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arangodb/lib/V8/v8-conv.cpp

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////////////////////////////////////////////////////////////////////////////////
/// @brief V8 utility functions
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "v8-conv.h"
#include "Basics/StringUtils.h"
#include "Basics/conversions.h"
#include "Basics/logging.h"
#include "Basics/string-buffer.h"
#include "Basics/tri-strings.h"
#include "V8/v8-json.h"
#include "V8/v8-utils.h"
using namespace std;
using namespace triagens::basics;
// -----------------------------------------------------------------------------
// --SECTION-- CONVERSION FUNCTIONS
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
// --SECTION-- private functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t NULL into a V8 object
////////////////////////////////////////////////////////////////////////////////
static inline v8::Handle<v8::Value> ObjectJsonNull (v8::Isolate* isolate, TRI_json_t const* json) {
return v8::Null(isolate);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t BOOLEAN into a V8 object
////////////////////////////////////////////////////////////////////////////////
static inline v8::Handle<v8::Value> ObjectJsonBoolean (v8::Isolate* isolate, TRI_json_t const* json) {
return v8::Boolean::New(isolate, json->_value._boolean);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t NUMBER into a V8 object
////////////////////////////////////////////////////////////////////////////////
static inline v8::Handle<v8::Value> ObjectJsonNumber (v8::Isolate* isolate, TRI_json_t const* json) {
return v8::Number::New(isolate, json->_value._number);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t NUMBER into a V8 object
////////////////////////////////////////////////////////////////////////////////
static inline v8::Handle<v8::Value> ObjectJsonString (v8::Isolate* isolate, TRI_json_t const* json) {
return TRI_V8_PAIR_STRING(json->_value._string.data, json->_value._string.length - 1);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t OBJECT into a V8 object
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> ObjectJsonObject (v8::Isolate* isolate, TRI_json_t const* json) {
v8::Handle<v8::Object> object = v8::Object::New(isolate);
if (object.IsEmpty()) {
return v8::Undefined(isolate);
}
size_t const n = TRI_LengthVector(&json->_value._objects);
for (size_t i = 0; i < n; i += 2) {
TRI_json_t const* key = static_cast<TRI_json_t const*>(TRI_AddressVector(&json->_value._objects, i));
if (! TRI_IsStringJson(key)) {
continue;
}
TRI_json_t const* element = static_cast<TRI_json_t const*>(TRI_AddressVector(&json->_value._objects, i + 1));
auto val = TRI_ObjectJson(isolate, element);
if (! val.IsEmpty()) {
auto k = TRI_V8_PAIR_STRING(key->_value._string.data, key->_value._string.length - 1);
if (! k.IsEmpty()) {
object->ForceSet(TRI_V8_PAIR_STRING(key->_value._string.data, key->_value._string.length - 1), val);
}
}
}
return object;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t ARRAY into a V8 object
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> ObjectJsonArray (v8::Isolate* isolate, TRI_json_t const* json) {
uint32_t const n = static_cast<uint32_t>(TRI_LengthArrayJson(json));
v8::Handle<v8::Array> object = v8::Array::New(isolate, static_cast<int>(n));
if (object.IsEmpty()) {
return v8::Undefined(isolate);
}
uint32_t j = 0;
for (uint32_t i = 0; i < n; ++i) {
TRI_json_t const* element = static_cast<TRI_json_t const*>(TRI_AddressVector(&json->_value._objects, i));
v8::Handle<v8::Value> val = TRI_ObjectJson(isolate, element);
if (! val.IsEmpty()) {
object->Set(j++, val);
}
}
return object;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief extracts keys or values from a TRI_json_t* object
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> ExtractObject (v8::Isolate* isolate,
TRI_json_t const* json,
size_t offset) {
v8::EscapableHandleScope scope(isolate);
if (json == nullptr || json->_type != TRI_JSON_OBJECT) {
return scope.Escape<v8::Value>(v8::Undefined(isolate));
}
size_t const n = TRI_LengthVector(&json->_value._objects);
v8::Handle<v8::Array> result = v8::Array::New(isolate, static_cast<int>(n / 2));
uint32_t count = 0;
