Lua 实现单例 （userdata） 多继承单例
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--region *.lua--Date --Author WikiChen--[[* 单例* 类似 c/c++ 单例模式* 实现类可以 继承它，实现单例* Note 需要实现 初始化函数 Init--]]--local Singleton = class("Singleton")local Singleton = {}--function Singleton:ctor()-- self:Release()-- self:onCreate()--endlocal setmetatableindex = function(t, index) if type(t) == "userdata" then local peer = tolua.getpeer(t) if not peer then peer = {} tolua.setpeer(t, peer) end setmetatableindex(peer, index) else local mt = getmetatable(t) if not mt then mt = {} end if not mt.__index then mt.__index = index setmetatable(t, mt) elseif mt.__index ~= index then setmetatableindex(mt, index) end endendfunction Singleton:onCreate(obj) obj = obj or {} setmetatable(obj, self) self.__index = self return objendfunction Singleton:Instance() if nil == self._instance then self._instance = self:new() setmetatableindex(self._instance, self) self._instance:init() end return self._instanceendfunction Singleton:Release() if nil ~= self._instance then self._instance = nil endendfunction Singleton:init() print("Error， enter Singleton:init")endreturn Singleton--endregion—————————————————————————————–
–[[
以下抄录自cocos2d-lua 中 function.lua
–]]
--[[Copyright (c) 2011-2014 chukong-inc.comPermission is hereby granted, free of charge, to any person obtaining a copyof this software and associated documentation files (the "Software"), to dealin the Software without restriction, including without limitation the rightsto use, copy, modify, merge, publish, distribute, sublicense, and/or sellcopies of the Software, and to permit persons to whom the Software isfurnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be included inall copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ORIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THEAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHERLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS INTHE SOFTWARE.]]function printLog(tag, fmt, ...) local t = { "[", string.upper(tostring(tag)), "] ", string.format(tostring(fmt), ...) } print(table.concat(t))endfunction printError(fmt, ...) printLog("ERR", fmt, ...) print(debug.traceback("", 2))endfunction printInfo(fmt, ...) if type(DEBUG) ~= "number" or DEBUG < 2 then return end printLog("INFO", fmt, ...)endlocal function dump_value_(v) if type(v) == "string" then v = "\"" .. v .. "\"" end return tostring(v)endfunction dump(value, desciption, nesting) if type(nesting) ~= "number" then nesting = 3 end local lookupTable = {} local result = {} local traceback = string.split(debug.traceback("", 2), "\n") print("dump from: " .. string.trim(traceback[3])) local function dump_(value, desciption, indent, nest, keylen) desciption = desciption or "<var>" local spc = "" if type(keylen) == "number" then spc = string.rep(" ", keylen - string.len(dump_value_(desciption))) end if type(value) ~= "table" then result[#result +1 ] = string.format("%s%s%s = %s", indent, dump_value_(desciption), spc, dump_value_(value)) elseif lookupTable[tostring(value)] then result[#result +1 ] = string.format("%s%s%s = *REF*", indent, dump_value_(desciption), spc) else lookupTable[tostring(value)] = true if nest > nesting then result[#result +1 ] = string.format("%s%s = *MAX NESTING*", indent, dump_value_(desciption)) else result[#result +1 ] = string.format("%s%s = {", indent, dump_value_(desciption)) local indent2 = indent.." " local keys = {} local keylen = 0 local values = {} for k, v in pairs(value) do keys[#keys + 1] = k local vk = dump_value_(k) local vkl = string.len(vk) if vkl > keylen then keylen = vkl end values[k] = v end table.sort(keys, function(a, b) if type(a) == "number" and type(b) == "number" then return a < b else return tostring(a) < tostring(b) end end) for i, k in ipairs(keys) do dump_(values[k], k, indent2, nest + 1, keylen) end result[#result +1] = string.format("%s}", indent) end end end dump_(value, desciption, "- ", 1) for i, line in ipairs(result) do print(line) endendfunction printf(fmt, ...) print(string.format(tostring(fmt), ...))endfunction checknumber(value, base) return tonumber(value, base) or 0endfunction checkint(value) return math.round(checknumber(value))endfunction checkbool(value) return (value ~= nil and value ~= false)endfunction checktable(value) if type(value) ~= "table" then value = {} end return valueendfunction isset(hashtable, key) local t = type(hashtable) return (t == "table" or t == "userdata") and hashtable[key] ~= nilendlocal setmetatableindex_setmetatableindex_ = function(t, index) if type(t) == "userdata" then local peer = tolua.getpeer(t) if not peer then peer = {} tolua.setpeer(t, peer) end setmetatableindex_(peer, index) else local mt = getmetatable(t) if not mt then mt = {} end if not mt.__index then mt.__index = index setmetatable(t, mt) elseif mt.