Introduce String.{take,drop,split_n}
This simplifies quite a lot of code Signed-off-by: Rudi Grinberg <rudi.grinberg@gmail.com>
This commit is contained in:
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b7da0304f1
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2cfd38c199
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@ -695,7 +695,7 @@ let resolve_target common ~(setup : Main.setup) s =
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else
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(1, true)
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in
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let s = String.sub s ~pos ~len:(String.length s - pos) in
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let s = String.drop s pos in
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let path = Path.relative Path.root (prefix_target common s) in
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check_path setup.contexts path;
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if Path.is_root path then
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@ -23,8 +23,9 @@ let create (context : Context.t) ~public_libs l ~f =
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| None -> Filename.basename src
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in
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let key =
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if Sys.win32 && Filename.extension name = ".exe" then
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String.sub name ~pos:0 ~len:(String.length name - 4)
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if Sys.win32 then
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Option.value ~default:name
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(String.drop_suffix name ~suffix:".exe")
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else
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name
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in
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@ -557,7 +557,7 @@ module Of_sexp = struct
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let if_paren_colon_form ~then_ ~else_ =
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peek_exn >>= function
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| List (_, Atom (loc, A s) :: _) when String.is_prefix s ~prefix:":" ->
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let name = String.sub s ~pos:1 ~len:(String.length s - 1) in
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let name = String.drop s 1 in
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enter
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(junk >>= fun () ->
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then_ >>| fun f ->
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@ -614,8 +614,7 @@ module Lib_dep = struct
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~before:(let%map s = string in
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let len = String.length s in
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if len > 0 && s.[0] = '!' then
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let s = String.sub s ~pos:1 ~len:(len - 1) in
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Right s
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Right (String.drop s 1)
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else
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Left s)
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~after:file
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@ -200,7 +200,7 @@ let path t = t.path
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let root_package_name s =
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match String.index s '.' with
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| None -> s
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| Some i -> String.sub s ~pos:0 ~len:i
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| Some i -> String.take s i
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let dummy_package t ~name =
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let dir =
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@ -223,8 +223,7 @@ let parse_package t ~meta_file ~name ~parent_dir ~vars =
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| None | Some "" -> parent_dir
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| Some pkg_dir ->
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if pkg_dir.[0] = '+' || pkg_dir.[0] = '^' then
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Path.relative t.stdlib_dir
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(String.sub pkg_dir ~pos:1 ~len:(String.length pkg_dir - 1))
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Path.relative t.stdlib_dir (String.drop pkg_dir 1)
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else if Filename.is_relative pkg_dir then
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Path.relative parent_dir pkg_dir
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else
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@ -102,8 +102,7 @@ module Gen(P : Params) = struct
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List.iter template ~f:(fun s ->
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if String.is_prefix s ~prefix:"#" then
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match
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String.extract_blank_separated_words
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(String.sub s ~pos:1 ~len:(String.length s - 1))
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String.extract_blank_separated_words (String.drop s 1)
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with
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| ["JBUILDER_GEN" | "DUNE_GEN"] ->
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Format.fprintf ppf "%a@," Meta.pp meta.entries
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@ -6,13 +6,11 @@ let parse_sub_systems ~parsing_context sexps =
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Dsexp.Of_sexp.(parse (triple string (located Syntax.Version.dparse) raw)
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parsing_context) sexp
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in
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match Sub_system_name.get name with
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| None ->
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(* We ignore sub-systems that are not internally known. These
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correspond to plugins that are not in use in the current
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workspace. *)
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None
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| Some name -> Some (name, (Dsexp.Ast.loc sexp, ver, data)))
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(* We ignore sub-systems that are not internally known. These
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correspond to plugins that are not in use in the current
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workspace. *)
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Option.bind (Sub_system_name.get name) ~f:(fun name ->
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Some (name, (Dsexp.Ast.loc sexp, ver, data)))
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|> Sub_system_name.Map.of_list
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|> (function
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| Ok x -> x
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@ -72,7 +72,7 @@ let make ?impl ?intf ?obj_name name =
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let fn = Path.basename file.path in
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match String.index fn '.' with
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| None -> fn
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| Some i -> String.sub fn ~pos:0 ~len:i
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| Some i -> String.take fn i
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in
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{ name
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; impl
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@ -215,12 +215,9 @@ module Vars = struct
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match String.index line ':' with
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| Some i ->
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let x =
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(String.sub line ~pos:0 ~len:i,
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let len = String.length line - i - 2 in
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if len < 0 then
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""
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else
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String.sub line ~pos:(i + 2) ~len)
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( String.take line i
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, String.drop line (i + 2) (* skipping the space *)
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)
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in
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loop (x :: acc) lines
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| None ->
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@ -90,36 +90,30 @@ let parse_deps cctx ~file ~unit lines =
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match lines with
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| [] | _ :: _ :: _ -> invalid ()
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| [line] ->
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match String.index line ':' with
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match String.lsplit2 line ~on:':' with
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| None -> invalid ()
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| Some i ->
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let basename =
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String.sub line ~pos:0 ~len:i
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|> Filename.basename
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in
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| Some (basename, deps) ->
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let basename = Filename.basename basename in
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if basename <> Path.basename file then invalid ();
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let deps =
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String.extract_blank_separated_words
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(String.sub line ~pos:(i + 1) ~len:(String.length line - (i + 1)))
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String.extract_blank_separated_words deps
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|> parse_module_names ~unit ~modules
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in
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(match lib_interface_module with
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| None -> ()
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| Some (m : Module.t) ->
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let open Module.Name.Infix in
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if unit.name <> m.name && not (is_alias_module cctx unit) &&
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List.exists deps ~f:(fun x -> Module.name x = m.name) then
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die "Module %a in directory %s depends on %a.\n\
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This doesn't make sense to me.\n\
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\n\
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%a is the main module of the library and is \
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the only module exposed \n\
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outside of the library. Consequently, it should \
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be the one depending \n\
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on all the other modules in the library."
