--- /dev/null
+--
+-- Compat-5.1
+-- Copyright Kepler Project 2004-2006 (http://www.keplerproject.org/compat)
+-- According to Lua 5.1
+-- $Id: compat-5.1.lua,v 1.22 2006/02/20 21:12:47 carregal Exp $
+--
+
+_COMPAT51 = "Compat-5.1 R5"
+
+local LUA_DIRSEP = '/'
+local LUA_OFSEP = '_'
+local OLD_LUA_OFSEP = ''
+local POF = 'luaopen_'
+local LUA_PATH_MARK = '?'
+local LUA_IGMARK = ':'
+
+local assert, error, getfenv, ipairs, loadfile, loadlib, pairs, setfenv, setmetatable, type = assert, error, getfenv, ipairs, loadfile, loadlib, pairs, setfenv, setmetatable, type
+local find, format, gfind, gsub, sub = string.find, string.format, string.gfind, string.gsub, string.sub
+
+--
+-- avoid overwriting the package table if it's already there
+--
+package = package or {}
+local _PACKAGE = package
+
+package.path = LUA_PATH or os.getenv("LUA_PATH") or
+ ("./?.lua;" ..
+ "/usr/local/share/lua/5.0/?.lua;" ..
+ "/usr/local/share/lua/5.0/?/?.lua;" ..
+ "/usr/local/share/lua/5.0/?/init.lua" )
+
+package.cpath = LUA_CPATH or os.getenv("LUA_CPATH") or
+ "./?.so;" ..
+ "./l?.so;" ..
+ "/usr/local/lib/lua/5.0/?.so;" ..
+ "/usr/local/lib/lua/5.0/l?.so"
+
+--
+-- make sure require works with standard libraries
+--
+package.loaded = package.loaded or {}
+package.loaded.debug = debug
+package.loaded.string = string
+package.loaded.math = math
+package.loaded.io = io
+package.loaded.os = os
+package.loaded.table = table
+package.loaded.base = _G
+package.loaded.coroutine = coroutine
+local _LOADED = package.loaded
+
+--
+-- avoid overwriting the package.preload table if it's already there
+--
+package.preload = package.preload or {}
+local _PRELOAD = package.preload
+
+
+--
+-- looks for a file `name' in given path
+--
+local function findfile (name, pname)
+ name = gsub (name, "%.", LUA_DIRSEP)
+ local path = _PACKAGE[pname]
+ assert (type(path) == "string", format ("package.%s must be a string", pname))
+ for c in gfind (path, "[^;]+") do
+ c = gsub (c, "%"..LUA_PATH_MARK, name)
+ local f = io.open (c)
+ if f then
+ f:close ()
+ return c
+ end
+ end
+ return nil -- not found
+end
+
+
+--
+-- check whether library is already loaded
+--
+local function loader_preload (name)
+ assert (type(name) == "string", format (
+ "bad argument #1 to `require' (string expected, got %s)", type(name)))
+ assert (type(_PRELOAD) == "table", "`package.preload' must be a table")
+ return _PRELOAD[name]
+end
+
+
+--
+-- Lua library loader
+--
+local function loader_Lua (name)
+ assert (type(name) == "string", format (
+ "bad argument #1 to `require' (string expected, got %s)", type(name)))
+ local filename = findfile (name, "path")
+ if not filename then
+ return false
+ end
+ local f, err = loadfile (filename)
+ if not f then
+ error (format ("error loading module `%s' (%s)", name, err))
+ end
+ return f
+end
+
+
+local function mkfuncname (name)
+ name = gsub (name, "^.*%"..LUA_IGMARK, "")
+ name = gsub (name, "%.", LUA_OFSEP)
+ return POF..name
+end
+
+local function old_mkfuncname (name)
+ --name = gsub (name, "^.*%"..LUA_IGMARK, "")
+ name = gsub (name, "%.", OLD_LUA_OFSEP)
+ return POF..name
+end
+
+--
+-- C library loader
+--
+local function loader_C (name)
+ assert (type(name) == "string", format (
+ "bad argument #1 to `require' (string expected, got %s)", type(name)))
