From 1fe083b59a0af901300ce454c360acf261fbee80 Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Sat, 13 Sep 2008 09:09:38 +0000
Subject: [PATCH] Backported UVL optimizations

---
 libs/uvl/luasrc/uvl.lua              | 689 +++++++++++++++++------------------
 libs/uvl/luasrc/uvl/datatypes.lua    |  27 +-
 libs/uvl/luasrc/uvl/dependencies.lua |  49 ++-
 libs/uvl/luasrc/uvl/errors.lua       |  24 +-
 libs/uvl/luasrc/uvl/validation.lua   |  20 +-
 5 files changed, 408 insertions(+), 401 deletions(-)

diff --git a/libs/uvl/luasrc/uvl.lua b/libs/uvl/luasrc/uvl.lua
index aada2e6c2..c75b9bd7d 100644
--- a/libs/uvl/luasrc/uvl.lua
+++ b/libs/uvl/luasrc/uvl.lua
@@ -19,22 +19,28 @@ $Id$
 -- @class	module
 -- @cstyle	instance
 
-module( "luci.uvl", package.seeall )
+local fs = require "luci.fs"
+local uci = require "luci.model.uci"
+local util = require "luci.util"
+local table = require "table"
+local string = require "string"
 
-require("luci.fs")
-require("luci.util")
-require("luci.model.uci")
-require("luci.uvl.errors")
-require("luci.uvl.datatypes")
-require("luci.uvl.validation")
-require("luci.uvl.dependencies")
+local require, pcall, ipairs, pairs = require, pcall, ipairs, pairs
+local type, error, tonumber, tostring = type, error, tonumber, tostring
+local unpack, loadfile = unpack, loadfile
 
+module "luci.uvl"
 
-TYPE_SCHEME   = 0x00
-TYPE_CONFIG   = 0x01
-TYPE_SECTION  = 0x02
-TYPE_OPTION   = 0x03
-TYPE_ENUM     = 0x04
+local ERR = require "luci.uvl.errors"
+local datatypes = require "luci.uvl.datatypes"
+local validation = require "luci.uvl.validation"
+local dependencies = require "luci.uvl.dependencies"
+
+local TYPE_SCHEME   = 0x00
+local TYPE_CONFIG   = 0x01
+local TYPE_SECTION  = 0x02
+local TYPE_OPTION   = 0x03
+local TYPE_ENUM     = 0x04
 
 --- Boolean; default true;
 -- treat sections found in config but not in scheme as error
@@ -55,7 +61,6 @@ STRICT_LIST_TYPE           = true
 
 local default_schemedir = "/lib/uci/schema"
 local default_savedir = "/tmp/.uvl"
-local ERR = luci.uvl.errors
 
 
 --- Object constructor
@@ -63,17 +68,17 @@ local ERR = luci.uvl.errors
 -- @name			UVL
 -- @param schemedir	Path to the scheme directory (optional)
 -- @return			Instance object
-UVL = luci.util.class()
+UVL = util.class()
 
 function UVL.__init__( self, schemedir )
 	self.schemedir	= schemedir or default_schemedir
 	self.packages	= { }
 	self.beenthere  = { }
 	self.depseen    = { }
-	self.uci		= luci.model.uci
-	self.err		= luci.uvl.errors
-	self.dep		= luci.uvl.dependencies
-	self.datatypes  = luci.uvl.datatypes
+	self.uci		= uci
+	self.err		= ERR
+	self.dep		= dependencies
+	self.datatypes  = datatypes
 end
 
 
@@ -108,19 +113,19 @@ function UVL.validate( self, config, section, option )
 end
 
 --- Validate given configuration.
--- @param config	Name of the configuration to validate
+-- @param cfg	Name of the configuration to validate
 -- @return			Boolean indicating whether the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate_config( self, config, uci )
+function UVL.validate_config( self, cfg, uci )
 
-	if not self.packages[config] then
-		local ok, err = self:read_scheme(config)
+	if not self.packages[cfg] then
+		local ok, err = self:read_scheme(cfg)
 		if not ok then
 			return false, err
 		end
 	end
 
-	local co = luci.uvl.config( self, uci or config, uci and config )
+	local co = config( self, uci or cfg, uci and cfg )
 	local sc = { }
 
 	self.beenthere = { }
@@ -140,7 +145,7 @@ function UVL.validate_config( self, config, uci )
 		end
 	end
 
-	for k, v in pairs( self.packages[config].sections ) do
+	for k, v in pairs( self.packages[cfg].sections ) do
 		sc[k] = 0
 		_uci_foreach( k,
 			function(s)
@@ -158,7 +163,7 @@ function UVL.validate_config( self, config, uci )
 		end
 	end
 
-	for _, k in ipairs(luci.util.keys(sc)) do
+	for _, k in ipairs(util.keys(sc)) do
 		local so = co:section(k)
 		if so:scheme('required') and sc[k] == 0 then
 			co:error(ERR.SECT_REQUIRED(so))
@@ -175,16 +180,16 @@ end
 -- @param section	Name of the section to validate
 -- @return			Boolean indicating whether the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate_section( self, config, section, uci )
+function UVL.validate_section( self, cfg, section, uci )
 
-	if not self.packages[config] then
-		local ok, err = self:read_scheme( config )
+	if not self.packages[cfg] then
+		local ok, err = self:read_scheme( cfg )
 		if not ok then
 			return false, err
 		end
 	end
 
-	local co = luci.uvl.config( self, uci or config, uci and config )
+	local co = config( self, uci or cfg, uci and cfg )
 	local so = co:section( section )
 
 	self.beenthere = { }
@@ -207,16 +212,16 @@ end
 -- @param option	Name of the option to validate
 -- @return			Boolean indicating whether the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate_option( self, config, section, option, uci )
+function UVL.validate_option( self, cfg, section, option, uci )
 
-	if not self.packages[config] then
-		local ok, err = self:read_scheme( config )
+	if not self.packages[cfg] then
+		local ok, err = self:read_scheme( cfg )
 		if not ok then
 			return false, err
 		end
 	end
 
