lz4.h
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1 /*
2  * LZ4 - Fast LZ compression algorithm
3  * Header File
4  * Copyright (C) 2011-2016, Yann Collet.
5 
6  BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
7 
8  Redistribution and use in source and binary forms, with or without
9  modification, are permitted provided that the following conditions are
10  met:
11 
12  * Redistributions of source code must retain the above copyright
13  notice, this list of conditions and the following disclaimer.
14  * Redistributions in binary form must reproduce the above
15  copyright notice, this list of conditions and the following disclaimer
16  in the documentation and/or other materials provided with the
17  distribution.
18 
19  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 
31  You can contact the author at :
32  - LZ4 homepage : http://www.lz4.org
33  - LZ4 source repository : https://github.com/lz4/lz4
34 */
35 #ifndef LZ4_H_2983827168210
36 #define LZ4_H_2983827168210
37 
38 #if defined (__cplusplus)
39 extern "C" {
40 #endif
41 
42 /* --- Dependency --- */
43 #include <stddef.h> /* size_t */
44 
45 
46 /**
47  Introduction
48 
49  LZ4 is lossless compression algorithm, providing compression speed at 400 MB/s per core,
50  scalable with multi-cores CPU. It features an extremely fast decoder, with speed in
51  multiple GB/s per core, typically reaching RAM speed limits on multi-core systems.
52 
53  The LZ4 compression library provides in-memory compression and decompression functions.
54  Compression can be done in:
55  - a single step (described as Simple Functions)
56  - a single step, reusing a context (described in Advanced Functions)
57  - unbounded multiple steps (described as Streaming compression)
58 
59  lz4.h provides block compression functions. It gives full buffer control to user.
60  Decompressing an lz4-compressed block also requires metadata (such as compressed size).
61  Each application is free to encode such metadata in whichever way it wants.
62 
63  An additional format, called LZ4 frame specification (doc/lz4_Frame_format.md),
64  take care of encoding standard metadata alongside LZ4-compressed blocks.
65  If your application requires interoperability, it's recommended to use it.
66  A library is provided to take care of it, see lz4frame.h.
67 */
68 
69 /*^***************************************************************
70 * Export parameters
71 *****************************************************************/
72 /*
73 * LZ4_DLL_EXPORT :
74 * Enable exporting of functions when building a Windows DLL
75 */
76 #if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
77 # define LZ4LIB_API __declspec(dllexport)
78 #elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
79 # define LZ4LIB_API __declspec(dllimport) /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
80 #else
81 # define LZ4LIB_API
82 #endif
83 
84 
85 /*------ Version ------*/
86 #define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
87 #define LZ4_VERSION_MINOR 7 /* for new (non-breaking) interface capabilities */
88 #define LZ4_VERSION_RELEASE 5 /* for tweaks, bug-fixes, or development */
89 
90 #define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
91 
92 #define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
93 #define LZ4_QUOTE(str) #str
94 #define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
95 #define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
96 
97 LZ4LIB_API int LZ4_versionNumber (void); /**< library version number; to be used when checking dll version */
98 LZ4LIB_API const char* LZ4_versionString (void); /**< library version string; to be used when checking dll version */
99 
100 
101 /*-************************************
102 * Tuning parameter
103 **************************************/
104 /*!
105  * LZ4_MEMORY_USAGE :
106  * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
107  * Increasing memory usage improves compression ratio
108  * Reduced memory usage can improve speed, due to cache effect
109  * Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
110  */
111 #ifndef LZ4_MEMORY_USAGE
112 # define LZ4_MEMORY_USAGE 14
113 #endif
114 
115 /*-************************************
116 * Simple Functions
117 **************************************/
118 /*! LZ4_compress_default() :
119  Compresses 'sourceSize' bytes from buffer 'source'
120  into already allocated 'dest' buffer of size 'maxDestSize'.
121  Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
122  It also runs faster, so it's a recommended setting.
123  If the function cannot compress 'source' into a more limited 'dest' budget,
124  compression stops *immediately*, and the function result is zero.
125  As a consequence, 'dest' content is not valid.
126  This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
127  sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
128  maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
129  return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
130  or 0 if compression fails */
131 LZ4LIB_API int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
132 
133 /*! LZ4_decompress_safe() :
134  compressedSize : is the precise full size of the compressed block.
135  maxDecompressedSize : is the size of destination buffer, which must be already allocated.
