/***************************************************************************
    copyright            : (C) 2015 by Tsuda Kageyu
    email                : tsuda.kageyu@gmail.com
 ***************************************************************************/

/***************************************************************************
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful, but   *
 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the Free Software   *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA         *
 *   02110-1301  USA                                                       *
 *                                                                         *
 *   Alternatively, this file is available under the Mozilla Public        *
 *   License Version 1.1.  You may obtain a copy of the License at         *
 *   http://www.mozilla.org/MPL/                                           *
 ***************************************************************************/

#ifndef TAGLIB_ASFUTILS_H
#define TAGLIB_ASFUTILS_H

// THIS FILE IS NOT A PART OF THE TAGLIB API

#ifndef DO_NOT_DOCUMENT  // tell Doxygen not to document this header

namespace Strawberry_TagLib {
namespace TagLib {
namespace ASF {
namespace {

inline unsigned short readWORD(File *file, bool *ok = nullptr) {
  const ByteVector v = file->readBlock(2);
  if (v.size() != 2) {
    if (ok) *ok = false;
    return 0;
  }
  if (ok) *ok = true;
  return v.toUInt16LE(0);
}

inline unsigned int readDWORD(File *file, bool *ok = nullptr) {
  const ByteVector v = file->readBlock(4);
  if (v.size() != 4) {
    if (ok) *ok = false;
    return 0;
  }
  if (ok) *ok = true;
  return v.toUInt32LE(0);
}

inline long long readQWORD(File *file, bool *ok = nullptr) {
  const ByteVector v = file->readBlock(8);
  if (v.size() != 8) {
    if (ok) *ok = false;
    return 0;
  }
  if (ok) *ok = true;
  return v.toInt64LE(0);
}

inline String readString(File *file, int length) {

  ByteVector data = file->readBlock(length);
  size_t size = data.size();
  while (size >= 2) {
    if (data[size - 1] != '\0' || data[size - 2] != '\0') {
      break;
    }
    size -= 2;
  }
  if (size != data.size()) {
    data.resize(size);
  }
  return String(data, String::UTF16LE);

}

inline ByteVector renderString(const String &str, bool includeLength = false) {
  ByteVector data = str.data(String::UTF16LE) + ByteVector::fromUInt16LE(0);
  if (includeLength) {
    data = ByteVector::fromUInt16LE(data.size()) + data;
  }
  return data;
}

}  // namespace
}  // namespace ASF
}  // namespace TagLib
}  // namespace Strawberry_TagLib

#endif

#endif