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base.ml
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base.ml
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(*
Copyright 2004 Michalis Kamburelis.
This file is part of "Bad Blaster".
"Bad Blaster" is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
"Bad Blaster" is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with "Bad Blaster"; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
exception E_Internal_Error of string;;
(* wewnetrzne exception pomocnicze do array_is_mem *)
exception E_ArrayIsMemFound;;
let repeat instr cond =
instr ();
while not (cond ()) do instr (); done
;;
(* testy:
let x = ref 0 in
repeat (function () -> print_int !x; incr x) (function () -> !x >= 3);;
(* => output 012 *)
let x = ref 0 in
repeat (function () -> print_int !x; incr x) (function () -> !x >= -1);;
(* => output 0 *)
*)
let while_some provider consumer =
let e = ref None in
while e := provider(); !e <> None do
match !e with
| Some evalue -> consumer evalue
| _ -> raise (E_Internal_Error "bbUtils.while_some")
done
;;
exception E_Try_Finally_Exit;;
let try_finally a b =
(* Jezeli a wywolalo wyjatek, to wykonamy b i zrobimy reraise wyjatku.
Jezeli a nie wywolalo wyjatku to zrobimy "sztuczny" wyjatek
E_Try_Finally_Exit ktory spowoduje ze i tak wywolamy b,
a sam wyjatek E_Try_Finally_Exit zostanie wyciszony.
Jezeli b wywolalo wyjatek to wyjatek ten zasloni ew. wyjatek
rzucony przez a.
Opieramy sie wszedzie tutaj na fakcie ze ani a ani b nie moga
wywolac wewnetrznego wyjatku E_Try_Finally_Exit. *)
try
try a(); raise E_Try_Finally_Exit; with e -> begin b(); raise e end;
with E_Try_Finally_Exit -> ()
;;
(* testy:
exception E_Test_1;;
exception E_Test_2;;
try_finally
(function () -> print_endline "a"; raise E_Test_1; print_endline "a_never")
(function () -> print_endline "b");; (* a, b, Exception E_Test_1 *)
try_finally
(function () -> print_endline "a")
(function () -> print_endline "b");; (* a, b *)
try_finally
(function () -> print_endline "a"; raise E_Test_1; print_endline "a_never")
(function () -> print_endline "b"; raise E_Test_2; print_endline "b_never");;
(* a, b, Exception E_Test_2 *)
try_finally
(function () -> print_endline "a")
(function () -> print_endline "b"; raise E_Test_2; print_endline "b_never");;
(* a, b, Exception E_Test_2 *)
*)
let fract x = fst (modf x);;
let round x =
let tx = truncate x and fx = fract x in
if x >= 0.0 then
if fx >= 0.5 then tx+1 else tx
else
if fx >= -0.5 then tx else tx-1
;;
(* testy:
round (-1.9);;
round (-1.3);;
round (-0.8);;
round (-0.4);;
round (0.4);;
round 1.0;;
round 1.3;;
round 1.7;;
round 2.3;;
round 2.9;;
*)
let int_floor x =
let tx = truncate x in
if x >= 0.0 then
tx else
if fract x < 0.0 then tx-1 else tx
;;
(* testy:
int_floor (-1.9);;
int_floor (-1.3);;
int_floor (-0.8);;
int_floor (-0.4);;
int_floor (0.4);;
int_floor 1.0;;
int_floor 1.3;;
int_floor 1.7;;
int_floor 2.3;;
int_floor 2.9;;
*)
let int_ceil x =
let tx = truncate x in
if (x >= 0.0) && (fract x > 0.0) then tx+1 else tx
;;
(* testy:
int_ceil (-1.9);;
int_ceil (-1.3);;
int_ceil (-0.8);;
int_ceil (-0.4);;
int_ceil (0.4);;
int_ceil 1.0;;
int_ceil 1.3;;