136  return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
137  If destination buffer is not large enough, decoding will stop and output an error code (<0).
138  If the source stream is detected malformed, the function will stop decoding and return a negative result.
139  This function is protected against buffer overflow exploits, including malicious data packets.
140  It never writes outside output buffer, nor reads outside input buffer.
141 */
142 LZ4LIB_API int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
143 
144 
145 /*-************************************
146 * Advanced Functions
147 **************************************/
148 #define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
149 #define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
150 
151 /*!
152 LZ4_compressBound() :
153  Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
154  This function is primarily useful for memory allocation purposes (destination buffer size).
155  Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
156  Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
157  inputSize : max supported value is LZ4_MAX_INPUT_SIZE
158  return : maximum output size in a "worst case" scenario
159  or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
160 */
162 
163 /*!
164 LZ4_compress_fast() :
165  Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
166  The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
167  It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
168  An acceleration value of "1" is the same as regular LZ4_compress_default()
169  Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
170 */
171 LZ4LIB_API int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
172 
173 
174 /*!
175 LZ4_compress_fast_extState() :
176  Same compression function, just using an externally allocated memory space to store compression state.
177  Use LZ4_sizeofState() to know how much memory must be allocated,
178  and allocate it on 8-bytes boundaries (using malloc() typically).
179  Then, provide it as 'void* state' to compression function.
180 */
181 LZ4LIB_API int LZ4_sizeofState(void);
182 LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
183 
184 
185 /*!
186 LZ4_compress_destSize() :
187  Reverse the logic, by compressing as much data as possible from 'source' buffer
188  into already allocated buffer 'dest' of size 'targetDestSize'.
189  This function either compresses the entire 'source' content into 'dest' if it's large enough,
190  or fill 'dest' buffer completely with as much data as possible from 'source'.
191  *sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
192  New value is necessarily <= old value.
193  return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
194  or 0 if compression fails
195 */
196 LZ4LIB_API int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
197 
198 
199 /*!
200 LZ4_decompress_fast() :
201  originalSize : is the original and therefore uncompressed size
202  return : the number of bytes read from the source buffer (in other words, the compressed size)
203  If the source stream is detected malformed, the function will stop decoding and return a negative result.
204  Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
205  note : This function fully respect memory boundaries for properly formed compressed data.
206  It is a bit faster than LZ4_decompress_safe().
207  However, it does not provide any protection against intentionally modified data stream (malicious input).
208  Use this function in trusted environment only (data to decode comes from a trusted source).
209 */
210 LZ4LIB_API int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
211 
212 /*!
213 LZ4_decompress_safe_partial() :
214  This function decompress a compressed block of size 'compressedSize' at position 'source'
215  into destination buffer 'dest' of size 'maxDecompressedSize'.
216  The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
217  reducing decompression time.
218  return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
219  Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
220  Always control how many bytes were decoded.
221  If the source stream is detected malformed, the function will stop decoding and return a negative result.
222  This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
223 */
224 LZ4LIB_API int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
225 
226 
227 /*-*********************************************
228 * Streaming Compression Functions
229 ***********************************************/
230 typedef union LZ4_stream_u LZ4_stream_t; /* incomplete type (defined later) */
231 
232 /*! LZ4_createStream() and LZ4_freeStream() :
233  * LZ4_createStream() will allocate and initialize an `LZ4_stream_t` structure.
234  * LZ4_freeStream() releases its memory.
235  */
237 LZ4LIB_API int LZ4_freeStream (LZ4_stream_t* streamPtr);
238 
239 /*! LZ4_resetStream() :
240  * An LZ4_stream_t structure can be allocated once and re-used multiple times.
241  * Use this function to init an allocated `LZ4_stream_t` structure and start a new compression.
242  */
243 LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
244 
245 /*! LZ4_loadDict() :
246  * Use this function to load a static dictionary into LZ4_stream.
247  * Any previous data will be forgotten, only 'dictionary' will remain in memory.
248  * Loading a size of 0 is allowed.
249  * Return : dictionary size, in bytes (necessarily <= 64 KB)
250  */
251 LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
252 
253 /*! LZ4_compress_fast_continue() :
254  * Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
255  * Important : Previous data blocks are assumed to still be present and unmodified !
256  * 'dst' buffer must be already allocated.
257  * If maxDstSize >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
258  * If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function returns a zero.
259  */
260 LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int maxDstSize, int acceleration);
261 
262 /*! LZ4_saveDict() :
263  * If previously compressed data block is not guaranteed to remain available at its memory location,
264  * save it into a safer place (char* safeBuffer).
