| 1 | /**
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| 2 | * \file api/lzma.h
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| 3 | * \brief The public API of liblzma data compression library
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| 4 | *
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| 5 | * liblzma is a public domain general-purpose data compression library with
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| 6 | * a zlib-like API. The native file format is .xz, but also the old .lzma
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| 7 | * format and raw (no headers) streams are supported. Multiple compression
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| 8 | * algorithms (filters) are supported. Currently LZMA2 is the primary filter.
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| 9 | *
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| 10 | * liblzma is part of XZ Utils <http://tukaani.org/xz/>. XZ Utils includes
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| 11 | * a gzip-like command line tool named xz and some other tools. XZ Utils
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| 12 | * is developed and maintained by Lasse Collin.
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| 13 | *
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| 14 | * Major parts of liblzma are based on Igor Pavlov's public domain LZMA SDK
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| 15 | * <http://7-zip.org/sdk.html>.
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| 16 | *
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| 17 | * The SHA-256 implementation is based on the public domain code found from
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| 18 | * 7-Zip <http://7-zip.org/>, which has a modified version of the public
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| 19 | * domain SHA-256 code found from Crypto++ <http://www.cryptopp.com/>.
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| 20 | * The SHA-256 code in Crypto++ was written by Kevin Springle and Wei Dai.
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| 21 | */
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| 22 |
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| 23 | /*
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| 24 | * Author: Lasse Collin
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| 25 | *
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| 26 | * This file has been put into the public domain.
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| 27 | * You can do whatever you want with this file.
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| 28 | */
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| 29 |
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| 30 | #ifndef LZMA_H
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| 31 | #define LZMA_H
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| 32 |
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| 33 | /*****************************
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| 34 | * Required standard headers *
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| 35 | *****************************/
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| 36 |
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| 37 | /*
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| 38 | * liblzma API headers need some standard types and macros. To allow
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| 39 | * including lzma.h without requiring the application to include other
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| 40 | * headers first, lzma.h includes the required standard headers unless
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| 41 | * they already seem to be included already or if LZMA_MANUAL_HEADERS
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| 42 | * has been defined.
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| 43 | *
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| 44 | * Here's what types and macros are needed and from which headers:
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| 45 | * - stddef.h: size_t, NULL
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| 46 | * - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
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| 47 | * UINT32_MAX, UINT64_MAX
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| 48 | *
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| 49 | * However, inttypes.h is a little more portable than stdint.h, although
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| 50 | * inttypes.h declares some unneeded things compared to plain stdint.h.
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| 51 | *
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| 52 | * The hacks below aren't perfect, specifically they assume that inttypes.h
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| 53 | * exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
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| 54 | * and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
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| 55 | * If the application already takes care of setting up all the types and
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| 56 | * macros properly (for example by using gnulib's stdint.h or inttypes.h),
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| 57 | * we try to detect that the macros are already defined and don't include
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| 58 | * inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
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| 59 | * force this file to never include any system headers.
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| 60 | *
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| 61 | * Some could argue that liblzma API should provide all the required types,
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| 62 | * for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
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| 63 | * seen as an unnecessary mess, since most systems already provide all the
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| 64 | * necessary types and macros in the standard headers.
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| 65 | *
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| 66 | * Note that liblzma API still has lzma_bool, because using stdbool.h would
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| 67 | * break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
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| 68 | * necessarily the same as sizeof(bool) in C++.
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| 69 | */
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| 70 |
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| 71 | #ifndef LZMA_MANUAL_HEADERS
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| 72 | /*
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| 73 | * I suppose this works portably also in C++. Note that in C++,
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| 74 | * we need to get size_t into the global namespace.
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| 75 | */
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| 76 | # include <stddef.h>
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| 77 |
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| 78 | /*
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| 79 | * Skip inttypes.h if we already have all the required macros. If we
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| 80 | * have the macros, we assume that we have the matching typedefs too.
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| 81 | */
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| 82 | # if !defined(UINT32_C) || !defined(UINT64_C) \
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| 83 | || !defined(UINT32_MAX) || !defined(UINT64_MAX)
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| 84 | /*
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| 85 | * MSVC versions older than 2013 have no C99 support, and
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| 86 | * thus they cannot be used to compile liblzma. Using an
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| 87 | * existing liblzma.dll with old MSVC can work though(*),
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| 88 | * but we need to define the required standard integer
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| 89 | * types here in a MSVC-specific way.
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| 90 | *
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| 91 | * (*) If you do this, the existing liblzma.dll probably uses
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| 92 | * a different runtime library than your MSVC-built
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| 93 | * application. Mixing runtimes is generally bad, but
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| 94 | * in this case it should work as long as you avoid
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| 95 | * the few rarely-needed liblzma functions that allocate
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| 96 | * memory and expect the caller to free it using free().
