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Add binary MO translation file support. Add brotli decoder and WOFF2 support.

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Use smaller .mo files instead of .po, if gettext is available.
Convert editor fonts to .woff2 format.
This commit is contained in:
bruvzg 2022-03-25 19:31:09 +02:00
parent 56e0c38c27
commit fd2fba7c2c
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GPG key ID: 7960FCF39844EC38
54 changed files with 14713 additions and 150 deletions
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11
COPYRIGHT.txt
View file

@ -127,6 +127,11 @@ Copyright: 2007, Starbreeze Studios
2014-2022, Godot Engine contributors.
License: Expat and Zlib
Files: ./thirdparty/brotli/
Comment: Brotli
Copyright: 2009, 2010, 2013-2016 by the Brotli Authors.
License: Expat
Files: ./thirdparty/bullet/
Comment: Bullet Continuous Collision Detection and Physics Library
Copyright: 2003-2013, Erwin Coumans
@ -158,17 +163,17 @@ Comment: Etc2Comp
Copyright: 2015, Etc2Comp Authors
License: Apache-2.0
Files: ./thirdparty/fonts/DroidSans*.ttf
Files: ./thirdparty/fonts/DroidSans*.woff2
Comment: DroidSans font
Copyright: 2008, The Android Open Source Project
License: Apache-2.0
Files: ./thirdparty/fonts/NotoSans*.ttf
Files: ./thirdparty/fonts/NotoSans*.woff2
Comment: Noto Sans font
Copyright: 2012, Google Inc.
License: OFL-1.1
Files: ./thirdparty/fonts/Hack_Regular.ttf
Files: ./thirdparty/fonts/Hack_Regular.woff2
Comment: Hack font
Copyright: 2018, Source Foundry Authors
2003, Bitstream Inc.

100
core/io/translation_loader_po.cpp
View file

@ -34,6 +34,93 @@
#include "core/translation.h"
RES TranslationLoaderPO::load_translation(FileAccess *f, bool p_use_context, Error *r_error) {
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
const String path = f->get_path();
Ref<Translation> translation;
if (p_use_context) {
translation = Ref<Translation>(memnew(ContextTranslation));
} else {
translation.instance();
}
String config;
uint32_t magic = f->get_32();
if (magic == 0x950412de) {
// Load binary MO file.
uint16_t version_maj = f->get_16();
uint16_t version_min = f->get_16();
if (version_maj > 1) {
ERR_FAIL_V_MSG(RES(), vformat("Unsupported MO file %s, version %d.%d.", path, version_maj, version_min));
}
uint32_t num_strings = f->get_32();
uint32_t id_table_offset = f->get_32();
uint32_t trans_table_offset = f->get_32();
// Read string tables.
for (uint32_t i = 0; i < num_strings; i++) {
String msg_id;
String msg_context;
// Read id strings and context.
{
Vector<uint8_t> data;
f->seek(id_table_offset + i * 8);
uint32_t str_start = 0;
uint32_t str_len = f->get_32();
uint32_t str_offset = f->get_32();
data.resize(str_len + 1);
f->seek(str_offset);
f->get_buffer(data.ptrw(), str_len);
data.write[str_len] = 0;
for (uint32_t j = 0; j < str_len + 1; j++) {
if (data[j] == 0x04) {
msg_context.parse_utf8((const char *)data.ptr(), j);
str_start = j + 1;
}
if (data[j] == 0x00) {
msg_id.parse_utf8((const char *)(data.ptr() + str_start), j - str_start);
break;
}
}
}
// Read translated strings.
{
Vector<uint8_t> data;
f->seek(trans_table_offset + i * 8);
uint32_t str_len = f->get_32();
uint32_t str_offset = f->get_32();
data.resize(str_len + 1);
f->seek(str_offset);
f->get_buffer(data.ptrw(), str_len);
data.write[str_len] = 0;
if (msg_id.empty()) {
config = String::utf8((const char *)data.ptr(), str_len);
} else {
for (uint32_t j = 0; j < str_len + 1; j++) {
if (data[j] == 0x00) {
translation->add_context_message(msg_id, String::utf8((const char *)data.ptr(), j), msg_context);
break;
}
}
}
}
}
memdelete(f);
} else {
// Try to load as text PO file.
f->seek(0);
enum Status {
STATUS_NONE,
STATUS_READING_ID,
@ -46,24 +133,16 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, bool p_use_context, Err
String msg_id;
String msg_str;
String msg_context;
String config;
if (r_error) {
*r_error = ERR_FILE_CORRUPT;
}
Ref<Translation> translation;
if (p_use_context) {
translation = Ref<Translation>(memnew(ContextTranslation));
} else {
translation.instance();
}
int line = 1;
bool entered_context = false;
bool skip_this = false;
bool skip_next = false;
bool is_eof = false;
const String path = f->get_path();
while (!is_eof) {
String l = f->get_line().strip_edges();
@ -197,6 +276,7 @@ RES TranslationLoaderPO::load_translation(FileAccess *f, bool p_use_context, Err
config = msg_str;
}
}
}
ERR_FAIL_COND_V_MSG(config == "", RES(), "No config found in file: " + path + ".");
@ -235,13 +315,15 @@ RES TranslationLoaderPO::load(const String &p_path, const String &p_original_pat
void TranslationLoaderPO::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("po");
p_extensions->push_back("mo");
}
bool TranslationLoaderPO::handles_type(const String &p_type) const {
return (p_type == "Translation");
}
String TranslationLoaderPO::get_resource_type(const String &p_path) const {
if (p_path.get_extension().to_lower() == "po") {
if (p_path.get_extension().to_lower() == "po" || p_path.get_extension().to_lower() == "mo") {
return "Translation";
}
return "";

2
doc/classes/DynamicFont.xml
View file

@ -5,7 +5,7 @@
</brief_description>
<description>
DynamicFont renders vector font files dynamically at runtime instead of using a prerendered texture atlas like [BitmapFont]. This trades the faster loading time of [BitmapFont]s for the ability to change font parameters like size and spacing during runtime. [DynamicFontData] is used for referencing the font file paths. DynamicFont also supports defining one or more fallback fonts, which will be used when displaying a character not supported by the main font.
DynamicFont uses the [url=https://www.freetype.org/]FreeType[/url] library for rasterization. Supported formats are TrueType ([code].ttf[/code]), OpenType ([code].otf[/code]) and Web Open Font Format 1 ([code].woff[/code]). Web Open Font Format 2 ([code].woff2[/code]) is [i]not[/i] supported.
DynamicFont uses the [url=https://www.freetype.org/]FreeType[/url] library for rasterization. Supported formats are TrueType ([code].ttf[/code]), OpenType ([code].otf[/code]), Web Open Font Format 1 ([code].woff[/code]), and Web Open Font Format 2 ([code].woff2[/code]).
[codeblock]
var dynamic_font = DynamicFont.new()
dynamic_font.font_data = load("res://BarlowCondensed-Bold.ttf")

2
editor/SCsub
View file

@ -95,6 +95,8 @@ if env["tools"]:
# Fonts
flist = glob.glob(env.Dir("#thirdparty").abspath + "/fonts/*.ttf")
flist.extend(glob.glob(env.Dir("#thirdparty").abspath + "/fonts/*.otf"))
flist.extend(glob.glob(env.Dir("#thirdparty").abspath + "/fonts/*.woff"))
flist.extend(glob.glob(env.Dir("#thirdparty").abspath + "/fonts/*.woff2"))
flist.sort()
env.Depends("#editor/builtin_fonts.gen.h", flist)
env.CommandNoCache("#editor/builtin_fonts.gen.h", flist, run_in_subprocess(editor_builders.make_fonts_header))

34
editor/editor_builders.py
View file

@ -5,6 +5,10 @@ All such functions are invoked in a subprocess on Windows to prevent build flaki
"""
import os
import os.path
import shutil
import subprocess
import tempfile
import uuid
from platform_methods import subprocess_main
from compat import encode_utf8, byte_to_str, open_utf8
@ -89,10 +93,40 @@ def make_translations_header(target, source, env, category):
sorted_paths = sorted(source, key=lambda path: os.path.splitext(os.path.basename(path))[0])
msgfmt_available = shutil.which("msgfmt") is not None
if not msgfmt_available:
print("WARNING: msgfmt is not found, using .po files instead of .mo")
xl_names = []
for i in range(len(sorted_paths)):
if msgfmt_available:
mo_path = os.path.join(tempfile.gettempdir(), uuid.uuid4().hex + ".mo")
cmd = "msgfmt " + sorted_paths[i] + " --no-hash -o " + mo_path
try:
subprocess.Popen(cmd, shell=True, stderr=subprocess.PIPE).communicate()
with open(mo_path, "rb") as f:
buf = f.read()
except OSError as e:
print(
"WARNING: msgfmt execution failed, using .po file instead of .mo: path=%r; [%s] %s"
% (sorted_paths[i], e.__class__.__name__, e)
)
with open(sorted_paths[i], "rb") as f:
buf = f.read()
finally:
try:
os.remove(mo_path)
except OSError as e:
# Do not fail the entire build if it cannot delete a temporary file
print(
"WARNING: Could not delete temporary .mo file: path=%r; [%s] %s"
% (mo_path, e.__class__.__name__, e)
)
else:
with open(sorted_paths[i], "rb") as f:
buf = f.read()
decomp_size = len(buf)
buf = zlib.compress(buf)
name = os.path.splitext(os.path.basename(sorted_paths[i]))[0]

6
editor/editor_settings.cpp
View file

@ -317,11 +317,11 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
hints["interface/editor/font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/font_hinting", PROPERTY_HINT_ENUM, "Auto (Light),None,Light,Normal", PROPERTY_USAGE_DEFAULT);
#endif
_initial_set("interface/editor/main_font", "");
hints["interface/editor/main_font"] = PropertyInfo(Variant::STRING, "interface/editor/main_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff", PROPERTY_USAGE_DEFAULT);
hints["interface/editor/main_font"] = PropertyInfo(Variant::STRING, "interface/editor/main_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff,*.woff2", PROPERTY_USAGE_DEFAULT);
_initial_set("interface/editor/main_font_bold", "");
hints["interface/editor/main_font_bold"] = PropertyInfo(Variant::STRING, "interface/editor/main_font_bold", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff", PROPERTY_USAGE_DEFAULT);
hints["interface/editor/main_font_bold"] = PropertyInfo(Variant::STRING, "interface/editor/main_font_bold", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff,*.woff2", PROPERTY_USAGE_DEFAULT);
_initial_set("interface/editor/code_font", "");
hints["interface/editor/code_font"] = PropertyInfo(Variant::STRING, "interface/editor/code_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff", PROPERTY_USAGE_DEFAULT);
hints["interface/editor/code_font"] = PropertyInfo(Variant::STRING, "interface/editor/code_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf,*.woff,*.woff2", PROPERTY_USAGE_DEFAULT);
_initial_set("interface/editor/dim_editor_on_dialog_popup", true);
_initial_set("interface/editor/low_processor_mode_sleep_usec", 6900); // ~144 FPS
hints["interface/editor/low_processor_mode_sleep_usec"] = PropertyInfo(Variant::REAL, "interface/editor/low_processor_mode_sleep_usec", PROPERTY_HINT_RANGE, "1,100000,1", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);

17
modules/freetype/SCsub
View file

@ -59,6 +59,23 @@ if env["builtin_freetype"]:
]
thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
thirdparty_brotli_dir = "#thirdparty/brotli/"
thirdparty_brotli_sources = [
"common/constants.c",
"common/context.c",
"common/dictionary.c",
"common/platform.c",
"common/shared_dictionary.c",
"common/transform.c",
"dec/bit_reader.c",
"dec/decode.c",
"dec/huffman.c",
"dec/state.c",
]
thirdparty_sources += [thirdparty_brotli_dir + file for file in thirdparty_brotli_sources]
env_freetype.Append(CPPDEFINES=["FT_CONFIG_OPTION_USE_BROTLI"])
env_freetype.Prepend(CPPPATH=[thirdparty_brotli_dir + "include"])
if env["platform"] == "uwp":
# Include header for UWP to fix build issues
env_freetype.Append(CCFLAGS=["/FI", '"modules/freetype/uwpdef.h"'])

6
scene/resources/dynamic_font.cpp
View file

@ -114,7 +114,7 @@ void DynamicFontData::_bind_methods() {
BIND_ENUM_CONSTANT(HINTING_NORMAL);
// Only WOFF1 is supported as WOFF2 requires a Brotli decompression library to be linked.
ADD_PROPERTY(PropertyInfo(Variant::STRING, "font_path", PROPERTY_HINT_FILE, "*.ttf,*.otf,*.woff"), "set_font_path", "get_font_path");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "font_path", PROPERTY_HINT_FILE, "*.ttf,*.otf,*.woff,*.woff2"), "set_font_path", "get_font_path");
}
DynamicFontData::DynamicFontData() {
@ -1185,8 +1185,8 @@ RES ResourceFormatLoaderDynamicFont::load(const String &p_path, const String &p_
void ResourceFormatLoaderDynamicFont::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("ttf");
p_extensions->push_back("otf");
// Only WOFF1 is supported as WOFF2 requires a Brotli decompression library to be linked.
p_extensions->push_back("woff");
p_extensions->push_back("woff2");
}
bool ResourceFormatLoaderDynamicFont::handles_type(const String &p_type) const {
@ -1195,7 +1195,7 @@ bool ResourceFormatLoaderDynamicFont::handles_type(const String &p_type) const {
String ResourceFormatLoaderDynamicFont::get_resource_type(const String &p_path) const {
String el = p_path.get_extension().to_lower();
if (el == "ttf" || el == "otf" || el == "woff") {
if (el == "ttf" || el == "otf" || el == "woff" || el == "woff2") {
return "DynamicFontData";
}
return "";

19
thirdparty/README.md vendored
View file

@ -5,6 +5,18 @@ respective folder names. Use two empty lines to separate categories for
readability.
## brotli
- Upstream: https://github.com/google/brotli
- Version: git (f4153a09f87cbb9c826d8fc12c74642bb2d879ea, 2022)
- License: MIT
Files extracted from upstream source:
- `common/`, `dec/` and `include/` folders
- `LICENSE`
## bullet
- Upstream: https://github.com/bulletphysics/bullet3
@ -99,20 +111,21 @@ comments.
## fonts
- `NotoSans*.ttf`, `NotoNaskhArabicUI_Regular.ttf`:
- `NotoSans*.woff2`, `NotoNaskhArabicUI_Regular.woff2`:
* Upstream: https://github.com/googlei18n/noto-fonts
* Version: 1.06 (2017)
* License: OFL-1.1
* Comment: Use UI font variant if available, because it has tight vertical metrics and
good for UI.
- `Hack_Regular.ttf`:
- `Hack_Regular.woff2`:
* Upstream: https://github.com/source-foundry/Hack
* Version: 3.003 (2018)
* License: MIT + Bitstream Vera License
- `DroidSans*.ttf`:
- `DroidSans*.woff2`:
* Upstream: https://android.googlesource.com/platform/frameworks/base/+/master/data/fonts/
* Version: ? (pre-2014 commit when DroidSansJapanese.ttf was obsoleted)
* License: Apache 2.0
- All fonts are converted from the `.ttf` sources using `https://github.com/google/woff2` tool.
## freetype

19
thirdparty/brotli/LICENSE vendored Normal file
View file

@ -0,0 +1,19 @@
Copyright (c) 2009, 2010, 2013-2016 by the Brotli Authors.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

15
thirdparty/brotli/common/constants.c vendored Normal file
View file

@ -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}};

200
thirdparty/brotli/common/constants.h vendored Normal file
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@ -0,0 +1,200 @@
/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
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
/* Specification: 2. Compressed representation overview */
#define BROTLI_MAX_NUMBER_OF_BLOCK_TYPES 256
/* Specification: 3.3. Alphabet sizes: insert-and-copy length */
#define BROTLI_NUM_LITERAL_SYMBOLS 256
#define BROTLI_NUM_COMMAND_SYMBOLS 704
#define BROTLI_NUM_BLOCK_LEN_SYMBOLS 26
#define BROTLI_MAX_CONTEXT_MAP_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + \
BROTLI_CONTEXT_MAP_MAX_RLE)
#define BROTLI_MAX_BLOCK_TYPE_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + 2)
/* Specification: 3.5. Complex prefix codes */
#define BROTLI_REPEAT_PREVIOUS_CODE_LENGTH 16
#define BROTLI_REPEAT_ZERO_CODE_LENGTH 17
#define BROTLI_CODE_LENGTH_CODES (BROTLI_REPEAT_ZERO_CODE_LENGTH + 1)
/* "code length of 8 is repeated" */
#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
#define BROTLI_DISTANCE_ALPHABET_SIZE(NPOSTFIX, NDIRECT, MAXNBITS) ( \
BROTLI_NUM_DISTANCE_SHORT_CODES + (NDIRECT) + \
((MAXNBITS) << ((NPOSTFIX) + 1)))
/* BROTLI_NUM_DISTANCE_SYMBOLS == 1128 */
#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
/* 7.2. Context ID for distances */
#define BROTLI_DISTANCE_CONTEXT_BITS 2
/* 9.1. Format of the Stream Header */
/* Number of slack bytes for window size. Don't confuse
with BROTLI_NUM_DISTANCE_SHORT_CODES. */
#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_ */

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#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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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Lookup table to map the previous two bytes to a context id.
There are four different context modeling modes defined here:
CONTEXT_LSB6: context id is the least significant 6 bits of the last byte,
CONTEXT_MSB6: context id is the most significant 6 bits of the last byte,
CONTEXT_UTF8: second-order context model tuned for UTF8-encoded text,
CONTEXT_SIGNED: second-order context model tuned for signed integers.
If |p1| and |p2| are the previous two bytes, and |mode| is current context
mode, we calculate the context as:
context = ContextLut(mode)[p1] | ContextLut(mode)[p2 + 256].
For CONTEXT_UTF8 mode, if the previous two bytes are ASCII characters
(i.e. < 128), this will be equivalent to
context = 4 * context1(p1) + context2(p2),
where context1 is based on the previous byte in the following way:
0 : non-ASCII control
1 : \t, \n, \r
2 : space
3 : other punctuation
4 : " '
5 : %
6 : ( < [ {
7 : ) > ] }
8 : , ; :
9 : .
10 : =
11 : number
12 : upper-case vowel
13 : upper-case consonant
14 : lower-case vowel
15 : lower-case consonant
and context2 is based on the second last byte:
0 : control, space
1 : punctuation
2 : upper-case letter, number
3 : lower-case letter
If the last byte is ASCII, and the second last byte is not (in a valid UTF8
stream it will be a continuation byte, value between 128 and 191), the
context is the same as if the second last byte was an ASCII control or space.
If the last byte is a UTF8 lead byte (value >= 192), then the next byte will
be a continuation byte and the context id is 2 or 3 depending on the LSB of
the last byte and to a lesser extent on the second last byte if it is ASCII.
If the last byte is a UTF8 continuation byte, the second last byte can be:
- continuation byte: the next byte is probably ASCII or lead byte (assuming
4-byte UTF8 characters are rare) and the context id is 0 or 1.
- lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1
- lead byte (208 - 255): next byte is continuation byte, context is 2 or 3
The possible value combinations of the previous two bytes, the range of
context ids and the type of the next byte is summarized in the table below:
|--------\-----------------------------------------------------------------|
| \ Last byte |
| Second \---------------------------------------------------------------|
| last byte \ ASCII | cont. byte | lead byte |
| \ (0-127) | (128-191) | (192-) |
|=============|===================|=====================|==================|
| ASCII | next: ASCII/lead | not valid | next: cont. |
| (0-127) | context: 4 - 63 | | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. |
| (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: ASCII/lead | not valid |
| (192-207) | | context: 0 - 1 | |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: cont. | not valid |
| (208-) | | context: 2 - 3 | |
|-------------|-------------------|---------------------|------------------|
*/
#ifndef BROTLI_COMMON_CONTEXT_H_
#define BROTLI_COMMON_CONTEXT_H_
#include <brotli/port.h>
#include <brotli/types.h>
typedef enum ContextType {
CONTEXT_LSB6 = 0,
CONTEXT_MSB6 = 1,
CONTEXT_UTF8 = 2,
CONTEXT_SIGNED = 3
} ContextType;
/* "Soft-private", it is exported, but not "advertised" as API. */
/* Common context lookup table for all context modes. */
BROTLI_COMMON_API extern const uint8_t _kBrotliContextLookupTable[2048];
typedef const uint8_t* ContextLut;
/* typeof(MODE) == ContextType; returns ContextLut */
#define BROTLI_CONTEXT_LUT(MODE) (&_kBrotliContextLookupTable[(MODE) << 9])
/* typeof(LUT) == ContextLut */
#define BROTLI_CONTEXT(P1, P2, LUT) ((LUT)[P1] | ((LUT) + 256)[P2])
#endif /* BROTLI_COMMON_CONTEXT_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Collection of static dictionary words. */
#ifndef BROTLI_COMMON_DICTIONARY_H_
#define BROTLI_COMMON_DICTIONARY_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
typedef struct BrotliDictionary {
/**
* Number of bits to encode index of dictionary word in a bucket.
*
* Specification: Appendix A. Static Dictionary Data
*
* Words in a dictionary are bucketed by length.
* @c 0 means that there are no words of a given length.
* Dictionary consists of words with length of [4..24] bytes.
* Values at [0..3] and [25..31] indices should not be addressed.
*/
uint8_t size_bits_by_length[32];
/* assert(offset[i + 1] == offset[i] + (bits[i] ? (i << bits[i]) : 0)) */
uint32_t offsets_by_length[32];
/* assert(data_size == offsets_by_length[31]) */
size_t data_size;
/* Data array is not bound, and should obey to size_bits_by_length values.
Specified size matches default (RFC 7932) dictionary. Its size is
defined by data_size */
const uint8_t* data;
} BrotliDictionary;
BROTLI_COMMON_API const BrotliDictionary* BrotliGetDictionary(void);
/**
* Sets dictionary data.
*
* When dictionary data is already set / present, this method is no-op.
*
* Dictionary data MUST be provided before BrotliGetDictionary is invoked.
* This method is used ONLY in multi-client environment (e.g. C + Java),
* to reduce storage by sharing single dictionary between implementations.
*/
BROTLI_COMMON_API void BrotliSetDictionaryData(const uint8_t* data);
#define BROTLI_MIN_DICTIONARY_WORD_LENGTH 4
#define BROTLI_MAX_DICTIONARY_WORD_LENGTH 24
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_COMMON_DICTIONARY_H_ */

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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#include <stdlib.h>
#include "platform.h"
#include <brotli/types.h>
/* Default brotli_alloc_func */
void* BrotliDefaultAllocFunc(void* opaque, size_t size) {
BROTLI_UNUSED(opaque);
return malloc(size);
}
/* Default brotli_free_func */
void BrotliDefaultFreeFunc(void* opaque, void* address) {
BROTLI_UNUSED(opaque);
free(address);
}

