Mercurial > hg
annotate contrib/python-zstandard/zstd/decompress/zstd_decompress.c @ 30822:b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Commit 63c68d6f5fc8de4afd9bde81b13b537beb4e47e8 from
https://github.com/indygreg/python-zstandard is imported without
modifications (other than removing unwanted files).
This includes minor performance and feature improvements. It also
changes the vendored zstd library from 1.1.1 to 1.1.2.
# no-check-commit
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 14 Jan 2017 19:41:43 -0800 |
parents | 2e484bdea8c4 |
children | c32454d69b85 |
rev | line source |
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1 /** |
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2 * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. |
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3 * All rights reserved. |
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4 * |
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5 * This source code is licensed under the BSD-style license found in the |
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6 * LICENSE file in the root directory of this source tree. An additional grant |
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7 * of patent rights can be found in the PATENTS file in the same directory. |
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8 */ |
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9 |
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10 |
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11 /* *************************************************************** |
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12 * Tuning parameters |
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13 *****************************************************************/ |
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14 /*! |
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15 * HEAPMODE : |
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16 * Select how default decompression function ZSTD_decompress() will allocate memory, |
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17 * in memory stack (0), or in memory heap (1, requires malloc()) |
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18 */ |
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19 #ifndef ZSTD_HEAPMODE |
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20 # define ZSTD_HEAPMODE 1 |
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21 #endif |
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22 |
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23 /*! |
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24 * LEGACY_SUPPORT : |
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25 * if set to 1, ZSTD_decompress() can decode older formats (v0.1+) |
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26 */ |
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27 #ifndef ZSTD_LEGACY_SUPPORT |
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28 # define ZSTD_LEGACY_SUPPORT 0 |
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29 #endif |
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30 |
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31 /*! |
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32 * MAXWINDOWSIZE_DEFAULT : |
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33 * maximum window size accepted by DStream, by default. |
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34 * Frames requiring more memory will be rejected. |
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35 */ |
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36 #ifndef ZSTD_MAXWINDOWSIZE_DEFAULT |
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37 # define ZSTD_MAXWINDOWSIZE_DEFAULT ((1 << ZSTD_WINDOWLOG_MAX) + 1) /* defined within zstd.h */ |
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38 #endif |
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39 |
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40 |
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41 /*-******************************************************* |
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42 * Dependencies |
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43 *********************************************************/ |
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44 #include <string.h> /* memcpy, memmove, memset */ |
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45 #include "mem.h" /* low level memory routines */ |
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46 #define XXH_STATIC_LINKING_ONLY /* XXH64_state_t */ |
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47 #include "xxhash.h" /* XXH64_* */ |
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48 #define FSE_STATIC_LINKING_ONLY |
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49 #include "fse.h" |
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50 #define HUF_STATIC_LINKING_ONLY |
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51 #include "huf.h" |
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52 #include "zstd_internal.h" |
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53 |
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54 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) |
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55 # include "zstd_legacy.h" |
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56 #endif |
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57 |
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58 |
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59 #if defined(_MSC_VER) |
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60 # include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ |
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61 # define ZSTD_PREFETCH(ptr) _mm_prefetch((const char*)ptr, _MM_HINT_T0) |
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62 #elif defined(__GNUC__) |
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63 # define ZSTD_PREFETCH(ptr) __builtin_prefetch(ptr, 0, 0) |
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64 #else |
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65 # define ZSTD_PREFETCH(ptr) /* disabled */ |
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66 #endif |
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67 |
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68 /*-************************************* |
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69 * Macros |
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70 ***************************************/ |
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71 #define ZSTD_isError ERR_isError /* for inlining */ |
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72 #define FSE_isError ERR_isError |
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73 #define HUF_isError ERR_isError |
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74 |
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75 |
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76 /*_******************************************************* |
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77 * Memory operations |
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78 **********************************************************/ |
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79 static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); } |
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80 |
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81 |
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82 /*-************************************************************* |
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83 * Context management |
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84 ***************************************************************/ |
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85 typedef enum { ZSTDds_getFrameHeaderSize, ZSTDds_decodeFrameHeader, |
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86 ZSTDds_decodeBlockHeader, ZSTDds_decompressBlock, |
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87 ZSTDds_decompressLastBlock, ZSTDds_checkChecksum, |
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88 ZSTDds_decodeSkippableHeader, ZSTDds_skipFrame } ZSTD_dStage; |
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89 |
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90 struct ZSTD_DCtx_s |
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91 { |
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92 const FSE_DTable* LLTptr; |
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93 const FSE_DTable* MLTptr; |
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94 const FSE_DTable* OFTptr; |
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95 const HUF_DTable* HUFptr; |
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96 FSE_DTable LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)]; |
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97 FSE_DTable OFTable[FSE_DTABLE_SIZE_U32(OffFSELog)]; |
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98 FSE_DTable MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)]; |
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99 HUF_DTable hufTable[HUF_DTABLE_SIZE(HufLog)]; /* can accommodate HUF_decompress4X */ |
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100 const void* previousDstEnd; |
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101 const void* base; |
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102 const void* vBase; |
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103 const void* dictEnd; |
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104 size_t expected; |
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105 U32 rep[ZSTD_REP_NUM]; |
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106 ZSTD_frameParams fParams; |
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107 blockType_e bType; /* used in ZSTD_decompressContinue(), to transfer blockType between header decoding and block decoding stages */ |
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108 ZSTD_dStage stage; |
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109 U32 litEntropy; |
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110 U32 fseEntropy; |
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111 XXH64_state_t xxhState; |
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112 size_t headerSize; |
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113 U32 dictID; |
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114 const BYTE* litPtr; |
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115 ZSTD_customMem customMem; |
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116 size_t litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
117 size_t rleSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
118 BYTE litBuffer[ZSTD_BLOCKSIZE_ABSOLUTEMAX + WILDCOPY_OVERLENGTH]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
119 BYTE headerBuffer[ZSTD_FRAMEHEADERSIZE_MAX]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
120 }; /* typedef'd to ZSTD_DCtx within "zstd.h" */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
121 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
122 size_t ZSTD_sizeof_DCtx (const ZSTD_DCtx* dctx) { return (dctx==NULL) ? 0 : sizeof(ZSTD_DCtx); } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
123 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
124 size_t ZSTD_estimateDCtxSize(void) { return sizeof(ZSTD_DCtx); } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
125 |
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zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
126 size_t ZSTD_decompressBegin(ZSTD_DCtx* dctx) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
127 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
128 dctx->expected = ZSTD_frameHeaderSize_prefix; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
129 dctx->stage = ZSTDds_getFrameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
130 dctx->previousDstEnd = NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
131 dctx->base = NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
132 dctx->vBase = NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
133 dctx->dictEnd = NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
134 dctx->hufTable[0] = (HUF_DTable)((HufLog)*0x1000001); /* cover both little and big endian */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
135 dctx->litEntropy = dctx->fseEntropy = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
136 dctx->dictID = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
137 MEM_STATIC_ASSERT(sizeof(dctx->rep) == sizeof(repStartValue)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
138 memcpy(dctx->rep, repStartValue, sizeof(repStartValue)); /* initial repcodes */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
139 dctx->LLTptr = dctx->LLTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
140 dctx->MLTptr = dctx->MLTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
141 dctx->OFTptr = dctx->OFTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
142 dctx->HUFptr = dctx->hufTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
143 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
144 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
145 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
146 ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
147 { |
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zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
148 ZSTD_DCtx* dctx; |
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zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
149 |
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zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
150 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
151 if (!customMem.customAlloc || !customMem.customFree) return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
152 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
153 dctx = (ZSTD_DCtx*)ZSTD_malloc(sizeof(ZSTD_DCtx), customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
154 if (!dctx) return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
155 memcpy(&dctx->customMem, &customMem, sizeof(customMem)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
156 ZSTD_decompressBegin(dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
157 return dctx; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
158 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
159 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
160 ZSTD_DCtx* ZSTD_createDCtx(void) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
161 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
162 return ZSTD_createDCtx_advanced(defaultCustomMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
163 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
164 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
165 size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
166 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
167 if (dctx==NULL) return 0; /* support free on NULL */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
168 ZSTD_free(dctx, dctx->customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
169 return 0; /* reserved as a potential error code in the future */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
170 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
171 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
172 void ZSTD_copyDCtx(ZSTD_DCtx* dstDCtx, const ZSTD_DCtx* srcDCtx) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
173 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
174 size_t const workSpaceSize = (ZSTD_BLOCKSIZE_ABSOLUTEMAX+WILDCOPY_OVERLENGTH) + ZSTD_frameHeaderSize_max; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
175 memcpy(dstDCtx, srcDCtx, sizeof(ZSTD_DCtx) - workSpaceSize); /* no need to copy workspace */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
176 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
177 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
178 static void ZSTD_refDCtx(ZSTD_DCtx* dstDCtx, const ZSTD_DCtx* srcDCtx) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
179 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
180 ZSTD_decompressBegin(dstDCtx); /* init */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
181 if (srcDCtx) { /* support refDCtx on NULL */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
182 dstDCtx->dictEnd = srcDCtx->dictEnd; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
183 dstDCtx->vBase = srcDCtx->vBase; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
184 dstDCtx->base = srcDCtx->base; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
185 dstDCtx->previousDstEnd = srcDCtx->previousDstEnd; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
186 dstDCtx->dictID = srcDCtx->dictID; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
187 dstDCtx->litEntropy = srcDCtx->litEntropy; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
188 dstDCtx->fseEntropy = srcDCtx->fseEntropy; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
189 dstDCtx->LLTptr = srcDCtx->LLTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
190 dstDCtx->MLTptr = srcDCtx->MLTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
191 dstDCtx->OFTptr = srcDCtx->OFTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
192 dstDCtx->HUFptr = srcDCtx->hufTable; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
193 dstDCtx->rep[0] = srcDCtx->rep[0]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
194 dstDCtx->rep[1] = srcDCtx->rep[1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
195 dstDCtx->rep[2] = srcDCtx->rep[2]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
196 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
197 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
198 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
199 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
200 /*-************************************************************* |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
201 * Decompression section |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
202 ***************************************************************/ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
203 |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
204 /*! ZSTD_isFrame() : |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
205 * Tells if the content of `buffer` starts with a valid Frame Identifier. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
206 * Note : Frame Identifier is 4 bytes. If `size < 4`, @return will always be 0. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
207 * Note 2 : Legacy Frame Identifiers are considered valid only if Legacy Support is enabled. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
208 * Note 3 : Skippable Frame Identifiers are considered valid. */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
209 unsigned ZSTD_isFrame(const void* buffer, size_t size) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
210 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
211 if (size < 4) return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
212 { U32 const magic = MEM_readLE32(buffer); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
213 if (magic == ZSTD_MAGICNUMBER) return 1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
214 if ((magic & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) return 1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
215 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
216 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
217 if (ZSTD_isLegacy(buffer, size)) return 1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
218 #endif |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
219 return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
220 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
221 |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
222 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
223 /** ZSTD_frameHeaderSize() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
224 * srcSize must be >= ZSTD_frameHeaderSize_prefix. |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
225 * @return : size of the Frame Header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
226 static size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
227 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
228 if (srcSize < ZSTD_frameHeaderSize_prefix) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
229 { BYTE const fhd = ((const BYTE*)src)[4]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
230 U32 const dictID= fhd & 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
231 U32 const singleSegment = (fhd >> 5) & 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
232 U32 const fcsId = fhd >> 6; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
233 return ZSTD_frameHeaderSize_prefix + !singleSegment + ZSTD_did_fieldSize[dictID] + ZSTD_fcs_fieldSize[fcsId] |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
234 + (singleSegment && !fcsId); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
235 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
236 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
237 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
238 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
239 /** ZSTD_getFrameParams() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
240 * decode Frame Header, or require larger `srcSize`. |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
241 * @return : 0, `fparamsPtr` is correctly filled, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
242 * >0, `srcSize` is too small, result is expected `srcSize`, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
243 * or an error code, which can be tested using ZSTD_isError() */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
244 size_t ZSTD_getFrameParams(ZSTD_frameParams* fparamsPtr, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
245 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
246 const BYTE* ip = (const BYTE*)src; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
247 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
248 if (srcSize < ZSTD_frameHeaderSize_prefix) return ZSTD_frameHeaderSize_prefix; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