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| 97 | */
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| 98 | # if defined(_WIN32) && defined(_MSC_VER) && _MSC_VER < 1800
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| 99 | typedef unsigned __int8 uint8_t;
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| 100 | typedef unsigned __int32 uint32_t;
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| 101 | typedef unsigned __int64 uint64_t;
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| 102 | # else
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| 103 | /* Use the standard inttypes.h. */
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| 104 | # ifdef __cplusplus
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| 105 | /*
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| 106 | * C99 sections 7.18.2 and 7.18.4 specify
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| 107 | * that C++ implementations define the limit
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| 108 | * and constant macros only if specifically
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| 109 | * requested. Note that if you want the
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| 110 | * format macros (PRIu64 etc.) too, you need
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| 111 | * to define __STDC_FORMAT_MACROS before
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| 112 | * including lzma.h, since re-including
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| 113 | * inttypes.h with __STDC_FORMAT_MACROS
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| 114 | * defined doesn't necessarily work.
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| 115 | */
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| 116 | # ifndef __STDC_LIMIT_MACROS
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| 117 | # define __STDC_LIMIT_MACROS 1
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| 118 | # endif
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| 119 | # ifndef __STDC_CONSTANT_MACROS
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| 120 | # define __STDC_CONSTANT_MACROS 1
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| 121 | # endif
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| 122 | # endif
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| 123 |
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| 124 | # include <inttypes.h>
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| 125 | # endif
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| 126 |
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| 127 | /*
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| 128 | * Some old systems have only the typedefs in inttypes.h, and
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| 129 | * lack all the macros. For those systems, we need a few more
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| 130 | * hacks. We assume that unsigned int is 32-bit and unsigned
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| 131 | * long is either 32-bit or 64-bit. If these hacks aren't
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| 132 | * enough, the application has to setup the types manually
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| 133 | * before including lzma.h.
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| 134 | */
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| 135 | # ifndef UINT32_C
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| 136 | # if defined(_WIN32) && defined(_MSC_VER)
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| 137 | # define UINT32_C(n) n ## UI32
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| 138 | # else
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| 139 | # define UINT32_C(n) n ## U
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| 140 | # endif
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| 141 | # endif
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| 142 |
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| 143 | # ifndef UINT64_C
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| 144 | # if defined(_WIN32) && defined(_MSC_VER)
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| 145 | # define UINT64_C(n) n ## UI64
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| 146 | # else
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| 147 | /* Get ULONG_MAX. */
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| 148 | # include <limits.h>
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| 149 | # if ULONG_MAX == 4294967295UL
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| 150 | # define UINT64_C(n) n ## ULL
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| 151 | # else
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| 152 | # define UINT64_C(n) n ## UL
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| 153 | # endif
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| 154 | # endif
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| 155 | # endif
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| 156 |
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| 157 | # ifndef UINT32_MAX
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| 158 | # define UINT32_MAX (UINT32_C(4294967295))
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| 159 | # endif
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| 160 |
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| 161 | # ifndef UINT64_MAX
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| 162 | # define UINT64_MAX (UINT64_C(18446744073709551615))
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| 163 | # endif
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| 164 | # endif
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| 165 | #endif /* ifdef LZMA_MANUAL_HEADERS */
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| 166 |
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| 167 |
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| 168 | /******************
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| 169 | * LZMA_API macro *
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| 170 | ******************/
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| 171 |
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| 172 | /*
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| 173 | * Some systems require that the functions and function pointers are
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| 174 | * declared specially in the headers. LZMA_API_IMPORT is for importing
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| 175 | * symbols and LZMA_API_CALL is to specify the calling convention.
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| 176 | *
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| 177 | * By default it is assumed that the application will link dynamically
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| 178 | * against liblzma. #define LZMA_API_STATIC in your application if you
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| 179 | * want to link against static liblzma. If you don't care about portability
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| 180 | * to operating systems like Windows, or at least don't care about linking
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| 181 | * against static liblzma on them, don't worry about LZMA_API_STATIC. That
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| 182 | * is, most developers will never need to use LZMA_API_STATIC.
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| 183 | *
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| 184 | * The GCC variants are a special case on Windows (Cygwin and MinGW).
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| 185 | * We rely on GCC doing the right thing with its auto-import feature,
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| 186 | * and thus don't use __declspec(dllimport). This way developers don't
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| 187 | * need to worry about LZMA_API_STATIC. Also the calling convention is
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| 188 | * omitted on Cygwin but not on MinGW.
