Module:inc-mbn-translit

The following documentation is located at Module:inc-mbn-translit/documentation. ^[edit]

Useful links: subpage list • links • transclusions • testcases • sandbox (diff)

This module will transliterate Middle Bengali language text. The module should preferably not be called directly from templates or other modules. To use it from a template, use {{xlit}}. Within a module, use Module:languages#Language:transliterate.

For testcases, see Module:inc-mbn-translit/testcases.

Functions

tr(text, lang, sc)

Transliterates a given piece of text written in the script specified by the code sc, and language specified by the code lang.

When the transliteration fails, returns nil.

---

-- Transliteration for Middle Bengali

local export = {}
local gsub = mw.ustring.gsub
local match = mw.ustring.match

local char = {
	-- consonants
	["ক"] = "k",	["খ"] = "kh",	["গ"] = "g",	["ঘ"] = "gh",	["ঙ"] = "ṅ",
	["চ"] = "c",	["ছ"] = "ch",	["জ"] = "j",	["ঝ"] = "jh",	["ঞ"] = "ñ",
	["ট"] = "ṭ",	["ঠ"] = "ṭh",	["ড"] = "ḍ",	["ঢ"] = "ḍh",	["ণ"] = "ṇ",
	["ত"] = "t",	["থ"] = "th",	["দ"] = "d",	["ধ"] = "dh",	["ন"] = "n",
	["প"] = "p",	["ফ"] = "ph",	["ব"] = "b",	["ভ"] = "bh",	["ম"] = "m",
	["য"] = "j",	["র"] = "r",	["ল"] = "l",
	["শ"] = "ś",	["ষ"] = "ṣ",	["স"] = "s",	["হ"] = "h",	
	["য়"] = "ẏ",	["ড়"] = "ṛ",	["ঢ়"] = "ṛh",

	-- vowel diacritics
	["ি"] = "i",	["ু"] = "u",	
	["ৃ"] = "ri",	["ে"] = "e",	["ো"] = "ō",
	["া"] = "a",	["ী"] = "i",	["ূ"] = "u",	["ৈ"] = "ōi",	["ৌ"] = "ōu",

	-- archaic vowel diacritics
	["ৄ"] = "ri",	["ৢ"] = "li",	["ৣ"] = "li",

	-- visarga
	["ঃ"] = "ḥ",

	-- vowel signs
	["অ"] = "o", 	["ই"] = "i",	["উ"] = "u",	
	["ঋ"] = "ri",	["এ"] = "e",	["ও"] = "ō",
	["আ"] = "a",	["ঈ"] = "i",	["ঊ"] = "u",	["ঐ"] = "ōi",	["ঔ"] = "ōu",

	-- archaic vowel signs
	["ৠ"] = "ri",	["ঌ"] = "li",	["ৡ"] = "li",

	--virama
	["্"] = "",

	-- chandrabindu
	["ঁ"] = "̃",
	
	-- avagraha
	['ঽ']='’',
		
	-- anusvara
	["ং"] = "ṅ",

	-- khandata, 
	["ৎ"] = "t",

	-- numerals
	["০"] = "0", ["১"] = "1", ["২"] = "2", ["৩"] = "3", ["৪"] = "4", 
	["৫"] = "5", ["৬"] = "6", ["৭"] = "7", ["৮"] = "8", ["৯"] = "9",
 
	-- punctuation
	["।"] = ".", -- dãri
}

local consonant, vowel, vowel_sign = "ক-হড়-য়", "oা-ৌ’", "অ-ঔ"
local c = "[" .. consonant .. "]"
local cc = "়?" .. c
local v = "[" .. vowel .. vowel_sign .. "o]"
local syncope_pattern = "(" .. v .. cc .. v .. cc .. ")o(" .. cc .. "ঁ?" .. v .. ")"


local function rev_string(text)
	local result, length = "", mw.ustring.len(text)
	for i = 1, length do
		result = result .. mw.ustring.sub(text, length - i + 1, length - i + 1)
	end
	return result
end

function export.tr(text, lang, sc, override)
	text = gsub(text, "(" .. c .. ")ও", "%1্ও")
	text = gsub(text, "^(" .. c .. ")্ও", "%1ও")

	text = gsub(text, "([কখগঘ])([গচছট-ধস])", "%1্%2")
	text = gsub(text, "^([কখগঘ])্([গচছট-ধস])", "%1%2")
	text = gsub(text, "([কখগঘ])্([ড়ঢ়])", "%1%2")

	text = gsub(text, "কব", "ক্b")
	text = gsub(text, "^ক্b", "কb")

