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[pcsx_rearmed.git] / deps / libchdr / deps / zstd-1.5.5 / zlibWrapper / zstd_zlibwrapper.c
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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
49static 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
59static 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
74static 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 === */
86static int g_ZWRAP_useZSTDcompression = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */
87
88void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; }
89
90int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; }
91
92
93
94static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO;
95
96void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; }
97
98ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; }
99
100
101
102const char * zstdVersion(void) { return ZSTD_VERSION_STRING; }
103
104ZEXTERN const char * ZEXPORT z_zlibVersion _Z_OF((void)) { return zlibVersion(); }
105
106static 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
114static 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
121static 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
128static 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
140static 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 === */
153typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t;
154
155typedef 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
172static 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
181static 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
202static 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
229static 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
238static 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
248int 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
258static struct internal_state* convert_into_sis(void* ptr)
259{
260 return (struct internal_state*) ptr;
261}
262
263ZEXTERN 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
290ZEXTERN 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
302int 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
322ZEXTERN 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
337ZEXTERN 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
362ZEXTERN 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
468ZEXTERN 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
486ZEXTERN 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
496ZEXTERN 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
514typedef enum { ZWRAP_ZLIB_STREAM, ZWRAP_ZSTD_STREAM, ZWRAP_UNKNOWN_STREAM } ZWRAP_stream_type;
515
516typedef 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
534static void ZWRAP_initDCtx(ZWRAP_DCtx* zwd)
535{
536 zwd->errorCount = 0;
537 zwd->outBuffer.pos = 0;
538 zwd->outBuffer.size = 0;
539}
540
541static 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
562static 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
572int ZWRAP_isUsingZSTDdecompression(z_streamp strm)
573{
574 if (strm == NULL) return 0;
575 return (strm->reserved == ZWRAP_ZSTD_STREAM);
576}
577
578
579static 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
587static 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
597ZEXTERN 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
626ZEXTERN 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
644int 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
663ZEXTERN 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
681ZEXTERN 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
699ZEXTERN 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
735ZEXTERN 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
926error:
927 return ZWRAPD_finishWithError(zwd, strm, 0);
928}
929
930
931ZEXTERN 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
948ZEXTERN 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 */
960ZEXTERN 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
969ZEXTERN 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
982ZEXTERN 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
993ZEXTERN 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
1003ZEXTERN 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
1016ZEXTERN 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
1027ZEXTERN 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
1037ZEXTERN 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
1046ZEXTERN 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
1056ZEXTERN 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
1065ZEXTERN 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
1076ZEXTERN 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
1086ZEXTERN 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
1094ZEXTERN uLong ZEXPORT z_zlibCompileFlags _Z_OF((void)) { return zlibCompileFlags(); }
1095
1096
1097
1098 /* === utility functions === */
1099#ifndef Z_SOLO
1100
1101ZEXTERN 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
1120ZEXTERN 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
1136ZEXTERN 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
1145ZEXTERN 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
1164ZEXTERN uLong ZEXPORT z_adler32 _Z_OF((uLong adler, const Bytef *buf, uInt len))
1165{
1166 return adler32(adler, buf, len);
1167}
1168
1169ZEXTERN 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
1176ZEXTERN 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
1181ZEXTERN 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
1189ZEXTERN 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 */
1196ZEXTERN const char * ZEXPORT z_zError _Z_OF((int err))
1197{
1198 /* Just use zlib Error function */
1199 return zError(err);
1200}
ARM optimized PCSX fork