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deps: update brotli to v1.0.9
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Refs: https://github.com/google/brotli/releases/tag/v1.0.8
Refs: https://github.com/google/brotli/releases/tag/v1.0.9

PR-URL: #34937
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
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addaleax committed Sep 22, 2020
1 parent a5b4526 commit 481cced
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Showing 57 changed files with 3,895 additions and 2,388 deletions.
5 changes: 5 additions & 0 deletions deps/brotli/brotli.gyp
Expand Up @@ -29,7 +29,10 @@
],
'sources': [
# Common
'c/common/constants.c',
'c/common/context.c',
'c/common/dictionary.c',
'c/common/platform.c',
'c/common/transform.c',

# Decoder
Expand All @@ -45,12 +48,14 @@
'c/enc/block_splitter.c',
'c/enc/brotli_bit_stream.c',
'c/enc/cluster.c',
'c/enc/command.c',
'c/enc/compress_fragment.c',
'c/enc/compress_fragment_two_pass.c',
'c/enc/dictionary_hash.c',
'c/enc/encode.c',
'c/enc/encoder_dict.c',
'c/enc/entropy_encode.c',
'c/enc/fast_log.c',
'c/enc/histogram.c',
'c/enc/literal_cost.c',
'c/enc/memory.c',
Expand Down
15 changes: 15 additions & 0 deletions deps/brotli/c/common/constants.c
@@ -0,0 +1,15 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

#include "./constants.h"

const BrotliPrefixCodeRange
_kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = {
{1, 2}, {5, 2}, {9, 2}, {13, 2}, {17, 3}, {25, 3},
{33, 3}, {41, 3}, {49, 4}, {65, 4}, {81, 4}, {97, 4},
{113, 5}, {145, 5}, {177, 5}, {209, 5}, {241, 6}, {305, 6},
{369, 7}, {497, 8}, {753, 9}, {1265, 10}, {2289, 11}, {4337, 12},
{8433, 13}, {16625, 24}};
136 changes: 136 additions & 0 deletions deps/brotli/c/common/constants.h
Expand Up @@ -4,9 +4,18 @@
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/**
* @file
* Common constants used in decoder and encoder API.
*/

#ifndef BROTLI_COMMON_CONSTANTS_H_
#define BROTLI_COMMON_CONSTANTS_H_

#include "./platform.h"
#include <brotli/port.h>
#include <brotli/types.h>

/* Specification: 7.3. Encoding of the context map */
#define BROTLI_CONTEXT_MAP_MAX_RLE 16

Expand All @@ -29,12 +38,31 @@
#define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8

/* "Large Window Brotli" */

/**
* The theoretical maximum number of distance bits specified for large window
* brotli, for 64-bit encoders and decoders. Even when in practice 32-bit
* encoders and decoders only support up to 30 max distance bits, the value is
* set to 62 because it affects the large window brotli file format.
* Specifically, it affects the encoding of simple huffman tree for distances,
* see Specification RFC 7932 chapter 3.4.
*/
#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U
#define BROTLI_LARGE_MIN_WBITS 10
/**
* The maximum supported large brotli window bits by the encoder and decoder.
* Large window brotli allows up to 62 bits, however the current encoder and
* decoder, designed for 32-bit integers, only support up to 30 bits maximum.
*/
#define BROTLI_LARGE_MAX_WBITS 30

/* Specification: 4. Encoding of distances */
#define BROTLI_NUM_DISTANCE_SHORT_CODES 16
/**
* Maximal number of "postfix" bits.
*
* Number of "postfix" bits is stored as 2 bits in meta-block header.
*/
#define BROTLI_MAX_NPOSTFIX 3
#define BROTLI_MAX_NDIRECT 120
#define BROTLI_MAX_DISTANCE_BITS 24U
Expand All @@ -45,9 +73,22 @@
#define BROTLI_NUM_DISTANCE_SYMBOLS \
BROTLI_DISTANCE_ALPHABET_SIZE( \
BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS)

/* ((1 << 26) - 4) is the maximal distance that can be expressed in RFC 7932
brotli stream using NPOSTFIX = 0 and NDIRECT = 0. With other NPOSTFIX and
NDIRECT values distances up to ((1 << 29) + 88) could be expressed. */
#define BROTLI_MAX_DISTANCE 0x3FFFFFC

/* ((1 << 31) - 4) is the safe distance limit. Using this number as a limit
allows safe distance calculation without overflows, given the distance
alphabet size is limited to corresponding size
(see kLargeWindowDistanceCodeLimits). */
#define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC


/* Specification: 4. Encoding of Literal Insertion Lengths and Copy Lengths */
#define BROTLI_NUM_INS_COPY_CODES 24

/* 7.1. Context modes and context ID lookup for literals */
/* "context IDs for literals are in the range of 0..63" */
#define BROTLI_LITERAL_CONTEXT_BITS 6
Expand All @@ -61,4 +102,99 @@
#define BROTLI_WINDOW_GAP 16
#define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP)

typedef struct BrotliDistanceCodeLimit {
uint32_t max_alphabet_size;
uint32_t max_distance;
} BrotliDistanceCodeLimit;