+ local filename = findfile (name, "cpath")
+ if not filename then
+ return false
+ end
+ local funcname = mkfuncname (name)
+ local f, err = loadlib (filename, funcname)
+ if not f then
+ funcname = old_mkfuncname (name)
+ f, err = loadlib (filename, funcname)
+ if not f then
+ error (format ("error loading module `%s' (%s)", name, err))
+ end
+ end
+ return f
+end
+
+
+local function loader_Croot (name)
+ local p = gsub (name, "^([^.]*).-$", "%1")
+ if p == "" then
+ return
+ end
+ local filename = findfile (p, "cpath")
+ if not filename then
+ return
+ end
+ local funcname = mkfuncname (name)
+ local f, err, where = loadlib (filename, funcname)
+ if f then
+ return f
+ elseif where ~= "init" then
+ error (format ("error loading module `%s' (%s)", name, err))
+ end
+end
+
+-- create `loaders' table
+package.loaders = package.loaders or { loader_preload, loader_Lua, loader_C, loader_Croot, }
+local _LOADERS = package.loaders
+
+
+--
+-- iterate over available loaders
+--
+local function load (name, loaders)
+ -- iterate over available loaders
+ assert (type (loaders) == "table", "`package.loaders' must be a table")
+ for i, loader in ipairs (loaders) do
+ local f = loader (name)
+ if f then
+ return f
+ end
+ end
+ error (format ("module `%s' not found", name))
+end
+
+-- sentinel
+local sentinel = function () end
+
+--
+-- new require
+--
+function _G.require (modname)
+ assert (type(modname) == "string", format (
+ "bad argument #1 to `require' (string expected, got %s)", type(name)))
+ local p = _LOADED[modname]
+ if p then -- is it there?
+ if p == sentinel then
+ error (format ("loop or previous error loading module '%s'", modname))
+ end
+ return p -- package is already loaded
+ end
+ local init = load (modname, _LOADERS)
+ _LOADED[modname] = sentinel
+ local actual_arg = _G.arg
+ _G.arg = { modname }
+ local res = init (modname)
+ if res then
+ _LOADED[modname] = res
+ end
+ _G.arg = actual_arg
+ if _LOADED[modname] == sentinel then
+ _LOADED[modname] = true
+ end
+ return _LOADED[modname]
+end
+
+
+-- findtable
+local function findtable (t, f)
+ assert (type(f)=="string", "not a valid field name ("..tostring(f)..")")
+ local ff = f.."."
+ local ok, e, w = find (ff, '(.-)%.', 1)
+ while ok do
+ local nt = rawget (t, w)
+ if not nt then
+ nt = {}
+ t[w] = nt
+ elseif type(t) ~= "table" then
+ return sub (f, e+1)
+ end
+ t = nt
+ ok, e, w = find (ff, '(.-)%.', e+1)
+ end
+ return t
+end
+
+--
+-- new package.seeall function
+--
+function _PACKAGE.seeall (module)
+ local t = type(module)
+ assert (t == "table", "bad argument #1 to package.seeall (table expected, got "..t..")")
+ local meta = getmetatable (module)
+ if not meta then
+ meta = {}
+ setmetatable (module, meta)
+ end
+ meta.__index = _G
+end
+
+
+--
+-- new module function
+--
+function _G.module (modname, ...)
+ local ns = _LOADED[modname]
+ if type(ns) ~= "table" then
+ ns = findtable (_G, modname)
+ if not ns then
+ error (string.format ("name conflict for module '%s'", modname))
+ end
+ _LOADED[modname] = ns
+ end
+ if not ns._NAME then
+ ns._NAME = modname
+ ns._M = ns
+ ns._PACKAGE = gsub (modname, "[^.]*$", "")
+ end
+ setfenv (2, ns)
+ for i, f in ipairs (arg) do
+ f (ns)
+ end
+end
projects / rrdtool.git / blobdiff