int_ceil 1.7;;
int_ceil 2.3;;
int_ceil 2.9;;
*)
let rec list_delete l a =
match l with
| [] -> []
| x::xs -> if x=a then xs else x::(list_delete xs a)
;;
(* testy:
list_delete [] 1;;
list_delete [2; 3] 1;;
list_delete [2; 1; 3] 1;;
list_delete [2; 1; 3; 1] 1;;
*)
let listr_add l a = l := a::!l;;
let listr_delete l a = l := list_delete !l a;;
let rec list_find_and_remove pred = function
| [] -> ([], false)
| x::xs -> if pred x then (xs, true) else
let (resultxs, resultbool) = list_find_and_remove pred xs in
(x::resultxs, resultbool)
;;
(* testy:
list_find_and_remove (function x -> 1 = x) [2;3;4];; (* => ([2; 3; 4], false) *)
list_find_and_remove (function x -> 1 = x) [2;1;3;4];; (* => ([2; 3; 4], true) *)
list_find_and_remove (function x -> 1 = x) [2;1;3;1;4];; (* => ([2; 3; 1; 4], true) *)
*)
let list_find_and_remove_all pred list =
let some_removal_done = ref false in
let a = List.filter
(function item ->
let result = not (pred item) in
if result then () else some_removal_done:=true;
result)
list in
(a, !some_removal_done)
;;
(* testy:
list_find_and_remove_all (function x -> 1 = x) [2;3;4];; (* => ([2; 3; 4], false) *)
list_find_and_remove_all (function x -> 1 = x) [2;1;3;4];; (* => ([2; 3; 4], true) *)
list_find_and_remove_all (function x -> 1 = x) [2;1;3;1;4];; (* => ([2; 3; 1; 4], true) *)
*)
let filename_auto_inc s =
let result = ref "" and i = ref 0 in
repeat
(function () -> result:=Printf.sprintf s !i; incr i)
(function () -> not (Sys.file_exists !result));
!result
;;
let program_name =
let name = Filename.basename Sys.executable_name in
if Filename.check_suffix name ".exe" then
Filename.chop_suffix name ".exe" else
if Filename.check_suffix name ".opt" then
Filename.chop_suffix name ".opt" else
name
;;
let path_delim =
match Sys.os_type with
| "Win32" -> '\\'
| "Unix" | "Cygwin" -> '/'
| _ -> raise (E_Internal_Error "Base.path_delim: unknown OS")
;;
let incl_path_delim s =
s ^ (if (s="") || (s.[String.length s - 1] <> path_delim) then
(String.make 1 path_delim)
else "")
;;
let data_path =
match Sys.os_type with
| "Win32" -> incl_path_delim (Filename.dirname Sys.executable_name)
| "Unix" | "Cygwin" ->
let system_wide_path = "/usr/local/share/" ^ program_name ^ "/" in
if Sys.file_exists system_wide_path then
system_wide_path else
(incl_path_delim (Sys.getenv "HOME")) ^ "." ^ program_name ^ ".data/"
| _ -> raise (E_Internal_Error "Base.data_path: unknown OS")
;;
let pi = 3.14159265358979323846;;
let sqrt2 = 1.41421356237309504880;;
let deg_to_rad x = x *. pi/.180.0;;
let rad_to_deg x = x *. 180.0/.pi;;
let float_norm x bound =
if x >= 0.0 then
mod_float x bound else
(bound -. mod_float (-.x) bound)
;;
let angle_deg_norm x = float_norm x 360.0;;
let int_norm x bound = let m = x mod bound in if m<0 then bound+m else m;;
let sqr x = x*x;;
let clamped value min max =
if value < min then min else
if value > max then max else
value
;;
(* testy:
clamped 0 2 5;;
clamped 3 2 5;;
clamped 100 2 5;;
*)
let arg_parse speclist anon_fun usage_msg =
Arg.parse
(speclist @
[("--", Arg.Rest anon_fun, "Do not interpret following argumets")])
anon_fun usage_msg
;;
let bool_to_yn value = if value then "yes" else "no";;