249 if (MEM_readLE32(src) != ZSTD_MAGICNUMBER) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
250 if ((MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
251 if (srcSize < ZSTD_skippableHeaderSize) return ZSTD_skippableHeaderSize; /* magic number + skippable frame length */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
252 memset(fparamsPtr, 0, sizeof(*fparamsPtr)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
253 fparamsPtr->frameContentSize = MEM_readLE32((const char *)src + 4); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
254 fparamsPtr->windowSize = 0; /* windowSize==0 means a frame is skippable */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
255 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
256 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
257 return ERROR(prefix_unknown); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
258 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
259 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
260 /* ensure there is enough `srcSize` to fully read/decode frame header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
261 { size_t const fhsize = ZSTD_frameHeaderSize(src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
262 if (srcSize < fhsize) return fhsize; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
263 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
264 { BYTE const fhdByte = ip[4]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
265 size_t pos = 5; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
266 U32 const dictIDSizeCode = fhdByte&3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
267 U32 const checksumFlag = (fhdByte>>2)&1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
268 U32 const singleSegment = (fhdByte>>5)&1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
269 U32 const fcsID = fhdByte>>6; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
270 U32 const windowSizeMax = 1U << ZSTD_WINDOWLOG_MAX; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
271 U32 windowSize = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
272 U32 dictID = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
273 U64 frameContentSize = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
274 if ((fhdByte & 0x08) != 0) return ERROR(frameParameter_unsupported); /* reserved bits, which must be zero */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
275 if (!singleSegment) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
276 BYTE const wlByte = ip[pos++]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
277 U32 const windowLog = (wlByte >> 3) + ZSTD_WINDOWLOG_ABSOLUTEMIN; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
278 if (windowLog > ZSTD_WINDOWLOG_MAX) return ERROR(frameParameter_windowTooLarge); /* avoids issue with 1 << windowLog */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
279 windowSize = (1U << windowLog); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
280 windowSize += (windowSize >> 3) * (wlByte&7); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
281 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
282 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
283 switch(dictIDSizeCode) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
284 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
285 default: /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
286 case 0 : break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
287 case 1 : dictID = ip[pos]; pos++; break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
288 case 2 : dictID = MEM_readLE16(ip+pos); pos+=2; break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
289 case 3 : dictID = MEM_readLE32(ip+pos); pos+=4; break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
290 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
291 switch(fcsID) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
292 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
293 default: /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
294 case 0 : if (singleSegment) frameContentSize = ip[pos]; break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
295 case 1 : frameContentSize = MEM_readLE16(ip+pos)+256; break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
296 case 2 : frameContentSize = MEM_readLE32(ip+pos); break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
297 case 3 : frameContentSize = MEM_readLE64(ip+pos); break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
298 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
299 if (!windowSize) windowSize = (U32)frameContentSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
300 if (windowSize > windowSizeMax) return ERROR(frameParameter_windowTooLarge); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
301 fparamsPtr->frameContentSize = frameContentSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
302 fparamsPtr->windowSize = windowSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
303 fparamsPtr->dictID = dictID; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
304 fparamsPtr->checksumFlag = checksumFlag; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
305 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
306 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
307 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
308 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
309 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
310 /** ZSTD_getDecompressedSize() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
311 * compatible with legacy mode |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
312 * @return : decompressed size if known, 0 otherwise |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
313 note : 0 can mean any of the following : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
314 - decompressed size is not present within frame header |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
315 - frame header unknown / not supported |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
316 - frame header not complete (`srcSize` too small) */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
317 unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
318 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
319 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
320 if (ZSTD_isLegacy(src, srcSize)) return ZSTD_getDecompressedSize_legacy(src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
321 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
322 { ZSTD_frameParams fparams; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
323 size_t const frResult = ZSTD_getFrameParams(&fparams, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
324 if (frResult!=0) return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
325 return fparams.frameContentSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
326 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
327 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
328 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
329 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
330 /** ZSTD_decodeFrameHeader() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
331 * `headerSize` must be the size provided by ZSTD_frameHeaderSize(). |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
332 * @return : 0 if success, or an error code, which can be tested using ZSTD_isError() */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
333 static size_t ZSTD_decodeFrameHeader(ZSTD_DCtx* dctx, const void* src, size_t headerSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
334 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
335 size_t const result = ZSTD_getFrameParams(&(dctx->fParams), src, headerSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
336 if (ZSTD_isError(result)) return result; /* invalid header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
337 if (result>0) return ERROR(srcSize_wrong); /* headerSize too small */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
338 if (dctx->fParams.dictID && (dctx->dictID != dctx->fParams.dictID)) return ERROR(dictionary_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
339 if (dctx->fParams.checksumFlag) XXH64_reset(&dctx->xxhState, 0); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
340 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
341 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
342 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
343 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
344 typedef struct |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
345 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
346 blockType_e blockType; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
347 U32 lastBlock; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
348 U32 origSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
349 } blockProperties_t; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
350 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
351 /*! ZSTD_getcBlockSize() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
352 * Provides the size of compressed block from block header `src` */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
353 size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
354 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
355 if (srcSize < ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
356 { U32 const cBlockHeader = MEM_readLE24(src); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
357 U32 const cSize = cBlockHeader >> 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
358 bpPtr->lastBlock = cBlockHeader & 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
359 bpPtr->blockType = (blockType_e)((cBlockHeader >> 1) & 3); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
360 bpPtr->origSize = cSize; /* only useful for RLE */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
361 if (bpPtr->blockType == bt_rle) return 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
362 if (bpPtr->blockType == bt_reserved) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
363 return cSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
364 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
365 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
366 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
367 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
368 static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
369 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
370 if (srcSize > dstCapacity) return ERROR(dstSize_tooSmall); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
371 memcpy(dst, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
372 return srcSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
373 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
374 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
375 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
376 static size_t ZSTD_setRleBlock(void* dst, size_t dstCapacity, const void* src, size_t srcSize, size_t regenSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
377 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
378 if (srcSize != 1) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
379 if (regenSize > dstCapacity) return ERROR(dstSize_tooSmall); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
380 memset(dst, *(const BYTE*)src, regenSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
381 return regenSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
382 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
383 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
384 /*! ZSTD_decodeLiteralsBlock() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
385 @return : nb of bytes read from src (< srcSize ) */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
386 size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
387 const void* src, size_t srcSize) /* note : srcSize < BLOCKSIZE */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
388 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
389 if (srcSize < MIN_CBLOCK_SIZE) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
390 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
391 { const BYTE* const istart = (const BYTE*) src; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
392 symbolEncodingType_e const litEncType = (symbolEncodingType_e)(istart[0] & 3); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
393 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
394 switch(litEncType) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
395 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
396 case set_repeat: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
397 if (dctx->litEntropy==0) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
398 /* fall-through */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
399 case set_compressed: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
400 if (srcSize < 5) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
401 { size_t lhSize, litSize, litCSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
402 U32 singleStream=0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
403 U32 const lhlCode = (istart[0] >> 2) & 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
404 U32 const lhc = MEM_readLE32(istart); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
405 switch(lhlCode) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
406 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
407 case 0: case 1: default: /* note : default is impossible, since lhlCode into [0..3] */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
408 /* 2 - 2 - 10 - 10 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
409 singleStream = !lhlCode; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
410 lhSize = 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
411 litSize = (lhc >> 4) & 0x3FF; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
412 litCSize = (lhc >> 14) & 0x3FF; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
413 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
414 case 2: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
415 /* 2 - 2 - 14 - 14 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
416 lhSize = 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
417 litSize = (lhc >> 4) & 0x3FFF; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
418 litCSize = lhc >> 18; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
419 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
420 case 3: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
421 /* 2 - 2 - 18 - 18 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
422 lhSize = 5; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
423 litSize = (lhc >> 4) & 0x3FFFF; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
424 litCSize = (lhc >> 22) + (istart[4] << 10); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
425 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
426 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
427 if (litSize > ZSTD_BLOCKSIZE_ABSOLUTEMAX) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
428 if (litCSize + lhSize > srcSize) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
429 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
430 if (HUF_isError((litEncType==set_repeat) ? |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
431 ( singleStream ? |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
432 HUF_decompress1X_usingDTable(dctx->litBuffer, litSize, istart+lhSize, litCSize, dctx->HUFptr) : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
433 HUF_decompress4X_usingDTable(dctx->litBuffer, litSize, istart+lhSize, litCSize, dctx->HUFptr) ) : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
434 ( singleStream ? |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
435 HUF_decompress1X2_DCtx(dctx->hufTable, dctx->litBuffer, litSize, istart+lhSize, litCSize) : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
436 HUF_decompress4X_hufOnly (dctx->hufTable, dctx->litBuffer, litSize, istart+lhSize, litCSize)) )) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
437 return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
438 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
439 dctx->litPtr = dctx->litBuffer; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
440 dctx->litSize = litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
441 dctx->litEntropy = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
442 if (litEncType==set_compressed) dctx->HUFptr = dctx->hufTable; |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
443 memset(dctx->litBuffer + dctx->litSize, 0, WILDCOPY_OVERLENGTH); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
444 return litCSize + lhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
445 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
446 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
447 case set_basic: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
448 { size_t litSize, lhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
449 U32 const lhlCode = ((istart[0]) >> 2) & 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
450 switch(lhlCode) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
451 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
452 case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
453 lhSize = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
454 litSize = istart[0] >> 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
455 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
456 case 1: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
457 lhSize = 2; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
458 litSize = MEM_readLE16(istart) >> 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
459 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
460 case 3: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
461 lhSize = 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
462 litSize = MEM_readLE24(istart) >> 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
463 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
464 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
465 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
466 if (lhSize+litSize+WILDCOPY_OVERLENGTH > srcSize) { /* risk reading beyond src buffer with wildcopy */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
467 if (litSize+lhSize > srcSize) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
468 memcpy(dctx->litBuffer, istart+lhSize, litSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
469 dctx->litPtr = dctx->litBuffer; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
470 dctx->litSize = litSize; |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
471 memset(dctx->litBuffer + dctx->litSize, 0, WILDCOPY_OVERLENGTH); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
472 return lhSize+litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
473 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
474 /* direct reference into compressed stream */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
475 dctx->litPtr = istart+lhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
476 dctx->litSize = litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
477 return lhSize+litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
478 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
479 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
480 case set_rle: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
481 { U32 const lhlCode = ((istart[0]) >> 2) & 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
482 size_t litSize, lhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
483 switch(lhlCode) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
484 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
485 case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
486 lhSize = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
487 litSize = istart[0] >> 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
488 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
489 case 1: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
490 lhSize = 2; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
491 litSize = MEM_readLE16(istart) >> 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
492 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
493 case 3: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
494 lhSize = 3; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
495 litSize = MEM_readLE24(istart) >> 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
496 if (srcSize<4) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need lhSize+1 = 4 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
497 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
498 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
499 if (litSize > ZSTD_BLOCKSIZE_ABSOLUTEMAX) return ERROR(corruption_detected); |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
500 memset(dctx->litBuffer, istart[lhSize], litSize + WILDCOPY_OVERLENGTH); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
501 dctx->litPtr = dctx->litBuffer; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
502 dctx->litSize = litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
503 return lhSize+1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
504 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
505 default: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
506 return ERROR(corruption_detected); /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
507 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
508 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
509 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
510 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
511 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
512 typedef union { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
513 FSE_decode_t realData; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
514 U32 alignedBy4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
515 } FSE_decode_t4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
516 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
517 static const FSE_decode_t4 LL_defaultDTable[(1<<LL_DEFAULTNORMLOG)+1] = { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
518 { { LL_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
519 { { 0, 0, 4 } }, /* 0 : base, symbol, bits */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
