notepad-plus-plus/lexilla/lexlib/CharacterCategory.cxx

// Scintilla source code edit control
/** @file CharacterCategory.cxx
 ** Returns the Unicode general category of a character.
 ** Table automatically regenerated by scripts/GenerateCharacterCategory.py
 ** Should only be rarely regenerated for new versions of Unicode.
 **/
// Copyright 2013 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <vector>
#include <algorithm>
#include <iterator>

#include "CharacterCategory.h"

namespace Lexilla {

namespace {
	// Use an unnamed namespace to protect the declarations from name conflicts

const int catRanges[] = {
//++Autogenerated -- start of section automatically generated
// Created with Python 3.11.0,  Unicode 14.0.0
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2124292,
2125509,
2125693,
2125828,
2126813,
2126833,
2126852,
2128029,
2128132,
2128401,
2128425,
2128605,
2129920,
2131201,
2132484,
2135005,
2135048,
2135389,
2135552,
2136733,
2136833,
2138013,
2138116,
2139421,
2139652,
2141341,
2141681,
2141696,
2142077,
2142080,
2142589,
2142592,
2142845,
2142848,
2142941,
2142945,
2143325,
2143329,
2143837,
2143841,
2144093,
2144097,
2144189,
2146308,
2156285,
2156548,
2157277,
2157572,
2157853,
2158595,
2158813,
2158819,
2160189,
2160195,
2160509,
2162692,
2162909,
2162948,
2163005,
2163012,
2164445,
2164452,
2164541,
2164612,
2164669,
2164708,
2165469,
2165489,
2165514,
2165764,
2166517,
2166570,
2166788,
2167805,
2168042,
2168349,
2169860,
2170493,
2170500,
2170589,
2170730,
2170884,
2171594,
2171805,
2171889,
2171908,
2172765,
2172913,
2172957,
2174980,
2176797,
2176906,
2176964,
2177034,
2177565,
2177610,
2179076,
2179109,
2179229,
2179237,
2179325,
2179461,
2179588,
2179741,
2179748,
2179869,
2179876,
2180829,
2180869,
2180989,
2181093,
2181130,
2181437,
2181649,
2181949,
2182148,
2183082,
2183153,
2183172,
2184106,
2184221,
2185220,
2185493,
2185508,
2186405,
2186493,
2186602,
2186769,
2187005,
2187268,
2189021,
2189105,
2189316,
2190045,
2190090,
2190340,
2190973,
2191114,
2191364,
2191965,
2192177,
2192317,
2192682,
2192925,
2195460,
2197821,
2199552,
2201213,
2201601,
2203261,
2203466,
2203652,
2204805,
2204957,
2205192,
2205533,
2214922,
2215933,
2215940,
2217309,
2217317,
2217388,
2217437,
2217476,
2217565,
2220036,
2220970,
2221284,
2221341,
2221572,
2222277,
2222634,
2222769,
2222941,
2223620,
2224197,
2224337,
2224477,
2225668,
2226346,
2226589,
2227204,
2227965,
2228230,
2228261,
2228294,
2228324,
2230021,
2230513,
2230749,
2230858,
2231496,
2231813,
2231844,
2231909,
2231972,
2232029,
2232293,
2232390,
2232420,
2233862,
2233957,
2234086,
2234149,
2234225,
2234298,
2234321,
2234437,
2234493,
2234810,
2234845,
2234884,
2235709,
2235912,
2236253,
2236421,
2236516,
2237669,
2237830,
2237861,
2238141,
2238152,
2238481,
2238596,
2238630,
2238692,
2238749,
2238980,
2240101,
2240145,
2240196,
2240253,
2240517,
2240582,
2240612,
2242150,
2242245,
2242534,
2242596,
2242737,
2242853,
2242993,
2243014,
2243045,
2243080,
2243396,
2243441,
2243460,
2243505,
2243613,
2243626,
2244285,
2244612,
2245213,
2245220,
2246022,
2246117,
2246214,
2246277,
2246310,
2246341,
2246417,
2246597,
2246653,
2248708,
2248957,
2248964,
2249021,
2249028,
2249181,
2249188,
2249693,
2249700,
2250033,
2250077,
2250244,
2251749,
2251782,
2251877,
2252157,
2252296,
2252637,
2252805,
2252870,
2252957,
2252964,
2253245,
2253284,
