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annotate contrib/python-zstandard/zstd/common/zstd_internal.h @ 37495:b1fb341d8a61

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zstandard: vendor python-zstandard 0.9.0 This was just released. It features a number of goodies. More info at https://gregoryszorc.com/blog/2018/04/09/release-of-python-zstandard-0.9/. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.4. The old version was 1.1.3. One of the changes between those versions is that zstandard is now dual licensed BSD + GPLv2 and the patent rights grant has been removed. Good riddance. The API should be backwards compatible. So no changes in core should be needed. However, there were a number of changes in the library that we'll want to adapt to. Those will be addressed in subsequent commits. Differential Revision: https://phab.mercurial-scm.org/D3198
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 09 Apr 2018 10:13:29 -0700
parents c32454d69b85
children 73fef626dae3
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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 both the BSD-style license (found in the
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6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
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7 * in the COPYING file in the root directory of this source tree).
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8 * You may select, at your option, one of the above-listed licenses.
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9 */
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10
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11 #ifndef ZSTD_CCOMMON_H_MODULE
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12 #define ZSTD_CCOMMON_H_MODULE
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13
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14 /* this module contains definitions which must be identical
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15 * across compression, decompression and dictBuilder.
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16 * It also contains a few functions useful to at least 2 of them
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17 * and which benefit from being inlined */
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18
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19 /*-*************************************
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20 * Dependencies
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21 ***************************************/
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22 #include "compiler.h"
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23 #include "mem.h"
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24 #include "error_private.h"
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25 #define ZSTD_STATIC_LINKING_ONLY
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26 #include "zstd.h"
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27 #define FSE_STATIC_LINKING_ONLY
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28 #include "fse.h"
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29 #define HUF_STATIC_LINKING_ONLY
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30 #include "huf.h"
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31 #ifndef XXH_STATIC_LINKING_ONLY
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32 # define XXH_STATIC_LINKING_ONLY /* XXH64_state_t */
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33 #endif
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34 #include "xxhash.h" /* XXH_reset, update, digest */
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35
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36
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37 #if defined (__cplusplus)
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38 extern "C" {
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39 #endif
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40
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41
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42 /*-*************************************
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43 * Debug
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44 ***************************************/
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45 #if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=1)
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46 # include <assert.h>
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47 #else
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48 # ifndef assert
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49 # define assert(condition) ((void)0)
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50 # endif
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51 #endif
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52
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53 #define ZSTD_STATIC_ASSERT(c) { enum { ZSTD_static_assert = 1/(int)(!!(c)) }; }
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54
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55 #if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=2)
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56 # include <stdio.h>
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57 extern int g_debuglog_enable;
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58 /* recommended values for ZSTD_DEBUG display levels :
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59 * 1 : no display, enables assert() only
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60 * 2 : reserved for currently active debug path
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61 * 3 : events once per object lifetime (CCtx, CDict, etc.)
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62 * 4 : events once per frame
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63 * 5 : events once per block
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64 * 6 : events once per sequence (*very* verbose) */
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65 # define RAWLOG(l, ...) { \
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66 if ((g_debuglog_enable) & (l<=ZSTD_DEBUG)) { \
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67 fprintf(stderr, __VA_ARGS__); \
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68 } }
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69 # define DEBUGLOG(l, ...) { \
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70 if ((g_debuglog_enable) & (l<=ZSTD_DEBUG)) { \
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71 fprintf(stderr, __FILE__ ": " __VA_ARGS__); \
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72 fprintf(stderr, " \n"); \
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73 } }
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74 #else
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75 # define RAWLOG(l, ...) {} /* disabled */
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76 # define DEBUGLOG(l, ...) {} /* disabled */
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77 #endif
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78
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79
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80 /*-*************************************
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81 * shared macros
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82 ***************************************/
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83 #undef MIN
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84 #undef MAX
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85 #define MIN(a,b) ((a)<(b) ? (a) : (b))
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86 #define MAX(a,b) ((a)>(b) ? (a) : (b))
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87 #define CHECK_F(f) { size_t const errcod = f; if (ERR_isError(errcod)) return errcod; } /* check and Forward error code */
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88 #define CHECK_E(f, e) { size_t const errcod = f; if (ERR_isError(errcod)) return ERROR(e); } /* check and send Error code */
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89
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90
