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instead-modules/translate.lua

84 lines
2.0 KiB
Lua

translate = {};
-- redefine to set source language
translate.source = 'ru';
-- Credit: http://lua-users.org/lists/lua-l/2010-04/msg00005.html
function load_mo_file(mo_file)
--------------------------------
-- open file and read data
--------------------------------
local fd,err=io.open(mo_file,"rb")
if not fd then return nil,err end
local mo_data=fd:read("*all")
fd:close()
--------------------------------
-- precache some functions
--------------------------------
local byte=string.byte
local sub=string.sub
--------------------------------
-- check format
--------------------------------
local peek_long --localize
local magic=sub(mo_data,1,4)
-- intel magic 0xde120495
if magic=="\222\018\004\149" then
peek_long=function(offs)
local a,b,c,d=byte(mo_data,offs+1,offs+4)
return ((d*256+c)*256+b)*256+a
end
-- motorola magic = 0x950412de
elseif magic=="\149\004\018\222" then
peek_long=function(offs)
local a,b,c,d=byte(mo_data,offs+1,offs+4)
return ((a*256+b)*256+c)*256+d
end
else
return nil,"no valid mo-file"
end
--------------------------------
-- version
--------------------------------
local V=peek_long(4)
if V~=0 then
return nul,"unsupported version"
end
------------------------------
-- get number of offsets of table
------------------------------
local N,O,T=peek_long(8),peek_long(12),peek_long(16)
------------------------------
-- traverse and get strings
------------------------------
local hash={}
for nstr=1,N do
local ol,oo=peek_long(O),peek_long(O+4) O=O+8
local tl,to=peek_long(T),peek_long(T+4) T=T+8
hash[sub(mo_data,oo+1,oo+ol)]=sub(mo_data,to+1,to+tl)
end
return hash
end
if not LANG then
LANG = "en"
end
if LANG == translate.source then
_ = function(text)
return text;
end;
else
translate.strings = load_mo_file('translations/' .. LANG .. '.mo');
if translate.strings == nil then
error("translation not found")
end
_ = function(text)
return translate.strings[text];
end
end