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deps: provide more V8 backwards compatibility
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Add back a number deprecated APIs, using shims that
should work well enough at least for the duration of Node 11
and do not come with significant maintenance overhead.

Refs: nodejs/node#23122

PR-URL: nodejs/node#23158
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Yang Guo <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>

Patch-Filename: deps_provide_more_v8_backwards_compatibility.patch
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@addaleax @wuzhiming
addaleax authored and wuzhiming committed Aug 7, 2019
1 parent c6e3833 commit b383efb
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65 changes: 65 additions & 0 deletions include/v8.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -996,6 +996,10 @@ class V8_EXPORT PrimitiveArray {
public:
static Local<PrimitiveArray> New(Isolate* isolate, int length);
int Length() const;
V8_DEPRECATED("Use Isolate* version",
void Set(int index, Local<Primitive> item));
V8_DEPRECATED("Use Isolate* version",
Local<Primitive> Get(int index));
void Set(Isolate* isolate, int index, Local<Primitive> item);
Local<Primitive> Get(Isolate* isolate, int index);
};
Expand Down Expand Up @@ -1699,6 +1703,8 @@ class V8_EXPORT StackTrace {
/**
* Returns a StackFrame at a particular index.
*/
V8_DEPRECATED("Use Isolate version",
Local<StackFrame> GetFrame(uint32_t index) const);
Local<StackFrame> GetFrame(Isolate* isolate, uint32_t index) const;

/**
Expand Down Expand Up @@ -2407,6 +2413,13 @@ class V8_EXPORT Value : public Data {
V8_DEPRECATE_SOON("Use maybe version",
Local<Int32> ToInt32(Isolate* isolate) const);

inline V8_DEPRECATED("Use maybe version",
Local<Boolean> ToBoolean() const);
inline V8_DEPRECATED("Use maybe version", Local<String> ToString() const);
inline V8_DEPRECATED("Use maybe version", Local<Object> ToObject() const);
inline V8_DEPRECATED("Use maybe version",
Local<Integer> ToInteger() const);

/**
* Attempts to convert a string to an array index.
* Returns an empty handle if the conversion fails.
Expand All @@ -2426,7 +2439,14 @@ class V8_EXPORT Value : public Data {
Local<Context> context) const;
V8_WARN_UNUSED_RESULT Maybe<int32_t> Int32Value(Local<Context> context) const;

V8_DEPRECATED("Use maybe version", bool BooleanValue() const);
V8_DEPRECATED("Use maybe version", double NumberValue() const);
V8_DEPRECATED("Use maybe version", int64_t IntegerValue() const);
V8_DEPRECATED("Use maybe version", uint32_t Uint32Value() const);
V8_DEPRECATED("Use maybe version", int32_t Int32Value() const);

/** JS == */
V8_DEPRECATED("Use maybe version", bool Equals(Local<Value> that) const);
V8_WARN_UNUSED_RESULT Maybe<bool> Equals(Local<Context> context,
Local<Value> that) const;
bool StrictEquals(Local<Value> that) const;
Expand Down Expand Up @@ -2533,6 +2553,8 @@ class V8_EXPORT String : public Name {
* Returns the number of bytes in the UTF-8 encoded
* representation of this string.
*/
V8_DEPRECATED("Use Isolate version instead", int Utf8Length() const);

int Utf8Length(Isolate* isolate) const;

/**
Expand Down Expand Up @@ -2589,12 +2611,23 @@ class V8_EXPORT String : public Name {
// 16-bit character codes.
int Write(Isolate* isolate, uint16_t* buffer, int start = 0, int length = -1,
int options = NO_OPTIONS) const;
V8_DEPRECATED("Use Isolate* version",
int Write(uint16_t* buffer, int start = 0, int length = -1,
int options = NO_OPTIONS) const);
// One byte characters.
int WriteOneByte(Isolate* isolate, uint8_t* buffer, int start = 0,
int length = -1, int options = NO_OPTIONS) const;
V8_DEPRECATED("Use Isolate* version",
int WriteOneByte(uint8_t* buffer, int start = 0,
int length = -1, int options = NO_OPTIONS)
const);
// UTF-8 encoded characters.
int WriteUtf8(Isolate* isolate, char* buffer, int length = -1,
int* nchars_ref = nullptr, int options = NO_OPTIONS) const;
V8_DEPRECATED("Use Isolate* version",
int WriteUtf8(char* buffer, int length = -1,
int* nchars_ref = nullptr,
int options = NO_OPTIONS) const);

