gecko/xpcom/string/nsTString.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

nsTAdoptingString_CharT&
nsTAdoptingString_CharT::operator=(const self_type& str)
{
  // This'll violate the constness of this argument, that's just
  // the nature of this class...
  self_type* mutable_str = const_cast<self_type*>(&str);

  if (str.mFlags & F_OWNED) {
    // We want to do what Adopt() does, but without actually incrementing
    // the Adopt count.  Note that we can be a little more straightforward
    // about this than Adopt() is, because we know that str.mData is
    // non-null.  Should we be able to assert that str is not void here?
    NS_ASSERTION(str.mData, "String with null mData?");
    Finalize();
    mData = str.mData;
    mLength = str.mLength;
    SetDataFlags(F_TERMINATED | F_OWNED);

    // Make str forget the buffer we just took ownership of.
    new(mutable_str) self_type();
  } else {
    Assign(str);

    mutable_str->Truncate();
  }

  return *this;
}

void
nsTString_CharT::Rebind(const char_type* data, size_type length)
{
  // If we currently own a buffer, release it.
  Finalize();

  mData = const_cast<char_type*>(data);
  mLength = length;
  SetDataFlags(F_TERMINATED);
  AssertValidDepedentString();
}