src/liblzma/api/lzma.h - jrn/xz - Git at Google

 /**
  * \file        api/lzma.h
  * \brief       The public API of liblzma data compression library
  *
  * liblzma is a public domain general-purpose data compression library with
  * a zlib-like API. The native file format is .xz, but also the old .lzma
  * format and raw (no headers) streams are supported. Multiple compression
  * algorithms (filters) are supported. Currently LZMA2 is the primary filter.
  *
  * liblzma is part of XZ Utils <http://tukaani.org/xz/>. XZ Utils includes
  * a gzip-like command line tool named xz and some other tools. XZ Utils
  * is developed and maintained by Lasse Collin.
  *
  * Major parts of liblzma are based on Igor Pavlov's public domain LZMA SDK
  * <http://7-zip.org/sdk.html>.
  *
  * The SHA-256 implementation is based on the public domain code found from
  * 7-Zip <http://7-zip.org/>, which has a modified version of the public
  * domain SHA-256 code found from Crypto++ <http://www.cryptopp.com/>.
  * The SHA-256 code in Crypto++ was written by Kevin Springle and Wei Dai.
  */

 /*
  * Author: Lasse Collin
  *
  * This file has been put into the public domain.
  * You can do whatever you want with this file.
  */

 #ifndef LZMA_H
 #define LZMA_H

 /*****************************
  * Required standard headers *
  *****************************/

 /*
  * liblzma API headers need some standard types and macros. To allow
  * including lzma.h without requiring the application to include other
  * headers first, lzma.h includes the required standard headers unless
  * they already seem to be included already or if LZMA_MANUAL_HEADERS
  * has been defined.
  *
  * Here's what types and macros are needed and from which headers:
  *  - stddef.h: size_t, NULL
  *  - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
  *    UINT32_MAX, UINT64_MAX
  *
  * However, inttypes.h is a little more portable than stdint.h, although
  * inttypes.h declares some unneeded things compared to plain stdint.h.
  *
  * The hacks below aren't perfect, specifically they assume that inttypes.h
  * exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
  * and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
  * If the application already takes care of setting up all the types and
  * macros properly (for example by using gnulib's stdint.h or inttypes.h),
  * we try to detect that the macros are already defined and don't include
  * inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
  * force this file to never include any system headers.
  *
  * Some could argue that liblzma API should provide all the required types,
  * for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
  * seen as an unnecessary mess, since most systems already provide all the
  * necessary types and macros in the standard headers.
  *
  * Note that liblzma API still has lzma_bool, because using stdbool.h would
  * break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
  * necessarily the same as sizeof(bool) in C++.
  */

 #ifndef LZMA_MANUAL_HEADERS
 	/*
 	 * I suppose this works portably also in C++. Note that in C++,
 	 * we need to get size_t into the global namespace.
 	 */
 #	include <stddef.h>

 	/*
 	 * Skip inttypes.h if we already have all the required macros. If we
 	 * have the macros, we assume that we have the matching typedefs too.
 	 */
 #	if !defined(UINT32_C) || !defined(UINT64_C) \
 			|| !defined(UINT32_MAX) || !defined(UINT64_MAX)
 		/*
 		 * MSVC versions older than 2013 have no C99 support, and
 		 * thus they cannot be used to compile liblzma. Using an
 		 * existing liblzma.dll with old MSVC can work though(*),
 		 * but we need to define the required standard integer
 		 * types here in a MSVC-specific way.
 		 *
 		 * (*) If you do this, the existing liblzma.dll probably uses
 		 *     a different runtime library than your MSVC-built
 		 *     application. Mixing runtimes is generally bad, but
 		 *     in this case it should work as long as you avoid
 		 *     the few rarely-needed liblzma functions that allocate
 		 *     memory and expect the caller to free it using free().
 		 */
 #		if defined(_WIN32) && defined(_MSC_VER) && _MSC_VER < 1800
 			typedef unsigned __int8 uint8_t;
 			typedef unsigned __int32 uint32_t;
 			typedef unsigned __int64 uint64_t;
 #		else
 			/* Use the standard inttypes.h. */
 #			ifdef __cplusplus
 				/*
 				 * C99 sections 7.18.2 and 7.18.4 specify
 				 * that C++ implementations define the limit
 				 * and constant macros only if specifically
 				 * requested. Note that if you want the
 				 * format macros (PRIu64 etc.) too, you need
 				 * to define __STDC_FORMAT_MACROS before
 				 * including lzma.h, since re-including
 				 * inttypes.h with __STDC_FORMAT_MACROS
 				 * defined doesn't necessarily work.
 				 */
 #				ifndef __STDC_LIMIT_MACROS
 #					define __STDC_LIMIT_MACROS 1
 #				endif
 #				ifndef __STDC_CONSTANT_MACROS
 #					define __STDC_CONSTANT_MACROS 1
 #				endif
 #			endif

