3 * \brief The public API of liblzma
5 * liblzma is a LZMA compression library with a zlib-like API.
6 * liblzma is based on LZMA SDK found from http://7-zip.org/sdk.html.
8 * \author Copyright (C) 1999-2006 Igor Pavlov
9 * \author Copyright (C) 2007 Lasse Collin
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
25 /*****************************
26 * Required standard headers *
27 *****************************/
30 * liblzma API headers need some standard types and macros. To allow
31 * including lzma.h without requiring the application to include other
32 * headers first, lzma.h includes the required standard headers unless
33 * they already seem to be included already or if LZMA_MANUAL_HEADERS
36 * Here's what types and macros are needed and from which headers:
37 * - stddef.h: size_t, NULL
38 * - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
39 * UINT32_MAX, UINT64_MAX
41 * However, inttypes.h is a little more portable than stdint.h, although
42 * inttypes.h declares some unneeded things compared to plain stdint.h.
44 * The hacks below aren't perfect, specifically they assume that inttypes.h
45 * exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
46 * and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
47 * If the application already takes care of setting up all the types and
48 * macros properly (for example by using gnulib's stdint.h or inttypes.h),
49 * we try to detect that the macros are already defined and don't include
50 * inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
51 * force this file to never include any system headers.
53 * Some could argue that liblzma API should provide all the required types,
54 * for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
55 * seen unnecessary mess, since most systems already provide all the necessary
56 * types and macros in the standard headers.
58 * Note that liblzma API still has lzma_bool, because using stdbool.h would
59 * break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
60 * necessarily the same as sizeof(bool) in C++.
63 #ifndef LZMA_MANUAL_HEADERS
65 * I suppose this works portably also in C++. Note that in C++,
66 * we need to get size_t into the global namespace.
71 * Skip inttypes.h if we already have all the required macros. If we
72 * have the macros, we assume that we have the matching typedefs too.
74 # if !defined(UINT32_C) || !defined(UINT64_C) \
75 || !defined(UINT32_MAX) || !defined(UINT64_MAX)
78 * C99 sections 7.18.2 and 7.18.4 specify that in C++
79 * implementations define the limit and constant
80 * macros only if specifically requested. Note that
81 * if you want the format macros (PRIu64 etc.) too,
82 * you need to define __STDC_FORMAT_MACROS before
83 * including lzma.h, since re-including inttypes.h
84 * with __STDC_FORMAT_MACROS defined doesn't
87 # ifndef __STDC_LIMIT_MACROS
88 # define __STDC_LIMIT_MACROS 1
90 # ifndef __STDC_CONSTANT_MACROS
91 # define __STDC_CONSTANT_MACROS 1
95 # include <inttypes.h>
98 * Some old systems have only the typedefs in inttypes.h, and
99 * lack all the macros. For those systems, we need a few more
100 * hacks. We assume that unsigned int is 32-bit and unsigned
101 * long is either 32-bit or 64-bit. If these hacks aren't
102 * enough, the application has to setup the types manually
103 * before including lzma.h.
106 # define UINT32_C(n) n # U
112 # if ULONG_MAX == 4294967295UL
113 # define UINT64_C(n) n ## ULL
115 # define UINT64_C(n) n ## UL
120 # define UINT32_MAX (UINT32_C(4294967295))
124 # define UINT64_MAX (UINT64_C(18446744073709551615))
127 #endif /* ifdef LZMA_MANUAL_HEADERS */
130 /********************
132 ********************/
135 * GNU C extensions are used conditionally in the public API. It doesn't
136 * break anything if these are sometimes enabled and sometimes not, only
137 * affects warnings and optimizations.
140 # ifndef lzma_attribute
141 # define lzma_attribute(attr) __attribute__(attr)
144 # ifndef lzma_restrict
145 # define lzma_restrict __restrict__
148 /* warn_unused_result was added in GCC 3.4. */
149 # ifndef lzma_attr_warn_unused_result
150 # if __GNUC__ == 3 && __GNUC_MINOR__ < 4
151 # define lzma_attr_warn_unused_result
156 # ifndef lzma_attribute
157 # define lzma_attribute(attr)
160 # ifndef lzma_restrict
161 # if __STDC_VERSION__ >= 199901L
162 # define lzma_restrict restrict
164 # define lzma_restrict
170 #ifndef lzma_attr_pure
171 # define lzma_attr_pure lzma_attribute((__pure__))
174 #ifndef lzma_attr_const
175 # define lzma_attr_const lzma_attribute((__const__))
178 #ifndef lzma_attr_warn_unused_result
179 # define lzma_attr_warn_unused_result \
180 lzma_attribute((__warn_unused_result__))
193 * Subheaders check that this is defined. It is to prevent including
194 * them directly from applications.
196 #define LZMA_H_INTERNAL 1
199 #include "lzma/version.h"
200 #include "lzma/base.h"
201 #include "lzma/vli.h"
202 #include "lzma/check.h"
205 #include "lzma/filter.h"
206 #include "lzma/subblock.h"
207 #include "lzma/simple.h"
208 #include "lzma/delta.h"
209 #include "lzma/lzma.h"
211 /* Container formats */
212 #include "lzma/container.h"
214 /* Advanced features */
215 #include "lzma/stream_flags.h"
216 #include "lzma/block.h"
217 #include "lzma/index.h"
218 #include "lzma/index_hash.h"
221 * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
222 * re-including the subheaders.
224 #undef LZMA_H_INTERNAL
230 #endif /* ifndef LZMA_H */