for (size_t i = offset; i < n; i += 2) {
TRI_json_t const* value = static_cast<TRI_json_t const*>(TRI_AtVector(&json->_value._objects, i));
if (value != nullptr) {
result->Set(count++, TRI_ObjectJson(isolate, value));
}
}
return scope.Escape<v8::Value>(result);
}
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @brief returns the keys of a TRI_json_t* object into a V8 array
////////////////////////////////////////////////////////////////////////////////
v8::Handle<v8::Value> TRI_KeysJson (v8::Isolate* isolate,
TRI_json_t const* json) {
return ExtractObject(isolate, json, 0);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief returns the values of a TRI_json_t* object into a V8 array
////////////////////////////////////////////////////////////////////////////////
v8::Handle<v8::Value> TRI_ValuesJson (v8::Isolate* isolate,
TRI_json_t const* json) {
return ExtractObject(isolate, json, 1);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a TRI_json_t into a V8 object
////////////////////////////////////////////////////////////////////////////////
v8::Handle<v8::Value> TRI_ObjectJson (v8::Isolate* isolate,
TRI_json_t const* json) {
if (json == nullptr) {
return v8::Undefined(isolate);
}
switch (json->_type) {
case TRI_JSON_NULL:
return ObjectJsonNull(isolate, json);
case TRI_JSON_BOOLEAN:
return ObjectJsonBoolean(isolate, json);
case TRI_JSON_NUMBER:
return ObjectJsonNumber(isolate, json);
case TRI_JSON_STRING:
case TRI_JSON_STRING_REFERENCE:
return ObjectJsonString(isolate, json);
case TRI_JSON_OBJECT:
return ObjectJsonObject(isolate, json);
case TRI_JSON_ARRAY:
return ObjectJsonArray(isolate, json);
case TRI_JSON_UNUSED: {
}
}
return v8::Undefined(isolate);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief convert a V8 value to a TRI_json_t value
////////////////////////////////////////////////////////////////////////////////
static int ObjectToJson (v8::Isolate* isolate,
TRI_json_t* result,
v8::Handle<v8::Value> const parameter,
std::set<int>& seenHashes,
std::vector<v8::Handle<v8::Object>>& seenObjects) {
v8::HandleScope scope(isolate);
if (parameter->IsNull()) {
TRI_InitNullJson(result);
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsBoolean()) {
v8::Handle<v8::Boolean> booleanParameter = parameter->ToBoolean();
TRI_InitBooleanJson(result, booleanParameter->Value());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsNumber()) {
v8::Handle<v8::Number> numberParameter = parameter->ToNumber();
TRI_InitNumberJson(result, numberParameter->Value());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsString()) {
v8::Handle<v8::String> stringParameter = parameter->ToString();
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, stringParameter);
if (*str == nullptr) {
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
// this passes ownership for the utf8 string to the JSON object
TRI_InitStringJson(result, str.steal(), str.length());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsArray()) {
v8::Handle<v8::Array> array = v8::Handle<v8::Array>::Cast(parameter);
uint32_t const n = array->Length();
// allocate the result array in one go
TRI_InitArrayJson(TRI_UNKNOWN_MEM_ZONE, result, static_cast<size_t>(n));
int res = TRI_ReserveVector(&result->_value._objects, static_cast<size_t>(n));
if (res != TRI_ERROR_NO_ERROR) {
// result array could not be allocated
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < n; ++i) {
// get address of next element
auto next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
res = ObjectToJson(isolate, next, array->Get(i),
seenHashes, seenObjects);
if (res != TRI_ERROR_NO_ERROR) {
// to mimic behavior of previous ArangoDB versions, we need to silently ignore this error
// now return the element to the vector
TRI_ReturnVector(&result->_value._objects);
// a better solution would be:
// initialize the element at position, otherwise later cleanups may
// peek into uninitialized memory
// TRI_InitNullJson(next);
// return res;
}
}
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsObject()) {
if (parameter->IsBooleanObject()) {
TRI_InitBooleanJson(result, v8::Handle<v8::BooleanObject>::Cast(parameter)->BooleanValue());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsNumberObject()) {