 #			include <inttypes.h>
 #		endif

 		/*
 		 * Some old systems have only the typedefs in inttypes.h, and
 		 * lack all the macros. For those systems, we need a few more
 		 * hacks. We assume that unsigned int is 32-bit and unsigned
 		 * long is either 32-bit or 64-bit. If these hacks aren't
 		 * enough, the application has to setup the types manually
 		 * before including lzma.h.
 		 */
 #		ifndef UINT32_C
 #			if defined(_WIN32) && defined(_MSC_VER)
 #				define UINT32_C(n) n ## UI32
 #			else
 #				define UINT32_C(n) n ## U
 #			endif
 #		endif

 #		ifndef UINT64_C
 #			if defined(_WIN32) && defined(_MSC_VER)
 #				define UINT64_C(n) n ## UI64
 #			else
 				/* Get ULONG_MAX. */
 #				include <limits.h>
 #				if ULONG_MAX == 4294967295UL
 #					define UINT64_C(n) n ## ULL
 #				else
 #					define UINT64_C(n) n ## UL
 #				endif
 #			endif
 #		endif

 #		ifndef UINT32_MAX
 #			define UINT32_MAX (UINT32_C(4294967295))
 #		endif

 #		ifndef UINT64_MAX
 #			define UINT64_MAX (UINT64_C(18446744073709551615))
 #		endif
 #	endif
 #endif /* ifdef LZMA_MANUAL_HEADERS */


 /******************
  * LZMA_API macro *
  ******************/

 /*
  * Some systems require that the functions and function pointers are
  * declared specially in the headers. LZMA_API_IMPORT is for importing
  * symbols and LZMA_API_CALL is to specify the calling convention.
  *
  * By default it is assumed that the application will link dynamically
  * against liblzma. #define LZMA_API_STATIC in your application if you
  * want to link against static liblzma. If you don't care about portability
  * to operating systems like Windows, or at least don't care about linking
  * against static liblzma on them, don't worry about LZMA_API_STATIC. That
  * is, most developers will never need to use LZMA_API_STATIC.
  *
  * The GCC variants are a special case on Windows (Cygwin and MinGW).
  * We rely on GCC doing the right thing with its auto-import feature,
  * and thus don't use __declspec(dllimport). This way developers don't
  * need to worry about LZMA_API_STATIC. Also the calling convention is
  * omitted on Cygwin but not on MinGW.
  */
 #ifndef LZMA_API_IMPORT
 #	if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__)
 #		define LZMA_API_IMPORT __declspec(dllimport)
 #	else
 #		define LZMA_API_IMPORT
 #	endif
 #endif

 #ifndef LZMA_API_CALL
 #	if defined(_WIN32) && !defined(__CYGWIN__)
 #		define LZMA_API_CALL __cdecl
 #	else
 #		define LZMA_API_CALL
 #	endif
 #endif

 #ifndef LZMA_API
 #	define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL
 #endif


 /***********
  * nothrow *
  ***********/

 /*
  * None of the functions in liblzma may throw an exception. Even
  * the functions that use callback functions won't throw exceptions,
  * because liblzma would break if a callback function threw an exception.
  */
 #ifndef lzma_nothrow
 #	if defined(__cplusplus)
 #		define lzma_nothrow throw()
 #	elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
 #		define lzma_nothrow __attribute__((__nothrow__))
 #	else
 #		define lzma_nothrow
 #	endif
 #endif