-	local co = luci.uvl.config( self, uci or config, uci and config )
+	local co = config( self, uci or cfg, uci and cfg )
 	local so = co:section( section )
 	local oo = so:option( option )
 
@@ -255,7 +260,7 @@ function UVL._validate_section( self, section )
 			end
 		end
 
-		local ok, err = luci.uvl.dependencies.check( self, section )
+		local ok, err = dependencies.check( self, section )
 		if not ok then
 			section:error(err)
 		end
@@ -301,8 +306,8 @@ function UVL._validate_option( self, option, nodeps )
 				for _, v in ipairs(config_values) do
 					if not scheme_values[v] then
 						return false, option:error( ERR.OPT_BADVALUE(
-							option, { v, luci.util.serialize_data(
-								luci.util.keys(scheme_values)
+							option, { v, util.serialize_data(
+								util.keys(scheme_values)
 							) }
 						) )
 					end
@@ -329,16 +334,16 @@ function UVL._validate_option( self, option, nodeps )
 					return false, option:error(ERR.OPT_DATATYPE(option, dt))
 				end
 			end
-		end
 
-		if not nodeps then
-			local ok, err = luci.uvl.dependencies.check( self, option )
-			if not ok then
-				option:error(err)
+			if not nodeps then
+				local ok, err = dependencies.check( self, option )
+				if not ok then
+					option:error(err)
+				end
 			end
 		end
 
-		local ok, err = luci.uvl.validation.check( self, option )
+		local ok, err = validation.check( self, option )
 		if not ok and STRICT_EXTERNAL_VALIDATORS then
 			return false, option:error(err)
 		end
@@ -350,342 +355,328 @@ end
 --- Find all parts of given scheme and construct validation tree.
 -- This is normally done on demand, so you don't have to call this function
 -- by yourself.
--- @param scheme	Name of the scheme to parse
+-- @param shm	Name of the scheme to parse
 -- @param alias		Create an alias for the loaded scheme
-function UVL.read_scheme( self, scheme, alias )
+function UVL.read_scheme( self, shm, alias )
 
-	local so = luci.uvl.scheme( self, scheme )
-	local bc = "%s/bytecode/%s.lua" %{ self.schemedir, scheme }
+	local so = scheme( self, shm )
+	local bc = "%s/bytecode/%s.lua" %{ self.schemedir, shm }
 
-	if not luci.fs.access(bc) then
-		local schemes = { }
-		local files = luci.fs.glob(self.schemedir .. '/*/' .. scheme)
+	if not fs.access(bc) then
+		local files = fs.glob(self.schemedir .. '/*/' .. shm)
 
 		if files then
+			local ok, err
 			for i, file in ipairs( files ) do
-				if not luci.fs.access(file) then
+				if not fs.access(file) then
 					return false, so:error(ERR.SME_READ(so,file))
 				end
 
-				local uci = luci.model.uci.cursor( luci.fs.dirname(file), default_savedir )
+				local uci = uci.cursor( fs.dirname(file), default_savedir )
 
-				local sd, err = uci:get_all( luci.fs.basename(file) )
+				local sname = fs.basename(file)
+				local sd, err = uci:load( sname )
 
 				if not sd then
 					return false, ERR.UCILOAD(so, err)
 				end
 
-				table.insert( schemes, sd )
+				ok, err = pcall(function()
+					uci:foreach(sname, "package", function(s)
+						self:_parse_package(so, s[".name"], s)
+					end)
+					uci:foreach(sname, "section", function(s)
+						self:_parse_section(so, s[".name"], s)
+					end)
+					uci:foreach(sname, "variable", function(s)
+						self:_parse_var(so, s[".name"], s)
+					end)
+					uci:foreach(sname, "enum", function(s)
+						self:_parse_enum(so, s[".name"], s)
+					end)
+
+				end)
 			end
 
-			local ok, err = self:_read_scheme_parts( so, schemes )
-			if ok and alias then self.packages[alias] = self.packages[scheme] end
-			return ok, err
+			if ok and alias then self.packages[alias] = self.packages[shm] end
+			return ok and self, err
 		else
 			return false, so:error(ERR.SME_FIND(so, self.schemedir))
 		end
 	else
 		local sc = loadfile(bc)
 		if sc then
-			self.packages[scheme] = sc()
+			self.packages[shm] = sc()
 			return true
 		else
 			return false, so:error(ERR.SME_READ(so,bc))
-		end	 
+		end
 	end
 end
 
--- Process all given parts and construct validation tree
-function UVL._read_scheme_parts( self, scheme, schemes )
-
-	-- helper function to check for required fields
-	local function _req( t, n, c, r )
-		for i, v in ipairs(r) do
-			if not c[v] then
-				local p, o = scheme:sid(), nil
-
-				if t == TYPE_SECTION then
-					o = section( scheme, nil, p, n )
-				elseif t == TYPE_OPTION then
-					o = option( scheme, nil, p, '(nil)', n )
-				elseif t == TYPE_ENUM then
-					o = enum( scheme, nil, p, '(nil)', '(nil)', n )
-				end
-
-				return false, ERR.SME_REQFLD(o,v)
+-- helper function to check for required fields
+local function _req( t, n, c, r )
+	for i, v in ipairs(r) do
+		if not c[v] then
+			local p, o = scheme:sid(), nil
+
+			if t == TYPE_SECTION then
+				o = section( scheme, nil, p, n )
+			elseif t == TYPE_OPTION then
+				o = option( scheme, nil, p, '(nil)', n )
+			elseif t == TYPE_ENUM then
+				o = enum( scheme, nil, p, '(nil)', '(nil)', n )
 			end
-		end
-		return true
-	end
 
-	-- helper function to validate references
-	local function _ref( c, t )
-		local k, n
-		if c == TYPE_SECTION then
-			k = "package"
-			n = 1
-		elseif c == TYPE_OPTION then
-			k = "section"
-			n = 2
-		elseif c == TYPE_ENUM then
-			k = "variable"
-			n = 3
+			return false, ERR.SME_REQFLD(o,v)
 		end
+	end
+	return true
+end
 
