Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/gzip.h

@@ -0,0 +1,144 @@
+// gzip.h - originally written and placed in the public domain by Wei Dai
+
+/// \file gzip.h
+/// \brief GZIP compression and decompression (RFC 1952)
+
+#ifndef CRYPTOPP_GZIP_H
+#define CRYPTOPP_GZIP_H
+
+#include "cryptlib.h"
+#include "zdeflate.h"
+#include "zinflate.h"
+#include "crc.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief GZIP Compression (RFC 1952)
+class Gzip : public Deflator
+{
+public:
+	/// \brief Construct a Gzip compressor
+	/// \param attachment an attached transformation
+	/// \param deflateLevel the deflate level
+	/// \param log2WindowSize the window size
+	/// \param detectUncompressible flag to detect if data is compressible
+	/// \details detectUncompressible makes it faster to process uncompressible files, but
+	///   if a file has both compressible and uncompressible parts, it may fail to compress
+	///   some of the compressible parts.
+	Gzip(BufferedTransformation *attachment=NULLPTR, unsigned int deflateLevel=DEFAULT_DEFLATE_LEVEL, unsigned int log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, bool detectUncompressible=true)
+		: Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible), m_totalLen(0), m_filetime(0) { }
+
+	/// \brief Construct a Gzip compressor
+	/// \param parameters a set of NameValuePairs to initialize this object
+	/// \param attachment an attached transformation
+	/// \details Possible parameter names: Log2WindowSize, DeflateLevel, DetectUncompressible
+	Gzip(const NameValuePairs &parameters, BufferedTransformation *attachment=NULLPTR)
+		: Deflator(parameters, attachment), m_totalLen(0), m_filetime(0)
+	{
+		IsolatedInitialize(parameters);
+	}
+
+	/// \param filetime the filetime to set in the header. The application is responsible for setting it.
+	void SetFiletime(word32 filetime) { m_filetime = filetime; }
+
+	/// \param filename the original filename to set in the header. The application is responsible for setting it.
+	///        RFC 1952 requires a ISO/IEC 8859-1 encoding.
+	/// \param throwOnEncodingError if throwOnEncodingError is true, then the filename is checked to ensure it is
+	///        ISO/IEC 8859-1 encoded. If the filename does not adhere to ISO/IEC 8859-1, then a InvalidDataFormat
+	///        is thrown. If throwOnEncodingError is false then the filename is not checked.
+	void SetFilename(const std::string& filename, bool throwOnEncodingError = false);
+
+	/// \param comment the comment to set in the header. The application is responsible for setting it.
+	///        RFC 1952 requires a ISO/IEC 8859-1 encoding.
+	/// \param throwOnEncodingError if throwOnEncodingError is true, then the comment is checked to ensure it is
+	///        ISO/IEC 8859-1 encoded. If the comment does not adhere to ISO/IEC 8859-1, then a InvalidDataFormat
+	///        is thrown. If throwOnEncodingError is false then the comment is not checked.
+	void SetComment(const std::string& comment, bool throwOnEncodingError = false);
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+
+protected:
+	enum {MAGIC1=0x1f, MAGIC2=0x8b,   // flags for the header
+		  DEFLATED=8, FAST=4, SLOW=2};
+
+	enum FLAG_MASKS {
+		FILENAME=8, COMMENTS=16};
+
+	void WritePrestreamHeader();
+	void ProcessUncompressedData(const byte *string, size_t length);
+	void WritePoststreamTail();
+
+	word32 m_totalLen;
+	CRC32 m_crc;
+
+	word32 m_filetime;
+	std::string m_filename;
+	std::string m_comment;
+};
+
+/// \brief GZIP Decompression (RFC 1952)
+class Gunzip : public Inflator
+{
+public:
+	typedef Inflator::Err Err;
+
+	/// \brief Exception thrown when a header decoding error occurs
+	class HeaderErr : public Err {public: HeaderErr() : Err(INVALID_DATA_FORMAT, "Gunzip: header decoding error") {}};
+	/// \brief Exception thrown when the tail is too short
+	class TailErr : public Err {public: TailErr() : Err(INVALID_DATA_FORMAT, "Gunzip: tail too short") {}};
+	/// \brief Exception thrown when a CRC error occurs
+	class CrcErr : public Err {public: CrcErr() : Err(DATA_INTEGRITY_CHECK_FAILED, "Gunzip: CRC check error") {}};
+	/// \brief Exception thrown when a length error occurs
+	class LengthErr : public Err {public: LengthErr() : Err(DATA_INTEGRITY_CHECK_FAILED, "Gunzip: length check error") {}};
+
+	/// \brief Construct a Gunzip decompressor
+	/// \param attachment an attached transformation
+	/// \param repeat decompress multiple compressed streams in series
+	/// \param autoSignalPropagation 0 to turn off MessageEnd signal
+	Gunzip(BufferedTransformation *attachment = NULLPTR, bool repeat = false, int autoSignalPropagation = -1);
+
+	/// \return the filetime of the stream as set in the header. The application is responsible for setting it on the decompressed file.
+	word32 GetFiletime() const { return m_filetime; }
+
+	/// \return the filename of the stream as set in the header. The application is responsible for setting it on the decompressed file.
+	/// \param throwOnEncodingError if throwOnEncodingError is true, then the filename is checked to ensure it is
+	///        ISO/IEC 8859-1 encoded. If the filename does not adhere to ISO/IEC 8859-1, then a InvalidDataFormat is thrown.
+	///        If throwOnEncodingError is false then the filename is not checked.
+	const std::string& GetFilename(bool throwOnEncodingError = false) const;
+
+	/// \return the comment of the stream as set in the header.
+	/// \param throwOnEncodingError if throwOnEncodingError is true, then the comment is checked to ensure it is
+	///        ISO/IEC 8859-1 encoded. If the comment does not adhere to ISO/IEC 8859-1, then a InvalidDataFormat is thrown.
+	///        If throwOnEncodingError is false then the comment is not checked.
+	const std::string& GetComment(bool throwOnEncodingError = false) const;
+
+protected:
+	enum {
+		/// \brief First header magic value
+		MAGIC1=0x1f,
+		/// \brief Second header magic value
+		MAGIC2=0x8b,
+		/// \brief Deflated flag
+		DEFLATED=8
+	};
+
+	enum FLAG_MASKS {
+		CONTINUED=2, EXTRA_FIELDS=4, FILENAME=8, COMMENTS=16, ENCRYPTED=32};
+
+	unsigned int MaxPrestreamHeaderSize() const {return 1024;}
+	void ProcessPrestreamHeader();
+	void ProcessDecompressedData(const byte *string, size_t length);
+	unsigned int MaxPoststreamTailSize() const {return 8;}
+	void ProcessPoststreamTail();
+
+	word32 m_length;
+	CRC32 m_crc;
+
+	word32 m_filetime;
+	std::string m_filename;
+	std::string m_comment;
+};
+
+NAMESPACE_END
+
+#endif