From 15564223e8a1baf02bc1d0ac035134c01b3af604 Mon Sep 17 00:00:00 2001
From: Diego Duclos <cncfanatics@debian.mshome>
Date: Tue, 26 Aug 2008 20:21:24 +0200
Subject: [PATCH] Add LibStub

---
 libs/LibStub/LibStub.lua | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 libs/LibStub/LibStub.toc |  9 +++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 libs/LibStub/LibStub.lua
 create mode 100644 libs/LibStub/LibStub.toc

diff --git a/libs/LibStub/LibStub.lua b/libs/LibStub/LibStub.lua
new file mode 100644
index 0000000..5d33968
--- /dev/null
+++ b/libs/LibStub/LibStub.lua
@@ -0,0 +1,51 @@
+-- $Id: LibStub.lua 48018 2007-09-03 01:50:17Z mikk $
+-- LibStub is a simple versioning stub meant for use in Libraries.  http://www.wowace.com/wiki/LibStub for more info
+-- LibStub is hereby placed in the Public Domain
+-- Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel, joshborke
+local LIBSTUB_MAJOR, LIBSTUB_MINOR = "LibStub", 2  -- NEVER MAKE THIS AN SVN REVISION! IT NEEDS TO BE USABLE IN ALL REPOS!
+local LibStub = _G[LIBSTUB_MAJOR]
+
+-- Check to see is this version of the stub is obsolete
+if not LibStub or LibStub.minor < LIBSTUB_MINOR then
+	LibStub = LibStub or {libs = {}, minors = {} }
+	_G[LIBSTUB_MAJOR] = LibStub
+	LibStub.minor = LIBSTUB_MINOR
+	
+	-- LibStub:NewLibrary(major, minor)
+	-- major (string) - the major version of the library
+	-- minor (string or number ) - the minor version of the library
+	-- 
+	-- returns nil if a newer or same version of the lib is already present
+	-- returns empty library object or old library object if upgrade is needed
+	function LibStub:NewLibrary(major, minor)
+		assert(type(major) == "string", "Bad argument #2 to `NewLibrary' (string expected)")
+		minor = assert(tonumber(strmatch(minor, "%d+")), "Minor version must either be a number or contain a number.")
+		
+		local oldminor = self.minors[major]
+		if oldminor and oldminor >= minor then return nil end
+		self.minors[major], self.libs[major] = minor, self.libs[major] or {}
+		return self.libs[major], oldminor
+	end
+	
+	-- LibStub:GetLibrary(major, [silent])
+	-- major (string) - the major version of the library
+	-- silent (boolean) - if true, library is optional, silently return nil if its not found
+	--
+	-- throws an error if the library can not be found (except silent is set)
+	-- returns the library object if found
+	function LibStub:GetLibrary(major, silent)
+		if not self.libs[major] and not silent then
+			error(("Cannot find a library instance of %q."):format(tostring(major)), 2)
+		end
+		return self.libs[major], self.minors[major]
+	end
+	
+	-- LibStub:IterateLibraries()
+	-- 
+	-- Returns an iterator for the currently registered libraries
+	function LibStub:IterateLibraries() 
+		return pairs(self.libs) 
+	end
+	
+	setmetatable(LibStub, { __call = LibStub.GetLibrary })
+end
diff --git a/libs/LibStub/LibStub.toc b/libs/LibStub/LibStub.toc
new file mode 100644
index 0000000..4d9130c
--- /dev/null
+++ b/libs/LibStub/LibStub.toc
@@ -0,0 +1,9 @@
+## Interface: 20400
+## Title: Lib: LibStub
+## Notes: Universal Library Stub
+## Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel
+## X-Website: http://jira.wowace.com/browse/LS
+## X-Category: Library
+## X-License: Public Domain	
+
+LibStub.lua
-- 
2.11.4.GIT