326 lines
9.6 KiB
C
326 lines
9.6 KiB
C
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/**
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* \file api/lzma.h
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* \brief The public API of liblzma data compression library
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*
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* liblzma is a public domain general-purpose data compression library with
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* a zlib-like API. The native file format is .xz, but also the old .lzma
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* format and raw (no headers) streams are supported. Multiple compression
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* algorithms (filters) are supported. Currently LZMA2 is the primary filter.
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*
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* liblzma is part of XZ Utils <http://tukaani.org/xz/>. XZ Utils includes
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* a gzip-like command line tool named xz and some other tools. XZ Utils
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* is developed and maintained by Lasse Collin.
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*
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* Major parts of liblzma are based on Igor Pavlov's public domain LZMA SDK
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* <http://7-zip.org/sdk.html>.
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*
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* The SHA-256 implementation is based on the public domain code found from
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* 7-Zip <http://7-zip.org/>, which has a modified version of the public
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* domain SHA-256 code found from Crypto++ <http://www.cryptopp.com/>.
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* The SHA-256 code in Crypto++ was written by Kevin Springle and Wei Dai.
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*/
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/*
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* Author: Lasse Collin
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*
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* This file has been put into the public domain.
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* You can do whatever you want with this file.
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*/
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#ifndef LZMA_H
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#define LZMA_H
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/*****************************
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* Required standard headers *
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*****************************/
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/*
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* liblzma API headers need some standard types and macros. To allow
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* including lzma.h without requiring the application to include other
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* headers first, lzma.h includes the required standard headers unless
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* they already seem to be included already or if LZMA_MANUAL_HEADERS
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* has been defined.
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*
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* Here's what types and macros are needed and from which headers:
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* - stddef.h: size_t, NULL
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* - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
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* UINT32_MAX, UINT64_MAX
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*
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* However, inttypes.h is a little more portable than stdint.h, although
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* inttypes.h declares some unneeded things compared to plain stdint.h.
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*
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* The hacks below aren't perfect, specifically they assume that inttypes.h
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* exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
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* and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
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* If the application already takes care of setting up all the types and
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* macros properly (for example by using gnulib's stdint.h or inttypes.h),
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* we try to detect that the macros are already defined and don't include
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* inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
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* force this file to never include any system headers.
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*
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* Some could argue that liblzma API should provide all the required types,
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* for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
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* seen as an unnecessary mess, since most systems already provide all the
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* necessary types and macros in the standard headers.
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*
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* Note that liblzma API still has lzma_bool, because using stdbool.h would
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* break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
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* necessarily the same as sizeof(bool) in C++.
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*/
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#ifndef LZMA_MANUAL_HEADERS
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/*
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* I suppose this works portably also in C++. Note that in C++,
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* we need to get size_t into the global namespace.
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*/
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# include <stddef.h>
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/*
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* Skip inttypes.h if we already have all the required macros. If we
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* have the macros, we assume that we have the matching typedefs too.
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*/
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# if !defined(UINT32_C) || !defined(UINT64_C) \
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|| !defined(UINT32_MAX) || !defined(UINT64_MAX)
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/*
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* MSVC versions older than 2013 have no C99 support, and
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* thus they cannot be used to compile liblzma. Using an
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* existing liblzma.dll with old MSVC can work though(*),
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* but we need to define the required standard integer
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* types here in a MSVC-specific way.
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*
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* (*) If you do this, the existing liblzma.dll probably uses
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* a different runtime library than your MSVC-built
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* application. Mixing runtimes is generally bad, but
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* in this case it should work as long as you avoid
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* the few rarely-needed liblzma functions that allocate
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* memory and expect the caller to free it using free().
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*/
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# if defined(_WIN32) && defined(_MSC_VER) && _MSC_VER < 1800
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typedef unsigned __int8 uint8_t;
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typedef unsigned __int32 uint32_t;
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typedef unsigned __int64 uint64_t;
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# else
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/* Use the standard inttypes.h. */
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# ifdef __cplusplus
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/*
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* C99 sections 7.18.2 and 7.18.4 specify
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* that C++ implementations define the limit
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* and constant macros only if specifically
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* requested. Note that if you want the
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* format macros (PRIu64 etc.) too, you need
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* to define __STDC_FORMAT_MACROS before
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* including lzma.h, since re-including
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* inttypes.h with __STDC_FORMAT_MACROS
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* defined doesn't necessarily work.
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*/
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# ifndef __STDC_LIMIT_MACROS
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# define __STDC_LIMIT_MACROS 1
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# endif
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# ifndef __STDC_CONSTANT_MACROS
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# define __STDC_CONSTANT_MACROS 1
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# endif
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# endif
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# include <inttypes.h>
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# endif
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/*
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* Some old systems have only the typedefs in inttypes.h, and
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* lack all the macros. For those systems, we need a few more
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* hacks. We assume that unsigned int is 32-bit and unsigned
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* long is either 32-bit or 64-bit. If these hacks aren't
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* enough, the application has to setup the types manually
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* before including lzma.h.