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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific features and build options.
Build options are:
* BROTLI_BUILD_32_BIT disables 64-bit optimizations
* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
read and overlapping memcpy; this reduces decompression speed by 5%
* BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
* BROTLI_DEBUG dumps file name and line number when decoder detects stream
or memory error
* BROTLI_ENABLE_LOG enables asserts and dumps various state information
*/
#ifndef BROTLI_COMMON_PLATFORM_H_
#define BROTLI_COMMON_PLATFORM_H_
#include <string.h> /* memcpy */
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__)
#include <endian.h>
#elif defined(OS_FREEBSD)
#include <machine/endian.h>
#elif defined(OS_MACOSX)
#include <machine/endian.h>
/* Let's try and follow the Linux convention */
#define BROTLI_X_BYTE_ORDER BYTE_ORDER
#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN
#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
#endif
#if BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
#include <intrin.h>
#endif
#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
#include <assert.h>
#include <stdio.h>
#endif
/* The following macros were borrowed from https://github.com/nemequ/hedley
* with permission of original author - Evan Nemerson <evan@nemerson.com> */
/* >>> >>> >>> hedley macros */
/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable
compilers.
To apply compiler hint, enclose the branching condition into macros, like this:
if (BROTLI_PREDICT_TRUE(zero == 0)) {
// main execution path
} else {
// compiler should place this code outside of main execution path
}
OR:
if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) {
// compiler should place this code outside of main execution path
}
*/
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(7, 3, 0) || \
BROTLI_TINYC_VERSION_CHECK(0, 9, 27)
#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0))
#else
#define BROTLI_PREDICT_FALSE(x) (x)
#define BROTLI_PREDICT_TRUE(x) (x)
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!defined(__cplusplus)
#define BROTLI_RESTRICT restrict
#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \
BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \
(BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus))
#define BROTLI_RESTRICT __restrict
#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus)
#define BROTLI_RESTRICT _Restrict
#else
#define BROTLI_RESTRICT
#endif
#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
(defined(__cplusplus) && (__cplusplus >= 199711L))
#define BROTLI_MAYBE_INLINE inline
#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \
BROTLI_ARM_VERSION_CHECK(6, 2, 0)
#define BROTLI_MAYBE_INLINE __inline__
#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0)
#define BROTLI_MAYBE_INLINE __inline
#else
#define BROTLI_MAYBE_INLINE
#endif
#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__))
#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline
#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced")
#else
#define BROTLI_INLINE BROTLI_MAYBE_INLINE
#endif
#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
#define BROTLI_NOINLINE __attribute__((__noinline__))
#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0)
#define BROTLI_NOINLINE __declspec(noinline)
#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0)
#define BROTLI_NOINLINE _Pragma("noinline")
#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus)
#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;")
#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
#define BROTLI_NOINLINE _Pragma("inline=never")
#else
#define BROTLI_NOINLINE
#endif
/* <<< <<< <<< end of hedley macros. */
#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused))
#else
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE
#endif
#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
#define BROTLI_ALIGNED(N) __attribute__((aligned(N)))
#else
#define BROTLI_ALIGNED(N)
#endif
#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \
(defined(M_ARM) && (M_ARM == 7))
#define BROTLI_TARGET_ARMV7
#endif /* ARMv7 */
#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \
defined(__aarch64__) || defined(__ARM64_ARCH_8__)
#define BROTLI_TARGET_ARMV8_ANY
#if defined(__ARM_32BIT_STATE)
#define BROTLI_TARGET_ARMV8_32
#elif defined(__ARM_64BIT_STATE)
#define BROTLI_TARGET_ARMV8_64
#endif
#endif /* ARMv8 */
#if defined(__ARM_NEON__) || defined(__ARM_NEON)
#define BROTLI_TARGET_NEON
#endif
#if defined(__i386) || defined(_M_IX86)
#define BROTLI_TARGET_X86
#endif
#if defined(__x86_64__) || defined(_M_X64)
#define BROTLI_TARGET_X64
#endif
#if defined(__PPC64__)
#define BROTLI_TARGET_POWERPC64
#endif
#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
#define BROTLI_TARGET_RISCV64
#endif
#if defined(BROTLI_BUILD_64_BIT)
#define BROTLI_64_BITS 1
#elif defined(BROTLI_BUILD_32_BIT)
#define BROTLI_64_BITS 0
#elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \
defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64)
#define BROTLI_64_BITS 1
#else
#define BROTLI_64_BITS 0
#endif
#if (BROTLI_64_BITS)
#define brotli_reg_t uint64_t
#else
#define brotli_reg_t uint32_t
#endif
#if defined(BROTLI_BUILD_BIG_ENDIAN)
#define BROTLI_BIG_ENDIAN 1
#elif defined(BROTLI_BUILD_LITTLE_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL)
/* Just break elif chain. */
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(_WIN32) || defined(BROTLI_TARGET_X64)
/* Win32 & x64 can currently always be assumed to be little endian */
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define BROTLI_BIG_ENDIAN 1
#elif defined(BROTLI_X_BYTE_ORDER)
#if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN
#define BROTLI_LITTLE_ENDIAN 1
#elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN
#define BROTLI_BIG_ENDIAN 1
#endif
#endif /* BROTLI_X_BYTE_ORDER */
#if !defined(BROTLI_LITTLE_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 0
#endif
#if !defined(BROTLI_BIG_ENDIAN)
#define BROTLI_BIG_ENDIAN 0
#endif
#if defined(BROTLI_X_BYTE_ORDER)
#undef BROTLI_X_BYTE_ORDER
#undef BROTLI_X_LITTLE_ENDIAN
#undef BROTLI_X_BIG_ENDIAN
#endif
#if defined(BROTLI_BUILD_PORTABLE)
#define BROTLI_ALIGNED_READ (!!1)
#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \
defined(BROTLI_TARGET_RISCV64)
/* Allow unaligned read only for white-listed CPUs. */
#define BROTLI_ALIGNED_READ (!!0)
#else
#define BROTLI_ALIGNED_READ (!!1)
#endif
#if BROTLI_ALIGNED_READ
/* Portable unaligned memory access: read / write values via memcpy. */
static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
uint16_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
uint32_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
uint64_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
memcpy(p, &v, sizeof v);
}
#else /* BROTLI_ALIGNED_READ */
/* Unaligned memory access is allowed: just cast pointer to requested type. */
#if BROTLI_SANITIZED
/* Consider we have an unaligned load/store of 4 bytes from address 0x...05.
AddressSanitizer will treat it as a 3-byte access to the range 05:07 and
will miss a bug if 08 is the first unaddressable byte.
ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will
miss a race between this access and some other accesses to 08.
MemorySanitizer will correctly propagate the shadow on unaligned stores
and correctly report bugs on unaligned loads, but it may not properly
update and report the origin of the uninitialized memory.
For all three tools, replacing an unaligned access with a tool-specific
callback solves the problem. */
#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */
uint16_t __sanitizer_unaligned_load16(const void* p);
uint32_t __sanitizer_unaligned_load32(const void* p);
uint64_t __sanitizer_unaligned_load64(const void* p);
void __sanitizer_unaligned_store64(void* p, uint64_t v);
#if defined(__cplusplus)
} /* extern "C" */
#endif /* __cplusplus */
#define BrotliUnalignedRead16 __sanitizer_unaligned_load16
#define BrotliUnalignedRead32 __sanitizer_unaligned_load32
#define BrotliUnalignedRead64 __sanitizer_unaligned_load64
#define BrotliUnalignedWrite64 __sanitizer_unaligned_store64
#else /* BROTLI_SANITIZED */
static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
return *(const uint16_t*)p;
}
static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
return *(const uint32_t*)p;
}
#if (BROTLI_64_BITS)
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
return *(const uint64_t*)p;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
*(uint64_t*)p = v;
}
#else /* BROTLI_64_BITS */
/* Avoid emitting LDRD / STRD, which require properly aligned address. */
/* If __attribute__(aligned) is available, use that. Otherwise, memcpy. */
#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
typedef BROTLI_ALIGNED(1) uint64_t brotli_unaligned_uint64_t;
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
return (uint64_t) ((const brotli_unaligned_uint64_t*) p)[0];
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p;
dwords[0] = (brotli_unaligned_uint64_t) v;
}
#else /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
uint64_t v;
memcpy(&v, p, sizeof(uint64_t));
return v;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
memcpy(p, &v, sizeof(uint64_t));
}
#endif /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
#endif /* BROTLI_64_BITS */
#endif /* BROTLI_SANITIZED */
#endif /* BROTLI_ALIGNED_READ */
#if BROTLI_LITTLE_ENDIAN
/* Straight endianness. Just read / write values. */
#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16
#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32
#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64
#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64
#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */
/* Explain compiler to byte-swap values. */
#define BROTLI_BSWAP16_(V) ((uint16_t)( \
(((V) & 0xFFU) << 8) | \
(((V) >> 8) & 0xFFU)))
static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
uint16_t value = BrotliUnalignedRead16(p);
return BROTLI_BSWAP16_(value);
}
#define BROTLI_BSWAP32_(V) ( \
(((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \
(((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU))
static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
uint32_t value = BrotliUnalignedRead32(p);
return BROTLI_BSWAP32_(value);
}
#define BROTLI_BSWAP64_(V) ( \
(((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \
(((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \
(((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \
(((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU))
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
uint64_t value = BrotliUnalignedRead64(p);
return BROTLI_BSWAP64_(value);
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
uint64_t value = BROTLI_BSWAP64_(v);
BrotliUnalignedWrite64(p, value);
}
#else /* BROTLI_LITTLE_ENDIAN */
/* Read / store values byte-wise; hopefully compiler will understand. */
static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
return (uint16_t)(in[0] | (in[1] << 8));
}
static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
uint32_t value = (uint32_t)(in[0]);
value |= (uint32_t)(in[1]) << 8;
value |= (uint32_t)(in[2]) << 16;
value |= (uint32_t)(in[3]) << 24;
return value;
}
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
uint64_t value = (uint64_t)(in[0]);
value |= (uint64_t)(in[1]) << 8;
value |= (uint64_t)(in[2]) << 16;
value |= (uint64_t)(in[3]) << 24;
value |= (uint64_t)(in[4]) << 32;
value |= (uint64_t)(in[5]) << 40;
value |= (uint64_t)(in[6]) << 48;
value |= (uint64_t)(in[7]) << 56;
return value;
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
uint8_t* out = (uint8_t*)p;
out[0] = (uint8_t)v;
out[1] = (uint8_t)(v >> 8);
out[2] = (uint8_t)(v >> 16);
out[3] = (uint8_t)(v >> 24);
out[4] = (uint8_t)(v >> 32);
out[5] = (uint8_t)(v >> 40);
out[6] = (uint8_t)(v >> 48);
out[7] = (uint8_t)(v >> 56);
}
#endif /* BROTLI_LITTLE_ENDIAN */
/* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x))
#else
#define BROTLI_IS_CONSTANT(x) (!!0)
#endif
#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
#define BROTLI_HAS_UBFX (!!1)
#else
#define BROTLI_HAS_UBFX (!!0)
#endif
#if defined(BROTLI_ENABLE_LOG)
#define BROTLI_LOG(x) printf x
#else
#define BROTLI_LOG(x)
#endif
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
#define BROTLI_DCHECK(x) assert(x)
static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
fflush(stderr);
}
#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
#else
#define BROTLI_DCHECK(x)
#define BROTLI_DUMP() (void)(0)
#endif
/* TODO(eustas): add appropriate icc/sunpro/arm/ibm/ti checks. */
#if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \
!defined(BROTLI_BUILD_NO_RBIT)
#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
/* TODO(eustas): detect ARMv6T2 and enable this code for it. */
static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) {
brotli_reg_t output;
__asm__("rbit %0, %1\n" : "=r"(output) : "r"(input));
return output;
}
#define BROTLI_RBIT(x) BrotliRBit(x)
#endif /* armv7 / armv8 */
#endif /* gcc || clang */
#if !defined(BROTLI_RBIT)
static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ }
#endif /* BROTLI_RBIT */
#define BROTLI_REPEAT(N, X) { \
if ((N & 1) != 0) {X;} \
if ((N & 2) != 0) {X; X;} \
if ((N & 4) != 0) {X; X; X; X;} \
}
#define BROTLI_UNUSED(X) (void)(X)
#define BROTLI_MIN_MAX(T) \
static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \
static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; }
BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int)
BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t)
#undef BROTLI_MIN_MAX
#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B)))
#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B)))
#define BROTLI_SWAP(T, A, I, J) { \
T __brotli_swap_tmp = (A)[(I)]; \
(A)[(I)] = (A)[(J)]; \
(A)[(J)] = __brotli_swap_tmp; \
}
#if BROTLI_64_BITS
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_TZCNT64 __builtin_ctzll
#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
#if defined(BROTLI_TARGET_X64)
#define BROTLI_TZCNT64 _tzcnt_u64
#else /* BROTLI_TARGET_X64 */
static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) {
uint32_t lsb;
_BitScanForward64(&lsb, x);
return lsb;
}
#define BROTLI_TZCNT64 BrotliBsf64Msvc
#endif /* BROTLI_TARGET_X64 */
#endif /* __builtin_ctzll */
#endif /* BROTLI_64_BITS */
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x))
#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) {
unsigned long msb;
_BitScanReverse(&msb, x);
return (uint32_t)msb;
}
#define BROTLI_BSR32 BrotliBsr32Msvc
#endif /* __builtin_clz */
/* Default brotli_alloc_func */
BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size);
/* Default brotli_free_func */
BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address);
BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) {
BROTLI_UNUSED(&BrotliSuppressUnusedFunctions);
BROTLI_UNUSED(&BrotliUnalignedRead16);
BROTLI_UNUSED(&BrotliUnalignedRead32);
BROTLI_UNUSED(&BrotliUnalignedRead64);
BROTLI_UNUSED(&BrotliUnalignedWrite64);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE);
BROTLI_UNUSED(&BrotliRBit);
BROTLI_UNUSED(&brotli_min_double);
BROTLI_UNUSED(&brotli_max_double);
BROTLI_UNUSED(&brotli_min_float);
BROTLI_UNUSED(&brotli_max_float);
BROTLI_UNUSED(&brotli_min_int);
BROTLI_UNUSED(&brotli_max_int);
BROTLI_UNUSED(&brotli_min_size_t);
BROTLI_UNUSED(&brotli_max_size_t);
BROTLI_UNUSED(&brotli_min_uint32_t);
BROTLI_UNUSED(&brotli_max_uint32_t);
BROTLI_UNUSED(&brotli_min_uint8_t);
BROTLI_UNUSED(&brotli_max_uint8_t);
BROTLI_UNUSED(&BrotliDefaultAllocFunc);
BROTLI_UNUSED(&BrotliDefaultFreeFunc);
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
BROTLI_UNUSED(&BrotliDump);
#endif
}
#endif /* BROTLI_COMMON_PLATFORM_H_ */