__index ~= index then setmetatableindex_(mt, index) end endendsetmetatableindex = setmetatableindex_function clone(object) local lookup_table = {} local function _copy(object) if type(object) ~= "table" then return object elseif lookup_table[object] then return lookup_table[object] end local newObject = {} lookup_table[object] = newObject for key, value in pairs(object) do newObject[_copy(key)] = _copy(value) end return setmetatable(newObject, getmetatable(object)) end return _copy(object)endfunction class(classname, ...) local cls = {__cname = classname} local supers = {...} for _, super in ipairs(supers) do local superType = type(super) assert(superType == "nil" or superType == "table" or superType == "function", string.format("class() - create class \"%s\" with invalid super class type \"%s\"", classname, superType)) if superType == "function" then assert(cls.__create == nil, string.format("class() - create class \"%s\" with more than one creating function", classname)); -- if super is function, set it to __create cls.__create = super elseif superType == "table" then if super[".isclass"] then -- super is native class assert(cls.__create == nil, string.format("class() - create class \"%s\" with more than one creating function or native class", classname)); cls.__create = function() return super:create() end else -- super is pure lua class cls.__supers = cls.__supers or {} cls.__supers[#cls.__supers + 1] = super if not cls.super then -- set first super pure lua class as class.super cls.super = super end end else error(string.format("class() - create class \"%s\" with invalid super type", classname), 0) end end cls.__index = cls if not cls.__supers or #cls.__supers == 1 then setmetatable(cls, {__index = cls.super}) else setmetatable(cls, {__index = function(_, key) local supers = cls.__supers for i = 1, #supers do local super = supers[i] if super[key] then return super[key] end end end}) end if not cls.ctor then -- add default constructor cls.ctor = function() end end cls.new = function(...) local instance if cls.__create then instance = cls.__create(...) else instance = {} end setmetatableindex(instance, cls) instance.class = cls instance:ctor(...) return instance end cls.create = function(_, ...) return cls.new(...) end return clsendlocal iskindof_iskindof_ = function(cls, name) local __index = rawget(cls, "__index") if type(__index) == "table" and rawget(__index, "__cname") == name then return true end if rawget(cls, "__cname") == name then return true end local __supers = rawget(cls, "__supers") if not __supers then return false end for _, super in ipairs(__supers) do if iskindof_(super, name) then return true end end return falseendfunction iskindof(obj, classname) local t = type(obj) if t ~= "table" and t ~= "userdata" then return false end local mt if t == "userdata" then if tolua.iskindof(obj, classname) then return true end mt = tolua.getpeer(obj) else mt = getmetatable(obj) end if mt then return iskindof_(mt, classname) end return falseendfunction import(moduleName, currentModuleName) local currentModuleNameParts local moduleFullName = moduleName local offset = 1 while true do if string.byte(moduleName, offset) ~= 46 then -- . moduleFullName = string.sub(moduleName, offset) if currentModuleNameParts and #currentModuleNameParts > 0 then moduleFullName = table.concat(currentModuleNameParts, ".") .. "." .. moduleFullName end break end offset = offset + 1 if not currentModuleNameParts then if not currentModuleName then local n,v = debug.getlocal(3, 1) currentModuleName = v end currentModuleNameParts = string.split(currentModuleName, ".") end table.remove(currentModuleNameParts, #currentModuleNameParts) end return require(moduleFullName)endfunction handler(obj, method) return function(...) return method(obj, ...) endendfunction math.newrandomseed() local ok, socket = pcall(function() return require("socket") end) if ok then math.randomseed(socket.gettime() * 1000) else math.randomseed(os.time()) end math.random() math.random() math.random() math.random()endfunction math.round(value) value = checknumber(value) return math.floor(value + 0.5)endlocal pi_div_180 = math.pi / 180function math.angle2radian(angle) return angle * pi_div_180endlocal pi_mul_180 = math.pi * 180function math.radian2angle(radian) return radian / pi_mul_180endfunction io.exists(path) local file = io.open(path, "r") if file then io.close(file) return true end return falseendfunction io.readfile(path) local file = io.open(path, "r") if file then local content = file:read("*a") io.close(file) return content end return nilendfunction io.writefile(path, content, mode) mode = mode or "w+b" local file = io.open(path, mode) if file then if file:write(content) == nil then return false end io.close(file) return true else return false endendfunction io.pathinfo(path) local pos = string.len(path) local extpos = pos + 1 while pos > 0 do local b = string.byte(path, pos) if b == 46 then -- 46 = char "." extpos = pos