520 { { 16, 0, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
521 { { 32, 1, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
522 { { 0, 3, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
523 { { 0, 4, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
524 { { 0, 6, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
525 { { 0, 7, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
526 { { 0, 9, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
527 { { 0, 10, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
528 { { 0, 12, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
529 { { 0, 14, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
530 { { 0, 16, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
531 { { 0, 18, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
532 { { 0, 19, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
533 { { 0, 21, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
534 { { 0, 22, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
535 { { 0, 24, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
536 { { 32, 25, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
537 { { 0, 26, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
538 { { 0, 27, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
539 { { 0, 29, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
540 { { 0, 31, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
541 { { 32, 0, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
542 { { 0, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
543 { { 0, 2, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
544 { { 32, 4, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
545 { { 0, 5, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
546 { { 32, 7, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
547 { { 0, 8, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
548 { { 32, 10, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
549 { { 0, 11, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
550 { { 0, 13, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
551 { { 32, 16, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
552 { { 0, 17, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
553 { { 32, 19, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
554 { { 0, 20, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
555 { { 32, 22, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
556 { { 0, 23, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
557 { { 0, 25, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
558 { { 16, 25, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
559 { { 32, 26, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
560 { { 0, 28, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
561 { { 0, 30, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
562 { { 48, 0, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
563 { { 16, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
564 { { 32, 2, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
565 { { 32, 3, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
566 { { 32, 5, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
567 { { 32, 6, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
568 { { 32, 8, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
569 { { 32, 9, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
570 { { 32, 11, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
571 { { 32, 12, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
572 { { 0, 15, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
573 { { 32, 17, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
574 { { 32, 18, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
575 { { 32, 20, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
576 { { 32, 21, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
577 { { 32, 23, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
578 { { 32, 24, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
579 { { 0, 35, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
580 { { 0, 34, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
581 { { 0, 33, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
582 { { 0, 32, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
583 }; /* LL_defaultDTable */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
584 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
585 static const FSE_decode_t4 ML_defaultDTable[(1<<ML_DEFAULTNORMLOG)+1] = { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
586 { { ML_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
587 { { 0, 0, 6 } }, /* 0 : base, symbol, bits */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
588 { { 0, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
589 { { 32, 2, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
590 { { 0, 3, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
591 { { 0, 5, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
592 { { 0, 6, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
593 { { 0, 8, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
594 { { 0, 10, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
595 { { 0, 13, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
596 { { 0, 16, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
597 { { 0, 19, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
598 { { 0, 22, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
599 { { 0, 25, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
600 { { 0, 28, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
601 { { 0, 31, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
602 { { 0, 33, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
603 { { 0, 35, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
604 { { 0, 37, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
605 { { 0, 39, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
606 { { 0, 41, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
607 { { 0, 43, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
608 { { 0, 45, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
609 { { 16, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
610 { { 0, 2, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
611 { { 32, 3, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
612 { { 0, 4, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
613 { { 32, 6, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
614 { { 0, 7, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
615 { { 0, 9, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
616 { { 0, 12, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
617 { { 0, 15, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
618 { { 0, 18, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
619 { { 0, 21, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
620 { { 0, 24, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
621 { { 0, 27, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
622 { { 0, 30, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
623 { { 0, 32, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
624 { { 0, 34, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
625 { { 0, 36, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
626 { { 0, 38, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
627 { { 0, 40, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
628 { { 0, 42, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
629 { { 0, 44, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
630 { { 32, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
631 { { 48, 1, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
632 { { 16, 2, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
633 { { 32, 4, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
634 { { 32, 5, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
635 { { 32, 7, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
636 { { 32, 8, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
637 { { 0, 11, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
638 { { 0, 14, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
639 { { 0, 17, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
640 { { 0, 20, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
641 { { 0, 23, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
642 { { 0, 26, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
643 { { 0, 29, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
644 { { 0, 52, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
645 { { 0, 51, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
646 { { 0, 50, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
647 { { 0, 49, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
648 { { 0, 48, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
649 { { 0, 47, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
650 { { 0, 46, 6 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
651 }; /* ML_defaultDTable */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
652 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
653 static const FSE_decode_t4 OF_defaultDTable[(1<<OF_DEFAULTNORMLOG)+1] = { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
654 { { OF_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
655 { { 0, 0, 5 } }, /* 0 : base, symbol, bits */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
656 { { 0, 6, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
657 { { 0, 9, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
658 { { 0, 15, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
659 { { 0, 21, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
660 { { 0, 3, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
661 { { 0, 7, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
662 { { 0, 12, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
663 { { 0, 18, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
664 { { 0, 23, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
665 { { 0, 5, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
666 { { 0, 8, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
667 { { 0, 14, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
668 { { 0, 20, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
669 { { 0, 2, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
670 { { 16, 7, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
671 { { 0, 11, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
672 { { 0, 17, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
673 { { 0, 22, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
674 { { 0, 4, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
675 { { 16, 8, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
676 { { 0, 13, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
677 { { 0, 19, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
678 { { 0, 1, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
679 { { 16, 6, 4 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
680 { { 0, 10, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
681 { { 0, 16, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
682 { { 0, 28, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
683 { { 0, 27, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
684 { { 0, 26, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
685 { { 0, 25, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
686 { { 0, 24, 5 } }, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
687 }; /* OF_defaultDTable */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
688 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
689 /*! ZSTD_buildSeqTable() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
690 @return : nb bytes read from src, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
691 or an error code if it fails, testable with ZSTD_isError() |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
692 */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
693 static size_t ZSTD_buildSeqTable(FSE_DTable* DTableSpace, const FSE_DTable** DTablePtr, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
694 symbolEncodingType_e type, U32 max, U32 maxLog, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
695 const void* src, size_t srcSize, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
696 const FSE_decode_t4* defaultTable, U32 flagRepeatTable) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
697 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
698 const void* const tmpPtr = defaultTable; /* bypass strict aliasing */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
699 switch(type) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
700 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
701 case set_rle : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
702 if (!srcSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
703 if ( (*(const BYTE*)src) > max) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
704 FSE_buildDTable_rle(DTableSpace, *(const BYTE*)src); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
705 *DTablePtr = DTableSpace; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
706 return 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
707 case set_basic : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
708 *DTablePtr = (const FSE_DTable*)tmpPtr; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
709 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
710 case set_repeat: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
711 if (!flagRepeatTable) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
712 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
713 default : /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
714 case set_compressed : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
715 { U32 tableLog; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
716 S16 norm[MaxSeq+1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
717 size_t const headerSize = FSE_readNCount(norm, &max, &tableLog, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
718 if (FSE_isError(headerSize)) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
719 if (tableLog > maxLog) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
720 FSE_buildDTable(DTableSpace, norm, max, tableLog); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
721 *DTablePtr = DTableSpace; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
722 return headerSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
723 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
724 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
725 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
726 size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeqPtr, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
727 const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
728 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
729 const BYTE* const istart = (const BYTE* const)src; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
730 const BYTE* const iend = istart + srcSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
731 const BYTE* ip = istart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
732 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
733 /* check */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
734 if (srcSize < MIN_SEQUENCES_SIZE) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
735 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
736 /* SeqHead */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
737 { int nbSeq = *ip++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
738 if (!nbSeq) { *nbSeqPtr=0; return 1; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
739 if (nbSeq > 0x7F) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
740 if (nbSeq == 0xFF) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
741 if (ip+2 > iend) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
742 nbSeq = MEM_readLE16(ip) + LONGNBSEQ, ip+=2; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
743 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
744 if (ip >= iend) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
745 nbSeq = ((nbSeq-0x80)<<8) + *ip++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
746 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
747 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
748 *nbSeqPtr = nbSeq; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
749 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
750 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
751 /* FSE table descriptors */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
752 if (ip+4 > iend) return ERROR(srcSize_wrong); /* minimum possible size */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
753 { symbolEncodingType_e const LLtype = (symbolEncodingType_e)(*ip >> 6); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
754 symbolEncodingType_e const OFtype = (symbolEncodingType_e)((*ip >> 4) & 3); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
755 symbolEncodingType_e const MLtype = (symbolEncodingType_e)((*ip >> 2) & 3); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
756 ip++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
757 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
758 /* Build DTables */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
759 { size_t const llhSize = ZSTD_buildSeqTable(dctx->LLTable, &dctx->LLTptr, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
760 LLtype, MaxLL, LLFSELog, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
761 ip, iend-ip, LL_defaultDTable, dctx->fseEntropy); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
762 if (ZSTD_isError(llhSize)) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
763 ip += llhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
764 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
765 { size_t const ofhSize = ZSTD_buildSeqTable(dctx->OFTable, &dctx->OFTptr, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
766 OFtype, MaxOff, OffFSELog, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
767 ip, iend-ip, OF_defaultDTable, dctx->fseEntropy); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
768 if (ZSTD_isError(ofhSize)) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
769 ip += ofhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
770 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
771 { size_t const mlhSize = ZSTD_buildSeqTable(dctx->MLTable, &dctx->MLTptr, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
772 MLtype, MaxML, MLFSELog, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
773 ip, iend-ip, ML_defaultDTable, dctx->fseEntropy); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
774 if (ZSTD_isError(mlhSize)) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
775 ip += mlhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
776 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
777 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
778 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
779 return ip-istart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
780 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
781 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
782 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
783 typedef struct { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
784 size_t litLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
785 size_t matchLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
786 size_t offset; |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
787 const BYTE* match; |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
788 } seq_t; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
789 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
790 typedef struct { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
791 BIT_DStream_t DStream; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
792 FSE_DState_t stateLL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
793 FSE_DState_t stateOffb; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
794 FSE_DState_t stateML; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
795 size_t prevOffset[ZSTD_REP_NUM]; |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
796 const BYTE* base; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
797 size_t pos; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
798 iPtrDiff gotoDict; |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
799 } seqState_t; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
800 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
801 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
802 FORCE_NOINLINE |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
803 size_t ZSTD_execSequenceLast7(BYTE* op, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
804 BYTE* const oend, seq_t sequence, |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
805 const BYTE** litPtr, const BYTE* const litLimit, |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
806 const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
807 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
808 BYTE* const oLitEnd = op + sequence.litLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
809 size_t const sequenceLength = sequence.litLength + sequence.matchLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
810 BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
811 BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
812 const BYTE* const iLitEnd = *litPtr + sequence.litLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
813 const BYTE* match = oLitEnd - sequence.offset; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
814 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
815 /* check */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
816 if (oMatchEnd>oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
817 if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
818 if (oLitEnd <= oend_w) return ERROR(GENERIC); /* Precondition */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
819 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
820 /* copy literals */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
821 if (op < oend_w) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
822 ZSTD_wildcopy(op, *litPtr, oend_w - op); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
823 *litPtr += oend_w - op; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
824 op = oend_w; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
