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 is_executable: string -> bool (** @return true if file is executable *)
38 val mkdir: string -> unit (** create dir and parents. @raise Failure *)
39 val tilde_expand: string -> string (** bash-like (head) tilde expansion *)
40 val safe_remove: string -> unit (** removes a file if it exists *)
41 val safe_rmdir: string -> unit (** removes a dir if it exists and is empty *)
42 val is_dir_empty: string -> bool (** checks if the dir is empty *)
43 val rmdir_descend: string -> unit (** rmdir -p *)
44 val chmod: int -> string -> unit (** chmod *)
45 val normalize_path: string -> string (** /foo/./bar/..//baz -> /foo/baz *)
47 (** find all _files_ whose name matches test under a filesystem root.
48 * Test is passed the filename path relative to the given filesystem root *)
49 val find: ?test:(string -> bool) -> string -> string list
51 (** find_in paths name returns the first path^"/"^name such that
52 * is a regular file and the current user can 'stat' it.
53 * May raise (Failure "find_in") *)
54 val find_in: string list -> string -> string
58 val input_file: string -> string (** read all the contents of file to string *)
59 val input_all: in_channel -> string (** read all the contents of a channel *)
60 val output_file: filename:string -> text:string -> unit (** other way round *)
62 (** {2 Exception handling} *)
64 (** @param finalizer finalization function (execution both in case of success
65 * and in case of raised exception
66 * @param f function to be invoked
67 * @param arg argument to be passed to function *)
68 val finally: (unit -> unit) -> ('a -> 'b) -> 'a -> 'b
70 (** {2 Char processing} *)
72 val is_alpha: char -> bool
73 val is_blank: char -> bool
74 val is_digit: char -> bool
75 val is_alphanum: char -> bool (** is_alpha || is_digit *)
77 (** {2 String processing} *)
79 val split: ?sep:char -> string -> string list (** @param sep defaults to ' ' *)
80 val trim_blanks: string -> string (** strip heading and trailing blanks *)
82 (** {2 List processing} *)
85 ?eq:('a->'a->bool) -> 'a list -> 'a list (** uniq unix filter on lists *)
86 val filter_map: ('a -> 'b option) -> 'a list -> 'b list (** filter + map *)
87 val filter_map_acc: ('acc -> 'a -> ('acc * 'b) option) -> 'acc -> 'a list ->
88 'acc * 'b list (** fold/filter + map *)
89 val filter_map_monad: ('acc -> 'a -> 'acc * 'b option) -> 'acc -> 'a list ->
90 'acc * 'b list (** fold/filter + map *)
92 val list_rev_map_filter: ('a -> 'b option) -> 'a list -> 'b list
93 val list_rev_map_filter_fold: ('c -> 'a -> 'c * 'b option) -> 'c -> 'a list -> 'c * 'b list
94 val list_concat: ?sep:'a list -> 'a list list -> 'a list (**String.concat-like*)
95 val list_iter_sep: sep:(unit -> unit) -> ('a -> unit) -> 'a list -> unit
96 val list_findopt: ('a -> int -> 'b option) -> 'a list -> 'b option
97 val flatten_map: ('a -> 'b list) -> 'a list -> 'b list
98 val list_last: 'a list -> 'a
99 val list_mapi: ('a -> int -> 'b) -> 'a list -> 'b list
101 ('a -> int -> 'acc -> 'acc * 'b) -> 'acc -> 'a list -> 'acc * 'b list
102 (* Finds the zero based index of the first element that satisfies a predicate*)
103 val list_index: ('a -> bool) -> 'a list -> (int * 'a) option
104 val sharing_map: ('a -> 'a) -> 'a list -> 'a list
106 ('acc -> 'a -> 'acc * 'a) -> 'acc -> 'a list -> 'acc * 'a list
107 (* Iters in parallel on two lists until the first list is empty.
108 The second one can be shorter and is padded with a default value.
109 This function cannot fail. *)
110 val list_iter_default2: ('a -> 'b -> unit) -> 'a list -> 'b -> 'b list -> unit
111 exception FailureAt of int
112 (* Checks a predicate in parallel on three lists, the first two having the same
113 length (otherwise it raises Invalid_argument). It stops when the first two
114 lists are empty. The third one can be shorter and is padded with a default
115 value. It can also raise FailureAt when ??? *)
116 val list_forall_default3: ('a -> 'b -> 'c -> bool) -> 'a list -> 'b list -> 'c -> 'c list -> bool
117 val list_forall_default3_var: ('a -> 'b -> 'c -> bool) -> 'a list -> 'b list -> 'c -> 'c list -> bool
120 * @returns two list, the first contains at least n elements, the second the
122 * @raise Failure when List.length l < n *)
123 val split_nth: int -> 'a list -> 'a list * 'a list
125 (** skip [n] [l] skips the first n elements of l *)
126 val list_skip : int -> 'a list -> 'a list
128 val mk_list: 'a -> int -> 'a list
130 (* makes the list [start; ...; stop - 1] *)
131 val list_seq: int -> int -> int list
133 (* like List.assoc but returns all bindings *)
134 val list_assoc_all: 'a -> ('a * 'b) list -> 'b list
136 (** {2 Debugging & Profiling} *)
138 type profiler = { profile : 'a 'b. ('a -> 'b) -> 'a -> 'b }
140 (** @return a profiling function; [s] is used for labelling the total time at
141 * the end of the execution *)
142 val profile : ?enable:bool -> string -> profiler
143 val set_profiling_printings : (string -> bool) -> unit
145 (** {2 Localized exceptions } *)
147 exception Localized of Stdpp.location * exn
149 val loc_of_floc: Stdpp.location -> int * int
150 val floc_of_loc: int * int -> Stdpp.location
152 val dummy_floc: Stdpp.location
154 val raise_localized_exception: offset:int -> Stdpp.location -> exn -> 'a
156 (* size in KB (SLOW) *)
157 val estimate_size: 'a -> int
159 (* is_prefix_of [prefix] [string], in terms of dirs:
160 * foo/bar/ is prefix of foo/bar/baz
161 * foo/bar is prefix of foo/bar/baz
162 * foo/b isn't of foo/bar/baz
163 * foo/bar is prefix of foo/bar
165 val is_prefix_of: string -> string -> bool
166 val chop_prefix: string -> string -> string
167 val touch: string -> unit
169 val profiling_enabled: bool ref