1 /*
2 * Copyright (c) 2016-2021, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
3 * All rights reserved.
4 *
5 * This source code is licensed under both the BSD-style license (found in the
6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
7 * in the COPYING file in the root directory of this source tree).
8 * You may select, at your option, one of the above-listed licenses.
9 */
10
11
12 /* === Tuning parameters === */
13 #ifndef ZWRAP_USE_ZSTD
14 #define ZWRAP_USE_ZSTD 0
15 #endif
16
17
18 /* === Dependencies === */
19 #include <stdlib.h>
20 #include <stdio.h> /* vsprintf */
21 #include <stdarg.h> /* va_list, for z_gzprintf */
22 #include <string.h>
23 #define NO_DUMMY_DECL
24 #define ZLIB_CONST
25 #include <zlib.h> /* without #define Z_PREFIX */
26 #include "zstd_zlibwrapper.h"
27 #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_isFrame, ZSTD_MAGICNUMBER, ZSTD_customMem */
28 #include "zstd.h"
29
30
31 /* === Constants === */
32 #define Z_INFLATE_SYNC 8
33 #define ZLIB_HEADERSIZE 4
34 #define ZSTD_HEADERSIZE ZSTD_FRAMEHEADERSIZE_MIN(ZSTD_f_zstd1)
35 #define ZWRAP_DEFAULT_CLEVEL 3 /* Z_DEFAULT_COMPRESSION is translated to ZWRAP_DEFAULT_CLEVEL for zstd */
36
37
38 /* === Debug === */
39 #define LOG_WRAPPERC(...) /* fprintf(stderr, __VA_ARGS__) */
40 #define LOG_WRAPPERD(...) /* fprintf(stderr, __VA_ARGS__) */
41
42 #define FINISH_WITH_GZ_ERR(msg) { (void)msg; return Z_STREAM_ERROR; }
43 #define FINISH_WITH_NULL_ERR(msg) { (void)msg; return NULL; }
44
45 /* === Utility === */
46
47 #define MIN(x,y) ((x) < (y) ? (x) : (y))
48
ZWRAP_isLittleEndian(void)49 static unsigned ZWRAP_isLittleEndian(void)
50 {
51 const union { unsigned u; char c[4]; } one = { 1 }; /* don't use static : performance detrimental */
52 return one.c[0];
53 }
54
55 #ifndef __has_builtin
56 # define __has_builtin(x) 0
57 #endif
58
ZWRAP_swap32(unsigned in)59 static unsigned ZWRAP_swap32(unsigned in)
60 {
61 #if defined(_MSC_VER) /* Visual Studio */
62 return _byteswap_ulong(in);
63 #elif (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \
64 || (defined(__clang__) && __has_builtin(__builtin_bswap32))
65 return __builtin_bswap32(in);
66 #else
67 return ((in << 24) & 0xff000000 ) |
68 ((in << 8) & 0x00ff0000 ) |
69 ((in >> 8) & 0x0000ff00 ) |
70 ((in >> 24) & 0x000000ff );
71 #endif
72 }
73
ZWRAP_readLE32(const void * ptr)74 static unsigned ZWRAP_readLE32(const void* ptr)
75 {
76 unsigned value;
77 memcpy(&value, ptr, sizeof(value));
78 if (ZWRAP_isLittleEndian())
79 return value;
80 else
81 return ZWRAP_swap32(value);
82 }
83
84
85 /* === Wrapper === */
86 static int g_ZWRAP_useZSTDcompression = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */
87
ZWRAP_useZSTDcompression(int turn_on)88 void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; }
89
ZWRAP_isUsingZSTDcompression(void)90 int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; }
91
92
93
94 static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO;
95
ZWRAP_setDecompressionType(ZWRAP_decompress_type type)96 void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; }
97
ZWRAP_getDecompressionType(void)98 ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; }
99
100
101
zstdVersion(void)102 const char * zstdVersion(void) { return ZSTD_VERSION_STRING; }
103
z_zlibVersion(void)104 ZEXTERN const char * ZEXPORT z_zlibVersion OF((void)) { return zlibVersion(); }
105
ZWRAP_allocFunction(void * opaque,size_t size)106 static void* ZWRAP_allocFunction(void* opaque, size_t size)
107 {
108 z_streamp strm = (z_streamp) opaque;
109 void* address = strm->zalloc(strm->opaque, 1, (uInt)size);
110 /* LOG_WRAPPERC("ZWRAP alloc %p, %d \n", address, (int)size); */
111 return address;
112 }
113
ZWRAP_freeFunction(void * opaque,void * address)114 static void ZWRAP_freeFunction(void* opaque, void* address)
115 {
116 z_streamp strm = (z_streamp) opaque;
117 strm->zfree(strm->opaque, address);
118 /* if (address) LOG_WRAPPERC("ZWRAP free %p \n", address); */
119 }
120
ZWRAP_customMalloc(size_t size,ZSTD_customMem customMem)121 static void* ZWRAP_customMalloc(size_t size, ZSTD_customMem customMem)
122 {
123 if (customMem.customAlloc)
124 return customMem.customAlloc(customMem.opaque, size);
125 return malloc(size);
126 }
127
ZWRAP_customCalloc(size_t size,ZSTD_customMem customMem)128 static void* ZWRAP_customCalloc(size_t size, ZSTD_customMem customMem)
129 {
130 if (customMem.customAlloc) {
131 /* calloc implemented as malloc+memset;
132 * not as efficient as calloc, but next best guess for custom malloc */
133 void* const ptr = customMem.customAlloc(customMem.opaque, size);
134 memset(ptr, 0, size);
135 return ptr;
136 }
137 return calloc(1, size);
138 }
139
ZWRAP_customFree(void * ptr,ZSTD_customMem customMem)140 static void ZWRAP_customFree(void* ptr, ZSTD_customMem customMem)
141 {
142 if (ptr!=NULL) {
143 if (customMem.customFree)
144 customMem.customFree(customMem.opaque, ptr);
145 else
146 free(ptr);
147 }
148 }
149
150
151
152 /* === Compression === */
153 typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t;
154
155 typedef struct {
156 ZSTD_CStream* zbc;
157 int compressionLevel;
158 int streamEnd; /* a flag to signal the end of a stream */
