xref: /linux/lib/zstd/common/huf.h (revision 2aa14b1a)
1 /* ******************************************************************
2  * huff0 huffman codec,
3  * part of Finite State Entropy library
4  * Copyright (c) Yann Collet, Facebook, Inc.
5  *
6  * You can contact the author at :
7  * - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
8  *
9  * This source code is licensed under both the BSD-style license (found in the
10  * LICENSE file in the root directory of this source tree) and the GPLv2 (found
11  * in the COPYING file in the root directory of this source tree).
12  * You may select, at your option, one of the above-listed licenses.
13 ****************************************************************** */
14 
15 
16 #ifndef HUF_H_298734234
17 #define HUF_H_298734234
18 
19 /* *** Dependencies *** */
20 #include "zstd_deps.h"    /* size_t */
21 
22 
23 /* *** library symbols visibility *** */
24 /* Note : when linking with -fvisibility=hidden on gcc, or by default on Visual,
25  *        HUF symbols remain "private" (internal symbols for library only).
26  *        Set macro FSE_DLL_EXPORT to 1 if you want HUF symbols visible on DLL interface */
27 #if defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) && defined(__GNUC__) && (__GNUC__ >= 4)
28 #  define HUF_PUBLIC_API __attribute__ ((visibility ("default")))
29 #elif defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1)   /* Visual expected */
30 #  define HUF_PUBLIC_API __declspec(dllexport)
31 #elif defined(FSE_DLL_IMPORT) && (FSE_DLL_IMPORT==1)
32 #  define HUF_PUBLIC_API __declspec(dllimport)  /* not required, just to generate faster code (saves a function pointer load from IAT and an indirect jump) */
33 #else
34 #  define HUF_PUBLIC_API
35 #endif
36 
37 
38 /* ========================== */
39 /* ***  simple functions  *** */
40 /* ========================== */
41 
42 /* HUF_compress() :
43  *  Compress content from buffer 'src', of size 'srcSize', into buffer 'dst'.
44  * 'dst' buffer must be already allocated.
45  *  Compression runs faster if `dstCapacity` >= HUF_compressBound(srcSize).
46  * `srcSize` must be <= `HUF_BLOCKSIZE_MAX` == 128 KB.
47  * @return : size of compressed data (<= `dstCapacity`).
48  *  Special values : if return == 0, srcData is not compressible => Nothing is stored within dst !!!
49  *                   if HUF_isError(return), compression failed (more details using HUF_getErrorName())
50  */
51 HUF_PUBLIC_API size_t HUF_compress(void* dst, size_t dstCapacity,
52                              const void* src, size_t srcSize);
53 
54 /* HUF_decompress() :
55  *  Decompress HUF data from buffer 'cSrc', of size 'cSrcSize',
56  *  into already allocated buffer 'dst', of minimum size 'dstSize'.
57  * `originalSize` : **must** be the ***exact*** size of original (uncompressed) data.
58  *  Note : in contrast with FSE, HUF_decompress can regenerate
59  *         RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data,
60  *         because it knows size to regenerate (originalSize).
61  * @return : size of regenerated data (== originalSize),
62  *           or an error code, which can be tested using HUF_isError()
63  */
64 HUF_PUBLIC_API size_t HUF_decompress(void* dst,  size_t originalSize,
65                                const void* cSrc, size_t cSrcSize);
66 
67 
68 /* ***   Tool functions *** */
69 #define HUF_BLOCKSIZE_MAX (128 * 1024)                  /*< maximum input size for a single block compressed with HUF_compress */
70 HUF_PUBLIC_API size_t HUF_compressBound(size_t size);   /*< maximum compressed size (worst case) */
71 
72 /* Error Management */
73 HUF_PUBLIC_API unsigned    HUF_isError(size_t code);       /*< tells if a return value is an error code */
74 HUF_PUBLIC_API const char* HUF_getErrorName(size_t code);  /*< provides error code string (useful for debugging) */
75 
76 
77 /* ***   Advanced function   *** */
78 
79 /* HUF_compress2() :
80  *  Same as HUF_compress(), but offers control over `maxSymbolValue` and `tableLog`.
