648db22b |
1 | /* |
2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
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 | |
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 | |
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 | |
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 | |
88 | void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; } |
89 | |
90 | int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; } |
91 | |
92 | |
93 | |
94 | static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO; |
95 | |
96 | void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; } |
97 | |
98 | ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; } |
99 | |
100 | |
101 | |
102 | const char * zstdVersion(void) { return ZSTD_VERSION_STRING; } |
103 | |
104 | ZEXTERN const char * ZEXPORT z_zlibVersion _Z_OF((void)) { return zlibVersion(); } |
105 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
258 | static struct internal_state* convert_into_sis(void* ptr) |
259 | { |
260 | return (struct internal_state*) ptr; |
261 | } |
262 | |
263 | ZEXTERN int ZEXPORT z_deflateInit_ _Z_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 | |
290 | ZEXTERN int ZEXPORT z_deflateInit2_ _Z_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 | |
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 | |
322 | ZEXTERN int ZEXPORT z_deflateReset _Z_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 | |
337 | ZEXTERN int ZEXPORT z_deflateSetDictionary _Z_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 | |
362 | ZEXTERN int ZEXPORT z_deflate _Z_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 | |
468 | ZEXTERN int ZEXPORT z_deflateEnd _Z_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 | |
486 | ZEXTERN uLong ZEXPORT z_deflateBound _Z_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 | |
496 | ZEXTERN int ZEXPORT z_deflateParams _Z_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 | |
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 | |
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 | |
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 | |
572 | int ZWRAP_isUsingZSTDdecompression(z_streamp strm) |
573 | { |
574 | if (strm == NULL) return 0; |
575 | return (strm->reserved == ZWRAP_ZSTD_STREAM); |
576 | } |
577 | |
578 | |
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 | |
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 | |
597 | ZEXTERN int ZEXPORT z_inflateInit_ _Z_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 | |
626 | ZEXTERN int ZEXPORT z_inflateInit2_ _Z_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 | |
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 | |
663 | ZEXTERN int ZEXPORT z_inflateReset _Z_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 |
681 | ZEXTERN int ZEXPORT z_inflateReset2 _Z_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 | |
699 | ZEXTERN int ZEXPORT z_inflateSetDictionary _Z_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 resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only); |
710 | if (ZSTD_isError(resetErr)) return ZWRAPD_finishWithError(zwd, strm, 0); } |
711 | { size_t const loadErr = ZSTD_DCtx_loadDictionary(zwd->zbd, dictionary, dictLength); |
712 | if (ZSTD_isError(loadErr)) return ZWRAPD_finishWithError(zwd, strm, 0); } |
713 | zwd->decompState = ZWRAP_useReset; |
714 | |
715 | if (zwd->totalInBytes == ZSTD_HEADERSIZE) { |
716 | zwd->inBuffer.src = zwd->headerBuf; |
717 | zwd->inBuffer.size = zwd->totalInBytes; |
718 | zwd->inBuffer.pos = 0; |
719 | zwd->outBuffer.dst = strm->next_out; |
