59e66c515a
In addition to changes in the tables the extended grapheme clustering algorithm has been overhauled. Before I considered a separate state machine to implement the rules. With the new rule GB9c this became more attractive and the design has changed. This change initially had quite an impact on the performance. By making the state machine persistent the performance was improved greatly. Note it is still slower than before due to the larger Unicode tables. Before -------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------- BM_ascii_text<char> 1891 ns 1889 ns 369504 BM_unicode_text<char> 106642 ns 106397 ns 6576 BM_cyrillic_text<char> 73420 ns 73277 ns 9445 BM_japanese_text<char> 62485 ns 62387 ns 11153 BM_emoji_text<char> 1895 ns 1893 ns 369525 BM_ascii_text<wchar_t> 2015 ns 2013 ns 346887 BM_unicode_text<wchar_t> 92119 ns 92017 ns 7598 BM_cyrillic_text<wchar_t> 62637 ns 62568 ns 11117 BM_japanese_text<wchar_t> 53850 ns 53785 ns 12803 BM_emoji_text<wchar_t> 2016 ns 2014 ns 347325 After -------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------- BM_ascii_text<char> 1906 ns 1904 ns 369409 BM_unicode_text<char> 265462 ns 265175 ns 2628 BM_cyrillic_text<char> 181063 ns 180865 ns 3871 BM_japanese_text<char> 130927 ns 130789 ns 5324 BM_emoji_text<char> 1892 ns 1890 ns 370537 BM_ascii_text<wchar_t> 2038 ns 2035 ns 343689 BM_unicode_text<wchar_t> 277603 ns 277282 ns 2526 BM_cyrillic_text<wchar_t> 188558 ns 188339 ns 3727 BM_japanese_text<wchar_t> 133084 ns 132943 ns 5262 BM_emoji_text<wchar_t> 2012 ns 2010 ns 348015 Persistent -------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------- BM_ascii_text<char> 1904 ns 1899 ns 367472 BM_unicode_text<char> 133609 ns 133287 ns 5246 BM_cyrillic_text<char> 90185 ns 89941 ns 7796 BM_japanese_text<char> 75137 ns 74946 ns 9316 BM_emoji_text<char> 1906 ns 1901 ns 368081 BM_ascii_text<wchar_t> 2703 ns 2696 ns 259153 BM_unicode_text<wchar_t> 131497 ns 131168 ns 5341 BM_cyrillic_text<wchar_t> 87071 ns 86840 ns 8076 BM_japanese_text<wchar_t> 72279 ns 72099 ns 9682 BM_emoji_text<wchar_t> 2021 ns 2016 ns 346767
271 lines
12 KiB
C++
271 lines
12 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// WARNING, this entire header is generated by
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// utils/generate_width_estimation_table.py
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// DO NOT MODIFY!
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// UNICODE, INC. LICENSE AGREEMENT - DATA FILES AND SOFTWARE
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//
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// See Terms of Use <https://www.unicode.org/copyright.html>
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// for definitions of Unicode Inc.'s Data Files and Software.
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//
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// NOTICE TO USER: Carefully read the following legal agreement.
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// BY DOWNLOADING, INSTALLING, COPYING OR OTHERWISE USING UNICODE INC.'S
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// DATA FILES ("DATA FILES"), AND/OR SOFTWARE ("SOFTWARE"),
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// YOU UNEQUIVOCALLY ACCEPT, AND AGREE TO BE BOUND BY, ALL OF THE
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// TERMS AND CONDITIONS OF THIS AGREEMENT.
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// IF YOU DO NOT AGREE, DO NOT DOWNLOAD, INSTALL, COPY, DISTRIBUTE OR USE
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// THE DATA FILES OR SOFTWARE.
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//
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// COPYRIGHT AND PERMISSION NOTICE
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//
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// Copyright (c) 1991-2022 Unicode, Inc. All rights reserved.
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// Distributed under the Terms of Use in https://www.unicode.org/copyright.html.
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of the Unicode data files and any associated documentation
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// (the "Data Files") or Unicode software and any associated documentation
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// (the "Software") to deal in the Data Files or Software
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// without restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, and/or sell copies of
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// the Data Files or Software, and to permit persons to whom the Data Files
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// or Software are furnished to do so, provided that either
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// (a) this copyright and permission notice appear with all copies
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// of the Data Files or Software, or
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// (b) this copyright and permission notice appear in associated
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// Documentation.