265  * Note : you don't need to call LZ4_loadDict() afterwards,
266  * dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue().
267  * Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
268  */
269 LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
270 
271 
272 /*-**********************************************
273 * Streaming Decompression Functions
274 * Bufferless synchronous API
275 ************************************************/
276 typedef union LZ4_streamDecode_u LZ4_streamDecode_t; /* incomplete type (defined later) */
277 
278 /*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
279  * creation / destruction of streaming decompression tracking structure */
282 
283 /*! LZ4_setStreamDecode() :
284  * Use this function to instruct where to find the dictionary.
285  * Setting a size of 0 is allowed (same effect as reset).
286  * @return : 1 if OK, 0 if error
287  */
288 LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
289 
290 /*!
291 LZ4_decompress_*_continue() :
292  These decoding functions allow decompression of multiple blocks in "streaming" mode.
293  Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
294  In the case of a ring buffers, decoding buffer must be either :
295  - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
296  In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
297  - Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
298  maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
299  In which case, encoding and decoding buffers do not need to be synchronized,
300  and encoding ring buffer can have any size, including small ones ( < 64 KB).
301  - _At least_ 64 KB + 8 bytes + maxBlockSize.
302  In which case, encoding and decoding buffers do not need to be synchronized,
303  and encoding ring buffer can have any size, including larger than decoding buffer.
304  Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
305  and indicate where it is saved using LZ4_setStreamDecode()
306 */
307 LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
308 LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
309 
310 
311 /*! LZ4_decompress_*_usingDict() :
312  * These decoding functions work the same as
313  * a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
314  * They are stand-alone, and don't need an LZ4_streamDecode_t structure.
315  */
316 LZ4LIB_API int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
317 LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
318 
319 
320 /*^**********************************************
321  * !!!!!! STATIC LINKING ONLY !!!!!!
322  ***********************************************/
323 /*-************************************
324  * Private definitions
325  **************************************
326  * Do not use these definitions.
327  * They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
328  * Using these definitions will expose code to API and/or ABI break in future versions of the library.
329  **************************************/
330 #define LZ4_HASHLOG (LZ4_MEMORY_USAGE-2)
331 #define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
332 #define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG) /* required as macro for static allocation */
333 
334 #if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
335 #include <stdint.h>
336 
337 typedef struct {
338  uint32_t hashTable[LZ4_HASH_SIZE_U32];
339  uint32_t currentOffset;
340  uint32_t initCheck;
341  const uint8_t* dictionary;
342  uint8_t* bufferStart; /* obsolete, used for slideInputBuffer */
343  uint32_t dictSize;
345 
346 typedef struct {
347  const uint8_t* externalDict;
348  size_t extDictSize;
349  const uint8_t* prefixEnd;
350  size_t prefixSize;
352 
353 #else
354 
355 typedef struct {
356  unsigned int hashTable[LZ4_HASH_SIZE_U32];
357  unsigned int currentOffset;
358  unsigned int initCheck;
359  const unsigned char* dictionary;
360  unsigned char* bufferStart; /* obsolete, used for slideInputBuffer */
361  unsigned int dictSize;
363 
364 typedef struct {
365  const unsigned char* externalDict;
366  size_t extDictSize;
367  const unsigned char* prefixEnd;
368  size_t prefixSize;
370 
371 #endif
372 
373 /*!
374  * LZ4_stream_t :
375  * information structure to track an LZ4 stream.
376  * init this structure before first use.
377  * note : only use in association with static linking !
378  * this definition is not API/ABI safe,
379  * and may change in a future version !
380  */
381 #define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
382 #define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
384  unsigned long long table[LZ4_STREAMSIZE_U64];
386 } ; /* previously typedef'd to LZ4_stream_t */
387 
388 
389 /*!
390  * LZ4_streamDecode_t :
391  * information structure to track an LZ4 stream during decompression.
392  * init this structure using LZ4_setStreamDecode (or memset()) before first use
393  * note : only use in association with static linking !
394  * this definition is not API/ABI safe,
395  * and may change in a future version !