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@ -0,0 +1,515 @@
/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Shared Dictionary definition and utilities. */
#include <brotli/shared_dictionary.h>
#include <memory.h>
#include <stdlib.h> /* malloc, free */
#include <stdio.h>
#include "dictionary.h"
#include "platform.h"
#include "shared_dictionary_internal.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_NUM_ENCODED_LENGTHS (SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH \
- SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH + 1)
/* Max allowed by spec */
#define BROTLI_MAX_SIZE_BITS 15u
/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */
static BROTLI_BOOL ReadBool(const uint8_t* encoded, size_t size, size_t* pos,
BROTLI_BOOL* result) {
uint8_t value;
size_t position = *pos;
if (position >= size) return BROTLI_FALSE; /* past file end */
value = encoded[position++];
if (value > 1) return BROTLI_FALSE; /* invalid bool */
*result = TO_BROTLI_BOOL(value);
*pos = position;
return BROTLI_TRUE; /* success */
}
/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */
static BROTLI_BOOL ReadUint8(const uint8_t* encoded, size_t size, size_t* pos,
uint8_t* result) {
size_t position = *pos;
if (position + sizeof(uint8_t) > size) return BROTLI_FALSE;
*result = encoded[position++];
*pos = position;
return BROTLI_TRUE;
}
/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */
static BROTLI_BOOL ReadUint16(const uint8_t* encoded, size_t size, size_t* pos,
uint16_t* result) {
size_t position = *pos;
if (position + sizeof(uint16_t) > size) return BROTLI_FALSE;
*result = BROTLI_UNALIGNED_LOAD16LE(&encoded[position]);
position += 2;
*pos = position;
return BROTLI_TRUE;
}
/* Reads a varint into a uint32_t, and returns error if it's too large */
/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */
static BROTLI_BOOL ReadVarint32(const uint8_t* encoded, size_t size,
size_t* pos, uint32_t* result) {
int num = 0;
uint8_t byte;
*result = 0;
for (;;) {
if (*pos >= size) return BROTLI_FALSE;
byte = encoded[(*pos)++];
if (num == 4 && byte > 15) return BROTLI_FALSE;
*result |= (uint32_t)(byte & 127) << (num * 7);
if (byte < 128) return BROTLI_TRUE;
num++;
}
}
/* Returns the total length of word list. */
static size_t BrotliSizeBitsToOffsets(const uint8_t* size_bits_by_length,
uint32_t* offsets_by_length) {
uint32_t pos = 0;
uint32_t i;
for (i = 0; i <= SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH; i++) {
offsets_by_length[i] = pos;
if (size_bits_by_length[i] != 0) {
pos += i << size_bits_by_length[i];
}
}
return pos;
}
static BROTLI_BOOL ParseWordList(size_t size, const uint8_t* encoded,
size_t* pos, BrotliDictionary* out) {
size_t offset;
size_t i;
size_t position = *pos;
if (position + BROTLI_NUM_ENCODED_LENGTHS > size) {
return BROTLI_FALSE;
}
memset(out->size_bits_by_length, 0, SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH);
memcpy(out->size_bits_by_length + SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH,
&encoded[position], BROTLI_NUM_ENCODED_LENGTHS);
for (i = SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH;
i <= SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH; i++) {
if (out->size_bits_by_length[i] > BROTLI_MAX_SIZE_BITS) {
return BROTLI_FALSE;
}
}
position += BROTLI_NUM_ENCODED_LENGTHS;
offset = BrotliSizeBitsToOffsets(
out->size_bits_by_length, out->offsets_by_length);
out->data = &encoded[position];
out->data_size = offset;
position += offset;
if (position > size) return BROTLI_FALSE;
*pos = position;
return BROTLI_TRUE;
}
/* Computes the cutOffTransforms of a BrotliTransforms which already has the
transforms data correctly filled in. */
static void ComputeCutoffTransforms(BrotliTransforms* transforms) {
uint32_t i;
for (i = 0; i < BROTLI_TRANSFORMS_MAX_CUT_OFF + 1; i++) {
transforms->cutOffTransforms[i] = -1;
}
for (i = 0; i < transforms->num_transforms; i++) {
const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, i);
uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, i);
const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, i);
if (type <= BROTLI_TRANSFORM_OMIT_LAST_9 && *prefix == 0 && *suffix == 0 &&
transforms->cutOffTransforms[type] == -1) {
transforms->cutOffTransforms[type] = (int16_t)i;
}
}
}
static BROTLI_BOOL ParsePrefixSuffixTable(size_t size, const uint8_t* encoded,
size_t* pos, BrotliTransforms* out, uint16_t* out_table,
size_t* out_table_size) {
size_t position = *pos;
size_t offset = 0;
size_t stringlet_count = 0; /* NUM_PREFIX_SUFFIX */
size_t data_length = 0;
/* PREFIX_SUFFIX_LENGTH */
if (!ReadUint16(encoded, size, &position, &out->prefix_suffix_size)) {
return BROTLI_FALSE;
}
data_length = out->prefix_suffix_size;
/* Must at least have space for null terminator. */
if (data_length < 1) return BROTLI_FALSE;
out->prefix_suffix = &encoded[position];
if (position + data_length >= size) return BROTLI_FALSE;
while (BROTLI_TRUE) {
/* STRING_LENGTH */
size_t stringlet_len = encoded[position + offset];
out_table[stringlet_count] = (uint16_t)offset;
stringlet_count++;
offset++;
if (stringlet_len == 0) {
if (offset == data_length) {
break;
} else {
return BROTLI_FALSE;
}
}
if (stringlet_count > 255) return BROTLI_FALSE;
offset += stringlet_len;
if (offset >= data_length) return BROTLI_FALSE;
}
position += data_length;
*pos = position;
*out_table_size = (uint16_t)stringlet_count;
return BROTLI_TRUE;
}
static BROTLI_BOOL ParseTransformsList(size_t size, const uint8_t* encoded,
size_t* pos, BrotliTransforms* out, uint16_t* prefix_suffix_table,
size_t* prefix_suffix_count) {
uint32_t i;
BROTLI_BOOL has_params = BROTLI_FALSE;
BROTLI_BOOL prefix_suffix_ok = BROTLI_FALSE;
size_t position = *pos;
size_t stringlet_cnt = 0;
if (position >= size) return BROTLI_FALSE;
prefix_suffix_ok = ParsePrefixSuffixTable(
size, encoded, &position, out, prefix_suffix_table, &stringlet_cnt);
if (!prefix_suffix_ok) return BROTLI_FALSE;
out->prefix_suffix_map = prefix_suffix_table;
*prefix_suffix_count = stringlet_cnt;
out->num_transforms = encoded[position++];
out->transforms = &encoded[position];
position += (size_t)out->num_transforms * 3;
if (position > size) return BROTLI_FALSE;
/* Check for errors and read extra parameters. */
for (i = 0; i < out->num_transforms; i++) {
uint8_t prefix_id = BROTLI_TRANSFORM_PREFIX_ID(out, i);
uint8_t type = BROTLI_TRANSFORM_TYPE(out, i);
uint8_t suffix_id = BROTLI_TRANSFORM_SUFFIX_ID(out, i);
if (prefix_id >= stringlet_cnt) return BROTLI_FALSE;
if (type >= BROTLI_NUM_TRANSFORM_TYPES) return BROTLI_FALSE;
if (suffix_id >= stringlet_cnt) return BROTLI_FALSE;
if (type == BROTLI_TRANSFORM_SHIFT_FIRST ||
type == BROTLI_TRANSFORM_SHIFT_ALL) {
has_params = BROTLI_TRUE;
}
}
if (has_params) {
out->params = &encoded[position];
position += (size_t)out->num_transforms * 2;
if (position > size) return BROTLI_FALSE;
for (i = 0; i < out->num_transforms; i++) {
uint8_t type = BROTLI_TRANSFORM_TYPE(out, i);
if (type != BROTLI_TRANSFORM_SHIFT_FIRST &&
type != BROTLI_TRANSFORM_SHIFT_ALL) {
if (out->params[i * 2] != 0 || out->params[i * 2 + 1] != 0) {
return BROTLI_FALSE;
}
}
}
} else {
out->params = NULL;
}
ComputeCutoffTransforms(out);
*pos = position;
return BROTLI_TRUE;
}
static BROTLI_BOOL DryParseDictionary(const uint8_t* encoded,
size_t size, uint32_t* num_prefix, BROTLI_BOOL* is_custom_static_dict) {
size_t pos = 0;
uint32_t chunk_size = 0;
uint8_t num_word_lists;
uint8_t num_transform_lists;
*is_custom_static_dict = BROTLI_FALSE;
*num_prefix = 0;
/* Skip magic header bytes. */
pos += 2;
/* LZ77_DICTIONARY_LENGTH */
if (!ReadVarint32(encoded, size, &pos, &chunk_size)) return BROTLI_FALSE;
if (chunk_size != 0) {
/* This limitation is not specified but the 32-bit Brotli decoder for now */
if (chunk_size > 1073741823) return BROTLI_FALSE;
*num_prefix = 1;
if (pos + chunk_size > size) return BROTLI_FALSE;
pos += chunk_size;
}
if (!ReadUint8(encoded, size, &pos, &num_word_lists)) {
return BROTLI_FALSE;
}
if (!ReadUint8(encoded, size, &pos, &num_transform_lists)) {
return BROTLI_FALSE;
}
if (num_word_lists > 0 || num_transform_lists > 0) {
*is_custom_static_dict = BROTLI_TRUE;
}
return BROTLI_TRUE;
}
static BROTLI_BOOL ParseDictionary(const uint8_t* encoded, size_t size,
BrotliSharedDictionary* dict) {
uint32_t i;
size_t pos = 0;
uint32_t chunk_size = 0;
size_t total_prefix_suffix_count = 0;
size_t trasform_list_start[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
uint16_t temporary_prefix_suffix_table[256];
/* Skip magic header bytes. */
pos += 2;
/* LZ77_DICTIONARY_LENGTH */
if (!ReadVarint32(encoded, size, &pos, &chunk_size)) return BROTLI_FALSE;
if (chunk_size != 0) {
if (pos + chunk_size > size) return BROTLI_FALSE;
dict->prefix_size[dict->num_prefix] = chunk_size;
dict->prefix[dict->num_prefix] = &encoded[pos];
dict->num_prefix++;
/* LZ77_DICTIONARY_LENGTH bytes. */
pos += chunk_size;
}
/* NUM_WORD_LISTS */
if (!ReadUint8(encoded, size, &pos, &dict->num_word_lists)) {
return BROTLI_FALSE;
}
if (dict->num_word_lists > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) {
return BROTLI_FALSE;
}
if (dict->num_word_lists != 0) {
dict->words_instances = (BrotliDictionary*)dict->alloc_func(
dict->memory_manager_opaque,
dict->num_word_lists * sizeof(*dict->words_instances));
if (!dict->words_instances) return BROTLI_FALSE; /* OOM */
}
for (i = 0; i < dict->num_word_lists; i++) {
if (!ParseWordList(size, encoded, &pos, &dict->words_instances[i])) {
return BROTLI_FALSE;
}
}
/* NUM_TRANSFORM_LISTS */
if (!ReadUint8(encoded, size, &pos, &dict->num_transform_lists)) {
return BROTLI_FALSE;
}
if (dict->num_transform_lists > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) {
return BROTLI_FALSE;
}
if (dict->num_transform_lists != 0) {
dict->transforms_instances = (BrotliTransforms*)dict->alloc_func(
dict->memory_manager_opaque,
dict->num_transform_lists * sizeof(*dict->transforms_instances));
if (!dict->transforms_instances) return BROTLI_FALSE; /* OOM */
}
for (i = 0; i < dict->num_transform_lists; i++) {
BROTLI_BOOL ok = BROTLI_FALSE;
size_t prefix_suffix_count = 0;
trasform_list_start[i] = pos;
dict->transforms_instances[i].prefix_suffix_map =
temporary_prefix_suffix_table;
ok = ParseTransformsList(
size, encoded, &pos, &dict->transforms_instances[i],
temporary_prefix_suffix_table, &prefix_suffix_count);
if (!ok) return BROTLI_FALSE;
total_prefix_suffix_count += prefix_suffix_count;
}
if (total_prefix_suffix_count != 0) {
dict->prefix_suffix_maps = (uint16_t*)dict->alloc_func(
dict->memory_manager_opaque,
total_prefix_suffix_count * sizeof(*dict->prefix_suffix_maps));
if (!dict->prefix_suffix_maps) return BROTLI_FALSE; /* OOM */
}
total_prefix_suffix_count = 0;
for (i = 0; i < dict->num_transform_lists; i++) {
size_t prefix_suffix_count = 0;
size_t position = trasform_list_start[i];
uint16_t* prefix_suffix_map =
&dict->prefix_suffix_maps[total_prefix_suffix_count];
BROTLI_BOOL ok = ParsePrefixSuffixTable(
size, encoded, &position, &dict->transforms_instances[i],
prefix_suffix_map, &prefix_suffix_count);
if (!ok) return BROTLI_FALSE;
dict->transforms_instances[i].prefix_suffix_map = prefix_suffix_map;
total_prefix_suffix_count += prefix_suffix_count;
}
if (dict->num_word_lists != 0 || dict->num_transform_lists != 0) {
if (!ReadUint8(encoded, size, &pos, &dict->num_dictionaries)) {
return BROTLI_FALSE;
}
if (dict->num_dictionaries == 0 ||
dict->num_dictionaries > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) {
return BROTLI_FALSE;
}
for (i = 0; i < dict->num_dictionaries; i++) {
uint8_t words_index;
uint8_t transforms_index;
if (!ReadUint8(encoded, size, &pos, &words_index)) {
return BROTLI_FALSE;
}
if (words_index > dict->num_word_lists) return BROTLI_FALSE;
if (!ReadUint8(encoded, size, &pos, &transforms_index)) {
return BROTLI_FALSE;
}
if (transforms_index > dict->num_transform_lists) return BROTLI_FALSE;
dict->words[i] = words_index == dict->num_word_lists ?
BrotliGetDictionary() : &dict->words_instances[words_index];
dict->transforms[i] = transforms_index == dict->num_transform_lists ?
BrotliGetTransforms(): &dict->transforms_instances[transforms_index];
}
/* CONTEXT_ENABLED */
if (!ReadBool(encoded, size, &pos, &dict->context_based)) {
return BROTLI_FALSE;
}
/* CONTEXT_MAP */
if (dict->context_based) {
for (i = 0; i < SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS; i++) {
if (!ReadUint8(encoded, size, &pos, &dict->context_map[i])) {
return BROTLI_FALSE;
}
if (dict->context_map[i] >= dict->num_dictionaries) {
return BROTLI_FALSE;
}
}
}
} else {
dict->context_based = BROTLI_FALSE;
dict->num_dictionaries = 1;
dict->words[0] = BrotliGetDictionary();
dict->transforms[0] = BrotliGetTransforms();
}
return BROTLI_TRUE;
}
/* Decodes shared dictionary and verifies correctness.
Returns BROTLI_TRUE if dictionary is valid, BROTLI_FALSE otherwise.
The BrotliSharedDictionary must already have been initialized. If the
BrotliSharedDictionary already contains data, compound dictionaries
will be appended, but an error will be returned if it already has
custom words or transforms.
TODO(lode): link to RFC for shared brotli once published. */
static BROTLI_BOOL DecodeSharedDictionary(
const uint8_t* encoded, size_t size, BrotliSharedDictionary* dict) {
uint32_t num_prefix = 0;
BROTLI_BOOL is_custom_static_dict = BROTLI_FALSE;
BROTLI_BOOL has_custom_static_dict =
dict->num_word_lists > 0 || dict->num_transform_lists > 0;
/* Check magic header bytes. */
if (size < 2) return BROTLI_FALSE;
if (encoded[0] != 0x91 || encoded[1] != 0) return BROTLI_FALSE;
if (!DryParseDictionary(encoded, size, &num_prefix, &is_custom_static_dict)) {
return BROTLI_FALSE;
}
if (num_prefix + dict->num_prefix > SHARED_BROTLI_MAX_COMPOUND_DICTS) {
return BROTLI_FALSE;
}
/* Cannot combine different static dictionaries, only prefix dictionaries */
if (has_custom_static_dict && is_custom_static_dict) return BROTLI_FALSE;
return ParseDictionary(encoded, size, dict);
}
void BrotliSharedDictionaryDestroyInstance(
BrotliSharedDictionary* dict) {
if (!dict) {
return;
} else {
brotli_free_func free_func = dict->free_func;
void* opaque = dict->memory_manager_opaque;
/* Cleanup. */
free_func(opaque, dict->words_instances);
free_func(opaque, dict->transforms_instances);
free_func(opaque, dict->prefix_suffix_maps);
/* Self-destruction. */
free_func(opaque, dict);
}
}
BROTLI_BOOL BrotliSharedDictionaryAttach(
BrotliSharedDictionary* dict, BrotliSharedDictionaryType type,
size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]) {
if (!dict) {
return BROTLI_FALSE;
}
if (type == BROTLI_SHARED_DICTIONARY_SERIALIZED) {
return DecodeSharedDictionary(data, data_size, dict);
} else if (type == BROTLI_SHARED_DICTIONARY_RAW) {
if (dict->num_prefix >= SHARED_BROTLI_MAX_COMPOUND_DICTS) {
return BROTLI_FALSE;
}
dict->prefix_size[dict->num_prefix] = data_size;
dict->prefix[dict->num_prefix] = data;
dict->num_prefix++;
return BROTLI_TRUE;
} else {
return BROTLI_FALSE;
}
}
BrotliSharedDictionary* BrotliSharedDictionaryCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) {
BrotliSharedDictionary* dict = 0;
if (!alloc_func && !free_func) {
dict = (BrotliSharedDictionary*)malloc(sizeof(BrotliSharedDictionary));
} else if (alloc_func && free_func) {
dict = (BrotliSharedDictionary*)alloc_func(
opaque, sizeof(BrotliSharedDictionary));
}
if (dict == 0) {
return 0;
}
/* TODO(eustas): explicitly initialize all the fields? */
memset(dict, 0, sizeof(BrotliSharedDictionary));
dict->context_based = BROTLI_FALSE;
dict->num_dictionaries = 1;
dict->num_word_lists = 0;
dict->num_transform_lists = 0;
dict->words[0] = BrotliGetDictionary();
dict->transforms[0] = BrotliGetTransforms();
dict->alloc_func = alloc_func ? alloc_func : BrotliDefaultAllocFunc;
dict->free_func = free_func ? free_func : BrotliDefaultFreeFunc;
dict->memory_manager_opaque = opaque;
return dict;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* (Transparent) Shared Dictionary definition. */
#ifndef BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_
#define BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_
#include "dictionary.h"
#include <brotli/shared_dictionary.h>
#include "transform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
struct BrotliSharedDictionaryStruct {
/* LZ77 prefixes (compound dictionary). */
uint32_t num_prefix; /* max SHARED_BROTLI_MAX_COMPOUND_DICTS */
size_t prefix_size[SHARED_BROTLI_MAX_COMPOUND_DICTS];
const uint8_t* prefix[SHARED_BROTLI_MAX_COMPOUND_DICTS];
/* If set, the context map is used to select word and transform list from 64
contexts, if not set, the context map is not used and only words[0] and
transforms[0] are to be used. */
BROTLI_BOOL context_based;
uint8_t context_map[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
/* Amount of word_list+transform_list combinations. */
uint8_t num_dictionaries;
/* Must use num_dictionaries values. */
const BrotliDictionary* words[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
/* Must use num_dictionaries values. */
const BrotliTransforms* transforms[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
/* Amount of custom word lists. May be 0 if only Brotli's built-in is used */
uint8_t num_word_lists;
/* Contents of the custom words lists. Must be NULL if num_word_lists is 0. */
BrotliDictionary* words_instances;
/* Amount of custom transform lists. May be 0 if only Brotli's built-in is
used */
uint8_t num_transform_lists;
/* Contents of the custom transform lists. Must be NULL if num_transform_lists
is 0. */
BrotliTransforms* transforms_instances;
/* Concatenated prefix_suffix_maps of the custom transform lists. Must be NULL
if num_transform_lists is 0. */
uint16_t* prefix_suffix_maps;
/* Memory management */
brotli_alloc_func alloc_func;
brotli_free_func free_func;
void* memory_manager_opaque;
};
typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionaryInternal;
#define BrotliSharedDictionary BrotliSharedDictionaryInternal
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_ */

291
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/* 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 "transform.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* RFC 7932 transforms string data */
static const char kPrefixSuffix[217] =
"\1 \2, \10 of the \4 of \2s \1.\5 and \4 "
/* 0x _0 _2 __5 _E _3 _6 _8 _E */
"in \1\"\4 to \2\">\1\n\2. \1]\5 for \3 a \6 "
/* 2x _3_ _5 _A_ _D_ _F _2 _4 _A _E */
"that \1\'\6 with \6 from \4 by \1(\6. T"
/* 4x _5_ _7 _E _5 _A _C */
"he \4 on \4 as \4 is \4ing \2\n\t\1:\3ed "
/* 6x _3 _8 _D _2 _7_ _ _A _C */
"\2=\"\4 at \3ly \1,\2=\'\5.com/\7. This \5"
/* 8x _0 _ _3 _8 _C _E _ _1 _7 _F */
" not \3er \3al \4ful \4ive \5less \4es"
/* Ax _5 _9 _D _2 _7 _D */
"t \4ize \2\xc2\xa0\4ous \5 the \2e "; /* \0 - implicit trailing zero. */
/* Cx _2 _7___ ___ _A _F _5 _8 */
static const uint16_t kPrefixSuffixMap[50] = {
0x00, 0x02, 0x05, 0x0E, 0x13, 0x16, 0x18, 0x1E, 0x23, 0x25,
0x2A, 0x2D, 0x2F, 0x32, 0x34, 0x3A, 0x3E, 0x45, 0x47, 0x4E,
0x55, 0x5A, 0x5C, 0x63, 0x68, 0x6D, 0x72, 0x77, 0x7A, 0x7C,
0x80, 0x83, 0x88, 0x8C, 0x8E, 0x91, 0x97, 0x9F, 0xA5, 0xA9,
0xAD, 0xB2, 0xB7, 0xBD, 0xC2, 0xC7, 0xCA, 0xCF, 0xD5, 0xD8
};
/* RFC 7932 transforms */
static const uint8_t kTransformsData[] = {
49, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_IDENTITY, 0,
0, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_OMIT_FIRST_1, 49,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 47,
0, BROTLI_TRANSFORM_IDENTITY, 49,
4, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 6,
49, BROTLI_TRANSFORM_OMIT_FIRST_2, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 49,
1, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 1,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 7,
49, BROTLI_TRANSFORM_IDENTITY, 9,
48, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 8,
49, BROTLI_TRANSFORM_IDENTITY, 5,
49, BROTLI_TRANSFORM_IDENTITY, 10,
49, BROTLI_TRANSFORM_IDENTITY, 11,
49, BROTLI_TRANSFORM_OMIT_LAST_3, 49,
49, BROTLI_TRANSFORM_IDENTITY, 13,
49, BROTLI_TRANSFORM_IDENTITY, 14,
49, BROTLI_TRANSFORM_OMIT_FIRST_3, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_2, 49,
49, BROTLI_TRANSFORM_IDENTITY, 15,
49, BROTLI_TRANSFORM_IDENTITY, 16,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 12,
5, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 1,
49, BROTLI_TRANSFORM_OMIT_FIRST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 18,
49, BROTLI_TRANSFORM_IDENTITY, 17,
49, BROTLI_TRANSFORM_IDENTITY, 19,
49, BROTLI_TRANSFORM_IDENTITY, 20,
49, BROTLI_TRANSFORM_OMIT_FIRST_5, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_6, 49,
47, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 22,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 23,
49, BROTLI_TRANSFORM_IDENTITY, 24,
49, BROTLI_TRANSFORM_IDENTITY, 25,
49, BROTLI_TRANSFORM_OMIT_LAST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 26,
49, BROTLI_TRANSFORM_IDENTITY, 27,
49, BROTLI_TRANSFORM_IDENTITY, 28,
0, BROTLI_TRANSFORM_IDENTITY, 12,
49, BROTLI_TRANSFORM_IDENTITY, 29,
49, BROTLI_TRANSFORM_OMIT_FIRST_9, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_6, 49,
49, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_OMIT_LAST_8, 49,
49, BROTLI_TRANSFORM_IDENTITY, 31,
49, BROTLI_TRANSFORM_IDENTITY, 32,
47, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_OMIT_LAST_5, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_9, 49,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 8,
5, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 10,
49, BROTLI_TRANSFORM_IDENTITY, 30,
0, BROTLI_TRANSFORM_IDENTITY, 5,
35, BROTLI_TRANSFORM_IDENTITY, 49,
47, BROTLI_TRANSFORM_IDENTITY, 2,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 17,
49, BROTLI_TRANSFORM_IDENTITY, 36,
49, BROTLI_TRANSFORM_IDENTITY, 33,
5, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_IDENTITY, 37,
0, BROTLI_TRANSFORM_IDENTITY, 30,
49, BROTLI_TRANSFORM_IDENTITY, 38,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_IDENTITY, 39,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 8,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
0, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_IDENTITY, 40,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
49, BROTLI_TRANSFORM_IDENTITY, 41,
49, BROTLI_TRANSFORM_IDENTITY, 42,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 17,
49, BROTLI_TRANSFORM_IDENTITY, 43,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 10,
0, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
49, BROTLI_TRANSFORM_IDENTITY, 44,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
45, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 33,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
49, BROTLI_TRANSFORM_IDENTITY, 46,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 33,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
};
static const BrotliTransforms kBrotliTransforms = {
sizeof(kPrefixSuffix),
(const uint8_t*)kPrefixSuffix,
kPrefixSuffixMap,
sizeof(kTransformsData) / (3 * sizeof(kTransformsData[0])),
kTransformsData,
NULL, /* no extra parameters */
{0, 12, 27, 23, 42, 63, 56, 48, 59, 64}
};
const BrotliTransforms* BrotliGetTransforms(void) {
return &kBrotliTransforms;
}
static int ToUpperCase(uint8_t* p) {
if (p[0] < 0xC0) {
if (p[0] >= 'a' && p[0] <= 'z') {
p[0] ^= 32;
}
return 1;
}
/* An overly simplified uppercasing model for UTF-8. */
if (p[0] < 0xE0) {
p[1] ^= 32;
return 2;
}
/* An arbitrary transform for three byte characters. */
p[2] ^= 5;
return 3;
}
static int Shift(uint8_t* word, int word_len, uint16_t parameter) {
/* Limited sign extension: scalar < (1 << 24). */
uint32_t scalar =
(parameter & 0x7FFFu) + (0x1000000u - (parameter & 0x8000u));
if (word[0] < 0x80) {
/* 1-byte rune / 0sssssss / 7 bit scalar (ASCII). */
scalar += (uint32_t)word[0];
word[0] = (uint8_t)(scalar & 0x7Fu);
return 1;
} else if (word[0] < 0xC0) {
/* Continuation / 10AAAAAA. */
return 1;
} else if (word[0] < 0xE0) {
/* 2-byte rune / 110sssss AAssssss / 11 bit scalar. */
if (word_len < 2) return 1;
scalar += (uint32_t)((word[1] & 0x3Fu) | ((word[0] & 0x1Fu) << 6u));
word[0] = (uint8_t)(0xC0 | ((scalar >> 6u) & 0x1F));
word[1] = (uint8_t)((word[1] & 0xC0) | (scalar & 0x3F));
return 2;
} else if (word[0] < 0xF0) {
/* 3-byte rune / 1110ssss AAssssss BBssssss / 16 bit scalar. */
if (word_len < 3) return word_len;
scalar += (uint32_t)((word[2] & 0x3Fu) | ((word[1] & 0x3Fu) << 6u) |
((word[0] & 0x0Fu) << 12u));
word[0] = (uint8_t)(0xE0 | ((scalar >> 12u) & 0x0F));
word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 6u) & 0x3F));
word[2] = (uint8_t)((word[2] & 0xC0) | (scalar & 0x3F));
return 3;
} else if (word[0] < 0xF8) {
/* 4-byte rune / 11110sss AAssssss BBssssss CCssssss / 21 bit scalar. */
if (word_len < 4) return word_len;
scalar += (uint32_t)((word[3] & 0x3Fu) | ((word[2] & 0x3Fu) << 6u) |
((word[1] & 0x3Fu) << 12u) | ((word[0] & 0x07u) << 18u));
word[0] = (uint8_t)(0xF0 | ((scalar >> 18u) & 0x07));
word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 12u) & 0x3F));
word[2] = (uint8_t)((word[2] & 0xC0) | ((scalar >> 6u) & 0x3F));
word[3] = (uint8_t)((word[3] & 0xC0) | (scalar & 0x3F));
return 4;
}
return 1;
}
int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len,
const BrotliTransforms* transforms, int transform_idx) {
int idx = 0;
const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, transform_idx);
uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, transform_idx);
const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, transform_idx);
{
int prefix_len = *prefix++;
while (prefix_len--) { dst[idx++] = *prefix++; }
}
{
const int t = type;
int i = 0;
if (t <= BROTLI_TRANSFORM_OMIT_LAST_9) {
len -= t;
} else if (t >= BROTLI_TRANSFORM_OMIT_FIRST_1
&& t <= BROTLI_TRANSFORM_OMIT_FIRST_9) {
int skip = t - (BROTLI_TRANSFORM_OMIT_FIRST_1 - 1);
word += skip;
len -= skip;
}
while (i < len) { dst[idx++] = word[i++]; }
if (t == BROTLI_TRANSFORM_UPPERCASE_FIRST) {
ToUpperCase(&dst[idx - len]);
} else if (t == BROTLI_TRANSFORM_UPPERCASE_ALL) {
uint8_t* uppercase = &dst[idx - len];
while (len > 0) {
int step = ToUpperCase(uppercase);
uppercase += step;
len -= step;
}
} else if (t == BROTLI_TRANSFORM_SHIFT_FIRST) {
uint16_t param = (uint16_t)(transforms->params[transform_idx * 2]
+ (transforms->params[transform_idx * 2 + 1] << 8u));
Shift(&dst[idx - len], len, param);
} else if (t == BROTLI_TRANSFORM_SHIFT_ALL) {
uint16_t param = (uint16_t)(transforms->params[transform_idx * 2]
+ (transforms->params[transform_idx * 2 + 1] << 8u));
uint8_t* shift = &dst[idx - len];
while (len > 0) {
int step = Shift(shift, len, param);
shift += step;
len -= step;
}
}
}
{
int suffix_len = *suffix++;
while (suffix_len--) { dst[idx++] = *suffix++; }
return idx;
}
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* transforms is a part of ABI, but not API.
It means that there are some functions that are supposed to be in "common"
library, but header itself is not placed into include/brotli. This way,
aforementioned functions will be available only to brotli internals.
*/
#ifndef BROTLI_COMMON_TRANSFORM_H_
#define BROTLI_COMMON_TRANSFORM_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
enum BrotliWordTransformType {
BROTLI_TRANSFORM_IDENTITY = 0,
BROTLI_TRANSFORM_OMIT_LAST_1 = 1,
BROTLI_TRANSFORM_OMIT_LAST_2 = 2,
BROTLI_TRANSFORM_OMIT_LAST_3 = 3,
BROTLI_TRANSFORM_OMIT_LAST_4 = 4,
BROTLI_TRANSFORM_OMIT_LAST_5 = 5,
BROTLI_TRANSFORM_OMIT_LAST_6 = 6,
BROTLI_TRANSFORM_OMIT_LAST_7 = 7,
BROTLI_TRANSFORM_OMIT_LAST_8 = 8,
BROTLI_TRANSFORM_OMIT_LAST_9 = 9,
BROTLI_TRANSFORM_UPPERCASE_FIRST = 10,
BROTLI_TRANSFORM_UPPERCASE_ALL = 11,
BROTLI_TRANSFORM_OMIT_FIRST_1 = 12,
BROTLI_TRANSFORM_OMIT_FIRST_2 = 13,
BROTLI_TRANSFORM_OMIT_FIRST_3 = 14,
BROTLI_TRANSFORM_OMIT_FIRST_4 = 15,
BROTLI_TRANSFORM_OMIT_FIRST_5 = 16,
BROTLI_TRANSFORM_OMIT_FIRST_6 = 17,
BROTLI_TRANSFORM_OMIT_FIRST_7 = 18,
BROTLI_TRANSFORM_OMIT_FIRST_8 = 19,
BROTLI_TRANSFORM_OMIT_FIRST_9 = 20,
BROTLI_TRANSFORM_SHIFT_FIRST = 21,
BROTLI_TRANSFORM_SHIFT_ALL = 22,
BROTLI_NUM_TRANSFORM_TYPES /* Counts transforms, not a transform itself. */
};
#define BROTLI_TRANSFORMS_MAX_CUT_OFF BROTLI_TRANSFORM_OMIT_LAST_9
typedef struct BrotliTransforms {
uint16_t prefix_suffix_size;
/* Last character must be null, so prefix_suffix_size must be at least 1. */
const uint8_t* prefix_suffix;
const uint16_t* prefix_suffix_map;
uint32_t num_transforms;
/* Each entry is a [prefix_id, transform, suffix_id] triplet. */
const uint8_t* transforms;
/* Shift for BROTLI_TRANSFORM_SHIFT_FIRST and BROTLI_TRANSFORM_SHIFT_ALL,
must be NULL if and only if no such transforms are present. */
const uint8_t* params;
/* Indices of transforms like ["", BROTLI_TRANSFORM_OMIT_LAST_#, ""].
0-th element corresponds to ["", BROTLI_TRANSFORM_IDENTITY, ""].
-1, if cut-off transform does not exist. */
int16_t cutOffTransforms[BROTLI_TRANSFORMS_MAX_CUT_OFF + 1];
} BrotliTransforms;
/* T is BrotliTransforms*; result is uint8_t. */
#define BROTLI_TRANSFORM_PREFIX_ID(T, I) ((T)->transforms[((I) * 3) + 0])
#define BROTLI_TRANSFORM_TYPE(T, I) ((T)->transforms[((I) * 3) + 1])
#define BROTLI_TRANSFORM_SUFFIX_ID(T, I) ((T)->transforms[((I) * 3) + 2])
/* T is BrotliTransforms*; result is const uint8_t*. */
#define BROTLI_TRANSFORM_PREFIX(T, I) (&(T)->prefix_suffix[ \
(T)->prefix_suffix_map[BROTLI_TRANSFORM_PREFIX_ID(T, I)]])
#define BROTLI_TRANSFORM_SUFFIX(T, I) (&(T)->prefix_suffix[ \
(T)->prefix_suffix_map[BROTLI_TRANSFORM_SUFFIX_ID(T, I)]])
BROTLI_COMMON_API const BrotliTransforms* BrotliGetTransforms(void);
BROTLI_COMMON_API int BrotliTransformDictionaryWord(
uint8_t* dst, const uint8_t* word, int len,
const BrotliTransforms* transforms, int transform_idx);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_COMMON_TRANSFORM_H_ */

