1 /*
2 * Copyright (c) 2016-present, 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 #define NO_DUMMY_DECL
23 #define ZLIB_CONST
24 #include <zlib.h> /* without #define Z_PREFIX */
25 #include "zstd_zlibwrapper.h"
26 #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_isFrame, ZSTD_MAGICNUMBER */
27 #include "zstd.h"
28 #include "zstd_internal.h" /* ZSTD_malloc, ZSTD_free */
29
30
31 /* === Constants === */
32 #define Z_INFLATE_SYNC 8
33 #define ZLIB_HEADERSIZE 4
34 #define ZSTD_HEADERSIZE ZSTD_frameHeaderSize_min
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
46 /* === Wrapper === */
47 static int g_ZWRAP_useZSTDcompression = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */
48
ZWRAP_useZSTDcompression(int turn_on)49 void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; }
50
ZWRAP_isUsingZSTDcompression(void)51 int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; }
52
53
54
55 static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO;
56
ZWRAP_setDecompressionType(ZWRAP_decompress_type type)57 void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; };
58
ZWRAP_getDecompressionType(void)59 ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; }
60
61
62
zstdVersion(void)63 const char * zstdVersion(void) { return ZSTD_VERSION_STRING; }
64
z_zlibVersion(void)65 ZEXTERN const char * ZEXPORT z_zlibVersion OF((void)) { return zlibVersion(); }
66
67
68
ZWRAP_allocFunction(void * opaque,size_t size)69 static void* ZWRAP_allocFunction(void* opaque, size_t size)
70 {
71 z_streamp strm = (z_streamp) opaque;
72 void* address = strm->zalloc(strm->opaque, 1, (uInt)size);
73 /* LOG_WRAPPERC("ZWRAP alloc %p, %d \n", address, (int)size); */
74 return address;
75 }
76
ZWRAP_freeFunction(void * opaque,void * address)77 static void ZWRAP_freeFunction(void* opaque, void* address)
78 {
79 z_streamp strm = (z_streamp) opaque;
80 strm->zfree(strm->opaque, address);
81 /* if (address) LOG_WRAPPERC("ZWRAP free %p \n", address); */
82 }
83
84
85
86 /* === Compression === */
87 typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t;
88
89 typedef struct {
90 ZSTD_CStream* zbc;
91 int compressionLevel;
92 int streamEnd; /* a flag to signal the end of a stream */
93 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
94 ZSTD_customMem customMem;
95 z_stream allocFunc; /* copy of zalloc, zfree, opaque */
96 ZSTD_inBuffer inBuffer;
97 ZSTD_outBuffer outBuffer;
98 ZWRAP_state_t comprState;
99 unsigned long long pledgedSrcSize;
100 } ZWRAP_CCtx;
101
102 typedef ZWRAP_CCtx internal_state;
103
104
105
ZWRAP_freeCCtx(ZWRAP_CCtx * zwc)106 static size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc)
107 {
108 if (zwc==NULL) return 0; /* support free on NULL */
109 ZSTD_freeCStream(zwc->zbc);
110 ZSTD_free(zwc, zwc->customMem);
111 return 0;
112 }
113
114
ZWRAP_createCCtx(z_streamp strm)115 static ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm)
116 {
117 ZWRAP_CCtx* zwc;
118
119 if (strm->zalloc && strm->zfree) {
120 zwc = (ZWRAP_CCtx*)strm->zalloc(strm->opaque, 1, sizeof(ZWRAP_CCtx));
121 if (zwc==NULL) return NULL;
122 memset(zwc, 0, sizeof(ZWRAP_CCtx));
123 memcpy(&zwc->allocFunc, strm, sizeof(z_stream));
124 { ZSTD_customMem const ZWRAP_customMem = { ZWRAP_allocFunction, ZWRAP_freeFunction, &zwc->allocFunc };
125 zwc->customMem = ZWRAP_customMem; }
126 } else {
127 zwc = (ZWRAP_CCtx*)calloc(1, sizeof(*zwc));
128 if (zwc==NULL) return NULL;
129 }
130
131 return zwc;
132 }
133
134
ZWRAP_initializeCStream(ZWRAP_CCtx * zwc,const void * dict,size_t dictSize,unsigned long long pledgedSrcSize)135 static int ZWRAP_initializeCStream(ZWRAP_CCtx* zwc, const void* dict, size_t dictSize, unsigned long long pledgedSrcSize)
136 {
137 LOG_WRAPPERC("- ZWRAP_initializeCStream=%p\n", zwc);
138 if (zwc == NULL || zwc->zbc == NULL) return Z_STREAM_ERROR;
139
140 if (!pledgedSrcSize) pledgedSrcSize = zwc->pledgedSrcSize;
141 { ZSTD_parameters const params = ZSTD_getParams(zwc->compressionLevel, pledgedSrcSize, dictSize);
142 size_t initErr;
143 LOG_WRAPPERC("pledgedSrcSize=%d windowLog=%d chainLog=%d hashLog=%d searchLog=%d searchLength=%d strategy=%d\n",
144 (int)pledgedSrcSize, params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.searchLength, params.cParams.strategy);
145 initErr = ZSTD_initCStream_advanced(zwc->zbc, dict, dictSize, params, pledgedSrcSize);
146 if (ZSTD_isError(initErr)) return Z_STREAM_ERROR;
147 }
148
149 return Z_OK;
150 }
151
152
ZWRAPC_finishWithError(ZWRAP_CCtx * zwc,z_streamp strm,int error)153 static int ZWRAPC_finishWithError(ZWRAP_CCtx* zwc, z_streamp strm, int error)
154 {
155 LOG_WRAPPERC("- ZWRAPC_finishWithError=%d\n", error);
156 if (zwc) ZWRAP_freeCCtx(zwc);
157 if (strm) strm->state = NULL;
