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 has no C99 support, and thus it cannot be used to 86 * compile liblzma. The liblzma API has to still be usable 87 * from MSVC, so we need to define the required standard 88 * integer types here. 89 */ 90 # if defined(_WIN32) && defined(_MSC_VER) 91 typedef unsigned __int8 uint8_t; 92 typedef unsigned __int32 uint32_t; 93 typedef unsigned __int64 uint64_t; 94 # else 95 /* Use the standard inttypes.h. */ 96 # ifdef __cplusplus 97 /* 98 * C99 sections 7.18.2 and 7.18.4 specify 99 * that C++ implementations define the limit 100 * and constant macros only if specifically 101 * requested. Note that if you want the 102 * format macros (PRIu64 etc.) too, you need 103 * to define __STDC_FORMAT_MACROS before 104 * including lzma.h, since re-including 105 * inttypes.h with __STDC_FORMAT_MACROS 106 * defined doesn't necessarily work. 107 */ 108 # ifndef __STDC_LIMIT_MACROS 109 # define __STDC_LIMIT_MACROS 1 110 # endif 111 # ifndef __STDC_CONSTANT_MACROS 112 # define __STDC_CONSTANT_MACROS 1 113 # endif 114 # endif 115 116 # include <inttypes.h> 117 # endif 118 119 /* 120 * Some old systems have only the typedefs in inttypes.h, and 121 * lack all the macros. For those systems, we need a few more 122 * hacks. We assume that unsigned int is 32-bit and unsigned 123 * long is either 32-bit or 64-bit. If these hacks aren't 124 * enough, the application has to setup the types manually 125 * before including lzma.h. 126 */ 127 # ifndef UINT32_C 128 # if defined(_WIN32) && defined(_MSC_VER) 129 # define UINT32_C(n) n ## UI32 130 # else 131 # define UINT32_C(n) n ## U 132 # endif 133 # endif 134 135 # ifndef UINT64_C 136 # if defined(_WIN32) && defined(_MSC_VER) 137 # define UINT64_C(n) n ## UI64 138 # else 139 /* Get ULONG_MAX. */ 140 # include <limits.h> 141 # if ULONG_MAX == 4294967295UL 142 # define UINT64_C(n) n ## ULL 143 # else 144 # define UINT64_C(n) n ## UL 145 # endif 146 # endif 147 # endif 148 149 # ifndef UINT32_MAX 150 # define UINT32_MAX (UINT32_C(4294967295)) 151 # endif 152 153 # ifndef UINT64_MAX 154 # define UINT64_MAX (UINT64_C(18446744073709551615)) 155 # endif 156 # endif 157 #endif /* ifdef LZMA_MANUAL_HEADERS */ 158 159 160 /****************** 161 * LZMA_API macro * 162 ******************/ 163 164 /* 165 * Some systems require that the functions and function pointers are 166 * declared specially in the headers. LZMA_API_IMPORT is for importing 167 * symbols and LZMA_API_CALL is to specify the calling convention. 168 * 169 * By default it is assumed that the application will link dynamically 170 * against liblzma. #define LZMA_API_STATIC in your application if you 171 * want to link against static liblzma. If you don't care about portability 172 * to operating systems like Windows, or at least don't care about linking 173 * against static liblzma on them, don't worry about LZMA_API_STATIC. That 174 * is, most developers will never need to use LZMA_API_STATIC. 175 * 176 * The GCC variants are a special case on Windows (Cygwin and MinGW). 177 * We rely on GCC doing the right thing with its auto-import feature, 178 * and thus don't use __declspec(dllimport). This way developers don't 179 * need to worry about LZMA_API_STATIC. Also the calling convention is 180 * omitted on Cygwin but not on MinGW. 181 */ 182 #ifndef LZMA_API_IMPORT 183 # if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__) 184 # define LZMA_API_IMPORT __declspec(dllimport) 185 # else 186 # define LZMA_API_IMPORT 187 # endif 188 #endif 189 190 #ifndef LZMA_API_CALL 191 # if defined(_WIN32) && !defined(__CYGWIN__) 192 # define LZMA_API_CALL __cdecl 193 # else 194 # define LZMA_API_CALL 195 # endif 196 #endif 197 198 #ifndef LZMA_API 199 # define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL 200 #endif 201 202 203 /*********** 204 * nothrow * 205 ***********/ 206 207 /* 208 * None of the functions in liblzma may throw an exception. Even 209 * the functions that use callback functions won't throw exceptions, 210 * because liblzma would break if a callback function threw an exception. 211 */ 212 #ifndef lzma_nothrow 213 # if defined(__cplusplus) 214 # define lzma_nothrow throw() 215 # elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) 216 # define lzma_nothrow __attribute__((__nothrow__)) 217 # else 218 # define lzma_nothrow 219 # endif 220 #endif 221 222 223 /******************** 224 * GNU C extensions * 225 ********************/ 226 227 /* 228 * GNU C extensions are used conditionally in the public API. It doesn't 229 * break anything if these are sometimes enabled and sometimes not, only 230 * affects warnings and optimizations. 231 */ 232 #if __GNUC__ >= 3 233 # ifndef lzma_attribute 234 # define lzma_attribute(attr) __attribute__(attr) 235 # endif 236 237 /* warn_unused_result was added in GCC 3.4. */ 238 # ifndef lzma_attr_warn_unused_result 239 # if __GNUC__ == 3 && __GNUC_MINOR__ < 4 240 # define lzma_attr_warn_unused_result 241 # endif 242 # endif 243 244 #else 245 # ifndef lzma_attribute 246 # define lzma_attribute(attr) 247 # endif 248 #endif 249 250 251 #ifndef lzma_attr_pure 252 # define lzma_attr_pure lzma_attribute((__pure__)) 253 #endif 254 255 #ifndef lzma_attr_const 256 # define lzma_attr_const lzma_attribute((__const__)) 257 #endif 258 259 #ifndef lzma_attr_warn_unused_result 260 # define lzma_attr_warn_unused_result \ 261 lzma_attribute((__warn_unused_result__)) 262 #endif 263 264 265 /************** 266 * Subheaders * 267 **************/ 268 269 #ifdef __cplusplus 270 extern "C" { 271 #endif 272 273 /* 274 * Subheaders check that this is defined. It is to prevent including 275 * them directly from applications. 276 */ 277 #define LZMA_H_INTERNAL 1 278 279 /* Basic features */ 280 #include "lzma/version.h" 281 #include "lzma/base.h" 282 #include "lzma/vli.h" 283 #include "lzma/check.h" 284 285 /* Filters */ 286 #include "lzma/filter.h" 287 #include "lzma/bcj.h" 288 #include "lzma/delta.h" 289 #include "lzma/lzma.h" 290 291 /* Container formats */ 292 #include "lzma/container.h" 293 294 /* Advanced features */ 295 #include "lzma/stream_flags.h" 296 #include "lzma/block.h" 297 #include "lzma/index.h" 298 #include "lzma/index_hash.h" 299 300 /* Hardware information */ 301 #include "lzma/hardware.h" 302 303 /* 304 * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications 305 * re-including the subheaders. 306 */ 307 #undef LZMA_H_INTERNAL 308 309 #ifdef __cplusplus 310 } 311 #endif 312 313 #endif /* ifndef LZMA_H */ 314