image_int.hpp

// ***************************************************************** -*- C++ -*-
/*
 * Copyright (C) 2004-2021 Exiv2 authors
 * This program is part of the Exiv2 distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
 */
#ifndef IMAGE_INT_HPP_
#define IMAGE_INT_HPP_
 
// *****************************************************************************
// included header files
#include "types.hpp"
 
// + standard includes
#include <string>
 
#if (defined(__GNUG__) || defined(__GNUC__)) || defined(__clang__)
#define ATTRIBUTE_FORMAT_PRINTF __attribute__((format(printf, 1, 0)))
#else
#define ATTRIBUTE_FORMAT_PRINTF
#endif
 
// *****************************************************************************
// namespace extensions
namespace Exiv2 {
    namespace Internal {
 
// *****************************************************************************
// class definitions
 
    std::string stringFormat(const char* format, ...) ATTRIBUTE_FORMAT_PRINTF;
 
    template <typename T>
    struct binaryToStringHelper;
 
    template <typename T>
    std::ostream& operator<<(std::ostream& stream, const binaryToStringHelper<T>& binToStr)
    {
        for (size_t i = 0; i < binToStr.buf_.size(); ++i) {
            int c = static_cast<int>(binToStr.buf_.at(i));
            const bool bTrailingNull = c == 0 && i == binToStr.buf_.size() - 1;
            if (!bTrailingNull) {
                if (c < ' ' || c >= 127) {
                    c = '.';
                }
                stream.put(static_cast<char>(c));
            }
        }
        return stream;
    }
 
    template <typename T>
    struct binaryToStringHelper
    {
        explicit binaryToStringHelper(const Slice<T> buf) throw() : buf_(buf)
        {
        }
 
        friend std::ostream& operator<<<T>(std::ostream& stream, const binaryToStringHelper<T>& binToStr);
 
        // the Slice is stored by value to avoid dangling references, in case we
        // invoke:
        // binaryToString(makeSlice(buf, 0, n));
        // <- buf_ would be now dangling, were it a reference
        const Slice<T> buf_;
    };
 
    template <typename T>
    inline binaryToStringHelper<T> binaryToString(const Slice<T> sl) throw()
    {
        return binaryToStringHelper<T>(sl);
    }
 
    std::string binaryToHex(const byte *data, size_t size);
 
    std::string indent(int32_t depth);
 
}}                                      // namespace Internal, Exiv2
 
#endif                                  // #ifndef IMAGE_INT_HPP_