TRI_InitNumberJson(result, v8::Handle<v8::NumberObject>::Cast(parameter)->NumberValue());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsStringObject()) {
v8::Handle<v8::String> stringParameter(parameter->ToString());
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, stringParameter);
if (*str == nullptr) {
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
// this passes ownership for the utf8 string to the JSON object
TRI_InitStringJson(result, str.steal(), str.length());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsRegExp() ||
parameter->IsFunction() ||
parameter->IsExternal()) {
TRI_InitNullJson(result);
return TRI_ERROR_BAD_PARAMETER;
}
v8::Handle<v8::Object> o = parameter->ToObject();
// first check if the object has a "toJSON" function
v8::Handle<v8::String> toJsonString = TRI_V8_PAIR_STRING("toJSON", 6);
if (o->Has(toJsonString)) {
// call it if yes
v8::Handle<v8::Value> func = o->Get(toJsonString);
if (func->IsFunction()) {
v8::Handle<v8::Function> toJson = v8::Handle<v8::Function>::Cast(func);
v8::Handle<v8::Value> args;
v8::Handle<v8::Value> converted = toJson->Call(o, 0, &args);
if (! converted.IsEmpty()) {
// return whatever toJSON returned
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, converted->ToString());
if (*str == nullptr) {
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
// this passes ownership for the utf8 string to the JSON object
TRI_InitStringJson(result, str.steal(), str.length());
return TRI_ERROR_NO_ERROR;
}
}
// fall-through intentional
}
int hash = o->GetIdentityHash();
if (seenHashes.find(hash) != seenHashes.end()) {
// LOG_TRACE("found hash %d", hash);
for (auto it : seenObjects) {
if (parameter->StrictEquals(it)) {
// object is recursive
TRI_InitNullJson(result);
return TRI_ERROR_BAD_PARAMETER;
}
}
}
else {
seenHashes.emplace(hash);
}
seenObjects.emplace_back(o);
v8::Handle<v8::Array> names = o->GetOwnPropertyNames();
uint32_t const n = names->Length();
// allocate the result object buffer in one go
TRI_InitObjectJson(TRI_UNKNOWN_MEM_ZONE, result, static_cast<size_t>(n));
int res = TRI_ReserveVector(&result->_value._objects, static_cast<size_t>(n * 2)); // key + value
if (res != TRI_ERROR_NO_ERROR) {
// result object buffer could not be allocated
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < n; ++i) {
// process attribute name
v8::Handle<v8::Value> key = names->Get(i);
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, key);
if (*str == nullptr) {
return TRI_ERROR_OUT_OF_MEMORY;
}
TRI_json_t* next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
// this passes ownership for the utf8 string to the JSON object
char* attributeName = str.steal();
TRI_InitStringJson(next, attributeName, str.length());
// process attribute value
next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
res = ObjectToJson(isolate, next, o->Get(key), seenHashes, seenObjects);
if (res != TRI_ERROR_NO_ERROR) {
// to mimic behavior of previous ArangoDB versions, we need to silently ignore this error
// now free the attributeName string and return the elements to the vector
TRI_FreeString(TRI_UNKNOWN_MEM_ZONE, attributeName);
TRI_ReturnVector(&result->_value._objects);
TRI_ReturnVector(&result->_value._objects);
// a better solution would be:
// initialize the element at position, otherwise later cleanups may
// peek into uninitialized memory
// TRI_InitNullJson(next);
// return res;
}
}
seenObjects.pop_back();
return TRI_ERROR_NO_ERROR;
}
TRI_InitNullJson(result);
return TRI_ERROR_BAD_PARAMETER;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief convert a V8 value to a json_t value
////////////////////////////////////////////////////////////////////////////////
TRI_json_t* TRI_ObjectToJson (v8::Isolate* isolate,
v8::Handle<v8::Value> const parameter) {
TRI_json_t* json = TRI_CreateNullJson(TRI_UNKNOWN_MEM_ZONE);
if (json == nullptr) {
return nullptr;
}
std::set<int> seenHashes;
std::vector<v8::Handle<v8::Object>> seenObjects;
int res = ObjectToJson(isolate, json, parameter, seenHashes, seenObjects);
if (res != TRI_ERROR_NO_ERROR) {
// some processing error occurred
TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
return nullptr;
}
return json;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief convert a V8 value to a TRI_json_t value
