X-Git-Url: https://git.hcoop.net/hcoop/zz_old/portal.git/blobdiff_plain/f1ea3762bc9df26700bba252f9491087211ebad1..a5520ba055675fdf593cdf4e21e48749bf42f6b1:/util.sml

diff --git a/util.sml b/util.sml
index 39edd39..d1c7214 100644
--- a/util.sml
+++ b/util.sml
@@ -1,6 +1,12 @@
 structure Util :> UTIL =
 struct
 
+datatype 'a flat_element =
+	 BEGIN
+       | END
+       | ITEM of 'a
+type 'a flat_tree = 'a flat_element list
+
 fun printInt n =
     Web.print (if n < 0 then
 		   "-" ^ Int.toString (~n)
@@ -22,5 +28,57 @@ fun makeSet f items =
       | usr::rest => foldl (fn (usr, s) => s ^ ", " ^ f usr) ("(" ^ f usr) rest ^ ")"
 
 fun neg (r : real) = ~r
+fun add (r1 : real, r2) = r1 + r2
+fun mult (r1, r2) = real r1 * r2
+
+fun isIdent ch = Char.isLower ch orelse Char.isDigit ch orelse ch = #"-"
+
+fun validHost s =
+    size s > 0 andalso size s < 40 andalso List.all isIdent (String.explode s)
+					          
+fun validDomain s =
+    size s > 0 andalso size s < 100 andalso List.all validHost (String.fields (fn ch => ch = #".") s)
+
+fun validUser s =
+    size s > 0 andalso size s < 50 andalso List.all
+					       (fn ch => isIdent ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-" orelse ch = #"+")
+					       (String.explode s)
+
+fun validEmailUser s =
+    size s > 0 andalso size s < 50 andalso List.all
+					       (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-" orelse ch = #"+")
+					       (String.explode s)
+
+fun validEmail s =
+    (case String.fields (fn ch => ch = #"@") s of
+	 [user, host] => validEmailUser user andalso validDomain host
+       | _ => false)
+
+fun whoisUrl dom = String.concat ["http://reports.internic.net/cgi/whois?whois_nic=", dom, "&type=domain"]
+
+val rnd = ref (Random.rand (0, 0))
+
+fun init () = rnd := Random.rand (SysWord.toInt (Posix.Process.pidToWord (Posix.ProcEnv.getpid ())),
+				  SysWord.toInt (Posix.Process.pidToWord (Posix.ProcEnv.getpid ())))
+
+fun randomPassword () = Int.toString (Int.abs (Random.randInt (!rnd)))
+
+fun domainDir dom =
+    String.concatWith "/" ("/etc/domains" :: String.fields (fn ch => ch = #".") dom)
+
+fun readFile fname =
+    let
+	val inf = TextIO.openIn fname
+
+	fun readLines lines =
+	    case TextIO.inputLine inf of
+		NONE => String.concat (List.rev lines)
+	      | SOME line => readLines (line :: lines)
+    in
+	readLines []
+	before TextIO.closeIn inf
+    end
+
+fun mem (x, ls) = List.exists (fn y => y = x) ls
 
-end
\ No newline at end of file
+end