Module:Unicode data

local p = {}

local floor = math.floor

local function errorf(level, ...) if type(level) == number then return error(string.format(...), level + 1) else -- level is actually the format string. return error(string.format(level, ...), 2) end end

-- For the algorithm used to generate Hangul Syllable names, -- see "Hangul Syllable Name Generation" in section 3.12 of the -- Unicode Specification: -- https://www.unicode.org/versions/Unicode11.0.0/ch03.pdf local Hangul_data -- loaded if needed

local name_hooks = { {    0x00,     0x1F, "" }, -- C0 control characters {    0x7F,     0x9F, "" }, -- DEL and C1 control characters {  0x3400,   0x4DB5, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension A	{   0x4E00,   0x9FEF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph {  0xAC00,   0xD7A3, function (codepoint) -- Hangul Syllables Hangul_data = Hangul_data or mw.loadData("Module:Unicode data/Hangul") local syllable_index = codepoint - 0xAC00

return ("HANGUL SYLLABLE %s%s%s"):format(			Hangul_data.leads[floor(syllable_index / Hangul_data.final_count)],			Hangul_data.vowels[floor((syllable_index % Hangul_data.final_count) / Hangul_data.trail_count)],			Hangul_data.trails[syllable_index % Hangul_data.trail_count]		) end }, -- High Surrogates, High Private Use Surrogates, Low Surrogates {  0xD800,   0xDFFF, "" }, {  0xE000,   0xF8FF, "" }, -- Private Use {  0xF900,   0xFA6D, "CJK COMPATIBILITY IDEOGRAPH-%04X" }, -- CJK Compatibility Ideographs {  0xFA70,   0xFAD9, "CJK COMPATIBILITY IDEOGRAPH-%04X" }, { 0x17000,  0x187F1, "TANGUT IDEOGRAPH-%04X" }, -- Tangut { 0x18800,  0x18AF2, function (codepoint) return ("TANGUT COMPONENT-%03d"):format(codepoint - 0x187FF) end }, { 0x1B170,  0x1B2FB, "NUSHU CHARACTER-%04X" }, -- Nushu { 0x20000,  0x2A6D6, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension B	{  0x2A700,  0x2B734, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension C	{  0x2A740,  0x2B81D, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension D	{  0x2B820,  0x2CEA1, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension E	{  0x2CEB0,  0x2EBE0, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension F	-- CJK Compatibility Ideographs Supplement (Supplementary Ideographic Plane) { 0x2F800,  0x2FA1D, "CJK COMPATIBILITY IDEOGRAPH-%04X" }, { 0xE0100,  0xE01EF, function (codepoint) -- Variation Selectors Supplement return ("VARIATION SELECTOR-%d"):format(codepoint - 0xE0100 + 17) end}, { 0xF0000,  0xFFFFD, "" }, -- Plane 15 Private Use { 0x100000, 0x10FFFD, "" } -- Plane 16 Private Use } name_hooks.length = #name_hooks

local function binary_range_search(codepoint, ranges) local low, mid, high low, high = 1, ranges.length or require "Module:Table".length(ranges) while low <= high do		mid = floor((low + high) / 2) local range = ranges[mid] if codepoint < range[1] then high = mid - 1 elseif codepoint <= range[2] then return range, mid else low = mid + 1 end end return nil, mid end

local function linear_range_search(codepoint, ranges) for i, range in ipairs(ranges) do		if range[1] <= codepoint and codepoint <= range[2] then return range end end end

local name_range_cache

local function generate_name(data, codepoint) if type(data) == "string" then return data:format(codepoint) else return data(codepoint) end end