159 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
160 ZSTD_customMem customMem;
161 z_stream allocFunc; /* copy of zalloc, zfree, opaque */
162 ZSTD_inBuffer inBuffer;
163 ZSTD_outBuffer outBuffer;
164 ZWRAP_state_t comprState;
165 unsigned long long pledgedSrcSize;
166 } ZWRAP_CCtx;
167
168 /* typedef ZWRAP_CCtx internal_state; */
169
170
171
ZWRAP_freeCCtx(ZWRAP_CCtx * zwc)172 static size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc)
173 {
174 if (zwc==NULL) return 0; /* support free on NULL */
175 ZSTD_freeCStream(zwc->zbc);
176 ZWRAP_customFree(zwc, zwc->customMem);
177 return 0;
178 }
179
180
ZWRAP_createCCtx(z_streamp strm)181 static ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm)
182 {
183 ZWRAP_CCtx* zwc;
184 ZSTD_customMem customMem = { NULL, NULL, NULL };
185
186 if (strm->zalloc && strm->zfree) {
187 customMem.customAlloc = ZWRAP_allocFunction;
188 customMem.customFree = ZWRAP_freeFunction;
189 }
190 customMem.opaque = strm;
191
192 zwc = (ZWRAP_CCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_CCtx), customMem);
193 if (zwc == NULL) return NULL;
194 zwc->allocFunc = *strm;
195 customMem.opaque = &zwc->allocFunc;
196 zwc->customMem = customMem;
197
198 return zwc;
199 }
200
201
ZWRAP_initializeCStream(ZWRAP_CCtx * zwc,const void * dict,size_t dictSize,unsigned long long pledgedSrcSize)202 static int ZWRAP_initializeCStream(ZWRAP_CCtx* zwc, const void* dict, size_t dictSize, unsigned long long pledgedSrcSize)
203 {
204 LOG_WRAPPERC("- ZWRAP_initializeCStream=%p\n", zwc);
205 if (zwc == NULL || zwc->zbc == NULL) return Z_STREAM_ERROR;
206
207 if (!pledgedSrcSize) pledgedSrcSize = zwc->pledgedSrcSize;
208 { unsigned initErr = 0;
209 ZSTD_parameters const params = ZSTD_getParams(zwc->compressionLevel, pledgedSrcSize, dictSize);
210 ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams();
211 if (!cctxParams) return Z_STREAM_ERROR;
212 LOG_WRAPPERC("pledgedSrcSize=%d windowLog=%d chainLog=%d hashLog=%d searchLog=%d minMatch=%d strategy=%d\n",
213 (int)pledgedSrcSize, params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.minMatch, params.cParams.strategy);
214
215 initErr |= ZSTD_isError(ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only));
216 initErr |= ZSTD_isError(ZSTD_CCtxParams_init_advanced(cctxParams, params));
217 initErr |= ZSTD_isError(ZSTD_CCtx_setParametersUsingCCtxParams(zwc->zbc, cctxParams));
218 initErr |= ZSTD_isError(ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, pledgedSrcSize));
219 initErr |= ZSTD_isError(ZSTD_CCtx_loadDictionary(zwc->zbc, dict, dictSize));
220
221 ZSTD_freeCCtxParams(cctxParams);
222 if (initErr) return Z_STREAM_ERROR;
223 }
224
225 return Z_OK;
226 }
227
228
ZWRAPC_finishWithError(ZWRAP_CCtx * zwc,z_streamp strm,int error)229 static int ZWRAPC_finishWithError(ZWRAP_CCtx* zwc, z_streamp strm, int error)
230 {
231 LOG_WRAPPERC("- ZWRAPC_finishWithError=%d\n", error);
232 if (zwc) ZWRAP_freeCCtx(zwc);
233 if (strm) strm->state = NULL;
234 return (error) ? error : Z_STREAM_ERROR;
235 }
236
237
ZWRAPC_finishWithErrorMsg(z_streamp strm,char * message)238 static int ZWRAPC_finishWithErrorMsg(z_streamp strm, char* message)
239 {
240 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
241 strm->msg = message;
242 if (zwc == NULL) return Z_STREAM_ERROR;
243
244 return ZWRAPC_finishWithError(zwc, strm, 0);
245 }
246
247
ZWRAP_setPledgedSrcSize(z_streamp strm,unsigned long long pledgedSrcSize)248 int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize)
249 {
250 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
251 if (zwc == NULL) return Z_STREAM_ERROR;
252
253 zwc->pledgedSrcSize = pledgedSrcSize;
254 zwc->comprState = ZWRAP_useInit;
255 return Z_OK;
256 }
257
convert_into_sis(void * ptr)258 static struct internal_state* convert_into_sis(void* ptr)
259 {
260 return (struct internal_state*) ptr;
261 }
262
z_deflateInit_(z_streamp strm,int level,const char * version,int stream_size)263 ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level,
264 const char *version, int stream_size))
265 {
266 ZWRAP_CCtx* zwc;
267
268 LOG_WRAPPERC("- deflateInit level=%d\n", level);
269 if (!g_ZWRAP_useZSTDcompression) {
270 return deflateInit_((strm), (level), version, stream_size);
271 }
272
273 zwc = ZWRAP_createCCtx(strm);
274 if (zwc == NULL) return Z_MEM_ERROR;
275
276 if (level == Z_DEFAULT_COMPRESSION)
277 level = ZWRAP_DEFAULT_CLEVEL;
278
279 zwc->streamEnd = 0;
280 zwc->totalInBytes = 0;
281 zwc->compressionLevel = level;
282 strm->state = convert_into_sis(zwc); /* use state which in not used by user */
283 strm->total_in = 0;
284 strm->total_out = 0;
285 strm->adler = 0;
286 return Z_OK;
287 }
288
289
z_deflateInit2_(z_streamp strm,int level,int method,int windowBits,int memLevel,int strategy,const char * version,int stream_size)290 ZEXTERN int ZEXPORT z_deflateInit2_ OF((z_streamp strm, int level, int method,
291 int windowBits, int memLevel,
292 int strategy, const char *version,
293 int stream_size))
294 {
295 if (!g_ZWRAP_useZSTDcompression)
296 return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, version, stream_size);
297
298 return z_deflateInit_ (strm, level, version, stream_size);
299 }
300
301
