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#ifndef WIT_LIB_LZMA_H
#define WIT_LIB_LZMA_H 1

#define _GNU_SOURCE 1

#include "lib-std.h"
#include "lib-sf.h"

//
///////////////////////////////////////////////////////////////////////////////
///////////////			definitions			///////////////
///////////////////////////////////////////////////////////////////////////////

typedef struct EncLZMA_t
{
    void *		handle;		// lzma handle
    u8			enc_props[8];	// encoded properties
    size_t		enc_props_len;	// used length of 'enc_props'
    int			compr_level;	// active compression level
    ccp			error_object;	// object name for error messages

} EncLZMA_t;

//
///////////////////////////////////////////////////////////////////////////////
///////////////			LZMA helpers			///////////////
///////////////////////////////////////////////////////////////////////////////

ccp GetMessageLZMA
(
    int			err,		// error code
    ccp			unkown_error	// result for unkown error codes
);

//-----------------------------------------------------------------------------

void InitializeLZMA
(
    EncLZMA_t		* lzma		// valid object to initialize
);

//-----------------------------------------------------------------------------

int CalcCompressionLevelLZMA
(
    int			compr_level	// valid are 1..9 / 0: use default value
);

//-----------------------------------------------------------------------------

u32 CalcMemoryUsageLZMA
(
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		is_writing	// false: reading mode, true: writing mode
);

//-----------------------------------------------------------------------------

u32 CalcMemoryUsageLZMA2
(
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		is_writing	// false: reading mode, true: writing mode
);

//
///////////////////////////////////////////////////////////////////////////////
///////////////		   LZMA encoding (compression)		///////////////
///////////////////////////////////////////////////////////////////////////////

enumError EncLZMA_Open
(
    EncLZMA_t		* lzma,		// object, will be initialized
    ccp			error_object,	// object name for error messages
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_endmark	// true: write end marker at end of stream
);

//-----------------------------------------------------------------------------

enumError EncLZMA_WriteDataToFile
(
    EncLZMA_t		* lzma,		// valid pointer, opened with EncLZMA_Open()
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    bool		write_props,	// true: write encoding properties
    const void		* data,		// data to write
    size_t		data_size,	// size of data to write
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA_WriteList2File
(
    EncLZMA_t		* lzma,		// valid pointer, opened with EncLZMA_Open()
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    bool		write_props,	// true: write encoding properties
    DataList_t		* data_list,	// NULL or data list (modified)
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA_Close
(
    EncLZMA_t		* lzma		// valid pointer
);

//-----------------------------------------------------------------------------

enumError EncLZMA_Data2File // open + write + close lzma stream
(
    EncLZMA_t		* lzma,		// if NULL: use internal structure
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_props,	// true: write encoding properties
    bool		write_endmark,	// true: write end marker at end of stream
    const void		* data,		// data to write
    size_t		data_size,	// size of data to write
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA_List2File // open + write + close lzma stream
(
    EncLZMA_t		* lzma,		// if NULL: use internal structure
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_props,	// true: write encoding properties
    bool		write_endmark,	// true: write end marker at end of stream
    DataList_t		* data_list,	// NULL or data list (modified)
    u32			* bytes_written	// not NULL: store written bytes
);

//
///////////////////////////////////////////////////////////////////////////////
///////////////		 LZMA decoding (decompression)		///////////////
///////////////////////////////////////////////////////////////////////////////

enumError DecLZMA_File2Buf // open + read + close lzma stream
(
    SuperFile_t		* file,		// source file and progress support
					//  -> read from 'file->f' at current offset
    size_t		read_count,	// not NULL: max bytes to read from file
    void		* buf,		// destination buffer
    size_t		buf_size,	// size of destination buffer
    u32			* bytes_written,// not NULL: store bytes written to buf
    u8			* enc_props	// Encoding properties
					// If NULL: read it from file
);

//
///////////////////////////////////////////////////////////////////////////////
///////////////		   LZMA2 encoding (compression)		///////////////
///////////////////////////////////////////////////////////////////////////////

enumError EncLZMA2_Open
(
    EncLZMA_t		* lzma,		// object, will be initialized
    ccp			error_object,	// object name for error messages
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_endmark	// true: write end marker at end of stream
);

//-----------------------------------------------------------------------------

enumError EncLZMA2_WriteDataToFile
(
    EncLZMA_t		* lzma,		// valid pointer, opened with EncLZMA2_Open()
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    bool		write_props,	// true: write encoding properties
    const void		* data,		// data to write
    size_t		data_size,	// size of data to write
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA2_WriteList2File
(
    EncLZMA_t		* lzma,		// valid pointer, opened with EncLZMA2_Open()
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    bool		write_props,	// true: write encoding properties
    DataList_t		* data_list,	// NULL or data list (modified)
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA2_Close
(
    EncLZMA_t		* lzma		// valid pointer
);

//-----------------------------------------------------------------------------

enumError EncLZMA2_Data2File // open + write + close lzma stream
(
    EncLZMA_t		* lzma,		// if NULL: use internal structure
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_props,	// true: write encoding properties
    bool		write_endmark,	// true: write end marker at end of stream
    const void		* data,		// data to write
    size_t		data_size,	// size of data to write
    u32			* bytes_written	// not NULL: store written bytes
);

//-----------------------------------------------------------------------------

enumError EncLZMA2_List2File // open + write + close lzma stream
(
    EncLZMA_t		* lzma,		// if NULL: use internal structure
    SuperFile_t		* file,		// destination file and progress support
					//  -> write to 'file->f' at current offset
    int			compr_level,	// valid are 1..9 / 0: use default value
    bool		write_props,	// true: write encoding properties
    bool		write_endmark,	// true: write end marker at end of stream
    DataList_t		* data_list,	// NULL or data list (modified)
    u32			* bytes_written	// not NULL: store written bytes
);

//
///////////////////////////////////////////////////////////////////////////////
///////////////		 LZMA2 decoding (decompression)		///////////////
///////////////////////////////////////////////////////////////////////////////

enumError DecLZMA2_File2Buf // open + read + close lzma stream
(
    SuperFile_t		* file,		// source file and progress support
					//  -> read from 'file->f' at current offset
    size_t		read_count,	// not NULL: max bytes to read from file
    void		* buf,		// destination buffer
    size_t		buf_size,	// size of destination buffer
    u32			* bytes_written,// not NULL: store bytes written to buf
    u8			* enc_props	// Encoding properties
					// If NULL: read it from file
);

//
///////////////////////////////////////////////////////////////////////////////
///////////////				END			///////////////
///////////////////////////////////////////////////////////////////////////////

#endif // WIT_LIB_LZMA_H 1
