C++ ConstIterator::data方法代码示例

ByteVector APE::Item::render() const
{
  ByteVector data;
  TagLib::uint flags = ((d->readOnly) ? 1 : 0) | (d->type << 1);
  ByteVector value;

  if(isEmpty())
    return data;

  if(d->type == Text) {
    StringList::ConstIterator it = d->text.begin();

    value.append(it->data(String::UTF8));
    it++;
    for(; it != d->text.end(); ++it) {
      value.append('\0');
      value.append(it->data(String::UTF8));
    }
    d->value = value;
  }
  else
    value.append(d->value);

  data.append(ByteVector::fromUInt(value.size(), false));
  data.append(ByteVector::fromUInt(flags, false));
  data.append(d->key.data(String::UTF8));
  data.append(ByteVector('\0'));
  data.append(value);

  return data;
}

ByteVector
MP4::Tag::renderText(const ByteVector &name, const MP4::Item &item, int flags) const
{
  ByteVectorList data;
  StringList value = item.toStringList();
  for(StringList::ConstIterator it = value.begin(); it != value.end(); ++it) {
    data.append(it->data(String::UTF8));
  }
  return renderData(name, flags, data);
}

int APE::Item::size() const
{
  // SFB: Why is d->key.size() used when size() returns the length in UniChars and not UTF-8?
  int result = 8 + d->key.size() /* d->key.data(String::UTF8).size() */ + 1;
  switch (d->type) {
    case Text:
      if(d->text.size()) {
        StringList::ConstIterator it = d->text.begin();
		  
        result += it->data(String::UTF8).size();
        it++;
        for(; it != d->text.end(); ++it)
          result += 1 + it->data(String::UTF8).size();
      }
      break;

    case Binary:
    case Locator:
      result += d->value.size();
      break;
  }
  return result;
}

void ID3v2::Tag::removeUnsupportedProperties(const StringList &properties)
{
  for(StringList::ConstIterator it = properties.begin(); it != properties.end(); ++it){
    if(it->startsWith("UNKNOWN/")) {
      String frameID = it->substr(String("UNKNOWN/").size());
      if(frameID.size() != 4)
        continue; // invalid specification
      ByteVector id = frameID.data(String::Latin1);
      // delete all unknown frames of given type
      FrameList l = frameList(id);
      for(FrameList::ConstIterator fit = l.begin(); fit != l.end(); fit++)
        if (dynamic_cast<const UnknownFrame *>(*fit) != 0)
          removeFrame(*fit);
    }
    else if(it->size() == 4){
      ByteVector id = it->data(String::Latin1);
      removeFrames(id);
    }
    else {
      ByteVector id = it->substr(0,4).data(String::Latin1);
      if(it->size() <= 5)
        continue; // invalid specification
      String description = it->substr(5);
      Frame *frame = 0;
      if(id == "TXXX")
        frame = UserTextIdentificationFrame::find(this, description);
      else if(id == "WXXX")
        frame = UserUrlLinkFrame::find(this, description);
      else if(id == "COMM")
        frame = CommentsFrame::findByDescription(this, description);
      else if(id == "USLT")
        frame = UnsynchronizedLyricsFrame::findByDescription(this, description);
      else if(id == "UFID")
        frame = UniqueFileIdentifierFrame::findByOwner(this, description);
      if(frame)
        removeFrame(frame);
    }
  }
}

ByteVector
MP4::Tag::renderFreeForm(const String &name, const MP4::Item &item) const
{
  StringList header = StringList::split(name, ":");
  if(header.size() != 3) {
    debug("MP4: Invalid free-form item name \"" + name + "\"");
    return ByteVector();
  }
  ByteVector data;
  data.append(renderAtom("mean", ByteVector::fromUInt(0) + header[1].data(String::UTF8)));
  data.append(renderAtom("name", ByteVector::fromUInt(0) + header[2].data(String::UTF8)));
  AtomDataType type = item.atomDataType();
  if(type == TypeUndefined) {
    if(!item.toStringList().isEmpty()) {
      type = TypeUTF8;
    }
    else {
      type = TypeImplicit;
    }
  }
  if(type == TypeUTF8) {
    StringList value = item.toStringList();
    for(StringList::ConstIterator it = value.begin(); it != value.end(); ++it) {
      data.append(renderAtom("data", ByteVector::fromUInt(type) + ByteVector(4, '\0') + it->data(String::UTF8)));
    }
  }
  else {
    ByteVectorList value = item.toByteVectorList();
    for(ByteVectorList::ConstIterator it = value.begin(); it != value.end(); ++it) {
      data.append(renderAtom("data", ByteVector::fromUInt(type) + ByteVector(4, '\0') + *it));
    }
  }
  return renderAtom("----", data);
}