无视编码都统一转成unicode 然后截断 例如 。“发发发发发发” 操作之后显示为 “发发发发...”

-- local function checkPlayName( str )

-- str = Utils.utf8_to_unicode(str)
-- local retStr = ""
-- local num = 0
-- local lenInByte = #str
-- local x = 1

-- for i=1,lenInByte do
-- i = x
-- local curByte = string.byte(str, x)
-- local byteCount = 1;
-- if curByte>0 and curByte<=127 then
-- byteCount = 1
-- elseif curByte>127 and curByte<240 then
-- byteCount = 3
-- elseif curByte>=240 and curByte<=247 then
-- byteCount = 4
-- end
-- local curStr = string.sub(str, i, i+byteCount-1)
-- retStr = retStr .. curStr
-- x = x + byteCount
-- if x >= lenInByte then
-- local finalRetStr = Utils.unicode_to_utf8(retStr)
-- return finalRetStr
-- end
-- num = num + 1
-- if num >= 24 then
-- retStr = retStr.."..."
-- local finalRetStr = Utils.unicode_to_utf8(retStr)
-- return finalRetStr
-- end
-- end
-- local finalRetStr = Utils.unicode_to_utf8(retStr)
-- return finalRetStr
-- end
-- Utils.checkPlayName = checkPlayName

-- local bit = require("bit")

-- local function unicode_to_utf8(convertStr)

-- if type(convertStr)~="string" then
-- return convertStr
-- end

-- local resultStr=""
-- local i=1
-- while true do

-- local num1=string.byte(convertStr,i)
-- local unicode

-- if num1~=nil and string.sub(convertStr,i,i+1)=="\\u" then
-- unicode=tonumber("0x"..string.sub(convertStr,i+2,i+5))
-- i=i+6
-- elseif num1~=nil then
-- unicode=num1
-- i=i+1
-- else
-- break
-- end

-- print(unicode)

-- if unicode <= 0x007f then

-- resultStr=resultStr..string.char(bit.band(unicode,0x7f))

-- elseif unicode >= 0x0080 and unicode <= 0x07ff then

-- resultStr=resultStr..string.char(bit.bor(0xc0,bit.band(bit.rshift(unicode,6),0x1f)))

-- resultStr=resultStr..string.char(bit.bor(0x80,bit.band(unicode,0x3f)))

-- elseif unicode >= 0x0800 and unicode <= 0xffff then

-- resultStr=resultStr..string.char(bit.bor(0xe0,bit.band(bit.rshift(unicode,12),0x0f)))

-- resultStr=resultStr..string.char(bit.bor(0x80,bit.band(bit.rshift(unicode,6),0x3f)))

-- resultStr=resultStr..string.char(bit.bor(0x80,bit.band(unicode,0x3f)))

-- end

-- end

-- resultStr=resultStr..'\0'

-- print(resultStr)

-- return resultStr

-- end
-- Utils.unicode_to_utf8 = unicode_to_utf8

-- local function utf8_to_unicode(convertStr)

-- if type(convertStr)~="string" then
-- return convertStr
-- end

-- local resultStr=""
-- local i=1
-- local num1=string.byte(convertStr,i)

-- while num1~=nil do

-- print(num1)

-- local tempVar1,tempVar2

-- if num1 >= 0x00 and num1 <= 0x7f then

-- tempVar1=num1

-- tempVar2=0

-- elseif bit.band(num1,0xe0)== 0xc0 then

-- local t1 = 0
-- local t2 = 0

-- t1 = bit.band(num1,bit.rshift(0xff,3))
-- i=i+1
-- num1=string.byte(convertStr,i)

-- t2 = bit.band(num1,bit.rshift(0xff,2))


-- tempVar1=bit.bor(t2,bit.lshift(bit.band(t1,bit.rshift(0xff,6)),6))

-- tempVar2=bit.rshift(t1,2)

-- elseif bit.band(num1,0xf0)== 0xe0 then

-- local t1 = 0
-- local t2 = 0
-- local t3 = 0

-- t1 = bit.band(num1,bit.rshift(0xff,3))
-- i=i+1
-- num1=string.byte(convertStr,i)
-- t2 = bit.band(num1,bit.rshift(0xff,2))
-- i=i+1
-- num1=string.byte(convertStr,i)
-- t3 = bit.band(num1,bit.rshift(0xff,2))

-- tempVar1=bit.bor(bit.lshift(bit.band(t2,bit.rshift(0xff,6)),6),t3)
-- tempVar2=bit.bor(bit.lshift(t1,4),bit.rshift(t2,2))

-- end

-- resultStr=resultStr..string.format("\\u%02x%02x",tempVar2,tempVar1)
-- print(resultStr)

-- i=i+1
-- num1=string.byte(convertStr,i)
-- end

-- print(resultStr)

-- return resultStr

-- end
-- Utils.utf8_to_unicode = utf8_to_unicode