158 return (error) ? error : Z_STREAM_ERROR;
159 }
160
161
ZWRAPC_finishWithErrorMsg(z_streamp strm,char * message)162 static int ZWRAPC_finishWithErrorMsg(z_streamp strm, char* message)
163 {
164 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
165 strm->msg = message;
166 if (zwc == NULL) return Z_STREAM_ERROR;
167
168 return ZWRAPC_finishWithError(zwc, strm, 0);
169 }
170
171
ZWRAP_setPledgedSrcSize(z_streamp strm,unsigned long long pledgedSrcSize)172 int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize)
173 {
174 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
175 if (zwc == NULL) return Z_STREAM_ERROR;
176
177 zwc->pledgedSrcSize = pledgedSrcSize;
178 zwc->comprState = ZWRAP_useInit;
179 return Z_OK;
180 }
181
182
z_deflateInit_(z_streamp strm,int level,const char * version,int stream_size)183 ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level,
184 const char *version, int stream_size))
185 {
186 ZWRAP_CCtx* zwc;
187
188 LOG_WRAPPERC("- deflateInit level=%d\n", level);
189 if (!g_ZWRAP_useZSTDcompression) {
190 return deflateInit_((strm), (level), version, stream_size);
191 }
192
193 zwc = ZWRAP_createCCtx(strm);
194 if (zwc == NULL) return Z_MEM_ERROR;
195
196 if (level == Z_DEFAULT_COMPRESSION)
197 level = ZWRAP_DEFAULT_CLEVEL;
198
199 zwc->streamEnd = 0;
200 zwc->totalInBytes = 0;
201 zwc->compressionLevel = level;
202 strm->state = (struct internal_state*) zwc; /* use state which in not used by user */
203 strm->total_in = 0;
204 strm->total_out = 0;
205 strm->adler = 0;
206 return Z_OK;
207 }
208
209
z_deflateInit2_(z_streamp strm,int level,int method,int windowBits,int memLevel,int strategy,const char * version,int stream_size)210 ZEXTERN int ZEXPORT z_deflateInit2_ OF((z_streamp strm, int level, int method,
211 int windowBits, int memLevel,
212 int strategy, const char *version,
213 int stream_size))
214 {
215 if (!g_ZWRAP_useZSTDcompression)
216 return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, version, stream_size);
217
218 return z_deflateInit_ (strm, level, version, stream_size);
219 }
220
221
ZWRAP_deflateReset_keepDict(z_streamp strm)222 int ZWRAP_deflateReset_keepDict(z_streamp strm)
223 {
224 LOG_WRAPPERC("- ZWRAP_deflateReset_keepDict\n");
225 if (!g_ZWRAP_useZSTDcompression)
226 return deflateReset(strm);
227
228 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
229 if (zwc) {
230 zwc->streamEnd = 0;
231 zwc->totalInBytes = 0;
232 }
233 }
234
235 strm->total_in = 0;
236 strm->total_out = 0;
237 strm->adler = 0;
238 return Z_OK;
239 }
240
241
z_deflateReset(z_streamp strm)242 ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm))
243 {
244 LOG_WRAPPERC("- deflateReset\n");
245 if (!g_ZWRAP_useZSTDcompression)
246 return deflateReset(strm);
247
248 ZWRAP_deflateReset_keepDict(strm);
249
250 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
251 if (zwc) zwc->comprState = ZWRAP_useInit;
252 }
253 return Z_OK;
254 }
255
256
z_deflateSetDictionary(z_streamp strm,const Bytef * dictionary,uInt dictLength)257 ZEXTERN int ZEXPORT z_deflateSetDictionary OF((z_streamp strm,
258 const Bytef *dictionary,
259 uInt dictLength))
260 {
261 if (!g_ZWRAP_useZSTDcompression) {
262 LOG_WRAPPERC("- deflateSetDictionary\n");
263 return deflateSetDictionary(strm, dictionary, dictLength);
264 }
265
266 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
267 LOG_WRAPPERC("- deflateSetDictionary level=%d\n", (int)zwc->compressionLevel);
268 if (!zwc) return Z_STREAM_ERROR;
269 if (zwc->zbc == NULL) {
270 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
271 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0);
272 }
273 { int res = ZWRAP_initializeCStream(zwc, dictionary, dictLength, ZSTD_CONTENTSIZE_UNKNOWN);
274 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); }
275 zwc->comprState = ZWRAP_useReset;
276 }
277
278 return Z_OK;
279 }
280
281
z_deflate(z_streamp strm,int flush)282 ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush))
283 {
284 ZWRAP_CCtx* zwc;
285
286 if (!g_ZWRAP_useZSTDcompression) {
287 LOG_WRAPPERC("- deflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
288 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
289 return deflate(strm, flush);
290 }
291
292 zwc = (ZWRAP_CCtx*) strm->state;
293 if (zwc == NULL) { LOG_WRAPPERC("zwc == NULL\n"); return Z_STREAM_ERROR; }
294
295 if (zwc->zbc == NULL) {
296 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
297 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0);
298 { int const initErr = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
299 if (initErr != Z_OK) return ZWRAPC_finishWithError(zwc, strm, initErr); }
300 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
301 } else {