elseif b == 47 then -- 47 = char "/" break end pos = pos - 1 end local dirname = string.sub(path, 1, pos) local filename = string.sub(path, pos + 1) extpos = extpos - pos local basename = string.sub(filename, 1, extpos - 1) local extname = string.sub(filename, extpos) return { dirname = dirname, filename = filename, basename = basename, extname = extname }endfunction io.filesize(path) local size = false local file = io.open(path, "r") if file then local current = file:seek() size = file:seek("end") file:seek("set", current) io.close(file) end return sizeendfunction table.nums(t) local count = 0 for k, v in pairs(t) do count = count + 1 end return countendfunction table.keys(hashtable) local keys = {} for k, v in pairs(hashtable) do keys[#keys + 1] = k end return keysendfunction table.values(hashtable) local values = {} for k, v in pairs(hashtable) do values[#values + 1] = v end return valuesendfunction table.merge(dest, src) for k, v in pairs(src) do dest[k] = v endendfunction table.insertto(dest, src, begin) begin = checkint(begin) if begin <= 0 then begin = #dest + 1 end local len = #src for i = 0, len - 1 do dest[i + begin] = src[i + 1] endendfunction table.indexof(array, value, begin) for i = begin or 1, #array do if array[i] == value then return i end end return falseendfunction table.keyof(hashtable, value) for k, v in pairs(hashtable) do if v == value then return k end end return nilendfunction table.removebyvalue(array, value, removeall) local c, i, max = 0, 1, #array while i <= max do if array[i] == value then table.remove(array, i) c = c + 1 i = i - 1 max = max - 1 if not removeall then break end end i = i + 1 end return cendfunction table.map(t, fn) for k, v in pairs(t) do t[k] = fn(v, k) endendfunction table.walk(t, fn) for k,v in pairs(t) do fn(v, k) endendfunction table.filter(t, fn) for k, v in pairs(t) do if not fn(v, k) then t[k] = nil end endendfunction table.unique(t, bArray) local check = {} local n = {} local idx = 1 for k, v in pairs(t) do if not check[v] then if bArray then n[idx] = v idx = idx + 1 else n[k] = v end check[v] = true end end return nendstring._htmlspecialchars_set = {}string._htmlspecialchars_set["&"] = "&"string._htmlspecialchars_set["\""] = """string._htmlspecialchars_set["'"] = "'"string._htmlspecialchars_set["<"] = "<"string._htmlspecialchars_set[">"] = ">"function string.htmlspecialchars(input) for k, v in pairs(string._htmlspecialchars_set) do input = string.gsub(input, k, v) end return inputendfunction string.restorehtmlspecialchars(input) for k, v in pairs(string._htmlspecialchars_set) do input = string.gsub(input, v, k) end return inputendfunction string.nl2br(input) return string.gsub(input, "\n", "<br />")endfunction string.text2html(input) input = string.gsub(input, "\t", " ") input = string.htmlspecialchars(input) input = string.gsub(input, " ", " ") input = string.nl2br(input) return inputendfunction string.split(input, delimiter) input = tostring(input) delimiter = tostring(delimiter) if (delimiter=='') then return false end local pos,arr = 0, {} -- for each divider found for st,sp in function() return string.find(input, delimiter, pos, true) end do table.insert(arr, string.sub(input, pos, st - 1)) pos = sp + 1 end table.insert(arr, string.sub(input, pos)) return arrendfunction string.ltrim(input) return string.gsub(input, "^[ \t\n\r]+", "")endfunction string.rtrim(input) return string.gsub(input, "[ \t\n\r]+$", "")endfunction string.trim(input) input = string.gsub(input, "^[ \t\n\r]+", "") return string.gsub(input, "[ \t\n\r]+$", "")endfunction string.ucfirst(input) return string.upper(string.sub(input, 1, 1)) .. string.sub(input, 2)endlocal function urlencodechar(char) return "%" .. string.format("%02X", string.byte(char))endfunction string.urlencode(input) -- convert line endings input = string.gsub(tostring(input), "\n", "\r\n") -- escape all characters but alphanumeric, '.' and '-' input = string.gsub(input, "([^%w%.%- ])", urlencodechar) -- convert spaces to "+" symbols return string.gsub(input, " ", "+")endfunction string.urldecode(input) input = string.gsub (input, "+", " ") input = string.gsub (input, "%%(%x%x)", function(h) return string.char(checknumber(h,16)) end) input = string.gsub (input, "\r\n", "\n") return inputendfunction string.utf8len(input) local len = string.len(input) local left = len local cnt = 0 local arr = {0, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc} while left ~= 0 do local tmp = string.byte(input, -left) local i = #arr while arr[i] do if tmp >= arr[i] then left = left - i break end i = i - 1 end cnt = cnt + 1 end return cntendfunction string.formatnumberthousands(num) local formatted = tostring(checknumber(num)) local k while true do formatted, k = string.gsub(formatted, "^(-?%d+)(%d%d%d)", '%1,%2') if k == 0 then break end end return formattedend阅读全文
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