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/**
* \file lzma/init.h
* \brief Initializations
*
* \author Copyright (C) 1999-2006 Igor Pavlov
* \author Copyright (C) 2007 Lasse Collin
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*/
#ifndef LZMA_H_INTERNAL
# error Never include this file directly. Use <lzma.h> instead.
#endif
/**
* \brief Initialize all internal static variables
*
* Depending on the build options, liblzma may have some internal static
* variables, that must be initialized before using any other part of
* the library (*). It is recommended to do these initializations in the very
* beginning of the application by calling appropriate initialization function.
*
* (*) There are some exceptions to this rule. FIXME
*
* The initialization functions are not necessarily thread-safe, thus the
* required initializations must be done before creating any threads. (The
* rest of the functions of liblzma are thread-safe.) Calling the
* initialization functions multiple times does no harm, although it
* still shouldn't be done when there are multiple threads running.
*
* lzma_init() initializes all internal static variables by calling
* lzma_init_encoder() and lzma_init_decoder().
*
* If you need only encoder, decoder, or neither-encoder-nor-decoder
* functions, you may use other initialization functions, which initialize
* only a subset of liblzma's internal static variables. Using those
* functions have the following advantages:
* - When linking statically against liblzma, fewer useless functions will
* get linked into the binary. E.g. if you need only the decoder functions,
* using lzma_init_decoder() avoids linking bunch of encoder related code.
* - There is less things to initialize, making the initialization
* process slightly faster.
*/
extern void lzma_init(void);
/**
* \brief Initialize internal static variables needed by encoders
*
* If you need only the encoder functions, you may use this function to
* initialize only the things required by encoders.
*
* This function also calls lzma_init_check().
*/
extern void lzma_init_encoder(void);
/**
* \brief Initialize internal static variables needed by decoders
*
* If you need only the decoder functions, you may use this function to
* initialize only the things required by decoders.
*
* This function also calls lzma_init_check().
*/
extern void lzma_init_decoder(void);
/**
* \brief Initialize internal static variables needed by integrity checks
*
* Currently this initializes CRC32 and CRC64 lookup tables if precalculated
* tables haven't been built into the library. This function can be useful
* if the only thing you need from liblzma is the integrity check functions.
*/
extern void lzma_init_check(void);
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