720 | zwd->outBuffer.size = 0; |
721 | zwd->outBuffer.pos = 0; |
722 | { size_t const errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); |
723 | LOG_WRAPPERD("inflateSetDictionary ZSTD_decompressStream errorCode=%d srcSize=%d dstCapacity=%d\n", |
724 | (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); |
725 | if (zwd->inBuffer.pos < zwd->outBuffer.size || ZSTD_isError(errorCode)) { |
726 | LOG_WRAPPERD("ERROR: ZSTD_decompressStream %s\n", |
727 | ZSTD_getErrorName(errorCode)); |
728 | return ZWRAPD_finishWithError(zwd, strm, 0); |
729 | } } } } |
730 | |
731 | return Z_OK; |
732 | } |
733 | |
734 | |
735 | ZEXTERN int ZEXPORT z_inflate _Z_OF((z_streamp strm, int flush)) |
736 | { |
737 | ZWRAP_DCtx* zwd; |
738 | |
739 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { |
740 | int const result = inflate(strm, flush); |
741 | LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", |
742 | (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, result); |
743 | return result; |
744 | } |
745 | |
746 | if (strm->avail_in <= 0) return Z_OK; |
747 | |
748 | zwd = (ZWRAP_DCtx*) strm->state; |
749 | LOG_WRAPPERD("- inflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", |
750 | (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); |
751 | |
752 | if (zwd == NULL) return Z_STREAM_ERROR; |
753 | if (zwd->decompState == ZWRAP_streamEnd) return Z_STREAM_END; |
754 | |
755 | if (zwd->totalInBytes < ZLIB_HEADERSIZE) { |
756 | if (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) { |
757 | if (ZWRAP_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) { |
758 | { int const initErr = (zwd->windowBits) ? |
759 | inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) : |
760 | inflateInit_(strm, zwd->version, zwd->stream_size); |
761 | LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr); |
762 | if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr); |
763 | } |
764 | |
765 | strm->reserved = ZWRAP_ZLIB_STREAM; |
766 | { size_t const freeErr = ZWRAP_freeDCtx(zwd); |
767 | if (ZSTD_isError(freeErr)) goto error; } |
768 | |
769 | { int const result = (flush == Z_INFLATE_SYNC) ? |
770 | inflateSync(strm) : |
771 | inflate(strm, flush); |
772 | LOG_WRAPPERD("- inflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", |
773 | (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); |
774 | return result; |
775 | } } |
776 | } else { /* ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */ |
777 | size_t const srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - zwd->totalInBytes); |
778 | memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize); |
779 | strm->total_in += srcSize; |
780 | zwd->totalInBytes += srcSize; |
781 | strm->next_in += srcSize; |
782 | strm->avail_in -= srcSize; |
783 | if (zwd->totalInBytes < ZLIB_HEADERSIZE) return Z_OK; |
784 | |
785 | if (ZWRAP_readLE32(zwd->headerBuf) != ZSTD_MAGICNUMBER) { |
786 | z_stream strm2; |
787 | strm2.next_in = strm->next_in; |
788 | strm2.avail_in = strm->avail_in; |
789 | strm2.next_out = strm->next_out; |
790 | strm2.avail_out = strm->avail_out; |
791 | |
792 | { int const initErr = (zwd->windowBits) ? |
793 | inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) : |
794 | inflateInit_(strm, zwd->version, zwd->stream_size); |
795 | LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr); |
796 | if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr); |
797 | } |
798 | |
799 | /* inflate header */ |
800 | strm->next_in = (unsigned char*)zwd->headerBuf; |
801 | strm->avail_in = ZLIB_HEADERSIZE; |
802 | strm->avail_out = 0; |