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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Version definition. */
#ifndef BROTLI_COMMON_VERSION_H_
#define BROTLI_COMMON_VERSION_H_
/* This macro should only be used when library is compiled together with client.
If library is dynamically linked, use BrotliDecoderVersion and
BrotliEncoderVersion methods. */
/* Semantic version, calculated as (MAJOR << 24) | (MINOR << 12) | PATCH */
#define BROTLI_VERSION 0x1000009
/* This macro is used by build system to produce Libtool-friendly soname. See
https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
*/
/* ABI version, calculated as (CURRENT << 24) | (REVISION << 12) | AGE */
#define BROTLI_ABI_VERSION 0x1009000
#endif /* BROTLI_COMMON_VERSION_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Bit reading helpers */
#include "bit_reader.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
const uint32_t kBrotliBitMask[33] = { 0x00000000,
0x00000001, 0x00000003, 0x00000007, 0x0000000F,
0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF,
0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF,
0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF,
0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF
};
void BrotliInitBitReader(BrotliBitReader* const br) {
br->val_ = 0;
br->bit_pos_ = sizeof(br->val_) << 3;
}
BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
size_t aligned_read_mask = (sizeof(br->val_) >> 1) - 1;
/* Fixing alignment after unaligned BrotliFillWindow would result accumulator
overflow. If unalignment is caused by BrotliSafeReadBits, then there is
enough space in accumulator to fix alignment. */
if (!BROTLI_ALIGNED_READ) {
aligned_read_mask = 0;
}
if (BrotliGetAvailableBits(br) == 0) {
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
}
while ((((size_t)br->next_in) & aligned_read_mask) != 0) {
if (!BrotliPullByte(br)) {
/* If we consumed all the input, we don't care about the alignment. */
return BROTLI_TRUE;
}
}
return BROTLI_TRUE;
}
BROTLI_BOOL BrotliSafeReadBits32Slow(BrotliBitReader* const br,
uint32_t n_bits, uint32_t* val) {
uint32_t low_val;
uint32_t high_val;
BrotliBitReaderState memento;
BROTLI_DCHECK(n_bits <= 32);
BROTLI_DCHECK(n_bits > 24);
BrotliBitReaderSaveState(br, &memento);
if (!BrotliSafeReadBits(br, 16, &low_val) ||
!BrotliSafeReadBits(br, n_bits - 16, &high_val)) {
BrotliBitReaderRestoreState(br, &memento);
return BROTLI_FALSE;
}
*val = low_val | (high_val << 16);
return BROTLI_TRUE;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Bit reading helpers */
#ifndef BROTLI_DEC_BIT_READER_H_
#define BROTLI_DEC_BIT_READER_H_
#include <string.h> /* memcpy */
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1)
BROTLI_INTERNAL extern const uint32_t kBrotliBitMask[33];
static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
/* Masking with this expression turns to a single
"Unsigned Bit Field Extract" UBFX instruction on ARM. */
return ~((0xFFFFFFFFu) << n);
} else {
return kBrotliBitMask[n];
}
}
typedef struct {
brotli_reg_t val_; /* pre-fetched bits */
uint32_t bit_pos_; /* current bit-reading position in val_ */
const uint8_t* next_in; /* the byte we're reading from */
size_t avail_in;
} BrotliBitReader;
typedef struct {
brotli_reg_t val_;
uint32_t bit_pos_;
const uint8_t* next_in;
size_t avail_in;
} BrotliBitReaderState;
/* Initializes the BrotliBitReader fields. */
BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* const br);
/* Ensures that accumulator is not empty.
May consume up to sizeof(brotli_reg_t) - 1 bytes of input.
Returns BROTLI_FALSE if data is required but there is no input available.
For BROTLI_ALIGNED_READ this function also prepares bit reader for aligned
reading. */
BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br);
/* Fallback for BrotliSafeReadBits32. Extracted as noninlined method to unburden
the main code-path. Never called for RFC brotli streams, required only for
"large-window" mode and other extensions. */
BROTLI_INTERNAL BROTLI_NOINLINE BROTLI_BOOL BrotliSafeReadBits32Slow(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val);
static BROTLI_INLINE void BrotliBitReaderSaveState(
BrotliBitReader* const from, BrotliBitReaderState* to) {
to->val_ = from->val_;
to->bit_pos_ = from->bit_pos_;
to->next_in = from->next_in;
to->avail_in = from->avail_in;
}
static BROTLI_INLINE void BrotliBitReaderRestoreState(
BrotliBitReader* const to, BrotliBitReaderState* from) {
to->val_ = from->val_;
to->bit_pos_ = from->bit_pos_;
to->next_in = from->next_in;
to->avail_in = from->avail_in;
}
static BROTLI_INLINE uint32_t BrotliGetAvailableBits(
const BrotliBitReader* br) {
return (BROTLI_64_BITS ? 64 : 32) - br->bit_pos_;
}
/* Returns amount of unread bytes the bit reader still has buffered from the
BrotliInput, including whole bytes in br->val_. Result is capped with
maximal ring-buffer size (larger number won't be utilized anyway). */
static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) {
static const size_t kCap = (size_t)1 << BROTLI_LARGE_MAX_WBITS;
if (br->avail_in > kCap) return kCap;
return br->avail_in + (BrotliGetAvailableBits(br) >> 3);
}
/* Checks if there is at least |num| bytes left in the input ring-buffer
(excluding the bits remaining in br->val_). */
static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount(
BrotliBitReader* const br, size_t num) {
return TO_BROTLI_BOOL(br->avail_in >= num);
}
/* Guarantees that there are at least |n_bits| + 1 bits in accumulator.
Precondition: accumulator contains at least 1 bit.
|n_bits| should be in the range [1..24] for regular build. For portable
non-64-bit little-endian build only 16 bits are safe to request. */
static BROTLI_INLINE void BrotliFillBitWindow(
BrotliBitReader* const br, uint32_t n_bits) {
#if (BROTLI_64_BITS)
if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 56) {
br->val_ =
(br->val_ >> 56) | (BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 8);
br->bit_pos_ =
bit_pos ^ 56; /* here same as -= 56 because of the if condition */
br->avail_in -= 7;
br->next_in += 7;
}
} else if (
!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 16)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 48) {
br->val_ =
(br->val_ >> 48) | (BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 16);
br->bit_pos_ =
bit_pos ^ 48; /* here same as -= 48 because of the if condition */
br->avail_in -= 6;
br->next_in += 6;
}
} else {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 32) {
br->val_ = (br->val_ >> 32) |
(((uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in)) << 32);
br->bit_pos_ =
bit_pos ^ 32; /* here same as -= 32 because of the if condition */
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
}
#else
if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 24) {
br->val_ =
(br->val_ >> 24) | (BROTLI_UNALIGNED_LOAD32LE(br->next_in) << 8);
br->bit_pos_ =
bit_pos ^ 24; /* here same as -= 24 because of the if condition */
br->avail_in -= 3;
br->next_in += 3;
}
} else {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 16) {
br->val_ = (br->val_ >> 16) |
(((uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in)) << 16);
br->bit_pos_ =
bit_pos ^ 16; /* here same as -= 16 because of the if condition */
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
}
#endif
}
/* Mostly like BrotliFillBitWindow, but guarantees only 16 bits and reads no
more than BROTLI_SHORT_FILL_BIT_WINDOW_READ bytes of input. */
static BROTLI_INLINE void BrotliFillBitWindow16(BrotliBitReader* const br) {
BrotliFillBitWindow(br, 17);
}
/* Tries to pull one byte of input to accumulator.
Returns BROTLI_FALSE if there is no input available. */
static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
if (br->avail_in == 0) {
return BROTLI_FALSE;
}
br->val_ >>= 8;
#if (BROTLI_64_BITS)
br->val_ |= ((uint64_t)*br->next_in) << 56;
#else
br->val_ |= ((uint32_t)*br->next_in) << 24;
#endif
br->bit_pos_ -= 8;
--br->avail_in;
++br->next_in;
return BROTLI_TRUE;
}
/* Returns currently available bits.
The number of valid bits could be calculated by BrotliGetAvailableBits. */
static BROTLI_INLINE brotli_reg_t BrotliGetBitsUnmasked(
BrotliBitReader* const br) {
return br->val_ >> br->bit_pos_;
}
/* Like BrotliGetBits, but does not mask the result.
The result contains at least 16 valid bits. */
static BROTLI_INLINE uint32_t BrotliGet16BitsUnmasked(
BrotliBitReader* const br) {
BrotliFillBitWindow(br, 16);
return (uint32_t)BrotliGetBitsUnmasked(br);
}
/* Returns the specified number of bits from |br| without advancing bit
position. */
static BROTLI_INLINE uint32_t BrotliGetBits(
BrotliBitReader* const br, uint32_t n_bits) {
BrotliFillBitWindow(br, n_bits);
return (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
}
/* Tries to peek the specified amount of bits. Returns BROTLI_FALSE, if there
is not enough input. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
while (BrotliGetAvailableBits(br) < n_bits) {
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
}
*val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
return BROTLI_TRUE;
}
/* Advances the bit pos by |n_bits|. */
static BROTLI_INLINE void BrotliDropBits(
BrotliBitReader* const br, uint32_t n_bits) {
br->bit_pos_ += n_bits;
}
static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) {
uint32_t unused_bytes = BrotliGetAvailableBits(br) >> 3;
uint32_t unused_bits = unused_bytes << 3;
br->avail_in += unused_bytes;
br->next_in -= unused_bytes;
if (unused_bits == sizeof(br->val_) << 3) {
br->val_ = 0;
} else {
br->val_ <<= unused_bits;
}
br->bit_pos_ += unused_bits;
}
/* Reads the specified number of bits from |br| and advances the bit pos.
Precondition: accumulator MUST contain at least |n_bits|. */
static BROTLI_INLINE void BrotliTakeBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
*val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
BROTLI_LOG(("[BrotliTakeBits] %d %d %d val: %6x\n",
(int)br->avail_in, (int)br->bit_pos_, (int)n_bits, (int)*val));
BrotliDropBits(br, n_bits);
}
/* Reads the specified number of bits from |br| and advances the bit pos.
Assumes that there is enough input to perform BrotliFillBitWindow.
Up to 24 bits are allowed to be requested from this method. */
static BROTLI_INLINE uint32_t BrotliReadBits24(
BrotliBitReader* const br, uint32_t n_bits) {
BROTLI_DCHECK(n_bits <= 24);
if (BROTLI_64_BITS || (n_bits <= 16)) {
uint32_t val;
BrotliFillBitWindow(br, n_bits);
BrotliTakeBits(br, n_bits, &val);
return val;
} else {
uint32_t low_val;
uint32_t high_val;
BrotliFillBitWindow(br, 16);
BrotliTakeBits(br, 16, &low_val);
BrotliFillBitWindow(br, 8);
BrotliTakeBits(br, n_bits - 16, &high_val);
return low_val | (high_val << 16);
}
}
/* Same as BrotliReadBits24, but allows reading up to 32 bits. */
static BROTLI_INLINE uint32_t BrotliReadBits32(
BrotliBitReader* const br, uint32_t n_bits) {
BROTLI_DCHECK(n_bits <= 32);
if (BROTLI_64_BITS || (n_bits <= 16)) {
uint32_t val;
BrotliFillBitWindow(br, n_bits);
BrotliTakeBits(br, n_bits, &val);
return val;
} else {
uint32_t low_val;
uint32_t high_val;
BrotliFillBitWindow(br, 16);
BrotliTakeBits(br, 16, &low_val);
BrotliFillBitWindow(br, 16);
BrotliTakeBits(br, n_bits - 16, &high_val);
return low_val | (high_val << 16);
}
}
/* Tries to read the specified amount of bits. Returns BROTLI_FALSE, if there
is not enough input. |n_bits| MUST be positive.
Up to 24 bits are allowed to be requested from this method. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BROTLI_DCHECK(n_bits <= 24);
while (BrotliGetAvailableBits(br) < n_bits) {
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
}
BrotliTakeBits(br, n_bits, val);
return BROTLI_TRUE;
}
/* Same as BrotliSafeReadBits, but allows reading up to 32 bits. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits32(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BROTLI_DCHECK(n_bits <= 32);
if (BROTLI_64_BITS || (n_bits <= 24)) {
while (BrotliGetAvailableBits(br) < n_bits) {
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
}
BrotliTakeBits(br, n_bits, val);
return BROTLI_TRUE;
} else {
return BrotliSafeReadBits32Slow(br, n_bits, val);
}
}
/* Advances the bit reader position to the next byte boundary and verifies
that any skipped bits are set to zero. */
static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) {
uint32_t pad_bits_count = BrotliGetAvailableBits(br) & 0x7;
uint32_t pad_bits = 0;
if (pad_bits_count != 0) {
BrotliTakeBits(br, pad_bits_count, &pad_bits);
}
return TO_BROTLI_BOOL(pad_bits == 0);
}
/* Copies remaining input bytes stored in the bit reader to the output. Value
|num| may not be larger than BrotliGetRemainingBytes. The bit reader must be
warmed up again after this. */
static BROTLI_INLINE void BrotliCopyBytes(uint8_t* dest,
BrotliBitReader* br, size_t num) {
while (BrotliGetAvailableBits(br) >= 8 && num > 0) {
*dest = (uint8_t)BrotliGetBitsUnmasked(br);
BrotliDropBits(br, 8);
++dest;
--num;
}
memcpy(dest, br->next_in, num);
br->avail_in -= num;
br->next_in += num;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_BIT_READER_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Utilities for building Huffman decoding tables. */
#include "huffman.h"
#include <string.h> /* memcpy, memset */
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_REVERSE_BITS_MAX 8
#if defined(BROTLI_RBIT)
#define BROTLI_REVERSE_BITS_BASE \
((sizeof(brotli_reg_t) << 3) - BROTLI_REVERSE_BITS_MAX)
#else
#define BROTLI_REVERSE_BITS_BASE 0
static uint8_t kReverseBits[1 << BROTLI_REVERSE_BITS_MAX] = {
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
#endif /* BROTLI_RBIT */
#define BROTLI_REVERSE_BITS_LOWEST \
((brotli_reg_t)1 << (BROTLI_REVERSE_BITS_MAX - 1 + BROTLI_REVERSE_BITS_BASE))
/* Returns reverse(num >> BROTLI_REVERSE_BITS_BASE, BROTLI_REVERSE_BITS_MAX),
where reverse(value, len) is the bit-wise reversal of the len least
significant bits of value. */
static BROTLI_INLINE brotli_reg_t BrotliReverseBits(brotli_reg_t num) {
#if defined(BROTLI_RBIT)
return BROTLI_RBIT(num);
#else
return kReverseBits[num];
#endif
}
/* Stores code in table[0], table[step], table[2*step], ..., table[end] */
/* Assumes that end is an integer multiple of step */
static BROTLI_INLINE void ReplicateValue(HuffmanCode* table,
int step, int end,
HuffmanCode code) {
do {
end -= step;
table[end] = code;
} while (end > 0);
}
/* Returns the table width of the next 2nd level table. |count| is the histogram
of bit lengths for the remaining symbols, |len| is the code length of the
next processed symbol. */
static BROTLI_INLINE int NextTableBitSize(const uint16_t* const count,
int len, int root_bits) {
int left = 1 << (len - root_bits);
while (len < BROTLI_HUFFMAN_MAX_CODE_LENGTH) {
left -= count[len];
if (left <= 0) break;
++len;
left <<= 1;
}
return len - root_bits;
}
void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table,
const uint8_t* const code_lengths,
uint16_t* count) {
HuffmanCode code; /* current table entry */
int symbol; /* symbol index in original or sorted table */
brotli_reg_t key; /* prefix code */
brotli_reg_t key_step; /* prefix code addend */
int step; /* step size to replicate values in current table */
int table_size; /* size of current table */
int sorted[BROTLI_CODE_LENGTH_CODES]; /* symbols sorted by code length */
/* offsets in sorted table for each length */
int offset[BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH + 1];
int bits;
int bits_count;
BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH <=
BROTLI_REVERSE_BITS_MAX);
/* Generate offsets into sorted symbol table by code length. */
symbol = -1;
bits = 1;
BROTLI_REPEAT(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH, {
symbol += count[bits];
offset[bits] = symbol;
bits++;
});
/* Symbols with code length 0 are placed after all other symbols. */
offset[0] = BROTLI_CODE_LENGTH_CODES - 1;
/* Sort symbols by length, by symbol order within each length. */
symbol = BROTLI_CODE_LENGTH_CODES;
do {
BROTLI_REPEAT(6, {
symbol--;
sorted[offset[code_lengths[symbol]]--] = symbol;
});
} while (symbol != 0);
table_size = 1 << BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH;
/* Special case: all symbols but one have 0 code length. */
if (offset[0] == 0) {
code = ConstructHuffmanCode(0, (uint16_t)sorted[0]);
for (key = 0; key < (brotli_reg_t)table_size; ++key) {
table[key] = code;
}
return;
}
/* Fill in table. */
key = 0;
key_step = BROTLI_REVERSE_BITS_LOWEST;
symbol = 0;
bits = 1;
step = 2;
do {
for (bits_count = count[bits]; bits_count != 0; --bits_count) {
code = ConstructHuffmanCode((uint8_t)bits, (uint16_t)sorted[symbol++]);
ReplicateValue(&table[BrotliReverseBits(key)], step, table_size, code);
key += key_step;
}
step <<= 1;
key_step >>= 1;
} while (++bits <= BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH);
}
uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
int root_bits,
const uint16_t* const symbol_lists,
uint16_t* count) {
HuffmanCode code; /* current table entry */
HuffmanCode* table; /* next available space in table */
int len; /* current code length */
int symbol; /* symbol index in original or sorted table */
brotli_reg_t key; /* prefix code */
brotli_reg_t key_step; /* prefix code addend */
brotli_reg_t sub_key; /* 2nd level table prefix code */
brotli_reg_t sub_key_step; /* 2nd level table prefix code addend */
int step; /* step size to replicate values in current table */
int table_bits; /* key length of current table */
int table_size; /* size of current table */
int total_size; /* sum of root table size and 2nd level table sizes */
int max_length = -1;
int bits;
int bits_count;
BROTLI_DCHECK(root_bits <= BROTLI_REVERSE_BITS_MAX);
BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH - root_bits <=
BROTLI_REVERSE_BITS_MAX);
while (symbol_lists[max_length] == 0xFFFF) max_length--;
max_length += BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1;
table = root_table;
table_bits = root_bits;
table_size = 1 << table_bits;
total_size = table_size;
/* Fill in the root table. Reduce the table size to if possible,
and create the repetitions by memcpy. */
if (table_bits > max_length) {
table_bits = max_length;
table_size = 1 << table_bits;
}
key = 0;
key_step = BROTLI_REVERSE_BITS_LOWEST;
bits = 1;
step = 2;
do {
symbol = bits - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1);
for (bits_count = count[bits]; bits_count != 0; --bits_count) {
symbol = symbol_lists[symbol];
code = ConstructHuffmanCode((uint8_t)bits, (uint16_t)symbol);
ReplicateValue(&table[BrotliReverseBits(key)], step, table_size, code);
key += key_step;
}
step <<= 1;
key_step >>= 1;
} while (++bits <= table_bits);
/* If root_bits != table_bits then replicate to fill the remaining slots. */
while (total_size != table_size) {
memcpy(&table[table_size], &table[0],
(size_t)table_size * sizeof(table[0]));
table_size <<= 1;
}
/* Fill in 2nd level tables and add pointers to root table. */
key_step = BROTLI_REVERSE_BITS_LOWEST >> (root_bits - 1);
sub_key = (BROTLI_REVERSE_BITS_LOWEST << 1);
sub_key_step = BROTLI_REVERSE_BITS_LOWEST;
for (len = root_bits + 1, step = 2; len <= max_length; ++len) {
symbol = len - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1);
for (; count[len] != 0; --count[len]) {
if (sub_key == (BROTLI_REVERSE_BITS_LOWEST << 1U)) {
table += table_size;
table_bits = NextTableBitSize(count, len, root_bits);
table_size = 1 << table_bits;
total_size += table_size;
sub_key = BrotliReverseBits(key);
key += key_step;
root_table[sub_key] = ConstructHuffmanCode(
(uint8_t)(table_bits + root_bits),
(uint16_t)(((size_t)(table - root_table)) - sub_key));
sub_key = 0;
}
symbol = symbol_lists[symbol];
code = ConstructHuffmanCode((uint8_t)(len - root_bits), (uint16_t)symbol);
ReplicateValue(
&table[BrotliReverseBits(sub_key)], step, table_size, code);
sub_key += sub_key_step;
}
step <<= 1;
sub_key_step >>= 1;
}
return (uint32_t)total_size;
}
uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table,
int root_bits,
uint16_t* val,
uint32_t num_symbols) {
uint32_t table_size = 1;
const uint32_t goal_size = 1U << root_bits;
switch (num_symbols) {
case 0:
table[0] = ConstructHuffmanCode(0, val[0]);
break;
case 1:
if (val[1] > val[0]) {
table[0] = ConstructHuffmanCode(1, val[0]);
table[1] = ConstructHuffmanCode(1, val[1]);
} else {
table[0] = ConstructHuffmanCode(1, val[1]);
table[1] = ConstructHuffmanCode(1, val[0]);
}
table_size = 2;
break;
case 2:
table[0] = ConstructHuffmanCode(1, val[0]);
table[2] = ConstructHuffmanCode(1, val[0]);
if (val[2] > val[1]) {
table[1] = ConstructHuffmanCode(2, val[1]);
table[3] = ConstructHuffmanCode(2, val[2]);
} else {
table[1] = ConstructHuffmanCode(2, val[2]);
table[3] = ConstructHuffmanCode(2, val[1]);
}
table_size = 4;
break;
case 3: {
int i, k;
for (i = 0; i < 3; ++i) {
for (k = i + 1; k < 4; ++k) {
if (val[k] < val[i]) {
uint16_t t = val[k];
val[k] = val[i];
val[i] = t;
}
}
}
table[0] = ConstructHuffmanCode(2, val[0]);
table[2] = ConstructHuffmanCode(2, val[1]);
table[1] = ConstructHuffmanCode(2, val[2]);
table[3] = ConstructHuffmanCode(2, val[3]);
table_size = 4;
break;
}
case 4: {
if (val[3] < val[2]) {
uint16_t t = val[3];
val[3] = val[2];
val[2] = t;
}
table[0] = ConstructHuffmanCode(1, val[0]);
table[1] = ConstructHuffmanCode(2, val[1]);
table[2] = ConstructHuffmanCode(1, val[0]);
table[3] = ConstructHuffmanCode(3, val[2]);
table[4] = ConstructHuffmanCode(1, val[0]);
table[5] = ConstructHuffmanCode(2, val[1]);
table[6] = ConstructHuffmanCode(1, val[0]);
table[7] = ConstructHuffmanCode(3, val[3]);
table_size = 8;
break;
}
}
while (table_size != goal_size) {
memcpy(&table[table_size], &table[0],
(size_t)table_size * sizeof(table[0]));
table_size <<= 1;
}
return goal_size;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Utilities for building Huffman decoding tables. */
#ifndef BROTLI_DEC_HUFFMAN_H_
#define BROTLI_DEC_HUFFMAN_H_
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_HUFFMAN_MAX_CODE_LENGTH 15
/* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */
#define BROTLI_HUFFMAN_MAX_SIZE_26 396
/* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */
#define BROTLI_HUFFMAN_MAX_SIZE_258 632
/* BROTLI_MAX_CONTEXT_MAP_SYMBOLS == 272 */
#define BROTLI_HUFFMAN_MAX_SIZE_272 646
#define BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH 5
#if ((defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_32)) && \
BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0))
#define BROTLI_HUFFMAN_CODE_FAST_LOAD
#endif
#if !defined(BROTLI_HUFFMAN_CODE_FAST_LOAD)
/* Do not create this struct directly - use the ConstructHuffmanCode
* constructor below! */
typedef struct {
uint8_t bits; /* number of bits used for this symbol */
uint16_t value; /* symbol value or table offset */
} HuffmanCode;
static BROTLI_INLINE HuffmanCode ConstructHuffmanCode(const uint8_t bits,
