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