81  * `maxSymbolValue` must be <= HUF_SYMBOLVALUE_MAX .
82  * `tableLog` must be `<= HUF_TABLELOG_MAX` . */
83 HUF_PUBLIC_API size_t HUF_compress2 (void* dst, size_t dstCapacity,
84                                const void* src, size_t srcSize,
85                                unsigned maxSymbolValue, unsigned tableLog);
86 
87 /* HUF_compress4X_wksp() :
88  *  Same as HUF_compress2(), but uses externally allocated `workSpace`.
89  * `workspace` must be at least as large as HUF_WORKSPACE_SIZE */
90 #define HUF_WORKSPACE_SIZE ((8 << 10) + 512 /* sorting scratch space */)
91 #define HUF_WORKSPACE_SIZE_U64 (HUF_WORKSPACE_SIZE / sizeof(U64))
92 HUF_PUBLIC_API size_t HUF_compress4X_wksp (void* dst, size_t dstCapacity,
93                                      const void* src, size_t srcSize,
94                                      unsigned maxSymbolValue, unsigned tableLog,
95                                      void* workSpace, size_t wkspSize);
96 
97 #endif   /* HUF_H_298734234 */
98 
99 /* ******************************************************************
100  *  WARNING !!
101  *  The following section contains advanced and experimental definitions
102  *  which shall never be used in the context of a dynamic library,
103  *  because they are not guaranteed to remain stable in the future.
104  *  Only consider them in association with static linking.
105  * *****************************************************************/
106 #if !defined(HUF_H_HUF_STATIC_LINKING_ONLY)
107 #define HUF_H_HUF_STATIC_LINKING_ONLY
108 
109 /* *** Dependencies *** */
110 #include "mem.h"   /* U32 */
111 #define FSE_STATIC_LINKING_ONLY
112 #include "fse.h"
113 
114 
115 /* *** Constants *** */
116 #define HUF_TABLELOG_MAX      12      /* max runtime value of tableLog (due to static allocation); can be modified up to HUF_TABLELOG_ABSOLUTEMAX */
117 #define HUF_TABLELOG_DEFAULT  11      /* default tableLog value when none specified */
118 #define HUF_SYMBOLVALUE_MAX  255
119 
120 #define HUF_TABLELOG_ABSOLUTEMAX  12  /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
121 #if (HUF_TABLELOG_MAX > HUF_TABLELOG_ABSOLUTEMAX)
122 #  error "HUF_TABLELOG_MAX is too large !"
123 #endif
124 
125 
126 /* ****************************************
127 *  Static allocation
128 ******************************************/
129 /* HUF buffer bounds */
130 #define HUF_CTABLEBOUND 129
131 #define HUF_BLOCKBOUND(size) (size + (size>>8) + 8)   /* only true when incompressible is pre-filtered with fast heuristic */
132 #define HUF_COMPRESSBOUND(size) (HUF_CTABLEBOUND + HUF_BLOCKBOUND(size))   /* Macro version, useful for static allocation */
133 
134 /* static allocation of HUF's Compression Table */
135 /* this is a private definition, just exposed for allocation and strict aliasing purpose. never EVER access its members directly */
136 typedef size_t HUF_CElt;   /* consider it an incomplete type */
137 #define HUF_CTABLE_SIZE_ST(maxSymbolValue)   ((maxSymbolValue)+2)   /* Use tables of size_t, for proper alignment */
138 #define HUF_CTABLE_SIZE(maxSymbolValue)       (HUF_CTABLE_SIZE_ST(maxSymbolValue) * sizeof(size_t))
139 #define HUF_CREATE_STATIC_CTABLE(name, maxSymbolValue) \
140     HUF_CElt name[HUF_CTABLE_SIZE_ST(maxSymbolValue)] /* no final ; */
141 
142 /* static allocation of HUF's DTable */
143 typedef U32 HUF_DTable;
144 #define HUF_DTABLE_SIZE(maxTableLog)   (1 + (1<<(maxTableLog)))
145 #define HUF_CREATE_STATIC_DTABLEX1(DTable, maxTableLog) \
146         HUF_DTable DTable[HUF_DTABLE_SIZE((maxTableLog)-1)] = { ((U32)((maxTableLog)-1) * 0x01000001) }
147 #define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \
148         HUF_DTable DTable[HUF_DTABLE_SIZE(maxTableLog)] = { ((U32)(maxTableLog) * 0x01000001) }
149 
150 
151 /* ****************************************
152 *  Advanced decompression functions
153 ******************************************/
154 size_t HUF_decompress4X1 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
155 #ifndef HUF_FORCE_DECOMPRESS_X1
