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
13 /* *************************************
14 * Dependencies
15 ***************************************/
16 #define ZSTD_DISABLE_DEPRECATE_WARNINGS /* suppress warning on ZSTD_initDStream_usingDict */
17 #include "../zstd.h" /* ZSTD_CStream, ZSTD_DStream, ZSTDLIB_API */
18 #define ZBUFF_STATIC_LINKING_ONLY
19 #include "zbuff.h"
20
21
ZBUFF_createDCtx(void)22 ZBUFF_DCtx* ZBUFF_createDCtx(void)
23 {
24 return ZSTD_createDStream();
25 }
26
ZBUFF_createDCtx_advanced(ZSTD_customMem customMem)27 ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem)
28 {
29 return ZSTD_createDStream_advanced(customMem);
30 }
31
ZBUFF_freeDCtx(ZBUFF_DCtx * zbd)32 size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbd)
33 {
34 return ZSTD_freeDStream(zbd);
35 }
36
37
38 /* *** Initialization *** */
39
ZBUFF_decompressInitDictionary(ZBUFF_DCtx * zbd,const void * dict,size_t dictSize)40 size_t ZBUFF_decompressInitDictionary(ZBUFF_DCtx* zbd, const void* dict, size_t dictSize)
41 {
42 return ZSTD_initDStream_usingDict(zbd, dict, dictSize);
43 }
44
ZBUFF_decompressInit(ZBUFF_DCtx * zbd)45 size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbd)
46 {
47 return ZSTD_initDStream(zbd);
48 }
49
50
51 /* *** Decompression *** */
52
ZBUFF_decompressContinue(ZBUFF_DCtx * zbd,void * dst,size_t * dstCapacityPtr,const void * src,size_t * srcSizePtr)53 size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbd,
54 void* dst, size_t* dstCapacityPtr,
55 const void* src, size_t* srcSizePtr)
56 {
57 ZSTD_outBuffer outBuff;
58 ZSTD_inBuffer inBuff;
59 size_t result;
60 outBuff.dst = dst;
61 outBuff.pos = 0;
62 outBuff.size = *dstCapacityPtr;
63 inBuff.src = src;
64 inBuff.pos = 0;
65 inBuff.size = *srcSizePtr;
66 result = ZSTD_decompressStream(zbd, &outBuff, &inBuff);
67 *dstCapacityPtr = outBuff.pos;
68 *srcSizePtr = inBuff.pos;
69 return result;
70 }
71
72
73 /* *************************************
74 * Tool functions
75 ***************************************/
ZBUFF_recommendedDInSize(void)76 size_t ZBUFF_recommendedDInSize(void) { return ZSTD_DStreamInSize(); }
ZBUFF_recommendedDOutSize(void)77 size_t ZBUFF_recommendedDOutSize(void) { return ZSTD_DStreamOutSize(); }
78