825 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
826 while (op < oLitEnd) *op++ = *(*litPtr)++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
827 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
828 /* copy Match */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
829 if (sequence.offset > (size_t)(oLitEnd - base)) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
830 /* offset beyond prefix */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
831 if (sequence.offset > (size_t)(oLitEnd - vBase)) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
832 match = dictEnd - (base-match); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
833 if (match + sequence.matchLength <= dictEnd) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
834 memmove(oLitEnd, match, sequence.matchLength); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
835 return sequenceLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
836 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
837 /* span extDict & currentPrefixSegment */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
838 { size_t const length1 = dictEnd - match; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
839 memmove(oLitEnd, match, length1); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
840 op = oLitEnd + length1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
841 sequence.matchLength -= length1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
842 match = base; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
843 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
844 while (op < oMatchEnd) *op++ = *match++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
845 return sequenceLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
846 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
847 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
848 |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
849 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
850 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
851 static seq_t ZSTD_decodeSequence(seqState_t* seqState) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
852 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
853 seq_t seq; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
854 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
855 U32 const llCode = FSE_peekSymbol(&seqState->stateLL); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
856 U32 const mlCode = FSE_peekSymbol(&seqState->stateML); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
857 U32 const ofCode = FSE_peekSymbol(&seqState->stateOffb); /* <= maxOff, by table construction */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
858 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
859 U32 const llBits = LL_bits[llCode]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
860 U32 const mlBits = ML_bits[mlCode]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
861 U32 const ofBits = ofCode; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
862 U32 const totalBits = llBits+mlBits+ofBits; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
863 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
864 static const U32 LL_base[MaxLL+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
865 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
866 16, 18, 20, 22, 24, 28, 32, 40, 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
867 0x2000, 0x4000, 0x8000, 0x10000 }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
868 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
869 static const U32 ML_base[MaxML+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
870 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
871 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
872 35, 37, 39, 41, 43, 47, 51, 59, 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
873 0x1003, 0x2003, 0x4003, 0x8003, 0x10003 }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
874 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
875 static const U32 OF_base[MaxOff+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
876 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
877 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
878 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
879 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
880 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
881 /* sequence */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
882 { size_t offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
883 if (!ofCode) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
884 offset = 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
885 else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
886 offset = OF_base[ofCode] + BIT_readBitsFast(&seqState->DStream, ofBits); /* <= (ZSTD_WINDOWLOG_MAX-1) bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
887 if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
888 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
889 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
890 if (ofCode <= 1) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
891 offset += (llCode==0); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
892 if (offset) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
893 size_t temp = (offset==3) ? seqState->prevOffset[0] - 1 : seqState->prevOffset[offset]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
894 temp += !temp; /* 0 is not valid; input is corrupted; force offset to 1 */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
895 if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
896 seqState->prevOffset[1] = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
897 seqState->prevOffset[0] = offset = temp; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
898 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
899 offset = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
900 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
901 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
902 seqState->prevOffset[2] = seqState->prevOffset[1]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
903 seqState->prevOffset[1] = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
904 seqState->prevOffset[0] = offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
905 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
906 seq.offset = offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
907 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
908 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
909 seq.matchLength = ML_base[mlCode] + ((mlCode>31) ? BIT_readBitsFast(&seqState->DStream, mlBits) : 0); /* <= 16 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
910 if (MEM_32bits() && (mlBits+llBits>24)) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
911 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
912 seq.litLength = LL_base[llCode] + ((llCode>15) ? BIT_readBitsFast(&seqState->DStream, llBits) : 0); /* <= 16 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
913 if (MEM_32bits() || |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
914 (totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) ) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
915 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
916 /* ANS state update */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
917 FSE_updateState(&seqState->stateLL, &seqState->DStream); /* <= 9 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
918 FSE_updateState(&seqState->stateML, &seqState->DStream); /* <= 9 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
919 if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); /* <= 18 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
920 FSE_updateState(&seqState->stateOffb, &seqState->DStream); /* <= 8 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
921 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
922 return seq; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
923 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
924 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
925 |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
926 FORCE_INLINE |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
927 size_t ZSTD_execSequence(BYTE* op, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
928 BYTE* const oend, seq_t sequence, |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
929 const BYTE** litPtr, const BYTE* const litLimit, |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
930 const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
931 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
932 BYTE* const oLitEnd = op + sequence.litLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
933 size_t const sequenceLength = sequence.litLength + sequence.matchLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
934 BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
935 BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
936 const BYTE* const iLitEnd = *litPtr + sequence.litLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
937 const BYTE* match = oLitEnd - sequence.offset; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
938 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
939 /* check */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
940 if (oMatchEnd>oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
941 if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
942 if (oLitEnd>oend_w) return ZSTD_execSequenceLast7(op, oend, sequence, litPtr, litLimit, base, vBase, dictEnd); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
943 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
944 /* copy Literals */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
945 ZSTD_copy8(op, *litPtr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
946 if (sequence.litLength > 8) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
947 ZSTD_wildcopy(op+8, (*litPtr)+8, sequence.litLength - 8); /* note : since oLitEnd <= oend-WILDCOPY_OVERLENGTH, no risk of overwrite beyond oend */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
948 op = oLitEnd; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
949 *litPtr = iLitEnd; /* update for next sequence */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
950 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
951 /* copy Match */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
952 if (sequence.offset > (size_t)(oLitEnd - base)) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
953 /* offset beyond prefix */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
954 if (sequence.offset > (size_t)(oLitEnd - vBase)) return ERROR(corruption_detected); |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
955 match += (dictEnd-base); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
956 if (match + sequence.matchLength <= dictEnd) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
957 memmove(oLitEnd, match, sequence.matchLength); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
958 return sequenceLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
959 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
960 /* span extDict & currentPrefixSegment */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
961 { size_t const length1 = dictEnd - match; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
962 memmove(oLitEnd, match, length1); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
963 op = oLitEnd + length1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
964 sequence.matchLength -= length1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
965 match = base; |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
966 if (op > oend_w || sequence.matchLength < MINMATCH) { |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
967 U32 i; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
968 for (i = 0; i < sequence.matchLength; ++i) op[i] = match[i]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
969 return sequenceLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
970 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
971 } } |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
972 /* Requirement: op <= oend_w && sequence.matchLength >= MINMATCH */ |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
973 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
974 /* match within prefix */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
975 if (sequence.offset < 8) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
976 /* close range match, overlap */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
977 static const U32 dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
978 static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* substracted */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
979 int const sub2 = dec64table[sequence.offset]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
980 op[0] = match[0]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
981 op[1] = match[1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
982 op[2] = match[2]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
983 op[3] = match[3]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
984 match += dec32table[sequence.offset]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
985 ZSTD_copy4(op+4, match); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
986 match -= sub2; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
987 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
988 ZSTD_copy8(op, match); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
989 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
990 op += 8; match += 8; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
991 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
992 if (oMatchEnd > oend-(16-MINMATCH)) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
993 if (op < oend_w) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
994 ZSTD_wildcopy(op, match, oend_w - op); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
995 match += oend_w - op; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
996 op = oend_w; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
997 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
998 while (op < oMatchEnd) *op++ = *match++; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
999 } else { |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1000 ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8 */ |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1001 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1002 return sequenceLength; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1003 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1004 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1005 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1006 static size_t ZSTD_decompressSequences( |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1007 ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1008 void* dst, size_t maxDstSize, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1009 const void* seqStart, size_t seqSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1010 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1011 const BYTE* ip = (const BYTE*)seqStart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1012 const BYTE* const iend = ip + seqSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1013 BYTE* const ostart = (BYTE* const)dst; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1014 BYTE* const oend = ostart + maxDstSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1015 BYTE* op = ostart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1016 const BYTE* litPtr = dctx->litPtr; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1017 const BYTE* const litEnd = litPtr + dctx->litSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1018 const BYTE* const base = (const BYTE*) (dctx->base); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1019 const BYTE* const vBase = (const BYTE*) (dctx->vBase); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1020 const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1021 int nbSeq; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1022 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1023 /* Build Decoding Tables */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1024 { size_t const seqHSize = ZSTD_decodeSeqHeaders(dctx, &nbSeq, ip, seqSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1025 if (ZSTD_isError(seqHSize)) return seqHSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1026 ip += seqHSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1027 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1028 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1029 /* Regen sequences */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1030 if (nbSeq) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1031 seqState_t seqState; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1032 dctx->fseEntropy = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1033 { U32 i; for (i=0; i<ZSTD_REP_NUM; i++) seqState.prevOffset[i] = dctx->rep[i]; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1034 CHECK_E(BIT_initDStream(&seqState.DStream, ip, iend-ip), corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1035 FSE_initDState(&seqState.stateLL, &seqState.DStream, dctx->LLTptr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1036 FSE_initDState(&seqState.stateOffb, &seqState.DStream, dctx->OFTptr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1037 FSE_initDState(&seqState.stateML, &seqState.DStream, dctx->MLTptr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1038 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1039 for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; ) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1040 nbSeq--; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1041 { seq_t const sequence = ZSTD_decodeSequence(&seqState); |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1042 size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litEnd, base, vBase, dictEnd); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1043 if (ZSTD_isError(oneSeqSize)) return oneSeqSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1044 op += oneSeqSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1045 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1046 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1047 /* check if reached exact end */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1048 if (nbSeq) return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1049 /* save reps for next block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1050 { U32 i; for (i=0; i<ZSTD_REP_NUM; i++) dctx->rep[i] = (U32)(seqState.prevOffset[i]); } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1051 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1052 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1053 /* last literal segment */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1054 { size_t const lastLLSize = litEnd - litPtr; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1055 if (lastLLSize > (size_t)(oend-op)) return ERROR(dstSize_tooSmall); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1056 memcpy(op, litPtr, lastLLSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1057 op += lastLLSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1058 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1059 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1060 return op-ostart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1061 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1062 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1063 |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1064 static seq_t ZSTD_decodeSequenceLong(seqState_t* seqState) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1065 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1066 seq_t seq; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1067 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1068 U32 const llCode = FSE_peekSymbol(&seqState->stateLL); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1069 U32 const mlCode = FSE_peekSymbol(&seqState->stateML); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1070 U32 const ofCode = FSE_peekSymbol(&seqState->stateOffb); /* <= maxOff, by table construction */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1071 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1072 U32 const llBits = LL_bits[llCode]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1073 U32 const mlBits = ML_bits[mlCode]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1074 U32 const ofBits = ofCode; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1075 U32 const totalBits = llBits+mlBits+ofBits; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1076 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1077 static const U32 LL_base[MaxLL+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1078 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1079 16, 18, 20, 22, 24, 28, 32, 40, 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1080 0x2000, 0x4000, 0x8000, 0x10000 }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1081 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1082 static const U32 ML_base[MaxML+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1083 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1084 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1085 35, 37, 39, 41, 43, 47, 51, 59, 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1086 0x1003, 0x2003, 0x4003, 0x8003, 0x10003 }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1087 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1088 static const U32 OF_base[MaxOff+1] = { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1089 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1090 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1091 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1092 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1093 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1094 /* sequence */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1095 { size_t offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1096 if (!ofCode) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1097 offset = 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1098 else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1099 offset = OF_base[ofCode] + BIT_readBitsFast(&seqState->DStream, ofBits); /* <= (ZSTD_WINDOWLOG_MAX-1) bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1100 if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1101 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1102 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1103 if (ofCode <= 1) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1104 offset += (llCode==0); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1105 if (offset) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1106 size_t temp = (offset==3) ? seqState->prevOffset[0] - 1 : seqState->prevOffset[offset]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1107 temp += !temp; /* 0 is not valid; input is corrupted; force offset to 1 */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1108 if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1109 seqState->prevOffset[1] = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1110 seqState->prevOffset[0] = offset = temp; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1111 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1112 offset = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1113 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1114 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1115 seqState->prevOffset[2] = seqState->prevOffset[1]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1116 seqState->prevOffset[1] = seqState->prevOffset[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1117 seqState->prevOffset[0] = offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1118 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1119 seq.offset = offset; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1120 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1121 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1122 seq.matchLength = ML_base[mlCode] + ((mlCode>31) ? BIT_readBitsFast(&seqState->DStream, mlBits) : 0); /* <= 16 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1123 if (MEM_32bits() && (mlBits+llBits>24)) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1124 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1125 seq.litLength = LL_base[llCode] + ((llCode>15) ? BIT_readBitsFast(&seqState->DStream, llBits) : 0); /* <= 16 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1126 if (MEM_32bits() || |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1127 (totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) ) BIT_reloadDStream(&seqState->DStream); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1128 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1129 { size_t const pos = seqState->pos + seq.litLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1130 seq.match = seqState->base + pos - seq.offset; /* single memory segment */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1131 if (seq.offset > pos) seq.match += seqState->gotoDict; /* separate memory segment */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1132 seqState->pos = pos + seq.matchLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1133 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1134 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1135 /* ANS state update */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1136 FSE_updateState(&seqState->stateLL, &seqState->DStream); /* <= 9 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1137 FSE_updateState(&seqState->stateML, &seqState->DStream); /* <= 9 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1138 if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); /* <= 18 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1139 FSE_updateState(&seqState->stateOffb, &seqState->DStream); /* <= 8 bits */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1140 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1141 return seq; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1142 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1143 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1144 FORCE_INLINE |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1145 size_t ZSTD_execSequenceLong(BYTE* op, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1146 BYTE* const oend, seq_t sequence, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1147 const BYTE** litPtr, const BYTE* const litLimit, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1148 const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd) |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1149 { |
30822
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1150 BYTE* const oLitEnd = op + sequence.litLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1151 size_t const sequenceLength = sequence.litLength + sequence.matchLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1152 BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1153 BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1154 const BYTE* const iLitEnd = *litPtr + sequence.litLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1155 const BYTE* match = sequence.match; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1156 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1157 /* check */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1158 #if 1 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1159 if (oMatchEnd>oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1160 if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1161 if (oLitEnd>oend_w) return ZSTD_execSequenceLast7(op, oend, sequence, litPtr, litLimit, base, vBase, dictEnd); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1162 #endif |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1163 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1164 /* copy Literals */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1165 ZSTD_copy8(op, *litPtr); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1166 if (sequence.litLength > 8) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1167 ZSTD_wildcopy(op+8, (*litPtr)+8, sequence.litLength - 8); /* note : since oLitEnd <= oend-WILDCOPY_OVERLENGTH, no risk of overwrite beyond oend */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1168 op = oLitEnd; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1169 *litPtr = iLitEnd; /* update for next sequence */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
1170 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1171 /* copy Match */ |
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
1172 #if 1 |
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zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1173 if (sequence.offset > (size_t)(oLitEnd - base)) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1174 /* offset beyond prefix */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1175 if (sequence.offset > (size_t)(oLitEnd - vBase)) return ERROR(corruption_detected); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1176 if (match + sequence.matchLength <= dictEnd) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1177 memmove(oLitEnd, match, sequence.matchLength); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1178 return sequenceLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
1179 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1180 /* span extDict & currentPrefixSegment */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1181 { size_t const length1 = dictEnd - match; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
1182 memmove(oLitEnd, match, length1); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1183 op = oLitEnd + length1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1184 sequence.matchLength -= length1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1185 match = base; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1186 if (op > oend_w || sequence.matchLength < MINMATCH) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1187 U32 i; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1188 for (i = 0; i < sequence.matchLength; ++i) op[i] = match[i]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1189 return sequenceLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1190 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1191 } } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1192 /* Requirement: op <= oend_w && sequence.matchLength >= MINMATCH */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1193 #endif |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1194 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1195 /* match within prefix */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1196 if (sequence.offset < 8) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1197 /* close range match, overlap */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1198 static const U32 dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1199 static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* substracted */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1200 int const sub2 = dec64table[sequence.offset]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1201 op[0] = match[0]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1202 op[1] = match[1]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1203 op[2] = match[2]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1204 op[3] = match[3]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1205 match += dec32table[sequence.offset]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1206 ZSTD_copy4(op+4, match); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1207 match -= sub2; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1208 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1209 ZSTD_copy8(op, match); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1210 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1211 op += 8; match += 8; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1212 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1213 if (oMatchEnd > oend-(16-MINMATCH)) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1214 if (op < oend_w) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1215 ZSTD_wildcopy(op, match, oend_w - op); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1216 match += oend_w - op; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1217 op = oend_w; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1218 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1219 while (op < oMatchEnd) *op++ = *match++; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1220 } else { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1221 ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8 */ |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1222 } |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1223 return sequenceLength; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1224 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1225 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1226 static size_t ZSTD_decompressSequencesLong( |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1227 ZSTD_DCtx* dctx, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1228 void* dst, size_t maxDstSize, |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1229 const void* seqStart, size_t seqSize) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1230 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1231 const BYTE* ip = (const BYTE*)seqStart; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1232 const BYTE* const iend = ip + seqSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1233 BYTE* const ostart = (BYTE* const)dst; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1234 BYTE* const oend = ostart + maxDstSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1235 BYTE* op = ostart; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1236 const BYTE* litPtr = dctx->litPtr; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1237 const BYTE* const litEnd = litPtr + dctx->litSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1238 const BYTE* const base = (const BYTE*) (dctx->base); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1239 const BYTE* const vBase = (const BYTE*) (dctx->vBase); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1240 const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1241 int nbSeq; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1242 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1243 /* Build Decoding Tables */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1244 { size_t const seqHSize = ZSTD_decodeSeqHeaders(dctx, &nbSeq, ip, seqSize); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1245 if (ZSTD_isError(seqHSize)) return seqHSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1246 ip += seqHSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1247 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1248 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1249 /* Regen sequences */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1250 if (nbSeq) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1251 #define STORED_SEQS 4 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1252 #define STOSEQ_MASK (STORED_SEQS-1) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1253 #define ADVANCED_SEQS 4 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1254 seq_t sequences[STORED_SEQS]; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1255 int const seqAdvance = MIN(nbSeq, ADVANCED_SEQS); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1256 seqState_t seqState; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1257 int seqNb; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1258 dctx->fseEntropy = 1; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1259 { U32 i; for (i=0; i<ZSTD_REP_NUM; i++) seqState.prevOffset[i] = dctx->rep[i]; } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1260 seqState.base = base; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1261 seqState.pos = (size_t)(op-base); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1262 seqState.gotoDict = (iPtrDiff)(dictEnd - base); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1263 CHECK_E(BIT_initDStream(&seqState.DStream, ip, iend-ip), corruption_detected); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1264 FSE_initDState(&seqState.stateLL, &seqState.DStream, dctx->LLTptr); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1265 FSE_initDState(&seqState.stateOffb, &seqState.DStream, dctx->OFTptr); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1266 FSE_initDState(&seqState.stateML, &seqState.DStream, dctx->MLTptr); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1267 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1268 /* prepare in advance */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1269 for (seqNb=0; (BIT_reloadDStream(&seqState.DStream) <= BIT_DStream_completed) && seqNb<seqAdvance; seqNb++) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1270 sequences[seqNb] = ZSTD_decodeSequenceLong(&seqState); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1271 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1272 if (seqNb<seqAdvance) return ERROR(corruption_detected); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1273 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1274 /* decode and decompress */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1275 for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && seqNb<nbSeq ; seqNb++) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1276 seq_t const sequence = ZSTD_decodeSequenceLong(&seqState); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1277 size_t const oneSeqSize = ZSTD_execSequenceLong(op, oend, sequences[(seqNb-ADVANCED_SEQS) & STOSEQ_MASK], &litPtr, litEnd, base, vBase, dictEnd); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1278 if (ZSTD_isError(oneSeqSize)) return oneSeqSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1279 ZSTD_PREFETCH(sequence.match); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1280 sequences[seqNb&STOSEQ_MASK] = sequence; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1281 op += oneSeqSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1282 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1283 if (seqNb<nbSeq) return ERROR(corruption_detected); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1284 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1285 /* finish queue */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1286 seqNb -= seqAdvance; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1287 for ( ; seqNb<nbSeq ; seqNb++) { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1288 size_t const oneSeqSize = ZSTD_execSequenceLong(op, oend, sequences[seqNb&STOSEQ_MASK], &litPtr, litEnd, base, vBase, dictEnd); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1289 if (ZSTD_isError(oneSeqSize)) return oneSeqSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1290 op += oneSeqSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1291 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1292 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1293 /* save reps for next block */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1294 { U32 i; for (i=0; i<ZSTD_REP_NUM; i++) dctx->rep[i] = (U32)(seqState.prevOffset[i]); } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1295 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1296 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1297 /* last literal segment */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1298 { size_t const lastLLSize = litEnd - litPtr; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1299 if (lastLLSize > (size_t)(oend-op)) return ERROR(dstSize_tooSmall); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1300 memcpy(op, litPtr, lastLLSize); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1301 op += lastLLSize; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1302 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1303 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1304 return op-ostart; |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1305 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1306 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1307 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1308 static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1309 void* dst, size_t dstCapacity, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1310 const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1311 { /* blockType == blockCompressed */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1312 const BYTE* ip = (const BYTE*)src; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1313 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1314 if (srcSize >= ZSTD_BLOCKSIZE_ABSOLUTEMAX) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1315 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1316 /* Decode literals sub-block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1317 { size_t const litCSize = ZSTD_decodeLiteralsBlock(dctx, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1318 if (ZSTD_isError(litCSize)) return litCSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1319 ip += litCSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1320 srcSize -= litCSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1321 } |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1322 if (dctx->fParams.windowSize > (1<<23)) return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize); |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1323 return ZSTD_decompressSequences(dctx, dst, dstCapacity, ip, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1324 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1325 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1326 |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1327 static void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1328 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1329 if (dst != dctx->previousDstEnd) { /* not contiguous */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1330 dctx->dictEnd = dctx->previousDstEnd; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1331 dctx->vBase = (const char*)dst - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base)); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1332 dctx->base = dst; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1333 dctx->previousDstEnd = dst; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1334 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1335 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1336 |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1337 size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1338 void* dst, size_t dstCapacity, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1339 const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1340 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1341 size_t dSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1342 ZSTD_checkContinuity(dctx, dst); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1343 dSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1344 dctx->previousDstEnd = (char*)dst + dSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1345 return dSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1346 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1347 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1348 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1349 /** ZSTD_insertBlock() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1350 insert `src` block into `dctx` history. Useful to track uncompressed blocks. */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1351 ZSTDLIB_API size_t ZSTD_insertBlock(ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1352 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1353 ZSTD_checkContinuity(dctx, blockStart); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1354 dctx->previousDstEnd = (const char*)blockStart + blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1355 return blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1356 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1357 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1358 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1359 size_t ZSTD_generateNxBytes(void* dst, size_t dstCapacity, BYTE byte, size_t length) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1360 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1361 if (length > dstCapacity) return