const uint16_t value) {
HuffmanCode h;
h.bits = bits;
h.value = value;
return h;
}
/* Please use the following macros to optimize HuffmanCode accesses in hot
* paths.
*
* For example, assuming |table| contains a HuffmanCode pointer:
*
* BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table);
* BROTLI_HC_ADJUST_TABLE_INDEX(table, index_into_table);
* *bits = BROTLI_HC_GET_BITS(table);
* *value = BROTLI_HC_GET_VALUE(table);
* BROTLI_HC_ADJUST_TABLE_INDEX(table, offset);
* *bits2 = BROTLI_HC_GET_BITS(table);
* *value2 = BROTLI_HC_GET_VALUE(table);
*
*/
#define BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(H)
#define BROTLI_HC_ADJUST_TABLE_INDEX(H, V) H += (V)
/* These must be given a HuffmanCode pointer! */
#define BROTLI_HC_FAST_LOAD_BITS(H) (H->bits)
#define BROTLI_HC_FAST_LOAD_VALUE(H) (H->value)
#else /* BROTLI_HUFFMAN_CODE_FAST_LOAD */
typedef BROTLI_ALIGNED(4) uint32_t HuffmanCode;
static BROTLI_INLINE HuffmanCode ConstructHuffmanCode(const uint8_t bits,
const uint16_t value) {
return (HuffmanCode) ((value & 0xFFFF) << 16) | (bits & 0xFF);
}
#define BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(H) uint32_t __fastload_##H = (*H)
#define BROTLI_HC_ADJUST_TABLE_INDEX(H, V) H += (V); __fastload_##H = (*H)
/* These must be given a HuffmanCode pointer! */
#define BROTLI_HC_FAST_LOAD_BITS(H) ((__fastload_##H) & 0xFF)
#define BROTLI_HC_FAST_LOAD_VALUE(H) ((__fastload_##H) >> 16)
#endif /* BROTLI_HUFFMAN_CODE_FAST_LOAD */
/* Builds Huffman lookup table assuming code lengths are in symbol order. */
BROTLI_INTERNAL void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* root_table,
const uint8_t* const code_lengths, uint16_t* count);
/* Builds Huffman lookup table assuming code lengths are in symbol order.
Returns size of resulting table. */
BROTLI_INTERNAL uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
int root_bits, const uint16_t* const symbol_lists, uint16_t* count);
/* Builds a simple Huffman table. The |num_symbols| parameter is to be
interpreted as follows: 0 means 1 symbol, 1 means 2 symbols,
2 means 3 symbols, 3 means 4 symbols with lengths [2, 2, 2, 2],
4 means 4 symbols with lengths [1, 2, 3, 3]. */
BROTLI_INTERNAL uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table,
int root_bits, uint16_t* symbols, uint32_t num_symbols);
/* Contains a collection of Huffman trees with the same alphabet size. */
/* alphabet_size_limit is needed due to simple codes, since
log2(alphabet_size_max) could be greater than log2(alphabet_size_limit). */
typedef struct {
HuffmanCode** htrees;
HuffmanCode* codes;
uint16_t alphabet_size_max;
uint16_t alphabet_size_limit;
uint16_t num_htrees;
} HuffmanTreeGroup;
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_HUFFMAN_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Lookup tables to map prefix codes to value ranges. This is used during
decoding of the block lengths, literal insertion lengths and copy lengths. */
#ifndef BROTLI_DEC_PREFIX_H_
#define BROTLI_DEC_PREFIX_H_
#include "../common/constants.h"
#include <brotli/types.h>
typedef struct CmdLutElement {
uint8_t insert_len_extra_bits;
uint8_t copy_len_extra_bits;
int8_t distance_code;
uint8_t context;
uint16_t insert_len_offset;
uint16_t copy_len_offset;
} CmdLutElement;
static const CmdLutElement kCmdLut[BROTLI_NUM_COMMAND_SYMBOLS] = {
{ 0x00, 0x00, 0, 0x00, 0x0000, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0000, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0000, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0000, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0000, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0000, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0000, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0000, 0x0009 },
{ 0x00, 0x00, 0, 0x00, 0x0001, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0001, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0001, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0001, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0001, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0001, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0001, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0001, 0x0009 },
{ 0x00, 0x00, 0, 0x00, 0x0002, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0002, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0002, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0002, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0002, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0002, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0002, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0002, 0x0009 },
{ 0x00, 0x00, 0, 0x00, 0x0003, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0003, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0003, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0003, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0003, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0003, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0003, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0003, 0x0009 },
{ 0x00, 0x00, 0, 0x00, 0x0004, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0004, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0004, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0004, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0004, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0004, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0004, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0004, 0x0009 },
{ 0x00, 0x00, 0, 0x00, 0x0005, 0x0002 },
{ 0x00, 0x00, 0, 0x01, 0x0005, 0x0003 },
{ 0x00, 0x00, 0, 0x02, 0x0005, 0x0004 },
{ 0x00, 0x00, 0, 0x03, 0x0005, 0x0005 },
{ 0x00, 0x00, 0, 0x03, 0x0005, 0x0006 },
{ 0x00, 0x00, 0, 0x03, 0x0005, 0x0007 },
{ 0x00, 0x00, 0, 0x03, 0x0005, 0x0008 },
{ 0x00, 0x00, 0, 0x03, 0x0005, 0x0009 },
{ 0x01, 0x00, 0, 0x00, 0x0006, 0x0002 },
{ 0x01, 0x00, 0, 0x01, 0x0006, 0x0003 },
{ 0x01, 0x00, 0, 0x02, 0x0006, 0x0004 },
{ 0x01, 0x00, 0, 0x03, 0x0006, 0x0005 },
{ 0x01, 0x00, 0, 0x03, 0x0006, 0x0006 },
{ 0x01, 0x00, 0, 0x03, 0x0006, 0x0007 },
{ 0x01, 0x00, 0, 0x03, 0x0006, 0x0008 },
{ 0x01, 0x00, 0, 0x03, 0x0006, 0x0009 },
{ 0x01, 0x00, 0, 0x00, 0x0008, 0x0002 },
{ 0x01, 0x00, 0, 0x01, 0x0008, 0x0003 },
{ 0x01, 0x00, 0, 0x02, 0x0008, 0x0004 },
{ 0x01, 0x00, 0, 0x03, 0x0008, 0x0005 },
{ 0x01, 0x00, 0, 0x03, 0x0008, 0x0006 },
{ 0x01, 0x00, 0, 0x03, 0x0008, 0x0007 },
{ 0x01, 0x00, 0, 0x03, 0x0008, 0x0008 },
{ 0x01, 0x00, 0, 0x03, 0x0008, 0x0009 },
{ 0x00, 0x01, 0, 0x03, 0x0000, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0000, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0000, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0000, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0000, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0000, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0000, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0000, 0x0036 },
{ 0x00, 0x01, 0, 0x03, 0x0001, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0001, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0001, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0001, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0001, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0001, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0001, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0001, 0x0036 },
{ 0x00, 0x01, 0, 0x03, 0x0002, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0002, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0002, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0002, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0002, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0002, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0002, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0002, 0x0036 },
{ 0x00, 0x01, 0, 0x03, 0x0003, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0003, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0003, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0003, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0003, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0003, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0003, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0003, 0x0036 },
{ 0x00, 0x01, 0, 0x03, 0x0004, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0004, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0004, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0004, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0004, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0004, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0004, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0004, 0x0036 },
{ 0x00, 0x01, 0, 0x03, 0x0005, 0x000a },
{ 0x00, 0x01, 0, 0x03, 0x0005, 0x000c },
{ 0x00, 0x02, 0, 0x03, 0x0005, 0x000e },
{ 0x00, 0x02, 0, 0x03, 0x0005, 0x0012 },
{ 0x00, 0x03, 0, 0x03, 0x0005, 0x0016 },
{ 0x00, 0x03, 0, 0x03, 0x0005, 0x001e },
{ 0x00, 0x04, 0, 0x03, 0x0005, 0x0026 },
{ 0x00, 0x04, 0, 0x03, 0x0005, 0x0036 },
{ 0x01, 0x01, 0, 0x03, 0x0006, 0x000a },
{ 0x01, 0x01, 0, 0x03, 0x0006, 0x000c },
{ 0x01, 0x02, 0, 0x03, 0x0006, 0x000e },
{ 0x01, 0x02, 0, 0x03, 0x0006, 0x0012 },
{ 0x01, 0x03, 0, 0x03, 0x0006, 0x0016 },
{ 0x01, 0x03, 0, 0x03, 0x0006, 0x001e },
{ 0x01, 0x04, 0, 0x03, 0x0006, 0x0026 },
{ 0x01, 0x04, 0, 0x03, 0x0006, 0x0036 },
{ 0x01, 0x01, 0, 0x03, 0x0008, 0x000a },
{ 0x01, 0x01, 0, 0x03, 0x0008, 0x000c },
{ 0x01, 0x02, 0, 0x03, 0x0008, 0x000e },
{ 0x01, 0x02, 0, 0x03, 0x0008, 0x0012 },
{ 0x01, 0x03, 0, 0x03, 0x0008, 0x0016 },
{ 0x01, 0x03, 0, 0x03, 0x0008, 0x001e },
{ 0x01, 0x04, 0, 0x03, 0x0008, 0x0026 },
{ 0x01, 0x04, 0, 0x03, 0x0008, 0x0036 },
{ 0x00, 0x00, -1, 0x00, 0x0000, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0000, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0000, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0000, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0000, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0000, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0000, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0000, 0x0009 },
{ 0x00, 0x00, -1, 0x00, 0x0001, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0001, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0001, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0001, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0001, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0001, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0001, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0001, 0x0009 },
{ 0x00, 0x00, -1, 0x00, 0x0002, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0002, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0002, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0002, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0002, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0002, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0002, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0002, 0x0009 },
{ 0x00, 0x00, -1, 0x00, 0x0003, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0003, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0003, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0003, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0003, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0003, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0003, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0003, 0x0009 },
{ 0x00, 0x00, -1, 0x00, 0x0004, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0004, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0004, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0004, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0004, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0004, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0004, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0004, 0x0009 },
{ 0x00, 0x00, -1, 0x00, 0x0005, 0x0002 },
{ 0x00, 0x00, -1, 0x01, 0x0005, 0x0003 },
{ 0x00, 0x00, -1, 0x02, 0x0005, 0x0004 },
{ 0x00, 0x00, -1, 0x03, 0x0005, 0x0005 },
{ 0x00, 0x00, -1, 0x03, 0x0005, 0x0006 },
{ 0x00, 0x00, -1, 0x03, 0x0005, 0x0007 },
{ 0x00, 0x00, -1, 0x03, 0x0005, 0x0008 },
{ 0x00, 0x00, -1, 0x03, 0x0005, 0x0009 },
{ 0x01, 0x00, -1, 0x00, 0x0006, 0x0002 },
{ 0x01, 0x00, -1, 0x01, 0x0006, 0x0003 },
{ 0x01, 0x00, -1, 0x02, 0x0006, 0x0004 },
{ 0x01, 0x00, -1, 0x03, 0x0006, 0x0005 },
{ 0x01, 0x00, -1, 0x03, 0x0006, 0x0006 },
{ 0x01, 0x00, -1, 0x03, 0x0006, 0x0007 },
{ 0x01, 0x00, -1, 0x03, 0x0006, 0x0008 },
{ 0x01, 0x00, -1, 0x03, 0x0006, 0x0009 },
{ 0x01, 0x00, -1, 0x00, 0x0008, 0x0002 },
{ 0x01, 0x00, -1, 0x01, 0x0008, 0x0003 },
{ 0x01, 0x00, -1, 0x02, 0x0008, 0x0004 },
{ 0x01, 0x00, -1, 0x03, 0x0008, 0x0005 },
{ 0x01, 0x00, -1, 0x03, 0x0008, 0x0006 },
{ 0x01, 0x00, -1, 0x03, 0x0008, 0x0007 },
{ 0x01, 0x00, -1, 0x03, 0x0008, 0x0008 },
{ 0x01, 0x00, -1, 0x03, 0x0008, 0x0009 },
{ 0x00, 0x01, -1, 0x03, 0x0000, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0000, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0000, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0000, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0000, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0000, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0000, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0000, 0x0036 },
{ 0x00, 0x01, -1, 0x03, 0x0001, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0001, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0001, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0001, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0001, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0001, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0001, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0001, 0x0036 },
{ 0x00, 0x01, -1, 0x03, 0x0002, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0002, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0002, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0002, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0002, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0002, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0002, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0002, 0x0036 },
{ 0x00, 0x01, -1, 0x03, 0x0003, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0003, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0003, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0003, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0003, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0003, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0003, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0003, 0x0036 },
{ 0x00, 0x01, -1, 0x03, 0x0004, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0004, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0004, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0004, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0004, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0004, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0004, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0004, 0x0036 },
{ 0x00, 0x01, -1, 0x03, 0x0005, 0x000a },
{ 0x00, 0x01, -1, 0x03, 0x0005, 0x000c },
{ 0x00, 0x02, -1, 0x03, 0x0005, 0x000e },
{ 0x00, 0x02, -1, 0x03, 0x0005, 0x0012 },
{ 0x00, 0x03, -1, 0x03, 0x0005, 0x0016 },
{ 0x00, 0x03, -1, 0x03, 0x0005, 0x001e },
{ 0x00, 0x04, -1, 0x03, 0x0005, 0x0026 },
{ 0x00, 0x04, -1, 0x03, 0x0005, 0x0036 },
{ 0x01, 0x01, -1, 0x03, 0x0006, 0x000a },
{ 0x01, 0x01, -1, 0x03, 0x0006, 0x000c },
{ 0x01, 0x02, -1, 0x03, 0x0006, 0x000e },
{ 0x01, 0x02, -1, 0x03, 0x0006, 0x0012 },
{ 0x01, 0x03, -1, 0x03, 0x0006, 0x0016 },
{ 0x01, 0x03, -1, 0x03, 0x0006, 0x001e },
{ 0x01, 0x04, -1, 0x03, 0x0006, 0x0026 },
{ 0x01, 0x04, -1, 0x03, 0x0006, 0x0036 },
{ 0x01, 0x01, -1, 0x03, 0x0008, 0x000a },
{ 0x01, 0x01, -1, 0x03, 0x0008, 0x000c },
{ 0x01, 0x02, -1, 0x03, 0x0008, 0x000e },
{ 0x01, 0x02, -1, 0x03, 0x0008, 0x0012 },
{ 0x01, 0x03, -1, 0x03, 0x0008, 0x0016 },
{ 0x01, 0x03, -1, 0x03, 0x0008, 0x001e },
{ 0x01, 0x04, -1, 0x03, 0x0008, 0x0026 },
{ 0x01, 0x04, -1, 0x03, 0x0008, 0x0036 },
{ 0x02, 0x00, -1, 0x00, 0x000a, 0x0002 },
{ 0x02, 0x00, -1, 0x01, 0x000a, 0x0003 },
{ 0x02, 0x00, -1, 0x02, 0x000a, 0x0004 },
{ 0x02, 0x00, -1, 0x03, 0x000a, 0x0005 },
{ 0x02, 0x00, -1, 0x03, 0x000a, 0x0006 },
{ 0x02, 0x00, -1, 0x03, 0x000a, 0x0007 },
{ 0x02, 0x00, -1, 0x03, 0x000a, 0x0008 },
{ 0x02, 0x00, -1, 0x03, 0x000a, 0x0009 },
{ 0x02, 0x00, -1, 0x00, 0x000e, 0x0002 },
{ 0x02, 0x00, -1, 0x01, 0x000e, 0x0003 },
{ 0x02, 0x00, -1, 0x02, 0x000e, 0x0004 },
{ 0x02, 0x00, -1, 0x03, 0x000e, 0x0005 },
{ 0x02, 0x00, -1, 0x03, 0x000e, 0x0006 },
{ 0x02, 0x00, -1, 0x03, 0x000e, 0x0007 },
{ 0x02, 0x00, -1, 0x03, 0x000e, 0x0008 },
{ 0x02, 0x00, -1, 0x03, 0x000e, 0x0009 },
{ 0x03, 0x00, -1, 0x00, 0x0012, 0x0002 },
{ 0x03, 0x00, -1, 0x01, 0x0012, 0x0003 },
{ 0x03, 0x00, -1, 0x02, 0x0012, 0x0004 },
{ 0x03, 0x00, -1, 0x03, 0x0012, 0x0005 },
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{ 0x05, 0x08, -1, 0x03, 0x0062, 0x0146 },
{ 0x05, 0x09, -1, 0x03, 0x0062, 0x0246 },
{ 0x05, 0x0a, -1, 0x03, 0x0062, 0x0446 },
{ 0x05, 0x18, -1, 0x03, 0x0062, 0x0846 },
{ 0x06, 0x01, -1, 0x03, 0x0082, 0x000a },
{ 0x06, 0x01, -1, 0x03, 0x0082, 0x000c },
{ 0x06, 0x02, -1, 0x03, 0x0082, 0x000e },
{ 0x06, 0x02, -1, 0x03, 0x0082, 0x0012 },
{ 0x06, 0x03, -1, 0x03, 0x0082, 0x0016 },
{ 0x06, 0x03, -1, 0x03, 0x0082, 0x001e },
{ 0x06, 0x04, -1, 0x03, 0x0082, 0x0026 },
{ 0x06, 0x04, -1, 0x03, 0x0082, 0x0036 },
{ 0x07, 0x01, -1, 0x03, 0x00c2, 0x000a },
{ 0x07, 0x01, -1, 0x03, 0x00c2, 0x000c },
{ 0x07, 0x02, -1, 0x03, 0x00c2, 0x000e },
{ 0x07, 0x02, -1, 0x03, 0x00c2, 0x0012 },
{ 0x07, 0x03, -1, 0x03, 0x00c2, 0x0016 },
{ 0x07, 0x03, -1, 0x03, 0x00c2, 0x001e },
{ 0x07, 0x04, -1, 0x03, 0x00c2, 0x0026 },
{ 0x07, 0x04, -1, 0x03, 0x00c2, 0x0036 },
{ 0x08, 0x01, -1, 0x03, 0x0142, 0x000a },
{ 0x08, 0x01, -1, 0x03, 0x0142, 0x000c },
{ 0x08, 0x02, -1, 0x03, 0x0142, 0x000e },
{ 0x08, 0x02, -1, 0x03, 0x0142, 0x0012 },
{ 0x08, 0x03, -1, 0x03, 0x0142, 0x0016 },
{ 0x08, 0x03, -1, 0x03, 0x0142, 0x001e },
{ 0x08, 0x04, -1, 0x03, 0x0142, 0x0026 },
{ 0x08, 0x04, -1, 0x03, 0x0142, 0x0036 },
{ 0x09, 0x01, -1, 0x03, 0x0242, 0x000a },
{ 0x09, 0x01, -1, 0x03, 0x0242, 0x000c },
{ 0x09, 0x02, -1, 0x03, 0x0242, 0x000e },
{ 0x09, 0x02, -1, 0x03, 0x0242, 0x0012 },
{ 0x09, 0x03, -1, 0x03, 0x0242, 0x0016 },
{ 0x09, 0x03, -1, 0x03, 0x0242, 0x001e },
{ 0x09, 0x04, -1, 0x03, 0x0242, 0x0026 },
{ 0x09, 0x04, -1, 0x03, 0x0242, 0x0036 },
{ 0x0a, 0x01, -1, 0x03, 0x0442, 0x000a },
{ 0x0a, 0x01, -1, 0x03, 0x0442, 0x000c },
{ 0x0a, 0x02, -1, 0x03, 0x0442, 0x000e },
{ 0x0a, 0x02, -1, 0x03, 0x0442, 0x0012 },
{ 0x0a, 0x03, -1, 0x03, 0x0442, 0x0016 },
{ 0x0a, 0x03, -1, 0x03, 0x0442, 0x001e },
{ 0x0a, 0x04, -1, 0x03, 0x0442, 0x0026 },
{ 0x0a, 0x04, -1, 0x03, 0x0442, 0x0036 },
{ 0x0c, 0x01, -1, 0x03, 0x0842, 0x000a },
{ 0x0c, 0x01, -1, 0x03, 0x0842, 0x000c },
{ 0x0c, 0x02, -1, 0x03, 0x0842, 0x000e },
{ 0x0c, 0x02, -1, 0x03, 0x0842, 0x0012 },
{ 0x0c, 0x03, -1, 0x03, 0x0842, 0x0016 },
{ 0x0c, 0x03, -1, 0x03, 0x0842, 0x001e },
{ 0x0c, 0x04, -1, 0x03, 0x0842, 0x0026 },
{ 0x0c, 0x04, -1, 0x03, 0x0842, 0x0036 },
{ 0x0e, 0x01, -1, 0x03, 0x1842, 0x000a },
{ 0x0e, 0x01, -1, 0x03, 0x1842, 0x000c },
{ 0x0e, 0x02, -1, 0x03, 0x1842, 0x000e },
{ 0x0e, 0x02, -1, 0x03, 0x1842, 0x0012 },
{ 0x0e, 0x03, -1, 0x03, 0x1842, 0x0016 },
{ 0x0e, 0x03, -1, 0x03, 0x1842, 0x001e },
{ 0x0e, 0x04, -1, 0x03, 0x1842, 0x0026 },
{ 0x0e, 0x04, -1, 0x03, 0x1842, 0x0036 },
{ 0x18, 0x01, -1, 0x03, 0x5842, 0x000a },
{ 0x18, 0x01, -1, 0x03, 0x5842, 0x000c },
{ 0x18, 0x02, -1, 0x03, 0x5842, 0x000e },
{ 0x18, 0x02, -1, 0x03, 0x5842, 0x0012 },
{ 0x18, 0x03, -1, 0x03, 0x5842, 0x0016 },
{ 0x18, 0x03, -1, 0x03, 0x5842, 0x001e },
{ 0x18, 0x04, -1, 0x03, 0x5842, 0x0026 },
{ 0x18, 0x04, -1, 0x03, 0x5842, 0x0036 },
{ 0x06, 0x05, -1, 0x03, 0x0082, 0x0046 },
{ 0x06, 0x05, -1, 0x03, 0x0082, 0x0066 },
{ 0x06, 0x06, -1, 0x03, 0x0082, 0x0086 },
{ 0x06, 0x07, -1, 0x03, 0x0082, 0x00c6 },
{ 0x06, 0x08, -1, 0x03, 0x0082, 0x0146 },
{ 0x06, 0x09, -1, 0x03, 0x0082, 0x0246 },
{ 0x06, 0x0a, -1, 0x03, 0x0082, 0x0446 },
{ 0x06, 0x18, -1, 0x03, 0x0082, 0x0846 },
{ 0x07, 0x05, -1, 0x03, 0x00c2, 0x0046 },
{ 0x07, 0x05, -1, 0x03, 0x00c2, 0x0066 },
{ 0x07, 0x06, -1, 0x03, 0x00c2, 0x0086 },
{ 0x07, 0x07, -1, 0x03, 0x00c2, 0x00c6 },
{ 0x07, 0x08, -1, 0x03, 0x00c2, 0x0146 },
{ 0x07, 0x09, -1, 0x03, 0x00c2, 0x0246 },
{ 0x07, 0x0a, -1, 0x03, 0x00c2, 0x0446 },
{ 0x07, 0x18, -1, 0x03, 0x00c2, 0x0846 },
{ 0x08, 0x05, -1, 0x03, 0x0142, 0x0046 },
{ 0x08, 0x05, -1, 0x03, 0x0142, 0x0066 },
{ 0x08, 0x06, -1, 0x03, 0x0142, 0x0086 },
{ 0x08, 0x07, -1, 0x03, 0x0142, 0x00c6 },
{ 0x08, 0x08, -1, 0x03, 0x0142, 0x0146 },
{ 0x08, 0x09, -1, 0x03, 0x0142, 0x0246 },
{ 0x08, 0x0a, -1, 0x03, 0x0142, 0x0446 },
{ 0x08, 0x18, -1, 0x03, 0x0142, 0x0846 },
{ 0x09, 0x05, -1, 0x03, 0x0242, 0x0046 },
{ 0x09, 0x05, -1, 0x03, 0x0242, 0x0066 },
{ 0x09, 0x06, -1, 0x03, 0x0242, 0x0086 },
{ 0x09, 0x07, -1, 0x03, 0x0242, 0x00c6 },
{ 0x09, 0x08, -1, 0x03, 0x0242, 0x0146 },
{ 0x09, 0x09, -1, 0x03, 0x0242, 0x0246 },
{ 0x09, 0x0a, -1, 0x03, 0x0242, 0x0446 },
{ 0x09, 0x18, -1, 0x03, 0x0242, 0x0846 },
{ 0x0a, 0x05, -1, 0x03, 0x0442, 0x0046 },
{ 0x0a, 0x05, -1, 0x03, 0x0442, 0x0066 },
{ 0x0a, 0x06, -1, 0x03, 0x0442, 0x0086 },
{ 0x0a, 0x07, -1, 0x03, 0x0442, 0x00c6 },
{ 0x0a, 0x08, -1, 0x03, 0x0442, 0x0146 },
{ 0x0a, 0x09, -1, 0x03, 0x0442, 0x0246 },
{ 0x0a, 0x0a, -1, 0x03, 0x0442, 0x0446 },
{ 0x0a, 0x18, -1, 0x03, 0x0442, 0x0846 },
{ 0x0c, 0x05, -1, 0x03, 0x0842, 0x0046 },
{ 0x0c, 0x05, -1, 0x03, 0x0842, 0x0066 },
{ 0x0c, 0x06, -1, 0x03, 0x0842, 0x0086 },
{ 0x0c, 0x07, -1, 0x03, 0x0842, 0x00c6 },
{ 0x0c, 0x08, -1, 0x03, 0x0842, 0x0146 },
{ 0x0c, 0x09, -1, 0x03, 0x0842, 0x0246 },
{ 0x0c, 0x0a, -1, 0x03, 0x0842, 0x0446 },
{ 0x0c, 0x18, -1, 0x03, 0x0842, 0x0846 },
{ 0x0e, 0x05, -1, 0x03, 0x1842, 0x0046 },
{ 0x0e, 0x05, -1, 0x03, 0x1842, 0x0066 },
{ 0x0e, 0x06, -1, 0x03, 0x1842, 0x0086 },
{ 0x0e, 0x07, -1, 0x03, 0x1842, 0x00c6 },
{ 0x0e, 0x08, -1, 0x03, 0x1842, 0x0146 },
{ 0x0e, 0x09, -1, 0x03, 0x1842, 0x0246 },
{ 0x0e, 0x0a, -1, 0x03, 0x1842, 0x0446 },
{ 0x0e, 0x18, -1, 0x03, 0x1842, 0x0846 },
{ 0x18, 0x05, -1, 0x03, 0x5842, 0x0046 },
{ 0x18, 0x05, -1, 0x03, 0x5842, 0x0066 },
{ 0x18, 0x06, -1, 0x03, 0x5842, 0x0086 },
{ 0x18, 0x07, -1, 0x03, 0x5842, 0x00c6 },
{ 0x18, 0x08, -1, 0x03, 0x5842, 0x0146 },
{ 0x18, 0x09, -1, 0x03, 0x5842, 0x0246 },
{ 0x18, 0x0a, -1, 0x03, 0x5842, 0x0446 },
{ 0x18, 0x18, -1, 0x03, 0x5842, 0x0846 },
};
#endif /* BROTLI_DEC_PREFIX_H_ */