-- https://www.unicode.org/versions/Unicode11.0.0/ch04.pdf, section 4.8 function p.lookup_name(codepoint) require 'libraryUtil'.checkType('lookup_name', 1, codepoint, 'number') if codepoint < 0 or 0x10FFFF < codepoint then errorf("Codepoint %04X out of range", codepoint) end -- U+FDD0-U+FDEF and all codepoints ending in FFFE or FFFF are Unassigned -- (Cn) and specifically noncharacters: -- https://www.unicode.org/faq/private_use.html#nonchar4 if 0xFDD0 <= codepoint and (codepoint <= 0xFDEF			or floor(codepoint % 0x10000) >= 0xFFFE) then return (""):format(codepoint) end

if name_range_cache -- Check if previously used "name hook" applies to this codepoint. and codepoint >= name_range_cache[1] and codepoint <= name_range_cache[2] then return generate_name(name_range_cache[3], codepoint) end local range = binary_range_search(codepoint, name_hooks) if range then name_range_cache = range return generate_name(range[3], codepoint) end

local success, data = pcall(mw.loadData,		('Module:Unicode data/names/%03X'):format(codepoint / 0x1000)) if success and data[codepoint] then return data[codepoint] -- Unassigned (Cn) consists of noncharacters and reserved characters. -- The character has been established not to be a noncharacter, -- and if it were assigned, its name would already been retrieved, -- so it must be reserved. else return (""):format(codepoint) end end

function p.lookup_image(codepoint) local success, data = pcall(mw.loadData,		('Module:Unicode data/images/%03X'):format(codepoint / 0x1000)	) if success then return data[codepoint] end end

function p.template_lookup_name(frame) local param = frame.args[1] or frame:getParent.args[1] local codepoint = tonumber(param, 16) if not codepoint then errorf("Expected a codepoint in hexadecimal base, got '%s'", param) end local name = p.lookup_name(codepoint):gsub("<", "&lt;") return name end

local planes = { [ 0] = "Basic Multilingual Plane"; [ 1] = "Supplementary Multilingual Plane"; [ 2] = "Supplementary Ideographic Plane"; [13] = "Supplementary Special-purpose Plane"; [14] = "Supplementary Private Use Area-A"; [15] = "Supplementary Private Use Area-B"; }

-- Load Module:Unicode data/blocks if needed and assign it to this variable. local blocks

local function block_iter(blocks, i)	i = i + 1 local data = blocks[i] if data then return i, unpack(data) end end

-- An ipairs-type iterator generator for the list of blocks. function p.enum_blocks blocks = blocks or mw.loadData("Module:Unicode data/blocks") return block_iter, blocks, 0 end

function p.lookup_plane(codepoint) local i = floor(codepoint / 0x10000) return planes[i] or ("Plane %u"):format(i) end

function p.lookup_block(codepoint) blocks = blocks or mw.loadData("Module:Unicode data/blocks") local range = binary_range_search(codepoint, blocks) if range then return range[3] else return "No Block" end end

function p.get_block_range(name) local range blocks = blocks or mw.loadData("Module:Unicode data/blocks") for i, block in ipairs(blocks) do		if block[3] == name then range = block end end if range then return range[1], range[2] end end

function p.is_valid_pagename(pagename) local has_nonws = false

for cp in mw.ustring.gcodepoint(pagename) do		if (cp == 0x0023) -- # or (cp == 0x005B) -- [ or (cp == 0x005D) -- ] or (cp == 0x007B) -- { or (cp == 0x007C) -- | or (cp == 0x007D) -- } or (cp == 0x180E) -- MONGOLIAN VOWEL SEPARATOR or ((cp >= 0x2000) and (cp <= 0x200A)) -- spaces in General Punctuation block or (cp == 0xFFFD) -- REPLACEMENT CHARACTER then return false end

local printable, result = p.is_printable(cp) if not printable then return false end

if result ~= "space-separator" then has_nonws = true end end

return has_nonws end

local function manual_unpack(what, from) local result = {} from = from or 1 for i, item in ipairs(what) do		if i >= from then table.insert(result, item) end end return unpack(result) end

