i2pd/libi2pd/Gzip.h

/*
* Copyright (c) 2013-2020, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/

#ifndef GZIP_H__
#define GZIP_H__

#include <zlib.h>
#include <vector>

namespace i2p
{
namespace data
{
	class GzipInflator
	{
		public:

			GzipInflator ();
			~GzipInflator ();

			size_t Inflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen);
			/** @note @a os failbit will be set in case of error */
			void Inflate (const uint8_t * in, size_t inLen, std::ostream& os);
			void Inflate (std::istream& in, std::ostream& out);

		private:

			z_stream m_Inflator;
			bool m_IsDirty;
	};

	class GzipDeflator
	{
		public:

			GzipDeflator ();
			~GzipDeflator ();

			void SetCompressionLevel (int level);
			size_t Deflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen);
			size_t Deflate (const std::vector<std::pair<const uint8_t *, size_t> >& bufs, uint8_t * out, size_t outLen);

		private:

			z_stream m_Deflator;
			bool m_IsDirty;
	};

	size_t GzipNoCompression (const uint8_t * in, uint16_t inLen, uint8_t * out, size_t outLen); // for < 64K
	size_t GzipNoCompression (const std::vector<std::pair<const uint8_t *, size_t> >& bufs, uint8_t * out, size_t outLen); // for total size < 64K
} // data
} // i2p

#endif /* GZIP_H__ */