ZWRAP_deflateReset_keepDict(z_streamp strm)302 int ZWRAP_deflateReset_keepDict(z_streamp strm)
303 {
304 LOG_WRAPPERC("- ZWRAP_deflateReset_keepDict\n");
305 if (!g_ZWRAP_useZSTDcompression)
306 return deflateReset(strm);
307
308 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
309 if (zwc) {
310 zwc->streamEnd = 0;
311 zwc->totalInBytes = 0;
312 }
313 }
314
315 strm->total_in = 0;
316 strm->total_out = 0;
317 strm->adler = 0;
318 return Z_OK;
319 }
320
321
z_deflateReset(z_streamp strm)322 ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm))
323 {
324 LOG_WRAPPERC("- deflateReset\n");
325 if (!g_ZWRAP_useZSTDcompression)
326 return deflateReset(strm);
327
328 ZWRAP_deflateReset_keepDict(strm);
329
330 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
331 if (zwc) zwc->comprState = ZWRAP_useInit;
332 }
333 return Z_OK;
334 }
335
336
z_deflateSetDictionary(z_streamp strm,const Bytef * dictionary,uInt dictLength)337 ZEXTERN int ZEXPORT z_deflateSetDictionary OF((z_streamp strm,
338 const Bytef *dictionary,
339 uInt dictLength))
340 {
341 if (!g_ZWRAP_useZSTDcompression) {
342 LOG_WRAPPERC("- deflateSetDictionary\n");
343 return deflateSetDictionary(strm, dictionary, dictLength);
344 }
345
346 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
347 LOG_WRAPPERC("- deflateSetDictionary level=%d\n", (int)zwc->compressionLevel);
348 if (!zwc) return Z_STREAM_ERROR;
349 if (zwc->zbc == NULL) {
350 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
351 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0);
352 }
353 { int res = ZWRAP_initializeCStream(zwc, dictionary, dictLength, ZSTD_CONTENTSIZE_UNKNOWN);
354 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); }
355 zwc->comprState = ZWRAP_useReset;
356 }
357
358 return Z_OK;
359 }
360
361
z_deflate(z_streamp strm,int flush)362 ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush))
363 {
364 ZWRAP_CCtx* zwc;
365
366 if (!g_ZWRAP_useZSTDcompression) {
367 LOG_WRAPPERC("- deflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
368 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
369 return deflate(strm, flush);
370 }
371
372 zwc = (ZWRAP_CCtx*) strm->state;
373 if (zwc == NULL) { LOG_WRAPPERC("zwc == NULL\n"); return Z_STREAM_ERROR; }
374
375 if (zwc->zbc == NULL) {
376 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
377 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0);
378 { int const initErr = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
379 if (initErr != Z_OK) return ZWRAPC_finishWithError(zwc, strm, initErr); }
380 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
381 } else {
382 if (zwc->totalInBytes == 0) {
383 if (zwc->comprState == ZWRAP_useReset) {
384 size_t resetErr = ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only);
385 if (ZSTD_isError(resetErr)) {
386 LOG_WRAPPERC("ERROR: ZSTD_CCtx_reset errorCode=%s\n",
387 ZSTD_getErrorName(resetErr));
388 return ZWRAPC_finishWithError(zwc, strm, 0);
389 }
390 resetErr = ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, (flush == Z_FINISH) ? strm->avail_in : zwc->pledgedSrcSize);
391 if (ZSTD_isError(resetErr)) {
392 LOG_WRAPPERC("ERROR: ZSTD_CCtx_setPledgedSrcSize errorCode=%s\n",
393 ZSTD_getErrorName(resetErr));
394 return ZWRAPC_finishWithError(zwc, strm, 0);
395 }
396 } else {
397 int const res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
398 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res);
399 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
400 }
401 } /* (zwc->totalInBytes == 0) */
402 } /* ! (zwc->zbc == NULL) */
403
404 LOG_WRAPPERC("- deflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
405 if (strm->avail_in > 0) {
406 zwc->inBuffer.src = strm->next_in;
407 zwc->inBuffer.size = strm->avail_in;
408 zwc->inBuffer.pos = 0;
409 zwc->outBuffer.dst = strm->next_out;
410 zwc->outBuffer.size = strm->avail_out;
411 zwc->outBuffer.pos = 0;
412 { size_t const cErr = ZSTD_compressStream(zwc->zbc, &zwc->outBuffer, &zwc->inBuffer);
413 LOG_WRAPPERC("deflate ZSTD_compressStream srcSize=%d dstCapacity=%d\n", (int)zwc->inBuffer.size, (int)zwc->outBuffer.size);
414 if (ZSTD_isError(cErr)) return ZWRAPC_finishWithError(zwc, strm, 0);
415 }
416 strm->next_out += zwc->outBuffer.pos;
417 strm->total_out += zwc->outBuffer.pos;
418 strm->avail_out -= zwc->outBuffer.pos;
419 strm->total_in += zwc->inBuffer.pos;
420 zwc->totalInBytes += zwc->inBuffer.pos;
421 strm->next_in += zwc->inBuffer.pos;
422 strm->avail_in -= zwc->inBuffer.pos;
423 }
424
425 if (flush == Z_FULL_FLUSH
426 #if ZLIB_VERNUM >= 0x1240
427 || flush == Z_TREES
428 #endif
429 || flush == Z_BLOCK)
430 return ZWRAPC_finishWithErrorMsg(strm, "Z_FULL_FLUSH, Z_BLOCK and Z_TREES are not supported!");
431
432 if (flush == Z_FINISH) {
433 size_t bytesLeft;
434 if (zwc->streamEnd) return Z_STREAM_END;
435 zwc->outBuffer.dst = strm->next_out;
436 zwc->outBuffer.size = strm->avail_out;
437 zwc->outBuffer.pos = 0;
438 bytesLeft = ZSTD_endStream(zwc->zbc, &zwc->outBuffer);
439 LOG_WRAPPERC("deflate ZSTD_endStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft);
440 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0);
441 strm->next_out += zwc->outBuffer.pos;
