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)
36extern "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_VISIBILITY :
76* Control library symbols visibility.
77*/
78#ifndef LZ4LIB_VISIBILITY
79# if defined(__GNUC__) && (__GNUC__ >= 4)
80# define LZ4LIB_VISIBILITY __attribute__ ((visibility ("default")))
81# else
82# define LZ4LIB_VISIBILITY
83# endif
84#endif
85#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
86# define LZ4LIB_API __declspec(dllexport) LZ4LIB_VISIBILITY
87#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
88# define LZ4LIB_API __declspec(dllimport) LZ4LIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
89#else
90# define LZ4LIB_API LZ4LIB_VISIBILITY
91#endif
92
93/*------ Version ------*/
94#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
95#define LZ4_VERSION_MINOR 8 /* for new (non-breaking) interface capabilities */
96#define LZ4_VERSION_RELEASE 0 /* for tweaks, bug-fixes, or development */
97
98#define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
99
100#define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
101#define LZ4_QUOTE(str) #str
102#define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
103#define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
104
105LZ4LIB_API int LZ4_versionNumber (void); /**< library version number; to be used when checking dll version */
106LZ4LIB_API const char* LZ4_versionString (void); /**< library version string; to be used when checking dll version */
107
108
109/*-************************************
110* Tuning parameter
111**************************************/
112/*!
113 * LZ4_MEMORY_USAGE :
114 * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
115 * Increasing memory usage improves compression ratio
116 * Reduced memory usage can improve speed, due to cache effect
117 * Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
118 */
119#ifndef LZ4_MEMORY_USAGE
120# define LZ4_MEMORY_USAGE 14
121#endif
122
123/*-************************************
124* Simple Functions
125**************************************/
126/*! LZ4_compress_default() :
127 Compresses 'srcSize' bytes from buffer 'src'
128 into already allocated 'dst' buffer of size 'dstCapacity'.
129 Compression is guaranteed to succeed if 'dstCapacity' >= LZ4_compressBound(srcSize).
130 It also runs faster, so it's a recommended setting.
131 If the function cannot compress 'src' into a limited 'dst' budget,
132 compression stops *immediately*, and the function result is zero.
133 As a consequence, 'dst' content is not valid.
134 This function never writes outside 'dst' buffer, nor read outside 'source' buffer.
135 srcSize : supported max value is LZ4_MAX_INPUT_VALUE
136 dstCapacity : full or partial size of buffer 'dst' (which must be already allocated)
137 return : the number of bytes written into buffer 'dst' (necessarily <= dstCapacity)
138 or 0 if compression fails */
139LZ4LIB_API int LZ4_compress_default(const char* src, char* dst, int srcSize, int dstCapacity);
140
141/*! LZ4_decompress_safe() :
142 compressedSize : is the exact complete size of the compressed block.
143 dstCapacity : is the size of destination buffer, which must be already allocated.
144 return : the number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
145 If destination buffer is not large enough, decoding will stop and output an error code (negative value).
146 If the source stream is detected malformed, the function will stop decoding and return a negative result.
147 This function is protected against buffer overflow exploits, including malicious data packets.
148 It never writes outside output buffer, nor reads outside input buffer.
149*/
150LZ4LIB_API int LZ4_decompress_safe (const char* src, char* dst, int compressedSize, int dstCapacity);
151
152
153/*-************************************
154* Advanced Functions
155**************************************/
156#define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
157#define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
158
159/*!
160LZ4_compressBound() :
161 Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
162 This function is primarily useful for memory allocation purposes (destination buffer size).
163 Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
164 Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
165 inputSize : max supported value is LZ4_MAX_INPUT_SIZE
166 return : maximum output size in a "worst case" scenario
167 or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
168*/
169LZ4LIB_API int LZ4_compressBound(int inputSize);
170
171/*!
172LZ4_compress_fast() :
173 Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
174 The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
175 It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
176 An acceleration value of "1" is the same as regular LZ4_compress_default()
177 Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
178*/
179LZ4LIB_API int LZ4_compress_fast (const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
180
181
182/*!