////////////////////////////////////////////////////////////////////////////////
static int ObjectToJsonSimple (v8::Isolate* isolate,
TRI_json_t* result,
v8::Handle<v8::Value> const parameter) {
v8::HandleScope scope(isolate);
if (parameter->IsNull()) {
TRI_InitNullJson(result);
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsBoolean()) {
v8::Handle<v8::Boolean> booleanParameter = parameter->ToBoolean();
TRI_InitBooleanJson(result, booleanParameter->Value());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsNumber()) {
v8::Handle<v8::Number> numberParameter = parameter->ToNumber();
TRI_InitNumberJson(result, numberParameter->Value());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsString()) {
v8::Handle<v8::String> stringParameter = parameter->ToString();
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, stringParameter);
if (*str == nullptr) {
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
// this passes ownership for the utf8 string to the JSON object
TRI_InitStringJson(result, str.steal(), str.length());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsArray()) {
v8::Handle<v8::Array> array = v8::Handle<v8::Array>::Cast(parameter);
uint32_t const n = array->Length();
// allocate the result array in one go
TRI_InitArrayJson(TRI_UNKNOWN_MEM_ZONE, result, static_cast<size_t>(n));
int res = TRI_ReserveVector(&result->_value._objects, static_cast<size_t>(n));
if (res != TRI_ERROR_NO_ERROR) {
// result array could not be allocated
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < n; ++i) {
// get address of next element
TRI_json_t* next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
res = ObjectToJsonSimple(isolate, next, array->Get(i));
if (res != TRI_ERROR_NO_ERROR) {
// to mimic behavior of previous ArangoDB versions, we need to silently ignore this error
// now return the element to the vector
TRI_ReturnVector(&result->_value._objects);
// a better solution would be:
// initialize the element at position, otherwise later cleanups may
// peek into uninitialized memory
// TRI_InitNullJson(next);
// return res;
}
}
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsObject()) {
if (parameter->IsBooleanObject()) {
TRI_InitBooleanJson(result, v8::Handle<v8::BooleanObject>::Cast(parameter)->BooleanValue());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsNumberObject()) {
TRI_InitNumberJson(result, v8::Handle<v8::NumberObject>::Cast(parameter)->NumberValue());
return TRI_ERROR_NO_ERROR;
}
if (parameter->IsStringObject()) {
v8::Handle<v8::String> stringParameter(parameter->ToString());
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, stringParameter);
if (*str == nullptr) {
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
// this passes ownership for the utf8 string to the JSON object
TRI_InitStringJson(result, str.steal(), str.length());
return TRI_ERROR_NO_ERROR;
}
v8::Handle<v8::Object> o = parameter->ToObject();
v8::Handle<v8::Array> names = o->GetOwnPropertyNames();
uint32_t const n = names->Length();
// allocate the result object buffer in one go
TRI_InitObjectJson(TRI_UNKNOWN_MEM_ZONE, result, static_cast<size_t>(n));
int res = TRI_ReserveVector(&result->_value._objects, static_cast<size_t>(n * 2)); // key + value
if (res != TRI_ERROR_NO_ERROR) {
// result object buffer could not be allocated
TRI_InitNullJson(result);
return TRI_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < n; ++i) {
// process attribute name
v8::Handle<v8::Value> key = names->Get(i);
TRI_Utf8ValueNFC str(TRI_UNKNOWN_MEM_ZONE, key);
if (*str == nullptr) {
return TRI_ERROR_OUT_OF_MEMORY;
}
TRI_json_t* next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
// this passes ownership for the utf8 string to the JSON object
char* attributeName = str.steal();
TRI_InitStringJson(next, attributeName, str.length());
// process attribute value
next = static_cast<TRI_json_t*>(TRI_NextVector(&result->_value._objects));
// the reserve call above made sure we could not have run out of memory
TRI_ASSERT_EXPENSIVE(next != nullptr);
res = ObjectToJsonSimple(isolate, next, o->Get(key));
if (res != TRI_ERROR_NO_ERROR) {
// to mimic behavior of previous ArangoDB versions, we need to silently ignore this error
// now free the attributeName string and return the elements to the vector
