Module:Unicode data

local export = {}

local floor = math.floor

local function errorf(first_arg, ...) if type(first_arg) == "number" then return error(string.format(...), first_arg + 1) else return error(string.format(first_arg, ...), 2) end end

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 export.binary_range_search = binary_range_search

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

-- Load a module by indexing "loader" with the name of the module minus the -- "Module:Unicode data/" part. For instance, loader.blocks returns -- Module:Unicode data/blocks. If a module cannot be loaded, false will be -- returned. local loader = setmetatable({}, {	__index = function (self, key)		local success, data = pcall(mw.loadData, "Module:Unicode data/" .. key)		if not success then			data = false		end		self[key] = data		return data	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/latest/ch03.pdf -- For most of the name rules given here, see the subsection -- "Unicode Name Property" in section 4.8 (Name) and the table 4-8 -- (Name Derivation Rule Prefix Strings): -- https://www.unicode.org/versions/latest/ch04.pdf local name_hooks = { {    0x00,     0x1F, "" }, -- C0 control characters {    0x7F,     0x9F, "" }, -- DEL and C1 control characters {  0x3400,   0x4DBF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension A	{   0x4E00,   0x9FFC, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph {  0xAC00,   0xD7A3, function (codepoint) -- Hangul Syllables local Hangul_data = loader.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 -- CJK Compatibility Ideographs {  0xF900,   0xFA6D, "CJK COMPATIBILITY IDEOGRAPH-%04X" }, {  0xFA70,   0xFAD9, "CJK COMPATIBILITY IDEOGRAPH-%04X" }, { 0x17000,  0x187F7, "TANGUT IDEOGRAPH-%04X" }, -- Tangut { 0x18800,  0x18AFF, function (codepoint) return ("TANGUT COMPONENT-%03d"):format(codepoint - 0x187FF) end }, { 0x18D00,  0x18D08, "TANGUT IDEOGRAPH-%04X" }, -- Tangut { 0x18B00,  0x18CD5, "KHITAN SMALL SCRIPT CHARACTER-%04X" }, { 0x1B170,  0x1B2FB, "NUSHU CHARACTER-%04X" }, -- Nushu { 0x20000,  0x2A6DD, "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" }, { 0x30000,  0x3134A, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension G	{  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 name_range_cache

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

-- -- Checks that the code point is a number and in range. -- Does not check whether code point is an integer. -- Not used local function check_codepoint(funcName, argIdx, val)	require 'libraryUtil'.checkType(funcName, argIdx, val, 'number')	if codepoint < 0 or 0x10FFFF < codepoint then		errorf("Codepoint %04X out of range", codepoint)	end end --

-- https://www.unicode.org/versions/latest/ch04.pdf, section 4.8 function export.lookup_name(codepoint) -- U+FDD0-U+FDEF and all code points 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 code point. 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 data = loader[('names/%03X'):format(codepoint / 0x1000)] if data 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 export.lookup_image(codepoint) local data = loader[('images/%03X'):format(codepoint / 0x1000)] if data then return data[codepoint] end end

local planes = { [ 0] = "Basic Multilingual Plane"; [ 1] = "Supplementary Multilingual Plane"; [ 2] = "Supplementary Ideographic Plane"; [ 3] = "Tertiary Ideographic Plane"; [14] = "Supplementary Special-purpose Plane"; [15] = "Supplementary Private Use Area-A"; [16] = "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 -- Unpack doesn't work on tables loaded with mw.loadData. return i, data[3], data[1], data[2] end end

-- An ipairs-type iterator generator for the list of blocks. function export.enum_blocks local blocks = loader.blocks return block_iter, blocks, 0 end

function export.get_block_range(name) local range for i, block in ipairs(loader.blocks) do		if block[3] == name then range = block end end if range then return range[1], range[2] end end

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

function export.lookup_block(codepoint) local blocks = loader.blocks local range = binary_range_search(codepoint, blocks) if range then return range[3] else return "No Block" end end

function export.get_block_info(name) for i, block in ipairs(loader.blocks) do		if block[3] == name then return block end end end

function export.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 = export.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) if what[from + 1] == nil then return what[from] end 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

local function compare_ranges(range1, range2) return range1[1] < range2[1] end

-- Creates a function to look up data in a module that contains "singles" (a -- code point-to-data map) and "ranges" (an array containing arrays that contain -- the low and high code points of a range and the data associated with that -- range). -- "loader" loads and returns the "singles" and "ranges" tables. -- "match_func" is passed the code point 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(data_module_subpage, match_func, ...) local dots = { ... }	local cache = {} local singles, ranges

return function (codepoint) if not singles then local data_module = loader[data_module_subpage] singles, ranges = data_module.singles, data_module.ranges end

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

local range = binary_range_search(codepoint, cache) if range then return match_func(codepoint, manual_unpack(range, 3)) end local range, index = binary_range_search(codepoint, ranges) if range then table.insert(cache, range) table.sort(cache, compare_ranges) 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.sort(cache, compare_ranges) end return match_func(codepoint, unpack(dots)) end end

-- Get a code point'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 https://www.unicode.org/reports/tr44/#Canonical_Combining_Class_Values for -- more information. export.is_combining = memo_lookup(	"combining",	function (codepoint, combining_class)		return combining_class and combining_class ~= 0 or false	end,	0)

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

local lookup_control = memo_lookup(	"control",	function (codepoint, ccc)		return ccc or "assigned"	end,	"assigned") export.lookup_control = lookup_control

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

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

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

export.lookup_category = memo_lookup(	"category",	function (codepoint, category)		return category	end,	"Cn")

export.lookup_script = memo_lookup(	"scripts",	function (codepoint, script)		return script	end,	"Zzzz")

local unsupported_title = { [0x0020] = "Unsupported titles/Space"; [0x0023] = "Unsupported titles/Number sign"; [0x002E] = "Unsupported titles/Full stop"; [0x003A] = "Unsupported titles/Colon"; [0x003C] = "Unsupported titles/Less than"; [0x003E] = "Unsupported titles/Greater than"; [0x005B] = "Unsupported titles/Left square bracket"; [0x005D] = "Unsupported titles/Right square bracket"; [0x005F] = "Unsupported titles/Low line"; [0x007B] = "Unsupported titles/Left curly bracket"; [0x007C] = "Unsupported titles/Vertical line"; [0x007D] = "Unsupported titles/Right curly bracket"; [0x1680] = "Unsupported titles/Ogham space"; [0xFFFD] = "Unsupported titles/Replacement character"; }

function export.get_entry_title(codepoint) if unsupported_title[codepoint] then return unsupported_title[codepoint] end if lookup_control(codepoint) ~= "assigned" then return nil end return mw.ustring.char(codepoint) end

return export