2253373,
2253412,
2254141,
2254148,
2254397,
2254404,
2254493,
2254500,
2254685,
2254693,
2254756,
2254790,
2254853,
2254886,
2255037,
2255078,
2255165,
2255206,
2255325,
2255364,
2255421,
2255590,
2255645,
2255780,
2255942,
2256029,
2256069,
2256317,
2256389,
2256573,
2260996,
2262694,
2262789,
2263046,
2263109,
2263206,
2263237,
2263268,
2263409,
2263560,
2263889,
2263965,
2263985,
2264005,
2264036,
2264157,
2265092,
2266630,
2266725,
2266918,
2266949,
2266982,
2267109,
2267174,
2267205,
2267268,
2267345,
2267364,
2267421,
2267656,
2267997,
2273284,
2274790,
2274885,
2275037,
2275078,
2275205,
2275270,
2275301,
2275377,
2276100,
2276229,
2276317,
2277380,
2278918,
2279013,
2279270,
2279333,
2279366,
2279397,
2279473,
2279556,
2279613,
2279944,
2280285,
2280465,
2280893,
2281476,
2282853,
2282886,
2282917,
2282950,
2283013,
2283206,
2283237,
2283268,
2283313,
2283357,
2283528,
2283869,
2285572,
2286461,
2286501,
2286598,
2286661,
2286790,
2286821,
2287005,
2287112,
2287434,
2287505,
2287605,
2287620,
2287869,
2293764,
2295174,
2295269,
2295558,
2295589,
2295665,
2295709,
2298880,
2299905,
2300936,
2301258,
2301565,
2301924,
2302205,
2302244,
2302301,
2302340,
2302621,
2302628,
2302717,
2302724,
2303494,
2303709,
2303718,
2303805,
2303845,
2303910,
2303941,
2303972,
2304006,
2304036,
2304070,
2304101,
2304145,
2304253,
2304520,
2304861,
2307076,
2307357,
2307396,
2308646,
2308741,
2308893,
2308933,
2308998,
2309125,
2309156,
2309201,
2309220,
2309254,
2309309,
2310148,
2310181,
2310500,
2311781,
2311974,
2312004,
2312037,
2312177,
2312421,
2312477,
2312708,
2312741,
2312934,
2312997,
2313092,
2314565,
2314982,
2315013,
2315089,
2315172,
2315217,
2315389,
2315780,
2318141,
2326532,
2326845,
2326852,
2328038,
2328069,
2328317,
2328325,
2328518,
2328549,
2328580,
2328625,
2328797,
2329096,
2329418,
2330045,
2330129,
2330180,
2331165,
2331205,
2331933,
2331942,
2331973,
2332198,
2332229,
2332294,
2332325,
2332413,
2334724,
2334973,
2334980,
2335069,
2335076,
2336293,
2336509,
2336581,
2336637,
2336645,
2336733,
2336741,
2336964,
2336997,
2337053,
2337288,
2337629,
2337796,
2338013,
2338020,
2338109,
2338116,
2339142,
2339325,
2339333,
2339421,
2339430,
2339493,
2339526,
2339557,
2339588,
2339645,
2339848,
2340189,
2350084,
2350693,
2350758,
2350833,
2350909,
2356740,
2356797,
2357258,
2357941,
2358195,
2358325,
2358877,
2359281,
2359300,
2388829,
2392073,
2395645,
2395665,
2395837,
2396164,
2402461,
2486788,
2489905,
2489981,
2490372,
2524669,
2524698,
2524989,
2654212,
2672893,
2949124,
2967357,
2967556,
2968573,
2968584,
2968925,
2969041,
2969092,
2971645,
2971656,
2971997,
2972164,
2973149,
2973189,
2973361,
2973405,
2973700,
2975237,
2975473,
2975637,
2975747,
2975889,
2975925,
2975965,
2976264,
2976605,
2976618,
2976861,
2976868,
2977565,
2977700,
2978333,
3000320,
3001345,
3002378,
3003121,
3003261,
3006468,
3008893,
3008997,
3009028,
3009062,
3010845,
3011045,
3011171,
3011613,
3013635,
3013713,
3013731,
3013765,
3013821,
3014150,
3014237,
3014660,
3211037,
3211268,
3250909,
3252228,
3252541,
3538435,
3538589,
3538595,
3538845,
3538851,
3538941,
3538948,
3548285,
3549700,
3549821,
3550340,
3550493,
3550724,
3563421,
3637252,
3640701,
3640836,
3641277,
3641348,
3641661,
3641860,
3642205,
3642261,
3642277,
3642353,
3642394,
3642525,
3792901,
3794397,
3794437,
3795197,
3795477,
3799197,
3801109,
3808989,
3809301,
3810557,
