/**
 *    Copyright (C) 2018-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    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 Server Side 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 "mongo/platform/basic.h"

#include "mongo/util/intrusive_counter.h"

#include "mongo/util/mongoutils/str.h"

namespace mongo {
using boost::intrusive_ptr;
using namespace mongoutils;

intrusive_ptr<const RCString> RCString::create(StringData s) {
    uassert(16493,
            str::stream() << "Tried to create string longer than "
                          << (BSONObjMaxUserSize / 1024 / 1024)
                          << "MB",
            s.size() < static_cast<size_t>(BSONObjMaxUserSize));

    const size_t sizeWithNUL = s.size() + 1;
    const size_t bytesNeeded = sizeof(RCString) + sizeWithNUL;

#pragma warning(push)
#pragma warning(disable : 4291)
    intrusive_ptr<RCString> ptr = new (bytesNeeded) RCString();  // uses custom operator new
#pragma warning(pop)

    ptr->_size = s.size();
    char* stringStart = reinterpret_cast<char*>(ptr.get()) + sizeof(RCString);
    s.copyTo(stringStart, true);

    return ptr;
}

}  // namespace mongo