156 size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
157 #endif
158 
159 size_t HUF_decompress4X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< decodes RLE and uncompressed */
160 size_t HUF_decompress4X_hufOnly(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /*< considers RLE and uncompressed as errors */
161 size_t HUF_decompress4X_hufOnly_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /*< considers RLE and uncompressed as errors */
162 size_t HUF_decompress4X1_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
163 size_t HUF_decompress4X1_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< single-symbol decoder */
164 #ifndef HUF_FORCE_DECOMPRESS_X1
165 size_t HUF_decompress4X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
166 size_t HUF_decompress4X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< double-symbols decoder */
167 #endif
168 
169 
170 /* ****************************************
171  *  HUF detailed API
172  * ****************************************/
173 
174 /*! HUF_compress() does the following:
175  *  1. count symbol occurrence from source[] into table count[] using FSE_count() (exposed within "fse.h")
176  *  2. (optional) refine tableLog using HUF_optimalTableLog()
177  *  3. build Huffman table from count using HUF_buildCTable()
178  *  4. save Huffman table to memory buffer using HUF_writeCTable()
179  *  5. encode the data stream using HUF_compress4X_usingCTable()
180  *
181  *  The following API allows targeting specific sub-functions for advanced tasks.
182  *  For example, it's possible to compress several blocks using the same 'CTable',
183  *  or to save and regenerate 'CTable' using external methods.
184  */
185 unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue);
186 size_t HUF_buildCTable (HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue, unsigned maxNbBits);   /* @return : maxNbBits; CTable and count can overlap. In which case, CTable will overwrite count content */
187 size_t HUF_writeCTable (void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog);
188 size_t HUF_writeCTable_wksp(void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog, void* workspace, size_t workspaceSize);
189 size_t HUF_compress4X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable);
190 size_t HUF_compress4X_usingCTable_bmi2(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable, int bmi2);
191 size_t HUF_estimateCompressedSize(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue);
192 int HUF_validateCTable(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue);
193 
194 typedef enum {
195    HUF_repeat_none,  /*< Cannot use the previous table */
196    HUF_repeat_check, /*< Can use the previous table but it must be checked. Note : The previous table must have been constructed by HUF_compress{1, 4}X_repeat */
197    HUF_repeat_valid  /*< Can use the previous table and it is assumed to be valid */
198  } HUF_repeat;
199 /* HUF_compress4X_repeat() :
200  *  Same as HUF_compress4X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
201  *  If it uses hufTable it does not modify hufTable or repeat.
202  *  If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
203  *  If preferRepeat then the old table will always be used if valid.
204  *  If suspectUncompressible then some sampling checks will be run to potentially skip huffman coding */
205 size_t HUF_compress4X_repeat(void* dst, size_t dstSize,
206                        const void* src, size_t srcSize,
207                        unsigned maxSymbolValue, unsigned tableLog,
208                        void* workSpace, size_t wkspSize,    /*< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */
209                        HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2, unsigned suspectUncompressible);
210 
211 /* HUF_buildCTable_wksp() :
212  *  Same as HUF_buildCTable(), but using externally allocated scratch buffer.
213  * `workSpace` must be aligned on 4-bytes boundaries, and its size must be >= HUF_CTABLE_WORKSPACE_SIZE.
