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lz4.h
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1 /*
2  * LZ4 - Fast LZ compression algorithm
3  * Header File
4  * Copyright (C) 2011-2017, 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 #if defined (__cplusplus)
36 extern "C" {
37 #endif
38 
39 #ifndef LZ4_H_2983827168210
40 #define LZ4_H_2983827168210
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 * LZ4LIB_API :
76 * Control library symbols visibility.
77 */
78 #if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
79 # define LZ4LIB_API __declspec(dllexport)
80 #elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
81 # 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.*/
82 #elif defined(__GNUC__) && (__GNUC__ >= 4)
83 # define LZ4LIB_API __attribute__ ((__visibility__ ("default")))
84 #else
85 # define LZ4LIB_API
86 #endif
87 
88 
89 /*------ Version ------*/
90 #define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
91 #define LZ4_VERSION_MINOR 8 /* for new (non-breaking) interface capabilities */
92 #define LZ4_VERSION_RELEASE 0 /* for tweaks, bug-fixes, or development */
93 
94 #define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
95 
96 #define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
97 #define LZ4_QUOTE(str) #str
98 #define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
99 #define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
100 
101 LZ4LIB_API int LZ4_versionNumber (void); /**< library version number; to be used when checking dll version */
102 LZ4LIB_API const char* LZ4_versionString (void); /**< library version string; to be used when checking dll version */
103 
104 
105 /*-************************************
106 * Tuning parameter
107 **************************************/
108 /*!
109  * LZ4_MEMORY_USAGE :
110  * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
111  * Increasing memory usage improves compression ratio
112  * Reduced memory usage can improve speed, due to cache effect
113  * Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
114  */
115 #ifndef LZ4_MEMORY_USAGE
116 # define LZ4_MEMORY_USAGE 14
117 #endif
118 
119 /*-************************************
120 * Simple Functions
121 **************************************/
122 /*! LZ4_compress_default() :
123  Compresses 'sourceSize' bytes from buffer 'source'
124  into already allocated 'dest' buffer of size 'maxDestSize'.
125  Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
126  It also runs faster, so it's a recommended setting.
127  If the function cannot compress 'source' into a more limited 'dest' budget,
128  compression stops *immediately*, and the function result is zero.
129  As a consequence, 'dest' content is not valid.
130  This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
131  sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
132  maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
133  return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
134  or 0 if compression fails */
135 LZ4LIB_API int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
136 
137 /*! LZ4_decompress_safe() :
138  compressedSize : is the precise full size of the compressed block.
139  maxDecompressedSize : is the size of destination buffer, which must be already allocated.
140  return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
141  If destination buffer is not large enough, decoding will stop and output an error code (<0).
142  If the source stream is detected malformed, the function will stop decoding and return a negative result.
143  This function is protected against buffer overflow exploits, including malicious data packets.
144  It never writes outside output buffer, nor reads outside input buffer.
145 */
146 LZ4LIB_API int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
147 
148 
149 /*-************************************
150 * Advanced Functions
151 **************************************/
152 #define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
153 #define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
154 
155 /*!
156 LZ4_compressBound() :
157  Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
158  This function is primarily useful for memory allocation purposes (destination buffer size).
159  Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
160  Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
161  inputSize : max supported value is LZ4_MAX_INPUT_SIZE
162  return : maximum output size in a "worst case" scenario
163  or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
164 */
166 
167 /*!
168 LZ4_compress_fast() :
169  Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
170  The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
171  It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
172  An acceleration value of "1" is the same as regular LZ4_compress_default()
173  Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
174 */
175 LZ4LIB_API int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
176 
177 
178 /*!
179 LZ4_compress_fast_extState() :
180  Same compression function, just using an externally allocated memory space to store compression state.
181  Use LZ4_sizeofState() to know how much memory must be allocated,
182  and allocate it on 8-bytes boundaries (using malloc() typically).
183  Then, provide it as 'void* state' to compression function.
184 */
185 LZ4LIB_API int LZ4_sizeofState(void);
186 LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
187 
188 
189 /*!