442 strm->total_out += zwc->outBuffer.pos;
443 strm->avail_out -= zwc->outBuffer.pos;
444 if (bytesLeft == 0) {
445 zwc->streamEnd = 1;
446 LOG_WRAPPERC("Z_STREAM_END2 strm->total_in=%d strm->avail_out=%d strm->total_out=%d\n",
447 (int)strm->total_in, (int)strm->avail_out, (int)strm->total_out);
448 return Z_STREAM_END;
449 } }
450 else
451 if (flush == Z_SYNC_FLUSH || flush == Z_PARTIAL_FLUSH) {
452 size_t bytesLeft;
453 zwc->outBuffer.dst = strm->next_out;
454 zwc->outBuffer.size = strm->avail_out;
455 zwc->outBuffer.pos = 0;
456 bytesLeft = ZSTD_flushStream(zwc->zbc, &zwc->outBuffer);
457 LOG_WRAPPERC("deflate ZSTD_flushStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft);
458 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0);
459 strm->next_out += zwc->outBuffer.pos;
460 strm->total_out += zwc->outBuffer.pos;
461 strm->avail_out -= zwc->outBuffer.pos;
462 }
463 LOG_WRAPPERC("- deflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
464 return Z_OK;
465 }
466
467
z_deflateEnd(z_streamp strm)468 ZEXTERN int ZEXPORT z_deflateEnd OF((z_streamp strm))
469 {
470 if (!g_ZWRAP_useZSTDcompression) {
471 LOG_WRAPPERC("- deflateEnd\n");
472 return deflateEnd(strm);
473 }
474 LOG_WRAPPERC("- deflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out));
475 { size_t errorCode;
476 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
477 if (zwc == NULL) return Z_OK; /* structures are already freed */
478 strm->state = NULL;
479 errorCode = ZWRAP_freeCCtx(zwc);
480 if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR;
481 }
482 return Z_OK;
483 }
484
485
z_deflateBound(z_streamp strm,uLong sourceLen)486 ZEXTERN uLong ZEXPORT z_deflateBound OF((z_streamp strm,
487 uLong sourceLen))
488 {
489 if (!g_ZWRAP_useZSTDcompression)
490 return deflateBound(strm, sourceLen);
491
492 return ZSTD_compressBound(sourceLen);
493 }
494
495
z_deflateParams(z_streamp strm,int level,int strategy)496 ZEXTERN int ZEXPORT z_deflateParams OF((z_streamp strm,
497 int level,
498 int strategy))
499 {
500 if (!g_ZWRAP_useZSTDcompression) {
501 LOG_WRAPPERC("- deflateParams level=%d strategy=%d\n", level, strategy);
502 return deflateParams(strm, level, strategy);
503 }
504
505 return Z_OK;
506 }
507
508
509
510
511
512 /* === Decompression === */
513
514 typedef enum { ZWRAP_ZLIB_STREAM, ZWRAP_ZSTD_STREAM, ZWRAP_UNKNOWN_STREAM } ZWRAP_stream_type;
515
516 typedef struct {
517 ZSTD_DStream* zbd;
518 char headerBuf[16]; /* must be >= ZSTD_frameHeaderSize_min */
519 int errorCount;
520 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
521 ZWRAP_state_t decompState;
522 ZSTD_inBuffer inBuffer;
523 ZSTD_outBuffer outBuffer;
524
525 /* zlib params */
526 int stream_size;
527 char *version;
528 int windowBits;
529 ZSTD_customMem customMem;
530 z_stream allocFunc; /* just to copy zalloc, zfree, opaque */
531 } ZWRAP_DCtx;
532
533
ZWRAP_initDCtx(ZWRAP_DCtx * zwd)534 static void ZWRAP_initDCtx(ZWRAP_DCtx* zwd)
535 {
536 zwd->errorCount = 0;
537 zwd->outBuffer.pos = 0;
538 zwd->outBuffer.size = 0;
539 }
540
ZWRAP_createDCtx(z_streamp strm)541 static ZWRAP_DCtx* ZWRAP_createDCtx(z_streamp strm)
542 {
543 ZWRAP_DCtx* zwd;
544 ZSTD_customMem customMem = { NULL, NULL, NULL };
545
546 if (strm->zalloc && strm->zfree) {
547 customMem.customAlloc = ZWRAP_allocFunction;
548 customMem.customFree = ZWRAP_freeFunction;
549 }
550 customMem.opaque = strm;
551
552 zwd = (ZWRAP_DCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_DCtx), customMem);
553 if (zwd == NULL) return NULL;
554 zwd->allocFunc = *strm;
555 customMem.opaque = &zwd->allocFunc;
556 zwd->customMem = customMem;
557
558 ZWRAP_initDCtx(zwd);
559 return zwd;
560 }
561
ZWRAP_freeDCtx(ZWRAP_DCtx * zwd)562 static size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd)
563 {
564 if (zwd==NULL) return 0; /* support free on null */
565 ZSTD_freeDStream(zwd->zbd);
566 ZWRAP_customFree(zwd->version, zwd->customMem);
567 ZWRAP_customFree(zwd, zwd->customMem);
568 return 0;
569 }
570
571
ZWRAP_isUsingZSTDdecompression(z_streamp strm)572 int ZWRAP_isUsingZSTDdecompression(z_streamp strm)
573 {
574 if (strm == NULL) return 0;
575 return (strm->reserved == ZWRAP_ZSTD_STREAM);
576 }
577
578
ZWRAPD_finishWithError(ZWRAP_DCtx * zwd,z_streamp strm,int error)579 static int ZWRAPD_finishWithError(ZWRAP_DCtx* zwd, z_streamp strm, int error)
580 {
581 LOG_WRAPPERD("- ZWRAPD_finishWithError=%d\n", error);
582 ZWRAP_freeDCtx(zwd);
583 strm->state = NULL;
584 return (error) ? error : Z_STREAM_ERROR;
585 }
586
ZWRAPD_finishWithErrorMsg(z_streamp strm,char * message)587 static int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message)
588 {
589 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
590 strm->msg = message;
591 if (zwd == NULL) return Z_STREAM_ERROR;
592
593 return ZWRAPD_finishWithError(zwd, strm, 0);
594 }
595
596
z_inflateInit_(z_streamp strm,const char * version,int stream_size)597 ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm,
598 const char* version, int stream_size))
599 {
600 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) {
601 strm->reserved = ZWRAP_ZLIB_STREAM;
602 return inflateInit(strm);
603 }
604
605 { ZWRAP_DCtx* const zwd = ZWRAP_createDCtx(strm);