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| 189 | */
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| 190 | #ifndef LZMA_API_IMPORT
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| 191 | # if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__)
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| 192 | # define LZMA_API_IMPORT __declspec(dllimport)
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| 193 | # else
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| 194 | # define LZMA_API_IMPORT
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| 195 | # endif
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| 196 | #endif
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| 197 |
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| 198 | #ifndef LZMA_API_CALL
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| 199 | # if defined(_WIN32) && !defined(__CYGWIN__)
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| 200 | # define LZMA_API_CALL __cdecl
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| 201 | # else
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| 202 | # define LZMA_API_CALL
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| 203 | # endif
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| 204 | #endif
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| 205 |
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| 206 | #ifndef LZMA_API
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| 207 | # define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL
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| 208 | #endif
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| 209 |
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| 210 |
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| 211 | /***********
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| 212 | * nothrow *
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| 213 | ***********/
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| 214 |
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| 215 | /*
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| 216 | * None of the functions in liblzma may throw an exception. Even
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| 217 | * the functions that use callback functions won't throw exceptions,
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| 218 | * because liblzma would break if a callback function threw an exception.
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| 219 | */
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| 220 | #ifndef lzma_nothrow
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| 221 | # if defined(__cplusplus)
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| 222 | # if __cplusplus >= 201103L || (defined(_MSVC_LANG) \
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| 223 | && _MSVC_LANG >= 201103L)
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| 224 | # define lzma_nothrow noexcept
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| 225 | # else
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| 226 | # define lzma_nothrow throw()
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| 227 | # endif
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| 228 | # elif defined(__GNUC__) && (__GNUC__ > 3 \
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| 229 | || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3))
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| 230 | # define lzma_nothrow __attribute__((__nothrow__))
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| 231 | # else
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| 232 | # define lzma_nothrow
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| 233 | # endif
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| 234 | #endif
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| 235 |
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| 236 |
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| 237 | /********************
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| 238 | * GNU C extensions *
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| 239 | ********************/
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| 240 |
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| 241 | /*
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| 242 | * GNU C extensions are used conditionally in the public API. It doesn't
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| 243 | * break anything if these are sometimes enabled and sometimes not, only
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| 244 | * affects warnings and optimizations.
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| 245 | */
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| 246 | #if defined(__GNUC__) && __GNUC__ >= 3
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| 247 | # ifndef lzma_attribute
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| 248 | # define lzma_attribute(attr) __attribute__(attr)
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| 249 | # endif
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| 250 |
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| 251 | /* warn_unused_result was added in GCC 3.4. */
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| 252 | # ifndef lzma_attr_warn_unused_result
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| 253 | # if __GNUC__ == 3 && __GNUC_MINOR__ < 4
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| 254 | # define lzma_attr_warn_unused_result
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| 255 | # endif
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| 256 | # endif
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| 257 |
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| 258 | #else
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| 259 | # ifndef lzma_attribute
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| 260 | # define lzma_attribute(attr)
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| 261 | # endif
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| 262 | #endif
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| 263 |
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| 264 |
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| 265 | #ifndef lzma_attr_pure
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| 266 | # define lzma_attr_pure lzma_attribute((__pure__))
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| 267 | #endif
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| 268 |
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| 269 | #ifndef lzma_attr_const
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| 270 | # define lzma_attr_const lzma_attribute((__const__))
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| 271 | #endif
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| 272 |
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| 273 | #ifndef lzma_attr_warn_unused_result
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| 274 | # define lzma_attr_warn_unused_result \
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| 275 | lzma_attribute((__warn_unused_result__))
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| 276 | #endif
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| 277 |
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| 278 |
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| 279 | /**************
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| 280 | * Subheaders *
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| 281 | **************/
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| 282 |
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| 283 | #ifdef __cplusplus
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| 284 | extern "C" {
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| 285 | #endif
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| 286 |
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| 287 | /*
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| 288 | * Subheaders check that this is defined. It is to prevent including
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| 289 | * them directly from applications.
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| 290 | */
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| 291 | #define LZMA_H_INTERNAL 1
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| 292 |
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| 293 | /* Basic features */
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| 294 | #include "lzma/version.h"
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| 295 | #include "lzma/base.h"
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| 296 | #include "lzma/vli.h"
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| 297 | #include "lzma/check.h"
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| 298 |
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| 299 | /* Filters */
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| 300 | #include "lzma/filter.h"
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| 301 | #include "lzma/bcj.h"
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| 302 | #include "lzma/delta.h"
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| 303 | #include "lzma/lzma12.h"
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| 304 |
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| 305 | /* Container formats */
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| 306 | #include "lzma/container.h"
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| 307 |
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| 308 | /* Advanced features */
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| 309 | #include "lzma/stream_flags.h"
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| 310 | #include "lzma/block.h"
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| 311 | #include "lzma/index.h"
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| 312 | #include "lzma/index_hash.h"
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| 313 |
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| 314 | /* Hardware information */
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| 315 | #include "lzma/hardware.h"
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| 316 |
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| 317 | /*
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| 318 | * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
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| 319 | * re-including the subheaders.
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| 320 | */
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| 321 | #undef LZMA_H_INTERNAL
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| 322 |
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| 323 | #ifdef __cplusplus
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| 324 | }
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| 325 | #endif
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| 326 |
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| 327 | #endif /* ifndef LZMA_H */
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