TRI_FreeString(TRI_UNKNOWN_MEM_ZONE, attributeName);
TRI_ReturnVector(&result->_value._objects);
TRI_ReturnVector(&result->_value._objects);
// a better solution would be:
// initialize the element at position, otherwise later cleanups may
// peek into uninitialized memory
// TRI_InitNullJson(next);
// return res;
}
}
return TRI_ERROR_NO_ERROR;
}
TRI_InitNullJson(result);
return TRI_ERROR_BAD_PARAMETER;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief convert a V8 value to a json_t value
/// this function assumes that the V8 object does not contain any cycles and
/// does not contain types such as Function, Date or RegExp
////////////////////////////////////////////////////////////////////////////////
TRI_json_t* TRI_ObjectToJsonSimple (v8::Isolate* isolate,
v8::Handle<v8::Value> const parameter) {
TRI_json_t* json = TRI_CreateNullJson(TRI_UNKNOWN_MEM_ZONE);
if (json == nullptr) {
return nullptr;
}
int res = ObjectToJsonSimple(isolate, json, parameter);
if (res != TRI_ERROR_NO_ERROR) {
// some processing error occurred
TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
return nullptr;
}
return json;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts a V8 object to a string
////////////////////////////////////////////////////////////////////////////////
std::string TRI_ObjectToString (v8::Handle<v8::Value> const value) {
TRI_Utf8ValueNFC utf8Value(TRI_UNKNOWN_MEM_ZONE, value);
if (*utf8Value == nullptr) {
return "";
}
return std::string(*utf8Value, utf8Value.length());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an V8 object to an int64_t
////////////////////////////////////////////////////////////////////////////////
int64_t TRI_ObjectToInt64 (v8::Handle<v8::Value> const value) {
if (value->IsNumber()) {
return (int64_t) value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return (int64_t) no->NumberValue();
}
return 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an V8 object to a uint64_t
////////////////////////////////////////////////////////////////////////////////
uint64_t TRI_ObjectToUInt64 (v8::Handle<v8::Value> const value,
const bool allowStringConversion) {
if (value->IsNumber()) {
return (uint64_t) value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return (uint64_t) no->NumberValue();
}
if (allowStringConversion && value->IsString()) {
v8::String::Utf8Value str(value);
return StringUtils::uint64(*str, str.length());
}
return 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an V8 object to a double
////////////////////////////////////////////////////////////////////////////////
double TRI_ObjectToDouble (v8::Handle<v8::Value> const value) {
if (value->IsNumber()) {
return value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return no->NumberValue();
}
return 0.0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an V8 object to a double with error handling
////////////////////////////////////////////////////////////////////////////////
double TRI_ObjectToDouble (v8::Handle<v8::Value> const value, bool& error) {
error = false;
if (value->IsNumber()) {
return value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return no->NumberValue();
}
error = true;
return 0.0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an V8 object to a boolean
////////////////////////////////////////////////////////////////////////////////
bool TRI_ObjectToBoolean (v8::Handle<v8::Value> const value) {
if (value->IsBoolean()) {
return value->ToBoolean()->Value();
}
else if (value->IsBooleanObject()) {
v8::Handle<v8::BooleanObject> bo = v8::Handle<v8::BooleanObject>::Cast(value);
return bo->BooleanValue();
}
return false;
}
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @brief initialises the V8 conversion module
////////////////////////////////////////////////////////////////////////////////
void TRI_InitV8Conversions (v8::Handle<v8::Context> context) {
// nothing special to do here
}
// -----------------------------------------------------------------------------
// --SECTION-- END-OF-FILE
// -----------------------------------------------------------------------------
// Local Variables:
// mode: outline-minor
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
// End:
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