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/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#include "state.h"
#include <stdlib.h> /* free, malloc */
#include "../common/dictionary.h"
#include <brotli/types.h>
#include "huffman.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) {
if (!alloc_func) {
s->alloc_func = BrotliDefaultAllocFunc;
s->free_func = BrotliDefaultFreeFunc;
s->memory_manager_opaque = 0;
} else {
s->alloc_func = alloc_func;
s->free_func = free_func;
s->memory_manager_opaque = opaque;
}
s->error_code = 0; /* BROTLI_DECODER_NO_ERROR */
BrotliInitBitReader(&s->br);
s->state = BROTLI_STATE_UNINITED;
s->large_window = 0;
s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE;
s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE;
s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE;
s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE;
s->buffer_length = 0;
s->loop_counter = 0;
s->pos = 0;
s->rb_roundtrips = 0;
s->partial_pos_out = 0;
s->block_type_trees = NULL;
s->block_len_trees = NULL;
s->ringbuffer = NULL;
s->ringbuffer_size = 0;
s->new_ringbuffer_size = 0;
s->ringbuffer_mask = 0;
s->context_map = NULL;
s->context_modes = NULL;
s->dist_context_map = NULL;
s->context_map_slice = NULL;
s->dist_context_map_slice = NULL;
s->literal_hgroup.codes = NULL;
s->literal_hgroup.htrees = NULL;
s->insert_copy_hgroup.codes = NULL;
s->insert_copy_hgroup.htrees = NULL;
s->distance_hgroup.codes = NULL;
s->distance_hgroup.htrees = NULL;
s->is_last_metablock = 0;
s->is_uncompressed = 0;
s->is_metadata = 0;
s->should_wrap_ringbuffer = 0;
s->canny_ringbuffer_allocation = 1;
s->window_bits = 0;
s->max_distance = 0;
s->dist_rb[0] = 16;
s->dist_rb[1] = 15;
s->dist_rb[2] = 11;
s->dist_rb[3] = 4;
s->dist_rb_idx = 0;
s->block_type_trees = NULL;
s->block_len_trees = NULL;
s->mtf_upper_bound = 63;
s->compound_dictionary = NULL;
s->dictionary =
BrotliSharedDictionaryCreateInstance(alloc_func, free_func, opaque);
if (!s->dictionary) return BROTLI_FALSE;
return BROTLI_TRUE;
}
void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
s->meta_block_remaining_len = 0;
s->block_length[0] = 1U << 24;
s->block_length[1] = 1U << 24;
s->block_length[2] = 1U << 24;
s->num_block_types[0] = 1;
s->num_block_types[1] = 1;
s->num_block_types[2] = 1;
s->block_type_rb[0] = 1;
s->block_type_rb[1] = 0;
s->block_type_rb[2] = 1;
s->block_type_rb[3] = 0;
s->block_type_rb[4] = 1;
s->block_type_rb[5] = 0;
s->context_map = NULL;
s->context_modes = NULL;
s->dist_context_map = NULL;
s->context_map_slice = NULL;
s->literal_htree = NULL;
s->dist_context_map_slice = NULL;
s->dist_htree_index = 0;
s->context_lookup = NULL;
s->literal_hgroup.codes = NULL;
s->literal_hgroup.htrees = NULL;
s->insert_copy_hgroup.codes = NULL;
s->insert_copy_hgroup.htrees = NULL;
s->distance_hgroup.codes = NULL;
s->distance_hgroup.htrees = NULL;
}
void BrotliDecoderStateCleanupAfterMetablock(BrotliDecoderState* s) {
BROTLI_DECODER_FREE(s, s->context_modes);
BROTLI_DECODER_FREE(s, s->context_map);
BROTLI_DECODER_FREE(s, s->dist_context_map);
BROTLI_DECODER_FREE(s, s->literal_hgroup.htrees);
BROTLI_DECODER_FREE(s, s->insert_copy_hgroup.htrees);
BROTLI_DECODER_FREE(s, s->distance_hgroup.htrees);
}
void BrotliDecoderStateCleanup(BrotliDecoderState* s) {
BrotliDecoderStateCleanupAfterMetablock(s);
BROTLI_DECODER_FREE(s, s->compound_dictionary);
BrotliSharedDictionaryDestroyInstance(s->dictionary);
s->dictionary = NULL;
BROTLI_DECODER_FREE(s, s->ringbuffer);
BROTLI_DECODER_FREE(s, s->block_type_trees);
}
BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
HuffmanTreeGroup* group, uint32_t alphabet_size_max,
uint32_t alphabet_size_limit, uint32_t ntrees) {
/* 376 = 256 (1-st level table) + 4 + 7 + 15 + 31 + 63 (2-nd level mix-tables)
This number is discovered "unlimited" "enough" calculator; it is actually
a wee bigger than required in several cases (especially for alphabets with
less than 16 symbols). */
const size_t max_table_size = alphabet_size_limit + 376;
const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size;
const size_t htree_size = sizeof(HuffmanCode*) * ntrees;
/* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */
HuffmanCode** p = (HuffmanCode**)BROTLI_DECODER_ALLOC(s,
code_size + htree_size);
group->alphabet_size_max = (uint16_t)alphabet_size_max;
group->alphabet_size_limit = (uint16_t)alphabet_size_limit;
group->num_htrees = (uint16_t)ntrees;
group->htrees = p;
group->codes = (HuffmanCode*)(&p[ntrees]);
return !!p;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Brotli state for partial streaming decoding. */
#ifndef BROTLI_DEC_STATE_H_
#define BROTLI_DEC_STATE_H_
#include "../common/constants.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/shared_dictionary.h>
#include "../common/transform.h"
#include <brotli/types.h>
#include "bit_reader.h"
#include "huffman.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Graphviz diagram that describes state transitions:
digraph States {
graph [compound=true]
concentrate=true
node [shape="box"]
UNINITED -> {LARGE_WINDOW_BITS -> INITIALIZE}
subgraph cluster_metablock_workflow {
style="rounded"
label=< <B>METABLOCK CYCLE</B> >
METABLOCK_BEGIN -> METABLOCK_HEADER
METABLOCK_HEADER:sw -> METADATA
METABLOCK_HEADER:s -> UNCOMPRESSED
METABLOCK_HEADER:se -> METABLOCK_DONE:ne
METADATA:s -> METABLOCK_DONE:w
UNCOMPRESSED:s -> METABLOCK_DONE:n
METABLOCK_DONE:e -> METABLOCK_BEGIN:e [constraint="false"]
}
INITIALIZE -> METABLOCK_BEGIN
METABLOCK_DONE -> DONE
subgraph cluster_compressed_metablock {
style="rounded"
label=< <B>COMPRESSED METABLOCK</B> >
subgraph cluster_command {
style="rounded"
label=< <B>HOT LOOP</B> >
_METABLOCK_DONE_PORT_ [shape=point style=invis]
{
// Set different shape for nodes returning from "compressed metablock".
node [shape=invhouse]; CMD_INNER CMD_POST_DECODE_LITERALS;
CMD_POST_WRAP_COPY; CMD_INNER_WRITE; CMD_POST_WRITE_1;
}
CMD_BEGIN -> CMD_INNER -> CMD_POST_DECODE_LITERALS -> CMD_POST_WRAP_COPY
// IO ("write") nodes are not in the hot loop!
CMD_INNER_WRITE [style=dashed]
CMD_INNER -> CMD_INNER_WRITE
CMD_POST_WRITE_1 [style=dashed]
CMD_POST_DECODE_LITERALS -> CMD_POST_WRITE_1
CMD_POST_WRITE_2 [style=dashed]
CMD_POST_WRAP_COPY -> CMD_POST_WRITE_2
CMD_POST_WRITE_1 -> CMD_BEGIN:s [constraint="false"]
CMD_INNER_WRITE -> {CMD_INNER CMD_POST_DECODE_LITERALS}
[constraint="false"]
CMD_BEGIN:ne -> CMD_POST_DECODE_LITERALS [constraint="false"]
CMD_POST_WRAP_COPY -> CMD_BEGIN [constraint="false"]
CMD_POST_DECODE_LITERALS -> CMD_BEGIN:ne [constraint="false"]
CMD_POST_WRITE_2 -> CMD_POST_WRAP_COPY [constraint="false"]
{rank=same; CMD_BEGIN; CMD_INNER; CMD_POST_DECODE_LITERALS;
CMD_POST_WRAP_COPY}
{rank=same; CMD_INNER_WRITE; CMD_POST_WRITE_1; CMD_POST_WRITE_2}
{CMD_INNER CMD_POST_DECODE_LITERALS CMD_POST_WRAP_COPY} ->
_METABLOCK_DONE_PORT_ [style=invis]
{CMD_INNER_WRITE CMD_POST_WRITE_1} -> _METABLOCK_DONE_PORT_
[constraint="false" style=invis]
}
BEFORE_COMPRESSED_METABLOCK_HEADER:s -> HUFFMAN_CODE_0:n
HUFFMAN_CODE_0 -> HUFFMAN_CODE_1 -> HUFFMAN_CODE_2 -> HUFFMAN_CODE_3
HUFFMAN_CODE_0 -> METABLOCK_HEADER_2 -> CONTEXT_MODES -> CONTEXT_MAP_1
CONTEXT_MAP_1 -> CONTEXT_MAP_2 -> TREE_GROUP
TREE_GROUP -> BEFORE_COMPRESSED_METABLOCK_BODY:e
BEFORE_COMPRESSED_METABLOCK_BODY:s -> CMD_BEGIN:n
HUFFMAN_CODE_3:e -> HUFFMAN_CODE_0:ne [constraint="false"]
{rank=same; HUFFMAN_CODE_0; HUFFMAN_CODE_1; HUFFMAN_CODE_2; HUFFMAN_CODE_3}
{rank=same; METABLOCK_HEADER_2; CONTEXT_MODES; CONTEXT_MAP_1; CONTEXT_MAP_2;
TREE_GROUP}
}
METABLOCK_HEADER:e -> BEFORE_COMPRESSED_METABLOCK_HEADER:n
_METABLOCK_DONE_PORT_ -> METABLOCK_DONE:se
[constraint="false" ltail=cluster_command]
UNINITED [shape=Mdiamond];
DONE [shape=Msquare];
}
*/
typedef enum {
BROTLI_STATE_UNINITED,
BROTLI_STATE_LARGE_WINDOW_BITS,
BROTLI_STATE_INITIALIZE,
BROTLI_STATE_METABLOCK_BEGIN,
BROTLI_STATE_METABLOCK_HEADER,
BROTLI_STATE_METABLOCK_HEADER_2,
BROTLI_STATE_CONTEXT_MODES,
BROTLI_STATE_COMMAND_BEGIN,
BROTLI_STATE_COMMAND_INNER,
BROTLI_STATE_COMMAND_POST_DECODE_LITERALS,
BROTLI_STATE_COMMAND_POST_WRAP_COPY,
BROTLI_STATE_UNCOMPRESSED,
BROTLI_STATE_METADATA,
BROTLI_STATE_COMMAND_INNER_WRITE,
BROTLI_STATE_METABLOCK_DONE,
BROTLI_STATE_COMMAND_POST_WRITE_1,
BROTLI_STATE_COMMAND_POST_WRITE_2,
BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER,
BROTLI_STATE_HUFFMAN_CODE_0,
BROTLI_STATE_HUFFMAN_CODE_1,
BROTLI_STATE_HUFFMAN_CODE_2,
BROTLI_STATE_HUFFMAN_CODE_3,
BROTLI_STATE_CONTEXT_MAP_1,
BROTLI_STATE_CONTEXT_MAP_2,
BROTLI_STATE_TREE_GROUP,
BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY,
BROTLI_STATE_DONE
} BrotliRunningState;
typedef enum {
BROTLI_STATE_METABLOCK_HEADER_NONE,
BROTLI_STATE_METABLOCK_HEADER_EMPTY,
BROTLI_STATE_METABLOCK_HEADER_NIBBLES,
BROTLI_STATE_METABLOCK_HEADER_SIZE,
BROTLI_STATE_METABLOCK_HEADER_UNCOMPRESSED,
BROTLI_STATE_METABLOCK_HEADER_RESERVED,
BROTLI_STATE_METABLOCK_HEADER_BYTES,
BROTLI_STATE_METABLOCK_HEADER_METADATA
} BrotliRunningMetablockHeaderState;
typedef enum {
BROTLI_STATE_UNCOMPRESSED_NONE,
BROTLI_STATE_UNCOMPRESSED_WRITE
} BrotliRunningUncompressedState;
typedef enum {
BROTLI_STATE_TREE_GROUP_NONE,
BROTLI_STATE_TREE_GROUP_LOOP
} BrotliRunningTreeGroupState;
typedef enum {
BROTLI_STATE_CONTEXT_MAP_NONE,
BROTLI_STATE_CONTEXT_MAP_READ_PREFIX,
BROTLI_STATE_CONTEXT_MAP_HUFFMAN,
BROTLI_STATE_CONTEXT_MAP_DECODE,
BROTLI_STATE_CONTEXT_MAP_TRANSFORM
} BrotliRunningContextMapState;
typedef enum {
BROTLI_STATE_HUFFMAN_NONE,
BROTLI_STATE_HUFFMAN_SIMPLE_SIZE,
BROTLI_STATE_HUFFMAN_SIMPLE_READ,
BROTLI_STATE_HUFFMAN_SIMPLE_BUILD,
BROTLI_STATE_HUFFMAN_COMPLEX,
BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS
} BrotliRunningHuffmanState;
typedef enum {
BROTLI_STATE_DECODE_UINT8_NONE,
BROTLI_STATE_DECODE_UINT8_SHORT,
BROTLI_STATE_DECODE_UINT8_LONG
} BrotliRunningDecodeUint8State;
typedef enum {
BROTLI_STATE_READ_BLOCK_LENGTH_NONE,
BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX
} BrotliRunningReadBlockLengthState;
/* BrotliDecoderState addon, used for Compound Dictionary functionality. */
typedef struct BrotliDecoderCompoundDictionary {
int num_chunks;
int total_size;
int br_index;
int br_offset;
int br_length;
int br_copied;
const uint8_t* chunks[16];
int chunk_offsets[16];
int block_bits;
uint8_t block_map[256];
} BrotliDecoderCompoundDictionary;
typedef struct BrotliMetablockHeaderArena {
BrotliRunningTreeGroupState substate_tree_group;
BrotliRunningContextMapState substate_context_map;
BrotliRunningHuffmanState substate_huffman;
uint32_t sub_loop_counter;
uint32_t repeat_code_len;
uint32_t prev_code_len;
/* For ReadHuffmanCode. */
uint32_t symbol;
uint32_t repeat;
uint32_t space;
/* Huffman table for "histograms". */
HuffmanCode table[32];
/* List of heads of symbol chains. */
uint16_t* symbol_lists;
/* Storage from symbol_lists. */
uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 +
BROTLI_NUM_COMMAND_SYMBOLS];
/* Tails of symbol chains. */
int next_symbol[32];
uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES];
/* Population counts for the code lengths. */
uint16_t code_length_histo[16];
/* For HuffmanTreeGroupDecode. */
int htree_index;
HuffmanCode* next;
/* For DecodeContextMap. */
uint32_t context_index;
uint32_t max_run_length_prefix;
uint32_t code;
HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272];
} BrotliMetablockHeaderArena;
typedef struct BrotliMetablockBodyArena {
uint8_t dist_extra_bits[544];
uint32_t dist_offset[544];
} BrotliMetablockBodyArena;
struct BrotliDecoderStateStruct {
BrotliRunningState state;
/* This counter is reused for several disjoint loops. */
int loop_counter;
BrotliBitReader br;
brotli_alloc_func alloc_func;
brotli_free_func free_func;
void* memory_manager_opaque;
/* Temporary storage for remaining input. Brotli stream format is designed in
a way, that 64 bits are enough to make progress in decoding. */
union {
uint64_t u64;
uint8_t u8[8];
} buffer;
uint32_t buffer_length;
int pos;
int max_backward_distance;
int max_distance;
int ringbuffer_size;
int ringbuffer_mask;
int dist_rb_idx;
int dist_rb[4];
int error_code;
uint8_t* ringbuffer;
uint8_t* ringbuffer_end;
HuffmanCode* htree_command;
const uint8_t* context_lookup;
uint8_t* context_map_slice;
uint8_t* dist_context_map_slice;
/* This ring buffer holds a few past copy distances that will be used by
some special distance codes. */
HuffmanTreeGroup literal_hgroup;
HuffmanTreeGroup insert_copy_hgroup;
HuffmanTreeGroup distance_hgroup;
HuffmanCode* block_type_trees;
HuffmanCode* block_len_trees;
/* This is true if the literal context map histogram type always matches the
block type. It is then not needed to keep the context (faster decoding). */
int trivial_literal_context;
/* Distance context is actual after command is decoded and before distance is
computed. After distance computation it is used as a temporary variable. */
int distance_context;
int meta_block_remaining_len;
uint32_t block_length_index;
uint32_t block_length[3];
uint32_t num_block_types[3];
uint32_t block_type_rb[6];
uint32_t distance_postfix_bits;
uint32_t num_direct_distance_codes;
uint32_t num_dist_htrees;
uint8_t* dist_context_map;
HuffmanCode* literal_htree;
uint8_t dist_htree_index;
int copy_length;
int distance_code;
/* For partial write operations. */
size_t rb_roundtrips; /* how many times we went around the ring-buffer */
size_t partial_pos_out; /* how much output to the user in total */
/* For InverseMoveToFrontTransform. */
uint32_t mtf_upper_bound;
uint32_t mtf[64 + 1];
/* Less used attributes are at the end of this struct. */
/* States inside function calls. */
BrotliRunningMetablockHeaderState substate_metablock_header;
BrotliRunningUncompressedState substate_uncompressed;
BrotliRunningDecodeUint8State substate_decode_uint8;
BrotliRunningReadBlockLengthState substate_read_block_length;
unsigned int is_last_metablock : 1;
unsigned int is_uncompressed : 1;
unsigned int is_metadata : 1;
unsigned int should_wrap_ringbuffer : 1;
unsigned int canny_ringbuffer_allocation : 1;
unsigned int large_window : 1;
unsigned int size_nibbles : 8;
uint32_t window_bits;
int new_ringbuffer_size;
uint32_t num_literal_htrees;
uint8_t* context_map;
uint8_t* context_modes;
BrotliSharedDictionary* dictionary;
BrotliDecoderCompoundDictionary* compound_dictionary;
uint32_t trivial_literal_contexts[8]; /* 256 bits */
union {
BrotliMetablockHeaderArena header;
BrotliMetablockBodyArena body;
} arena;
};
typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal;
#define BrotliDecoderState BrotliDecoderStateInternal
BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
BROTLI_INTERNAL void BrotliDecoderStateCleanup(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock(
BrotliDecoderState* s);
BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(
BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size_max,
uint32_t alphabet_size_limit, uint32_t ntrees);
#define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L)
#define BROTLI_DECODER_FREE(S, X) { \
S->free_func(S->memory_manager_opaque, X); \
X = NULL; \
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_STATE_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* API for Brotli decompression.
*/
#ifndef BROTLI_DEC_DECODE_H_
#define BROTLI_DEC_DECODE_H_
#include <brotli/port.h>
#include <brotli/shared_dictionary.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/**
* Opaque structure that holds decoder state.
*
* Allocated and initialized with ::BrotliDecoderCreateInstance.
* Cleaned up and deallocated with ::BrotliDecoderDestroyInstance.
*/
typedef struct BrotliDecoderStateStruct BrotliDecoderState;
/**
* Result type for ::BrotliDecoderDecompress and
* ::BrotliDecoderDecompressStream functions.
*/
typedef enum {
/** Decoding error, e.g. corrupted input or memory allocation problem. */
BROTLI_DECODER_RESULT_ERROR = 0,
/** Decoding successfully completed. */
BROTLI_DECODER_RESULT_SUCCESS = 1,
/** Partially done; should be called again with more input. */
BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT = 2,
/** Partially done; should be called again with more output. */
BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT = 3
} BrotliDecoderResult;
/**
* Template that evaluates items of ::BrotliDecoderErrorCode.
*
* Example: @code {.cpp}
* // Log Brotli error code.
* switch (brotliDecoderErrorCode) {
* #define CASE_(PREFIX, NAME, CODE) \
* case BROTLI_DECODER ## PREFIX ## NAME: \
* LOG(INFO) << "error code:" << #NAME; \
* break;
* #define NEWLINE_
* BROTLI_DECODER_ERROR_CODES_LIST(CASE_, NEWLINE_)
* #undef CASE_
* #undef NEWLINE_
* default: LOG(FATAL) << "unknown brotli error code";
* }
* @endcode
*/
#define BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE, SEPARATOR) \
BROTLI_ERROR_CODE(_, NO_ERROR, 0) SEPARATOR \
/* Same as BrotliDecoderResult values */ \
BROTLI_ERROR_CODE(_, SUCCESS, 1) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_INPUT, 2) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_OUTPUT, 3) SEPARATOR \
\
/* Errors caused by invalid input */ \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_NIBBLE, -1) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, RESERVED, -2) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_META_NIBBLE, -3) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_ALPHABET, -4) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_SAME, -5) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CL_SPACE, -6) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, HUFFMAN_SPACE, -7) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CONTEXT_MAP_REPEAT, -8) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_1, -9) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_2, -10) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, TRANSFORM, -11) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, DICTIONARY, -12) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, WINDOW_BITS, -13) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_1, -14) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_2, -15) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, DISTANCE, -16) SEPARATOR \
\
/* -17 code is reserved */ \
\
BROTLI_ERROR_CODE(_ERROR_, COMPOUND_DICTIONARY, -18) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_, DICTIONARY_NOT_SET, -19) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_, INVALID_ARGUMENTS, -20) SEPARATOR \
\
/* Memory allocation problems */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MODES, -21) SEPARATOR \
/* Literal, insert and distance trees together */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, TREE_GROUPS, -22) SEPARATOR \
/* -23..-24 codes are reserved for distinct tree groups */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MAP, -25) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_1, -26) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_2, -27) SEPARATOR \
/* -28..-29 codes are reserved for dynamic ring-buffer allocation */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, BLOCK_TYPE_TREES, -30) SEPARATOR \
\
/* "Impossible" states */ \
BROTLI_ERROR_CODE(_ERROR_, UNREACHABLE, -31)
/**
* Error code for detailed logging / production debugging.
*
* See ::BrotliDecoderGetErrorCode and ::BROTLI_LAST_ERROR_CODE.
*/
typedef enum {
#define BROTLI_COMMA_ ,
#define BROTLI_ERROR_CODE_ENUM_ITEM_(PREFIX, NAME, CODE) \
BROTLI_DECODER ## PREFIX ## NAME = CODE
BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE_ENUM_ITEM_, BROTLI_COMMA_)
} BrotliDecoderErrorCode;
#undef BROTLI_ERROR_CODE_ENUM_ITEM_
#undef BROTLI_COMMA_
/**
* The value of the last error code, negative integer.
*
* All other error code values are in the range from ::BROTLI_LAST_ERROR_CODE
* to @c -1. There are also 4 other possible non-error codes @c 0 .. @c 3 in
* ::BrotliDecoderErrorCode enumeration.
*/
#define BROTLI_LAST_ERROR_CODE BROTLI_DECODER_ERROR_UNREACHABLE
/** Options to be used with ::BrotliDecoderSetParameter. */
typedef enum BrotliDecoderParameter {
/**
* Disable "canny" ring buffer allocation strategy.
*
* Ring buffer is allocated according to window size, despite the real size of
* the content.
*/
BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION = 0,
/**
* Flag that determines if "Large Window Brotli" is used.
*/
BROTLI_DECODER_PARAM_LARGE_WINDOW = 1
} BrotliDecoderParameter;
/**
* Sets the specified parameter to the given decoder instance.
*
* @param state decoder instance
* @param param parameter to set
* @param value new parameter value
* @returns ::BROTLI_FALSE if parameter is unrecognized, or value is invalid
* @returns ::BROTLI_TRUE if value is accepted
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderSetParameter(
BrotliDecoderState* state, BrotliDecoderParameter param, uint32_t value);
/**
* Adds LZ77 prefix dictionary, adds or replaces built-in static dictionary and
* transforms.
*
* Attached dictionary ownership is not transferred.
* Data provided to this method should be kept accessible until
* decoding is finished and decoder instance is destroyed.
*
* @note Dictionaries can NOT be attached after actual decoding is started.
*
* @param state decoder instance
* @param type dictionary data format
* @param data_size length of memory region pointed by @p data
* @param data dictionary data in format corresponding to @p type
* @returns ::BROTLI_FALSE if dictionary is corrupted,
* or dictionary count limit is reached
* @returns ::BROTLI_TRUE if dictionary is accepted / attached
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderAttachDictionary(
BrotliDecoderState* state, BrotliSharedDictionaryType type,
size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]);
/**
* Creates an instance of ::BrotliDecoderState and initializes it.
*
* The instance can be used once for decoding and should then be destroyed with
* ::BrotliDecoderDestroyInstance, it cannot be reused for a new decoding
* session.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
* @returns @c 0 if instance can not be allocated or initialized
* @returns pointer to initialized ::BrotliDecoderState otherwise
*/
BROTLI_DEC_API BrotliDecoderState* BrotliDecoderCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/**
* Deinitializes and frees ::BrotliDecoderState instance.
*
* @param state decoder instance to be cleaned up and deallocated
*/
BROTLI_DEC_API void BrotliDecoderDestroyInstance(BrotliDecoderState* state);
/**
* Performs one-shot memory-to-memory decompression.
*
* Decompresses the data in @p encoded_buffer into @p decoded_buffer, and sets
* @p *decoded_size to the decompressed length.
*
* @param encoded_size size of @p encoded_buffer
* @param encoded_buffer compressed data buffer with at least @p encoded_size
* addressable bytes
* @param[in, out] decoded_size @b in: size of @p decoded_buffer; \n
* @b out: length of decompressed data written to
* @p decoded_buffer
* @param decoded_buffer decompressed data destination buffer
* @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory
* allocation failed, or @p decoded_buffer is not large enough;
* @returns ::BROTLI_DECODER_RESULT_SUCCESS otherwise
*/
BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompress(
size_t encoded_size,
const uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(encoded_size)],
size_t* decoded_size,
uint8_t decoded_buffer[BROTLI_ARRAY_PARAM(*decoded_size)]);
/**
* Decompresses the input stream to the output stream.
*
* The values @p *available_in and @p *available_out must specify the number of
* bytes addressable at @p *next_in and @p *next_out respectively.
* When @p *available_out is @c 0, @p next_out is allowed to be @c NULL.
*
* After each call, @p *available_in will be decremented by the amount of input
* bytes consumed, and the @p *next_in pointer will be incremented by that
* amount. Similarly, @p *available_out will be decremented by the amount of
* output bytes written, and the @p *next_out pointer will be incremented by
* that amount.
*
* @p total_out, if it is not a null-pointer, will be set to the number
* of bytes decompressed since the last @p state initialization.
*
* @note Input is never overconsumed, so @p next_in and @p available_in could be
* passed to the next consumer after decoding is complete.
*
* @param state decoder instance
* @param[in, out] available_in @b in: amount of available input; \n
* @b out: amount of unused input
* @param[in, out] next_in pointer to the next compressed byte
* @param[in, out] available_out @b in: length of output buffer; \n
* @b out: remaining size of output buffer
* @param[in, out] next_out output buffer cursor;
* can be @c NULL if @p available_out is @c 0
* @param[out] total_out number of bytes decompressed so far; can be @c NULL
* @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory
* allocation failed, arguments were invalid, etc.;
* use ::BrotliDecoderGetErrorCode to get detailed error code
* @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT decoding is blocked until
* more input data is provided
* @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT decoding is blocked until
* more output space is provided
* @returns ::BROTLI_DECODER_RESULT_SUCCESS decoding is finished, no more
* input might be consumed and no more output will be produced
*/
BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompressStream(
BrotliDecoderState* state, size_t* available_in, const uint8_t** next_in,
size_t* available_out, uint8_t** next_out, size_t* total_out);
/**
* Checks if decoder has more output.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE, if decoder has some unconsumed output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderHasMoreOutput(
const BrotliDecoderState* state);
/**
* Acquires pointer to internal output buffer.
*
* This method is used to make language bindings easier and more efficient:
* -# push data to ::BrotliDecoderDecompressStream,
* until ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT is reported
* -# use ::BrotliDecoderTakeOutput to peek bytes and copy to language-specific
* entity
*
* Also this could be useful if there is an output stream that is able to
* consume all the provided data (e.g. when data is saved to file system).
*
* @attention After every call to ::BrotliDecoderTakeOutput @p *size bytes of
* output are considered consumed for all consecutive calls to the
* instance methods; returned pointer becomes invalidated as well.
*
* @note Decoder output is not guaranteed to be contiguous. This means that
* after the size-unrestricted call to ::BrotliDecoderTakeOutput,
* immediate next call to ::BrotliDecoderTakeOutput may return more data.
*
* @param state decoder instance
* @param[in, out] size @b in: number of bytes caller is ready to take, @c 0 if
* any amount could be handled; \n
* @b out: amount of data pointed by returned pointer and
* considered consumed; \n
* out value is never greater than in value, unless it is @c 0
* @returns pointer to output data
*/
BROTLI_DEC_API const uint8_t* BrotliDecoderTakeOutput(
BrotliDecoderState* state, size_t* size);
/**
* Checks if instance has already consumed input.
*
* Instance that returns ::BROTLI_FALSE is considered "fresh" and could be
* reused.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE if decoder has already used some input bytes
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* state);
/**
* Checks if decoder instance reached the final state.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE if decoder is in a state where it reached the end of
* the input and produced all of the output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsFinished(
const BrotliDecoderState* state);
/**
* Acquires a detailed error code.
*
* Should be used only after ::BrotliDecoderDecompressStream returns
* ::BROTLI_DECODER_RESULT_ERROR.
*
* See also ::BrotliDecoderErrorString
*
* @param state decoder instance
* @returns last saved error code
*/
BROTLI_DEC_API BrotliDecoderErrorCode BrotliDecoderGetErrorCode(
const BrotliDecoderState* state);
/**
* Converts error code to a c-string.
*/
BROTLI_DEC_API const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c);
/**
* Gets a decoder library version.
*
* Look at BROTLI_VERSION for more information.
*/
BROTLI_DEC_API uint32_t BrotliDecoderVersion(void);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_DECODE_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* API for Brotli compression.
*/
#ifndef BROTLI_ENC_ENCODE_H_
#define BROTLI_ENC_ENCODE_H_
#include <brotli/port.h>
#include <brotli/shared_dictionary.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/** Minimal value for ::BROTLI_PARAM_LGWIN parameter. */
#define BROTLI_MIN_WINDOW_BITS 10
/**
* Maximal value for ::BROTLI_PARAM_LGWIN parameter.
*
* @note equal to @c BROTLI_MAX_DISTANCE_BITS constant.
*/
#define BROTLI_MAX_WINDOW_BITS 24
/**
* Maximal value for ::BROTLI_PARAM_LGWIN parameter
* in "Large Window Brotli" (32-bit).
*/
#define BROTLI_LARGE_MAX_WINDOW_BITS 30
/** Minimal value for ::BROTLI_PARAM_LGBLOCK parameter. */
#define BROTLI_MIN_INPUT_BLOCK_BITS 16
/** Maximal value for ::BROTLI_PARAM_LGBLOCK parameter. */
#define BROTLI_MAX_INPUT_BLOCK_BITS 24
/** Minimal value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_MIN_QUALITY 0
/** Maximal value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_MAX_QUALITY 11
/** Options for ::BROTLI_PARAM_MODE parameter. */
typedef enum BrotliEncoderMode {
/**
* Default compression mode.
*
* In this mode compressor does not know anything in advance about the
* properties of the input.
*/
BROTLI_MODE_GENERIC = 0,
/** Compression mode for UTF-8 formatted text input. */
BROTLI_MODE_TEXT = 1,
/** Compression mode used in WOFF 2.0. */
BROTLI_MODE_FONT = 2
} BrotliEncoderMode;
/** Default value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_DEFAULT_QUALITY 11
/** Default value for ::BROTLI_PARAM_LGWIN parameter. */
#define BROTLI_DEFAULT_WINDOW 22
/** Default value for ::BROTLI_PARAM_MODE parameter. */
#define BROTLI_DEFAULT_MODE BROTLI_MODE_GENERIC
/** Operations that can be performed by streaming encoder. */
typedef enum BrotliEncoderOperation {
/**
* Process input.
*
* Encoder may postpone producing output, until it has processed enough input.
*/
BROTLI_OPERATION_PROCESS = 0,
/**
* Produce output for all processed input.
*
* Actual flush is performed when input stream is depleted and there is enough
* space in output stream. This means that client should repeat
* ::BROTLI_OPERATION_FLUSH operation until @p available_in becomes @c 0, and
* ::BrotliEncoderHasMoreOutput returns ::BROTLI_FALSE. If output is acquired
* via ::BrotliEncoderTakeOutput, then operation should be repeated after
* output buffer is drained.
*
* @warning Until flush is complete, client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* When flush is complete, output data will be sufficient for decoder to
* reproduce all the given input.
*/
BROTLI_OPERATION_FLUSH = 1,
/**
* Finalize the stream.
*
* Actual finalization is performed when input stream is depleted and there is
* enough space in output stream. This means that client should repeat
* ::BROTLI_OPERATION_FINISH operation until @p available_in becomes @c 0, and
* ::BrotliEncoderHasMoreOutput returns ::BROTLI_FALSE. If output is acquired
* via ::BrotliEncoderTakeOutput, then operation should be repeated after
* output buffer is drained.
*
* @warning Until finalization is complete, client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* Helper function ::BrotliEncoderIsFinished checks if stream is finalized and
* output fully dumped.
*
* Adding more input data to finalized stream is impossible.
*/
BROTLI_OPERATION_FINISH = 2,
/**
* Emit metadata block to stream.
*
* Metadata is opaque to Brotli: neither encoder, nor decoder processes this
* data or relies on it. It may be used to pass some extra information from
* encoder client to decoder client without interfering with main data stream.
*
* @note Encoder may emit empty metadata blocks internally, to pad encoded
* stream to byte boundary.
*
* @warning Until emitting metadata is complete client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* @warning The whole content of input buffer is considered to be the content
* of metadata block. Do @b NOT @e append metadata to input stream,
* before it is depleted with other operations.
*
* Stream is soft-flushed before metadata block is emitted. Metadata block
* @b MUST be no longer than than 16MiB.
*/
BROTLI_OPERATION_EMIT_METADATA = 3
} BrotliEncoderOperation;
/** Options to be used with ::BrotliEncoderSetParameter. */
typedef enum BrotliEncoderParameter {
/**
* Tune encoder for specific input.
*
* ::BrotliEncoderMode enumerates all available values.
*/
BROTLI_PARAM_MODE = 0,
/**
* The main compression speed-density lever.
*
* The higher the quality, the slower the compression. Range is
* from ::BROTLI_MIN_QUALITY to ::BROTLI_MAX_QUALITY.
*/
BROTLI_PARAM_QUALITY = 1,
/**
* Recommended sliding LZ77 window size.
*
* Encoder may reduce this value, e.g. if input is much smaller than
* window size.
*
* Window size is `(1 << value) - 16`.
*
* Range is from ::BROTLI_MIN_WINDOW_BITS to ::BROTLI_MAX_WINDOW_BITS.
*/
BROTLI_PARAM_LGWIN = 2,
/**
* Recommended input block size.
*
* Encoder may reduce this value, e.g. if input is much smaller than input
* block size.
*
* Range is from ::BROTLI_MIN_INPUT_BLOCK_BITS to
* ::BROTLI_MAX_INPUT_BLOCK_BITS.
*
* @note Bigger input block size allows better compression, but consumes more
* memory. \n The rough formula of memory used for temporary input
* storage is `3 << lgBlock`.
*/
BROTLI_PARAM_LGBLOCK = 3,
/**
* Flag that affects usage of "literal context modeling" format feature.
*
* This flag is a "decoding-speed vs compression ratio" trade-off.
*/
BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING = 4,
/**
* Estimated total input size for all ::BrotliEncoderCompressStream calls.
*
* The default value is 0, which means that the total input size is unknown.
*/
BROTLI_PARAM_SIZE_HINT = 5,
/**
* Flag that determines if "Large Window Brotli" is used.
*/
BROTLI_PARAM_LARGE_WINDOW = 6,
/**
* Recommended number of postfix bits (NPOSTFIX).
*
* Encoder may change this value.
*
* Range is from 0 to ::BROTLI_MAX_NPOSTFIX.
*/
BROTLI_PARAM_NPOSTFIX = 7,
/**
* Recommended number of direct distance codes (NDIRECT).
*
* Encoder may change this value.
*
* Range is from 0 to (15 << NPOSTFIX) in steps of (1 << NPOSTFIX).
*/
BROTLI_PARAM_NDIRECT = 8,
/**
* Number of bytes of input stream already processed by a different instance.
*
* @note It is important to configure all the encoder instances with same
* parameters (except this one) in order to allow all the encoded parts
* obey the same restrictions implied by header.
*
* If offset is not 0, then stream header is omitted.
* In any case output start is byte aligned, so for proper streams stitching
* "predecessor" stream must be flushed.
*
* Range is not artificially limited, but all the values greater or equal to
* maximal window size have the same effect. Values greater than 2**30 are not
* allowed.
*/
BROTLI_PARAM_STREAM_OFFSET = 9
} BrotliEncoderParameter;
/**
* Opaque structure that holds encoder state.
*
* Allocated and initialized with ::BrotliEncoderCreateInstance.
* Cleaned up and deallocated with ::BrotliEncoderDestroyInstance.
*/
typedef struct BrotliEncoderStateStruct BrotliEncoderState;
/**
* Sets the specified parameter to the given encoder instance.
*
* @param state encoder instance
* @param param parameter to set
* @param value new parameter value
* @returns ::BROTLI_FALSE if parameter is unrecognized, or value is invalid
* @returns ::BROTLI_FALSE if value of parameter can not be changed at current
* encoder state (e.g. when encoding is started, window size might be
* already encoded and therefore it is impossible to change it)
* @returns ::BROTLI_TRUE if value is accepted
* @warning invalid values might be accepted in case they would not break
* encoding process.
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderSetParameter(
BrotliEncoderState* state, BrotliEncoderParameter param, uint32_t value);
/**
* Creates an instance of ::BrotliEncoderState and initializes it.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
* @returns @c 0 if instance can not be allocated or initialized
* @returns pointer to initialized ::BrotliEncoderState otherwise
*/
BROTLI_ENC_API BrotliEncoderState* BrotliEncoderCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/**
* Deinitializes and frees ::BrotliEncoderState instance.
*
* @param state decoder instance to be cleaned up and deallocated
*/
BROTLI_ENC_API void BrotliEncoderDestroyInstance(BrotliEncoderState* state);
/* Opaque type for pointer to different possible internal structures containing
dictionary prepared for the encoder */
typedef struct BrotliEncoderPreparedDictionaryStruct
BrotliEncoderPreparedDictionary;
/**
* Prepares a shared dictionary from the given file format for the encoder.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param type type of dictionary stored in data
* @param data_size size of @p data buffer
* @param data pointer to the dictionary data
* @param quality the maximum Brotli quality to prepare the dictionary for,
* use BROTLI_MAX_QUALITY by default
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
*/
BROTLI_ENC_API BrotliEncoderPreparedDictionary*
BrotliEncoderPrepareDictionary(BrotliSharedDictionaryType type,
size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)],
int quality,
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
BROTLI_ENC_API void BrotliEncoderDestroyPreparedDictionary(
BrotliEncoderPreparedDictionary* dictionary);
/**
* Attaches a prepared dictionary of any type to the encoder. Can be used
* multiple times to attach multiple dictionaries. The dictionary type was
* determined by BrotliEncoderPrepareDictionary. Multiple raw prefix
* dictionaries and/or max 1 serialized dictionary with custom words can be
* attached.
*
* @returns ::BROTLI_FALSE in case of error
* @returns ::BROTLI_TRUE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderAttachPreparedDictionary(
BrotliEncoderState* state,
const BrotliEncoderPreparedDictionary* dictionary);
/**
* Calculates the output size bound for the given @p input_size.
*
* @warning Result is only valid if quality is at least @c 2 and, in
* case ::BrotliEncoderCompressStream was used, no flushes
* (::BROTLI_OPERATION_FLUSH) were performed.
*
* @param input_size size of projected input
* @returns @c 0 if result does not fit @c size_t
*/
BROTLI_ENC_API size_t BrotliEncoderMaxCompressedSize(size_t input_size);
/**
* Performs one-shot memory-to-memory compression.
*
* Compresses the data in @p input_buffer into @p encoded_buffer, and sets
* @p *encoded_size to the compressed length.
*
* @note If ::BrotliEncoderMaxCompressedSize(@p input_size) returns non-zero
* value, then output is guaranteed to be no longer than that.
*
* @note If @p lgwin is greater than ::BROTLI_MAX_WINDOW_BITS then resulting
* stream might be incompatible with RFC 7932; to decode such streams,
* decoder should be configured with
* ::BROTLI_DECODER_PARAM_LARGE_WINDOW = @c 1
*
* @param quality quality parameter value, e.g. ::BROTLI_DEFAULT_QUALITY
* @param lgwin lgwin parameter value, e.g. ::BROTLI_DEFAULT_WINDOW
* @param mode mode parameter value, e.g. ::BROTLI_DEFAULT_MODE
* @param input_size size of @p input_buffer
* @param input_buffer input data buffer with at least @p input_size
* addressable bytes
* @param[in, out] encoded_size @b in: size of @p encoded_buffer; \n
* @b out: length of compressed data written to
* @p encoded_buffer, or @c 0 if compression fails
* @param encoded_buffer compressed data destination buffer
* @returns ::BROTLI_FALSE in case of compression error
* @returns ::BROTLI_FALSE if output buffer is too small
* @returns ::BROTLI_TRUE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderCompress(
int quality, int lgwin, BrotliEncoderMode mode, size_t input_size,
const uint8_t input_buffer[BROTLI_ARRAY_PARAM(input_size)],
size_t* encoded_size,
uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(*encoded_size)]);
/**
* Compresses input stream to output stream.
*
* The values @p *available_in and @p *available_out must specify the number of
* bytes addressable at @p *next_in and @p *next_out respectively.
* When @p *available_out is @c 0, @p next_out is allowed to be @c NULL.
*
* After each call, @p *available_in will be decremented by the amount of input
* bytes consumed, and the @p *next_in pointer will be incremented by that
* amount. Similarly, @p *available_out will be decremented by the amount of
* output bytes written, and the @p *next_out pointer will be incremented by
* that amount.
*
* @p total_out, if it is not a null-pointer, will be set to the number
* of bytes compressed since the last @p state initialization.
*
*
*
* Internally workflow consists of 3 tasks:
* -# (optionally) copy input data to internal buffer
* -# actually compress data and (optionally) store it to internal buffer
* -# (optionally) copy compressed bytes from internal buffer to output stream
*
* Whenever all 3 tasks can't move forward anymore, or error occurs, this
* method returns the control flow to caller.
*
* @p op is used to perform flush, finish the stream, or inject metadata block.
* See ::BrotliEncoderOperation for more information.
*
* Flushing the stream means forcing encoding of all input passed to encoder and
* completing the current output block, so it could be fully decoded by stream
* decoder. To perform flush set @p op to ::BROTLI_OPERATION_FLUSH.
* Under some circumstances (e.g. lack of output stream capacity) this operation
* would require several calls to ::BrotliEncoderCompressStream. The method must
* be called again until both input stream is depleted and encoder has no more
* output (see ::BrotliEncoderHasMoreOutput) after the method is called.
*
* Finishing the stream means encoding of all input passed to encoder and
* adding specific "final" marks, so stream decoder could determine that stream
* is complete. To perform finish set @p op to ::BROTLI_OPERATION_FINISH.
* Under some circumstances (e.g. lack of output stream capacity) this operation
* would require several calls to ::BrotliEncoderCompressStream. The method must
* be called again until both input stream is depleted and encoder has no more
* output (see ::BrotliEncoderHasMoreOutput) after the method is called.
*
* @warning When flushing and finishing, @p op should not change until operation
* is complete; input stream should not be swapped, reduced or
* extended as well.
*
* @param state encoder instance
* @param op requested operation
* @param[in, out] available_in @b in: amount of available input; \n
* @b out: amount of unused input
* @param[in, out] next_in pointer to the next input byte
* @param[in, out] available_out @b in: length of output buffer; \n
* @b out: remaining size of output buffer
* @param[in, out] next_out compressed output buffer cursor;
* can be @c NULL if @p available_out is @c 0
* @param[out] total_out number of bytes produced so far; can be @c NULL
* @returns ::BROTLI_FALSE if there was an error
* @returns ::BROTLI_TRUE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderCompressStream(
BrotliEncoderState* state, BrotliEncoderOperation op, size_t* available_in,
const uint8_t** next_in, size_t* available_out, uint8_t** next_out,
size_t* total_out);
/**
* Checks if encoder instance reached the final state.
*
* @param state encoder instance
* @returns ::BROTLI_TRUE if encoder is in a state where it reached the end of
* the input and produced all of the output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderIsFinished(BrotliEncoderState* state);
/**
* Checks if encoder has more output.
*
* @param state encoder instance
* @returns ::BROTLI_TRUE, if encoder has some unconsumed output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderHasMoreOutput(
BrotliEncoderState* state);
/**
* Acquires pointer to internal output buffer.
*
* This method is used to make language bindings easier and more efficient:
* -# push data to ::BrotliEncoderCompressStream,
* until ::BrotliEncoderHasMoreOutput returns BROTL_TRUE
* -# use ::BrotliEncoderTakeOutput to peek bytes and copy to language-specific
* entity
*
* Also this could be useful if there is an output stream that is able to
* consume all the provided data (e.g. when data is saved to file system).
*
* @attention After every call to ::BrotliEncoderTakeOutput @p *size bytes of
* output are considered consumed for all consecutive calls to the
* instance methods; returned pointer becomes invalidated as well.
*
* @note Encoder output is not guaranteed to be contiguous. This means that
* after the size-unrestricted call to ::BrotliEncoderTakeOutput,
* immediate next call to ::BrotliEncoderTakeOutput may return more data.
*
* @param state encoder instance
* @param[in, out] size @b in: number of bytes caller is ready to take, @c 0 if
* any amount could be handled; \n
* @b out: amount of data pointed by returned pointer and
* considered consumed; \n
* out value is never greater than in value, unless it is @c 0
* @returns pointer to output data
*/
BROTLI_ENC_API const uint8_t* BrotliEncoderTakeOutput(
BrotliEncoderState* state, size_t* size);
/* Returns the estimated peak memory usage (in bytes) of the BrotliCompress()
function, not counting the memory needed for the input and output. */
BROTLI_ENC_EXTRA_API size_t BrotliEncoderEstimatePeakMemoryUsage(
int quality, int lgwin, size_t input_size);
/* Returns 0 if dictionary is not valid; otherwise returns allocation size. */
BROTLI_ENC_EXTRA_API size_t BrotliEncoderGetPreparedDictionarySize(
const BrotliEncoderPreparedDictionary* dictionary);
/**
* Gets an encoder library version.
*
* Look at BROTLI_VERSION for more information.
*/
BROTLI_ENC_API uint32_t BrotliEncoderVersion(void);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_ENCODE_H_ */