3810613,
3812518,
3812581,
3812693,
3812774,
3812986,
3813221,
3813493,
3813541,
3813781,
3814725,
3814869,
3816829,
3817493,
3819589,
3819701,
3819741,
3824650,
3825309,
3825685,
3828477,
3828746,
3829565,
3833856,
3834689,
3835520,
3836353,
3836605,
3836609,
3837184,
3838017,
3838848,
3838909,
3838912,
3839005,
3839040,
3839101,
3839136,
3839229,
3839264,
3839421,
3839424,
3839681,
3839837,
3839841,
3839901,
3839905,
3840157,
3840161,
3840512,
3841345,
3842176,
3842269,
3842272,
3842429,
3842464,
3842749,
3842752,
3843005,
3843009,
3843840,
3843933,
3843936,
3844093,
3844096,
3844285,
3844288,
3844349,
3844416,
3844669,
3844673,
3845504,
3846337,
3847168,
3848001,
3848832,
3849665,
3850496,
3851329,
3852160,
3852993,
3853824,
3854657,
3855581,
3855616,
3856434,
3856449,
3857266,
3857281,
3857472,
3858290,
3858305,
3859122,
3859137,
3859328,
3860146,
3860161,
3860978,
3860993,
3861184,
3862002,
3862017,
3862834,
3862849,
3863040,
3863858,
3863873,
3864690,
3864705,
3864896,
3864929,
3864989,
3865032,
3866645,
3883013,
3884789,
3884901,
3886517,
3886757,
3886805,
3887237,
3887285,
3887345,
3887517,
3887973,
3888157,
3888165,
3888669,
3923969,
3924292,
3924321,
3924989,
3932165,
3932413,
3932421,
3932989,
3933029,
3933277,
3933285,
3933373,
3933381,
3933565,
3940356,
3941821,
3941893,
3942115,
3942365,
3942408,
3942749,
3942852,
3942901,
3942941,
3953156,
3954117,
3954173,
3954692,
3956101,
3956232,
3956573,
3956723,
3956765,
3996676,
3996925,
3996932,
3997085,
3997092,
3997181,
3997188,
3997693,
3997700,
4004029,
4004074,
4004357,
4004605,
4005888,
4006977,
4008069,
4008291,
4008349,
4008456,
4008797,
4008913,
4008989,
4034090,
4035989,
4036010,
4036115,
4036138,
4036285,
4038698,
4040149,
4040170,
4040669,
4046852,
4047005,
4047012,
4047901,
4047908,
4047997,
4048004,
4048061,
4048100,
4048157,
4048164,
4048509,
4048516,
4048669,
4048676,
4048733,
4048740,
4048797,
4048964,
4049021,
4049124,
4049181,
4049188,
4049245,
4049252,
4049309,
4049316,
4049437,
4049444,
4049533,
4049540,
4049597,
4049636,
4049693,
4049700,
4049757,
4049764,
4049821,
4049828,
4049885,
4049892,
4049949,
4049956,
4050045,
4050052,
4050109,
4050148,
4050301,
4050308,
4050557,
4050564,
4050717,
4050724,
4050877,
4050884,
4050941,
4050948,
4051293,
4051300,
4051869,
4052004,
4052125,
4052132,
4052317,
4052324,
4052893,
4054546,
4054621,
4063253,
4064669,
4064789,
4067997,
4068373,
4068861,
4068917,
4069405,
4069429,
4069917,
4069941,
4071133,
4071434,
4071861,
4077021,
4078805,
4079741,
4080149,
4081565,
4081685,
4081981,
4082197,
4082269,
4082709,
4082909,
4087829,
4095860,
4096021,
4119325,
4119477,
4119997,
4120085,
4120509,
4120597,
4124317,
4124693,
4127549,
4127765,
4128157,
4128277,
4128317,
4128789,
4129181,
4129301,
4131101,
4131349,
4131677,
4131861,
4133149,
4133397,
4134365,
4134421,
4134493,
4136981,
4147869,
4148245,
4148701,
4148757,
4148925,
4149013,
4149181,
4149269,
4149501,
4149781,
4150717,
4150805,
4151165,
4151317,
4151517,
4151829,
4152157,
4152341,
4152605,
4152853,
4153085,
4153365,
4158077,
4158101,
4159869,
4161032,
4161373,
4194308,
5561373,
5562372,
5695293,
5695492,
5702621,
5702660,
5887069,
5887492,
6126653,
6225924,
6243293,
6291460,
6449533,
29360186,
29360221,
29361178,
29364253,
29368325,
29376029,
31457308,
33554397,
33554460,
35651549,
35651613,
//--Autogenerated -- end of section automatically generated
};