/**
* A zero length string.
Expand Down Expand Up @@ -2786,6 +2819,9 @@ class V8_EXPORT String : public Name {
*/
static Local<String> Concat(Isolate* isolate, Local<String> left,
Local<String> right);
static V8_DEPRECATED("Use Isolate* version",
Local<String> Concat(Local<String> left,
Local<String> right));

/**
* Creates a new external string using the data defined in the given
Expand Down Expand Up @@ -2854,6 +2890,8 @@ class V8_EXPORT String : public Name {
*/
class V8_EXPORT Utf8Value {
public:
V8_DEPRECATED("Use Isolate version",
explicit Utf8Value(Local<v8::Value> obj));
Utf8Value(Isolate* isolate, Local<v8::Value> obj);
~Utf8Value();
char* operator*() { return str_; }
Expand All @@ -2877,6 +2915,7 @@ class V8_EXPORT String : public Name {
*/
class V8_EXPORT Value {
public:
V8_DEPRECATED("Use Isolate version", explicit Value(Local<v8::Value> obj));
Value(Isolate* isolate, Local<v8::Value> obj);
~Value();
uint16_t* operator*() { return str_; }
Expand Down Expand Up @@ -5271,6 +5310,8 @@ class V8_EXPORT BooleanObject : public Object {
class V8_EXPORT StringObject : public Object {
public:
static Local<Value> New(Isolate* isolate, Local<String> value);
V8_DEPRECATED("Use Isolate* version",
static Local<Value> New(Local<String> value));

Local<String> ValueOf() const;

Expand Down Expand Up @@ -10127,6 +10168,30 @@ template <class T> Value* Value::Cast(T* value) {
}


Local<Boolean> Value::ToBoolean() const {
return ToBoolean(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(Local<Boolean>());
}


Local<String> Value::ToString() const {
return ToString(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(Local<String>());
}


Local<Object> Value::ToObject() const {
return ToObject(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(Local<Object>());
}


Local<Integer> Value::ToInteger() const {
return ToInteger(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(Local<Integer>());
}


Boolean* Boolean::Cast(v8::Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
Expand Down
88 changes: 88 additions & 0 deletions src/api.cc
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2181,6 +2181,10 @@ int PrimitiveArray::Length() const {
return array->length();
}

void PrimitiveArray::Set(int index, Local<Primitive> item) {
return Set(Isolate::GetCurrent(), index, item);
}

void PrimitiveArray::Set(Isolate* v8_isolate, int index,
Local<Primitive> item) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
Expand All @@ -2194,6 +2198,10 @@ void PrimitiveArray::Set(Isolate* v8_isolate, int index,
array->set(index, *i_item);
}

Local<Primitive> PrimitiveArray::Get(int index) {
return Get(Isolate::GetCurrent(), index);
}

Local<Primitive> PrimitiveArray::Get(Isolate* v8_isolate, int index) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
i::Handle<i::FixedArray> array = Utils::OpenHandle(this);
Expand Down Expand Up @@ -2899,6 +2907,10 @@ void Message::PrintCurrentStackTrace(Isolate* isolate, FILE* out) {

// --- S t a c k T r a c e ---

Local<StackFrame> StackTrace::GetFrame(uint32_t index) const {
return GetFrame(Isolate::GetCurrent(), index);
}

Local<StackFrame> StackTrace::GetFrame(Isolate* v8_isolate,
uint32_t index) const {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
Expand Down Expand Up @@ -3858,6 +3870,36 @@ void v8::RegExp::CheckCast(v8::Value* that) {
}


bool Value::BooleanValue() const {
return BooleanValue(Isolate::GetCurrent()->GetCurrentContext())
.FromJust();
}


double Value::NumberValue() const {
return NumberValue(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(std::numeric_limits<double>::quiet_NaN());
}


int64_t Value::IntegerValue() const {
return NumberValue(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(0);
}


uint32_t Value::Uint32Value() const {
return Uint32Value(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(0);
}


int32_t Value::Int32Value() const {
return Int32Value(Isolate::GetCurrent()->GetCurrentContext())
.FromMaybe(0);
}