ERROR(dstSize_tooSmall); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1362 memset(dst, byte, length); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1363 return length; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1364 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1365 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1366 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1367 /*! ZSTD_decompressFrame() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1368 * `dctx` must be properly initialized */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1369 static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1370 void* dst, size_t dstCapacity, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1371 const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1372 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1373 const BYTE* ip = (const BYTE*)src; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1374 BYTE* const ostart = (BYTE* const)dst; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1375 BYTE* const oend = ostart + dstCapacity; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1376 BYTE* op = ostart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1377 size_t remainingSize = srcSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1378 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1379 /* check */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1380 if (srcSize < ZSTD_frameHeaderSize_min+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1381 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1382 /* Frame Header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1383 { size_t const frameHeaderSize = ZSTD_frameHeaderSize(src, ZSTD_frameHeaderSize_prefix); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1384 if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1385 if (srcSize < frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1386 CHECK_F(ZSTD_decodeFrameHeader(dctx, src, frameHeaderSize)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1387 ip += frameHeaderSize; remainingSize -= frameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1388 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1389 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1390 /* Loop on each block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1391 while (1) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1392 size_t decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1393 blockProperties_t blockProperties; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1394 size_t const cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1395 if (ZSTD_isError(cBlockSize)) return cBlockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1396 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1397 ip += ZSTD_blockHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1398 remainingSize -= ZSTD_blockHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1399 if (cBlockSize > remainingSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1400 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1401 switch(blockProperties.blockType) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1402 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1403 case bt_compressed: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1404 decodedSize = ZSTD_decompressBlock_internal(dctx, op, oend-op, ip, cBlockSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1405 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1406 case bt_raw : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1407 decodedSize = ZSTD_copyRawBlock(op, oend-op, ip, cBlockSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1408 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1409 case bt_rle : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1410 decodedSize = ZSTD_generateNxBytes(op, oend-op, *ip, blockProperties.origSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1411 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1412 case bt_reserved : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1413 default: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1414 return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1415 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1416 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1417 if (ZSTD_isError(decodedSize)) return decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1418 if (dctx->fParams.checksumFlag) XXH64_update(&dctx->xxhState, op, decodedSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1419 op += decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1420 ip += cBlockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1421 remainingSize -= cBlockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1422 if (blockProperties.lastBlock) break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1423 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1424 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1425 if (dctx->fParams.checksumFlag) { /* Frame content checksum verification */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1426 U32 const checkCalc = (U32)XXH64_digest(&dctx->xxhState); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1427 U32 checkRead; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1428 if (remainingSize<4) return ERROR(checksum_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1429 checkRead = MEM_readLE32(ip); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1430 if (checkRead != checkCalc) return ERROR(checksum_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1431 remainingSize -= 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1432 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1433 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1434 if (remainingSize) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1435 return op-ostart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1436 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1437 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1438 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1439 size_t ZSTD_decompress_usingDict(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1440 void* dst, size_t dstCapacity, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1441 const void* src, size_t srcSize, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1442 const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1443 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1444 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1445 if (ZSTD_isLegacy(src, srcSize)) return ZSTD_decompressLegacy(dst, dstCapacity, src, srcSize, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1446 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1447 ZSTD_decompressBegin_usingDict(dctx, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1448 ZSTD_checkContinuity(dctx, dst); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1449 return ZSTD_decompressFrame(dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1450 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1451 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1452 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1453 size_t ZSTD_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1454 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1455 return ZSTD_decompress_usingDict(dctx, dst, dstCapacity, src, srcSize, NULL, 0); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1456 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1457 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1458 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1459 size_t ZSTD_decompress(void* dst, size_t dstCapacity, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1460 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1461 #if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1462 size_t regenSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1463 ZSTD_DCtx* const dctx = ZSTD_createDCtx(); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1464 if (dctx==NULL) return ERROR(memory_allocation); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1465 regenSize = ZSTD_decompressDCtx(dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1466 ZSTD_freeDCtx(dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1467 return regenSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1468 #else /* stack mode */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1469 ZSTD_DCtx dctx; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1470 return ZSTD_decompressDCtx(&dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1471 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1472 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1473 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1474 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1475 /*-************************************** |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1476 * Advanced Streaming Decompression API |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1477 * Bufferless and synchronous |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1478 ****************************************/ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1479 size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx) { return dctx->expected; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1480 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1481 ZSTD_nextInputType_e ZSTD_nextInputType(ZSTD_DCtx* dctx) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1482 switch(dctx->stage) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1483 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1484 default: /* should not happen */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1485 case ZSTDds_getFrameHeaderSize: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1486 case ZSTDds_decodeFrameHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1487 return ZSTDnit_frameHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1488 case ZSTDds_decodeBlockHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1489 return ZSTDnit_blockHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1490 case ZSTDds_decompressBlock: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1491 return ZSTDnit_block; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1492 case ZSTDds_decompressLastBlock: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1493 return ZSTDnit_lastBlock; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1494 case ZSTDds_checkChecksum: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1495 return ZSTDnit_checksum; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1496 case ZSTDds_decodeSkippableHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1497 case ZSTDds_skipFrame: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1498 return ZSTDnit_skippableFrame; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1499 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1500 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1501 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1502 int ZSTD_isSkipFrame(ZSTD_DCtx* dctx) { return dctx->stage == ZSTDds_skipFrame; } /* for zbuff */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1503 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1504 /** ZSTD_decompressContinue() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1505 * @return : nb of bytes generated into `dst` (necessarily <= `dstCapacity) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1506 * or an error code, which can be tested using ZSTD_isError() */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1507 size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1508 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1509 /* Sanity check */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1510 if (srcSize != dctx->expected) return ERROR(srcSize_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1511 if (dstCapacity) ZSTD_checkContinuity(dctx, dst); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1512 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1513 switch (dctx->stage) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1514 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1515 case ZSTDds_getFrameHeaderSize : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1516 if (srcSize != ZSTD_frameHeaderSize_prefix) return ERROR(srcSize_wrong); /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1517 if ((MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { /* skippable frame */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1518 memcpy(dctx->headerBuffer, src, ZSTD_frameHeaderSize_prefix); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1519 dctx->expected = ZSTD_skippableHeaderSize - ZSTD_frameHeaderSize_prefix; /* magic number + skippable frame length */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1520 dctx->stage = ZSTDds_decodeSkippableHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1521 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1522 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1523 dctx->headerSize = ZSTD_frameHeaderSize(src, ZSTD_frameHeaderSize_prefix); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1524 if (ZSTD_isError(dctx->headerSize)) return dctx->headerSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1525 memcpy(dctx->headerBuffer, src, ZSTD_frameHeaderSize_prefix); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1526 if (dctx->headerSize > ZSTD_frameHeaderSize_prefix) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1527 dctx->expected = dctx->headerSize - ZSTD_frameHeaderSize_prefix; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1528 dctx->stage = ZSTDds_decodeFrameHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1529 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1530 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1531 dctx->expected = 0; /* not necessary to copy more */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1532 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1533 case ZSTDds_decodeFrameHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1534 memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1535 CHECK_F(ZSTD_decodeFrameHeader(dctx, dctx->headerBuffer, dctx->headerSize)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1536 dctx->expected = ZSTD_blockHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1537 dctx->stage = ZSTDds_decodeBlockHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1538 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1539 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1540 case ZSTDds_decodeBlockHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1541 { blockProperties_t bp; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1542 size_t const cBlockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1543 if (ZSTD_isError(cBlockSize)) return cBlockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1544 dctx->expected = cBlockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1545 dctx->bType = bp.blockType; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1546 dctx->rleSize = bp.origSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1547 if (cBlockSize) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1548 dctx->stage = bp.lastBlock ? ZSTDds_decompressLastBlock : ZSTDds_decompressBlock; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1549 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1550 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1551 /* empty block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1552 if (bp.lastBlock) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1553 if (dctx->fParams.checksumFlag) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1554 dctx->expected = 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1555 dctx->stage = ZSTDds_checkChecksum; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1556 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1557 dctx->expected = 0; /* end of frame */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1558 dctx->stage = ZSTDds_getFrameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1559 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1560 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1561 dctx->expected = 3; /* go directly to next header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1562 dctx->stage = ZSTDds_decodeBlockHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1563 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1564 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1565 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1566 case ZSTDds_decompressLastBlock: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1567 case ZSTDds_decompressBlock: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1568 { size_t rSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1569 switch(dctx->bType) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1570 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1571 case bt_compressed: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1572 rSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1573 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1574 case bt_raw : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1575 rSize = ZSTD_copyRawBlock(dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1576 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1577 case bt_rle : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1578 rSize = ZSTD_setRleBlock(dst, dstCapacity, src, srcSize, dctx->rleSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1579 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1580 case bt_reserved : /* should never happen */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1581 default: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1582 return ERROR(corruption_detected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1583 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1584 if (ZSTD_isError(rSize)) return rSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1585 if (dctx->fParams.checksumFlag) XXH64_update(&dctx->xxhState, dst, rSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1586 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1587 if (dctx->stage == ZSTDds_decompressLastBlock) { /* end of frame */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1588 if (dctx->fParams.checksumFlag) { /* another round for frame checksum */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1589 dctx->expected = 4; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1590 dctx->stage = ZSTDds_checkChecksum; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1591 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1592 dctx->expected = 0; /* ends here */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1593 dctx->stage = ZSTDds_getFrameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1594 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1595 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1596 dctx->stage = ZSTDds_decodeBlockHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1597 dctx->expected = ZSTD_blockHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1598 dctx->previousDstEnd = (char*)dst + rSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1599 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1600 return rSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1601 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1602 case ZSTDds_checkChecksum: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1603 { U32 const h32 = (U32)XXH64_digest(&dctx->xxhState); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1604 U32 const check32 = MEM_readLE32(src); /* srcSize == 4, guaranteed by dctx->expected */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1605 if (check32 != h32) return ERROR(checksum_wrong); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1606 dctx->expected = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1607 dctx->stage = ZSTDds_getFrameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1608 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1609 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1610 case ZSTDds_decodeSkippableHeader: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1611 { memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1612 dctx->expected = MEM_readLE32(dctx->headerBuffer + 4); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1613 dctx->stage = ZSTDds_skipFrame; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1614 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1615 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1616 case ZSTDds_skipFrame: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1617 { dctx->expected = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1618 dctx->stage = ZSTDds_getFrameHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1619 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1620 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1621 default: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1622 return ERROR(GENERIC); /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1623 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1624 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1625 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1626 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1627 static size_t ZSTD_refDictContent(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1628 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1629 dctx->dictEnd = dctx->previousDstEnd; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1630 dctx->vBase = (const char*)dict - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1631 dctx->base = dict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1632 dctx->previousDstEnd = (const char*)dict + dictSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1633 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1634 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1635 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1636 static size_t ZSTD_loadEntropy(ZSTD_DCtx* dctx, const void* const dict, size_t const dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1637 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1638 const BYTE* dictPtr = (const BYTE*)dict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1639 const BYTE* const dictEnd = dictPtr + dictSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1640 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1641 { size_t const hSize = HUF_readDTableX4(dctx->hufTable, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1642 if (HUF_isError(hSize)) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1643 dictPtr += hSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1644 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1645 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1646 { short offcodeNCount[MaxOff+1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1647 U32 offcodeMaxValue=MaxOff, offcodeLog; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1648 size_t const offcodeHeaderSize = FSE_readNCount(offcodeNCount, &offcodeMaxValue, &offcodeLog, dictPtr, dictEnd-dictPtr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1649 if (FSE_isError(offcodeHeaderSize)) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1650 if (offcodeLog > OffFSELog) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1651 CHECK_E(FSE_buildDTable(dctx->OFTable, offcodeNCount, offcodeMaxValue, offcodeLog), dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1652 dictPtr += offcodeHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1653 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1654 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1655 { short matchlengthNCount[MaxML+1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1656 unsigned matchlengthMaxValue = MaxML, matchlengthLog; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1657 size_t const matchlengthHeaderSize = FSE_readNCount(matchlengthNCount, &matchlengthMaxValue, &matchlengthLog, dictPtr, dictEnd-dictPtr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1658 if (FSE_isError(matchlengthHeaderSize)) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1659 if (matchlengthLog > MLFSELog) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1660 CHECK_E(FSE_buildDTable(dctx->MLTable, matchlengthNCount, matchlengthMaxValue, matchlengthLog), dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1661 dictPtr += matchlengthHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1662 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1663 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1664 { short litlengthNCount[MaxLL+1]; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1665 unsigned litlengthMaxValue = MaxLL, litlengthLog; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1666 size_t const litlengthHeaderSize = FSE_readNCount(litlengthNCount, &litlengthMaxValue, &litlengthLog, dictPtr, dictEnd-dictPtr); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1667 if (FSE_isError(litlengthHeaderSize)) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1668 if (litlengthLog > LLFSELog) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1669 CHECK_E(FSE_buildDTable(dctx->LLTable, litlengthNCount, litlengthMaxValue, litlengthLog), dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1670 dictPtr += litlengthHeaderSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1671 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1672 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1673 if (dictPtr+12 > dictEnd) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1674 dctx->rep[0] = MEM_readLE32(dictPtr+0); if (dctx->rep[0] >= dictSize) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1675 dctx->rep[1] = MEM_readLE32(dictPtr+4); if (dctx->rep[1] >= dictSize) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1676 dctx->rep[2] = MEM_readLE32(dictPtr+8); if (dctx->rep[2] >= dictSize) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1677 dictPtr += 12; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1678 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1679 dctx->litEntropy = dctx->fseEntropy = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1680 return dictPtr - (const BYTE*)dict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1681 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1682 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1683 static size_t ZSTD_decompress_insertDictionary(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1684 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1685 if (dictSize < 8) return ZSTD_refDictContent(dctx, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1686 { U32 const magic = MEM_readLE32(dict); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1687 if (magic != ZSTD_DICT_MAGIC) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1688 return ZSTD_refDictContent(dctx, dict, dictSize); /* pure content mode */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1689 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1690 dctx->dictID = MEM_readLE32((const char*)dict + 4); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1691 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1692 /* load entropy tables */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1693 dict = (const char*)dict + 8; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1694 dictSize -= 8; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1695 { size_t const eSize = ZSTD_loadEntropy(dctx, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1696 if (ZSTD_isError(eSize)) return ERROR(dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1697 dict = (const char*)dict + eSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1698 dictSize -= eSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1699 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1700 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1701 /* reference dictionary content */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1702 return ZSTD_refDictContent(dctx, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1703 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1704 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1705 size_t ZSTD_decompressBegin_usingDict(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1706 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1707 CHECK_F(ZSTD_decompressBegin(dctx)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1708 if (dict && dictSize) CHECK_E(ZSTD_decompress_insertDictionary(dctx, dict, dictSize), dictionary_corrupted); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1709 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1710 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1711 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1712 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1713 /* ====== ZSTD_DDict ====== */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1714 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1715 struct ZSTD_DDict_s { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1716 void* dict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1717 size_t dictSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1718 ZSTD_DCtx* refContext; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1719 }; /* typedef'd to ZSTD_DDict within "zstd.h" */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1720 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1721 ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize, ZSTD_customMem customMem) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1722 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1723 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1724 if (!customMem.customAlloc || !customMem.customFree) return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1725 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1726 { ZSTD_DDict* const ddict = (ZSTD_DDict*) ZSTD_malloc(sizeof(ZSTD_DDict), customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1727 void* const dictContent = ZSTD_malloc(dictSize, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1728 ZSTD_DCtx* const dctx = ZSTD_createDCtx_advanced(customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1729 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1730 if (!dictContent || !ddict || !dctx) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1731 ZSTD_free(dictContent, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1732 ZSTD_free(ddict, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1733 ZSTD_free(dctx, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1734 return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1735 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1736 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1737 if (dictSize) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1738 memcpy(dictContent, dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1739 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1740 { size_t const errorCode = ZSTD_decompressBegin_usingDict(dctx, dictContent, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1741 if (ZSTD_isError(errorCode)) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1742 ZSTD_free(dictContent, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1743 ZSTD_free(ddict, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1744 ZSTD_free(dctx, customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1745 return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1746 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1747 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1748 ddict->dict = dictContent; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1749 ddict->dictSize = dictSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1750 ddict->refContext = dctx; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1751 return ddict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1752 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1753 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1754 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1755 /*! ZSTD_createDDict() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1756 * Create a digested dictionary, ready to start decompression without startup delay. |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1757 * `dict` can be released after `ZSTD_DDict` creation */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1758 ZSTD_DDict* ZSTD_createDDict(const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1759 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1760 ZSTD_customMem const allocator = { NULL, NULL, NULL }; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1761 return ZSTD_createDDict_advanced(dict, dictSize, allocator); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1762 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1763 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1764 size_t ZSTD_freeDDict(ZSTD_DDict* ddict) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1765 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1766 if (ddict==NULL) return 0; /* support free on NULL */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1767 { ZSTD_customMem const cMem = ddict->refContext->customMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1768 ZSTD_freeDCtx(ddict->refContext); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1769 ZSTD_free(ddict->dict, cMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1770 ZSTD_free(ddict, cMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1771 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1772 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1773 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1774 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1775 size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1776 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1777 if (ddict==NULL) return 0; /* support sizeof on NULL */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1778 return sizeof(*ddict) + sizeof(ddict->refContext) + ddict->dictSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1779 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1780 |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1781 /*! ZSTD_getDictID_fromDict() : |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1782 * Provides the dictID stored within dictionary. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1783 * if @return == 0, the dictionary is not conformant with Zstandard specification. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1784 * It can still be loaded, but as a content-only dictionary. */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1785 unsigned ZSTD_getDictID_fromDict(const void* dict, size_t dictSize) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1786 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1787 if (dictSize < 8) return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1788 if (MEM_readLE32(dict) != ZSTD_DICT_MAGIC) return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1789 return MEM_readLE32((const char*)dict + 4); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1790 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1791 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1792 /*! ZSTD_getDictID_fromDDict() : |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1793 * Provides the dictID of the dictionary loaded into `ddict`. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1794 * If @return == 0, the dictionary is not conformant to Zstandard specification, or empty. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1795 * Non-conformant dictionaries can still be loaded, but as content-only dictionaries. */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1796 unsigned ZSTD_getDictID_fromDDict(const ZSTD_DDict* ddict) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1797 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1798 if (ddict==NULL) return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1799 return ZSTD_getDictID_fromDict(ddict->dict, ddict->dictSize); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1800 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1801 |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1802 /*! ZSTD_getDictID_fromFrame() : |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1803 * Provides the dictID required to decompressed the frame stored within `src`. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1804 * If @return == 0, the dictID could not be decoded. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1805 * This could for one of the following reasons : |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1806 * - The frame does not require a dictionary to be decoded (most common case). |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1807 * - The frame was built with dictID intentionally removed. Whatever dictionary is necessary is a hidden information. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1808 * Note : this use case also happens when using a non-conformant dictionary. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1809 * - `srcSize` is too small, and as a result, the frame header could not be decoded (only possible if `srcSize < ZSTD_FRAMEHEADERSIZE_MAX`). |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1810 * - This is not a Zstandard frame. |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1811 * When identifying the exact failure cause, it's possible to used ZSTD_getFrameParams(), which will provide a more precise error code. */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1812 unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize) |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1813 { |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1814 ZSTD_frameParams zfp = { 0 , 0 , 0 , 0 }; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1815 size_t const hError = ZSTD_getFrameParams(&zfp, src, srcSize); |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1816 if (ZSTD_isError(hError)) return 0; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1817 return zfp.dictID; |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1818 } |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
1819 |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1820 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1821 /*! ZSTD_decompress_usingDDict() : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1822 * Decompression using a pre-digested Dictionary |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1823 * Use dictionary without significant overhead. */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1824 size_t ZSTD_decompress_usingDDict(ZSTD_DCtx* dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1825 void* dst, size_t dstCapacity, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1826 const void* src, size_t srcSize, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1827 const ZSTD_DDict* ddict) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1828 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1829 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1830 if (ZSTD_isLegacy(src, srcSize)) return ZSTD_decompressLegacy(dst, dstCapacity, src, srcSize, ddict->dict, ddict->dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1831 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1832 ZSTD_refDCtx(dctx, ddict->refContext); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1833 ZSTD_checkContinuity(dctx, dst); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1834 return ZSTD_decompressFrame(dctx, dst, dstCapacity, src, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1835 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1836 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1837 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1838 /*===================================== |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1839 * Streaming decompression |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1840 *====================================*/ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1841 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1842 typedef enum { zdss_init, zdss_loadHeader, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1843 zdss_read, zdss_load, zdss_flush } ZSTD_dStreamStage; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1844 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1845 /* *** Resource management *** */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1846 struct ZSTD_DStream_s { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1847 ZSTD_DCtx* dctx; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1848 ZSTD_DDict* ddictLocal; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1849 const ZSTD_DDict* ddict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1850 ZSTD_frameParams fParams; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1851 ZSTD_dStreamStage stage; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1852 char* inBuff; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1853 size_t inBuffSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1854 size_t inPos; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1855 size_t maxWindowSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1856 char* outBuff; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1857 size_t outBuffSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1858 size_t outStart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1859 size_t outEnd; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1860 size_t blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1861 BYTE headerBuffer[ZSTD_FRAMEHEADERSIZE_MAX]; /* tmp buffer to store frame header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1862 size_t lhSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1863 ZSTD_customMem customMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1864 void* legacyContext; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1865 U32 previousLegacyVersion; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1866 U32 legacyVersion; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1867 U32 hostageByte; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1868 }; /* typedef'd to ZSTD_DStream within "zstd.h" */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1869 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1870 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1871 ZSTD_DStream* ZSTD_createDStream(void) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1872 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1873 return ZSTD_createDStream_advanced(defaultCustomMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1874 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1875 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1876 ZSTD_DStream* ZSTD_createDStream_advanced(ZSTD_customMem customMem) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1877 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1878 ZSTD_DStream* zds; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1879 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1880 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1881 if (!customMem.customAlloc || !customMem.customFree) return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1882 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1883 zds = (ZSTD_DStream*) ZSTD_malloc(sizeof(ZSTD_DStream), customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1884 if (zds==NULL) return NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1885 memset(zds, 0, sizeof(ZSTD_DStream)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1886 memcpy(&zds->customMem, &customMem, sizeof(ZSTD_customMem)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1887 zds->dctx = ZSTD_createDCtx_advanced(customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1888 if (zds->dctx == NULL) { ZSTD_freeDStream(zds); return NULL; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1889 zds->stage = zdss_init; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1890 zds->maxWindowSize = ZSTD_MAXWINDOWSIZE_DEFAULT; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1891 return zds; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1892 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1893 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1894 size_t ZSTD_freeDStream(ZSTD_DStream* zds) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1895 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1896 if (zds==NULL) return 0; /* support free on null */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1897 { ZSTD_customMem const cMem = zds->customMem; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1898 ZSTD_freeDCtx(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1899 ZSTD_freeDDict(zds->ddictLocal); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1900 