/* This function calculates maximal size of distance alphabet, such that the
distances greater than the given values can not be represented.
This limits are designed to support fast and safe 32-bit decoders.
"32-bit" means that signed integer values up to ((1 << 31) - 1) could be
safely expressed.
Brotli distance alphabet symbols do not represent consecutive distance
ranges. Each distance alphabet symbol (excluding direct distances and short
codes), represent interleaved (for NPOSTFIX > 0) range of distances.
A "group" of consecutive (1 << NPOSTFIX) symbols represent non-interleaved
range. Two consecutive groups require the same amount of "extra bits".
It is important that distance alphabet represents complete "groups".
To avoid complex logic on encoder side about interleaved ranges
it was decided to restrict both sides to complete distance code "groups".
*/
BROTLI_UNUSED_FUNCTION BrotliDistanceCodeLimit BrotliCalculateDistanceCodeLimit(
uint32_t max_distance, uint32_t npostfix, uint32_t ndirect) {
BrotliDistanceCodeLimit result;
/* Marking this function as unused, because not all files
including "constants.h" use it -> compiler warns about that. */
BROTLI_UNUSED(&BrotliCalculateDistanceCodeLimit);
if (max_distance <= ndirect) {
/* This case never happens / exists only for the sake of completeness. */
result.max_alphabet_size = max_distance + BROTLI_NUM_DISTANCE_SHORT_CODES;
result.max_distance = max_distance;
return result;
} else {
/* The first prohibited value. */
uint32_t forbidden_distance = max_distance + 1;
/* Subtract "directly" encoded region. */
uint32_t offset = forbidden_distance - ndirect - 1;
uint32_t ndistbits = 0;
uint32_t tmp;
uint32_t half;
uint32_t group;
/* Postfix for the last dcode in the group. */
uint32_t postfix = (1u << npostfix) - 1;
uint32_t extra;
uint32_t start;
/* Remove postfix and "head-start". */
offset = (offset >> npostfix) + 4;
/* Calculate the number of distance bits. */
tmp = offset / 2;
/* Poor-man's log2floor, to avoid extra dependencies. */
while (tmp != 0) {ndistbits++; tmp = tmp >> 1;}
/* One bit is covered with subrange addressing ("half"). */
ndistbits--;
/* Find subrange. */
half = (offset >> ndistbits) & 1;
/* Calculate the "group" part of dcode. */
group = ((ndistbits - 1) << 1) | half;
/* Calculated "group" covers the prohibited distance value. */
if (group == 0) {
/* This case is added for correctness; does not occur for limit > 128. */
result.max_alphabet_size = ndirect + BROTLI_NUM_DISTANCE_SHORT_CODES;
result.max_distance = ndirect;
return result;
}
/* Decrement "group", so it is the last permitted "group". */
group--;
/* After group was decremented, ndistbits and half must be recalculated. */
ndistbits = (group >> 1) + 1;
/* The last available distance in the subrange has all extra bits set. */
extra = (1u << ndistbits) - 1;
/* Calculate region start. NB: ndistbits >= 1. */
start = (1u << (ndistbits + 1)) - 4;
/* Move to subregion. */
start += (group & 1) << ndistbits;
/* Calculate the alphabet size. */
result.max_alphabet_size = ((group << npostfix) | postfix) + ndirect +
BROTLI_NUM_DISTANCE_SHORT_CODES + 1;
/* Calculate the maximal distance representable by alphabet. */
result.max_distance = ((start + extra) << npostfix) + postfix + ndirect + 1;
return result;
}
}

/* Represents the range of values belonging to a prefix code:
[offset, offset + 2^nbits) */
typedef struct {
uint16_t offset;
uint8_t nbits;
} BrotliPrefixCodeRange;

/* "Soft-private", it is exported, but not "advertised" as API. */
BROTLI_COMMON_API extern const BrotliPrefixCodeRange
_kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS];

#endif /* BROTLI_COMMON_CONSTANTS_H_ */
156 changes: 156 additions & 0 deletions deps/brotli/c/common/context.c
@@ -0,0 +1,156 @@
#include "./context.h"

#include <brotli/types.h>

/* Common context lookup table for all context modes. */
const uint8_t _kBrotliContextLookupTable[2048] = {
/* CONTEXT_LSB6, last byte. */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,

/* CONTEXT_LSB6, second last byte, */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

/* CONTEXT_MSB6, last byte. */
0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11,
12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15,
16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19,
20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27,
28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35,
36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39,
40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43,
44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47,
48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51,
52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55,
56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59,
60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63,

/* CONTEXT_MSB6, second last byte, */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

/* CONTEXT_UTF8, last byte. */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12,
44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12,
12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48,
52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12,
12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56,
60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12, 0,
/* UTF8 continuation byte range. */
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
/* UTF8 lead byte range. */
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,

/* CONTEXT_UTF8 second last byte. */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0,
/* UTF8 continuation byte range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* UTF8 lead byte range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

/* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */
0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56,

/* CONTEXT_SIGNED, second last byte. */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
};

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