190 LZ4_compress_destSize() :
191  Reverse the logic, by compressing as much data as possible from 'source' buffer
192  into already allocated buffer 'dest' of size 'targetDestSize'.
193  This function either compresses the entire 'source' content into 'dest' if it's large enough,
194  or fill 'dest' buffer completely with as much data as possible from 'source'.
195  *sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
196  New value is necessarily <= old value.
197  return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
198  or 0 if compression fails
199 */
200 LZ4LIB_API int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
201 
202 
203 /*!
204 LZ4_decompress_fast() :
205  originalSize : is the original and therefore uncompressed size
206  return : the number of bytes read from the source buffer (in other words, the compressed size)
207  If the source stream is detected malformed, the function will stop decoding and return a negative result.
208  Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
209  note : This function fully respect memory boundaries for properly formed compressed data.
210  It is a bit faster than LZ4_decompress_safe().
211  However, it does not provide any protection against intentionally modified data stream (malicious input).
212  Use this function in trusted environment only (data to decode comes from a trusted source).
213 */
214 LZ4LIB_API int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
215 
216 /*!
217 LZ4_decompress_safe_partial() :
218  This function decompress a compressed block of size 'compressedSize' at position 'source'
219  into destination buffer 'dest' of size 'maxDecompressedSize'.
220  The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
221  reducing decompression time.
222  return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
223  Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
224  Always control how many bytes were decoded.
225  If the source stream is detected malformed, the function will stop decoding and return a negative result.
226  This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
227 */
228 LZ4LIB_API int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
229 
230 
231 /*-*********************************************
232 * Streaming Compression Functions
233 ***********************************************/
234 typedef union LZ4_stream_u LZ4_stream_t; /* incomplete type (defined later) */
235 
236 /*! LZ4_createStream() and LZ4_freeStream() :
237  * LZ4_createStream() will allocate and initialize an `LZ4_stream_t` structure.
238  * LZ4_freeStream() releases its memory.
239  */
241 LZ4LIB_API int LZ4_freeStream (LZ4_stream_t* streamPtr);
242 
243 /*! LZ4_resetStream() :
244  * An LZ4_stream_t structure can be allocated once and re-used multiple times.
245  * Use this function to init an allocated `LZ4_stream_t` structure and start a new compression.
246  */
247 LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
248 
249 /*! LZ4_loadDict() :
250  * Use this function to load a static dictionary into LZ4_stream.
251  * Any previous data will be forgotten, only 'dictionary' will remain in memory.
252  * Loading a size of 0 is allowed.
253  * Return : dictionary size, in bytes (necessarily <= 64 KB)
254  */
255 LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
256 
257 /*! LZ4_compress_fast_continue() :
258  * Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
259  * Important : Previous data blocks are assumed to remain present and unmodified !
260  * 'dst' buffer must be already allocated.
261  * If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
262  * If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function @return==0.
263  * After an error, the stream status is invalid, it can only be reset or freed.
264  */
265 LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
266 
267 /*! LZ4_saveDict() :
268  * If previously compressed data block is not guaranteed to remain available at its current memory location,
269  * save it into a safer place (char* safeBuffer).
270  * Note : it's not necessary to call LZ4_loadDict() after LZ4_saveDict(), dictionary is immediately usable.
271  * @return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
272  */
273 LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
274 
275 
276 /*-**********************************************
277 * Streaming Decompression Functions
278 * Bufferless synchronous API
279 ************************************************/
280 typedef union LZ4_streamDecode_u LZ4_streamDecode_t; /* incomplete type (defined later) */
281 
282 /*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
283  * creation / destruction of streaming decompression tracking structure */
286 
287 /*! LZ4_setStreamDecode() :
288  * Use this function to instruct where to find the dictionary.
289  * Setting a size of 0 is allowed (same effect as reset).
290  * @return : 1 if OK, 0 if error
291  */
292 LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
293 
294 /*! LZ4_decompress_*_continue() :
295  * These decoding functions allow decompression of multiple blocks in "streaming" mode.