 /********************
  * GNU C extensions *
  ********************/

 /*
  * GNU C extensions are used conditionally in the public API. It doesn't
  * break anything if these are sometimes enabled and sometimes not, only
  * affects warnings and optimizations.
  */
 #if __GNUC__ >= 3
 #	ifndef lzma_attribute
 #		define lzma_attribute(attr) __attribute__(attr)
 #	endif

 	/* warn_unused_result was added in GCC 3.4. */
 #	ifndef lzma_attr_warn_unused_result
 #		if __GNUC__ == 3 && __GNUC_MINOR__ < 4
 #			define lzma_attr_warn_unused_result
 #		endif
 #	endif

 #else
 #	ifndef lzma_attribute
 #		define lzma_attribute(attr)
 #	endif
 #endif


 #ifndef lzma_attr_pure
 #	define lzma_attr_pure lzma_attribute((__pure__))
 #endif

 #ifndef lzma_attr_const
 #	define lzma_attr_const lzma_attribute((__const__))
 #endif

 #ifndef lzma_attr_warn_unused_result
 #	define lzma_attr_warn_unused_result \
 		lzma_attribute((__warn_unused_result__))
 #endif


 /**************
  * Subheaders *
  **************/

 #ifdef __cplusplus
 extern "C" {
 #endif

 /*
  * Subheaders check that this is defined. It is to prevent including
  * them directly from applications.
  */
 #define LZMA_H_INTERNAL 1

 /* Basic features */
 #include "lzma/version.h"
 #include "lzma/base.h"
 #include "lzma/vli.h"
 #include "lzma/check.h"

 /* Filters */
 #include "lzma/filter.h"
 #include "lzma/bcj.h"
 #include "lzma/delta.h"
 #include "lzma/lzma12.h"

 /* Container formats */
 #include "lzma/container.h"

 /* Advanced features */
 #include "lzma/stream_flags.h"
 #include "lzma/block.h"
 #include "lzma/index.h"
 #include "lzma/index_hash.h"

 /* Hardware information */
 #include "lzma/hardware.h"

 /*
  * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
  * re-including the subheaders.
  */
 #undef LZMA_H_INTERNAL

 #ifdef __cplusplus
 }
 #endif

 #endif /* ifndef LZMA_H */
	/**
	* \file api/lzma.h
	* \brief The public API of liblzma data compression library
	*
	* liblzma is a public domain general-purpose data compression library with
	* a zlib-like API. The native file format is .xz, but also the old .lzma
	* format and raw (no headers) streams are supported. Multiple compression
	* algorithms (filters) are supported. Currently LZMA2 is the primary filter.
	*
	* liblzma is part of XZ Utils <http://tukaani.org/xz/>. XZ Utils includes
	* a gzip-like command line tool named xz and some other tools. XZ Utils
	* is developed and maintained by Lasse Collin.
	*
	* Major parts of liblzma are based on Igor Pavlov's public domain LZMA SDK
	* <http://7-zip.org/sdk.html>.
	*
	* The SHA-256 implementation is based on the public domain code found from
	* 7-Zip <http://7-zip.org/>, which has a modified version of the public
	* domain SHA-256 code found from Crypto++ <http://www.cryptopp.com/>.
	* The SHA-256 code in Crypto++ was written by Kevin Springle and Wei Dai.
	*/

	/*
	* Author: Lasse Collin
	*
	* This file has been put into the public domain.
	* You can do whatever you want with this file.
	*/

	#ifndef LZMA_H
	#define LZMA_H

	/*****************************
	* Required standard headers *
	*****************************/