302 if (zwc->totalInBytes == 0) {
303 if (zwc->comprState == ZWRAP_useReset) {
304 size_t const resetErr = ZSTD_resetCStream(zwc->zbc, (flush == Z_FINISH) ? strm->avail_in : zwc->pledgedSrcSize);
305 if (ZSTD_isError(resetErr)) {
306 LOG_WRAPPERC("ERROR: ZSTD_resetCStream errorCode=%s\n",
307 ZSTD_getErrorName(resetErr));
308 return ZWRAPC_finishWithError(zwc, strm, 0);
309 }
310 } else {
311 int const res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
312 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res);
313 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
314 }
315 } /* (zwc->totalInBytes == 0) */
316 } /* ! (zwc->zbc == NULL) */
317
318 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);
319 if (strm->avail_in > 0) {
320 zwc->inBuffer.src = strm->next_in;
321 zwc->inBuffer.size = strm->avail_in;
322 zwc->inBuffer.pos = 0;
323 zwc->outBuffer.dst = strm->next_out;
324 zwc->outBuffer.size = strm->avail_out;
325 zwc->outBuffer.pos = 0;
326 { size_t const cErr = ZSTD_compressStream(zwc->zbc, &zwc->outBuffer, &zwc->inBuffer);
327 LOG_WRAPPERC("deflate ZSTD_compressStream srcSize=%d dstCapacity=%d\n", (int)zwc->inBuffer.size, (int)zwc->outBuffer.size);
328 if (ZSTD_isError(cErr)) return ZWRAPC_finishWithError(zwc, strm, 0);
329 }
330 strm->next_out += zwc->outBuffer.pos;
331 strm->total_out += zwc->outBuffer.pos;
332 strm->avail_out -= zwc->outBuffer.pos;
333 strm->total_in += zwc->inBuffer.pos;
334 zwc->totalInBytes += zwc->inBuffer.pos;
335 strm->next_in += zwc->inBuffer.pos;
336 strm->avail_in -= zwc->inBuffer.pos;
337 }
338
339 if (flush == Z_FULL_FLUSH
340 #if ZLIB_VERNUM >= 0x1240
341 || flush == Z_TREES
342 #endif
343 || flush == Z_BLOCK)
344 return ZWRAPC_finishWithErrorMsg(strm, "Z_FULL_FLUSH, Z_BLOCK and Z_TREES are not supported!");
345
346 if (flush == Z_FINISH) {
347 size_t bytesLeft;
348 if (zwc->streamEnd) return Z_STREAM_END;
349 zwc->outBuffer.dst = strm->next_out;
350 zwc->outBuffer.size = strm->avail_out;
351 zwc->outBuffer.pos = 0;
352 bytesLeft = ZSTD_endStream(zwc->zbc, &zwc->outBuffer);
353 LOG_WRAPPERC("deflate ZSTD_endStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft);
354 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0);
355 strm->next_out += zwc->outBuffer.pos;
356 strm->total_out += zwc->outBuffer.pos;
357 strm->avail_out -= zwc->outBuffer.pos;
358 if (bytesLeft == 0) {
359 zwc->streamEnd = 1;
360 LOG_WRAPPERC("Z_STREAM_END2 strm->total_in=%d strm->avail_out=%d strm->total_out=%d\n",
361 (int)strm->total_in, (int)strm->avail_out, (int)strm->total_out);
362 return Z_STREAM_END;
363 } }
364 else
365 if (flush == Z_SYNC_FLUSH || flush == Z_PARTIAL_FLUSH) {
366 size_t bytesLeft;
367 zwc->outBuffer.dst = strm->next_out;
368 zwc->outBuffer.size = strm->avail_out;
369 zwc->outBuffer.pos = 0;
370 bytesLeft = ZSTD_flushStream(zwc->zbc, &zwc->outBuffer);
371 LOG_WRAPPERC("deflate ZSTD_flushStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft);
372 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0);
373 strm->next_out += zwc->outBuffer.pos;
374 strm->total_out += zwc->outBuffer.pos;
375 strm->avail_out -= zwc->outBuffer.pos;
376 }
377 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);
378 return Z_OK;
379 }
380
381
z_deflateEnd(z_streamp strm)382 ZEXTERN int ZEXPORT z_deflateEnd OF((z_streamp strm))
383 {
384 if (!g_ZWRAP_useZSTDcompression) {
385 LOG_WRAPPERC("- deflateEnd\n");
386 return deflateEnd(strm);
387 }
388 LOG_WRAPPERC("- deflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out));
389 { size_t errorCode;
390 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
391 if (zwc == NULL) return Z_OK; /* structures are already freed */
392 strm->state = NULL;
393 errorCode = ZWRAP_freeCCtx(zwc);
394 if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR;
395 }
396 return Z_OK;
397 }
398
399
z_deflateBound(z_streamp strm,uLong sourceLen)400 ZEXTERN uLong ZEXPORT z_deflateBound OF((z_streamp strm,
401 uLong sourceLen))
402 {
403 if (!g_ZWRAP_useZSTDcompression)
404 return deflateBound(strm, sourceLen);
405
406 return ZSTD_compressBound(sourceLen);
407 }
408
409
z_deflateParams(z_streamp strm,int level,int strategy)410 ZEXTERN int ZEXPORT z_deflateParams OF((z_streamp strm,
411 int level,
412 int strategy))
413 {
414 if (!g_ZWRAP_useZSTDcompression) {
415 LOG_WRAPPERC("- deflateParams level=%d strategy=%d\n", level, strategy);
416 return deflateParams(strm, level, strategy);
417 }
418
419 return Z_OK;
420 }
421
422
423
424
425
426 /* === Decompression === */
427
428 typedef enum { ZWRAP_ZLIB_STREAM, ZWRAP_ZSTD_STREAM, ZWRAP_UNKNOWN_STREAM } ZWRAP_stream_type;
429
430 typedef struct {
431 ZSTD_DStream* zbd;
432 char headerBuf[16]; /* must be >= ZSTD_frameHeaderSize_min */