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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific API declarations. */
#ifndef BROTLI_COMMON_PORT_H_
#define BROTLI_COMMON_PORT_H_
/* The following macros were borrowed from https://github.com/nemequ/hedley
* with permission of original author - Evan Nemerson <evan@nemerson.com> */
/* >>> >>> >>> hedley macros */
#define BROTLI_MAKE_VERSION(major, minor, revision) \
(((major) * 1000000) + ((minor) * 1000) + (revision))
#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__)
#define BROTLI_GNUC_VERSION \
BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
#elif defined(__GNUC__)
#define BROTLI_GNUC_VERSION BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, 0)
#endif
#if defined(BROTLI_GNUC_VERSION)
#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) \
(BROTLI_GNUC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 140000000)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION((_MSC_FULL_VER / 10000000), \
(_MSC_FULL_VER % 10000000) / 100000, \
(_MSC_FULL_VER % 100000) / 100)
#elif defined(_MSC_FULL_VER)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION((_MSC_FULL_VER / 1000000), \
(_MSC_FULL_VER % 1000000) / 10000, \
(_MSC_FULL_VER % 10000) / 10)
#elif defined(_MSC_VER)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION(_MSC_VER / 100, _MSC_VER % 100, 0)
#endif
#if !defined(_MSC_VER)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) (0)
#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_FULL_VER >= ((major * 10000000) + (minor * 100000) + (patch)))
#elif defined(_MSC_VER) && (_MSC_VER >= 1200)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_FULL_VER >= ((major * 1000000) + (minor * 10000) + (patch)))
#else
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_VER >= ((major * 100) + (minor)))
#endif
#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE)
#define BROTLI_INTEL_VERSION \
BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, \
__INTEL_COMPILER % 100, \
__INTEL_COMPILER_UPDATE)
#elif defined(__INTEL_COMPILER)
#define BROTLI_INTEL_VERSION \
BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, 0)
#endif
#if defined(BROTLI_INTEL_VERSION)
#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) \
(BROTLI_INTEL_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__PGI) && \
defined(__PGIC__) && defined(__PGIC_MINOR__) && defined(__PGIC_PATCHLEVEL__)
#define BROTLI_PGI_VERSION \
BROTLI_MAKE_VERSION(__PGIC__, __PGIC_MINOR__, __PGIC_PATCHLEVEL__)
#endif
#if defined(BROTLI_PGI_VERSION)
#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) \
(BROTLI_PGI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__SUNPRO_C) && (__SUNPRO_C > 0x1000)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION( \
(((__SUNPRO_C >> 16) & 0xf) * 10) + ((__SUNPRO_C >> 12) & 0xf), \
(((__SUNPRO_C >> 8) & 0xf) * 10) + ((__SUNPRO_C >> 4) & 0xf), \
(__SUNPRO_C & 0xf) * 10)
#elif defined(__SUNPRO_C)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION((__SUNPRO_C >> 8) & 0xf, \
(__SUNPRO_C >> 4) & 0xf, \
(__SUNPRO_C) & 0xf)
#elif defined(__SUNPRO_CC) && (__SUNPRO_CC > 0x1000)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION( \
(((__SUNPRO_CC >> 16) & 0xf) * 10) + ((__SUNPRO_CC >> 12) & 0xf), \
(((__SUNPRO_CC >> 8) & 0xf) * 10) + ((__SUNPRO_CC >> 4) & 0xf), \
(__SUNPRO_CC & 0xf) * 10)
#elif defined(__SUNPRO_CC)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION((__SUNPRO_CC >> 8) & 0xf, \
(__SUNPRO_CC >> 4) & 0xf, \
(__SUNPRO_CC) & 0xf)
#endif
#if defined(BROTLI_SUNPRO_VERSION)
#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) \
(BROTLI_SUNPRO_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__CC_ARM) && defined(__ARMCOMPILER_VERSION)
#define BROTLI_ARM_VERSION \
BROTLI_MAKE_VERSION((__ARMCOMPILER_VERSION / 1000000), \
(__ARMCOMPILER_VERSION % 1000000) / 10000, \
(__ARMCOMPILER_VERSION % 10000) / 100)
#elif defined(__CC_ARM) && defined(__ARMCC_VERSION)
#define BROTLI_ARM_VERSION \
BROTLI_MAKE_VERSION((__ARMCC_VERSION / 1000000), \
(__ARMCC_VERSION % 1000000) / 10000, \
(__ARMCC_VERSION % 10000) / 100)
#endif
#if defined(BROTLI_ARM_VERSION)
#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) \
(BROTLI_ARM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__ibmxl__)
#define BROTLI_IBM_VERSION \
BROTLI_MAKE_VERSION(__ibmxl_version__, \
__ibmxl_release__, \
__ibmxl_modification__)
#elif defined(__xlC__) && defined(__xlC_ver__)
#define BROTLI_IBM_VERSION \
BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, (__xlC_ver__ >> 8) & 0xff)
#elif defined(__xlC__)
#define BROTLI_IBM_VERSION BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, 0)
#endif
#if defined(BROTLI_IBM_VERSION)
#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) \
(BROTLI_IBM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__TI_COMPILER_VERSION__)
#define BROTLI_TI_VERSION \
BROTLI_MAKE_VERSION((__TI_COMPILER_VERSION__ / 1000000), \
(__TI_COMPILER_VERSION__ % 1000000) / 1000, \
(__TI_COMPILER_VERSION__ % 1000))
#endif
#if defined(BROTLI_TI_VERSION)
#define BROTLI_TI_VERSION_CHECK(major, minor, patch) \
(BROTLI_TI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_TI_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__IAR_SYSTEMS_ICC__)
#if __VER__ > 1000
#define BROTLI_IAR_VERSION \
BROTLI_MAKE_VERSION((__VER__ / 1000000), \
(__VER__ / 1000) % 1000, \
(__VER__ % 1000))
#else
#define BROTLI_IAR_VERSION BROTLI_MAKE_VERSION(VER / 100, __VER__ % 100, 0)
#endif
#endif
#if defined(BROTLI_IAR_VERSION)
#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) \
(BROTLI_IAR_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__TINYC__)
#define BROTLI_TINYC_VERSION \
BROTLI_MAKE_VERSION(__TINYC__ / 1000, (__TINYC__ / 100) % 10, __TINYC__ % 100)
#endif
#if defined(BROTLI_TINYC_VERSION)
#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) \
(BROTLI_TINYC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__has_attribute)
#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \
__has_attribute(attribute)
#else
#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \
BROTLI_GNUC_VERSION_CHECK(major, minor, patch)
#endif
#if defined(__has_builtin)
#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \
__has_builtin(builtin)
#else
#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \
BROTLI_GNUC_VERSION_CHECK(major, minor, patch)
#endif
#if defined(__has_feature)
#define BROTLI_HAS_FEATURE(feature) __has_feature(feature)
#else
#define BROTLI_HAS_FEATURE(feature) (0)
#endif
#if defined(ADDRESS_SANITIZER) || BROTLI_HAS_FEATURE(address_sanitizer) || \
defined(THREAD_SANITIZER) || BROTLI_HAS_FEATURE(thread_sanitizer) || \
defined(MEMORY_SANITIZER) || BROTLI_HAS_FEATURE(memory_sanitizer)
#define BROTLI_SANITIZED 1
#else
#define BROTLI_SANITIZED 0
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
#define BROTLI_PUBLIC
#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && \
defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__))
#define BROTLI_PUBLIC __attribute__ ((visibility ("default")))
#else
#define BROTLI_PUBLIC
#endif
/* BROTLI_INTERNAL could be defined to override visibility, e.g. for tests. */
#if !defined(BROTLI_INTERNAL)
#if defined(_WIN32) || defined(__CYGWIN__)
#define BROTLI_INTERNAL
#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && \
defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__))
#define BROTLI_INTERNAL __attribute__ ((visibility ("hidden")))
#else
#define BROTLI_INTERNAL
#endif
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!defined(__STDC_NO_VLA__) && !defined(__cplusplus) && \
!defined(__PGI) && !defined(__PGIC__) && !defined(__TINYC__) && \
!defined(__clang__)
#define BROTLI_ARRAY_PARAM(name) (name)
#else
#define BROTLI_ARRAY_PARAM(name)
#endif
/* <<< <<< <<< end of hedley macros. */
#if defined(BROTLI_SHARED_COMPILATION)
#if defined(_WIN32)
#if defined(BROTLICOMMON_SHARED_COMPILATION)
#define BROTLI_COMMON_API __declspec(dllexport)
#else
#define BROTLI_COMMON_API __declspec(dllimport)
#endif /* BROTLICOMMON_SHARED_COMPILATION */
#if defined(BROTLIDEC_SHARED_COMPILATION)
#define BROTLI_DEC_API __declspec(dllexport)
#else
#define BROTLI_DEC_API __declspec(dllimport)
#endif /* BROTLIDEC_SHARED_COMPILATION */
#if defined(BROTLIENC_SHARED_COMPILATION)
#define BROTLI_ENC_API __declspec(dllexport)
#else
#define BROTLI_ENC_API __declspec(dllimport)
#endif /* BROTLIENC_SHARED_COMPILATION */
#else /* _WIN32 */
#define BROTLI_COMMON_API BROTLI_PUBLIC
#define BROTLI_DEC_API BROTLI_PUBLIC
#define BROTLI_ENC_API BROTLI_PUBLIC
#endif /* _WIN32 */
#else /* BROTLI_SHARED_COMPILATION */
#define BROTLI_COMMON_API
#define BROTLI_DEC_API
#define BROTLI_ENC_API
#endif
#if defined(BROTLI_BUILD_ENC_EXTRA_API)
#define BROTLI_ENC_EXTRA_API BROTLI_ENC_API
#else
#define BROTLI_ENC_EXTRA_API BROTLI_INTERNAL
#endif
#endif /* BROTLI_COMMON_PORT_H_ */

