kc3-lang/SDL/premake/util/sdl_depends.lua

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• Hash : 24c86b55
  Author :
  Date : 2014-09-11T19:24:42
  

  [X11] Reconcile logical keyboard state with physical state on FocusIn since the window system doesn't do it for us like other platforms. This prevents sticky keys and missed keys when going in and out of focus, for example Alt would appear to stick if switching away from an SDL app with Alt-Tab and had to be pressed again. CR: Sam

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• premake/util/sdl_depends.lua

• -- Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
  --
  -- This software is provided 'as-is', without any express or implied
  -- warranty.  In no event will the authors be held liable for any damages
  -- arising from the use of this software.
  --
  -- Permission is granted to anyone to use this software for any purpose,
  -- including commercial applications, and to alter it and redistribute it
  -- freely.
  --
  -- Meta-build system using premake created and maintained by
  -- Benjamin Henning <b.henning@digipen.edu>
  
  -- This is kept just for windows because the other platforms use different means
  -- for determining dependence or compatibility.
  
  --[[
  sdl_depends.lua
  
  	This file simply contains a function for determining whether a dependency
  	exists on the Windows platform, given a possible environmental variable,
  	delimited search paths, and a main and/or sub-directory paths for more
  	elaborate pattern matching.
  ]]
  
  -- find_dependency_dir_windows(env, main_search_path, main_dir_path)
  --   Attempt to resolve a dependency (true or false) folder based on either an
  --   environmental variable, start search path, or both. If both are present,
  --   the environmental variable will be preferred. If neither are present, this
  --   function returns false.
  --
  --   Arguments:
  --     env                The name of the environmental variable to treat as a path
  --     main_search_paths  Paths to look for the main directory in
  --     main_dir_path      The a path that must be contained between main_search_path and sub_dir_path
  --     sub_dir_path       The path of the directories that should exist at the searched path
  function find_dependency_dir_windows(env, main_search_paths, main_dir_path, sub_dir_path)
  	if not os.is("windows") then -- if not windows, then fail
  		return false
  	end
  	if env == nil and (main_search_paths == nil or #main_search_paths == 0) then
  		return false
  	end
  	local env_path = nil
  	local main_path = nil
  	if env ~= nil then env_path = os.getenv(env) end
  	local search_table = { n = 0 }
  	if main_search_paths ~= nil then
  		for k,main_search_path in ipairs(explode(main_search_paths, ";")) do
  			local directories = os.matchdirs(main_search_path .. "/**" .. main_dir_path .. "*")
  			for k,v in pairs(directories) do
  				table.insert(search_table, v)
  			end
  		end
  	end
  	if env_path ~= nil then table.insert(search_table, env_path) end
  	local search_path = table.concat(search_table, ";")
  	local result_path = os.dirpathsearch(sub_dir_path, search_path, ";")
  	if result_path == nil then
  		return false
  	end
  	local found_dir = os.isdir(result_path)
  	local abs_path = path.getabsolute(result_path)
  	if found_dir and env_path ~= nil then
  		abs_path = abs_path:gsub("\\", "/")
  		env_path = env_path:gsub("\\", "/")
  		local pos = abs_path:indexOf(env_path)
  		if pos ~= nil then
  			abs_path = abs_path:sub(1, pos - 1) .. "$(" .. env .. ")/" .. abs_path:sub(pos + #env_path)
  		end
  	end
  	-- we want the path in terms of '/'
  	return found_dir, abs_path
  end
  

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