606 LOG_WRAPPERD("- inflateInit\n");
607 if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
608
609 zwd->version = (char*)ZWRAP_customMalloc(strlen(version)+1, zwd->customMem);
610 if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
611 strcpy(zwd->version, version);
612
613 zwd->stream_size = stream_size;
614 zwd->totalInBytes = 0;
615 strm->state = convert_into_sis(zwd);
616 strm->total_in = 0;
617 strm->total_out = 0;
618 strm->reserved = ZWRAP_UNKNOWN_STREAM;
619 strm->adler = 0;
620 }
621
622 return Z_OK;
623 }
624
625
z_inflateInit2_(z_streamp strm,int windowBits,const char * version,int stream_size)626 ZEXTERN int ZEXPORT z_inflateInit2_ OF((z_streamp strm, int windowBits,
627 const char *version, int stream_size))
628 {
629 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) {
630 return inflateInit2_(strm, windowBits, version, stream_size);
631 }
632
633 { int const ret = z_inflateInit_ (strm, version, stream_size);
634 LOG_WRAPPERD("- inflateInit2 windowBits=%d\n", windowBits);
635 if (ret == Z_OK) {
636 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state;
637 if (zwd == NULL) return Z_STREAM_ERROR;
638 zwd->windowBits = windowBits;
639 }
640 return ret;
641 }
642 }
643
ZWRAP_inflateReset_keepDict(z_streamp strm)644 int ZWRAP_inflateReset_keepDict(z_streamp strm)
645 {
646 LOG_WRAPPERD("- ZWRAP_inflateReset_keepDict\n");
647 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
648 return inflateReset(strm);
649
650 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
651 if (zwd == NULL) return Z_STREAM_ERROR;
652 ZWRAP_initDCtx(zwd);
653 zwd->decompState = ZWRAP_useReset;
654 zwd->totalInBytes = 0;
655 }
656
657 strm->total_in = 0;
658 strm->total_out = 0;
659 return Z_OK;
660 }
661
662
z_inflateReset(z_streamp strm)663 ZEXTERN int ZEXPORT z_inflateReset OF((z_streamp strm))
664 {
665 LOG_WRAPPERD("- inflateReset\n");
666 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
667 return inflateReset(strm);
668
669 { int const ret = ZWRAP_inflateReset_keepDict(strm);
670 if (ret != Z_OK) return ret; }
671
672 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
673 if (zwd == NULL) return Z_STREAM_ERROR;
674 zwd->decompState = ZWRAP_useInit; }
675
676 return Z_OK;
677 }
678
679
680 #if ZLIB_VERNUM >= 0x1240
z_inflateReset2(z_streamp strm,int windowBits)681 ZEXTERN int ZEXPORT z_inflateReset2 OF((z_streamp strm,
682 int windowBits))
683 {
684 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
685 return inflateReset2(strm, windowBits);
686
687 { int const ret = z_inflateReset (strm);
688 if (ret == Z_OK) {
689 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state;
690 if (zwd == NULL) return Z_STREAM_ERROR;
691 zwd->windowBits = windowBits;
692 }
693 return ret;
694 }
695 }
696 #endif
697
698
z_inflateSetDictionary(z_streamp strm,const Bytef * dictionary,uInt dictLength)699 ZEXTERN int ZEXPORT z_inflateSetDictionary OF((z_streamp strm,
700 const Bytef *dictionary,
701 uInt dictLength))
702 {
703 LOG_WRAPPERD("- inflateSetDictionary\n");
704 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
705 return inflateSetDictionary(strm, dictionary, dictLength);
706
707 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
708 if (zwd == NULL || zwd->zbd == NULL) return Z_STREAM_ERROR;
709 { size_t const initErr = ZSTD_initDStream_usingDict(zwd->zbd, dictionary, dictLength);
710 if (ZSTD_isError(initErr)) return ZWRAPD_finishWithError(zwd, strm, 0); }
711 zwd->decompState = ZWRAP_useReset;
712
713 if (zwd->totalInBytes == ZSTD_HEADERSIZE) {
714 zwd->inBuffer.src = zwd->headerBuf;
715 zwd->inBuffer.size = zwd->totalInBytes;
716 zwd->inBuffer.pos = 0;
717 zwd->outBuffer.dst = strm->next_out;
718 zwd->outBuffer.size = 0;
719 zwd->outBuffer.pos = 0;
720 { size_t const errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
721 LOG_WRAPPERD("inflateSetDictionary ZSTD_decompressStream errorCode=%d srcSize=%d dstCapacity=%d\n",
722 (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size);
723 if (zwd->inBuffer.pos < zwd->outBuffer.size || ZSTD_isError(errorCode)) {
724 LOG_WRAPPERD("ERROR: ZSTD_decompressStream %s\n",
725 ZSTD_getErrorName(errorCode));
726 return ZWRAPD_finishWithError(zwd, strm, 0);
727 } } } }
728
729 return Z_OK;
730 }
731
732
z_inflate(z_streamp strm,int flush)733 ZEXTERN int ZEXPORT z_inflate OF((z_streamp strm, int flush))
734 {
735 ZWRAP_DCtx* zwd;
736
737 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) {
738 int const result = inflate(strm, flush);
739 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
740 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, result);
741 return result;
742 }
743
744 if (strm->avail_in <= 0) return Z_OK;
745
746 zwd = (ZWRAP_DCtx*) strm->state;
747 LOG_WRAPPERD("- inflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
748 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
749
750 if (zwd == NULL) return Z_STREAM_ERROR;
751 if (zwd->decompState == ZWRAP_streamEnd) return Z_STREAM_END;
752
753 if (zwd->totalInBytes < ZLIB_HEADERSIZE) {
754 if (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) {
755 if (ZWRAP_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) {
756 { int const initErr = (zwd->windowBits) ?
