librime-lua-script/lua/tools/string.lua at main · shewer/librime-lua-script · GitHub

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-- wrap utf8.sub(str,head_index, tail_index)

-- wrap string.split(str,sp,sp1)

-- string.utf8_len = utf8.len

-- string.utf8_offset= utf8.offset

-- string.utf8_sub= utf8.sub

local List = require 'tools/list'

function string.split( str, sp,sp1)

sp =type(sp) == "string" and sp or " "

if #sp == 0 then

sp= "([%z\1-\127\194-\244][\128-\191]*)"

elseif #sp == 1 then

sp= "[^" .. (sp=="%" and "%%" or sp) .. "]*"

else

sp1= sp1 or "^"

str=str:gsub(sp,sp1)

sp= "[^".. sp1 .. "]*"

end

local tab= List()

for v in str:gmatch(sp) do

table.insert(tab,v)

end

return tab

end

function utf8.sub(str,si,ei)

local si_type= type(si)

if si_type ~= "number" then

local info=debug.getinfo(2,'Sln')

local error_msg= string.format("%s:%s bad argument #1 (number expected, get %s)",

info.short_src, info.currentline, si_type)

assert(nil, error_msg)

end

local len= utf8.len(str)

if si <0 then

si = si < -len and 1 or len + si + 1

end

ei = (not ei or ei >len ) and len or ei

if ei < 0 then

ei = ei < -len and 0 or len + ei +1

end

if si > ei then return "" end

local u_si= utf8.offset(str,si)

local u_ei= utf8.offset(str,ei+1) - 1

return str:sub(u_si,u_ei)

end

string.utf8_len= utf8.len

string.utf8_offset=utf8.offset

string.utf8_sub= utf8.sub

return true

librime-lua-script/lua/tools/string.lua at main · shewer/librime-lua-script · GitHub

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