396  */
397 #define LZ4_STREAMDECODESIZE_U64 4
398 #define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
400  unsigned long long table[LZ4_STREAMDECODESIZE_U64];
402 } ; /* previously typedef'd to LZ4_streamDecode_t */
403 
404 
405 /*-************************************
406 * Obsolete Functions
407 **************************************/
408 
409 /*! Deprecation warnings
410  Should deprecation warnings be a problem,
411  it is generally possible to disable them,
412  typically with -Wno-deprecated-declarations for gcc
413  or _CRT_SECURE_NO_WARNINGS in Visual.
414  Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS */
415 #ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
416 # define LZ4_DEPRECATED(message) /* disable deprecation warnings */
417 #else
418 # define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
419 # if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
420 # define LZ4_DEPRECATED(message) [[deprecated(message)]]
421 # elif (LZ4_GCC_VERSION >= 405) || defined(__clang__)
422 # define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
423 # elif (LZ4_GCC_VERSION >= 301)
424 # define LZ4_DEPRECATED(message) __attribute__((deprecated))
425 # elif defined(_MSC_VER)
426 # define LZ4_DEPRECATED(message) __declspec(deprecated(message))
427 # else
428 # pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
429 # define LZ4_DEPRECATED(message)
430 # endif
431 #endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
432 
433 /* Obsolete compression functions */
434 LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress (const char* source, char* dest, int sourceSize);
435 LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
436 LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
437 LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
438 LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
439 LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
440 
441 /* Obsolete decompression functions */
442 /* These function names are completely deprecated and must no longer be used.
443  They are only provided in lz4.c for compatibility with older programs.
444  - LZ4_uncompress is the same as LZ4_decompress_fast
445  - LZ4_uncompress_unknownOutputSize is the same as LZ4_decompress_safe
446  These function prototypes are now disabled; uncomment them only if you really need them.
447  It is highly recommended to stop using these prototypes and migrate to maintained ones */
448 /* int LZ4_uncompress (const char* source, char* dest, int outputSize); */
449 /* int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize); */
450 
451 /* Obsolete streaming functions; use new streaming interface whenever possible */
452 LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
453 LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
454 LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
455 LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
456 
457 /* Obsolete streaming decoding functions */
460 
461 
462 #if defined (__cplusplus)
463 }
464 #endif
465 
466 #endif /* LZ4_H_2983827168210 */
char int int maxOutputSize
Definition: lz4.h:435
LZ4_streamDecode_t_internal internal_donotuse
Definition: lz4.h:401
unsigned int initCheck
Definition: lz4.h:358
#define LZ4LIB_API
Definition: lz4.h:81
#define LZ4_HASH_SIZE_U32
Definition: lz4.h:332
unsigned int currentOffset
Definition: lz4.h:357
LZ4LIB_API int LZ4_sizeofState(void)
Definition: lz4.cxx:396
LZ4LIB_API void LZ4_resetStream(LZ4_stream_t *streamPtr)
Definition: lz4.cxx:923
#define LZ4_STREAMSIZE_U64
Definition: lz4.h:381
LZ4LIB_API int LZ4_decompress_safe_continue(LZ4_streamDecode_t *LZ4_streamDecode, const char *source, char *dest, int compressedSize, int maxDecompressedSize)
Definition: lz4.cxx:1310
unsigned char * bufferStart
Definition: lz4.h:360
int LZ4_resetStreamState(void *state, char *inputBuffer)
Definition: lz4.cxx:1430
#define LZ4_STREAMDECODESIZE_U64
Definition: lz4.h:397
int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest, int compressedSize, int maxOutputSize)
Definition: lz4.cxx:1453
char * dst
Definition: lz4.h:458
const unsigned char * prefixEnd
Definition: lz4.h:367
void * LZ4_create(char *inputBuffer)