ZSTD_free(zds->inBuff, cMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1901 ZSTD_free(zds->outBuff, cMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1902 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1903 if (zds->legacyContext) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1904 ZSTD_freeLegacyStreamContext(zds->legacyContext, zds->previousLegacyVersion); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1905 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1906 ZSTD_free(zds, cMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1907 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1908 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1909 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1910 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1911 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1912 /* *** Initialization *** */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1913 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1914 size_t ZSTD_DStreamInSize(void) { return ZSTD_BLOCKSIZE_ABSOLUTEMAX + ZSTD_blockHeaderSize; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1915 size_t ZSTD_DStreamOutSize(void) { return ZSTD_BLOCKSIZE_ABSOLUTEMAX; } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1916 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1917 size_t ZSTD_initDStream_usingDict(ZSTD_DStream* zds, const void* dict, size_t dictSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1918 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1919 zds->stage = zdss_loadHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1920 zds->lhSize = zds->inPos = zds->outStart = zds->outEnd = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1921 ZSTD_freeDDict(zds->ddictLocal); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1922 if (dict) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1923 zds->ddictLocal = ZSTD_createDDict(dict, dictSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1924 if (zds->ddictLocal == NULL) return ERROR(memory_allocation); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1925 } else zds->ddictLocal = NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1926 zds->ddict = zds->ddictLocal; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1927 zds->legacyVersion = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1928 zds->hostageByte = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1929 return ZSTD_frameHeaderSize_prefix; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1930 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1931 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1932 size_t ZSTD_initDStream(ZSTD_DStream* zds) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1933 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1934 return ZSTD_initDStream_usingDict(zds, NULL, 0); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1935 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1936 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1937 size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* zds, const ZSTD_DDict* ddict) /**< note : ddict will just be referenced, and must outlive decompression session */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1938 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1939 size_t const initResult = ZSTD_initDStream(zds); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1940 zds->ddict = ddict; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1941 return initResult; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1942 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1943 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1944 size_t ZSTD_resetDStream(ZSTD_DStream* zds) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1945 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1946 zds->stage = zdss_loadHeader; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1947 zds->lhSize = zds->inPos = zds->outStart = zds->outEnd = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1948 zds->legacyVersion = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1949 zds->hostageByte = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1950 return ZSTD_frameHeaderSize_prefix; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1951 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1952 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1953 size_t ZSTD_setDStreamParameter(ZSTD_DStream* zds, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1954 ZSTD_DStreamParameter_e paramType, unsigned paramValue) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1955 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1956 switch(paramType) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1957 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1958 default : return ERROR(parameter_unknown); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1959 case ZSTDdsp_maxWindowSize : zds->maxWindowSize = paramValue ? paramValue : (U32)(-1); break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1960 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1961 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1962 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1963 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1964 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1965 size_t ZSTD_sizeof_DStream(const ZSTD_DStream* zds) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1966 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1967 if (zds==NULL) return 0; /* support sizeof on NULL */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1968 return sizeof(*zds) + ZSTD_sizeof_DCtx(zds->dctx) + ZSTD_sizeof_DDict(zds->ddictLocal) + zds->inBuffSize + zds->outBuffSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1969 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1970 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1971 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1972 /* ***** Decompression ***** */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1973 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1974 MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1975 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1976 size_t const length = MIN(dstCapacity, srcSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1977 memcpy(dst, src, length); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1978 return length; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1979 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1980 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1981 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1982 size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inBuffer* input) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1983 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1984 const char* const istart = (const char*)(input->src) + input->pos; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1985 const char* const iend = (const char*)(input->src) + input->size; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1986 const char* ip = istart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1987 char* const ostart = (char*)(output->dst) + output->pos; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1988 char* const oend = (char*)(output->dst) + output->size; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1989 char* op = ostart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1990 U32 someMoreWork = 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1991 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1992 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1993 if (zds->legacyVersion) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1994 return ZSTD_decompressLegacyStream(zds->legacyContext, zds->legacyVersion, output, input); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1995 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1996 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1997 while (someMoreWork) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1998 switch(zds->stage) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1999 { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2000 case zdss_init : |
30822
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
2001 ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */ |
b54a2984cdd4
zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30434
diff
changeset
|
2002 /* fall-through */ |
30434
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2003 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2004 case zdss_loadHeader : |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2005 { size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2006 if (ZSTD_isError(hSize)) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2007 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2008 { U32 const legacyVersion = ZSTD_isLegacy(istart, iend-istart); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2009 if (legacyVersion) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2010 const void* const dict = zds->ddict ? zds->ddict->dict : NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2011 size_t const dictSize = zds->ddict ? zds->ddict->dictSize : 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2012 CHECK_F(ZSTD_initLegacyStream(&zds->legacyContext, zds->previousLegacyVersion, legacyVersion, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2013 dict, dictSize)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2014 zds->legacyVersion = zds->previousLegacyVersion = legacyVersion; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2015 return ZSTD_decompressLegacyStream(zds->legacyContext, zds->legacyVersion, output, input); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2016 } else { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2017 return hSize; /* error */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2018 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2019 #else |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2020 return hSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2021 #endif |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2022 if (hSize != 0) { /* need more input */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2023 size_t const toLoad = hSize - zds->lhSize; /* if hSize!=0, hSize > zds->lhSize */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2024 if (toLoad > (size_t)(iend-ip)) { /* not enough input to load full header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2025 memcpy(zds->headerBuffer + zds->lhSize, ip, iend-ip); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2026 zds->lhSize += iend-ip; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2027 input->pos = input->size; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2028 return (MAX(ZSTD_frameHeaderSize_min, hSize) - zds->lhSize) + ZSTD_blockHeaderSize; /* remaining header bytes + next block header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2029 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2030 memcpy(zds->headerBuffer + zds->lhSize, ip, toLoad); zds->lhSize = hSize; ip += toLoad; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2031 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2032 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2033 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2034 /* Consume header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2035 { const ZSTD_DCtx* refContext = zds->ddict ? zds->ddict->refContext : NULL; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2036 ZSTD_refDCtx(zds->dctx, refContext); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2037 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2038 { size_t const h1Size = ZSTD_nextSrcSizeToDecompress(zds->dctx); /* == ZSTD_frameHeaderSize_prefix */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2039 CHECK_F(ZSTD_decompressContinue(zds->dctx, NULL, 0, zds->headerBuffer, h1Size)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2040 { size_t const h2Size = ZSTD_nextSrcSizeToDecompress(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2041 CHECK_F(ZSTD_decompressContinue(zds->dctx, NULL, 0, zds->headerBuffer+h1Size, h2Size)); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2042 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2043 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2044 zds->fParams.windowSize = MAX(zds->fParams.windowSize, 1U << ZSTD_WINDOWLOG_ABSOLUTEMIN); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2045 if (zds->fParams.windowSize > zds->maxWindowSize) return ERROR(frameParameter_windowTooLarge); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2046 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2047 /* Adapt buffer sizes to frame header instructions */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2048 { size_t const blockSize = MIN(zds->fParams.windowSize, ZSTD_BLOCKSIZE_ABSOLUTEMAX); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2049 size_t const neededOutSize = zds->fParams.windowSize + blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2050 zds->blockSize = blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2051 if (zds->inBuffSize < blockSize) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2052 ZSTD_free(zds->inBuff, zds->customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2053 zds->inBuffSize = blockSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2054 zds->inBuff = (char*)ZSTD_malloc(blockSize, zds->customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2055 if (zds->inBuff == NULL) return ERROR(memory_allocation); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2056 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2057 if (zds->outBuffSize < neededOutSize) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2058 ZSTD_free(zds->outBuff, zds->customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2059 zds->outBuffSize = neededOutSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2060 zds->outBuff = (char*)ZSTD_malloc(neededOutSize, zds->customMem); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2061 if (zds->outBuff == NULL) return ERROR(memory_allocation); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2062 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2063 zds->stage = zdss_read; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2064 /* pass-through */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2065 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2066 case zdss_read: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2067 { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2068 if (neededInSize==0) { /* end of frame */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2069 zds->stage = zdss_init; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2070 someMoreWork = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2071 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2072 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2073 if ((size_t)(iend-ip) >= neededInSize) { /* decode directly from src */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2074 const int isSkipFrame = ZSTD_isSkipFrame(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2075 size_t const decodedSize = ZSTD_decompressContinue(zds->dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2076 zds->outBuff + zds->outStart, (isSkipFrame ? 0 : zds->outBuffSize - zds->outStart), |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2077 ip, neededInSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2078 if (ZSTD_isError(decodedSize)) return decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2079 ip += neededInSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2080 if (!decodedSize && !isSkipFrame) break; /* this was just a header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2081 zds->outEnd = zds->outStart + decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2082 zds->stage = zdss_flush; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2083 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2084 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2085 if (ip==iend) { someMoreWork = 0; break; } /* no more input */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2086 zds->stage = zdss_load; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2087 /* pass-through */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2088 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2089 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2090 case zdss_load: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2091 { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2092 size_t const toLoad = neededInSize - zds->inPos; /* should always be <= remaining space within inBuff */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2093 size_t loadedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2094 if (toLoad > zds->inBuffSize - zds->inPos) return ERROR(corruption_detected); /* should never happen */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2095 loadedSize = ZSTD_limitCopy(zds->inBuff + zds->inPos, toLoad, ip, iend-ip); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2096 ip += loadedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2097 zds->inPos += loadedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2098 if (loadedSize < toLoad) { someMoreWork = 0; break; } /* not enough input, wait for more */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2099 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2100 /* decode loaded input */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2101 { const int isSkipFrame = ZSTD_isSkipFrame(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2102 size_t const decodedSize = ZSTD_decompressContinue(zds->dctx, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2103 zds->outBuff + zds->outStart, zds->outBuffSize - zds->outStart, |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2104 zds->inBuff, neededInSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2105 if (ZSTD_isError(decodedSize)) return decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2106 zds->inPos = 0; /* input is consumed */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2107 if (!decodedSize && !isSkipFrame) { zds->stage = zdss_read; break; } /* this was just a header */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2108 zds->outEnd = zds->outStart + decodedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2109 zds->stage = zdss_flush; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2110 /* pass-through */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2111 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2112 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2113 case zdss_flush: |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2114 { size_t const toFlushSize = zds->outEnd - zds->outStart; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2115 size_t const flushedSize = ZSTD_limitCopy(op, oend-op, zds->outBuff + zds->outStart, toFlushSize); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2116 op += flushedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2117 zds->outStart += flushedSize; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2118 if (flushedSize == toFlushSize) { /* flush completed */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2119 zds->stage = zdss_read; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2120 if (zds->outStart + zds->blockSize > zds->outBuffSize) |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2121 zds->outStart = zds->outEnd = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2122 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2123 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2124 /* cannot complete flush */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2125 someMoreWork = 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2126 break; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2127 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2128 default: return ERROR(GENERIC); /* impossible */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2129 } } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2130 |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2131 /* result */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2132 input->pos += (size_t)(ip-istart); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2133 output->pos += (size_t)(op-ostart); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2134 { size_t nextSrcSizeHint = ZSTD_nextSrcSizeToDecompress(zds->dctx); |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2135 if (!nextSrcSizeHint) { /* frame fully decoded */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2136 if (zds->outEnd == zds->outStart) { /* output fully flushed */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2137 if (zds->hostageByte) { |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2138 if (input->pos >= input->size) { zds->stage = zdss_read; return 1; } /* can't release hostage (not present) */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2139 input->pos++; /* release hostage */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2140 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2141 return 0; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2142 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2143 if (!zds->hostageByte) { /* output not fully flushed; keep last byte as hostage; will be released when all output is flushed */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2144 input->pos--; /* note : pos > 0, otherwise, impossible to finish reading last block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2145 zds->hostageByte=1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2146 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2147 return 1; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2148 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2149 nextSrcSizeHint += ZSTD_blockHeaderSize * (ZSTD_nextInputType(zds->dctx) == ZSTDnit_block); /* preload header of next block */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2150 if (zds->inPos > nextSrcSizeHint) return ERROR(GENERIC); /* should never happen */ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2151 nextSrcSizeHint -= zds->inPos; /* already loaded*/ |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2152 return nextSrcSizeHint; |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2153 } |
2e484bdea8c4
zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2154 } |