803 | { int const dErr = inflate(strm, Z_NO_FLUSH); |
804 | LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n", |
805 | dErr, (int)strm->avail_in); |
806 | if (dErr != Z_OK) |
807 | return ZWRAPD_finishWithError(zwd, strm, dErr); |
808 | } |
809 | if (strm->avail_in > 0) goto error; |
810 | |
811 | strm->next_in = strm2.next_in; |
812 | strm->avail_in = strm2.avail_in; |
813 | strm->next_out = strm2.next_out; |
814 | strm->avail_out = strm2.avail_out; |
815 | |
816 | strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */ |
817 | { size_t const freeErr = ZWRAP_freeDCtx(zwd); |
818 | if (ZSTD_isError(freeErr)) goto error; } |
819 | |
820 | { int const result = (flush == Z_INFLATE_SYNC) ? |
821 | inflateSync(strm) : |
822 | inflate(strm, flush); |
823 | LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", |
824 | (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); |
825 | return result; |
826 | } } } /* if ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */ |
827 | } /* (zwd->totalInBytes < ZLIB_HEADERSIZE) */ |
828 | |
829 | strm->reserved = ZWRAP_ZSTD_STREAM; /* mark as zstd steam */ |
830 | |
831 | if (flush == Z_INFLATE_SYNC) { strm->msg = "inflateSync is not supported!"; goto error; } |
832 | |
833 | if (!zwd->zbd) { |
834 | zwd->zbd = ZSTD_createDStream_advanced(zwd->customMem); |
835 | if (zwd->zbd == NULL) { LOG_WRAPPERD("ERROR: ZSTD_createDStream_advanced\n"); goto error; } |
836 | zwd->decompState = ZWRAP_useInit; |
837 | } |
838 | |
839 | if (zwd->totalInBytes < ZSTD_HEADERSIZE) { |
840 | if (zwd->totalInBytes == 0 && strm->avail_in >= ZSTD_HEADERSIZE) { |
841 | if (zwd->decompState == ZWRAP_useInit) { |
842 | size_t const initErr = ZSTD_initDStream(zwd->zbd); |
843 | if (ZSTD_isError(initErr)) { |
844 | LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", |
845 | ZSTD_getErrorName(initErr)); |
846 | goto error; |
847 | } |
848 | } else { |
849 | size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only); |
850 | if (ZSTD_isError(resetErr)) goto error; |
851 | } |
852 | } else { |
853 | size_t const srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - zwd->totalInBytes); |
854 | memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize); |
855 | strm->total_in += srcSize; |
856 | zwd->totalInBytes += srcSize; |
857 | strm->next_in += srcSize; |
858 | strm->avail_in -= srcSize; |
859 | if (zwd->totalInBytes < ZSTD_HEADERSIZE) return Z_OK; |
860 | |
861 | if (zwd->decompState == ZWRAP_useInit) { |
862 | size_t const initErr = ZSTD_initDStream(zwd->zbd); |
863 | if (ZSTD_isError(initErr)) { |
864 | LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", |
865 | ZSTD_getErrorName(initErr)); |
866 | goto error; |
867 | } |
868 | } else { |
869 | size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only); |
870 | if (ZSTD_isError(resetErr)) goto error; |
871 | } |
872 | |
873 | zwd->inBuffer.src = zwd->headerBuf; |
874 | zwd->inBuffer.size = ZSTD_HEADERSIZE; |
875 | zwd->inBuffer.pos = 0; |
876 | zwd->outBuffer.dst = strm->next_out; |
877 | zwd->outBuffer.size = 0; |
878 | zwd->outBuffer.pos = 0; |
879 | { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); |
880 | LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n", |
881 | (int)dErr, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); |
882 | if (ZSTD_isError(dErr)) { |
883 | LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(dErr)); |
884 | goto error; |
885 | } } |
886 | if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */ |
887 | } |
888 | } /* (zwd->totalInBytes < ZSTD_HEADERSIZE) */ |
889 | |
890 | zwd->inBuffer.src = strm->next_in; |
