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if not modules then modules = { } end modules ['sort-ini'] = {
version = 1.001,
comment = "companion to sort-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- It took a while to get there, but with Fleetwood Mac's "Don't Stop"
-- playing in the background we sort of got it done.
-- todo: cleanup splits (in other modules)
local utf = unicode.utf8
local gsub, rep, sort, concat = string.gsub, string.rep, table.sort, table.concat
local utfbyte, utfchar = utf.byte, utf.char
local utfcharacters, utfvalues, strcharacters = string.utfcharacters, string.utfvalues, string.characters
local chardata = characters.data
local next, type, tonumber = next, type, tonumber
local allocate = utilities.storage.allocate
local trace_tests = false trackers.register("sorters.tests", function(v) trace_tests = v end)
local report_sorters = logs.new("sorters")
local comparers = { }
local splitters = { }
local entries = allocate()
local mappings = allocate()
local replacements = allocate()
local ignoredoffset = 0x10000
local replacementoffset = 0x10000
local digitsoffset = 0x20000
local digitsmaximum = 0xFFFFF
sorters = {
comparers = comparers,
splitters = splitters,
entries = entries,
mappings = mappings,
replacements = replacements,
constants = {
ignoredoffset = ignoredoffset,
replacementoffset = replacementoffset,
digitsoffset = digitsoffset,
digitsmaximum = digitsmaximum,
}
}
local ssorters = sorters
local language, defaultlanguage = 'en', 'en'
local currentreplacements, currentmappings, currententries = { }, { }, { }
function sorters.setlanguage(lang)
language = lang or language or defaultlanguage
currentreplacements = replacements[language] or replacements[defaultlanguage] or { }
currentmappings = mappings [language] or mappings [defaultlanguage] or { }
currententries = entries [language] or entries [defaultlanguage] or { }
if trace_tests then
report_sorters("setting language '%s'",language)
end
return currentreplacements, currentmappings, currententries
end
-- maybe inline code if it's too slow
local function basicsort(sort_a,sort_b)
if not sort_a or not sort_b then
return 0
elseif #sort_a > #sort_b then
if #sort_b == 0 then
return 1
else
for i=1,#sort_b do
local ai, bi = sort_a[i], sort_b[i]
if ai > bi then
return 1
elseif ai < bi then
return -1
end
end
return 1
end
elseif #sort_a < #sort_b then
if #sort_a == 0 then
return -1
else
for i=1,#sort_a do
local ai, bi = sort_a[i], sort_b[i]
if ai > bi then
return 1
elseif ai < bi then
return -1
end
end
return -1
end
elseif #sort_a == 0 then
return 0
else
for i=1,#sort_a do
local ai, bi = sort_a[i], sort_b[i]
if ai > bi then
return 1
elseif ai < bi then
return -1
end
end
return 0
end
end
function comparers.basic(a,b)
local ea, eb = a.split, b.split
local na, nb = #ea, #eb
if na == 0 and nb == 0 then
-- simple variant (single word)
local result = basicsort(ea.e,eb.e)
return result == 0 and result or basicsort(ea.m,eb.m)
else
-- complex variant, used in register (multiple words)
local result = 0
for i=1,nb < na and nb or na do
local eai, ebi = ea[i], eb[i]
result = basicsort(eai.e,ebi.e)
if result == 0 then
result = basicsort(eai.m,ebi.m) -- only needed it there are m's
end
if result ~= 0 then
break
end
end
if result ~= 0 then
return result
elseif na > nb then
return 1
elseif nb > na then
return -1
else
return 0
end
end
end
local function numify(s)
return rep(" ",10-#s) .. s -- or format with padd
end
local function numify(s)
s = digitsoffset + tonumber(s)
if s > digitsmaximum then
s = digitsmaximum
end
return utfchar(s)
