image_int.hpp

// SPDX-License-Identifier: GPL-2.0-or-later
 
#ifndef IMAGE_INT_HPP_
#define IMAGE_INT_HPP_
 
// *****************************************************************************
// included header files
#include "slice.hpp"  // for Slice
 
#include <cstddef>  // for size_t
#include <cstdint>  // for int32_t
#include <ostream>  // for ostream, basic_ostream::put
#include <string>
 
#if defined(__MINGW32__)
#define ATTRIBUTE_FORMAT_PRINTF __attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
#elif defined(__GNUC__)
#define ATTRIBUTE_FORMAT_PRINTF __attribute__((format(printf, 1, 2)))
#else
#define ATTRIBUTE_FORMAT_PRINTF
#endif
 
// *****************************************************************************
// namespace extensions
namespace Exiv2::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) {
    auto 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 {
  constexpr binaryToStringHelper(Slice<T>&& myBuf) noexcept : buf_(std::move(myBuf)) {
  }
 
  // 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
  Slice<T> buf_;
};
 
template <typename T>
constexpr binaryToStringHelper<T> binaryToString(Slice<T>&& sl) noexcept {
  return binaryToStringHelper<T>(std::move(sl));
}
 
std::string indent(size_t i);
 
}  // namespace Exiv2::Internal
 
#endif  // #ifndef IMAGE_INT_HPP_