891 | zwd->inBuffer.size = strm->avail_in; |
892 | zwd->inBuffer.pos = 0; |
893 | zwd->outBuffer.dst = strm->next_out; |
894 | zwd->outBuffer.size = strm->avail_out; |
895 | zwd->outBuffer.pos = 0; |
896 | { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); |
897 | LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n", |
898 | (int)dErr, (int)strm->avail_in, (int)strm->avail_out); |
899 | if (ZSTD_isError(dErr)) { |
900 | zwd->errorCount++; |
901 | LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n", |
902 | ZSTD_getErrorName(dErr), zwd->errorCount); |
903 | if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error; |
904 | } |
905 | LOG_WRAPPERD("inflate inBuffer.pos=%d inBuffer.size=%d outBuffer.pos=%d outBuffer.size=%d o\n", |
906 | (int)zwd->inBuffer.pos, (int)zwd->inBuffer.size, (int)zwd->outBuffer.pos, (int)zwd->outBuffer.size); |
907 | strm->next_out += zwd->outBuffer.pos; |
908 | strm->total_out += zwd->outBuffer.pos; |
909 | strm->avail_out -= zwd->outBuffer.pos; |
910 | strm->total_in += zwd->inBuffer.pos; |
911 | zwd->totalInBytes += zwd->inBuffer.pos; |
912 | strm->next_in += zwd->inBuffer.pos; |
913 | strm->avail_in -= zwd->inBuffer.pos; |
914 | if (dErr == 0) { |
915 | LOG_WRAPPERD("inflate Z_STREAM_END1 avail_in=%d avail_out=%d total_in=%d total_out=%d\n", |
916 | (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); |
917 | zwd->decompState = ZWRAP_streamEnd; |
918 | return Z_STREAM_END; |
919 | } |
920 | } /* dErr lifetime */ |
921 | |
922 | LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", |
923 | (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, Z_OK); |
924 | return Z_OK; |
925 | |
926 | error: |
927 | return ZWRAPD_finishWithError(zwd, strm, 0); |
928 | } |
929 | |
930 | |
931 | ZEXTERN int ZEXPORT z_inflateEnd _Z_OF((z_streamp strm)) |
932 | { |
933 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
934 | return inflateEnd(strm); |
935 | |
936 | LOG_WRAPPERD("- inflateEnd total_in=%d total_out=%d\n", |
937 | (int)(strm->total_in), (int)(strm->total_out)); |
938 | { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; |
939 | if (zwd == NULL) return Z_OK; /* structures are already freed */ |
940 | { size_t const freeErr = ZWRAP_freeDCtx(zwd); |
941 | if (ZSTD_isError(freeErr)) return Z_STREAM_ERROR; } |
942 | strm->state = NULL; |
943 | } |
944 | return Z_OK; |
945 | } |
946 | |
947 | |
948 | ZEXTERN int ZEXPORT z_inflateSync _Z_OF((z_streamp strm)) |
949 | { |
950 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { |
951 | return inflateSync(strm); |
952 | } |
953 | |
954 | return z_inflate(strm, Z_INFLATE_SYNC); |
955 | } |
956 | |
957 | |
958 | |
959 | /* Advanced compression functions */ |
960 | ZEXTERN int ZEXPORT z_deflateCopy _Z_OF((z_streamp dest, |
961 | z_streamp source)) |
962 | { |
963 | if (!g_ZWRAP_useZSTDcompression) |
964 | return deflateCopy(dest, source); |
965 | return ZWRAPC_finishWithErrorMsg(source, "deflateCopy is not supported!"); |
966 | } |
967 | |
968 | |
969 | ZEXTERN int ZEXPORT z_deflateTune _Z_OF((z_streamp strm, |
970 | int good_length, |
971 | int max_lazy, |
972 | int nice_length, |
973 | int max_chain)) |
974 | { |
975 | if (!g_ZWRAP_useZSTDcompression) |
976 | return deflateTune(strm, good_length, max_lazy, nice_length, max_chain); |
977 | return ZWRAPC_finishWithErrorMsg(strm, "deflateTune is not supported!"); |
978 | } |
979 | |
980 | |
981 | #if ZLIB_VERNUM >= 0x1260 |
982 | ZEXTERN int ZEXPORT z_deflatePending _Z_OF((z_streamp strm, |
983 | unsigned *pending, |
984 | int *bits)) |
985 | { |
