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-- $Id: lualatexquotejobname.tex 22957 2011-06-13 20:49:26Z mpg $
-- Manuel Pegourie-Gonnard, originally written 2010. WTFPL v2.
--
-- Used in lualatexquotejobname.tex
--
-- Try to replicate web2c's function normalize_quotes() (in lib/texmfmp.c,
-- non-XeTeX version) as closely as possible (that is, exactly except error
-- handling).
--
-- Cache the results of previous calls, not so much for the speed gain which
-- probably doesn't matter, but to avoid repeated error messages.
local jobname_cache = {}
callback.register('process_jobname', function(jobname)
-- use a cached version if available
local cached = jobname_cache[jobname]
if cached ~= nil then return cached end
-- remove the quotes in jobname
local clean, n_quotes = jobname:gsub([["]], [[]])
-- complain if they wasn't an even number of quotes (aka unbalanced)
if n_quotes % 2 ~= 0 then
-- this code is executed when jobname is first expanded, which is
-- probably too late for an early exit as in web2c's normalize_quotes()
-- so, just throw an error without exiting
texio.write_nl('! Unbalanced quotes in jobname: ' .. jobname )
end
-- add quotes around the clean up jobname if necessary
if jobname:find(' ') then
clean = '"' .. clean .. '"'
end
-- remember the result before returning
jobname_cache[jobname] = clean
return clean
end)
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