constexpr int maxUnicode = 0x10ffff;
constexpr int maskCategory = 0x1F;

}

// Each element in catRanges is the start of a range of Unicode characters in
// one general category.
// The value is comprised of a 21-bit character value shifted 5 bits and a 5 bit
// category matching the CharacterCategory enumeration.
// Initial version has 3249 entries and adds about 13K to the executable.
// The array is in ascending order so can be searched using binary search.
// Therefore the average call takes log2(3249) = 12 comparisons.
// For speed, it may be useful to make a linear table for the common values,
// possibly for 0..0xff for most Western European text or 0..0xfff for most
// alphabetic languages.

CharacterCategory CategoriseCharacter(int character) {
	if (character < 0 || character > maxUnicode)
		return ccCn;
	const int baseValue = character * (maskCategory+1) + maskCategory;
	const int *placeAfter = std::lower_bound(catRanges, std::end(catRanges), baseValue);
	return static_cast<CharacterCategory>(*(placeAfter-1) & maskCategory);
}

// Implementation of character sets recommended for identifiers in Unicode Standard Annex #31.
// http://unicode.org/reports/tr31/

namespace {

enum class OtherID { oidNone, oidStart, oidContinue };

// Some characters are treated as valid for identifiers even
// though most characters from their category are not.
// Values copied from http://www.unicode.org/Public/9.0.0/ucd/PropList.txt
OtherID OtherIDOfCharacter(int character) noexcept {
	if (
		(character == 0x1885) ||	// MONGOLIAN LETTER ALI GALI BALUDA
		(character == 0x1886) ||	// MONGOLIAN LETTER ALI GALI THREE BALUDA
		(character == 0x2118) ||	// SCRIPT CAPITAL P
		(character == 0x212E) ||	// ESTIMATED SYMBOL
		(character == 0x309B) ||	// KATAKANA-HIRAGANA VOICED SOUND MARK
		(character == 0x309C)) {	// KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
		return OtherID::oidStart;
	} else if (
		(character == 0x00B7) ||	// MIDDLE DOT
		(character == 0x0387) ||	// GREEK ANO TELEIA
		((character >= 0x1369) && (character <= 0x1371)) ||	// ETHIOPIC DIGIT ONE..ETHIOPIC DIGIT NINE
		(character == 0x19DA)) {	// NEW TAI LUE THAM DIGIT ONE
		return OtherID::oidContinue;
	} else {
		return OtherID::oidNone;
	}
}

// Determine if a character is in  Ll|Lu|Lt|Lm|Lo|Nl|Mn|Mc|Nd|Pc and has
// Pattern_Syntax|Pattern_White_Space.
// As of Unicode 9, only VERTICAL TILDE which is in Lm and has Pattern_Syntax matches.
// Should really generate from PropList.txt a list of Pattern_Syntax and Pattern_White_Space.
constexpr bool IsIdPattern(int character) noexcept {
	return character == 0x2E2F;
}

bool OmitXidStart(int character) noexcept {
	switch (character) {
	case 0x037A:	// GREEK YPOGEGRAMMENI
	case 0x0E33:	// THAI CHARACTER SARA AM
	case 0x0EB3:	// LAO VOWEL SIGN AM
	case 0x309B:	// KATAKANA-HIRAGANA VOICED SOUND MARK
	case 0x309C:	// KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
	case 0xFC5E:	// ARABIC LIGATURE SHADDA WITH DAMMATAN ISOLATED FORM
	case 0xFC5F:	// ARABIC LIGATURE SHADDA WITH KASRATAN ISOLATED FORM
	case 0xFC60:	// ARABIC LIGATURE SHADDA WITH FATHA ISOLATED FORM
	case 0xFC61:	// ARABIC LIGATURE SHADDA WITH DAMMA ISOLATED FORM
	case 0xFC62:	// ARABIC LIGATURE SHADDA WITH KASRA ISOLATED FORM
	case 0xFC63:	// ARABIC LIGATURE SHADDA WITH SUPERSCRIPT ALEF ISOLATED FORM
	case 0xFDFA:	// ARABIC LIGATURE SALLALLAHOU ALAYHE WASALLAM
	case 0xFDFB:	// ARABIC LIGATURE JALLAJALALOUHOU
	case 0xFE70:	// ARABIC FATHATAN ISOLATED FORM
	case 0xFE72:	// ARABIC DAMMATAN ISOLATED FORM
	case 0xFE74:	// ARABIC KASRATAN ISOLATED FORM
	case 0xFE76:	// ARABIC FATHA ISOLATED FORM
	case 0xFE78:	// ARABIC DAMMA ISOLATED FORM
	case 0xFE7A:	// ARABIC KASRA ISOLATED FORM
	case 0xFE7C:	// ARABIC SHADDA ISOLATED FORM
	case 0xFE7E:	// ARABIC SUKUN ISOLATED FORM
	case 0xFF9E:	// HALFWIDTH KATAKANA VOICED SOUND MARK
	case 0xFF9F:	// HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK
		return true;
	default:
		return false;
	}
}