433 int errorCount;
434 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
435 ZWRAP_state_t decompState;
436 ZSTD_inBuffer inBuffer;
437 ZSTD_outBuffer outBuffer;
438
439 /* zlib params */
440 int stream_size;
441 char *version;
442 int windowBits;
443 ZSTD_customMem customMem;
444 z_stream allocFunc; /* just to copy zalloc, zfree, opaque */
445 } ZWRAP_DCtx;
446
447
ZWRAP_initDCtx(ZWRAP_DCtx * zwd)448 static void ZWRAP_initDCtx(ZWRAP_DCtx* zwd)
449 {
450 zwd->errorCount = 0;
451 zwd->outBuffer.pos = 0;
452 zwd->outBuffer.size = 0;
453 }
454
ZWRAP_createDCtx(z_streamp strm)455 static ZWRAP_DCtx* ZWRAP_createDCtx(z_streamp strm)
456 {
457 ZWRAP_DCtx* zwd;
458 MEM_STATIC_ASSERT(sizeof(zwd->headerBuf) >= ZSTD_FRAMEHEADERSIZE_MIN); /* check static buffer size condition */
459
460 if (strm->zalloc && strm->zfree) {
461 zwd = (ZWRAP_DCtx*)strm->zalloc(strm->opaque, 1, sizeof(ZWRAP_DCtx));
462 if (zwd==NULL) return NULL;
463 memset(zwd, 0, sizeof(ZWRAP_DCtx));
464 zwd->allocFunc = *strm; /* just to copy zalloc, zfree & opaque */
465 { ZSTD_customMem const ZWRAP_customMem = { ZWRAP_allocFunction, ZWRAP_freeFunction, &zwd->allocFunc };
466 zwd->customMem = ZWRAP_customMem; }
467 } else {
468 zwd = (ZWRAP_DCtx*)calloc(1, sizeof(*zwd));
469 if (zwd==NULL) return NULL;
470 }
471
472 ZWRAP_initDCtx(zwd);
473 return zwd;
474 }
475
ZWRAP_freeDCtx(ZWRAP_DCtx * zwd)476 static size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd)
477 {
478 if (zwd==NULL) return 0; /* support free on null */
479 ZSTD_freeDStream(zwd->zbd);
480 ZSTD_free(zwd->version, zwd->customMem);
481 ZSTD_free(zwd, zwd->customMem);
482 return 0;
483 }
484
485
ZWRAP_isUsingZSTDdecompression(z_streamp strm)486 int ZWRAP_isUsingZSTDdecompression(z_streamp strm)
487 {
488 if (strm == NULL) return 0;
489 return (strm->reserved == ZWRAP_ZSTD_STREAM);
490 }
491
492
ZWRAPD_finishWithError(ZWRAP_DCtx * zwd,z_streamp strm,int error)493 static int ZWRAPD_finishWithError(ZWRAP_DCtx* zwd, z_streamp strm, int error)
494 {
495 LOG_WRAPPERD("- ZWRAPD_finishWithError=%d\n", error);
496 ZWRAP_freeDCtx(zwd);
497 strm->state = NULL;
498 return (error) ? error : Z_STREAM_ERROR;
499 }
500
ZWRAPD_finishWithErrorMsg(z_streamp strm,char * message)501 static int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message)
502 {
503 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
504 strm->msg = message;
505 if (zwd == NULL) return Z_STREAM_ERROR;
506
507 return ZWRAPD_finishWithError(zwd, strm, 0);
508 }
509
510
z_inflateInit_(z_streamp strm,const char * version,int stream_size)511 ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm,
512 const char *version, int stream_size))
513 {
514 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) {
515 strm->reserved = ZWRAP_ZLIB_STREAM;
516 return inflateInit(strm);
517 }
518
519 { ZWRAP_DCtx* const zwd = ZWRAP_createDCtx(strm);
520 LOG_WRAPPERD("- inflateInit\n");
521 if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
522
523 zwd->version = ZSTD_malloc(strlen(version)+1, zwd->customMem);
524 if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
525 strcpy(zwd->version, version);
526
527 zwd->stream_size = stream_size;
528 zwd->totalInBytes = 0;
529 strm->state = (struct internal_state*) zwd;
530 strm->total_in = 0;
531 strm->total_out = 0;
532 strm->reserved = ZWRAP_UNKNOWN_STREAM;
533 strm->adler = 0;
534 }
535
536 return Z_OK;
537 }
538
539
z_inflateInit2_(z_streamp strm,int windowBits,const char * version,int stream_size)540 ZEXTERN int ZEXPORT z_inflateInit2_ OF((z_streamp strm, int windowBits,
541 const char *version, int stream_size))
542 {
543 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) {
544 return inflateInit2_(strm, windowBits, version, stream_size);
545 }
546
547 { int const ret = z_inflateInit_ (strm, version, stream_size);
548 LOG_WRAPPERD("- inflateInit2 windowBits=%d\n", windowBits);
549 if (ret == Z_OK) {
550 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state;
551 if (zwd == NULL) return Z_STREAM_ERROR;
552 zwd->windowBits = windowBits;
553 }
554 return ret;
555 }
556 }
557
ZWRAP_inflateReset_keepDict(z_streamp strm)558 int ZWRAP_inflateReset_keepDict(z_streamp strm)
559 {
560 LOG_WRAPPERD("- ZWRAP_inflateReset_keepDict\n");
561 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
562 return inflateReset(strm);
563
564 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
565 if (zwd == NULL) return Z_STREAM_ERROR;
566 ZWRAP_initDCtx(zwd);
567 zwd->decompState = ZWRAP_useReset;
568 zwd->totalInBytes = 0;
569 }
570
571 strm->total_in = 0;
572 strm->total_out = 0;
573 return Z_OK;
574 }
575
576
z_inflateReset(z_streamp strm)577 ZEXTERN int ZEXPORT z_inflateReset OF((z_streamp strm))