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91 /*-*************************************
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92 * Common constants
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93 ***************************************/
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94 #define ZSTD_OPT_NUM (1<<12)
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96 #define ZSTD_REP_NUM 3 /* number of repcodes */
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97 #define ZSTD_REP_MOVE (ZSTD_REP_NUM-1)
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98 static const U32 repStartValue[ZSTD_REP_NUM] = { 1, 4, 8 };
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99
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100 #define KB *(1 <<10)
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101 #define MB *(1 <<20)
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102 #define GB *(1U<<30)
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103
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104 #define BIT7 128
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105 #define BIT6 64
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106 #define BIT5 32
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107 #define BIT4 16
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108 #define BIT1 2
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109 #define BIT0 1
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110
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111 #define ZSTD_WINDOWLOG_ABSOLUTEMIN 10
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112 #define ZSTD_WINDOWLOG_DEFAULTMAX 27 /* Default maximum allowed window log */
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113 static const size_t ZSTD_fcs_fieldSize[4] = { 0, 2, 4, 8 };
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114 static const size_t ZSTD_did_fieldSize[4] = { 0, 1, 2, 4 };
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115
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116 #define ZSTD_FRAMEIDSIZE 4
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117 static const size_t ZSTD_frameIdSize = ZSTD_FRAMEIDSIZE; /* magic number size */
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118
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119 #define ZSTD_BLOCKHEADERSIZE 3 /* C standard doesn't allow `static const` variable to be init using another `static const` variable */
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120 static const size_t ZSTD_blockHeaderSize = ZSTD_BLOCKHEADERSIZE;
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121 typedef enum { bt_raw, bt_rle, bt_compressed, bt_reserved } blockType_e;
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122
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123 #define MIN_SEQUENCES_SIZE 1 /* nbSeq==0 */
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124 #define MIN_CBLOCK_SIZE (1 /*litCSize*/ + 1 /* RLE or RAW */ + MIN_SEQUENCES_SIZE /* nbSeq==0 */) /* for a non-null block */
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parents:
diff changeset
125
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
126 #define HufLog 12
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
127 typedef enum { set_basic, set_rle, set_compressed, set_repeat } symbolEncodingType_e;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
128
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
129 #define LONGNBSEQ 0x7F00
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
130
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
131 #define MINMATCH 3
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
132
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
133 #define Litbits 8
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
134 #define MaxLit ((1<<Litbits) - 1)
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
135 #define MaxML 52
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
136 #define MaxLL 35
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
137 #define DefaultMaxOff 28
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
138 #define MaxOff 31
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
139 #define MaxSeq MAX(MaxLL, MaxML) /* Assumption : MaxOff < MaxLL,MaxML */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
140 #define MLFSELog 9
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
141 #define LLFSELog 9
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
142 #define OffFSELog 8
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
143 #define MaxFSELog MAX(MAX(MLFSELog, LLFSELog), OffFSELog)
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
144
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
145 static const U32 LL_bits[MaxLL+1] = { 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
146 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
147 1, 1, 1, 1, 2, 2, 3, 3,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
148 4, 6, 7, 8, 9,10,11,12,
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
149 13,14,15,16 };
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
150 static const S16 LL_defaultNorm[MaxLL+1] = { 4, 3, 2, 2, 2, 2, 2, 2,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
151 2, 2, 2, 2, 2, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
152 2, 2, 2, 2, 2, 2, 2, 2,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
153 2, 3, 2, 1, 1, 1, 1, 1,
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
154 -1,-1,-1,-1 };
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
155 #define LL_DEFAULTNORMLOG 6 /* for static allocation */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
156 static const U32 LL_defaultNormLog = LL_DEFAULTNORMLOG;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
157
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
158 static const U32 ML_bits[MaxML+1] = { 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
159 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
160 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
161 0, 0, 0, 0, 0, 0, 0, 0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
162 1, 1, 1, 1, 2, 2, 3, 3,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
163 4, 4, 5, 7, 8, 9,10,11,
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
164 12,13,14,15,16 };
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
165 static const S16 ML_defaultNorm[MaxML+1] = { 1, 4, 3, 2, 2, 2, 2, 2,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
166 2, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
167 1, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
168 1, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
169 1, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
170 1, 1, 1, 1, 1, 1,-1,-1,
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
171 -1,-1,-1,-1,-1 };
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
172 #define ML_DEFAULTNORMLOG 6 /* for static allocation */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
173 static const U32 ML_defaultNormLog = ML_DEFAULTNORMLOG;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
174
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
175 static const S16 OF_defaultNorm[DefaultMaxOff+1] = { 1, 1, 1, 1, 1, 1, 2, 2,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
176 2, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
177 1, 1, 1, 1, 1, 1, 1, 1,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
178 -1,-1,-1,-1,-1 };
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
179 #define OF_DEFAULTNORMLOG 5 /* for static allocation */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
180 static const U32 OF_defaultNormLog = OF_DEFAULTNORMLOG;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
181
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
182
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
183 /*-*******************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
184 * Shared functions to include for inlining
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
185 *********************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
186 static void ZSTD_copy8(void* dst, const void* src) { memcpy(dst, src, 8); }
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
187 #define COPY8(d,s) { ZSTD_copy8(d,s); d+=8; s+=8; }
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
188
