let t0 = Date.make 1970 1 1 in
let t' = Date.add t0 (Date.Period.month months) in
Date.to_unixfloat t'
+
+let check_valid_variable_name name =
+ (* Don't permit certain names. *)
+ if name = "JOBSERIAL" then
+ failwith "JOBSERIAL variable cannot be set";
+
+ let len = String.length name in
+ if len = 0 then
+ failwith "variable name is an empty string";
+ if name.[0] <> '_' && not (isalpha name.[0]) then
+ failwith "variable name must start with alphabetic character or underscore";
+
+ let rec loop i =
+ if i >= len then ()
+ else if name.[i] <> '_' && not (isalnum name.[i]) then
+ failwith "variable name contains non-alphanumeric non-underscore character"
+ else loop (i+1)
+ in
+ loop 1