Maybe<bool> Value::BooleanValue(Local<Context> context) const {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(context->GetIsolate());
return Just(Utils::OpenHandle(this)->BooleanValue(isolate));
Expand Down Expand Up @@ -3946,6 +3988,12 @@ MaybeLocal<Uint32> Value::ToArrayIndex(Local<Context> context) const {
}


bool Value::Equals(Local<Value> that) const {
return Equals(Isolate::GetCurrent()->GetCurrentContext(), that)
.FromMaybe(false);
}


Maybe<bool> Value::Equals(Local<Context> context, Local<Value> that) const {
i::Isolate* isolate = Utils::OpenHandle(*context)->GetIsolate();
auto self = Utils::OpenHandle(this);
Expand Down Expand Up @@ -5269,6 +5317,10 @@ bool String::ContainsOnlyOneByte() const {
return helper.Check(*str);
}

int String::Utf8Length() const {
return Utf8Length(Isolate::GetCurrent());
}

int String::Utf8Length(Isolate* isolate) const {
i::Handle<i::String> str = Utils::OpenHandle(this);
str = i::String::Flatten(reinterpret_cast<i::Isolate*>(isolate), str);
Expand Down Expand Up @@ -5421,6 +5473,14 @@ static int WriteUtf8Impl(i::Vector<const Char> string, char* write_start,
}
} // anonymous namespace


int String::WriteUtf8(char* buffer, int capacity,
int* nchars_ref, int options) const {
return WriteUtf8(Isolate::GetCurrent(),
buffer, capacity, nchars_ref, options);
}


int String::WriteUtf8(Isolate* v8_isolate, char* buffer, int capacity,
int* nchars_ref, int options) const {
i::Handle<i::String> str = Utils::OpenHandle(this);
Expand Down Expand Up @@ -5461,6 +5521,18 @@ static inline int WriteHelper(i::Isolate* isolate, const String* string,
}


int String::WriteOneByte(uint8_t* buffer, int start,
int length, int options) const {
return WriteOneByte(Isolate::GetCurrent(), buffer, start, length, options);
}


int String::Write(uint16_t* buffer, int start, int length,
int options) const {
return Write(Isolate::GetCurrent(), buffer, start, length, options);
}


int String::WriteOneByte(Isolate* isolate, uint8_t* buffer, int start,
int length, int options) const {
return WriteHelper(reinterpret_cast<i::Isolate*>(isolate), this, buffer,
Expand Down Expand Up @@ -6430,6 +6502,11 @@ MaybeLocal<String> String::NewFromTwoByte(Isolate* isolate,
return result;
}

Local<String> v8::String::Concat(Local<String> left,
Local<String> right) {
return Concat(Isolate::GetCurrent(), left, right);
}

Local<String> v8::String::Concat(Isolate* v8_isolate, Local<String> left,
Local<String> right) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
Expand Down Expand Up @@ -6713,6 +6790,11 @@ bool v8::BooleanObject::ValueOf() const {
}


Local<v8::Value> v8::StringObject::New(Local<String> value) {
return New(Isolate::GetCurrent(), value);
}


Local<v8::Value> v8::StringObject::New(Isolate* v8_isolate,
Local<String> value) {
i::Handle<i::String> string = Utils::OpenHandle(*value);
Expand Down Expand Up @@ -8925,6 +9007,9 @@ bool MicrotasksScope::IsRunningMicrotasks(Isolate* v8Isolate) {
return isolate->default_microtask_queue()->IsRunningMicrotasks();
}

String::Utf8Value::Utf8Value(v8::Local<v8::Value> obj)
: Utf8Value(Isolate::GetCurrent(), obj) {}

String::Utf8Value::Utf8Value(v8::Isolate* isolate, v8::Local<v8::Value> obj)
: str_(nullptr), length_(0) {
if (obj.IsEmpty()) return;
Expand All @@ -8944,6 +9029,9 @@ String::Utf8Value::~Utf8Value() {
i::DeleteArray(str_);
}

String::Value::Value(v8::Local<v8::Value> obj)
: Value(Isolate::GetCurrent(), obj) {}

String::Value::Value(v8::Isolate* isolate, v8::Local<v8::Value> obj)
: str_(nullptr), length_(0) {
if (obj.IsEmpty()) return;
Expand Down

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