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//
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// THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS
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// NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL
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// DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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// DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THE DATA FILES OR SOFTWARE.
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//
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// Except as contained in this notice, the name of a copyright holder
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// shall not be used in advertising or otherwise to promote the sale,
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// use or other dealings in these Data Files or Software without prior
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// written authorization of the copyright holder.
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#ifndef _LIBCPP___FORMAT_WIDTH_ESTIMATION_TABLE_H
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#define _LIBCPP___FORMAT_WIDTH_ESTIMATION_TABLE_H
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#include <__algorithm/ranges_upper_bound.h>
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#include <__config>
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#include <cstddef>
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#include <cstdint>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 20
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namespace __width_estimation_table {
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/// The entries of the characters with an estimated width of 2.
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///
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/// Contains the entries for [format.string.std]/12
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/// - Any code point with the East_Asian_Width="W" or East_Asian_Width="F"
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/// Derived Extracted Property as described by UAX #44
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/// - U+4DC0 - U+4DFF (Yijing Hexagram Symbols)
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/// - U+1F300 - U+1F5FF (Miscellaneous Symbols and Pictographs)
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/// - U+1F900 - U+1F9FF (Supplemental Symbols and Pictographs)
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///
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/// The data is generated from
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/// - https://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt
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/// - The "overrides" in [format.string.std]/12
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///
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/// The format of EastAsianWidth.txt is two fields separated by a semicolon.
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/// Field 0: Unicode code point value or range of code point values
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/// Field 1: East_Asian_Width property, consisting of one of the following values:
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/// "A", "F", "H", "N", "Na", "W"
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/// - All code points, assigned or unassigned, that are not listed
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/// explicitly are given the value "N".
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/// - The unassigned code points in the following blocks default to "W":
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/// CJK Unified Ideographs Extension A: U+3400..U+4DBF
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/// CJK Unified Ideographs: U+4E00..U+9FFF
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/// CJK Compatibility Ideographs: U+F900..U+FAFF
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/// - All undesignated code points in Planes 2 and 3, whether inside or
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/// outside of allocated blocks, default to "W":
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/// Plane 2: U+20000..U+2FFFD
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/// Plane 3: U+30000..U+3FFFD
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///
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/// The table is similar to the table
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/// __extended_grapheme_custer_property_boundary::__entries
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/// which explains the details of these classes. The only difference is this
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/// table lacks a property, thus having more bits available for the size.
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///
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/// The maximum code point that has an estimated width of 2 is U+3FFFD. This
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/// value can be encoded in 18 bits. Thus the upper 3 bits of the code point
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/// are always 0. These 3 bits are used to enlarge the offset range. This
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/// optimization reduces the table in Unicode 15 from 184 to 104 entries,
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/// saving 320 bytes.
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///
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/// The data has 2 values:
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/// - bits [0, 13] The size of the range, allowing 16384 elements.
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/// - bits [14, 31] The lower bound code point of the range. The upper bound of
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/// the range is lower bound + size.
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_LIBCPP_HIDE_FROM_ABI inline constexpr uint32_t __entries[107] = {
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0x0440005f /* 00001100 - 0000115f [ 96] */, //
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0x08c68001 /* 0000231a - 0000231b [ 2] */, //
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0x08ca4001 /* 00002329 - 0000232a [ 2] */, //
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0x08fa4003 /* 000023e9 - 000023ec [ 4] */, //