-- Creates a function to look up data in a module that contains "singles" (a -- codepoint-to-data map) and "ranges" (an array containing arrays that contain -- the low and high codepoints of a range and the data associated with that -- range). -- "loader" loads and returns the "singles" and "ranges" tables. -- "match_func" is passed the codepoint and either the data or the "dots", and -- generates the final result of the function. -- The varargs ("dots") describes the default data to be returned if there wasn't -- a match. -- In case the function is used more than once, "cache" saves ranges that have -- already been found to match, or a range whose data is the default if there -- was no match. local function memo_lookup(loader, match_func, ...) local dots = { ... }	local cache = {} local singles, ranges

return function (codepoint) if not singles then singles, ranges = loader end

if singles[codepoint] then return match_func(codepoint, singles[codepoint]) end

local lastlast = -1 local range = linear_range_search(codepoint, cache) if range then return match_func(codepoint, unpack(range, 3)) end local range, index = binary_range_search(codepoint, ranges) if range then table.insert(cache, { manual_unpack(range) }) return match_func(codepoint, manual_unpack(range, 3)) end if ranges[index] then local dots_range if codepoint > ranges[index][2] then dots_range = { ranges[index][2] + 1, ranges[index + 1] and ranges[index + 1][1] - 1 or 0x10FFFF, unpack(dots) }			else -- codepoint < range[index][1] dots_range = { ranges[index - 1] and ranges[index - 1][2] + 1 or 0, ranges[index][1] - 1, unpack(dots) }			end table.insert(cache, dots_range) end return match_func(codepoint) end end

-- Get a codepoint's combining class value in Module:Unicode data/combining, -- and return whether this value is not zero. Zero is assigned as the default -- if the combining class value is not found in this data module. -- That is, return true if character is combining, or false if it is not. -- See http://www.unicode.org/reports/tr44/#Canonical_Combining_Class_Values for -- more information. p.is_combining = memo_lookup(function 	local m_comb = mw.loadData('Module:Unicode data/combining')	return m_comb.single, m_comb.ranges end, function (codepoint, combining_class)	return combining_class and combining_class ~= 0		or false end, 0)

function p.add_dotted_circle(str) return (mw.ustring.gsub(str, ".", function(char) if p.is_combining(mw.ustring.codepoint(char)) then return '◌' .. char end end)) end

local lookup_control = memo_lookup(function 	local m_cc = mw.loadData('Module:Unicode data/control')	return m_cc.single, m_cc.ranges end, function (codepoint, ccc)	return ccc or "assigned" end, "assigned")

function p.is_assigned(codepoint) return lookup_control(codepoint) ~= "unassigned" end

function p.is_printable(codepoint) local result = lookup_control(codepoint) return (result == "assigned") or (result == "space-separator"), result end

function p.is_whitespace(codepoint) local result = lookup_control(codepoint) return (result == "space-separator"), result end

p.lookup_category = memo_lookup(	function 		local category_data = mw.loadData "Module:Unicode data/category"		return category_data.individual, category_data.ranges	end,	function (codepoint, category)		return category	end,	"Cn")

local script_range_cache local script_data local function lookup_script(codepoint) script_data = script_data or mw.loadData("Module:Unicode data/scripts") if script_data.individual[codepoint] then return script_data.individual[codepoint] end if script_range_cache then local range = linear_range_search(codepoint, script_range_cache) if range then return range[3] end end local range = binary_range_search(codepoint, script_data.ranges) if range then script_range_cache = script_range_cache or {} table.insert(script_range_cache, range) return range[3] end return "Zzzz" end p.lookup_script = lookup_script

function p.get_best_script(str) local scripts = {} for codepoint in mw.ustring.gcodepoint(str) do		local script = lookup_script(codepoint) -- Ignore "Inherited", "Undetermined", or "Uncoded" scripts. if not (script == "Zinh" or script == "Zyyy" or script == "Zzzz") then scripts[script] = true end end -- If scripts does not contain two or more keys, -- return first and only key (script code) in table. if not next(scripts, next(scripts)) then return next(scripts) end -- else return majority script, or else "Zzzz"? end

return p