Module:bho-translit

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The following documentation is located at Module:bho-translit/documentation.
Useful links: subpage list • links • transclusions • testcases • sandbox

This module will transliterate Bhojpuri language text. It is also used to transliterate Magahi. 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:bho-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 Bhojpuri

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

local conv = {
	-- consonants
	 = 'k',  = 'kh',  = 'g',  = 'gh',  = 'ṅ', 
	 = 'c',  = 'ch',  = 'j',  = 'jh',  = 'ñ', 
	 = 'ṭ',  = 'ṭh',  = 'ḍ',  = 'ḍh',  = 'ṇ',
	 = 't',  = 'th',  = 'd',  = 'dh',  = 'n',
	 = 'p',  = 'ph',  = 'b',  = 'bh',  = 'm', 
	 = 'y',  = 'r',  = 'l',  = 'v',  = 'ḷ',
	 = 'ś',  = 'ṣ',  = 's',  = 'h',
	 = 'ṛ',  = 'ṛh',
	--  = 'gy',

	-- vowel diacritics
	 = 'i',  = 'u',  = 'ē',  = 'e',  = 'ō',  = 'o',
	 = 'ā',  = 'ī',  = 'ū', 
	 = 'ŕ',
	 = 'ai',  = 'au',
	 = 'ŏ',
	 = 'ĕ',
     = 'ː',
     = 'aː',

	-- vowel signs
	 = 'a',  = 'i',  = 'u',  = 'ē', = 'e',  = 'ō', = 'o',
	 = 'ā',  = 'ī',  = 'ū', 
	 = 'ŕ', 
	 = 'ai',  = 'au', 
	 = 'ŏ',
	 = 'ĕ',
	 = 'ü',
     = 'ï',
	 = 'ōm',
	
	-- chandrabindu
	 = '̃',
	
	-- anusvara
	 = 'ṁ',
	
	-- visarga
	 = 'ḥ',
	
	-- virama
	 = '',
	
	-- numerals
	 = '0',  = '1',  = '2',  = '3',  = '4',
	 = '5',  = '6',  = '7',  = '8',  = '9',
	
	-- punctuation
	 = '.', -- danda
	 = '', -- compound separator
	
	-- abbreviation sign
	 = '.',
}

local nasal_assim = {
     = 'न',
	 = 'ङ',  = 'ङ',  = 'ङ',  = 'ङ', 
	 = 'ञ',  = 'ञ',  = 'ञ',  = 'ञ',  
	 = 'ण',  = 'ण',  = 'ण',  = 'ण',
	 = 'म',  = 'म',  = 'म',  = 'म',  = 'म',
}

local perm_cl = {
	 = true,  = true,  = true,
	
}

local all_cons, special_cons = 'कखगघङचछजझञटठडढतथदधपफबभशषसयरलवहणनम', 'यरलवहनम'
local vowel, vowel_sign = 'aिुृेोाीूैौॉॅ꣱', 'अइउएओआईऊऋऐऔऑऍऽ꣱'
local syncope_pattern = '()(़?)a(़?)(?)'

local function rev_string(text)
	local result, length = {}, mw.ustring.len(text)
	for i = 1, length do
		table.insert(result, mw.ustring.sub(text, length - i + 1, length - i + 1))
	end
	return table.concat(result)
end

function export.tr(text, lang, sc)
	text = gsub(
		text,
		'(़?)(?)',
		function(c, d)
			return c .. (d == "" and 'a' or d)
		end
	)

	for word in mw.ustring.gmatch(text, "+") do
		local orig_word = word
		
		word = rev_string(word)
		
		word = gsub(
			word,
			'^a(़?)()(.)(.?)',
			function(opt, first, second, third)
				local a = ""
				if match(first, '')
					and match(second, '्')
					and not perm_cl
					or match(first .. second, 'य') then
						a = "a"
				end
				
				return a .. opt .. first .. second .. third
			end
		)
		
		while match(word, syncope_pattern) do
			word = gsub(word, syncope_pattern, '%1%2ᵊ%3%4')
		end
		
		word = gsub(
			word,
			'(.?)ं(.)',
			function(succ, prev)
				local mid = nasal_assim or "n"
				if succ..prev == "a" then
					mid = "्म" 
				elseif succ == "" and match(prev, '') then
					mid = "̃" 
				end
				return succ .. mid .. prev
			end
		)
		
		text = gsub(text, orig_word, rev_string(word))
	end
	text = gsub(text, '.़?', conv)
	text = gsub(text, 'a()̃', 'a͠%1')
    text = gsub(text, 'ज्ञ', conv)
	return mw.ustring.toNFC(text)
end

return export
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