitV8Utils(v8::Isolate* isolate, v8::Handle<v8::Context>,
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std::string const& startupPath, std::string const& modules);
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void JS_Download(v8::FunctionCallbackInfo<v8::Value> const& args);
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#endif
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