gecko-dev/xpcom/string/nsTString.cpp

48 lines
1.5 KiB
C++

/* -*- 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);
AssertValidDependentString();
}