Definition: lz4.cxx:1437
int LZ4_compress(const char *source, char *dest, int inputSize)
Definition: lz4.cxx:1404
char int int maxDstSize
Definition: lz4.h:458
LZ4LIB_API int LZ4_decompress_safe_partial(const char *source, char *dest, int compressedSize, int targetOutputSize, int maxDecompressedSize)
Definition: lz4.cxx:1256
unsigned long long table[LZ4_STREAMDECODESIZE_U64]
Definition: lz4.h:400
const unsigned char * externalDict
Definition: lz4.h:365
char int compressedSize
Definition: lz4.h:458
int LZ4_compress_limitedOutput(const char *source, char *dest, int inputSize, int maxOutputSize)
Definition: lz4.cxx:1403
char * inputBuffer
Definition: lz4.h:454
LZ4LIB_API int LZ4_decompress_fast_continue(LZ4_streamDecode_t *LZ4_streamDecode, const char *source, char *dest, int originalSize)
Definition: lz4.cxx:1336
char int originalSize
Definition: lz4.h:459
int LZ4_compress_continue(LZ4_stream_t *LZ4_stream, const char *source, char *dest, int inputSize)
Definition: lz4.cxx:1408
LZ4LIB_API int LZ4_compress_fast_extState(void *state, const char *source, char *dest, int inputSize, int maxDestSize, int acceleration)
Definition: lz4.cxx:659
int LZ4_sizeofStreamState()
Definition: lz4.cxx:1422
#define LZ4_DEPRECATED(message)
Definition: lz4.h:429
unsigned int dictSize
Definition: lz4.h:361
char int sourceSize
Definition: lz4.h:434
LZ4LIB_API int LZ4_freeStream(LZ4_stream_t *streamPtr)
Definition: lz4.cxx:928
LZ4LIB_API LZ4_stream_t * LZ4_createStream(void)
Definition: lz4.cxx:915
LZ4LIB_API const char * LZ4_versionString(void)
Definition: lz4.cxx:394
LZ4LIB_API int LZ4_compress_default(const char *source, char *dest, int sourceSize, int maxDestSize)
Definition: lz4.cxx:697
LZ4_stream_t_internal internal_donotuse
Definition: lz4.h:385
LZ4LIB_API int LZ4_compress_fast_continue(LZ4_stream_t *streamPtr, const char *src, char *dst, int srcSize, int maxDstSize, int acceleration)
Definition: lz4.cxx:987
LZ4LIB_API int LZ4_saveDict(LZ4_stream_t *streamPtr, char *safeBuffer, int dictSize)
Definition: lz4.cxx:1062
const char * source
Definition: lz4.h:436
LZ4LIB_API int LZ4_decompress_fast_usingDict(const char *source, char *dest, int originalSize, const char *dictStart, int dictSize)
Definition: lz4.cxx:1387
LZ4LIB_API int LZ4_versionNumber(void)
Definition: lz4.cxx:393
LZ4LIB_API int LZ4_compress_fast(const char *source, char *dest, int sourceSize, int maxDestSize, int acceleration)
Definition: lz4.cxx:679
int LZ4_compress_withState(void *state, const char *src, char *dst, int srcSize)
Definition: lz4.cxx:1406
LZ4LIB_API int LZ4_compress_destSize(const char *source, char *dest, int *sourceSizePtr, int targetDestSize)
Definition: lz4.cxx:892
const char char int inputSize
Definition: lz4.h:436
int LZ4_decompress_fast_withPrefix64k(const char *source, char *dest, int originalSize)
Definition: lz4.cxx:1458
LZ4LIB_API int LZ4_decompress_safe_usingDict(const char *source, char *dest, int compressedSize, int maxDecompressedSize, const char *dictStart, int dictSize)
Definition: lz4.cxx:1382
LZ4LIB_API LZ4_streamDecode_t * LZ4_createStreamDecode(void)
Definition: lz4.cxx:1274
int LZ4_compress_limitedOutput_continue(LZ4_stream_t *LZ4_stream, const char *src, char *dst, int srcSize, int maxDstSize)
Definition: lz4.cxx:1407
LZ4LIB_API int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
Definition: lz4.cxx:1261
LZ4LIB_API int LZ4_loadDict(LZ4_stream_t *streamPtr, const char *dictionary, int dictSize)
Definition: lz4.cxx:936
char * LZ4_slideInputBuffer(void *LZ4_Data)
Definition: lz4.cxx:1444
LZ4LIB_API int LZ4_decompress_safe(const char *source, char *dest, int compressedSize, int maxDecompressedSize)
Definition: lz4.cxx:1251
const unsigned char * dictionary
Definition: lz4.h:359
LZ4LIB_API int LZ4_setStreamDecode(LZ4_streamDecode_t *LZ4_streamDecode, const char *dictionary, int dictSize)
Definition: lz4.cxx:1293
int LZ4_compress_limitedOutput_withState(void *state, const char *src, char *dst, int srcSize, int dstSize)
Definition: lz4.cxx:1405
LZ4LIB_API int LZ4_freeStreamDecode(LZ4_streamDecode_t *LZ4_stream)
Definition: lz4.cxx:1280
char * dest
Definition: lz4.h:434
LZ4LIB_API int LZ4_compressBound(int inputSize)
Definition: lz4.cxx:395