X-Git-Url: http://git.hcoop.net/hcoop/portal.git/blobdiff_plain/208e2cbc6b64811eba6c762795022c042bc48e33..aaba877afe8e8ce438a63ba764897fbfdbf2d760:/util.sml

diff --git a/util.sml b/util.sml
index 6f067ac..9c269c1 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)
@@ -21,4 +27,86 @@ fun makeSet f items =
       | [usr] => "(" ^ f usr ^ ")"
       | usr::rest => foldl (fn (usr, s) => s ^ ", " ^ f usr) ("(" ^ f usr) rest ^ ")"
 
-end
\ No newline at end of file
+fun neg (r : real) = ~r
+fun add (r1 : real, r2) = r1 + r2
+fun sub (r1 : real, r2) = r1 - r2
+fun mult (r1, r2) = real r1 * r2
+
+fun lt (r1 : real, r2) = r1 < r2
+fun ge (r1 : real, r2) = 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 "/" ("/afs/hcoop.net/common/etc/domtool/nodes/deleuze" :: List.rev (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
+
+val allLower = CharVector.map Char.toLower
+
+fun normEmail s = case String.tokens Char.isSpace (allLower s) of
+		      s :: _ => s
+		    | [] => ""
+
+val s_cutoff = LargeInt.fromInt 60
+val m_cutoff = LargeInt.fromInt (60 * 60)
+val h_cutoff = LargeInt.fromInt (60 * 60 * 24)
+
+fun diffFromNow t =
+    let
+	val secs = Time.toSeconds (Time.- (Time.now (), t))
+    in
+	if LargeInt.< (secs, s_cutoff) then
+	    LargeInt.toString secs ^ " seconds"
+	else if LargeInt.< (secs, m_cutoff) then
+	    LargeInt.toString (LargeInt.div (secs, s_cutoff)) ^ " minutes"
+	else if LargeInt.< (secs, h_cutoff) then
+	    LargeInt.toString (LargeInt.div (secs, m_cutoff)) ^ " hours"
+	else
+	    LargeInt.toString (LargeInt.div (secs, h_cutoff)) ^ " days"
+    end
+
+end