extensions/openpower-pels/section_factory.cpp

/**
 * Copyright © 2019 IBM Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "section_factory.hpp"

#include "failing_mtms.hpp"
#include "generic.hpp"
#include "pel_types.hpp"
#include "private_header.hpp"
#include "src.hpp"
#include "user_data.hpp"
#include "user_header.hpp"

namespace openpower
{
namespace pels
{
namespace section_factory
{
std::unique_ptr<Section> create(Stream& pelData)
{
    std::unique_ptr<Section> section;

    // Peek the section ID to create the appriopriate object.
    // If not enough data remains to do so, an invalid
    // Generic object will be created in the default case.
    uint16_t sectionID = 0;

    if (pelData.remaining() >= 2)
    {
        pelData >> sectionID;
        pelData.offset(pelData.offset() - 2);
    }

    switch (sectionID)
    {
        case static_cast<uint16_t>(SectionID::privateHeader):
            section = std::make_unique<PrivateHeader>(pelData);
            break;
        case static_cast<uint16_t>(SectionID::userData):
            section = std::make_unique<UserData>(pelData);
            break;
        case static_cast<uint16_t>(SectionID::userHeader):
            section = std::make_unique<UserHeader>(pelData);
            break;
        case static_cast<uint16_t>(SectionID::failingMTMS):
            section = std::make_unique<FailingMTMS>(pelData);
            break;
        case static_cast<uint16_t>(SectionID::primarySRC):
        case static_cast<uint16_t>(SectionID::secondarySRC):
            section = std::make_unique<SRC>(pelData);
            break;
        default:
            // A generic object, but at least an object.
            section = std::make_unique<Generic>(pelData);
            break;
    }

    return section;
}

} // namespace section_factory
} // namespace pels
} // namespace openpower