X-Git-Url: https://git.archive.openwrt.org/?a=blobdiff_plain;f=src%2Fffluci%2Futil.lua;h=12031ff7d8e0c3b0a179201abe8f361cd1d1ac68;hb=e8b87fffb9ec6654eeb82c49e49ca9491ff4299c;hp=6e0d8675a3740d56c2a68dafbae868e3d92034ca;hpb=03ad2398aae1f745266118a9e94ed4636a3872eb;p=project%2Fluci.git

diff --git a/src/ffluci/util.lua b/src/ffluci/util.lua
index 6e0d8675a..12031ff7d 100644
--- a/src/ffluci/util.lua
+++ b/src/ffluci/util.lua
@@ -92,6 +92,7 @@ function exec(command)
 	return data
 end
 
+
 -- Runs "command" and returns its output as a array of lines
 function execl(command)
 	local pp   = io.popen(command)	
@@ -108,6 +109,7 @@ function execl(command)
 	return data
 end
 
+
 -- Populate obj in the scope of f as key 
 function extfenv(f, key, obj)
 	local scope = getfenv(f)
@@ -116,6 +118,19 @@ function extfenv(f, key, obj)
 end
 
 
+-- Checks whether an object is an instanceof class
+function instanceof(object, class)
+	local meta = getmetatable(object)
+    while meta and meta.__index do 
+    	if meta.__index == class then
+    		return true
+    	end
+        meta = getmetatable(meta.__index)
+    end
+    return false	
+end
+
+
 -- Updates the scope of f with "extscope"
 function updfenv(f, extscope)
 	local scope = getfenv(f)
@@ -125,6 +140,30 @@ function updfenv(f, extscope)
 	setfenv(f, scope)
 end
 
+
+-- Validates a variable
+function validate(value, cast_number, cast_int, valid)
+	if cast_number or cast_int then
+		value = tonumber(value)
+	end
+	
+	if cast_int and not(value % 1 == 0) then
+		value = nil
+	end
+	
+	
+	if type(valid) == "function" then
+		value = valid(value)
+	elseif type(valid) == "table" then
+		if not ffluci.util.contains(valid, value) then
+			value = nil
+		end
+	end
+	
+	return value
+end
+
+
 -- Returns the filename of the calling script
 function __file__()
 	return debug.getinfo(2, 'S').source:sub(2)