296  * Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
297  * In the case of a ring buffers, decoding buffer must be either :
298  * - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
299  * In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
300  * - Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
301  * maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
302  * In which case, encoding and decoding buffers do not need to be synchronized,
303  * and encoding ring buffer can have any size, including small ones ( < 64 KB).
304  * - _At least_ 64 KB + 8 bytes + maxBlockSize.
305  * In which case, encoding and decoding buffers do not need to be synchronized,
306  * and encoding ring buffer can have any size, including larger than decoding buffer.
307  * Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
308  * and indicate where it is saved using LZ4_setStreamDecode()
309 */
310 LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
311 LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
312 
313 
314 /*! LZ4_decompress_*_usingDict() :
315  * These decoding functions work the same as
316  * a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
317  * They are stand-alone, and don't need an LZ4_streamDecode_t structure.
318  */
319 LZ4LIB_API int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
320 LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
321 
322 
323 /*^**********************************************
324  * !!!!!! STATIC LINKING ONLY !!!!!!
325  ***********************************************/
326 /*-************************************
327  * Private definitions
328  **************************************
329  * Do not use these definitions.
330  * They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
331  * Using these definitions will expose code to API and/or ABI break in future versions of the library.
332  **************************************/
333 #define LZ4_HASHLOG (LZ4_MEMORY_USAGE-2)
334 #define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
335 #define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG) /* required as macro for static allocation */
336 
337 #if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
338 #include <stdint.h>
339 
340 typedef struct {
341  uint32_t hashTable[LZ4_HASH_SIZE_U32];
342  uint32_t currentOffset;
343  uint32_t initCheck;
344  const uint8_t* dictionary;
345  uint8_t* bufferStart; /* obsolete, used for slideInputBuffer */
346  uint32_t dictSize;
348 
349 typedef struct {
350  const uint8_t* externalDict;
351  size_t extDictSize;
352  const uint8_t* prefixEnd;
353  size_t prefixSize;
355 
356 #else
357 
358 typedef struct {
359  unsigned int hashTable[LZ4_HASH_SIZE_U32];
360  unsigned int currentOffset;
361  unsigned int initCheck;
362  const unsigned char* dictionary;
363  unsigned char* bufferStart; /* obsolete, used for slideInputBuffer */
364  unsigned int dictSize;
366 
367 typedef struct {
368  const unsigned char* externalDict;
369  size_t extDictSize;
370  const unsigned char* prefixEnd;
371  size_t prefixSize;
373 
374 #endif
375 
376 /*!
377  * LZ4_stream_t :
378  * information structure to track an LZ4 stream.
379  * init this structure before first use.
380  * note : only use in association with static linking !
381  * this definition is not API/ABI safe,
382  * it may change in a future version !
383  */
384 #define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
385 #define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
387  unsigned long long table[LZ4_STREAMSIZE_U64];
389 } ; /* previously typedef'd to LZ4_stream_t */
390 
391 
392 /*!
393  * LZ4_streamDecode_t :
394  * information structure to track an LZ4 stream during decompression.
395  * init this structure using LZ4_setStreamDecode (or memset()) before first use
396  * note : only use in association with static linking !
397  * this definition is not API/ABI safe,
398  * and may change in a future version !
399  */
400 #define LZ4_STREAMDECODESIZE_U64 4
401 #define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
403  unsigned long long table[LZ4_STREAMDECODESIZE_U64];
405 } ; /* previously typedef'd to LZ4_streamDecode_t */
406 
407 
408 /*-************************************
409 * Obsolete Functions
410 **************************************/
411 
412 /*! Deprecation warnings
413  Should deprecation warnings be a problem,
414  it is generally possible to disable them,
415  typically with -Wno-deprecated-declarations for gcc
416  or _CRT_SECURE_NO_WARNINGS in Visual.
