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/***************************************************************************
* _______ _______ _______ *
* | ___ |____ | ___ | *
* | | |_| / /| | |_| *
* | |_____ / / | |_____ *
* |_____ | / / |_____ | *
* _ | | / / _ | | *
* | |___| |/ /____| |___| | *
* |_______|_______|_______| *
* *
* Wiimms SZS Tools *
* https://szs.wiimm.de/ *
* *
***************************************************************************
* *
* This file is part of the SZS project. *
* Visit https://szs.wiimm.de/ for project details and sources. *
* *
* Copyright (c) 2011-2024 by Dirk Clemens <wiimm@wiimm.de> *
* *
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* See file gpl-2.0.txt or http://www.gnu.org/licenses/gpl-2.0.txt *
* *
***************************************************************************/
#ifndef SZS_LIB_LZMA_H
#define SZS_LIB_LZMA_H 1
#define _GNU_SOURCE 1
#include "lib-std.h"
//
///////////////////////////////////////////////////////////////////////////////
/////////////// definitions ///////////////
///////////////////////////////////////////////////////////////////////////////
#define LZMA_MAGIC_NUM3 0x5d0000 // 3 relevant bytes
#define XZ_MAGIC_NUM6 0xfd377a585a00ull // 6 relevant bytes
#define LZMA_DEFAULT_COMPR 6
//
///////////////////////////////////////////////////////////////////////////////
/////////////// helpers ///////////////
///////////////////////////////////////////////////////////////////////////////
int IsLZ
(
// returns
// -1: not LZ data
// 0: seems to be LZ; compression level is unknown
// 1..9: seems to be LZ; compression level is returned
cvp data, // NULL or data to investigate
uint size // size of 'data'
);
//-----------------------------------------------------------------------------
int IsLZMA
(
// returns
// -1: not LZMA data
// 0: seems to be LZMA data; compression level is unknown
// 1..9: seems to be LZMA data; compression level is returned
cvp data, // NULL or data to investigate
uint size // size of 'data'
);
//-----------------------------------------------------------------------------
int CalcCompressionLevelLZMA
(
int compr_level // valid are 1..9 / 0: use default value
);
//-----------------------------------------------------------------------------
int GetDicSizeByLevel ( int level );
int GetComprLevelLZMA ( u32 dict_size );
//-----------------------------------------------------------------------------
int IsXZ
(
// returns
// -1: not XZ data
// 0: seems to be LZMA data; compression level is unknown
// 1..9: seems to be LZMA data; compression level is returned
cvp data, // NULL or data to investigate
uint size // size of 'data'
);
//-----------------------------------------------------------------------------
ccp GetMessageLZMA
(
int err, // error code
ccp unkown_error // result for unkown error codes
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// Encode LZMA ///////////////
///////////////////////////////////////////////////////////////////////////////
enumError EncodeLZMAbuf
(
void *dest, // valid destination buffer
uint dest_size, // size of 'dest'
uint *dest_written, // store num bytes written to 'dest', never NULL
const void *src, // source buffer
uint src_size, // size of source buffer
int compr_level, // valid are 1..9 / 0: use default value
bool add_dec_size // true: add decompressed size
);
//-----------------------------------------------------------------------------
enumError EncodeLZMA
(
u8 **dest_ptr, // result: store destination buffer addr
uint *dest_written, // store num bytes written to 'dest', never NULL
bool use_iobuf, // true: allow the usage of 'iobuf'
uint header_size, // insert 'header_size' bytes before dest data
bool add_dec_size, // true: add decompressed size
const void *src, // source buffer
uint src_size, // size of source buffer
int compr_level // valid are 1..9 / 0: use default value
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// Decode LZMA ///////////////
///////////////////////////////////////////////////////////////////////////////
enumError DecodeLZMAbin
(
u8 **dest_ptr, // result: store destination buffer addr
uint *dest_written, // store num bytes written to 'dest', never NULL
uint header_size, // insert 'header_size' bytes before dest data
const void *src, // source buffer
uint src_size // size of source buffer
);
///////////////////////////////////////////////////////////////////////////////
enumError DecodeLZMApart
(
// decompress until dest buffer full or end of source reached
// return ERR_WARNING for an incomplete decompression
void *dest_buf, // result: store read data here
uint dest_size, // size of 'dest_buf'
uint *dest_written, // store num bytes written to 'dest_ptr', never NULL
const void *src, // source buffer
uint src_size // size of source buffer
);
///////////////////////////////////////////////////////////////////////////////
enumError DecodeLZMAsize
(
u8 **dest_ptr, // result: store destination buffer addr
uint *dest_written, // store num bytes written to 'dest', never NULL
uint header_size, // insert 'header_size' bytes before dest data
const void *src, // source buffer, first 4 bytes = dest size
uint src_size // size of source buffer
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// END ///////////////
///////////////////////////////////////////////////////////////////////////////
#endif // SZS_LIB_LZMA_H 1
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