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local unescape_string
do
local schartbl = { -- https://en.wikipedia.org/wiki/Escape_sequences_in_C
a = "\a",
b = "\b",
e = string.char(0x1b),
f = "\f",
n = "\n",
r = "\r",
t = "\t",
v = "\v",
}
local function replace_single(pfx, c)
local pl = #pfx
if pl % 2 == 0 then
return string.sub(pfx, 1, pl/2) .. c
end
return string.sub(pfx, 1, math.floor(pl/2)) .. (schartbl[c] or c)
end
unescape_string = function(str)
return string.gsub(str, [[(\+)([abefnrtv'"?])]], replace_single)
end
end
local function readstring_aux(str, pos)
local _, spos = string.find(str, [[^%s*"]], pos)
if not spos then
return nil
end
local ipos = spos
while true do
local _, epos, m = string.find(str, [[(\*)"]], ipos+1)
if not epos then
return error("String extends beyond the end of input")
end
ipos = epos
if #m % 2 == 0 then
return unescape_string(string.sub(str, spos+1, epos-1)), epos+1
end
end
end
local function readstring(str, pos)
local st = {}
local nxt = pos
while true do
local s, npos = readstring_aux(str, nxt)
if not s then
if not st[1] then
return nil, nxt
else
return table.concat(st), nxt
end
end
nxt = npos
table.insert(st, s)
end
end
local function readtoken(str, pos)
local _, epos, tok = string.find(str, [[^%s*(%S+)]], pos)
if epos == nil then
return nil, pos
end
return tok, epos+1
end
local function readcomment_add_flags(flags, s)
for flag in string.gmatch(s, ",%s*([^,]+)") do
flags[flag] = true
end
end
local function readcomment_aux(str, pos)
local _, epos, sval = string.find(str, "^\n*#([^\n]*)", pos)
if not epos then
return nil
end
return sval, epos+1
end
local function readcomment(str, pos)
local st = {}
local nxt = pos
local flags = {}
while true do
local s, npos = readcomment_aux(str, nxt)
if not npos then
local t = {
comment = table.concat(st, "\n"),
flags = flags,
}
return t, nxt
end
if string.sub(s, 1, 1) == "," then
readcomment_add_flags(flags, s)
end
table.insert(st, s)
nxt = npos
end
end
local function readpo(str)
local st = {}
local pos = 1
while true do
local entry, nxt = readcomment(str, pos)
local msglines = 0
while true do
local tok, npos = readtoken(str, nxt)
if tok == nil or string.sub(tok, 1, 1) == "#" then
break
elseif string.sub(tok, 1, 3) ~= "msg" then
return error("Invalid token: " .. tok)
elseif entry[tok] ~= nil then
break
else
local value, npos = readstring(str, npos)
assert(value ~= nil, "No string provided for " .. tok)
entry[tok] = value
nxt = npos
msglines = msglines+1
end
end
if msglines == 0 then
return st
elseif entry.msgid ~= "" then
assert(entry.msgid ~= nil, "Missing untranslated string")
assert(entry.msgstr ~= nil, "Missing translated string")
table.insert(st, entry)
end
pos = nxt
end
end
local escape_lookup = {
["="] = "@=",
["\n"] = "@n"
}
local function escape_string(st)
return (string.gsub(st, "[=\n]", escape_lookup))
end
local function convert_po_string(textdomain, str)
local st = {string.format("# textdomain: %s", textdomain)}
for _, entry in ipairs(readpo(str)) do
local line = ("%s=%s"):format(escape_string(entry.msgid), escape_string(entry.msgstr))
if entry.flags.fuzzy then
line = "#" .. line
end
table.insert(st, line)
end
return table.concat(st, "\n")
end
local function convert_po_file(textdomain, inpath, outpath)
local f, err = io.open(inpath, "rb")
assert(f, err)
local str = convert_po_string(textdomain, f:read("*a"))
f:close()
minetest.safe_file_write(outpath, str)
return str
end
local function convert_flat_po_directory(textdomain, modpath)
assert(textdomain, "No textdomain specified for po file conversion")
local mp = modpath or minetest.get_modpath(textdomain)
assert(mp ~= nil, "No path to write for " .. textdomain)
local popath = mp .. "/po"
local trpath = mp .. "/locale"
for _, infile in pairs(minetest.get_dir_list(popath, false)) do
local lang = string.match(infile, [[^([^%.]+)%.po$]])
if lang then
local inpath = popath .. "/" .. infile
local outpath = ("%s/%s.%s.tr"):format(trpath, textdomain, lang)
convert_po_file(textdomain, inpath, outpath)
end
end
end
return {
from_string = convert_po_string,
from_file = convert_po_file,
from_flat = convert_flat_po_directory,
}
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