/**
 *    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/base/data_type.h"

#include "mongo/util/str.h"

namespace mongo {

namespace {

Status makeStoreStatus(const StringData& sdata, size_t length, std::ptrdiff_t debug_offset) {
    str::stream ss;
    ss << "buffer size too small to write StringData(" << sdata.size() << ") bytes into buffer["
       << length << "] at offset: " << debug_offset;
    return Status(ErrorCodes::Overflow, ss);
}
}  // namespace

Status DataType::Handler<StringData>::load(StringData* sdata,
                                           const char* ptr,
                                           size_t length,
                                           size_t* advanced,
                                           std::ptrdiff_t debug_offset) {
    if (sdata) {
        *sdata = StringData(ptr, length);
    }

    if (advanced) {
        *advanced = length;
    }

    return Status::OK();
}

Status DataType::Handler<StringData>::store(const StringData& sdata,
                                            char* ptr,
                                            size_t length,
                                            size_t* advanced,
                                            std::ptrdiff_t debug_offset) {
    if (sdata.size() > length) {
        return makeStoreStatus(sdata, length, debug_offset);
    }

    if (ptr) {
        std::memcpy(ptr, sdata.rawData(), sdata.size());
    }

    if (advanced) {
        *advanced = sdata.size();
    }

    return Status::OK();
}

}  // namespace mongo