417  Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS */
418 #ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
419 # define LZ4_DEPRECATED(message) /* disable deprecation warnings */
420 #else
421 # define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
422 # if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
423 # define LZ4_DEPRECATED(message) [[deprecated(message)]]
424 # elif (LZ4_GCC_VERSION >= 405) || defined(__clang__)
425 # define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
426 # elif (LZ4_GCC_VERSION >= 301)
427 # define LZ4_DEPRECATED(message) __attribute__((deprecated))
428 # elif defined(_MSC_VER)
429 # define LZ4_DEPRECATED(message) __declspec(deprecated(message))
430 # else
431 # pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
432 # define LZ4_DEPRECATED(message)
433 # endif
434 #endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
435 
436 /* Obsolete compression functions */
437 LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress (const char* source, char* dest, int sourceSize);
438 LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
439 LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
440 LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
441 LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
442 LZ4LIB_API 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);
443 
444 /* Obsolete decompression functions */
445 LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast() instead") int LZ4_uncompress (const char* source, char* dest, int outputSize);
446 LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe() instead") int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
447 
448 /* Obsolete streaming functions; use new streaming interface whenever possible */
449 LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
451 LZ4LIB_API LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
452 LZ4LIB_API LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
453 
454 /* Obsolete streaming decoding functions */
457 
458 #endif /* LZ4_H_2983827168210 */
459 
460 
461 #if defined (__cplusplus)
462 }
463 #endif
void * LZ4_create(char *inputBuffer)
Definition: lz4.c:1452
int LZ4_compress_destSize(const char *src, char *dst, int *srcSizePtr, int targetDstSize)
Definition: lz4.c:910
LZ4_stream_t * LZ4_createStream(void)
Definition: lz4.c:933
char * LZ4_slideInputBuffer(void *LZ4_Data)
Definition: lz4.c:1459
LZ4_streamDecode_t_internal internal_donotuse
Definition: lz4.h:404
unsigned int initCheck
Definition: lz4.h:361
int LZ4_loadDict(LZ4_stream_t *LZ4_dict, const char *dictionary, int dictSize)
Definition: lz4.c:955
int LZ4_compress_limitedOutput(const char *source, char *dest, int inputSize, int maxOutputSize)
Definition: lz4.c:1418
#define LZ4LIB_API
Definition: lz4.h:85
int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
Definition: lz4.c:1280
#define LZ4_HASH_SIZE_U32
Definition: lz4.h:335
int LZ4_setStreamDecode(LZ4_streamDecode_t *LZ4_streamDecode, const char *dictionary, int dictSize)
Definition: lz4.c:1308
unsigned int currentOffset
Definition: lz4.h:360
int LZ4_decompress_safe_partial(const char *source, char *dest, int compressedSize, int targetOutputSize, int maxDecompressedSize)
Definition: lz4.c:1275
int LZ4_resetStreamState(void *state, char *inputBuffer)
Definition: lz4.c:1445
int LZ4_uncompress_unknownOutputSize(const char *source, char *dest, int isize, int maxOutputSize)
Definition: lz4.c:1432
LZ4LIB_API char * inputBuffer
Definition: lz4.h:451
#define LZ4_STREAMSIZE_U64
Definition: lz4.h:384
unsigned char * bufferStart
Definition: lz4.h:363
int LZ4_freeStreamDecode(LZ4_streamDecode_t *LZ4_stream)
Definition: lz4.c:1294
LZ4_streamDecode_t * LZ4_createStreamDecode(void)
Definition: lz4.c:1288
#define LZ4_STREAMDECODESIZE_U64
Definition: lz4.h:400