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
189 /*! ZSTD_wildcopy() :
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
190 * custom version of memcpy(), can overwrite up to WILDCOPY_OVERLENGTH bytes (if length==0) */
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
191 #define WILDCOPY_OVERLENGTH 8
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30434
diff changeset
192 MEM_STATIC void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length)
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
193 {
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
194 const BYTE* ip = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
195 BYTE* op = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
196 BYTE* const oend = op + length;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
197 do
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
198 COPY8(op, ip)
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
199 while (op < oend);
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
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
202 MEM_STATIC void ZSTD_wildcopy_e(void* dst, const void* src, void* dstEnd) /* should be faster for decoding, but strangely, not verified on all platform */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
203 {
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
204 const BYTE* ip = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
205 BYTE* op = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
206 BYTE* const oend = (BYTE*)dstEnd;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
207 do
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
208 COPY8(op, ip)
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
209 while (op < oend);
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
210 }
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
211
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
212
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
213 /*-*******************************************
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
214 * Private declarations
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
215 *********************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
216 typedef struct seqDef_s {
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
217 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
218 U16 litLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
219 U16 matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
220 } seqDef;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
221
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
222 typedef struct {
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
223 seqDef* sequencesStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
224 seqDef* sequences;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
225 BYTE* litStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
226 BYTE* lit;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
227 BYTE* llCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
228 BYTE* mlCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
229 BYTE* ofCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
230 U32 longLengthID; /* 0 == no longLength; 1 == Lit.longLength; 2 == Match.longLength; */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
231 U32 longLengthPos;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
232 } seqStore_t;
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
233
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
234 const seqStore_t* ZSTD_getSeqStore(const ZSTD_CCtx* ctx); /* compress & dictBuilder */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
235 void ZSTD_seqToCodes(const seqStore_t* seqStorePtr); /* compress, dictBuilder, decodeCorpus (shouldn't get its definition from here) */
30434
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 /* custom memory allocation functions */
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
238 void* ZSTD_malloc(size_t size, ZSTD_customMem customMem);
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
239 void* ZSTD_calloc(size_t size, ZSTD_customMem customMem);
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
240 void ZSTD_free(void* ptr, ZSTD_customMem customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
241
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
242
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
243 MEM_STATIC U32 ZSTD_highbit32(U32 val) /* compress, dictBuilder, decodeCorpus */
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
244 {
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
245 assert(val != 0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
246 {
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
247 # if defined(_MSC_VER) /* Visual */
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
248 unsigned long r=0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
249 _BitScanReverse(&r, val);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
250 return (unsigned)r;
30434
2e484bdea8c4 zstd: vendor zstd 1.1.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
251 # elif defined(__GNUC__) && (__GNUC__ >= 3) /* GCC Intrinsic */
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
252 return 31 - __builtin_clz(val);
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253 # else /* Software version */
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254 static const U32 DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 };
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255 U32 v = val;
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256 v |= v >> 1;
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257 v |= v >> 2;
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258 v |= v >> 4;
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259 v |= v >> 8;
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260 v |= v >> 16;
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261 return DeBruijnClz[(v * 0x07C4ACDDU) >> 27];
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262 # endif
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263 }
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264 }
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265
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266
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267 /* ZSTD_invalidateRepCodes() :
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268 * ensures next compression will not use repcodes from previous block.
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269 * Note : only works with regular variant;
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270 * do not use with extDict variant ! */
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271 void ZSTD_invalidateRepCodes(ZSTD_CCtx* cctx); /* zstdmt, adaptive_compression (shouldn't get this definition from here) */
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272
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273
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274 typedef struct {
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275 blockType_e blockType;
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276 U32 lastBlock;
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277 U32 origSize;
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278 } blockProperties_t;
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279
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280 /*! ZSTD_getcBlockSize() :
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281 * Provides the size of compressed block from block header `src` */
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282 /* Used by: decompress, fullbench (does not get its definition from here) */
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283 size_t ZSTD_getcBlockSize(const void* src, size_t srcSize,
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284 blockProperties_t* bpPtr);
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285
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286 #if defined (__cplusplus)
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287 }
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288 #endif
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289
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290 #endif /* ZSTD_CCOMMON_H_MODULE */