root/gin/converter.cc

DEFINITIONS

1. ToV8
2. FromV8
3. ToV8
4. FromV8
5. ToV8
6. FromV8
7. ToV8
8. FromV8
9. ToV8
10. FromV8
11. ToV8
12. FromV8
13. ToV8
14. FromV8
15. ToV8
16. ToV8
17. FromV8
18. FromV8
19. ToV8
20. FromV8
21. ToV8
22. FromV8
23. ToV8
24. FromV8
25. ToV8
26. FromV8
27. StringToSymbol
28. V8ToString

// 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::Handle;
using v8::Integer;
using v8::Isolate;
using v8::Number;
using v8::Object;
using v8::String;
using v8::Value;

namespace gin {

Handle<Value> Converter<bool>::ToV8(Isolate* isolate, bool val) {
  return Boolean::New(isolate, val).As<Value>();
}

bool Converter<bool>::FromV8(Isolate* isolate, Handle<Value> val, bool* out) {
  *out = val->BooleanValue();
  return true;
}

Handle<Value> Converter<int32_t>::ToV8(Isolate* isolate, int32_t val) {
  return Integer::New(isolate, val).As<Value>();
}

bool Converter<int32_t>::FromV8(Isolate* isolate, Handle<Value> val,
                                int32_t* out) {
  if (!val->IsNumber())
    return false;
  *out = val->Int32Value();
  return true;
}

Handle<Value> Converter<uint32_t>::ToV8(Isolate* isolate, uint32_t val) {
  return Integer::NewFromUnsigned(isolate, val).As<Value>();
}

bool Converter<uint32_t>::FromV8(Isolate* isolate, Handle<Value> val,
                                 uint32_t* out) {
  if (!val->IsNumber())
    return false;
  *out = val->Uint32Value();
  return true;
}

Handle<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, Handle<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.
  *out = val->IntegerValue();
  return true;
}

Handle<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, Handle<Value> val,
                                 uint64_t* out) {
  if (!val->IsNumber())
    return false;
  *out = static_cast<uint64_t>(val->IntegerValue());
  return true;
}

Handle<Value> Converter<float>::ToV8(Isolate* isolate, float val) {
  return Number::New(isolate, val).As<Value>();
}

bool Converter<float>::FromV8(Isolate* isolate, Handle<Value> val,
                              float* out) {
  if (!val->IsNumber())
    return false;
  *out = static_cast<float>(val->NumberValue());
  return true;
}

Handle<Value> Converter<double>::ToV8(Isolate* isolate, double val) {
  return Number::New(isolate, val).As<Value>();
}

bool Converter<double>::FromV8(Isolate* isolate, Handle<Value> val,
                               double* out) {
  if (!val->IsNumber())
    return false;
  *out = val->NumberValue();
  return true;
}

Handle<Value> Converter<base::StringPiece>::ToV8(
    Isolate* isolate, const base::StringPiece& val) {
  return String::NewFromUtf8(isolate, val.data(), String::kNormalString,
                             static_cast<uint32_t>(val.length()));
}

Handle<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, Handle<Value> val,
                                    std::string* out) {
  if (!val->IsString())
    return false;
  Handle<String> str = Handle<String>::Cast(val);
  int length = str->Utf8Length();
  out->resize(length);
  str->WriteUtf8(&(*out)[0], length, NULL, String::NO_NULL_TERMINATION);
  return true;
}

bool Converter<Handle<Function> >::FromV8(Isolate* isolate, Handle<Value> val,
                                          Handle<Function>* out) {
  if (!val->IsFunction())
    return false;
  *out = Handle<Function>::Cast(val);
  return true;
}

Handle<Value> Converter<Handle<Object> >::ToV8(Isolate* isolate,
                                               Handle<Object> val) {
  return val.As<Value>();
}

bool Converter<Handle<Object> >::FromV8(Isolate* isolate, Handle<Value> val,
                                        Handle<Object>* out) {
  if (!val->IsObject())
    return false;
  *out = Handle<Object>::Cast(val);
  return true;
}

Handle<Value> Converter<Handle<ArrayBuffer> >::ToV8(Isolate* isolate,
                                                    Handle<ArrayBuffer> val) {
  return val.As<Value>();
}

bool Converter<Handle<ArrayBuffer> >::FromV8(Isolate* isolate,
                                             Handle<Value> val,
                                             Handle<ArrayBuffer>* out) {
  if (!val->IsArrayBuffer())
    return false;
  *out = Handle<ArrayBuffer>::Cast(val);
  return true;
}

Handle<Value> Converter<Handle<External> >::ToV8(Isolate* isolate,
                                                 Handle<External> val) {
  return val.As<Value>();
}

bool Converter<Handle<External> >::FromV8(Isolate* isolate,
                                          v8::Handle<Value> val,
                                          Handle<External>* out) {
  if (!val->IsExternal())
    return false;
  *out = Handle<External>::Cast(val);
  return true;
}

Handle<Value> Converter<Handle<Value> >::ToV8(Isolate* isolate,
                                              Handle<Value> val) {
  return val;
}

bool Converter<Handle<Value> >::FromV8(Isolate* isolate, Handle<Value> val,
                                       Handle<Value>* out) {
  *out = val;
  return true;
}

v8::Handle<v8::String> StringToSymbol(v8::Isolate* isolate,
                                      const base::StringPiece& val) {
  return String::NewFromUtf8(isolate,
                             val.data(),
                             String::kInternalizedString,
                             static_cast<uint32_t>(val.length()));
}

std::string V8ToString(v8::Handle<v8::Value> value) {
  if (value.IsEmpty())
    return std::string();
  std::string result;
  if (!ConvertFromV8(NULL, value, &result))
    return std::string();
  return result;
}

}  // namespace gin