	text = gsub(text, "(" .. c .. ")্‌(" .. c .. ")$", "%1্%2্")
	text = gsub(text, "(" .. c .. ")্‌(" .. c .. ") ", "%1্%2্ ")

	text = gsub(text, "([ট-ধ])([ক-ঘ])(" .. v .. ")", "%1্%2%3")
	text = gsub(text, "^([ট-ধ])্([ক-ঘ])(" .. v .. ")", "%1%2%3")
	text = gsub(text, " ^([ট-ধ])্([ক-ঘ])(" .. v .. ")", " %1%2%3")

	text = gsub(text, "ন([চ-ঝট-ঢশ-হ])", "ন্%1")
	text = gsub(text, "^ন্([চ-ঝট-ঢশ-হ])", "ন%1")
	text = gsub(text, " ন্([চ-ঝট-ঢশ-হ])", " ন%1")

	text = gsub(text, "প([ঙঞণনম])", "প্%1")
	text = gsub(text, "^প্([ঙঞণনম])", "প%1")
	text = gsub(text, "ফ([ঙঞণত-নমরল])", "ফ্%1")
	text = gsub(text, "^ফ্([ঙঞণত-নমরল])", "ফ%1")

	text = gsub(text, "(" .. v .. ")ঞ(" .. v .. ")", "%1̃%2")

	text = gsub(text, "(" .. c .. "়?)([" .. vowel .. "’?্]?)", function(a, b)
		return a .. (b == "" and "o" or b) end)
	
	for word in mw.ustring.gmatch(text, "[ঁ-৽o’]+") do
		local orig_word = word
		word = rev_string(word)
		word = gsub(word, "^o(়?" .. c .. ")(ঁ?" .. v .. ")", "%1%2")
		while match(word, syncope_pattern) do
			word = gsub(word, syncope_pattern, "%1%2")
		end
		text = gsub(text, orig_word, rev_string(word))
	end

	text = gsub(text, "্ম", "ṃ")
	text = gsub(text, "্য", "y")
	text = gsub(text, "্ব", "v")

	text = gsub(text, "িত$", "ito")
	text = gsub(text, "িত ", "ito ")

	text = gsub(text, "ৃত$", "rito")
	text = gsub(text, "ৃত ", "rito ")

	text = gsub(text, "ছিল$", "chilo")
	text = gsub(text, "ছিল ", "chilo ")
	
	text = gsub(text, ".[়’]?", char)
	text = gsub(text, ".", char)

	local v_Latn = "[oaiueō]"
	local c_Latn = "[bcdḍghjklmṃnṇprsśṣtṭvẇyẏ]"
	local consonants_no_h = "[bcdgjklmnpsśtṭḍ]"

	-- inherent vowel deletion
	text = gsub(text, "(".. v_Latn .. ")bo([bnp])(".. v_Latn .. ")", "%1b%2%3")
	text = gsub(text, "(".. v_Latn .. ")do([bp])(".. v_Latn .. ")", "%1d%2%3")
	text = gsub(text, "(".. v_Latn .. ")dho([bp])(".. v_Latn .. ")", "%1dh%2%3")
	text = gsub(text, "(".. v_Latn .. ")lo([bp])(".. v_Latn .. ")", "%1l%2%3")
	text = gsub(text, "(".. v_Latn .. ")mo([bkprṛ])(".. v_Latn .. ")", "%1m%2%3")
	text = gsub(text, "(".. v_Latn .. ")ro([bcghjpsś]h?)(".. v_Latn .. ")", "%1r%2%3")
	text = gsub(text, "goñjo$", "gonj") -- exceptional
	text = gsub(text, "goñjo ", "gonj ") -- exceptional

	-- Cv
	text = gsub(text, "([bgmr])v", "%1b")
	text = gsub(text, "hv", "hb")
	text = gsub(text, "udv", "udb")
	text = gsub(text, "ttv", "tt")
	text = gsub(text, "^sv", "ś") -- initial
	text = gsub(text, "([sś])v", "śś") -- medial

	text = gsub(text, "^(" .. consonants_no_h .. "h?)v", "%1") -- initial
	text = gsub(text, "(" .. consonants_no_h .. ")v", "%1%1") -- medial
	text = gsub(text, "(" .. consonants_no_h .. ")hv", "%1%1h") -- medial_h

	--ahb, ihb
    text = gsub(text, "ahb", "aōbh")
    text = gsub(text, "ihb", "iubh")

	-- kṣ
	text = gsub(text, "^kṣ", "kh") -- initial
	text = gsub(text, "kṣ", "kkh") -- medial
	text = gsub(text, "okkhṃ", "okkh") -- medial_m