986 | if (!g_ZWRAP_useZSTDcompression) |
987 | return deflatePending(strm, pending, bits); |
988 | return ZWRAPC_finishWithErrorMsg(strm, "deflatePending is not supported!"); |
989 | } |
990 | #endif |
991 | |
992 | |
993 | ZEXTERN int ZEXPORT z_deflatePrime _Z_OF((z_streamp strm, |
994 | int bits, |
995 | int value)) |
996 | { |
997 | if (!g_ZWRAP_useZSTDcompression) |
998 | return deflatePrime(strm, bits, value); |
999 | return ZWRAPC_finishWithErrorMsg(strm, "deflatePrime is not supported!"); |
1000 | } |
1001 | |
1002 | |
1003 | ZEXTERN int ZEXPORT z_deflateSetHeader _Z_OF((z_streamp strm, |
1004 | gz_headerp head)) |
1005 | { |
1006 | if (!g_ZWRAP_useZSTDcompression) |
1007 | return deflateSetHeader(strm, head); |
1008 | return ZWRAPC_finishWithErrorMsg(strm, "deflateSetHeader is not supported!"); |
1009 | } |
1010 | |
1011 | |
1012 | |
1013 | |
1014 | /* Advanced decompression functions */ |
1015 | #if ZLIB_VERNUM >= 0x1280 |
1016 | ZEXTERN int ZEXPORT z_inflateGetDictionary _Z_OF((z_streamp strm, |
1017 | Bytef *dictionary, |
1018 | uInt *dictLength)) |
1019 | { |
1020 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1021 | return inflateGetDictionary(strm, dictionary, dictLength); |
1022 | return ZWRAPD_finishWithErrorMsg(strm, "inflateGetDictionary is not supported!"); |
1023 | } |
1024 | #endif |
1025 | |
1026 | |
1027 | ZEXTERN int ZEXPORT z_inflateCopy _Z_OF((z_streamp dest, |
1028 | z_streamp source)) |
1029 | { |
1030 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !source->reserved) |
1031 | return inflateCopy(dest, source); |
1032 | return ZWRAPD_finishWithErrorMsg(source, "inflateCopy is not supported!"); |
1033 | } |
1034 | |
1035 | |
1036 | #if ZLIB_VERNUM >= 0x1240 |
1037 | ZEXTERN long ZEXPORT z_inflateMark _Z_OF((z_streamp strm)) |
1038 | { |
1039 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1040 | return inflateMark(strm); |
1041 | return ZWRAPD_finishWithErrorMsg(strm, "inflateMark is not supported!"); |
1042 | } |
1043 | #endif |
1044 | |
1045 | |
1046 | ZEXTERN int ZEXPORT z_inflatePrime _Z_OF((z_streamp strm, |
1047 | int bits, |
1048 | int value)) |
1049 | { |
1050 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1051 | return inflatePrime(strm, bits, value); |
1052 | return ZWRAPD_finishWithErrorMsg(strm, "inflatePrime is not supported!"); |
1053 | } |
1054 | |
1055 | |
1056 | ZEXTERN int ZEXPORT z_inflateGetHeader _Z_OF((z_streamp strm, |
1057 | gz_headerp head)) |
1058 | { |
1059 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1060 | return inflateGetHeader(strm, head); |
1061 | return ZWRAPD_finishWithErrorMsg(strm, "inflateGetHeader is not supported!"); |
1062 | } |
1063 | |
1064 | |
1065 | ZEXTERN int ZEXPORT z_inflateBackInit_ _Z_OF((z_streamp strm, int windowBits, |
1066 | unsigned char FAR *window, |
1067 | const char *version, |
1068 | int stream_size)) |
1069 | { |
1070 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1071 | return inflateBackInit_(strm, windowBits, window, version, stream_size); |
1072 | return ZWRAPD_finishWithErrorMsg(strm, "inflateBackInit is not supported!"); |
1073 | } |
1074 | |
1075 | |
1076 | ZEXTERN int ZEXPORT z_inflateBack _Z_OF((z_streamp strm, |
1077 | in_func in, void FAR *in_desc, |
1078 | out_func out, void FAR *out_desc)) |
1079 | { |
1080 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1081 | return inflateBack(strm, in, in_desc, out, out_desc); |
1082 | return ZWRAPD_finishWithErrorMsg(strm, "inflateBack is not supported!"); |
1083 | } |
1084 | |
1085 | |
1086 | ZEXTERN int ZEXPORT z_inflateBackEnd _Z_OF((z_streamp strm)) |
1087 | { |