-		local r = luci.util.split( t[k], "." )
-		r[1] = ( #r[1] > 0 and r[1] or scheme:sid() )
-
-		if #r ~= n then
-			return false, ERR.SME_BADREF(scheme, k)
-		end
+-- helper function to validate references
+local function _ref( c, t )
+	local r, k, n = {}
+	if c == TYPE_SECTION then
+		k = "package"
+		n = 1
+	elseif c == TYPE_OPTION then
+		k = "section"
+		n = 2
+	elseif c == TYPE_ENUM then
+		k = "variable"
+		n = 3
+	end
 
-		return r
+	for o in t[k]:gmatch("[^.]+") do
+		r[#r+1] = o
 	end
+	r[1] = ( #r[1] > 0 and r[1] or scheme:sid() )
 
-	-- helper function to read bools
-	local function _bool( v )
-		return ( v == "true" or v == "yes" or v == "on" or v == "1" )
+	if #r ~= n then
+		return false, ERR.SME_BADREF(scheme, k)
 	end
 
+	return r
+end
 
-	local ok, err
+-- helper function to read bools
+local function _bool( v )
+	return ( v == "true" or v == "yes" or v == "on" or v == "1" )
+end
 
-	-- Step 0: get package meta information
-	for i, conf in ipairs( schemes ) do
-		for k, v in pairs( conf ) do
-			if v['.type'] == 'package' then
-				self.packages[scheme:sid()] =
-					self.packages[scheme:sid()] or {
-						["name"]      = scheme:sid();
-						["sections"]  = { };
-						["variables"] = { };
-					}
+-- Step 0: get package meta information
+function UVL._parse_package(self, scheme, k, v)
+	local sid = scheme:sid()
+	local pkg = self.packages[sid] or {
+		["name"]      = sid;
+		["sections"]  = { };
+		["variables"] = { };
+	}
 
-				for k, v2 in pairs(v) do
-					if k == "title" or k == "description" then
-						self.packages[scheme:sid()][k] = v2
-					end
+	pkg.title = v.title
+	pkg.description = v.description
+
+	self.packages[sid] = pkg
+end
+
+-- Step 1: get all sections
+function UVL._parse_section(self, scheme, k, v)
+	local ok, err = _req( TYPE_SECTION, k, v, { "name", "package" } )
+	if err then error(scheme:error(err)) end
+
+	local r, err = _ref( TYPE_SECTION, v )
+	if err then error(scheme:error(err)) end
+
+	local p = self.packages[r[1]] or {
+		["name"]      = r[1];
+		["sections"]  = { };
+		["variables"] = { };
+	}
+	p.sections[v.name]  = p.sections[v.name]  or { }
+	p.variables[v.name] = p.variables[v.name] or { }
+	self.packages[r[1]] = p
+
+	local s  = p.sections[v.name]
+	local so = scheme:section(v.name)
+
+	for k, v2 in pairs(v) do
+		if k ~= "name" and k ~= "package" and k:sub(1,1) ~= "." then
+			if k == "depends" then
+				s.depends = self:_read_dependency( v2, s.depends )
+				if not s.depends then
+					return false, scheme:error(
+						ERR.SME_BADDEP(so, util.serialize_data(s.depends))
+					)
 				end
+			elseif k == "dynamic" or k == "unique" or
+			       k == "required" or k == "named"
+			then
+				s[k] = _bool(v2)
+			else
+				s[k] = v2
 			end
 		end
 	end
 
-	-- Step 1: get all sections
-	for i, conf in ipairs( schemes ) do
-		for k, v in pairs( conf ) do
-			if v['.type'] == 'section' then
-
-				ok, err = _req( TYPE_SECTION, k, v, { "name", "package" } )
-				if err then return false, scheme:error(err) end
-
-				local r, err = _ref( TYPE_SECTION, v )
-				if err then return false, scheme:error(err) end
-
-				self.packages[r[1]] =
-					self.packages[r[1]] or {
-						["name"]      = r[1];
-						["sections"]  = { };
-						["variables"] = { };
-					}
-
-				local p = self.packages[r[1]]
-					  p.sections[v.name]  = p.sections[v.name]  or { }
-					  p.variables[v.name] = p.variables[v.name] or { }
-
-				local s  = p.sections[v.name]
-				local so = scheme:section(v.name)
-
-				for k, v2 in pairs(v) do
-					if k ~= "name" and k ~= "package" and k:sub(1,1) ~= "." then
-						if k == "depends" then
-							s.depends = self:_read_dependency( v2, s.depends )
-							if not s.depends then
-								return false, scheme:error(
-									ERR.SME_BADDEP(so, luci.util.serialize_data(s.depends))
-								)
-							end
-						elseif k == "dynamic" or k == "unique" or
-						       k == "required" or k == "named"
-						then
-							s[k] = _bool(v2)
-						else
-							s[k] = v2
-						end
-					end
-				end
+	s.dynamic  = s.dynamic  or false
+	s.unique   = s.unique   or false
+	s.required = s.required or false
+	s.named    = s.named    or false
+end
 
-				s.dynamic  = s.dynamic  or false
-				s.unique   = s.unique   or false
-				s.required = s.required or false
-				s.named    = s.named    or false
-			end
-		end
-	end
 
 	-- Step 2: get all variables
-	for i, conf in ipairs( schemes ) do
-		for k, v in pairs( conf ) do
-			if v['.type'] == "variable" then
+function UVL._parse_var(self, scheme, k, v)
+	local ok, err = _req( TYPE_OPTION, k, v, { "name", "section" } )
+	if err then error(scheme:error(err)) end
+
+	local r, err = _ref( TYPE_OPTION, v )
+	if err then error(scheme:error(err)) end
+
+	local p = self.packages[r[1]]
+	if not p then
+		error(scheme:error(
+			ERR.SME_VBADPACK({scheme:sid(), '', v.name}, r[1])
+		))
+	end
 
