Commit | Line | Data |
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208e2cbc AC |
1 | structure Util :> UTIL = |
2 | struct | |
3 | ||
b340786b AC |
4 | datatype 'a flat_element = |
5 | BEGIN | |
6 | | END | |
7 | | ITEM of 'a | |
8 | type 'a flat_tree = 'a flat_element list | |
9 | ||
208e2cbc AC |
10 | fun printInt n = |
11 | Web.print (if n < 0 then | |
12 | "-" ^ Int.toString (~n) | |
13 | else | |
14 | Int.toString n) | |
15 | ||
16 | fun printReal n = | |
17 | Web.print (if n < 0.0 then | |
18 | "-" ^ Real.fmt (StringCvt.FIX (SOME 2)) (~n) | |
19 | else | |
20 | Real.fmt (StringCvt.FIX (SOME 2)) n) | |
21 | ||
22 | fun id x = x | |
23 | ||
24 | fun makeSet f items = | |
25 | case items of | |
26 | [] => "()" | |
27 | | [usr] => "(" ^ f usr ^ ")" | |
28 | | usr::rest => foldl (fn (usr, s) => s ^ ", " ^ f usr) ("(" ^ f usr) rest ^ ")" | |
29 | ||
f49e1088 | 30 | fun neg (r : real) = ~r |
9bda1e7f | 31 | fun add (r1 : real, r2) = r1 + r2 |
f49e1088 | 32 | |
5da9f4a9 AC |
33 | fun isIdent ch = Char.isLower ch orelse Char.isDigit ch |
34 | ||
35 | fun validHost s = | |
36 | size s > 0 andalso size s < 20 andalso List.all isIdent (String.explode s) | |
37 | ||
38 | fun validDomain s = | |
39 | size s > 0 andalso size s < 100 andalso List.all validHost (String.fields (fn ch => ch = #".") s) | |
40 | ||
9d1c0e98 AC |
41 | fun validUser s = |
42 | size s > 0 andalso size s < 50 andalso List.all | |
43 | (fn ch => isIdent ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-" orelse ch = #"+") | |
44 | (String.explode s) | |
45 | ||
46 | fun validEmailUser s = | |
47 | size s > 0 andalso size s < 50 andalso List.all | |
48 | (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-" orelse ch = #"+") | |
49 | (String.explode s) | |
50 | ||
51 | fun validEmail s = | |
52 | (case String.fields (fn ch => ch = #"@") s of | |
53 | [user, host] => validEmailUser user andalso validDomain host | |
54 | | _ => false) | |
55 | ||
5da9f4a9 AC |
56 | fun whoisUrl dom = String.concat ["http://reports.internic.net/cgi/whois?whois_nic=", dom, "&type=domain"] |
57 | ||
9d1c0e98 AC |
58 | val rnd = ref (Random.rand (0, 0)) |
59 | ||
60 | fun init () = rnd := Random.rand (SysWord.toInt (Posix.Process.pidToWord (Posix.ProcEnv.getpid ())), | |
61 | SysWord.toInt (Posix.Process.pidToWord (Posix.ProcEnv.getpid ()))) | |
62 | ||
63 | fun randomPassword () = Int.toString (Int.abs (Random.randInt (!rnd))) | |
64 | ||
208e2cbc | 65 | end |