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/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* (Opaque) Shared Dictionary definition and utilities. */
#ifndef BROTLI_COMMON_SHARED_DICTIONARY_H_
#define BROTLI_COMMON_SHARED_DICTIONARY_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH 4
#define SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH 31
#define SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS 64
#define SHARED_BROTLI_MAX_COMPOUND_DICTS 15
/**
* Opaque structure that holds shared dictionary data.
*
* Allocated and initialized with ::BrotliSharedDictionaryCreateInstance.
* Cleaned up and deallocated with ::BrotliSharedDictionaryDestroyInstance.
*/
typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionary;
/**
* Input data type for ::BrotliSharedDictionaryAttach.
*/
typedef enum BrotliSharedDictionaryType {
/** Raw LZ77 prefix dictionary. */
BROTLI_SHARED_DICTIONARY_RAW = 0,
/** Serialized shared dictionary. */
BROTLI_SHARED_DICTIONARY_SERIALIZED = 1
} BrotliSharedDictionaryType;
/**
* Creates an instance of ::BrotliSharedDictionary.
*
* Fresh instance has default word dictionary and transforms
* and no LZ77 prefix dictionary.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
* @returns @c 0 if instance can not be allocated or initialized
* @returns pointer to initialized ::BrotliSharedDictionary otherwise
*/
BROTLI_COMMON_API BrotliSharedDictionary* BrotliSharedDictionaryCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/**
* Deinitializes and frees ::BrotliSharedDictionary instance.
*
* @param dict shared dictionary instance to be cleaned up and deallocated
*/
BROTLI_COMMON_API void BrotliSharedDictionaryDestroyInstance(
BrotliSharedDictionary* dict);
/**
* Attaches dictionary to a given instance of ::BrotliSharedDictionary.
*
* Dictionary to be attached is represented in a serialized format as a region
* of memory.
*
* Provided data it partially referenced by a resulting (compound) dictionary,
* and should be kept untouched, while at least one compound dictionary uses it.
* This way memory overhead is kept minimal by the cost of additional resource
* management.
*
* @param dict dictionary to extend
* @param type type of dictionary to attach
* @param data_size size of @p data
* @param data serialized dictionary of type @p type, with at least @p data_size
* addressable bytes
* @returns ::BROTLI_TRUE if provided dictionary is successfully attached
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_COMMON_API BROTLI_BOOL BrotliSharedDictionaryAttach(
BrotliSharedDictionary* dict, BrotliSharedDictionaryType type,
size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_COMMON_SHARED_DICTIONARY_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* Common types used in decoder and encoder API.
*/
#ifndef BROTLI_COMMON_TYPES_H_
#define BROTLI_COMMON_TYPES_H_
#include <stddef.h> /* for size_t */
#if defined(_MSC_VER) && (_MSC_VER < 1600)
typedef __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
#else
#include <stdint.h>
#endif /* defined(_MSC_VER) && (_MSC_VER < 1600) */
/**
* A portable @c bool replacement.
*
* ::BROTLI_BOOL is a "documentation" type: actually it is @c int, but in API it
* denotes a type, whose only values are ::BROTLI_TRUE and ::BROTLI_FALSE.
*
* ::BROTLI_BOOL values passed to Brotli should either be ::BROTLI_TRUE or
* ::BROTLI_FALSE, or be a result of ::TO_BROTLI_BOOL macros.
*
* ::BROTLI_BOOL values returned by Brotli should not be tested for equality
* with @c true, @c false, ::BROTLI_TRUE, ::BROTLI_FALSE, but rather should be
* evaluated, for example: @code{.cpp}
* if (SomeBrotliFunction(encoder, BROTLI_TRUE) &&
* !OtherBrotliFunction(decoder, BROTLI_FALSE)) {
* bool x = !!YetAnotherBrotliFunction(encoder, TO_BROLTI_BOOL(2 * 2 == 4));
* DoSomething(x);
* }
* @endcode
*/
#define BROTLI_BOOL int
/** Portable @c true replacement. */
#define BROTLI_TRUE 1
/** Portable @c false replacement. */
#define BROTLI_FALSE 0
/** @c bool to ::BROTLI_BOOL conversion macros. */
#define TO_BROTLI_BOOL(X) (!!(X) ? BROTLI_TRUE : BROTLI_FALSE)
#define BROTLI_MAKE_UINT64_T(high, low) ((((uint64_t)(high)) << 32) | low)
#define BROTLI_UINT32_MAX (~((uint32_t)0))
#define BROTLI_SIZE_MAX (~((size_t)0))
/**
* Allocating function pointer type.
*
* @param opaque custom memory manager handle provided by client
* @param size requested memory region size; can not be @c 0
* @returns @c 0 in the case of failure
* @returns a valid pointer to a memory region of at least @p size bytes
* long otherwise
*/
typedef void* (*brotli_alloc_func)(void* opaque, size_t size);
/**
* Deallocating function pointer type.
*
* This function @b SHOULD do nothing if @p address is @c 0.
*
* @param opaque custom memory manager handle provided by client
* @param address memory region pointer returned by ::brotli_alloc_func, or @c 0
*/
typedef void (*brotli_free_func)(void* opaque, void* address);
#endif /* BROTLI_COMMON_TYPES_H_ */

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