	-- sm
	text = gsub(text, "^([ṣs])ṃ(" .. v_Latn .. ")", "ś%2̃") -- initial
	text = gsub(text, "([ṣs])ṃ(" .. v_Latn .. ")", "śś%2̃") -- medial

	-- tm
	text = gsub(text, "^tṃ", "t") -- initial
	text = gsub(text, "tṃ", "tt") -- medial

	text = gsub(text, "ṃ", "m")
	text = gsub(text, "ṣ", "ś")

	-- rules for changing s to ś (applicable for native words only)
	text = gsub(text, "s(".. v_Latn .. ")$", "ś%1")
	text = gsub(text, "s(".. v_Latn .. ") ", "ś%1 ")
	text = gsub(text, "s([oō])", "ś%1")
	text = gsub(text, "os$", "oś")
	text = gsub(text, "os ", "oś ")

	text = gsub(text, "śl", "sl")
	text = gsub(text, "śr", "sr")
	text = gsub(text, "sp", "śp")
	text = gsub(text, "^śp", "sp")
	text = gsub(text, " śp", " sp")

	-- visarga deletion
	text = gsub(text, "ḥkh", "kkh")

	-- jñ
	text = gsub(text, "jñ", "gy")

	text = gsub(text, "ñ", "n")

	text = gsub(text, "nḍo$", "nḍ")
	text = gsub(text, "nḍo ", "nḍ ")

	text = gsub(text, "rko$", "rk")
	text = gsub(text, "rko ", "rk ")

	text = gsub(text, "(" .. v_Latn .. ")h$", "%1ho")
	text = gsub(text, "(" .. v_Latn .. ")h ", "%1ho ")

	text = gsub(text, "([glś])aho$", "%1ah")
	text = gsub(text, "([glś])aho ", "%1ah ")

	text = gsub(text, "ṇn", "ṇon")
	text = gsub(text, "ṇ", "n")

	text = gsub(text, "^ek", "êk")
	text = gsub(text, "^oya", "ê")
	text = gsub(text, "^eya", "ê")

	text = gsub(text, "^(" .. consonants_no_h .. "h?)ya", "%1ê") -- initial
	text = gsub(text, " (" .. consonants_no_h .. "h?)ya", " %1ê") -- initial
	text = gsub(text, "^hya", "hê") -- h_initial
	text = gsub(text, "gya", "ggê") -- g_medial
	text = gsub(text, "yal$", "êl") -- final_l

	text = gsub(text, "yanḍ", "ênḍ")

	-- Cy
	text = gsub(text, "^(" .. consonants_no_h .. "h?)y", "%1") -- initial
	text = gsub(text, "(" .. consonants_no_h .. ")y", "%1%1") -- medial
	text = gsub(text, "(" .. consonants_no_h .. ")hy", "%1%1h") -- medial_h
	text = gsub(text, "^hy", "jh") -- h_initial
	text = gsub(text, "hy", "jjh") -- h_medial
	text = gsub(text, "ry", "rj")

	text = gsub(text, "ẏo([gklmn])([aeiīōuū])", "ẏ%1%2")
	text = gsub(text, "ẏoō", "ẏō")
	text = gsub(text, "oō$", "ō")

	text = gsub(text, "([ei])ẏ([" .. consonant .. "])", "%1ẏo%2")
	text = gsub(text, "([ei])ẏ$", "%1ẏo")

	text = gsub(text, "śṭh$", "śṭho")

	text = gsub(text, "^([kg]h?)([dḍtṭ])", "%1o%2")
	text = gsub(text, "([au])b$", "%1bo")
	text = gsub(text, "([au])b ", "%1bo ")

	text = gsub(text, "([tb]h?)ob$", "%1obo") -- exceptional
	text = gsub(text, "([tb]h?)ob ", "%1obo ") -- exceptional

	text = gsub(text, "([au])bh$", "%1bho")
	text = gsub(text, "([au])bh ", "%1bho ")
	text = gsub(text, "^l([au])bho$", "l%1bh")
	text = gsub(text, "^l([au])bho ", "l%1bh ")

	text = gsub(text, "lona$", "lna")
	text = gsub(text, "nola$", "nla")

	text = gsub(text, "ōẏ", "ōẇ")
	text = gsub(text, "ō̃ẏ", "ō̃ẇ")

	text = gsub(text, "oo", "o")

	if match(text, "[ঁ-৽]") and mode ~= "debug" then
		return nil
	else
		return mw.ustring.toNFC(text)
	end
end
 
return export