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0x08fc0000 /* 000023f0 - 000023f0 [ 1] */, //
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0x08fcc000 /* 000023f3 - 000023f3 [ 1] */, //
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0x097f4001 /* 000025fd - 000025fe [ 2] */, //
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0x09850001 /* 00002614 - 00002615 [ 2] */, //
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0x0992000b /* 00002648 - 00002653 [ 12] */, //
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0x099fc000 /* 0000267f - 0000267f [ 1] */, //
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0x09a4c000 /* 00002693 - 00002693 [ 1] */, //
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0x09a84000 /* 000026a1 - 000026a1 [ 1] */, //
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0x09aa8001 /* 000026aa - 000026ab [ 2] */, //
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0x09af4001 /* 000026bd - 000026be [ 2] */, //
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0x09b10001 /* 000026c4 - 000026c5 [ 2] */, //
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0x09b38000 /* 000026ce - 000026ce [ 1] */, //
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0x09b50000 /* 000026d4 - 000026d4 [ 1] */, //
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0x09ba8000 /* 000026ea - 000026ea [ 1] */, //
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0x09bc8001 /* 000026f2 - 000026f3 [ 2] */, //
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0x09bd4000 /* 000026f5 - 000026f5 [ 1] */, //
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0x09be8000 /* 000026fa - 000026fa [ 1] */, //
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0x09bf4000 /* 000026fd - 000026fd [ 1] */, //
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0x09c14000 /* 00002705 - 00002705 [ 1] */, //
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0x09c28001 /* 0000270a - 0000270b [ 2] */, //
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0x09ca0000 /* 00002728 - 00002728 [ 1] */, //
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0x09d30000 /* 0000274c - 0000274c [ 1] */, //
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0x09d38000 /* 0000274e - 0000274e [ 1] */, //
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0x09d4c002 /* 00002753 - 00002755 [ 3] */, //
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0x09d5c000 /* 00002757 - 00002757 [ 1] */, //
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0x09e54002 /* 00002795 - 00002797 [ 3] */, //
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0x09ec0000 /* 000027b0 - 000027b0 [ 1] */, //
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0x09efc000 /* 000027bf - 000027bf [ 1] */, //
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0x0ac6c001 /* 00002b1b - 00002b1c [ 2] */, //
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0x0ad40000 /* 00002b50 - 00002b50 [ 1] */, //
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0x0ad54000 /* 00002b55 - 00002b55 [ 1] */, //
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0x0ba00019 /* 00002e80 - 00002e99 [ 26] */, //
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0x0ba6c058 /* 00002e9b - 00002ef3 [ 89] */, //
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0x0bc000d5 /* 00002f00 - 00002fd5 [ 214] */, //
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0x0bfc004e /* 00002ff0 - 0000303e [ 79] */, //
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0x0c104055 /* 00003041 - 00003096 [ 86] */, //
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0x0c264066 /* 00003099 - 000030ff [ 103] */, //
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0x0c41402a /* 00003105 - 0000312f [ 43] */, //
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0x0c4c405d /* 00003131 - 0000318e [ 94] */, //
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0x0c640053 /* 00003190 - 000031e3 [ 84] */, //
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0x0c7bc02f /* 000031ef - 0000321e [ 48] */, //
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0x0c880027 /* 00003220 - 00003247 [ 40] */, //
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0x0c943fff /* 00003250 - 0000724f [16384] */, //
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0x1c94323c /* 00007250 - 0000a48c [12861] */, //
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0x29240036 /* 0000a490 - 0000a4c6 [ 55] */, //
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0x2a58001c /* 0000a960 - 0000a97c [ 29] */, //
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0x2b002ba3 /* 0000ac00 - 0000d7a3 [11172] */, //
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0x3e4001ff /* 0000f900 - 0000faff [ 512] */, //
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0x3f840009 /* 0000fe10 - 0000fe19 [ 10] */, //
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0x3f8c0022 /* 0000fe30 - 0000fe52 [ 35] */, //
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0x3f950012 /* 0000fe54 - 0000fe66 [ 19] */, //
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0x3f9a0003 /* 0000fe68 - 0000fe6b [ 4] */, //
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0x3fc0405f /* 0000ff01 - 0000ff60 [ 96] */, //
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0x3ff80006 /* 0000ffe0 - 0000ffe6 [ 7] */, //
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0x5bf80004 /* 00016fe0 - 00016fe4 [ 5] */, //
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0x5bfc0001 /* 00016ff0 - 00016ff1 [ 2] */, //
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0x5c0017f7 /* 00017000 - 000187f7 [ 6136] */, //
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0x620004d5 /* 00018800 - 00018cd5 [ 1238] */, //
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0x63400008 /* 00018d00 - 00018d08 [ 9] */, //
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0x6bfc0003 /* 0001aff0 - 0001aff3 [ 4] */, //
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0x6bfd4006 /* 0001aff5 - 0001affb [ 7] */, //
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0x6bff4001 /* 0001affd - 0001affe [ 2] */, //
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0x6c000122 /* 0001b000 - 0001b122 [ 291] */, //
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0x6c4c8000 /* 0001b132 - 0001b132 [ 1] */, //
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0x6c540002 /* 0001b150 - 0001b152 [ 3] */, //
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0x6c554000 /* 0001b155 - 0001b155 [ 1] */, //
