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if not modules then modules = { } end modules ['syst-lua'] = {
version = 1.001,
comment = "companion to syst-lua.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local texsprint, texprint, texwrite, texiowrite_nl = tex.sprint, tex.print, tex.write, texio.write_nl
local format, find = string.format, string.find
local tonumber = tonumber
local S, Ct, lpegmatch, lpegsplitat = lpeg.S, lpeg.Ct, lpeg.match, lpeg.splitat
local ctxcatcodes = tex.ctxcatcodes
commands = commands or { } -- cs = commands -- shorter, maybe some day, not used now
function commands.writestatus(...) logs.status(...) end -- overloaded later
-- todo: use shorter names i.e. less tokenization
local function testcase(b)
if b then -- looks faster with if than with expression
texsprint(ctxcatcodes,"\\firstoftwoarguments")
else
texsprint(ctxcatcodes,"\\secondoftwoarguments")
end
end
commands.testcase = testcase
commands.doifelse = testcase
function commands.doif(b)
if b then
texsprint(ctxcatcodes,"\\firstofoneargument")
else
texsprint(ctxcatcodes,"\\gobbleoneargument")
end
end
function commands.doifnot(b)
if b then
texsprint(ctxcatcodes,"\\gobbleoneargument")
else
texsprint(ctxcatcodes,"\\firstofoneargument")
end
end
function commands.boolcase(b)
if b then texwrite(1) else texwrite(0) end
end
function commands.doifelsespaces(str)
return commands.doifelse(find(str,"^ +$"))
end
local s = Ct(lpegsplitat(","))
local h = { }
function commands.doifcommonelse(a,b)
local ha = h[a]
local hb = h[b]
if not ha then ha = lpegmatch(s,a) h[a] = ha end
if not hb then hb = lpegmatch(s,b) h[b] = hb end
for i=1,#ha do
for j=1,#hb do
if ha[i] == hb[j] then
return testcase(true)
end
end
end
return testcase(false)
end
function commands.doifinsetelse(a,b)
local hb = h[b]
if not hb then hb = lpegmatch(s,b) h[b] = hb end
for i=1,#hb do
if a == hb[i] then
return testcase(true)
end
end
return testcase(false)
end
local pattern = lpeg.patterns.validdimen
function commands.doifdimenstringelse(str)
testcase(lpegmatch(pattern,str))
end
local splitter = lpegsplitat(S(". "))
function commands.doifolderversionelse(one,two) -- one >= two
if not two then
one, two = environment.version, one
elseif one == "" then
one = environment.version
end
local y_1, m_1, d_1 = lpegmatch(splitter,one)
local y_2, m_2, d_2 = lpegmatch(splitter,two)
commands.testcase (
(tonumber(y_1) or 0) >= (tonumber(y_2) or 0) and
(tonumber(m_1) or 0) >= (tonumber(m_2) or 0) and
(tonumber(d_1) or 0) >= (tonumber(d_1) or 0)
)
end
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