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Safer code for input format auto-detection

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This commit is contained in:
Guillaume Bury 2014-11-11 10:45:01 +01:00
parent 172ff8bca3
commit ccfbe72bdf
1 changed files with 12 additions and 9 deletions
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21
util/sat_solve.ml
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@ -48,23 +48,26 @@ let rec rev_flat_map f acc = function
let format_of_filename s =
let last n =
try
String.sub s (String.length s - n) n
with Invalid_argument _ ->
""
try String.sub s (String.length s - n) n
with Invalid_argument _ -> ""
in
if last 4 = ".cnf" then
"dimacs"
Dimacs
else if last 5 = ".smt2" then
"smtlib"
Smtlib
else (* Default choice *)
"dimacs"
Dimacs
let rec parse_input file = match !input with
| Auto -> set_input (format_of_filename file); parse_input file
let parse_with_input file = function
| Auto -> assert false
| Dimacs -> List.rev_map (List.rev_map S.make) (Parsedimacs.parse file)
| Smtlib -> Sat.Tseitin.simplify_cnf (rev_flat_map Sat.Tseitin.make_cnf [] (Smtlib.parse file))
let parse_input file =
parse_with_input file (match !input with
| Auto -> format_of_filename file
| f -> f)
(* Printing wrappers *)
let std = Format.std_formatter