	/*
	* liblzma API headers need some standard types and macros. To allow
	* including lzma.h without requiring the application to include other
	* headers first, lzma.h includes the required standard headers unless
	* they already seem to be included already or if LZMA_MANUAL_HEADERS
	* has been defined.
	*
	* Here's what types and macros are needed and from which headers:
	* - stddef.h: size_t, NULL
	* - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
	* UINT32_MAX, UINT64_MAX
	*
	* However, inttypes.h is a little more portable than stdint.h, although
	* inttypes.h declares some unneeded things compared to plain stdint.h.
	*
	* The hacks below aren't perfect, specifically they assume that inttypes.h
	* exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
	* and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
	* If the application already takes care of setting up all the types and
	* macros properly (for example by using gnulib's stdint.h or inttypes.h),
	* we try to detect that the macros are already defined and don't include
	* inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
	* force this file to never include any system headers.
	*
	* Some could argue that liblzma API should provide all the required types,
	* for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
	* seen as an unnecessary mess, since most systems already provide all the
	* necessary types and macros in the standard headers.
	*
	* Note that liblzma API still has lzma_bool, because using stdbool.h would
	* break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
	* necessarily the same as sizeof(bool) in C++.
	*/

	#ifndef LZMA_MANUAL_HEADERS
	/*
	* I suppose this works portably also in C++. Note that in C++,
	* we need to get size_t into the global namespace.
	*/
	# include <stddef.h>

	/*
	* Skip inttypes.h if we already have all the required macros. If we
	* have the macros, we assume that we have the matching typedefs too.
	*/
	# if !defined(UINT32_C) \|\| !defined(UINT64_C) \
	\|\| !defined(UINT32_MAX) \|\| !defined(UINT64_MAX)
	/*
	* MSVC versions older than 2013 have no C99 support, and
	* thus they cannot be used to compile liblzma. Using an
	* existing liblzma.dll with old MSVC can work though(*),
	* but we need to define the required standard integer
	* types here in a MSVC-specific way.
	*
	* (*) If you do this, the existing liblzma.dll probably uses
	* a different runtime library than your MSVC-built
	* application. Mixing runtimes is generally bad, but
	* in this case it should work as long as you avoid
	* the few rarely-needed liblzma functions that allocate
	* memory and expect the caller to free it using free().
	*/
	# if defined(_WIN32) && defined(_MSC_VER) && _MSC_VER < 1800
	typedef unsigned __int8 uint8_t;
	typedef unsigned __int32 uint32_t;
	typedef unsigned __int64 uint64_t;
	# else
	/* Use the standard inttypes.h. */
	# ifdef __cplusplus
	/*
	* C99 sections 7.18.2 and 7.18.4 specify
	* that C++ implementations define the limit
	* and constant macros only if specifically
	* requested. Note that if you want the
	* format macros (PRIu64 etc.) too, you need
	* to define __STDC_FORMAT_MACROS before
	* including lzma.h, since re-including
	* inttypes.h with __STDC_FORMAT_MACROS
	* defined doesn't necessarily work.
	*/
	# ifndef __STDC_LIMIT_MACROS
	# define __STDC_LIMIT_MACROS 1
	# endif
	# ifndef __STDC_CONSTANT_MACROS
	# define __STDC_CONSTANT_MACROS 1
	# endif
	# endif

	# include <inttypes.h>
	# endif

	/*
	* Some old systems have only the typedefs in inttypes.h, and
	* lack all the macros. For those systems, we need a few more
	* hacks. We assume that unsigned int is 32-bit and unsigned
	* long is either 32-bit or 64-bit. If these hacks aren't
	* enough, the application has to setup the types manually
	* before including lzma.h.
	*/
	# ifndef UINT32_C
	# if defined(_WIN32) && defined(_MSC_VER)
	# define UINT32_C(n) n ## UI32
	# else
	# define UINT32_C(n) n ## U
	# endif
	# endif

	# ifndef UINT64_C
	# if defined(_WIN32) && defined(_MSC_VER)
	# define UINT64_C(n) n ## UI64
	# else
	/* Get ULONG_MAX. */
	# include <limits.h>
	# if ULONG_MAX == 4294967295UL
	# define UINT64_C(n) n ## ULL
	# else
	# define UINT64_C(n) n ## UL
	# endif
	# endif
	# endif

	# ifndef UINT32_MAX
	# define UINT32_MAX (UINT32_C(4294967295))
	# endif

	# ifndef UINT64_MAX
	# define UINT64_MAX (UINT64_C(18446744073709551615))
	# endif
	# endif
	#endif /* ifdef LZMA_MANUAL_HEADERS */


