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// Copyright 2013 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 "gin/converter.h"
#include "v8/include/v8.h"
using v8::ArrayBuffer;
using v8::Boolean;
using v8::External;
using v8::Function;
using v8::Int32;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Number;
using v8::Object;
using v8::String;
using v8::Uint32;
using v8::Value;
namespace {
template <typename T, typename U>
bool FromMaybe(Maybe<T> maybe, U* out) {
if (maybe.IsNothing())
return false;
*out = static_cast<U>(maybe.FromJust());
return true;
}
} // namespace
namespace gin {
Local<Value> Converter<bool>::ToV8(Isolate* isolate, bool val) {
return Boolean::New(isolate, val).As<Value>();
}
bool Converter<bool>::FromV8(Isolate* isolate, Local<Value> val, bool* out) {
return FromMaybe(val->BooleanValue(isolate->GetCurrentContext()), out);
}
Local<Value> Converter<int32_t>::ToV8(Isolate* isolate, int32_t val) {
return Integer::New(isolate, val).As<Value>();
}
bool Converter<int32_t>::FromV8(Isolate* isolate,
Local<Value> val,
int32_t* out) {
if (!val->IsInt32())
return false;
*out = val.As<Int32>()->Value();
return true;
}
Local<Value> Converter<uint32_t>::ToV8(Isolate* isolate, uint32_t val) {
return Integer::NewFromUnsigned(isolate, val).As<Value>();
}
bool Converter<uint32_t>::FromV8(Isolate* isolate,
Local<Value> val,
uint32_t* out) {
if (!val->IsUint32())
return false;
*out = val.As<Uint32>()->Value();
return true;
}
Local<Value> Converter<int64_t>::ToV8(Isolate* isolate, int64_t val) {
return Number::New(isolate, static_cast<double>(val)).As<Value>();
}
bool Converter<int64_t>::FromV8(Isolate* isolate,
Local<Value> val,
int64_t* out) {
if (!val->IsNumber())
return false;
// Even though IntegerValue returns int64_t, JavaScript cannot represent
// the full precision of int64_t, which means some rounding might occur.
return FromMaybe(val->IntegerValue(isolate->GetCurrentContext()), out);
}
Local<Value> Converter<uint64_t>::ToV8(Isolate* isolate, uint64_t val) {
return Number::New(isolate, static_cast<double>(val)).As<Value>();
}
bool Converter<uint64_t>::FromV8(Isolate* isolate,
Local<Value> val,
uint64_t* out) {
if (!val->IsNumber())
return false;
return FromMaybe(val->IntegerValue(isolate->GetCurrentContext()), out);
}
Local<Value> Converter<float>::ToV8(Isolate* isolate, float val) {
return Number::New(isolate, val).As<Value>();
}
bool Converter<float>::FromV8(Isolate* isolate, Local<Value> val, float* out) {
if (!val->IsNumber())
return false;
*out = static_cast<float>(val.As<Number>()->Value());
return true;
}
Local<Value> Converter<double>::ToV8(Isolate* isolate, double val) {
return Number::New(isolate, val).As<Value>();
}
bool Converter<double>::FromV8(Isolate* isolate,
Local<Value> val,
double* out) {
if (!val->IsNumber())
return false;
*out = val.As<Number>()->Value();
return true;
}
Local<Value> Converter<base::StringPiece>::ToV8(Isolate* isolate,
const base::StringPiece& val) {
return String::NewFromUtf8(isolate, val.data(),
v8::NewStringType::kNormal,
static_cast<uint32_t>(val.length()))
.ToLocalChecked();
}
Local<Value> Converter<std::string>::ToV8(Isolate* isolate,
const std::string& val) {
return Converter<base::StringPiece>::ToV8(isolate, val);
}
bool Converter<std::string>::FromV8(Isolate* isolate,
Local<Value> val,
std::string* out) {
if (!val->IsString())
return false;
Local<String> str = Local<String>::Cast(val);
int length = str->Utf8Length();
out->resize(length);
str->WriteUtf8(&(*out)[0], length, NULL, String::NO_NULL_TERMINATION);
return true;
}
bool Converter<Local<Function>>::FromV8(Isolate* isolate,
Local<Value> val,
Local<Function>* out) {
if (!val->IsFunction())
return false;
*out = Local<Function>::Cast(val);
return true;
}
Local<Value> Converter<Local<Object>>::ToV8(Isolate* isolate,
Local<Object> val) {
return val.As<Value>();
}
bool Converter<Local<Object>>::FromV8(Isolate* isolate,
Local<Value> val,
Local<Object>* out) {
if (!val->IsObject())
return false;
*out = Local<Object>::Cast(val);
return true;
}
Local<Value> Converter<Local<ArrayBuffer>>::ToV8(Isolate* isolate,
Local<ArrayBuffer> val) {
return val.As<Value>();
}
bool Converter<Local<ArrayBuffer>>::FromV8(Isolate* isolate,
Local<Value> val,
Local<ArrayBuffer>* out) {
if (!val->IsArrayBuffer())
return false;
*out = Local<ArrayBuffer>::Cast(val);
return true;
}
Local<Value> Converter<Local<External>>::ToV8(Isolate* isolate,
Local<External> val) {
return val.As<Value>();
}
bool Converter<Local<External>>::FromV8(Isolate* isolate,
v8::Local<Value> val,
Local<External>* out) {
if (!val->IsExternal())
return false;
*out = Local<External>::Cast(val);
return true;
}
Local<Value> Converter<Local<Value>>::ToV8(Isolate* isolate, Local<Value> val) {
return val;
}
bool Converter<Local<Value>>::FromV8(Isolate* isolate,
Local<Value> val,
Local<Value>* out) {
*out = val;
return true;
}
v8::Local<v8::String> StringToSymbol(v8::Isolate* isolate,
const base::StringPiece& val) {
return String::NewFromUtf8(isolate, val.data(),
v8::NewStringType::kInternalized,
static_cast<uint32_t>(val.length()))
.ToLocalChecked();
}
std::string V8ToString(v8::Local<v8::Value> value) {
if (value.IsEmpty())
return std::string();
std::string result;
if (!ConvertFromV8(NULL, value, &result))
return std::string();
return result;
}
} // namespace gin
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