-				ok, err = _req( TYPE_OPTION, k, v, { "name", "section" } )
-				if err then return false, scheme:error(err) end
+	local s = p.variables[r[2]]
+	if not s then
+		error(scheme:error(
+			ERR.SME_VBADSECT({scheme:sid(), '', v.name}, r[2])
+		))
+	end
 
-				local r, err = _ref( TYPE_OPTION, v )
-				if err then return false, scheme:error(err) end
+	s[v.name] = s[v.name] or { }
 
-				local p = self.packages[r[1]]
-				if not p then
-					return false, scheme:error(
-						ERR.SME_VBADPACK({scheme:sid(), '', v.name}, r[1])
-					)
-				end
+	local t  = s[v.name]
+	local so = scheme:section(r[2])
+	local to = so:option(v.name)
 
-				local s = p.variables[r[2]]
-				if not s then
-					return false, scheme:error(
-						ERR.SME_VBADSECT({scheme:sid(), '', v.name}, r[2])
-					)
+	for k, v2 in pairs(v) do
+		if k ~= "name" and k ~= "section" and k:sub(1,1) ~= "." then
+			if k == "depends" then
+				t.depends = self:_read_dependency( v2, t.depends )
+				if not t.depends then
+					error(scheme:error(so:error(
+						ERR.SME_BADDEP(to, util.serialize_data(v2))
+					)))
 				end
-
-				s[v.name] = s[v.name] or { }
-
-				local t  = s[v.name]
-				local so = scheme:section(r[2])
-				local to = so:option(v.name)
-
-				for k, v2 in pairs(v) do
-					if k ~= "name" and k ~= "section" and k:sub(1,1) ~= "." then
-						if k == "depends" then
-							t.depends = self:_read_dependency( v2, t.depends )
-							if not t.depends then
-								return false, scheme:error(so:error(
-									ERR.SME_BADDEP(to, luci.util.serialize_data(v2))
-								))
-							end
-						elseif k == "validator" then
-							t.validators = self:_read_validator( v2, t.validators )
-							if not t.validators then
-								return false, scheme:error(so:error(
-									ERR.SME_BADVAL(to, luci.util.serialize_data(v2))
-								))
-							end
-						elseif k == "valueof" then
-							local values, err = self:_read_reference( v2 )
-							if err then
-								return false, scheme:error(so:error(
-									ERR.REFERENCE(to, luci.util.serialize_data(v2)):child(err)
-								))
-							end
-							t.type   = "reference"
-							t.values = values
-						elseif k == "required" then
-							t[k] = _bool(v2)
-						else
-							t[k] = t[k] or v2
-						end
-					end
+			elseif k == "validator" then
+				t.validators = self:_read_validator( v2, t.validators )
+				if not t.validators then
+					error(scheme:error(so:error(
+						ERR.SME_BADVAL(to, util.serialize_data(v2))
+					)))
 				end
-
-				t.type     = t.type     or "variable"
-				t.datatype = t.datatype or "string"
-				t.required = t.required or false
+			elseif k == "valueof" then
+				local values, err = self:_read_reference( v2 )
+				if err then
+					error(scheme:error(so:error(
+						ERR.REFERENCE(to, util.serialize_data(v2)):child(err)
+					)))
+				end
+				t.type   = "reference"
+				t.values = values
+				t.valueof = type(v2) == "table" and v2 or {v2}
+			elseif k == "required" then
+				t[k] = _bool(v2)
+			else
+				t[k] = t[k] or v2
 			end
 		end
 	end
 
-	-- Step 3: get all enums
-	for i, conf in ipairs( schemes ) do
-		for k, v in pairs( conf ) do
-			if v['.type'] == "enum" then
+	t.type     = t.type     or "variable"
+	t.datatype = t.datatype or "string"
+	t.required = t.required or false
+end
 
-				ok, err = _req( TYPE_ENUM, k, v, { "value", "variable" } )
-				if err then return false, scheme:error(err) end
+-- Step 3: get all enums
+function UVL._parse_enum(self, scheme, k, v)
+	local ok, err = _req( TYPE_ENUM, k, v, { "value", "variable" } )
+	if err then error(scheme:error(err)) end
 
-				local r, err = _ref( TYPE_ENUM, v )
-				if err then return false, scheme:error(err) end
+	local r, err = _ref( TYPE_ENUM, v )
+	if err then error(scheme:error(err)) end
 
-				local p = self.packages[r[1]]
-				if not p then
-					return false, scheme:error(
-						ERR.SME_EBADPACK({scheme:sid(), '', '', v.value}, r[1])
-					)
-				end
+	local p = self.packages[r[1]]
+	if not p then
+		error(scheme:error(
+			ERR.SME_EBADPACK({scheme:sid(), '', '', v.value}, r[1])
+		))
+	end
 
-				local s = p.variables[r[2]]
-				if not s then
-					return false, scheme:error(
-						ERR.SME_EBADSECT({scheme:sid(), '', '', v.value}, r[2])
-					)
-				end
+	local s = p.variables[r[2]]
+	if not s then
+		error(scheme:error(
+			ERR.SME_EBADSECT({scheme:sid(), '', '', v.value}, r[2])
+		))
+	end
 
-				local t = s[r[3]]
-				if not t then
-					return false, scheme:error(
-						ERR.SME_EBADOPT({scheme:sid(), '', '', v.value}, r[3])
-					)
-				end
+	local t = s[r[3]]
+	if not t then
+		error(scheme:error(
+			ERR.SME_EBADOPT({scheme:sid(), '', '', v.value}, r[3])
+		))
+	end
 
 
-				local so = scheme:section(r[2])
-				local oo = so:option(r[3])
-				local eo = oo:enum(v.value)
+	local so = scheme:section(r[2])
+	local oo = so:option(r[3])
+	local eo = oo:enum(v.value)
 