1088 | if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) |
1089 | return inflateBackEnd(strm); |
1090 | return ZWRAPD_finishWithErrorMsg(strm, "inflateBackEnd is not supported!"); |
1091 | } |
1092 | |
1093 | |
1094 | ZEXTERN uLong ZEXPORT z_zlibCompileFlags _Z_OF((void)) { return zlibCompileFlags(); } |
1095 | |
1096 | |
1097 | |
1098 | /* === utility functions === */ |
1099 | #ifndef Z_SOLO |
1100 | |
1101 | ZEXTERN int ZEXPORT z_compress _Z_OF((Bytef *dest, uLongf *destLen, |
1102 | const Bytef *source, uLong sourceLen)) |
1103 | { |
1104 | if (!g_ZWRAP_useZSTDcompression) |
1105 | return compress(dest, destLen, source, sourceLen); |
1106 | |
1107 | { size_t dstCapacity = *destLen; |
1108 | size_t const cSize = ZSTD_compress(dest, dstCapacity, |
1109 | source, sourceLen, |
1110 | ZWRAP_DEFAULT_CLEVEL); |
1111 | LOG_WRAPPERD("z_compress sourceLen=%d dstCapacity=%d\n", |
1112 | (int)sourceLen, (int)dstCapacity); |
1113 | if (ZSTD_isError(cSize)) return Z_STREAM_ERROR; |
1114 | *destLen = cSize; |
1115 | } |
1116 | return Z_OK; |
1117 | } |
1118 | |
1119 | |
1120 | ZEXTERN int ZEXPORT z_compress2 _Z_OF((Bytef *dest, uLongf *destLen, |
1121 | const Bytef *source, uLong sourceLen, |
1122 | int level)) |
1123 | { |
1124 | if (!g_ZWRAP_useZSTDcompression) |
1125 | return compress2(dest, destLen, source, sourceLen, level); |
1126 | |
1127 | { size_t dstCapacity = *destLen; |
1128 | size_t const cSize = ZSTD_compress(dest, dstCapacity, source, sourceLen, level); |
1129 | if (ZSTD_isError(cSize)) return Z_STREAM_ERROR; |
1130 | *destLen = cSize; |
1131 | } |
1132 | return Z_OK; |
1133 | } |
1134 | |
1135 | |
1136 | ZEXTERN uLong ZEXPORT z_compressBound _Z_OF((uLong sourceLen)) |
1137 | { |
1138 | if (!g_ZWRAP_useZSTDcompression) |
1139 | return compressBound(sourceLen); |
1140 | |
1141 | return ZSTD_compressBound(sourceLen); |
1142 | } |
1143 | |
1144 | |
1145 | ZEXTERN int ZEXPORT z_uncompress _Z_OF((Bytef *dest, uLongf *destLen, |
1146 | const Bytef *source, uLong sourceLen)) |
1147 | { |
1148 | if (!ZSTD_isFrame(source, sourceLen)) |
1149 | return uncompress(dest, destLen, source, sourceLen); |
1150 | |
1151 | { size_t dstCapacity = *destLen; |
1152 | size_t const dSize = ZSTD_decompress(dest, dstCapacity, source, sourceLen); |
1153 | if (ZSTD_isError(dSize)) return Z_STREAM_ERROR; |
1154 | *destLen = dSize; |
1155 | } |
1156 | return Z_OK; |
1157 | } |
1158 | |
1159 | #endif /* !Z_SOLO */ |
1160 | |
1161 | |
1162 | /* checksum functions */ |
1163 | |
1164 | ZEXTERN uLong ZEXPORT z_adler32 _Z_OF((uLong adler, const Bytef *buf, uInt len)) |
1165 | { |
1166 | return adler32(adler, buf, len); |
1167 | } |
1168 | |
1169 | ZEXTERN uLong ZEXPORT z_crc32 _Z_OF((uLong crc, const Bytef *buf, uInt len)) |
1170 | { |
1171 | return crc32(crc, buf, len); |
1172 | } |
1173 | |
1174 | |
1175 | #if ZLIB_VERNUM >= 0x12B0 |
1176 | ZEXTERN uLong ZEXPORT z_adler32_z _Z_OF((uLong adler, const Bytef *buf, z_size_t len)) |
1177 | { |
1178 | return adler32_z(adler, buf, len); |
1179 | } |
1180 | |
1181 | ZEXTERN uLong ZEXPORT z_crc32_z _Z_OF((uLong crc, const Bytef *buf, z_size_t len)) |
1182 | { |
1183 | return crc32_z(crc, buf, len); |
1184 | } |
1185 | #endif |
1186 | |
1187 | |
1188 | #if ZLIB_VERNUM >= 0x1270 |
1189 | ZEXTERN const z_crc_t FAR * ZEXPORT z_get_crc_table _Z_OF((void)) |
1190 | { |
1191 | return get_crc_table(); |
1192 | } |
1193 | #endif |
1194 | |
1195 | /* Error function */ |
1196 | ZEXTERN const char * ZEXPORT z_zError _Z_OF((int err)) |
1197 | { |
1198 | /* Just use zlib Error function */ |
1199 | return zError(err); |
1200 | } |