int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest, int compressedSize, int maxOutputSize)
Definition: lz4.c:1468
const unsigned char * prefixEnd
Definition: lz4.h:370
int LZ4_decompress_safe(const char *source, char *dest, int compressedSize, int maxDecompressedSize)
Definition: lz4.c:1270
int LZ4_compress_fast_extState(void *state, const char *source, char *dest, int inputSize, int maxOutputSize, int acceleration)
Definition: lz4.c:677
int LZ4_compress_default(const char *source, char *dest, int inputSize, int maxOutputSize)
Definition: lz4.c:715
int LZ4_uncompress(const char *source, char *dest, int outputSize)
Definition: lz4.c:1431
unsigned long long table[LZ4_STREAMDECODESIZE_U64]
Definition: lz4.h:403
int LZ4_decompress_safe_continue(LZ4_streamDecode_t *LZ4_streamDecode, const char *source, char *dest, int compressedSize, int maxOutputSize)
Definition: lz4.c:1325
int LZ4_decompress_fast_withPrefix64k(const char *source, char *dest, int originalSize)
Definition: lz4.c:1473
const unsigned char * externalDict
Definition: lz4.h:368
LZ4LIB_API char int originalSize
Definition: lz4.h:456
LZ4LIB_API char int sourceSize
Definition: lz4.h:437
LZ4LIB_API char int int maxOutputSize
Definition: lz4.h:438
int LZ4_decompress_safe_usingDict(const char *source, char *dest, int compressedSize, int maxOutputSize, const char *dictStart, int dictSize)
Definition: lz4.c:1397
int LZ4_compress_withState(void *state, const char *src, char *dst, int srcSize)
Definition: lz4.c:1421
int LZ4_compress_fast(const char *source, char *dest, int inputSize, int maxOutputSize, int acceleration)
Definition: lz4.c:697
int LZ4_freeStream(LZ4_stream_t *LZ4_stream)
Definition: lz4.c:946
int LZ4_versionNumber(void)
Definition: lz4.c:411
void LZ4_resetStream(LZ4_stream_t *LZ4_stream)
Definition: lz4.c:941
#define LZ4_DEPRECATED(message)
Definition: lz4.h:432
unsigned int dictSize
Definition: lz4.h:364
LZ4LIB_API char int isize
Definition: lz4.h:446
LZ4_stream_t_internal internal_donotuse
Definition: lz4.h:388
int LZ4_sizeofState()
Definition: lz4.c:414
LZ4LIB_API char * dest
Definition: lz4.h:437
int LZ4_compress_continue(LZ4_stream_t *LZ4_stream, const char *source, char *dest, int inputSize)
Definition: lz4.c:1423
int LZ4_decompress_fast_usingDict(const char *source, char *dest, int originalSize, const char *dictStart, int dictSize)
Definition: lz4.c:1402
LZ4LIB_API char int compressedSize
Definition: lz4.h:455
LZ4LIB_API const char char int inputSize
Definition: lz4.h:439
LZ4LIB_API const char * source
Definition: lz4.h:439
int LZ4_compress_limitedOutput_withState(void *state, const char *src, char *dst, int srcSize, int dstSize)
Definition: lz4.c:1420
LZ4LIB_API char int outputSize
Definition: lz4.h:445
int LZ4_decompress_fast_continue(LZ4_streamDecode_t *LZ4_streamDecode, const char *source, char *dest, int originalSize)
Definition: lz4.c:1351
LZ4LIB_API char int int maxDstSize
Definition: lz4.h:455
int LZ4_sizeofStreamState()
Definition: lz4.c:1437
const char * LZ4_versionString(void)
Definition: lz4.c:412
int LZ4_compress_limitedOutput_continue(LZ4_stream_t *LZ4_stream, const char *src, char *dst, int srcSize, int maxDstSize)
Definition: lz4.c:1422
unsigned long long table[LZ4_STREAMSIZE_U64]
Definition: lz4.h:387
int LZ4_compress(const char *source, char *dest, int inputSize)
Definition: lz4.c:1419
int LZ4_compressBound(int isize)
Definition: lz4.c:413
int
Reads the categories file for map name in mapset and stores the categories in the pcats structure...
const unsigned char * dictionary
Definition: lz4.h:362
LZ4LIB_API char * dst
Definition: lz4.h:455
struct state state
Definition: parser.c:102
int LZ4_saveDict(LZ4_stream_t *LZ4_dict, char *safeBuffer, int dictSize)
Definition: lz4.c:1081
int LZ4_compress_fast_continue(LZ4_stream_t *LZ4_stream, const char *source, char *dest, int inputSize, int maxOutputSize, int acceleration)
Definition: lz4.c:1006