-				if t.type ~= "enum" then
-					return false, scheme:error(ERR.SME_EBADTYPE(eo))
-				end
+	if t.type ~= "enum" and t.type ~= "reference" then
+		error(scheme:error(ERR.SME_EBADTYPE(eo)))
+	end
 
-				if not t.values then
-					t.values = { [v.value] = v.title or v.value }
-				else
-					t.values[v.value] = v.title or v.value
-				end
+	if not t.values then
+		t.values = { [v.value] = v.title or v.value }
+	else
+		t.values[v.value] = v.title or v.value
+	end
 
-				if not t.enum_depends then
-					t.enum_depends = { }
-				end
+	if not t.enum_depends then
+		t.enum_depends = { }
+	end
 
-				if v.default then
-					if t.default then
-						return false, scheme:error(ERR.SME_EBADDEF(eo))
-					end
-					t.default = v.value
-				end
+	if v.default then
+		if t.default then
+			error(scheme:error(ERR.SME_EBADDEF(eo)))
+		end
+		t.default = v.value
+	end
 
-				if v.depends then
-					t.enum_depends[v.value] = self:_read_dependency(
-						v.depends, t.enum_depends[v.value]
-					)
+	if v.depends then
+		t.enum_depends[v.value] = self:_read_dependency(
+			v.depends, t.enum_depends[v.value]
+		)
 
-					if not t.enum_depends[v.value] then
-						return false, scheme:error(so:error(oo:error(
-							ERR.SME_BADDEP(eo, luci.util.serialize_data(v.depends))
-						)))
-					end
-				end
-			end
+		if not t.enum_depends[v.value] then
+			error(scheme:error(so:error(oo:error(
+				ERR.SME_BADDEP(eo, util.serialize_data(v.depends))
+			))))
 		end
 	end
-
-	return self
 end
 
 -- Read a dependency specification
 function UVL._read_dependency( self, values, deps )
-	local expr = "%$?[a-zA-Z0-9_]+"
+	local expr = "%$?[%w_]+"
 	if values then
 		values = ( type(values) == "table" and values or { values } )
 		for _, value in ipairs(values) do
-			local parts     = luci.util.split( value, "%s*,%s*", nil, true )
 			local condition = { }
-			for i, val in ipairs(parts) do
-				local k, v = unpack(luci.util.split(val, "%s*=%s*", nil, true))
+			for val in value:gmatch("[^,]+") do
+				local k, e, v = val:match("%s*([%w$_.]+)%s*(=?)%s*(.*)")
 
 				if k and (
 					k:match("^"..expr.."%."..expr.."%."..expr.."$") or
 					k:match("^"..expr.."%."..expr.."$") or
 					k:match("^"..expr.."$")
 				) then
-					condition[k] = v or true
+					condition[k] = (e == '=') and v or true
 				else
 					return nil
 				end
@@ -694,7 +685,7 @@ function UVL._read_dependency( self, values, deps )
 			if not deps then
 				deps = { condition }
 			else
-				table.insert( deps, condition )
+				deps[#deps+1] = condition
 			end
 		end
 	end
@@ -719,7 +710,7 @@ function UVL._read_validator( self, values, validators )
 					local values = { ... }
 					for _, v in ipairs(values) do
 						local ok, match =
-							luci.util.copcall( string.match, v, pattern )
+							pcall( string.match, v, pattern )
 
 						if not ok then
 							return false, match
@@ -738,7 +729,7 @@ function UVL._read_validator( self, values, validators )
 				if not validators then
 					validators = { validator }
 				else
-					table.insert( validators, validator )
+					validators[#validators+1] = validator
 				end
 			else
 				return nil
@@ -755,10 +746,10 @@ function UVL._read_reference( self, values )
 	values = ( type(values) == "table" and values or { values } )
 
 	for _, value in ipairs(values) do
-		local ref = luci.util.split(value, ".")
+		local ref = util.split(value, ".")
 
 		if #ref == 2 or #ref == 3 then
-			local co = luci.uvl.config( self, ref[1] )
+			local co = config( self, ref[1] )
 			if not co:config() then return false, co:errors() end
 
 			for k, v in pairs(co:config()) do
@@ -783,10 +774,10 @@ end
 
 -- Resolve given path
 function UVL._resolve_function( self, value )
-	local path = luci.util.split(value, ".")
+	local path = util.split(value, ".")
 
 	for i=1, #path-1 do
-		local stat, mod = luci.util.copcall(
+		local stat, mod = pcall(
 			require, table.concat(path, ".", 1, i)
 		)
 
@@ -810,10 +801,20 @@ end
 
 
 --- Object representation of an uvl item - base class.
-uvlitem = luci.util.class()
+uvlitem = util.class()
 
 function uvlitem.cid(self)
-	return table.concat( self.cref, '.' )
+	if #self.cref == 1 then
+		return self.cref[1]
+	else
+		local r = { unpack(self.cref) }
+		local c = self.c
+		if c and c[r[2]] and c[r[2]]['.anonymous'] and c[r[2]]['.index'] then
+			r[2] = '@' .. c[r[2]]['.type'] ..
+			       '[' .. tostring(c[r[2]]['.index']) .. ']'
+		end
+		return table.concat( r, '.' )
+	end
 end
 
 function uvlitem.sid(self)
@@ -821,22 +822,15 @@ function uvlitem.sid(self)
 end
 
 function uvlitem.scheme(self, opt)
-	local s
-
+	local s = self.s and self.s.packages
+	s = s      and s[self.sref[1]]
 	if #self.sref == 4 or #self.sref == 3 then
-		s = self.s and self.s.packages
-		s = s      and s[self.sref[1]]
 		s = s      and s.variables
 		s = s      and s[self.sref[2]]
 		s = s      and s[self.sref[3]]
 	elseif #self.sref == 2 then
-		s = self.s and self.s.packages
-		s = s      and s[self.sref[1]]
 		s = s      and s.sections
 		s = s      and s[self.sref[2]]
-	else
-		s = self.s and self.s.packages
-		s = s      and s[self.sref[1]]
 	end
 