757 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
758 inflateInit_(strm, zwd->version, zwd->stream_size);
759 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
760 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
761 }
762
763 strm->reserved = ZWRAP_ZLIB_STREAM;
764 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
765 if (ZSTD_isError(freeErr)) goto error; }
766
767 { int const result = (flush == Z_INFLATE_SYNC) ?
768 inflateSync(strm) :
769 inflate(strm, flush);
770 LOG_WRAPPERD("- inflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
771 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res);
772 return result;
773 } }
774 } else { /* ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
775 size_t const srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - zwd->totalInBytes);
776 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
777 strm->total_in += srcSize;
778 zwd->totalInBytes += srcSize;
779 strm->next_in += srcSize;
780 strm->avail_in -= srcSize;
781 if (zwd->totalInBytes < ZLIB_HEADERSIZE) return Z_OK;
782
783 if (ZWRAP_readLE32(zwd->headerBuf) != ZSTD_MAGICNUMBER) {
784 z_stream strm2;
785 strm2.next_in = strm->next_in;
786 strm2.avail_in = strm->avail_in;
787 strm2.next_out = strm->next_out;
788 strm2.avail_out = strm->avail_out;
789
790 { int const initErr = (zwd->windowBits) ?
791 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
792 inflateInit_(strm, zwd->version, zwd->stream_size);
793 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
794 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
795 }
796
797 /* inflate header */
798 strm->next_in = (unsigned char*)zwd->headerBuf;
799 strm->avail_in = ZLIB_HEADERSIZE;
800 strm->avail_out = 0;
801 { int const dErr = inflate(strm, Z_NO_FLUSH);
802 LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n",
803 dErr, (int)strm->avail_in);
804 if (dErr != Z_OK)
805 return ZWRAPD_finishWithError(zwd, strm, dErr);
806 }
807 if (strm->avail_in > 0) goto error;
808
809 strm->next_in = strm2.next_in;
810 strm->avail_in = strm2.avail_in;
811 strm->next_out = strm2.next_out;
812 strm->avail_out = strm2.avail_out;
813
814 strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */
815 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
816 if (ZSTD_isError(freeErr)) goto error; }
817
818 { int const result = (flush == Z_INFLATE_SYNC) ?
819 inflateSync(strm) :
820 inflate(strm, flush);
821 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
822 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res);
823 return result;
824 } } } /* if ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
825 } /* (zwd->totalInBytes < ZLIB_HEADERSIZE) */
826
827 strm->reserved = ZWRAP_ZSTD_STREAM; /* mark as zstd steam */
828
829 if (flush == Z_INFLATE_SYNC) { strm->msg = "inflateSync is not supported!"; goto error; }
830
831 if (!zwd->zbd) {
832 zwd->zbd = ZSTD_createDStream_advanced(zwd->customMem);
833 if (zwd->zbd == NULL) { LOG_WRAPPERD("ERROR: ZSTD_createDStream_advanced\n"); goto error; }
834 zwd->decompState = ZWRAP_useInit;
835 }
836
837 if (zwd->totalInBytes < ZSTD_HEADERSIZE) {
838 if (zwd->totalInBytes == 0 && strm->avail_in >= ZSTD_HEADERSIZE) {
839 if (zwd->decompState == ZWRAP_useInit) {
840 size_t const initErr = ZSTD_initDStream(zwd->zbd);
841 if (ZSTD_isError(initErr)) {
842 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
843 ZSTD_getErrorName(initErr));
844 goto error;
845 }
846 } else {
847 size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only);
848 if (ZSTD_isError(resetErr)) goto error;
849 }
850 } else {
851 size_t const srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - zwd->totalInBytes);
852 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
853 strm->total_in += srcSize;
854 zwd->totalInBytes += srcSize;
855 strm->next_in += srcSize;
856 strm->avail_in -= srcSize;
857 if (zwd->totalInBytes < ZSTD_HEADERSIZE) return Z_OK;
858
859 if (zwd->decompState == ZWRAP_useInit) {
860 size_t const initErr = ZSTD_initDStream(zwd->zbd);
861 if (ZSTD_isError(initErr)) {
862 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
863 ZSTD_getErrorName(initErr));
864 goto error;
865 }
866 } else {
867 size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only);
868 if (ZSTD_isError(resetErr)) goto error;
869 }
870
871 zwd->inBuffer.src = zwd->headerBuf;
872 zwd->inBuffer.size = ZSTD_HEADERSIZE;
873 zwd->inBuffer.pos = 0;
874 zwd->outBuffer.dst = strm->next_out;
875 zwd->outBuffer.size = 0;
876 zwd->outBuffer.pos = 0;
877 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
878 LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n",
879 (int)dErr, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size);
880 if (ZSTD_isError(dErr)) {
881 LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(dErr));
882 goto error;
883 } }
884 if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */
885 }
886 } /* (zwd->totalInBytes < ZSTD_HEADERSIZE) */
887
888 zwd->inBuffer.src = strm->next_in;
889 zwd->inBuffer.size = strm->avail_in;
890 zwd->inBuffer.pos = 0;
891 zwd->outBuffer.dst = strm->next_out;
892 zwd->outBuffer.size = strm->avail_out;
893 zwd->outBuffer.pos = 0;
894 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
895 LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n",