183LZ4_compress_fast_extState() :
184 Same compression function, just using an externally allocated memory space to store compression state.
185 Use LZ4_sizeofState() to know how much memory must be allocated,
186 and allocate it on 8-bytes boundaries (using malloc() typically).
187 Then, provide it as 'void* state' to compression function.
188*/
189LZ4LIB_API int LZ4_sizeofState(void);
190LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
191
192
193/*!
194LZ4_compress_destSize() :
195 Reverse the logic : compresses as much data as possible from 'src' buffer
196 into already allocated buffer 'dst' of size 'targetDestSize'.
197 This function either compresses the entire 'src' content into 'dst' if it's large enough,
198 or fill 'dst' buffer completely with as much data as possible from 'src'.
199 *srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
200 New value is necessarily <= old value.
201 return : Nb bytes written into 'dst' (necessarily <= targetDestSize)
202 or 0 if compression fails
203*/
204LZ4LIB_API int LZ4_compress_destSize (const char* src, char* dst, int* srcSizePtr, int targetDstSize);
205
206
207/*!
208LZ4_decompress_fast() : (unsafe!!)
209 originalSize : is the original uncompressed size
210 return : the number of bytes read from the source buffer (in other words, the compressed size)
211 If the source stream is detected malformed, the function will stop decoding and return a negative result.
212 Destination buffer must be already allocated. Its size must be >= 'originalSize' bytes.
213 note : This function respects memory boundaries for *properly formed* compressed data.
214 It is a bit faster than LZ4_decompress_safe().
215 However, it does not provide any protection against intentionally modified data stream (malicious input).
216 Use this function in trusted environment only (data to decode comes from a trusted source).
217*/
218LZ4LIB_API int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
219
220/*!
221LZ4_decompress_safe_partial() :
222 This function decompress a compressed block of size 'srcSize' at position 'src'
223 into destination buffer 'dst' of size 'dstCapacity'.
224 The function will decompress a minimum of 'targetOutputSize' bytes, and stop after that.
225 However, it's not accurate, and may write more than 'targetOutputSize' (but <= dstCapacity).
226 @return : the number of bytes decoded in the destination buffer (necessarily <= dstCapacity)
227 Note : this number can be < 'targetOutputSize' should the compressed block contain less data.
228 Always control how many bytes were decoded.
229 If the source stream is detected malformed, the function will stop decoding and return a negative result.
230 This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets.
231*/
232LZ4LIB_API int LZ4_decompress_safe_partial (const char* src, char* dst, int srcSize, int targetOutputSize, int dstCapacity);
233
234
235/*-*********************************************
236* Streaming Compression Functions
237***********************************************/
238typedef union LZ4_stream_u LZ4_stream_t; /* incomplete type (defined later) */
239
240/*! LZ4_createStream() and LZ4_freeStream() :
241 * LZ4_createStream() will allocate and initialize an `LZ4_stream_t` structure.
242 * LZ4_freeStream() releases its memory.
243 */
244LZ4LIB_API LZ4_stream_t* LZ4_createStream(void);
245LZ4LIB_API int LZ4_freeStream (LZ4_stream_t* streamPtr);
246
247/*! LZ4_resetStream() :
248 * An LZ4_stream_t structure can be allocated once and re-used multiple times.
249 * Use this function to start compressing a new stream.
250 */
251LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
252
253/*! LZ4_loadDict() :
254 * Use this function to load a static dictionary into LZ4_stream_t.
255 * Any previous data will be forgotten, only 'dictionary' will remain in memory.
256 * Loading a size of 0 is allowed, and is the same as reset.
257 * @return : dictionary size, in bytes (necessarily <= 64 KB)
258 */
259LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
260
261/*! LZ4_compress_fast_continue() :
262 * Compress content into 'src' using data from previously compressed blocks, improving compression ratio.