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0x6c590003 /* 0001b164 - 0001b167 [ 4] */, //
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0x6c5c018b /* 0001b170 - 0001b2fb [ 396] */, //
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0x7c010000 /* 0001f004 - 0001f004 [ 1] */, //
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0x7c33c000 /* 0001f0cf - 0001f0cf [ 1] */, //
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0x7c638000 /* 0001f18e - 0001f18e [ 1] */, //
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0x7c644009 /* 0001f191 - 0001f19a [ 10] */, //
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0x7c800002 /* 0001f200 - 0001f202 [ 3] */, //
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0x7c84002b /* 0001f210 - 0001f23b [ 44] */, //
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0x7c900008 /* 0001f240 - 0001f248 [ 9] */, //
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0x7c940001 /* 0001f250 - 0001f251 [ 2] */, //
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0x7c980005 /* 0001f260 - 0001f265 [ 6] */, //
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0x7cc0034f /* 0001f300 - 0001f64f [ 848] */, //
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0x7da00045 /* 0001f680 - 0001f6c5 [ 70] */, //
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0x7db30000 /* 0001f6cc - 0001f6cc [ 1] */, //
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0x7db40002 /* 0001f6d0 - 0001f6d2 [ 3] */, //
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0x7db54002 /* 0001f6d5 - 0001f6d7 [ 3] */, //
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0x7db70003 /* 0001f6dc - 0001f6df [ 4] */, //
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0x7dbac001 /* 0001f6eb - 0001f6ec [ 2] */, //
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0x7dbd0008 /* 0001f6f4 - 0001f6fc [ 9] */, //
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0x7df8000b /* 0001f7e0 - 0001f7eb [ 12] */, //
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0x7dfc0000 /* 0001f7f0 - 0001f7f0 [ 1] */, //
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0x7e4000ff /* 0001f900 - 0001f9ff [ 256] */, //
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0x7e9c000c /* 0001fa70 - 0001fa7c [ 13] */, //
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0x7ea00008 /* 0001fa80 - 0001fa88 [ 9] */, //
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0x7ea4002d /* 0001fa90 - 0001fabd [ 46] */, //
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0x7eafc006 /* 0001fabf - 0001fac5 [ 7] */, //
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0x7eb3800d /* 0001face - 0001fadb [ 14] */, //
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0x7eb80008 /* 0001fae0 - 0001fae8 [ 9] */, //
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0x7ebc0008 /* 0001faf0 - 0001faf8 [ 9] */, //
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0x80003fff /* 00020000 - 00023fff [16384] */, //
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0x90003fff /* 00024000 - 00027fff [16384] */, //
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0xa0003fff /* 00028000 - 0002bfff [16384] */, //
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0xb0003ffd /* 0002c000 - 0002fffd [16382] */, //
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0xc0003fff /* 00030000 - 00033fff [16384] */, //
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0xd0003fff /* 00034000 - 00037fff [16384] */, //
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0xe0003fff /* 00038000 - 0003bfff [16384] */, //
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0xf0003ffd /* 0003c000 - 0003fffd [16382] */};
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/// The upper bound entry of EastAsianWidth.txt.
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///
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/// Values greater than this value may have more than 18 significant bits.
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/// They always have a width of 1. This property makes it possible to store
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/// the table in its compact form.
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inline constexpr uint32_t __table_upper_bound = 0x0003fffd;
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/// Returns the estimated width of a Unicode code point.
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///
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/// \pre The code point is a valid Unicode code point.
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr int __estimated_width(const char32_t __code_point) noexcept {
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// Since __table_upper_bound contains the unshifted range do the
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// comparison without shifting.
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if (__code_point > __table_upper_bound) [[unlikely]]
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return 1;
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// When the code-point is less than the first element in the table
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// the lookup is quite expensive. Since quite some scripts are in
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// that range, it makes sense to validate that first.
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// The std_format_spec_string_unicode benchmark gives a measurable
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// improvement.
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if (__code_point < (__entries[0] >> 14))
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return 1;
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ptrdiff_t __i = std::ranges::upper_bound(__entries, (__code_point << 14) | 0x3fffu) - __entries;
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if (__i == 0)
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return 1;
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--__i;
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uint32_t __upper_bound = (__entries[__i] >> 14) + (__entries[__i] & 0x3fffu);
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return 1 + (__code_point <= __upper_bound);
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}
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} // namespace __width_estimation_table
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#endif //_LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FORMAT_WIDTH_ESTIMATION_TABLE_H
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