578 {
579 LOG_WRAPPERD("- inflateReset\n");
580 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
581 return inflateReset(strm);
582
583 { int const ret = ZWRAP_inflateReset_keepDict(strm);
584 if (ret != Z_OK) return ret; }
585
586 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
587 if (zwd == NULL) return Z_STREAM_ERROR;
588 zwd->decompState = ZWRAP_useInit; }
589
590 return Z_OK;
591 }
592
593
594 #if ZLIB_VERNUM >= 0x1240
z_inflateReset2(z_streamp strm,int windowBits)595 ZEXTERN int ZEXPORT z_inflateReset2 OF((z_streamp strm,
596 int windowBits))
597 {
598 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
599 return inflateReset2(strm, windowBits);
600
601 { int const ret = z_inflateReset (strm);
602 if (ret == Z_OK) {
603 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state;
604 if (zwd == NULL) return Z_STREAM_ERROR;
605 zwd->windowBits = windowBits;
606 }
607 return ret;
608 }
609 }
610 #endif
611
612
z_inflateSetDictionary(z_streamp strm,const Bytef * dictionary,uInt dictLength)613 ZEXTERN int ZEXPORT z_inflateSetDictionary OF((z_streamp strm,
614 const Bytef *dictionary,
615 uInt dictLength))
616 {
617 LOG_WRAPPERD("- inflateSetDictionary\n");
618 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
619 return inflateSetDictionary(strm, dictionary, dictLength);
620
621 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
622 if (zwd == NULL || zwd->zbd == NULL) return Z_STREAM_ERROR;
623 { size_t const initErr = ZSTD_initDStream_usingDict(zwd->zbd, dictionary, dictLength);
624 if (ZSTD_isError(initErr)) return ZWRAPD_finishWithError(zwd, strm, 0); }
625 zwd->decompState = ZWRAP_useReset;
626
627 if (zwd->totalInBytes == ZSTD_HEADERSIZE) {
628 zwd->inBuffer.src = zwd->headerBuf;
629 zwd->inBuffer.size = zwd->totalInBytes;
630 zwd->inBuffer.pos = 0;
631 zwd->outBuffer.dst = strm->next_out;
632 zwd->outBuffer.size = 0;
633 zwd->outBuffer.pos = 0;
634 { size_t const errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
635 LOG_WRAPPERD("inflateSetDictionary ZSTD_decompressStream errorCode=%d srcSize=%d dstCapacity=%d\n",
636 (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size);
637 if (zwd->inBuffer.pos < zwd->outBuffer.size || ZSTD_isError(errorCode)) {
638 LOG_WRAPPERD("ERROR: ZSTD_decompressStream %s\n",
639 ZSTD_getErrorName(errorCode));
640 return ZWRAPD_finishWithError(zwd, strm, 0);
641 } } } }
642
643 return Z_OK;
644 }
645
646
z_inflate(z_streamp strm,int flush)647 ZEXTERN int ZEXPORT z_inflate OF((z_streamp strm, int flush))
648 {
649 ZWRAP_DCtx* zwd;
650
651 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) {
652 int const result = inflate(strm, flush);
653 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
654 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, result);
655 return result;
656 }
657
658 if (strm->avail_in <= 0) return Z_OK;
659
660 zwd = (ZWRAP_DCtx*) strm->state;
661 LOG_WRAPPERD("- inflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
662 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
663
664 if (zwd == NULL) return Z_STREAM_ERROR;
665 if (zwd->decompState == ZWRAP_streamEnd) return Z_STREAM_END;
666
667 if (zwd->totalInBytes < ZLIB_HEADERSIZE) {
668 if (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) {
669 if (MEM_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) {
670 { int const initErr = (zwd->windowBits) ?
671 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
672 inflateInit_(strm, zwd->version, zwd->stream_size);
673 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
674 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
675 }
676
677 strm->reserved = ZWRAP_ZLIB_STREAM;
678 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
679 if (ZSTD_isError(freeErr)) goto error; }
680
681 { int const result = (flush == Z_INFLATE_SYNC) ?
682 inflateSync(strm) :
683 inflate(strm, flush);
684 LOG_WRAPPERD("- inflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
685 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res);
686 return result;
687 } }
688 } else { /* ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
689 size_t const srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - zwd->totalInBytes);
690 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
691 strm->total_in += srcSize;
692 zwd->totalInBytes += srcSize;
693 strm->next_in += srcSize;
694 strm->avail_in -= srcSize;
695 if (zwd->totalInBytes < ZLIB_HEADERSIZE) return Z_OK;
696
697 if (MEM_readLE32(zwd->headerBuf) != ZSTD_MAGICNUMBER) {
698 z_stream strm2;
699 strm2.next_in = strm->next_in;
700 strm2.avail_in = strm->avail_in;
701 strm2.next_out = strm->next_out;
702 strm2.avail_out = strm->avail_out;
703
704 { int const initErr = (zwd->windowBits) ?