214  */
215 #define HUF_CTABLE_WORKSPACE_SIZE_U32 (2*HUF_SYMBOLVALUE_MAX +1 +1)
216 #define HUF_CTABLE_WORKSPACE_SIZE (HUF_CTABLE_WORKSPACE_SIZE_U32 * sizeof(unsigned))
217 size_t HUF_buildCTable_wksp (HUF_CElt* tree,
218                        const unsigned* count, U32 maxSymbolValue, U32 maxNbBits,
219                              void* workSpace, size_t wkspSize);
220 
221 /*! HUF_readStats() :
222  *  Read compact Huffman tree, saved by HUF_writeCTable().
223  * `huffWeight` is destination buffer.
224  * @return : size read from `src` , or an error Code .
225  *  Note : Needed by HUF_readCTable() and HUF_readDTableXn() . */
226 size_t HUF_readStats(BYTE* huffWeight, size_t hwSize,
227                      U32* rankStats, U32* nbSymbolsPtr, U32* tableLogPtr,
228                      const void* src, size_t srcSize);
229 
230 /*! HUF_readStats_wksp() :
231  * Same as HUF_readStats() but takes an external workspace which must be
232  * 4-byte aligned and its size must be >= HUF_READ_STATS_WORKSPACE_SIZE.
233  * If the CPU has BMI2 support, pass bmi2=1, otherwise pass bmi2=0.
234  */
235 #define HUF_READ_STATS_WORKSPACE_SIZE_U32 FSE_DECOMPRESS_WKSP_SIZE_U32(6, HUF_TABLELOG_MAX-1)
236 #define HUF_READ_STATS_WORKSPACE_SIZE (HUF_READ_STATS_WORKSPACE_SIZE_U32 * sizeof(unsigned))
237 size_t HUF_readStats_wksp(BYTE* huffWeight, size_t hwSize,
238                           U32* rankStats, U32* nbSymbolsPtr, U32* tableLogPtr,
239                           const void* src, size_t srcSize,
240                           void* workspace, size_t wkspSize,
241                           int bmi2);
242 
243 /* HUF_readCTable() :
244  *  Loading a CTable saved with HUF_writeCTable() */
245 size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize, unsigned *hasZeroWeights);
246 
247 /* HUF_getNbBitsFromCTable() :
248  *  Read nbBits from CTable symbolTable, for symbol `symbolValue` presumed <= HUF_SYMBOLVALUE_MAX
249  *  Note 1 : is not inlined, as HUF_CElt definition is private */
250 U32 HUF_getNbBitsFromCTable(const HUF_CElt* symbolTable, U32 symbolValue);
251 
252 /*
253  * HUF_decompress() does the following:
254  * 1. select the decompression algorithm (X1, X2) based on pre-computed heuristics
255  * 2. build Huffman table from save, using HUF_readDTableX?()
256  * 3. decode 1 or 4 segments in parallel using HUF_decompress?X?_usingDTable()
257  */
258 
259 /* HUF_selectDecoder() :
260  *  Tells which decoder is likely to decode faster,
261  *  based on a set of pre-computed metrics.
262  * @return : 0==HUF_decompress4X1, 1==HUF_decompress4X2 .
263  *  Assumption : 0 < dstSize <= 128 KB */
264 U32 HUF_selectDecoder (size_t dstSize, size_t cSrcSize);
265 
266 /*
267  *  The minimum workspace size for the `workSpace` used in
268  *  HUF_readDTableX1_wksp() and HUF_readDTableX2_wksp().
269  *
270  *  The space used depends on HUF_TABLELOG_MAX, ranging from ~1500 bytes when
271  *  HUF_TABLE_LOG_MAX=12 to ~1850 bytes when HUF_TABLE_LOG_MAX=15.
272  *  Buffer overflow errors may potentially occur if code modifications result in
273  *  a required workspace size greater than that specified in the following
274  *  macro.
