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if not modules then modules = { } end modules ['syst-aux'] = {
version = 1.001,
comment = "companion to syst-aux.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local settings_to_array = utilities.parsers.settings_to_array
local concat = table.concat
local setvalue = context.setvalue
function commands.getfirstcharacter(str)
local first, rest = utf.match(str,"(.?)(.*)$")
setvalue("firstcharacter",first)
setvalue("remainingcharacters",rest)
end
function commands.doiffirstcharelse(chr,str)
commands.doifelse(utf.sub(str,1,1) == chr)
end
-- function commands.addtocommalist(list,item)
-- if list == "" then
-- context(item)
-- else
-- context("%s,%s",list,item) -- using tex.print is some 10% faster
-- end
-- end
--
-- function commands.removefromcommalist(list,item)
-- if list == "" then
-- context(item)
-- else
-- -- okay, using a proper lpeg is probably faster
-- -- we could also check for #l = 1
-- local l = settings_to_array(list)
-- local t, n = { }
-- for i=1,#l do
-- if l[i] ~= item then
-- n = n + 1
-- t[n] = item
-- end
-- end
-- if n == 0 then
-- context(item)
-- else
-- context(concat(list,","))
-- end
-- end
-- end
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