bool OmitXidContinue(int character) noexcept {
	switch (character) {
	case 0x037A:	// GREEK YPOGEGRAMMENI
	case 0x309B:	// KATAKANA-HIRAGANA VOICED SOUND MARK
	case 0x309C:	// KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
	case 0xFC5E:	// ARABIC LIGATURE SHADDA WITH DAMMATAN ISOLATED FORM
	case 0xFC5F:	// ARABIC LIGATURE SHADDA WITH KASRATAN ISOLATED FORM
	case 0xFC60:	// ARABIC LIGATURE SHADDA WITH FATHA ISOLATED FORM
	case 0xFC61:	// ARABIC LIGATURE SHADDA WITH DAMMA ISOLATED FORM
	case 0xFC62:	// ARABIC LIGATURE SHADDA WITH KASRA ISOLATED FORM
	case 0xFC63:	// ARABIC LIGATURE SHADDA WITH SUPERSCRIPT ALEF ISOLATED FORM
	case 0xFDFA:	// ARABIC LIGATURE SALLALLAHOU ALAYHE WASALLAM
	case 0xFDFB:	// ARABIC LIGATURE JALLAJALALOUHOU
	case 0xFE70:	// ARABIC FATHATAN ISOLATED FORM
	case 0xFE72:	// ARABIC DAMMATAN ISOLATED FORM
	case 0xFE74:	// ARABIC KASRATAN ISOLATED FORM
	case 0xFE76:	// ARABIC FATHA ISOLATED FORM
	case 0xFE78:	// ARABIC DAMMA ISOLATED FORM
	case 0xFE7A:	// ARABIC KASRA ISOLATED FORM
	case 0xFE7C:	// ARABIC SHADDA ISOLATED FORM
	case 0xFE7E:	// ARABIC SUKUN ISOLATED FORM
		return true;
	default:
		return false;
	}
}

}

// UAX #31 defines ID_Start as
// [[:L:][:Nl:][:Other_ID_Start:]--[:Pattern_Syntax:]--[:Pattern_White_Space:]]
bool IsIdStart(int character) {
	if (IsIdPattern(character)) {
		return false;
	}
	const OtherID oid = OtherIDOfCharacter(character);
	if (oid == OtherID::oidStart) {
		return true;
	}
	const CharacterCategory c = CategoriseCharacter(character);
	return (c == ccLl || c == ccLu || c == ccLt || c == ccLm || c == ccLo
		|| c == ccNl);
}

// UAX #31 defines ID_Continue as
// [[:ID_Start:][:Mn:][:Mc:][:Nd:][:Pc:][:Other_ID_Continue:]--[:Pattern_Syntax:]--[:Pattern_White_Space:]]
bool IsIdContinue(int character) {
	if (IsIdPattern(character)) {
		return false;
	}
	const OtherID oid = OtherIDOfCharacter(character);
	if (oid != OtherID::oidNone) {
		return true;
	}
	const CharacterCategory c = CategoriseCharacter(character);
	return (c == ccLl || c == ccLu || c == ccLt || c == ccLm || c == ccLo
		|| c == ccNl || c == ccMn || c == ccMc || c == ccNd || c == ccPc);
}

// XID_Start is ID_Start modified for Normalization Form KC in UAX #31
bool IsXidStart(int character) {
	if (OmitXidStart(character)) {
		return false;
	} else {
		return IsIdStart(character);
	}
}

// XID_Continue is ID_Continue modified for Normalization Form KC in UAX #31
bool IsXidContinue(int character) {
	if (OmitXidContinue(character)) {
		return false;
	} else {
		return IsIdContinue(character);
	}
}

CharacterCategoryMap::CharacterCategoryMap() {
	Optimize(256);
}

int CharacterCategoryMap::Size() const noexcept {
	return static_cast<int>(dense.size());
}

void CharacterCategoryMap::Optimize(int countCharacters) {
	const int characters = std::clamp(countCharacters, 256, maxUnicode + 1);
	dense.resize(characters);

	int end = 0;
	int index = 0;
	int current = catRanges[index];
	++index;
	do {
		const int next = catRanges[index];
		const unsigned char category = current & maskCategory;
		current >>= 5;
		end = std::min(characters, next >> 5);
		while (current < end) {
			dense[current++] = category;
		}
		current = next;
		++index;
	} while (characters > end);
}

}