AlignmentPadding.h

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// Copyright 2015 Sensics, Inc.
//
// 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.

#ifndef INCLUDED_AlignmentPadding_h_GUID_B916398A_5714_44B8_455A_B38EA1092172
#define INCLUDED_AlignmentPadding_h_GUID_B916398A_5714_44B8_455A_B38EA1092172

// Internal Includes
// - none

// Library/third-party includes
// - none

// Standard includes
#include <stddef.h>

namespace osvr {
namespace common {
    inline size_t computeAlignmentPadding(size_t alignment,
                                          size_t currentSize) {
        size_t ret = 0;
        if (2 > alignment) {
            return ret;
        }
        auto leftover = currentSize % alignment;
        if (leftover == 0) {
            return ret;
        }
        ret = alignment - leftover;
        return ret;
    }
} // namespace common
} // namespace osvr

#endif // INCLUDED_AlignmentPadding_h_GUID_B916398A_5714_44B8_455A_B38EA1092172