Method Utf8String

nan.h:1170–1224

class Utf8String {
 public:
  inline explicit Utf8String(v8::Local<v8::Value> from) :
      length_(0), str_(str_st_) {
    HandleScope scope;
    if (!from.IsEmpty()) {
#if NODE_MAJOR_VERSION >= 10
      v8::Local<v8::Context> context = GetCurrentContext();
      v8::Local<v8::String> string =
          from->ToString(context).FromMaybe(v8::Local<v8::String>());
#else
      v8::Local<v8::String> string = from->ToString();
#endif
      if (!string.IsEmpty()) {
        size_t len = 3 * string->Length() + 1;
        assert(len <= INT_MAX);
        if (len > sizeof (str_st_)) {
          str_ = static_cast<char*>(malloc(len));
          assert(str_ != 0);
        }
#if NODE_MAJOR_VERSION >= 11
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION > 13 ||                     \
  (V8_MAJOR_VERSION == 13 && defined(V8_MINOR_VERSION) && V8_MINOR_VERSION >= 4))
    length_ = string->WriteUtf8V2(v8::Isolate::GetCurrent(), str_,
                                    static_cast<int>(len), imp::kReplaceInvalidUtf8);
#else
    const int flags =
        v8::String::NO_NULL_TERMINATION | imp::kReplaceInvalidUtf8;
    length_ = string->WriteUtf8(v8::Isolate::GetCurrent(), str_,
                                    static_cast<int>(len), 0, flags);
#endif

#else
        // See https://github.com/nodejs/nan/issues/832.
        // Disable the warning as there is no way around it.
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4996)
#endif
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
  const int flags =
    v8::String::NO_NULL_TERMINATION | imp::kReplaceInvalidUtf8;
  length_ = string->WriteUtf8(str_, static_cast<int>(len), 0, flags);
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif  // NODE_MAJOR_VERSION < 11
        str_[length_] = '\0';
      }
    }
  }

  inline int length() const {
    return length_;