1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 (** {2 Optional values} *)
28 val map_option: ('a -> 'b) -> 'a option -> 'b option
29 val iter_option: ('a -> unit) -> 'a option -> unit
30 val unopt: 'a option -> 'a (** @raise Failure *)
34 val is_dir: string -> bool (** @return true if file is a directory *)
35 val writable_dir: string -> bool (** @return true if the directory is writable *)
36 val is_regular: string -> bool (** @return true if file is a regular file *)
37 val mkdir: string -> unit (** create dir and parents. @raise Failure *)
38 val tilde_expand: string -> string (** bash-like (head) tilde expansion *)
39 val safe_remove: string -> unit (** removes a file if it exists *)
40 val safe_rmdir: string -> unit (** removes a dir if it exists and is empty *)
41 val is_dir_empty: string -> bool (** checks if the dir is empty *)
42 val rmdir_descend: string -> unit (** rmdir -p *)
44 (** find all _files_ whose name matches test under a filesystem root.
45 * Test is passed the filename path relative to the given filesystem root *)
46 val find: ?test:(string -> bool) -> string -> string list
50 val input_file: string -> string (** read all the contents of file to string *)
51 val input_all: in_channel -> string (** read all the contents of a channel *)
52 val output_file: filename:string -> text:string -> unit (** other way round *)
54 (** {2 Exception handling} *)
56 (** @param finalizer finalization function (execution both in case of success
57 * and in case of raised exception
58 * @param f function to be invoked
59 * @param arg argument to be passed to function *)
60 val finally: (unit -> unit) -> ('a -> 'b) -> 'a -> 'b
62 (** {2 Char processing} *)
64 val is_alpha: char -> bool
65 val is_blank: char -> bool
66 val is_digit: char -> bool
67 val is_alphanum: char -> bool (** is_alpha || is_digit *)
69 (** {2 String processing} *)
71 val split: ?sep:char -> string -> string list (** @param sep defaults to ' ' *)
72 val trim_blanks: string -> string (** strip heading and trailing blanks *)
74 (** {2 List processing} *)
77 ?eq:('a->'a->bool) -> 'a list -> 'a list (** uniq unix filter on lists *)
78 val filter_map: ('a -> 'b option) -> 'a list -> 'b list (** filter + map *)
79 val list_rev_map_filter: ('a -> 'b option) -> 'a list -> 'b list
80 val list_rev_map_filter_fold: ('c -> 'a -> 'c * 'b option) -> 'c -> 'a list -> 'c * 'b list
81 val list_concat: ?sep:'a list -> 'a list list -> 'a list (**String.concat-like*)
82 val list_findopt: ('a -> 'b option) -> 'a list -> 'b option
83 val flatten_map: ('a -> 'b list) -> 'a list -> 'b list
84 val list_last: 'a list -> 'a
87 * @returns two list, the first contains at least n elements, the second the
89 * @raise Failure when List.length l < n *)
90 val split_nth: int -> 'a list -> 'a list * 'a list
92 (** {2 Debugging & Profiling} *)
94 type profiler = { profile : 'a 'b. ('a -> 'b) -> 'a -> 'b }
96 (** @return a profiling function; [s] is used for labelling the total time at
97 * the end of the execution *)
98 val profile : ?enable:bool -> string -> profiler
99 val set_profiling_printings : (string -> bool) -> unit
101 (** {2 Localized exceptions } *)
103 exception Localized of Token.flocation * exn
105 val loc_of_floc: Token.flocation -> int * int
106 val floc_of_loc: int * int -> Token.flocation
108 val dummy_floc: Lexing.position * Lexing.position
110 val raise_localized_exception: offset:int -> Token.flocation -> exn -> 'a
112 (* size in KB (SLOW) *)
113 val estimate_size: 'a -> int