263 * 'dst' buffer must be already allocated.
264 * If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
265 *
266 * Important : Up to 64KB of previously compressed data is assumed to remain present and unmodified in memory !
267 * Special 1 : If input buffer is a double-buffer, it can have any size, including < 64 KB.
268 * Special 2 : If input buffer is a ring-buffer, it can have any size, including < 64 KB.
269 *
270 * @return : size of compressed block
271 * or 0 if there is an error (typically, compressed data cannot fit into 'dst')
272 * After an error, the stream status is invalid, it can only be reset or freed.
273 */
274LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
275
276/*! LZ4_saveDict() :
277 * If previously compressed data block is not guaranteed to remain available at its current memory location,
278 * save it into a safer place (char* safeBuffer).
279 * Note : it's not necessary to call LZ4_loadDict() after LZ4_saveDict(), dictionary is immediately usable.
280 * @return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
281 */
282LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
283
284
285/*-**********************************************
286* Streaming Decompression Functions
287* Bufferless synchronous API
288************************************************/
289typedef union LZ4_streamDecode_u LZ4_streamDecode_t; /* incomplete type (defined later) */
290
291/*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
292 * creation / destruction of streaming decompression tracking structure.
293 * A tracking structure can be re-used multiple times sequentially. */
294LZ4LIB_API LZ4_streamDecode_t* LZ4_createStreamDecode(void);
295LZ4LIB_API int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
296
297/*! LZ4_setStreamDecode() :
298 * An LZ4_streamDecode_t structure can be allocated once and re-used multiple times.
299 * Use this function to start decompression of a new stream of blocks.
300 * A dictionary can optionnally be set. Use NULL or size 0 for a simple reset order.
301 * @return : 1 if OK, 0 if error
302 */
303LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
304
305/*! LZ4_decompress_*_continue() :
306 * These decoding functions allow decompression of consecutive blocks in "streaming" mode.
307 * A block is an unsplittable entity, it must be presented entirely to a decompression function.
308 * Decompression functions only accept one block at a time.
309 * Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB).
310 *
311 * Special : if application sets a ring buffer for decompression, it must respect one of the following conditions :
312 * - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
313 * In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
314 * - Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
315 * maxBlockSize is implementation dependent. It's the maximum size of any single block.
316 * In which case, encoding and decoding buffers do not need to be synchronized,
317 * and encoding ring buffer can have any size, including small ones ( < 64 KB).
318 * - _At least_ 64 KB + 8 bytes + maxBlockSize.
319 * In which case, encoding and decoding buffers do not need to be synchronized,
320 * and encoding ring buffer can have any size, including larger than decoding buffer.
321 * Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
322 * and indicate where it is saved using LZ4_setStreamDecode() before decompressing next block.
323*/
324LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* src, char* dst, int srcSize, int dstCapacity);
325LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* src, char* dst, int originalSize);
326
327
328/*! LZ4_decompress_*_usingDict() :
329 * These decoding functions work the same as
330 * a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
331 * They are stand-alone, and don't need an LZ4_streamDecode_t structure.
332 */
333LZ4LIB_API int LZ4_decompress_safe_usingDict (const char* src, char* dst, int srcSize, int dstCapcity, const char* dictStart, int dictSize);
334LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize, const char* dictStart, int dictSize);
335
336
337/*^**********************************************
338 * !!!!!! STATIC LINKING ONLY !!!!!!
339 ***********************************************/
340/*-************************************
341 * Private definitions
342 **************************************
343 * Do not use these definitions.
344 * They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
345 * Using these definitions will expose code to API and/or ABI break in future versions of the library.
