text: /**
   * Copyright (C) 2015 MongoDB Inc.
   *
   * This program is free software: you can redistribute it and/or  modify
   * it under the terms of the GNU Affero General Public License, version 3,
   * as published by the Free Software Foundation.
   *
   * This program 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   * As a special exception, the copyright holders give permission to link the
   * code of portions of this program with the OpenSSL library under certain
   * conditions as described in each individual source file and distribute
   * linked combinations including the program with the OpenSSL library. You
   * must comply with the GNU Affero General Public License in all respects
   * for all of the code used other than as permitted herein. If you modify
   * file(s) with this exception, you may extend this exception to your
   * version of the file(s), but you are not obligated to do so. If you do not
   * wish to do so, delete this exception statement from your version. If you
   * delete this exception statement from all source files in the program,
   * then also delete it in the license file.
   */
  
  #include "mongol/platform/basic.h"
  
  #include "mongol/scripting/mozjs/jsstringwrapper.h"
  
  #include <js/CharacterEncoding.h>
  #include <jsapi.h>
  #include <utility>
  
  #include "mongol/base/error_codes.h"
  #include "mongol/scripting/mozjs/exception.h"
  #include "mongol/util/assert_util.h"
  
  namespace mongol {
  namespace mozjs {
  
  JSStringWrapper::JSStringWrapper(std::int32_t value) : _isSet(true) {
      _length = sprintf(_buf, "%d", value);
  }
  
  JSStringWrapper::JSStringWrapper(JSContext* cx, JSString* str) : _isSet(true) {
      if (!str)
          throwCurrentJSException(cx, ErrorCodes::InternalError, "Cannot encode null JSString");
  
      // We have to do this flatstring thing because no public api tells us
      // how long the utf8 strings we get out are.
      //
      // Well, at least js/CharacterEncoding's GetDeflatedUTF8StringLength
      // and JS_flattenString are all in the public headers...
      JSFlatString* flat = JS_FlattenString(cx, str);
      if (!flat)
          throwCurrentJSException(cx, ErrorCodes::InternalError, "Failed to flatten JSString");
  
      _length = JS::GetDeflatedUTF8StringLength(flat);
  
      char* out;
      if (_length < sizeof(_buf)) {
          out = _buf;
      } else {
          _str.reset(new char[_length + 1]);
          out = _str.get();
      }
  
      JS::DeflateStringToUTF8Buffer(flat, mozilla::RangedPtr<char>(out, _length));
      out[_length] = '\0';
  }
  
  #if defined(_MSC_VER) && _MSC_VER < 1900
  JSStringWrapper::JSStringWrapper(JSStringWrapper&& other) {
      *this = std::move(other);
  }
  
  JSStringWrapper& JSStringWrapper::operator=(JSStringWrapper&& other) {
      _str = std::move(other._str);
      _length = other._length;
      std::memcpy(_buf, other._buf, sizeof(_buf));
      _isSet = other._isSet;
      return *this;
  }
  #endif
  
  StringData JSStringWrapper::toStringData() const {
      invariant(_isSet);
      return StringData(_str ? _str.get() : _buf, _length);
  }
  
  std::string JSStringWrapper::toString() const {
      return toStringData().toString();
  }
  
  JSStringWrapper::operator bool() const {
      return _isSet;
  }
  
  }  // namespace mozjs
  }  // namespace mongol
  