896 (int)dErr, (int)strm->avail_in, (int)strm->avail_out);
897 if (ZSTD_isError(dErr)) {
898 zwd->errorCount++;
899 LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n",
900 ZSTD_getErrorName(dErr), zwd->errorCount);
901 if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error;
902 }
903 LOG_WRAPPERD("inflate inBuffer.pos=%d inBuffer.size=%d outBuffer.pos=%d outBuffer.size=%d o\n",
904 (int)zwd->inBuffer.pos, (int)zwd->inBuffer.size, (int)zwd->outBuffer.pos, (int)zwd->outBuffer.size);
905 strm->next_out += zwd->outBuffer.pos;
906 strm->total_out += zwd->outBuffer.pos;
907 strm->avail_out -= zwd->outBuffer.pos;
908 strm->total_in += zwd->inBuffer.pos;
909 zwd->totalInBytes += zwd->inBuffer.pos;
910 strm->next_in += zwd->inBuffer.pos;
911 strm->avail_in -= zwd->inBuffer.pos;
912 if (dErr == 0) {
913 LOG_WRAPPERD("inflate Z_STREAM_END1 avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
914 (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
915 zwd->decompState = ZWRAP_streamEnd;
916 return Z_STREAM_END;
917 }
918 } /* dErr lifetime */
919
920 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
921 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, Z_OK);
922 return Z_OK;
923
924 error:
925 return ZWRAPD_finishWithError(zwd, strm, 0);
926 }
927
928
z_inflateEnd(z_streamp strm)929 ZEXTERN int ZEXPORT z_inflateEnd OF((z_streamp strm))
930 {
931 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
932 return inflateEnd(strm);
933
934 LOG_WRAPPERD("- inflateEnd total_in=%d total_out=%d\n",
935 (int)(strm->total_in), (int)(strm->total_out));
936 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
937 if (zwd == NULL) return Z_OK; /* structures are already freed */
938 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
939 if (ZSTD_isError(freeErr)) return Z_STREAM_ERROR; }
940 strm->state = NULL;
941 }
942 return Z_OK;
943 }
944
945
z_inflateSync(z_streamp strm)946 ZEXTERN int ZEXPORT z_inflateSync OF((z_streamp strm))
947 {
948 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) {
949 return inflateSync(strm);
950 }
951
952 return z_inflate(strm, Z_INFLATE_SYNC);
953 }
954
955
956
957 /* Advanced compression functions */
z_deflateCopy(z_streamp dest,z_streamp source)958 ZEXTERN int ZEXPORT z_deflateCopy OF((z_streamp dest,
959 z_streamp source))
960 {
961 if (!g_ZWRAP_useZSTDcompression)
962 return deflateCopy(dest, source);
963 return ZWRAPC_finishWithErrorMsg(source, "deflateCopy is not supported!");
964 }
965
966
z_deflateTune(z_streamp strm,int good_length,int max_lazy,int nice_length,int max_chain)967 ZEXTERN int ZEXPORT z_deflateTune OF((z_streamp strm,
968 int good_length,
969 int max_lazy,
970 int nice_length,
971 int max_chain))
972 {
973 if (!g_ZWRAP_useZSTDcompression)
974 return deflateTune(strm, good_length, max_lazy, nice_length, max_chain);
975 return ZWRAPC_finishWithErrorMsg(strm, "deflateTune is not supported!");
976 }
977
978
979 #if ZLIB_VERNUM >= 0x1260
z_deflatePending(z_streamp strm,unsigned * pending,int * bits)980 ZEXTERN int ZEXPORT z_deflatePending OF((z_streamp strm,
981 unsigned *pending,
982 int *bits))
983 {
984 if (!g_ZWRAP_useZSTDcompression)
985 return deflatePending(strm, pending, bits);
986 return ZWRAPC_finishWithErrorMsg(strm, "deflatePending is not supported!");
987 }
988 #endif
989
990
z_deflatePrime(z_streamp strm,int bits,int value)991 ZEXTERN int ZEXPORT z_deflatePrime OF((z_streamp strm,
992 int bits,
993 int value))
994 {
995 if (!g_ZWRAP_useZSTDcompression)
996 return deflatePrime(strm, bits, value);
997 return ZWRAPC_finishWithErrorMsg(strm, "deflatePrime is not supported!");
998 }
999
1000
z_deflateSetHeader(z_streamp strm,gz_headerp head)1001 ZEXTERN int ZEXPORT z_deflateSetHeader OF((z_streamp strm,
1002 gz_headerp head))
1003 {
1004 if (!g_ZWRAP_useZSTDcompression)
1005 return deflateSetHeader(strm, head);
1006 return ZWRAPC_finishWithErrorMsg(strm, "deflateSetHeader is not supported!");
1007 }
1008
1009
1010
1011
1012 /* Advanced decompression functions */
1013 #if ZLIB_VERNUM >= 0x1280
z_inflateGetDictionary(z_streamp strm,Bytef * dictionary,uInt * dictLength)1014 ZEXTERN int ZEXPORT z_inflateGetDictionary OF((z_streamp strm,
1015 Bytef *dictionary,
1016 uInt *dictLength))
1017 {
1018 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1019 return inflateGetDictionary(strm, dictionary, dictLength);
1020 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetDictionary is not supported!");
1021 }
1022 #endif
1023
1024
z_inflateCopy(z_streamp dest,z_streamp source)1025 ZEXTERN int ZEXPORT z_inflateCopy OF((z_streamp dest,
1026 z_streamp source))
1027 {
1028 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !source->reserved)
1029 return inflateCopy(dest, source);
1030 return ZWRAPD_finishWithErrorMsg(source, "inflateCopy is not supported!");
1031 }
1032
1033
1034 #if ZLIB_VERNUM >= 0x1240
z_inflateMark(z_streamp strm)1035 ZEXTERN long ZEXPORT z_inflateMark OF((z_streamp strm))
1036 {
1037 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1038 return inflateMark(strm);
1039 return ZWRAPD_finishWithErrorMsg(strm, "inflateMark is not supported!");
1040 }
1041 #endif
1042
1043
z_inflatePrime(z_streamp strm,int bits,int value)1044 ZEXTERN int ZEXPORT z_inflatePrime OF((z_streamp strm,
1045 int bits,