	/******************
	* LZMA_API macro *
	******************/

	/*
	* Some systems require that the functions and function pointers are
	* declared specially in the headers. LZMA_API_IMPORT is for importing
	* symbols and LZMA_API_CALL is to specify the calling convention.
	*
	* By default it is assumed that the application will link dynamically
	* against liblzma. #define LZMA_API_STATIC in your application if you
	* want to link against static liblzma. If you don't care about portability
	* to operating systems like Windows, or at least don't care about linking
	* against static liblzma on them, don't worry about LZMA_API_STATIC. That
	* is, most developers will never need to use LZMA_API_STATIC.
	*
	* The GCC variants are a special case on Windows (Cygwin and MinGW).
	* We rely on GCC doing the right thing with its auto-import feature,
	* and thus don't use __declspec(dllimport). This way developers don't
	* need to worry about LZMA_API_STATIC. Also the calling convention is
	* omitted on Cygwin but not on MinGW.
	*/
	#ifndef LZMA_API_IMPORT
	# if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__)
	# define LZMA_API_IMPORT __declspec(dllimport)
	# else
	# define LZMA_API_IMPORT
	# endif
	#endif

	#ifndef LZMA_API_CALL
	# if defined(_WIN32) && !defined(__CYGWIN__)
	# define LZMA_API_CALL __cdecl
	# else
	# define LZMA_API_CALL
	# endif
	#endif

	#ifndef LZMA_API
	# define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL
	#endif


	/***********
	* nothrow *
	***********/

	/*
	* None of the functions in liblzma may throw an exception. Even
	* the functions that use callback functions won't throw exceptions,
	* because liblzma would break if a callback function threw an exception.
	*/
	#ifndef lzma_nothrow
	# if defined(__cplusplus)
	# define lzma_nothrow throw()
	# elif __GNUC__ > 3 \|\| (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
	# define lzma_nothrow __attribute__((__nothrow__))
	# else
	# define lzma_nothrow
	# endif
	#endif


	/********************
	* GNU C extensions *
	********************/

	/*
	* GNU C extensions are used conditionally in the public API. It doesn't
	* break anything if these are sometimes enabled and sometimes not, only
	* affects warnings and optimizations.
	*/
	#if __GNUC__ >= 3
	# ifndef lzma_attribute
	# define lzma_attribute(attr) __attribute__(attr)
	# endif

	/* warn_unused_result was added in GCC 3.4. */
	# ifndef lzma_attr_warn_unused_result
	# if __GNUC__ == 3 && __GNUC_MINOR__ < 4
	# define lzma_attr_warn_unused_result
	# endif
	# endif

	#else
	# ifndef lzma_attribute
	# define lzma_attribute(attr)
	# endif
	#endif


	#ifndef lzma_attr_pure
	# define lzma_attr_pure lzma_attribute((__pure__))
	#endif

	#ifndef lzma_attr_const
	# define lzma_attr_const lzma_attribute((__const__))
	#endif

	#ifndef lzma_attr_warn_unused_result
	# define lzma_attr_warn_unused_result \
	lzma_attribute((__warn_unused_result__))
	#endif


	/**************
	* Subheaders *
	**************/

	#ifdef __cplusplus
	extern "C" {
	#endif

	/*
	* Subheaders check that this is defined. It is to prevent including
	* them directly from applications.
	*/
	#define LZMA_H_INTERNAL 1

	/* Basic features */
	#include "lzma/version.h"
	#include "lzma/base.h"
	#include "lzma/vli.h"
	#include "lzma/check.h"

	/* Filters */
	#include "lzma/filter.h"
	#include "lzma/bcj.h"
	#include "lzma/delta.h"
	#include "lzma/lzma12.h"

	/* Container formats */
	#include "lzma/container.h"

	/* Advanced features */
	#include "lzma/stream_flags.h"
	#include "lzma/block.h"
	#include "lzma/index.h"
	#include "lzma/index_hash.h"

	/* Hardware information */
	#include "lzma/hardware.h"

	/*
	* All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
	* re-including the subheaders.
	*/
	#undef LZMA_H_INTERNAL

	#ifdef __cplusplus
	}
	#endif

	#endif /* ifndef LZMA_H */