 	if s and opt then
@@ -847,15 +841,13 @@ function uvlitem.scheme(self, opt)
 end
 
 function uvlitem.config(self, opt)
-	local c
+	local c = self.c
 
-	if #self.cref == 4 or #self.cref == 3 then
-		c = self.c and self.c[self.cref[2]] or nil
-		c = c      and c[self.cref[3]]      or nil
-	elseif #self.cref == 2 then
-		c = self.c and self.c[self.cref[2]] or nil
-	else
-		c = self.c
+	if #self.cref >= 2 and #self.cref <= 4 then
+		c = c and self.c[self.cref[2]] or nil
+		if #self.cref >= 3 then
+			c = c and c[self.cref[3]] or nil
+		end
 	end
 
 	if c and opt then
@@ -871,13 +863,13 @@ function uvlitem.title(self)
 end
 
 function uvlitem.type(self)
-	if self.t == luci.uvl.TYPE_CONFIG then
+	if self.t == TYPE_CONFIG then
 		return 'config'
-	elseif self.t == luci.uvl.TYPE_SECTION then
+	elseif self.t == TYPE_SECTION then
 		return 'section'
-	elseif self.t == luci.uvl.TYPE_OPTION then
+	elseif self.t == TYPE_OPTION then
 		return 'option'
-	elseif self.t == luci.uvl.TYPE_ENUM then
+	elseif self.t == TYPE_ENUM then
 		return 'enum'
 	end
 end
@@ -903,22 +895,25 @@ function uvlitem.parent(self)
 	if self.p then
 		return self.p
 	elseif #self.cref == 3 or #self.cref == 4 then
-		return luci.uvl.section( self.s, self.c, self.cref[1], self.cref[2] )
+		return section( self.s, self.c, self.cref[1], self.cref[2] )
 	elseif #self.cref == 2 then
-		return luci.uvl.config( self.s, self.c, self.cref[1] )
+		return config( self.s, self.c, self.cref[1] )
 	else
 		return nil
 	end
 end
 
 function uvlitem._loadconf(self, co, c)
+	co = co or self._configcache
 	if not co then
-		local uci, err = luci.model.uci.cursor(), nil
-		co, err = uci:get_all(c)
+		local err
+		co, err = uci.cursor():get_all(c)
 
 		if err then
 			self:error(ERR.UCILOAD(self, err))
 		end
+
+		self._configcache = co
 	end
 	return co
 end
@@ -936,7 +931,7 @@ end
 -- @param co		Configuration data
 -- @param c			Configuration name
 -- @return			Config instance
-scheme = luci.util.class(uvlitem)
+scheme = util.class(uvlitem)
 
 function scheme.__init__(self, scheme, co, c)
 	if not c then
@@ -947,7 +942,7 @@ function scheme.__init__(self, scheme, co, c)
 	self.sref = { c }
 	self.c    = self:_loadconf(co, c)
 	self.s    = scheme
-	self.t    = luci.uvl.TYPE_SCHEME
+	self.t    = TYPE_SCHEME
 end
 
 --- Add an error to scheme.
@@ -960,7 +955,7 @@ end
 --- Get an associated config object.
 -- @return	Config instance
 function scheme.config(self)
-	local co = luci.uvl.config( self.s, self.cref[1] )
+	local co = config( self.s, self.cref[1] )
 	      co.p = self
 
 	return co
@@ -972,9 +967,9 @@ function scheme.sections(self)
 	local v = { }
 	if self.s.packages[self.sref[1]].sections then
 		for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
-			table.insert( v, luci.uvl.option(
+			v[#v+1] = option(
 				self.s, self.c, self.cref[1], self.cref[2], o
-			) )
+			)
 		end
 	end
 	return v
@@ -984,7 +979,7 @@ end
 -- @param s	Section to select
 -- @return	Section instance
 function scheme.section(self, s)
-	local so = luci.uvl.section( self.s, self.c, self.cref[1], s )
+	local so = section( self.s, self.c, self.cref[1], s )
 	      so.p = self
 
 	return so
@@ -1003,7 +998,7 @@ end
 -- @param co		Configuration data
 -- @param c			Configuration name
 -- @return			Config instance
-config = luci.util.class(uvlitem)
+config = util.class(uvlitem)
 
 function config.__init__(self, scheme, co, c)
 	if not c then
@@ -1014,7 +1009,7 @@ function config.__init__(self, scheme, co, c)
 	self.sref = { c }
 	self.c    = self:_loadconf(co, c)
 	self.s    = scheme
-	self.t    = luci.uvl.TYPE_CONFIG
+	self.t    = TYPE_CONFIG
 end
 
 --- Get all section objects associated with this config.
@@ -1023,9 +1018,9 @@ function config.sections(self)
 	local v = { }
 	if self.s.packages[self.sref[1]].sections then
 		for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
-			table.insert( v, luci.uvl.option(
+			v[#v+1] = option(
 				self.s, self.c, self.cref[1], self.cref[2], o
-			) )
+			)
 		end
 	end
 	return v
@@ -1035,7 +1030,7 @@ end
 -- @param s	Section to select
 -- @return	Section instance
 function config.section(self, s)
-	local so = luci.uvl.section( self.s, self.c, self.cref[1], s )
+	local so = section( self.s, self.c, self.cref[1], s )
 	      so.p = self
 
 	return so
@@ -1055,14 +1050,14 @@ end
 -- @param c			Configuration name
 -- @param s			Section name
 -- @return			Section instance
-section = luci.util.class(uvlitem)
+section = util.class(uvlitem)
 
 function section.__init__(self, scheme, co, c, s)
 	self.cref = { c, s }
 	self.sref = { c, co and co[s] and co[s]['.type'] or s }
 	self.c    = self:_loadconf(co, c)
 	self.s    = scheme
-	self.t    = luci.uvl.TYPE_SECTION
+	self.t    = TYPE_SECTION
 end
 