1046 int value))
1047 {
1048 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1049 return inflatePrime(strm, bits, value);
1050 return ZWRAPD_finishWithErrorMsg(strm, "inflatePrime is not supported!");
1051 }
1052
1053
z_inflateGetHeader(z_streamp strm,gz_headerp head)1054 ZEXTERN int ZEXPORT z_inflateGetHeader OF((z_streamp strm,
1055 gz_headerp head))
1056 {
1057 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1058 return inflateGetHeader(strm, head);
1059 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetHeader is not supported!");
1060 }
1061
1062
z_inflateBackInit_(z_streamp strm,int windowBits,unsigned char FAR * window,const char * version,int stream_size)1063 ZEXTERN int ZEXPORT z_inflateBackInit_ OF((z_streamp strm, int windowBits,
1064 unsigned char FAR *window,
1065 const char *version,
1066 int stream_size))
1067 {
1068 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1069 return inflateBackInit_(strm, windowBits, window, version, stream_size);
1070 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackInit is not supported!");
1071 }
1072
1073
z_inflateBack(z_streamp strm,in_func in,void FAR * in_desc,out_func out,void FAR * out_desc)1074 ZEXTERN int ZEXPORT z_inflateBack OF((z_streamp strm,
1075 in_func in, void FAR *in_desc,
1076 out_func out, void FAR *out_desc))
1077 {
1078 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1079 return inflateBack(strm, in, in_desc, out, out_desc);
1080 return ZWRAPD_finishWithErrorMsg(strm, "inflateBack is not supported!");
1081 }
1082
1083
z_inflateBackEnd(z_streamp strm)1084 ZEXTERN int ZEXPORT z_inflateBackEnd OF((z_streamp strm))
1085 {
1086 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1087 return inflateBackEnd(strm);
1088 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackEnd is not supported!");
1089 }
1090
1091
z_zlibCompileFlags(void)1092 ZEXTERN uLong ZEXPORT z_zlibCompileFlags OF((void)) { return zlibCompileFlags(); }
1093
1094
1095
1096 /* === utility functions === */
1097 #ifndef Z_SOLO
1098
z_compress(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen)1099 ZEXTERN int ZEXPORT z_compress OF((Bytef *dest, uLongf *destLen,
1100 const Bytef *source, uLong sourceLen))
1101 {
1102 if (!g_ZWRAP_useZSTDcompression)
1103 return compress(dest, destLen, source, sourceLen);
1104
1105 { size_t dstCapacity = *destLen;
1106 size_t const cSize = ZSTD_compress(dest, dstCapacity,
1107 source, sourceLen,
1108 ZWRAP_DEFAULT_CLEVEL);
1109 LOG_WRAPPERD("z_compress sourceLen=%d dstCapacity=%d\n",
1110 (int)sourceLen, (int)dstCapacity);
1111 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR;
1112 *destLen = cSize;
1113 }
1114 return Z_OK;
1115 }
1116
1117
z_compress2(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen,int level)1118 ZEXTERN int ZEXPORT z_compress2 OF((Bytef *dest, uLongf *destLen,
1119 const Bytef *source, uLong sourceLen,
1120 int level))
1121 {
1122 if (!g_ZWRAP_useZSTDcompression)
1123 return compress2(dest, destLen, source, sourceLen, level);
1124
1125 { size_t dstCapacity = *destLen;
1126 size_t const cSize = ZSTD_compress(dest, dstCapacity, source, sourceLen, level);
1127 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR;
1128 *destLen = cSize;
1129 }
1130 return Z_OK;
1131 }
1132
1133
z_compressBound(uLong sourceLen)1134 ZEXTERN uLong ZEXPORT z_compressBound OF((uLong sourceLen))
1135 {
1136 if (!g_ZWRAP_useZSTDcompression)
1137 return compressBound(sourceLen);
1138
1139 return ZSTD_compressBound(sourceLen);
1140 }
1141
1142
z_uncompress(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen)1143 ZEXTERN int ZEXPORT z_uncompress OF((Bytef *dest, uLongf *destLen,
1144 const Bytef *source, uLong sourceLen))
1145 {
1146 if (!ZSTD_isFrame(source, sourceLen))
1147 return uncompress(dest, destLen, source, sourceLen);
1148
1149 { size_t dstCapacity = *destLen;
1150 size_t const dSize = ZSTD_decompress(dest, dstCapacity, source, sourceLen);
1151 if (ZSTD_isError(dSize)) return Z_STREAM_ERROR;
1152 *destLen = dSize;
1153 }
1154 return Z_OK;
1155 }
1156
1157 #endif /* !Z_SOLO */
1158
1159
1160 /* checksum functions */
1161
z_adler32(uLong adler,const Bytef * buf,uInt len)1162 ZEXTERN uLong ZEXPORT z_adler32 OF((uLong adler, const Bytef *buf, uInt len))
1163 {
1164 return adler32(adler, buf, len);
1165 }
1166
z_crc32(uLong crc,const Bytef * buf,uInt len)1167 ZEXTERN uLong ZEXPORT z_crc32 OF((uLong crc, const Bytef *buf, uInt len))
1168 {
1169 return crc32(crc, buf, len);
1170 }
1171
1172
1173 #if ZLIB_VERNUM >= 0x12B0
z_adler32_z(uLong adler,const Bytef * buf,z_size_t len)1174 ZEXTERN uLong ZEXPORT z_adler32_z OF((uLong adler, const Bytef *buf, z_size_t len))
1175 {
1176 return adler32_z(adler, buf, len);
1177 }
1178
z_crc32_z(uLong crc,const Bytef * buf,z_size_t len)1179 ZEXTERN uLong ZEXPORT z_crc32_z OF((uLong crc, const Bytef *buf, z_size_t len))
1180 {
1181 return crc32_z(crc, buf, len);
1182 }
1183 #endif
1184
1185
1186 #if ZLIB_VERNUM >= 0x1270
z_get_crc_table(void)1187 ZEXTERN const z_crc_t FAR * ZEXPORT z_get_crc_table OF((void))
1188 {
1189 return get_crc_table();
1190 }
1191 #endif
1192
1193 /* Error function */
z_zError(int err)1194 ZEXTERN const char * ZEXPORT z_zError OF((int err))
1195 {
1196 /* Just use zlib Error function */
1197 return zError(err);
1198 }
1199