275  */
276 #define HUF_DECOMPRESS_WORKSPACE_SIZE ((2 << 10) + (1 << 9))
277 #define HUF_DECOMPRESS_WORKSPACE_SIZE_U32 (HUF_DECOMPRESS_WORKSPACE_SIZE / sizeof(U32))
278 
279 #ifndef HUF_FORCE_DECOMPRESS_X2
280 size_t HUF_readDTableX1 (HUF_DTable* DTable, const void* src, size_t srcSize);
281 size_t HUF_readDTableX1_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize);
282 #endif
283 #ifndef HUF_FORCE_DECOMPRESS_X1
284 size_t HUF_readDTableX2 (HUF_DTable* DTable, const void* src, size_t srcSize);
285 size_t HUF_readDTableX2_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize);
286 #endif
287 
288 size_t HUF_decompress4X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
289 #ifndef HUF_FORCE_DECOMPRESS_X2
290 size_t HUF_decompress4X1_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
291 #endif
292 #ifndef HUF_FORCE_DECOMPRESS_X1
293 size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
294 #endif
295 
296 
297 /* ====================== */
298 /* single stream variants */
299 /* ====================== */
300 
301 size_t HUF_compress1X (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog);
302 size_t HUF_compress1X_wksp (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void* workSpace, size_t wkspSize);  /*< `workSpace` must be a table of at least HUF_WORKSPACE_SIZE_U64 U64 */
303 size_t HUF_compress1X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable);
304 size_t HUF_compress1X_usingCTable_bmi2(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable, int bmi2);
305 /* HUF_compress1X_repeat() :
306  *  Same as HUF_compress1X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
307  *  If it uses hufTable it does not modify hufTable or repeat.
308  *  If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
309  *  If preferRepeat then the old table will always be used if valid.
310  *  If suspectUncompressible then some sampling checks will be run to potentially skip huffman coding */
311 size_t HUF_compress1X_repeat(void* dst, size_t dstSize,
312                        const void* src, size_t srcSize,
313                        unsigned maxSymbolValue, unsigned tableLog,
314                        void* workSpace, size_t wkspSize,   /*< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */
315                        HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2, unsigned suspectUncompressible);
316 
317 size_t HUF_decompress1X1 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /* single-symbol decoder */
318 #ifndef HUF_FORCE_DECOMPRESS_X1
319 size_t HUF_decompress1X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /* double-symbol decoder */
320 #endif
321 
322 size_t HUF_decompress1X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);
323 size_t HUF_decompress1X_DCtx_wksp (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);
324 #ifndef HUF_FORCE_DECOMPRESS_X2
325 size_t HUF_decompress1X1_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
326 size_t HUF_decompress1X1_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< single-symbol decoder */
327 #endif
328 #ifndef HUF_FORCE_DECOMPRESS_X1
329 size_t HUF_decompress1X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
330 size_t HUF_decompress1X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< double-symbols decoder */
331 #endif
332 
333 size_t HUF_decompress1X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);   /*< automatic selection of sing or double symbol decoder, based on DTable */
334 #ifndef HUF_FORCE_DECOMPRESS_X2
335 size_t HUF_decompress1X1_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
336 #endif
337 #ifndef HUF_FORCE_DECOMPRESS_X1
338 size_t HUF_decompress1X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
339 #endif
340 
341 /* BMI2 variants.
342  * If the CPU has BMI2 support, pass bmi2=1, otherwise pass bmi2=0.
343  */
344 size_t HUF_decompress1X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2);
345 #ifndef HUF_FORCE_DECOMPRESS_X2
346 size_t HUF_decompress1X1_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2);
347 #endif
348 size_t HUF_decompress4X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2);
349 size_t HUF_decompress4X_hufOnly_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2);
350 #ifndef HUF_FORCE_DECOMPRESS_X2
351 size_t HUF_readDTableX1_wksp_bmi2(HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize, int bmi2);
352 #endif
353 #ifndef HUF_FORCE_DECOMPRESS_X1
354 size_t HUF_readDTableX2_wksp_bmi2(HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize, int bmi2);
355 #endif
356 
357 #endif /* HUF_STATIC_LINKING_ONLY */
358 
359