Xiiph@0: -- LibStub is a simple versioning stub meant for use in Libraries. http://www.wowace.com/wiki/LibStub for more info Xiiph@0: -- LibStub is hereby placed in the Public Domain Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel, joshborke Xiiph@0: local LIBSTUB_MAJOR, LIBSTUB_MINOR = "LibStub", 2 -- NEVER MAKE THIS AN SVN REVISION! IT NEEDS TO BE USABLE IN ALL REPOS! Xiiph@0: local LibStub = _G[LIBSTUB_MAJOR] Xiiph@0: Xiiph@0: if not LibStub or LibStub.minor < LIBSTUB_MINOR then Xiiph@0: LibStub = LibStub or {libs = {}, minors = {} } Xiiph@0: _G[LIBSTUB_MAJOR] = LibStub Xiiph@0: LibStub.minor = LIBSTUB_MINOR Xiiph@0: Xiiph@0: function LibStub:NewLibrary(major, minor) Xiiph@0: assert(type(major) == "string", "Bad argument #2 to `NewLibrary' (string expected)") Xiiph@0: minor = assert(tonumber(strmatch(minor, "%d+")), "Minor version must either be a number or contain a number.") Xiiph@0: Xiiph@0: local oldminor = self.minors[major] Xiiph@0: if oldminor and oldminor >= minor then return nil end Xiiph@0: self.minors[major], self.libs[major] = minor, self.libs[major] or {} Xiiph@0: return self.libs[major], oldminor Xiiph@0: end Xiiph@0: Xiiph@0: function LibStub:GetLibrary(major, silent) Xiiph@0: if not self.libs[major] and not silent then Xiiph@0: error(("Cannot find a library instance of %q."):format(tostring(major)), 2) Xiiph@0: end Xiiph@0: return self.libs[major], self.minors[major] Xiiph@0: end Xiiph@0: Xiiph@0: function LibStub:IterateLibraries() return pairs(self.libs) end Xiiph@0: setmetatable(LibStub, { __call = LibStub.GetLibrary }) Xiiph@0: end