 --- Get all option objects associated with this section.
@@ -1073,9 +1068,9 @@ function section.variables(self)
 		for o, _ in pairs(
 			self.s.packages[self.sref[1]].variables[self.sref[2]]
 		) do
-			table.insert( v, luci.uvl.option(
+			v[#v+1] = option(
 				self.s, self.c, self.cref[1], self.cref[2], o
-			) )
+			)
 		end
 	end
 	return v
@@ -1085,7 +1080,7 @@ end
 -- @param o	Option to select
 -- @return	Option instance
 function section.option(self, o)
-	local oo = luci.uvl.option( self.s, self.c, self.cref[1], self.cref[2], o )
+	local oo = option( self.s, self.c, self.cref[1], self.cref[2], o )
 	      oo.p = self
 
 	return oo
@@ -1106,22 +1101,22 @@ end
 -- @param s			Section name
 -- @param o			Option name
 -- @return			Option instance
-option = luci.util.class(uvlitem)
+option = util.class(uvlitem)
 
 function option.__init__(self, scheme, co, c, s, o)
 	self.cref = { c, s, o }
 	self.sref = { c, co and co[s] and co[s]['.type'] or s, o }
 	self.c    = self:_loadconf(co, c)
 	self.s    = scheme
-	self.t    = luci.uvl.TYPE_OPTION
+	self.t    = TYPE_OPTION
 end
 
 --- Get the value of this option.
 -- @return	The associated configuration value
 function option.value(self)
-	local v = self:config()
+	local v = self:config() or self:scheme('default')
 	if v and self:scheme('multival') then
-		v = luci.util.split( v, "%s+", nil, true )
+		v = util.split( v, "%s+", nil, true )
 	end
 	return v
 end
@@ -1159,12 +1154,12 @@ end
 -- @param o			Enum name
 -- @param v			Enum value
 -- @return			Enum value instance
-enum = luci.util.class(option)
+enum = util.class(option)
 
 function enum.__init__(self, scheme, co, c, s, o, v)
 	self.cref = { c, s, o, v }
 	self.sref = { c, co and co[s] and co[s]['.type'] or s, o, v }
 	self.c    = self:_loadconf(co, c)
 	self.s    = scheme
-	self.t    = luci.uvl.TYPE_ENUM
+	self.t    = TYPE_ENUM
 end
diff --git a/libs/uvl/luasrc/uvl/datatypes.lua b/libs/uvl/luasrc/uvl/datatypes.lua
index e6a4c1688..fc37fa3c6 100644
--- a/libs/uvl/luasrc/uvl/datatypes.lua
+++ b/libs/uvl/luasrc/uvl/datatypes.lua
@@ -14,11 +14,14 @@ $Id$
 
 ]]--
 
-module( "luci.uvl.datatypes", package.seeall )
+local fs = require "luci.fs"
+local ip = require "luci.ip"
+local math = require "math"
+local util = require "luci.util"
 
-require("luci.fs")
-require("luci.ip")
-require("luci.util")
+local tonumber = tonumber
+
+module "luci.uvl.datatypes"
 
 
 function boolean( val )
@@ -26,6 +29,8 @@ function boolean( val )
 		return true
 	elseif val == "0" or val == "no" or val == "off" or val == "false" then
 		return true
+	elseif val == "" or val == nil then
+		return true
 	end
 
 	return false
@@ -59,7 +64,7 @@ end
 
 function ip4addr( val )
 	if val then
-		return luci.ip.IPv4(val) and true or false
+		return ip.IPv4(val) and true or false
 	end
 
 	return false
@@ -72,7 +77,7 @@ end
 
 function ip6addr( val )
 	if val then
-		return luci.ip.IPv6(val) and true or false
+		return ip.IPv6(val) and true or false
 	end
 
 	return false
@@ -102,7 +107,7 @@ function macaddr( val )
 		"^[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+:" ..
 		 "[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+$"
 	) then
-		local parts = luci.util.split( val, ":" )
+		local parts = util.split( val, ":" )
 
 		for i = 1,6 do
 			parts[i] = tonumber( parts[i], 16 )
@@ -134,7 +139,7 @@ function string( val )
 end
 
 function directory( val, seen )
-	local s = luci.fs.stat( val )
+	local s = fs.stat( val )
 	seen = seen or { }
 
 	if s and not seen[s.ino] then
@@ -142,7 +147,7 @@ function directory( val, seen )
 		if s.type == "directory" then
 			return true
 		elseif s.type == "link" then
-			return directory( luci.fs.readlink(val), seen )
+			return directory( fs.readlink(val), seen )
 		end
 	end
 
@@ -150,7 +155,7 @@ function directory( val, seen )
 end
 
 function file( val, seen )
-	local s = luci.fs.stat( val )
+	local s = fs.stat( val )
 	seen = seen or { }
 
 	if s and not seen[s.ino] then
@@ -158,7 +163,7 @@ function file( val, seen )
 		if s.type == "regular" then
 			return true
 		elseif s.type == "link" then
-			return file( luci.fs.readlink(val), seen )
+			return file( fs.readlink(val), seen )
 		end
 	end
 
diff --git a/libs/uvl/luasrc/uvl/dependencies.lua b/libs/uvl/luasrc/uvl/dependencies.lua
index 3aa3c73fa..d19149e7a 100644
--- a/libs/uvl/luasrc/uvl/dependencies.lua
+++ b/libs/uvl/luasrc/uvl/dependencies.lua
@@ -14,38 +14,35 @@ $Id$
 
 ]]--
 
-module( "luci.uvl.dependencies", package.seeall )
+local uvl = require "luci.uvl"
+local ERR = require "luci.uvl.errors"
+local util = require "luci.util"
+local table = require "table"
+
+local type, unpack = type, unpack
+local ipairs, pairs = ipairs, pairs
+
+module "luci.uvl.dependencies"
+
 
-local ERR = luci.uvl.errors
 
 function _parse_reference( r, c, s, o )
 	local ref  = { }
 	local vars = {
-		config  = ( c or '$config'  ),
-		section = ( s or '$section' ),
-		option  = ( o or '$option'  )
+		config  = c,
+		section = s,
+		option  = o
 	}
 