705 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
706 inflateInit_(strm, zwd->version, zwd->stream_size);
707 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
708 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
709 }
710
711 /* inflate header */
712 strm->next_in = (unsigned char*)zwd->headerBuf;
713 strm->avail_in = ZLIB_HEADERSIZE;
714 strm->avail_out = 0;
715 { int const dErr = inflate(strm, Z_NO_FLUSH);
716 LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n",
717 dErr, (int)strm->avail_in);
718 if (dErr != Z_OK)
719 return ZWRAPD_finishWithError(zwd, strm, dErr);
720 }
721 if (strm->avail_in > 0) goto error;
722
723 strm->next_in = strm2.next_in;
724 strm->avail_in = strm2.avail_in;
725 strm->next_out = strm2.next_out;
726 strm->avail_out = strm2.avail_out;
727
728 strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */
729 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
730 if (ZSTD_isError(freeErr)) goto error; }
731
732 { int const result = (flush == Z_INFLATE_SYNC) ?
733 inflateSync(strm) :
734 inflate(strm, flush);
735 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
736 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res);
737 return result;
738 } } } /* if ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
739 } /* (zwd->totalInBytes < ZLIB_HEADERSIZE) */
740
741 strm->reserved = ZWRAP_ZSTD_STREAM; /* mark as zstd steam */
742
743 if (flush == Z_INFLATE_SYNC) { strm->msg = "inflateSync is not supported!"; goto error; }
744
745 if (!zwd->zbd) {
746 zwd->zbd = ZSTD_createDStream_advanced(zwd->customMem);
747 if (zwd->zbd == NULL) { LOG_WRAPPERD("ERROR: ZSTD_createDStream_advanced\n"); goto error; }
748 zwd->decompState = ZWRAP_useInit;
749 }
750
751 if (zwd->totalInBytes < ZSTD_HEADERSIZE) {
752 if (zwd->totalInBytes == 0 && strm->avail_in >= ZSTD_HEADERSIZE) {
753 if (zwd->decompState == ZWRAP_useInit) {
754 size_t const initErr = ZSTD_initDStream(zwd->zbd);
755 if (ZSTD_isError(initErr)) {
756 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
757 ZSTD_getErrorName(initErr));
758 goto error;
759 }
760 } else {
761 size_t const resetErr = ZSTD_resetDStream(zwd->zbd);
762 if (ZSTD_isError(resetErr)) goto error;
763 }
764 } else {
765 size_t const srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - zwd->totalInBytes);
766 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
767 strm->total_in += srcSize;
768 zwd->totalInBytes += srcSize;
769 strm->next_in += srcSize;
770 strm->avail_in -= srcSize;
771 if (zwd->totalInBytes < ZSTD_HEADERSIZE) return Z_OK;
772
773 if (zwd->decompState == ZWRAP_useInit) {
774 size_t const initErr = ZSTD_initDStream(zwd->zbd);
775 if (ZSTD_isError(initErr)) {
776 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
777 ZSTD_getErrorName(initErr));
778 goto error;
779 }
780 } else {
781 size_t const resetErr = ZSTD_resetDStream(zwd->zbd);
782 if (ZSTD_isError(resetErr)) goto error;
783 }
784
785 zwd->inBuffer.src = zwd->headerBuf;
786 zwd->inBuffer.size = ZSTD_HEADERSIZE;
787 zwd->inBuffer.pos = 0;
788 zwd->outBuffer.dst = strm->next_out;
789 zwd->outBuffer.size = 0;
790 zwd->outBuffer.pos = 0;
791 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
792 LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n",
793 (int)dErr, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size);
794 if (ZSTD_isError(dErr)) {
795 LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(dErr));
796 goto error;
797 } }
798 if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */
799 }
800 } /* (zwd->totalInBytes < ZSTD_HEADERSIZE) */
801
802 zwd->inBuffer.src = strm->next_in;
803 zwd->inBuffer.size = strm->avail_in;
804 zwd->inBuffer.pos = 0;
805 zwd->outBuffer.dst = strm->next_out;
806 zwd->outBuffer.size = strm->avail_out;
807 zwd->outBuffer.pos = 0;
808 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
809 LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n",
810 (int)dErr, (int)strm->avail_in, (int)strm->avail_out);
811 if (ZSTD_isError(dErr)) {
812 zwd->errorCount++;
813 LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n",
814 ZSTD_getErrorName(dErr), zwd->errorCount);
815 if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error;
816 }
817 LOG_WRAPPERD("inflate inBuffer.pos=%d inBuffer.size=%d outBuffer.pos=%d outBuffer.size=%d o\n",
818 (int)zwd->inBuffer.pos, (int)zwd->inBuffer.size, (int)zwd->outBuffer.pos, (int)zwd->outBuffer.size);
819 strm->next_out += zwd->outBuffer.pos;
820 strm->total_out += zwd->outBuffer.pos;
821 strm->avail_out -= zwd->outBuffer.pos;
822 strm->total_in += zwd->inBuffer.pos;
823 zwd->totalInBytes += zwd->inBuffer.pos;
824 strm->next_in += zwd->inBuffer.pos;
825 strm->avail_in -= zwd->inBuffer.pos;
826 if (dErr == 0) {