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*/
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# ifndef UINT32_C
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# if defined(_WIN32) && defined(_MSC_VER)
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# define UINT32_C(n) n ## UI32
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# else
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# define UINT32_C(n) n ## U
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# endif
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# endif
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# ifndef UINT64_C
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# if defined(_WIN32) && defined(_MSC_VER)
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# define UINT64_C(n) n ## UI64
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# else
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/* Get ULONG_MAX. */
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# include <limits.h>
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# if ULONG_MAX == 4294967295UL
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# define UINT64_C(n) n ## ULL
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# else
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# define UINT64_C(n) n ## UL
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# endif
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# endif
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# endif
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# ifndef UINT32_MAX
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# define UINT32_MAX (UINT32_C(4294967295))
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# endif
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# ifndef UINT64_MAX
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# define UINT64_MAX (UINT64_C(18446744073709551615))
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# endif
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# endif
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#endif /* ifdef LZMA_MANUAL_HEADERS */
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/******************
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* LZMA_API macro *
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******************/
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/*
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* Some systems require that the functions and function pointers are
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* declared specially in the headers. LZMA_API_IMPORT is for importing
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* symbols and LZMA_API_CALL is to specify the calling convention.
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*
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* By default it is assumed that the application will link dynamically
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* against liblzma. #define LZMA_API_STATIC in your application if you
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* want to link against static liblzma. If you don't care about portability
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* to operating systems like Windows, or at least don't care about linking
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* against static liblzma on them, don't worry about LZMA_API_STATIC. That
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* is, most developers will never need to use LZMA_API_STATIC.
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*
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* The GCC variants are a special case on Windows (Cygwin and MinGW).
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* We rely on GCC doing the right thing with its auto-import feature,
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* and thus don't use __declspec(dllimport). This way developers don't
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* need to worry about LZMA_API_STATIC. Also the calling convention is
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* omitted on Cygwin but not on MinGW.
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*/
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#ifndef LZMA_API_IMPORT
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# if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__)
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# define LZMA_API_IMPORT __declspec(dllimport)
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# else
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# define LZMA_API_IMPORT
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# endif
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#endif
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#ifndef LZMA_API_CALL
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# if defined(_WIN32) && !defined(__CYGWIN__)
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# define LZMA_API_CALL __cdecl
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# else
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# define LZMA_API_CALL
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# endif
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#endif
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#ifndef LZMA_API
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# define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL
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#endif
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/***********
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* nothrow *
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***********/
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/*
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* None of the functions in liblzma may throw an exception. Even
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* the functions that use callback functions won't throw exceptions,
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* because liblzma would break if a callback function threw an exception.
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*/
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#ifndef lzma_nothrow
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# if defined(__cplusplus)
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# if __cplusplus >= 201103L
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# define lzma_nothrow noexcept
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# else
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# define lzma_nothrow throw()
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# endif
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# elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
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# define lzma_nothrow __attribute__((__nothrow__))
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# else
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# define lzma_nothrow
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# endif
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#endif
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/********************
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* GNU C extensions *
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********************/
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/*
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* GNU C extensions are used conditionally in the public API. It doesn't
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* break anything if these are sometimes enabled and sometimes not, only
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* affects warnings and optimizations.
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*/
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#if __GNUC__ >= 3
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# ifndef lzma_attribute
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# define lzma_attribute(attr) __attribute__(attr)
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# endif
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/* warn_unused_result was added in GCC 3.4. */
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# ifndef lzma_attr_warn_unused_result
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# if __GNUC__ == 3 && __GNUC_MINOR__ < 4
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# define lzma_attr_warn_unused_result
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# endif
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# endif
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#else
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# ifndef lzma_attribute
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# define lzma_attribute(attr)
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# endif
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#endif
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#ifndef lzma_attr_pure
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# define lzma_attr_pure lzma_attribute((__pure__))
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#endif
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#ifndef lzma_attr_const
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# define lzma_attr_const lzma_attribute((__const__))
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#endif
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#ifndef lzma_attr_warn_unused_result
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# define lzma_attr_warn_unused_result \
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lzma_attribute((__warn_unused_result__))
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#endif
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/**************
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* Subheaders *
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**************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Subheaders check that this is defined. It is to prevent including
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* them directly from applications.
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*/
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#define LZMA_H_INTERNAL 1
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/* Basic features */
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#include "lzma/version.h"
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#include "lzma/base.h"
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#include "lzma/vli.h"
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#include "lzma/check.h"
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/* Filters */
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#include "lzma/filter.h"
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#include "lzma/bcj.h"
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#include "lzma/delta.h"
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#include "lzma/lzma12.h"
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/* Container formats */
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#include "lzma/container.h"
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/* Advanced features */
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#include "lzma/stream_flags.h"
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#include "lzma/block.h"
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#include "lzma/index.h"
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#include "lzma/index_hash.h"
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/* Hardware information */
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#include "lzma/hardware.h"
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/*
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* All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
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* re-including the subheaders.
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*/
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#undef LZMA_H_INTERNAL
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#ifdef __cplusplus
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}
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#endif
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#endif /* ifndef LZMA_H */
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