end
function sorters.strip(str) -- todo: only letters and such utf.gsub("([^%w%d])","")
if str then
str = gsub(str,"\\%S*","")
str = gsub(str,"[%s%[%](){}%$\"\']*","")
str = gsub(str,"(%d+)",numify) -- sort numbers properly
return str
else
return ""
end
end
local function firstofsplit(entry)
-- numbers are left padded by spaces
local split = entry.split
if #split > 0 then
split = split[1].s
else
split = split.s
end
local entry = split and split[1] or ""
return entry, currententries[entry] or "\000"
end
sorters.firstofsplit = firstofsplit
-- beware, numbers get spaces in front
function splitters.utf(str)
if #currentreplacements > 0 then
for k=1,#currentreplacements do
local v = currentreplacements[k]
str = gsub(str,v[1],v[2])
end
end
local s, e, m, n = { }, { }, { }, 0
for sc in utfcharacters(str) do -- maybe an lpeg
local ec, mc = currententries[sc], currentmappings[sc] or utfbyte(sc)
n = n + 1
s[n] = sc
e[n] = currentmappings[ec] or mc
m[n] = mc
end
return { s = s, e = e, m = m }
end
-- we can use one array instead (sort of like in mkii)
-- but for the moment we do it this way as it is more
-- handy for tracing
-- function splitters.utf(str)
-- if #currentreplacements > 0 then
-- for k=1,#currentreplacements do
-- local v = currentreplacements[k]
-- str = gsub(str,v[1],v[2])
-- end
-- end
-- local s, e, m, n = { }, { }, { }, 0
-- for sc in utfcharacters(str) do -- maybe an lpeg
-- local ec, mc = currententries[sc], currentmappings[sc] or utfbyte(sc)
-- n = n + 1
-- ec = currentmappings[ec] or mc
-- s[n] = sc
-- e[n] = ec
-- if ec ~= mc then
-- n = n + 1
-- e[n] = mc
-- end
-- end
-- return { s = s, e = e }
-- end
function table.remap(t)
local tt = { }
for k,v in next, t do
tt[v] = k
end
return tt
end
local function pack(entry)
local t = { }
local split = entry.split
if #split > 0 then
for i=1,#split do
local tt, li = { }, split[i].s
for j=1,#li do
local lij = li[j]
tt[j] = utfbyte(lij) > ignoredoffset and "[]" or lij
end
t[i] = concat(tt)
end
return concat(t," + ")
else
local t, li = { }, split.s
for j=1,#li do
local lij = li[j]
t[j] = utfbyte(lij) > ignoredoffset and "[]" or lij
end
return concat(t)
end
end
function sorters.sort(entries,cmp)
if trace_tests then
sort(entries,function(a,b)
local r = cmp(a,b)
report_sorters("%s %s %s",pack(a),(not r and "?") or (r<0 and "<") or (r>0 and ">") or "=",pack(b))
return r == -1
end)
local s
for i=1,#entries do
local entry = entries[i]
local letter, first = firstofsplit(entry)
if first == s then
first = " "
else
s = first
report_sorters(">> %s 0x%05X (%s 0x%05X)",first,utfbyte(first),letter,utfbyte(letter))
end
report_sorters(" %s",pack(entry))
end
else
sort(entries,function(a,b)
return cmp(a,b) == -1
end)
end
end
-- some day we can have a characters.upper and characters.lower
function sorters.adduppercasereplacements(what)
local rep, new = replacements[what], { }
for i=1,#rep do
local r = rep[i]
local u = chardata[utfbyte(r[1])].uccode
if u then
new[utfchar(u)] = r[2]
end
end
for k, v in next, new do
rep[k] = v
end
end
function sorters.adduppercaseentries(what)
local ent, new = entries[what], { }
for k, v in next, ent do
local u = chardata[utfbyte(k)].uccode
if u then
new[utfchar(u)] = v
end
end
for k, v in next, new do
ent[k] = v
end
end
function sorters.adduppercasemappings(what,offset)
local map, new, offset = mappings[what], { }, offset or 0
for k, v in next, map do
local u = chardata[utfbyte(k)].uccode
if u then
new[utfchar(u)] = v + offset
end
end
for k, v in next, new do
map[k] = v
end
end
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