346 **************************************/
347#define LZ4_HASHLOG (LZ4_MEMORY_USAGE-2)
348#define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
349#define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG) /* required as macro for static allocation */
350
351#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
352#include <stdint.h>
353
354typedef struct {
355 uint32_t hashTable[LZ4_HASH_SIZE_U32];
356 uint32_t currentOffset;
357 uint32_t initCheck;
358 const uint8_t* dictionary;
359 uint8_t* bufferStart; /* obsolete, used for slideInputBuffer */
360 uint32_t dictSize;
361} LZ4_stream_t_internal;
362
363typedef struct {
364 const uint8_t* externalDict;
365 size_t extDictSize;
366 const uint8_t* prefixEnd;
367 size_t prefixSize;
368} LZ4_streamDecode_t_internal;
369
370#else
371
372typedef struct {
373 unsigned int hashTable[LZ4_HASH_SIZE_U32];
374 unsigned int currentOffset;
375 unsigned int initCheck;
376 const unsigned char* dictionary;
377 unsigned char* bufferStart; /* obsolete, used for slideInputBuffer */
378 unsigned int dictSize;
379} LZ4_stream_t_internal;
380
381typedef struct {
382 const unsigned char* externalDict;
383 size_t extDictSize;
384 const unsigned char* prefixEnd;
385 size_t prefixSize;
386} LZ4_streamDecode_t_internal;
387
388#endif
389
390/*!
391 * LZ4_stream_t :
392 * information structure to track an LZ4 stream.
393 * init this structure before first use.
394 * note : only use in association with static linking !
395 * this definition is not API/ABI safe,
396 * it may change in a future version !
397 */
398#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
399#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
400union LZ4_stream_u {
401 unsigned long long table[LZ4_STREAMSIZE_U64];
402 LZ4_stream_t_internal internal_donotuse;
403} ; /* previously typedef'd to LZ4_stream_t */
404
405
406/*!
407 * LZ4_streamDecode_t :
408 * information structure to track an LZ4 stream during decompression.
409 * init this structure using LZ4_setStreamDecode (or memset()) before first use
410 * note : only use in association with static linking !
411 * this definition is not API/ABI safe,
412 * and may change in a future version !
413 */
414#define LZ4_STREAMDECODESIZE_U64 4
415#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
416union LZ4_streamDecode_u {
417 unsigned long long table[LZ4_STREAMDECODESIZE_U64];
418 LZ4_streamDecode_t_internal internal_donotuse;
419} ; /* previously typedef'd to LZ4_streamDecode_t */
420
421
422/*-************************************
423* Obsolete Functions
424**************************************/
425
426/*! Deprecation warnings
427 Should deprecation warnings be a problem,
428 it is generally possible to disable them,
429 typically with -Wno-deprecated-declarations for gcc
430 or _CRT_SECURE_NO_WARNINGS in Visual.
431 Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS */
432#ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
433# define LZ4_DEPRECATED(message) /* disable deprecation warnings */
434#else
435# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
436# if defined(__clang__) /* clang doesn't handle mixed C++11 and CNU attributes */
437# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
438# elif defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
439# define LZ4_DEPRECATED(message) [[deprecated(message)]]
440# elif (LZ4_GCC_VERSION >= 405)
441# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
442# elif (LZ4_GCC_VERSION >= 301)
443# define LZ4_DEPRECATED(message) __attribute__((deprecated))
444# elif defined(_MSC_VER)
445# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
446# else
447# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
448# define LZ4_DEPRECATED(message)
449# endif
450#endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
451
452/* Obsolete compression functions */
453LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress (const char* source, char* dest, int sourceSize);
454LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
455LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
456LZ4LIB_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);
457LZ4LIB_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);
458LZ4LIB_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);
459
460/* Obsolete decompression functions */
461LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast() instead") int LZ4_uncompress (const char* source, char* dest, int outputSize);
462LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe() instead") int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
463
464/* Obsolete streaming functions; use new streaming interface whenever possible */
465LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
466LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
467LZ4LIB_API LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
468LZ4LIB_API LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
469
470/* Obsolete streaming decoding functions */
471LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
472LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
473
474#endif /* LZ4_H_2983827168210 */
475
476
477#if defined (__cplusplus)
478}
479#endif
480