827 LOG_WRAPPERD("inflate Z_STREAM_END1 avail_in=%d avail_out=%d total_in=%d total_out=%d\n",
828 (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out);
829 zwd->decompState = ZWRAP_streamEnd;
830 return Z_STREAM_END;
831 }
832 } /* dErr lifetime */
833
834 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n",
835 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, Z_OK);
836 return Z_OK;
837
838 error:
839 return ZWRAPD_finishWithError(zwd, strm, 0);
840 }
841
842
z_inflateEnd(z_streamp strm)843 ZEXTERN int ZEXPORT z_inflateEnd OF((z_streamp strm))
844 {
845 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
846 return inflateEnd(strm);
847
848 LOG_WRAPPERD("- inflateEnd total_in=%d total_out=%d\n",
849 (int)(strm->total_in), (int)(strm->total_out));
850 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
851 if (zwd == NULL) return Z_OK; /* structures are already freed */
852 { size_t const freeErr = ZWRAP_freeDCtx(zwd);
853 if (ZSTD_isError(freeErr)) return Z_STREAM_ERROR; }
854 strm->state = NULL;
855 }
856 return Z_OK;
857 }
858
859
z_inflateSync(z_streamp strm)860 ZEXTERN int ZEXPORT z_inflateSync OF((z_streamp strm))
861 {
862 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) {
863 return inflateSync(strm);
864 }
865
866 return z_inflate(strm, Z_INFLATE_SYNC);
867 }
868
869
870
871 /* Advanced compression functions */
z_deflateCopy(z_streamp dest,z_streamp source)872 ZEXTERN int ZEXPORT z_deflateCopy OF((z_streamp dest,
873 z_streamp source))
874 {
875 if (!g_ZWRAP_useZSTDcompression)
876 return deflateCopy(dest, source);
877 return ZWRAPC_finishWithErrorMsg(source, "deflateCopy is not supported!");
878 }
879
880
z_deflateTune(z_streamp strm,int good_length,int max_lazy,int nice_length,int max_chain)881 ZEXTERN int ZEXPORT z_deflateTune OF((z_streamp strm,
882 int good_length,
883 int max_lazy,
884 int nice_length,
885 int max_chain))
886 {
887 if (!g_ZWRAP_useZSTDcompression)
888 return deflateTune(strm, good_length, max_lazy, nice_length, max_chain);
889 return ZWRAPC_finishWithErrorMsg(strm, "deflateTune is not supported!");
890 }
891
892
893 #if ZLIB_VERNUM >= 0x1260
z_deflatePending(z_streamp strm,unsigned * pending,int * bits)894 ZEXTERN int ZEXPORT z_deflatePending OF((z_streamp strm,
895 unsigned *pending,
896 int *bits))
897 {
898 if (!g_ZWRAP_useZSTDcompression)
899 return deflatePending(strm, pending, bits);
900 return ZWRAPC_finishWithErrorMsg(strm, "deflatePending is not supported!");
901 }
902 #endif
903
904
z_deflatePrime(z_streamp strm,int bits,int value)905 ZEXTERN int ZEXPORT z_deflatePrime OF((z_streamp strm,
906 int bits,
907 int value))
908 {
909 if (!g_ZWRAP_useZSTDcompression)
910 return deflatePrime(strm, bits, value);
911 return ZWRAPC_finishWithErrorMsg(strm, "deflatePrime is not supported!");
912 }
913
914
z_deflateSetHeader(z_streamp strm,gz_headerp head)915 ZEXTERN int ZEXPORT z_deflateSetHeader OF((z_streamp strm,
916 gz_headerp head))
917 {
918 if (!g_ZWRAP_useZSTDcompression)
919 return deflateSetHeader(strm, head);
920 return ZWRAPC_finishWithErrorMsg(strm, "deflateSetHeader is not supported!");
921 }
922
923
924
925
926 /* Advanced decompression functions */
927 #if ZLIB_VERNUM >= 0x1280
z_inflateGetDictionary(z_streamp strm,Bytef * dictionary,uInt * dictLength)928 ZEXTERN int ZEXPORT z_inflateGetDictionary OF((z_streamp strm,
929 Bytef *dictionary,
930 uInt *dictLength))
931 {
932 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
933 return inflateGetDictionary(strm, dictionary, dictLength);
934 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetDictionary is not supported!");
935 }
936 #endif
937
938
z_inflateCopy(z_streamp dest,z_streamp source)939 ZEXTERN int ZEXPORT z_inflateCopy OF((z_streamp dest,
940 z_streamp source))
941 {
942 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !source->reserved)
943 return inflateCopy(dest, source);
944 return ZWRAPD_finishWithErrorMsg(source, "inflateCopy is not supported!");
945 }
946
947
948 #if ZLIB_VERNUM >= 0x1240
z_inflateMark(z_streamp strm)949 ZEXTERN long ZEXPORT z_inflateMark OF((z_streamp strm))
950 {
951 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
952 return inflateMark(strm);
953 return ZWRAPD_finishWithErrorMsg(strm, "inflateMark is not supported!");
954 }
955 #endif
956
957
z_inflatePrime(z_streamp strm,int bits,int value)958 ZEXTERN int ZEXPORT z_inflatePrime OF((z_streamp strm,
959 int bits,
960 int value))
961 {
962 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
963 return inflatePrime(strm, bits, value);
964 return ZWRAPD_finishWithErrorMsg(strm, "inflatePrime is not supported!");
965 }
966
967
z_inflateGetHeader(z_streamp strm,gz_headerp head)968 ZEXTERN int ZEXPORT z_inflateGetHeader OF((z_streamp strm,
