gzip_streambuf.h

#ifndef SOURCEMETA_CORE_GZIP_STREAMBUF_H_
#define SOURCEMETA_CORE_GZIP_STREAMBUF_H_
 
#ifndef SOURCEMETA_CORE_GZIP_EXPORT
#include <sourcemeta/core/gzip_export.h>
#endif
 
#include <istream>   // std::istream
#include <memory>    // std::unique_ptr
#include <streambuf> // std::streambuf
 
namespace sourcemeta::core {

class SOURCEMETA_CORE_GZIP_EXPORT GZIPStreamBuffer : public std::streambuf {
public:
  GZIPStreamBuffer(std::istream &compressed_stream);
  ~GZIPStreamBuffer() override;
 
  GZIPStreamBuffer(const GZIPStreamBuffer &) = delete;
  auto operator=(const GZIPStreamBuffer &) -> GZIPStreamBuffer & = delete;
  GZIPStreamBuffer(GZIPStreamBuffer &&) = delete;
  auto operator=(GZIPStreamBuffer &&) -> GZIPStreamBuffer & = delete;
 
protected:
  auto underflow() -> int_type override;
 
private:
// Exporting symbols that depends on the standard C++ library is considered
// safe.
// https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
#if defined(_MSC_VER)
#pragma warning(disable : 4251)
#endif
  struct Internal;
  std::unique_ptr<Internal> internal;
#if defined(_MSC_VER)
#pragma warning(default : 4251)
#endif
};
 
} // namespace sourcemeta::core
 
#endif