2 * Copyright (C) 2019 Richard W.M. Jones
3 * Copyright (C) 2019 Red Hat Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 external nprocs : unit -> int = "nprocs"
24 let failwithf fs = ksprintf failwith fs
26 let (//) = Filename.concat
27 let is_directory d = try Sys.is_directory d with Sys_error _ -> false
29 let unique = let i = ref 0 in fun () -> incr i; !i
31 (* From OCaml 4.08 sources. We can remove this when we can
32 * depend on min OCaml 4.08.
35 let rec aux accu = function
40 | Some v -> aux (v :: accu) l
45 (* From libguestfs sources. *)
46 let rec string_find s sub =
47 let len = String.length s in
48 let sublen = String.length sub in
50 if i <= len-sublen then (
53 if s.[i+j] = sub.[j] then loop2 (j+1)
59 if r = -1 then loop (i+1) else r
65 let rec split sep str =
66 let len = String.length sep in
67 let seplen = String.length str in
68 let i = string_find str sep in
69 if i = -1 then str, ""
71 String.sub str 0 i, String.sub str (i + len) (seplen - i - len)
74 and nsplit ?(max = 0) sep str =
76 invalid_arg "String.nsplit: max parameter should not be negative";
78 (* If we reached the limit, OR if the pattern does not match the string
79 * at all, return the rest of the string as a single element list.
81 if max = 1 || string_find str sep = -1 then
84 let s1, s2 = split sep str in
85 let max = if max = 0 then 0 else max - 1 in
86 s1 :: nsplit ~max sep s2
91 (* || c = '\f' *) || c = '\n' || c = '\r' || c = '\t' (* || c = '\v' *)
93 let triml ?(test = isspace) str =
95 let n = ref (String.length str) in
96 while !n > 0 && test str.[!i]; do
101 else String.sub str !i !n
103 let trimr ?(test = isspace) str =
104 let n = ref (String.length str) in
105 while !n > 0 && test str.[!n-1]; do
108 if !n = String.length str then str
109 else String.sub str 0 !n
111 let trim ?(test = isspace) str =
112 trimr ~test (triml ~test str)
114 let absolute_path path =
115 if not (Filename.is_relative path) then path else Sys.getcwd () // path