-	for i, v in ipairs(luci.util.split(r,".")) do
-		table.insert(ref, (v:gsub( "%$(.+)", function(n) return vars[n] end )))
+	for v in r:gmatch("[^.]+") do
+		ref[#ref+1] = (v:gsub( "%$(.+)", vars ))
 	end
-
-	if c or s then
-		if #ref == 1 and c and s then
-			ref = { c, s, ref[1] }
-		elseif #ref == 2 and c then
-			ref = { c, unpack(ref) }
-		elseif #ref ~= 3 then
-			ref = nil
-		end
-	else
-		if #ref == 1 then
-			ref = { '$config', '$section', ref[1] }
-		elseif #ref == 2 then
-			ref = { '$config', unpack(ref) }
-		elseif #ref ~= 3 then
-			ref = nil
-		end
+	
+	if #ref < 2 then
+		table.insert(ref, 1, s or '$section')
+	end
+	if #ref < 3 then
+		table.insert(ref, 1, c or '$config')
 	end
 
 	return ref
@@ -54,7 +51,7 @@ end
 function _serialize_dependency( dep, v )
 	local str
 
-	for k, v in luci.util.spairs( dep,
+	for k, v in util.spairs( dep,
 		function(a,b)
 			a = ( type(dep[a]) ~= "boolean" and "_" or "" ) .. a
 			b = ( type(dep[b]) ~= "boolean" and "_" or "" ) .. b
@@ -92,7 +89,7 @@ function check( self, object, nodeps )
 					return false, derr:child(ERR.SME_BADDEP(object,k))
 				end
 
-				local option = luci.uvl.option( self, object.c, unpack(ref) )
+				local option = uvl.option( self, object.c, unpack(ref) )
 
 				valid, err = self:_validate_option( option, true )
 				if valid then
diff --git a/libs/uvl/luasrc/uvl/errors.lua b/libs/uvl/luasrc/uvl/errors.lua
index 8e0d78ad1..242965ddc 100644
--- a/libs/uvl/luasrc/uvl/errors.lua
+++ b/libs/uvl/luasrc/uvl/errors.lua
@@ -14,11 +14,19 @@ $Id$
 
 ]]--
 
-module( "luci.uvl.errors", package.seeall )
+local uci = require "luci.model.uci"
+local uvl = require "luci.uvl"
+local util = require "luci.util"
+local string = require "string"
 
-require("luci.util")
+local ipairs, error, type = ipairs, error, type 
+local tonumber, unpack = tonumber, unpack
 
 
+local luci = luci
+
+module "luci.uvl.errors"
+
 ERRCODES = {
 	{ 'UCILOAD', 		'Unable to load config "%p": %1' },
 
@@ -68,11 +76,11 @@ ERRCODES = {
 
 -- build error constants and instance constructors
 for i, v in ipairs(ERRCODES) do
-	luci.uvl.errors[v[1]] = function(...)
+	_M[v[1]] = function(...)
 		return error(i, ...)
 	end
 
-	luci.uvl.errors['ERR_'..v[1]] = i
+	_M['ERR_'..v[1]] = i
 end
 
 
@@ -85,14 +93,14 @@ function i18n(key, def)
 end
 
 
-error = luci.util.class()
+error = util.class()
 
 function error.__init__(self, code, pso, args)
 
 	self.code = code
 	self.args = ( type(args) == "table" and args or { args } )
 
-	if luci.util.instanceof( pso, luci.uvl.uvlitem ) then
+	if util.instanceof( pso, uvl.uvlitem ) then
 		self.stype = pso.sref[2]
 		self.package, self.section, self.option, self.value = unpack(pso.cref)
 		self.object = pso
@@ -101,7 +109,7 @@ function error.__init__(self, code, pso, args)
 		pso = ( type(pso) == "table" and pso or { pso } )
 
 		if pso[2] then
-			local uci = luci.model.uci.cursor()
+			local uci = uci.cursor()
 			self.stype = uci:get(pso[1], pso[2]) or pso[2]
 		end
 
@@ -113,7 +121,7 @@ function error.child(self, err)
 	if not self.childs then
 		self.childs = { err }
 	else
-		table.insert( self.childs, err )
+		self.childs[#self.childs+1] = err
 	end
 	return self
 end
diff --git a/libs/uvl/luasrc/uvl/validation.lua b/libs/uvl/luasrc/uvl/validation.lua
index 50f9da0cd..90fde64f1 100644
--- a/libs/uvl/luasrc/uvl/validation.lua
+++ b/libs/uvl/luasrc/uvl/validation.lua
@@ -14,26 +14,28 @@ $Id$
 
 ]]--
 
-module( "luci.uvl.validation", package.seeall )
+local os = require "os"
+local fs = require "luci.fs"
+local sys = require "luci.sys"
+local ERR = require "luci.uvl.errors"
 
-require("luci.fs")
-require("luci.sys")
+local ipairs, unpack, type, tostring = ipairs, unpack, type, tostring
 
-local ERR = luci.uvl.errors
+module "luci.uvl.validation"
 
 function _exec( bin, args )
 	local cmd, output = "", nil
 
 	for _, v in ipairs({ bin, unpack(args) }) do
-		cmd = cmd .. string.format("%q ",v):gsub("([%$`])","\\%1")
+		cmd = cmd .. ("%q " % v):gsub("([%$`])","\\%1")
 	end
 
-	local tmpfile = "/tmp/uvl" .. luci.sys.uniqueid(8)
+	local tmpfile = "/tmp/uvl" .. sys.uniqueid(8)
 	local retval  = os.execute( cmd .. " 1>" .. tmpfile .. " 2>" .. tmpfile )
 
-	if luci.fs.access(tmpfile) then
-		output = luci.fs.readfile(tmpfile)
-		luci.fs.unlink(tmpfile)
+	if fs.access(tmpfile) then
+		output = fs.readfile(tmpfile)
+		fs.unlink(tmpfile)
 	end
 
 	return retval, output
-- 
2.11.0