969 gz_headerp head))
970 {
971 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
972 return inflateGetHeader(strm, head);
973 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetHeader is not supported!");
974 }
975
976
z_inflateBackInit_(z_streamp strm,int windowBits,unsigned char FAR * window,const char * version,int stream_size)977 ZEXTERN int ZEXPORT z_inflateBackInit_ OF((z_streamp strm, int windowBits,
978 unsigned char FAR *window,
979 const char *version,
980 int stream_size))
981 {
982 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
983 return inflateBackInit_(strm, windowBits, window, version, stream_size);
984 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackInit is not supported!");
985 }
986
987
z_inflateBack(z_streamp strm,in_func in,void FAR * in_desc,out_func out,void FAR * out_desc)988 ZEXTERN int ZEXPORT z_inflateBack OF((z_streamp strm,
989 in_func in, void FAR *in_desc,
990 out_func out, void FAR *out_desc))
991 {
992 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
993 return inflateBack(strm, in, in_desc, out, out_desc);
994 return ZWRAPD_finishWithErrorMsg(strm, "inflateBack is not supported!");
995 }
996
997
z_inflateBackEnd(z_streamp strm)998 ZEXTERN int ZEXPORT z_inflateBackEnd OF((z_streamp strm))
999 {
1000 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved)
1001 return inflateBackEnd(strm);
1002 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackEnd is not supported!");
1003 }
1004
1005
z_zlibCompileFlags(void)1006 ZEXTERN uLong ZEXPORT z_zlibCompileFlags OF((void)) { return zlibCompileFlags(); };
1007
1008
1009
1010 /* === utility functions === */
1011 #ifndef Z_SOLO
1012
z_compress(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen)1013 ZEXTERN int ZEXPORT z_compress OF((Bytef *dest, uLongf *destLen,
1014 const Bytef *source, uLong sourceLen))
1015 {
1016 if (!g_ZWRAP_useZSTDcompression)
1017 return compress(dest, destLen, source, sourceLen);
1018
1019 { size_t dstCapacity = *destLen;
1020 size_t const cSize = ZSTD_compress(dest, dstCapacity,
1021 source, sourceLen,
1022 ZWRAP_DEFAULT_CLEVEL);
1023 LOG_WRAPPERD("z_compress sourceLen=%d dstCapacity=%d\n",
1024 (int)sourceLen, (int)dstCapacity);
1025 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR;
1026 *destLen = cSize;
1027 }
1028 return Z_OK;
1029 }
1030
1031
z_compress2(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen,int level)1032 ZEXTERN int ZEXPORT z_compress2 OF((Bytef *dest, uLongf *destLen,
1033 const Bytef *source, uLong sourceLen,
1034 int level))
1035 {
1036 if (!g_ZWRAP_useZSTDcompression)
1037 return compress2(dest, destLen, source, sourceLen, level);
1038
1039 { size_t dstCapacity = *destLen;
1040 size_t const cSize = ZSTD_compress(dest, dstCapacity, source, sourceLen, level);
1041 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR;
1042 *destLen = cSize;
1043 }
1044 return Z_OK;
1045 }
1046
1047
z_compressBound(uLong sourceLen)1048 ZEXTERN uLong ZEXPORT z_compressBound OF((uLong sourceLen))
1049 {
1050 if (!g_ZWRAP_useZSTDcompression)
1051 return compressBound(sourceLen);
1052
1053 return ZSTD_compressBound(sourceLen);
1054 }
1055
1056
z_uncompress(Bytef * dest,uLongf * destLen,const Bytef * source,uLong sourceLen)1057 ZEXTERN int ZEXPORT z_uncompress OF((Bytef *dest, uLongf *destLen,
1058 const Bytef *source, uLong sourceLen))
1059 {
1060 if (!ZSTD_isFrame(source, sourceLen))
1061 return uncompress(dest, destLen, source, sourceLen);
1062
1063 { size_t dstCapacity = *destLen;
1064 size_t const dSize = ZSTD_decompress(dest, dstCapacity, source, sourceLen);
1065 if (ZSTD_isError(dSize)) return Z_STREAM_ERROR;
1066 *destLen = dSize;
1067 }
1068 return Z_OK;
1069 }
1070
1071 #endif /* !Z_SOLO */
1072
1073
1074 /* checksum functions */
1075
z_adler32(uLong adler,const Bytef * buf,uInt len)1076 ZEXTERN uLong ZEXPORT z_adler32 OF((uLong adler, const Bytef *buf, uInt len))
1077 {
1078 return adler32(adler, buf, len);
1079 }
1080
z_crc32(uLong crc,const Bytef * buf,uInt len)1081 ZEXTERN uLong ZEXPORT z_crc32 OF((uLong crc, const Bytef *buf, uInt len))
1082 {
1083 return crc32(crc, buf, len);
1084 }
1085
1086
1087 #if ZLIB_VERNUM >= 0x12B0
z_adler32_z(uLong adler,const Bytef * buf,z_size_t len)1088 ZEXTERN uLong ZEXPORT z_adler32_z OF((uLong adler, const Bytef *buf, z_size_t len))
1089 {
1090 return adler32_z(adler, buf, len);
1091 }
1092
z_crc32_z(uLong crc,const Bytef * buf,z_size_t len)1093 ZEXTERN uLong ZEXPORT z_crc32_z OF((uLong crc, const Bytef *buf, z_size_t len))
1094 {
1095 return crc32_z(crc, buf, len);
1096 }
1097 #endif
1098
1099
1100 #if ZLIB_VERNUM >= 0x1270
z_get_crc_table(void)1101 ZEXTERN const z_crc_t FAR * ZEXPORT z_get_crc_table OF((void))
1102 {
1103 return get_crc_table();
1104 }
1105 #endif
1106