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Module.Name.pp unit.name (Path.to_string dir)
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Module.Name.pp m.name
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Module.Name.pp m.name);
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Option.iter lib_interface_module ~f:(fun (m : Module.t) ->
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let open Module.Name.Infix in
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if unit.name <> m.name && not (is_alias_module cctx unit) &&
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List.exists deps ~f:(fun x -> Module.name x = m.name) then
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die "Module %a in directory %s depends on %a.\n\
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This doesn't make sense to me.\n\
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\n\
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%a is the main module of the library and is \
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the only module exposed \n\
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outside of the library. Consequently, it should \
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be the one depending \n\
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on all the other modules in the library."
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Module.Name.pp unit.name (Path.to_string dir)
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Module.Name.pp m.name
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Module.Name.pp m.name);
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match alias_module with
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| None -> deps
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| Some m -> m :: deps
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@ -92,8 +92,8 @@ module Fancy = struct
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| exception _ -> prog_end
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| i -> i
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in
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let before = String.sub s ~pos:0 ~len:prog_start in
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let after = String.sub s ~pos:prog_end ~len:(len - prog_end) in
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let before = String.take s prog_start in
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let after = String.drop s prog_end in
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let prog = String.sub s ~pos:prog_start ~len:(prog_end - prog_start) in
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before, prog, after
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end
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@ -169,7 +169,7 @@ let go ?(log=Log.no_log) ?(config=Config.default)
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String.drop_prefix p ~prefix:of_
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with
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| None | Some "" -> None
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| Some s -> Some (String.sub s ~pos:1 ~len:(String.length s - 1))
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| Some s -> Some (String.drop s 1)
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in
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match descendant_simple cwd ~of_:initial_cwd with
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| Some s -> s
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@ -37,8 +37,7 @@ let extension_start =
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let split_extension fn =
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let i = extension_start fn in
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(String.sub fn ~pos:0 ~len:i,
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String.sub fn ~pos:i ~len:(String.length fn - i))
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String.split_n fn i
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let split_extension_after_dot fn =
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let i = extension_start fn + 1 in
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if i > len then
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(fn, "")
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else
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(String.sub fn ~pos:0 ~len:i,
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String.sub fn ~pos:i ~len:(String.length fn - i))
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String.split_n fn i
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let extension fn =
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let i = extension_start fn in
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String.sub fn ~pos:i ~len:(String.length fn - i)
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String.drop fn (extension_start fn)
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type program_name_kind =
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| In_path
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@ -14,7 +14,7 @@ let explode_path =
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component acc path i (i - 1)
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and component acc path end_ i =
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if i < 0 then
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String.sub path ~pos:0 ~len:(end_ + 1)::acc
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String.take path (end_ + 1) :: acc
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else if is_dir_sep (String.unsafe_get path i) then
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start
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(String.sub path ~pos:(i + 1) ~len:(end_ - i)::acc)
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@ -180,7 +180,7 @@ end = struct
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let to_list =
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let rec loop t acc i j =
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if i = 0 then
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String.sub t ~pos:0 ~len:j :: acc
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String.take t j :: acc
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else
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match t.[i - 1] with
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| '/' -> loop t (String.sub t ~pos:i ~len:(j - i) :: acc) (i - 1) (i - 1)
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@ -201,7 +201,7 @@ end = struct
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let t = to_string t in
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match String.rindex_from t (String.length t - 1) '/' with
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| exception Not_found -> root
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| i -> make (String.sub t ~pos:0 ~len:i)
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| i -> make (String.take t i)
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let basename t =
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if is_root t then
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@ -322,7 +322,7 @@ end = struct
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let t_len = String.length t in
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if (t_len > of_len && t.[of_len] = '/'
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&& String.is_prefix t ~prefix:of_) then
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Some (make (String.sub t ~pos:(of_len + 1) ~len:(t_len - of_len - 1)))
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Some (make (String.drop t (of_len + 1)))
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else
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None
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@ -722,14 +722,13 @@ let extract_build_context = function
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| In_build_dir p when Local.is_root p -> None
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| In_build_dir t ->
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let t = Local.to_string t in
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begin match String.index t '/' with
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begin match String.lsplit2 t ~on:'/' with
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| None ->
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Some ( String.sub t ~pos:0 ~len:(String.length t)
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, in_source_tree Local.root )
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| Some j ->
