41 lines
1005 B
Lua
41 lines
1005 B
Lua
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-- wrap utf8.sub(str,head_index, tail_index)
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-- wrap string.split(str,sp,sp1)
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-- string.utf8_len = utf8.len
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-- string.utf8_offset= utf8.offset
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-- string.utf8_sub= utf8.sub
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function string.split( str, sp,sp1)
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sp =type(sp) == "string" and sp or " "
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if #sp == 0 then
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sp= "([%z\1-\127\194-\244][\128-\191]*)"
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elseif #sp == 1 then
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sp= "[^" .. (sp=="%" and "%%" or sp) .. "]*"
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else
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sp1= sp1 or "^"
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str=str:gsub(sp,sp1)
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sp= "[^".. sp1 .. "]*"
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end
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local tab= {}
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for v in str:gmatch(sp) do
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table.insert(tab,v)
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end
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return tab
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end
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function utf8.gsub(str,si,ei)
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local function index(ustr,i)
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return i>=0 and ( ustr:utf8_offset(i) or ustr:len() +1 )
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or ( ustr:utf8_offset(i) or 1 )
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end
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local u_si= index(str,si)
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ei = ei or str:utf8_len()
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ei = ei >=0 and ei +1 or ei
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local u_ei= index(str, ei ) -1
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return str:sub(u_si,u_ei)
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end
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string.utf8_len= utf8.len
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string.utf8_offset=utf8.offset
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string.utf8_sub= utf8.gsub
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return true
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