42 lines
1.1 KiB
Lua
42 lines
1.1 KiB
Lua
-- 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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