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Some (t, in_source_tree Local.root )
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| Some (before, after) ->
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Some
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( String.sub t ~pos:0 ~len:j
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, String.sub t ~pos:(j + 1) ~len:(String.length t - j - 1)
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( before
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, after
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|> Local.of_string
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|> in_source_tree )
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end
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@ -739,12 +738,12 @@ let extract_build_context_dir = function
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| External _ -> None
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| In_build_dir t ->
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let t_str = Local.to_string t in
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begin match String.index t_str '/' with
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begin match String.lsplit2 t_str ~on:'/' with
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| None -> Some (in_build_dir t, in_source_tree Local.root)
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| Some j ->
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| Some (before, after) ->
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Some
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( in_build_dir (Local.of_string (String.sub t_str ~pos:0 ~len:j))
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, (String.sub t_str ~pos:(j + 1) ~len:(String.length t_str - j - 1))
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( in_build_dir (Local.of_string before)
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, after
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|> Local.of_string
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|> in_source_tree
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)
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@ -776,12 +775,12 @@ let split_first_component t =
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match kind t, is_root t with
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| Local t, false ->
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let t = Local.to_string t in
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begin match String.index t '/' with
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begin match String.lsplit2 t ~on:'/' with
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| None -> Some (t, root)
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| Some i ->
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| Some (before, after) ->
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Some
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( String.sub t ~pos:0 ~len:i
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, String.sub t ~pos:(i + 1) ~len:(String.length t - i - 1)
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( before
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, after
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|> Local.of_string
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|> in_source_tree )
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end
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@ -69,7 +69,7 @@ module Renderer = struct
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let extract_closing_tag s =
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let pos = 2 + get16 s 0 in
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String.sub s ~pos ~len:(String.length s - pos)
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String.drop s pos
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let rec pp th ppf t =
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@ -60,6 +60,15 @@ let drop_prefix s ~prefix =
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else
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None
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let drop_suffix s ~suffix =
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if is_suffix s ~suffix then
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if length s = length suffix then
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Some s
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else
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Some (sub s ~pos:0 ~len:(length s - length suffix))
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else
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None
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let extract_words s ~is_word_char =
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let rec skip_blanks i =
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if i = length s then
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@ -230,3 +239,21 @@ let concat ~sep = function
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| [] -> ""
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| [x] -> x
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| xs -> concat ~sep xs
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let take s len =
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sub s ~pos:0 ~len:(min (length s) len)
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let drop s n =
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let len = length s in
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sub s ~pos:(min n len) ~len:(max (len - n) 0)
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let split_n s n =
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let len = length s in
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if n > len then
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Exn.code_error "String.split_n"
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[ "s", Sexp.Atom s
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; "n", Sexp.Atom (string_of_int n)
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];
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( sub s ~pos:0 ~len:n
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, sub s ~pos:n ~len:(len - n)
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)
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@ -10,9 +10,14 @@ val is_empty : t -> bool
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val is_prefix : t -> prefix:t -> bool
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val is_suffix : t -> suffix:t -> bool
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val drop_prefix : t -> prefix:t -> t option
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val take : t -> int -> t
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val drop : t -> int -> t
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val split_n : t -> int -> t * t
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(** These only change ASCII charactes *)
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val drop_prefix : t -> prefix:t -> t option
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val drop_suffix : t -> suffix:t -> t option
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(** These only change ASCII characters *)
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val capitalize : t -> t
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val uncapitalize : t -> t
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val uppercase : t -> t
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@ -22,11 +22,7 @@ let is_a_source_file fn =
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let make_watermark_map ~name ~version ~commit =
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let opam_file = Opam_file.load (Path.in_source (name ^ ".opam")) in
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let version_num =
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if String.is_prefix version ~prefix:"v" then
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String.sub version ~pos:1 ~len:(String.length version - 1)
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else
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version
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in
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Option.value ~default:version (String.drop_prefix version ~prefix:"v") in
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let opam_var name sep =
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match Opam_file.get_field opam_file name with
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| None -> Error (sprintf "variable %S not found in opam file" name)
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