161 lines
6.8 KiB
OCaml
161 lines
6.8 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* Objective Caml *)
|
|
(* *)
|
|
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
|
|
(* *)
|
|
(* Copyright 1996 Institut National de Recherche en Informatique et *)
|
|
(* en Automatique. All rights reserved. This file is distributed *)
|
|
(* under the terms of the GNU Library General Public License, with *)
|
|
(* the special exception on linking described in file ../LICENSE. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
|
|
(* $Id$ *)
|
|
|
|
(** String operations. *)
|
|
|
|
external length : string -> int = "%string_length"
|
|
(** Return the length (number of characters) of the given string. *)
|
|
|
|
external get : string -> int -> char = "%string_safe_get"
|
|
(** [String.get s n] returns character number [n] in string [s].
|
|
The first character is character number 0.
|
|
The last character is character number [String.length s - 1].
|
|
Raise [Invalid_argument] if [n] is outside the range
|
|
0 to [(String.length s - 1)].
|
|
You can also write [s.[n]] instead of [String.get s n]. *)
|
|
|
|
external set : string -> int -> char -> unit = "%string_safe_set"
|
|
(** [String.set s n c] modifies string [s] in place,
|
|
replacing the character number [n] by [c].
|
|
Raise [Invalid_argument] if [n] is outside the range
|
|
0 to [(String.length s - 1)].
|
|
You can also write [s.[n] <- c] instead of [String.set s n c]. *)
|
|
|
|
external create : int -> string = "create_string"
|
|
(** [String.create n] returns a fresh string of length [n].
|
|
The string initially contains arbitrary characters.
|
|
Raise [Invalid_argument] if [n < 0] or [n > Sys.max_string_length].
|
|
*)
|
|
|
|
val make : int -> char -> string
|
|
(** [String.make n c] returns a fresh string of length [n],
|
|
filled with the character [c].
|
|
Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}.*)
|
|
|
|
val copy : string -> string
|
|
(** Return a copy of the given string. *)
|
|
|
|
val sub : string -> int -> int -> string
|
|
(** [String.sub s start len] returns a fresh string of length [len],
|
|
containing the characters number [start] to [start + len - 1]
|
|
of string [s].
|
|
Raise [Invalid_argument] if [start] and [len] do not
|
|
designate a valid substring of [s]; that is, if [start < 0],
|
|
or [len < 0], or [start + len > ]{!String.length}[ s]. *)
|
|
|
|
val fill : string -> int -> int -> char -> unit
|
|
(** [String.fill s start len c] modifies string [s] in place,
|
|
replacing the characters number [start] to [start + len - 1]
|
|
by [c].
|
|
Raise [Invalid_argument] if [start] and [len] do not
|
|
designate a valid substring of [s]. *)
|
|
|
|
val blit : string -> int -> string -> int -> int -> unit
|
|
(** [String.blit src srcoff dst dstoff len] copies [len] characters
|
|
from string [src], starting at character number [srcoff], to
|
|
string [dst], starting at character number [dstoff]. It works
|
|
correctly even if [src] and [dst] are the same string,
|
|
and the source and destination chunks overlap.
|
|
Raise [Invalid_argument] if [srcoff] and [len] do not
|
|
designate a valid substring of [src], or if [dstoff] and [len]
|
|
do not designate a valid substring of [dst]. *)
|
|
|
|
val concat : string -> string list -> string
|
|
(** [String.concat sep sl] concatenates the list of strings [sl],
|
|
inserting the separator string [sep] between each. *)
|
|
|
|
val iter : (char -> unit) -> string -> unit
|
|
(** [String.iter f s] applies function [f] in turn to all
|
|
the characters of [s]. It is equivalent to
|
|
[f s.(0); f s.(1); ...; f s.(String.length s - 1); ()]. *)
|
|
|
|
val escaped : string -> string
|
|
(** Return a copy of the argument, with special characters
|
|
represented by escape sequences, following the lexical
|
|
conventions of Objective Caml. If there is no special
|
|
character in the argument, return the original string itself,
|
|
not a copy. *)
|
|
|
|
val index : string -> char -> int
|
|
(** [String.index s c] returns the position of the leftmost
|
|
occurrence of character [c] in string [s].
|
|
Raise [Not_found] if [c] does not occur in [s]. *)
|
|
|
|
val rindex : string -> char -> int
|
|
(** [String.rindex s c] returns the position of the rightmost
|
|
occurrence of character [c] in string [s].
|
|
Raise [Not_found] if [c] does not occur in [s]. *)
|
|
|
|
val index_from : string -> int -> char -> int
|
|
(** Same as {!String.index}, but start
|
|
searching at the character position given as second argument.
|
|
[String.index s c] is equivalent to [String.index_from s 0 c].*)
|
|
|
|
val rindex_from : string -> int -> char -> int
|
|
(** Same as {!String.rindex}, but start
|
|
searching at the character position given as second argument.
|
|
[String.rindex s c] is equivalent to
|
|
[String.rindex_from s (String.length s - 1) c]. *)
|
|
|
|
val contains : string -> char -> bool
|
|
(** [String.contains s c] tests if character [c]
|
|
appears in the string [s]. *)
|
|
|
|
val contains_from : string -> int -> char -> bool
|
|
(** [String.contains_from s start c] tests if character [c]
|
|
appears in the substring of [s] starting from [start] to the end
|
|
of [s].
|
|
Raise [Invalid_argument] if [start] is not a valid index of [s]. *)
|
|
|
|
val rcontains_from : string -> int -> char -> bool
|
|
(** [String.rcontains_from s stop c] tests if character [c]
|
|
appears in the substring of [s] starting from the beginning
|
|
of [s] to index [stop].
|
|
Raise [Invalid_argument] if [stop] is not a valid index of [s]. *)
|
|
|
|
val uppercase : string -> string
|
|
(** Return a copy of the argument, with all lowercase letters
|
|
translated to uppercase, including accented letters of the ISO
|
|
Latin-1 (8859-1) character set. *)
|
|
|
|
val lowercase : string -> string
|
|
(** Return a copy of the argument, with all uppercase letters
|
|
translated to lowercase, including accented letters of the ISO
|
|
Latin-1 (8859-1) character set. *)
|
|
|
|
val capitalize : string -> string
|
|
(** Return a copy of the argument, with the first letter set to uppercase. *)
|
|
|
|
val uncapitalize : string -> string
|
|
(** Return a copy of the argument, with the first letter set to lowercase. *)
|
|
|
|
type t = string
|
|
(** An alias for the type of strings. *)
|
|
|
|
val compare: t -> t -> int
|
|
(** The comparison function for strings, with the same specification as
|
|
{!Pervasives.compare}. Along with the type [t], this function [compare]
|
|
allows the module [String] to be passed as argument to the functors
|
|
{!Set.Make} and {!Map.Make}. *)
|
|
|
|
(**/**)
|
|
|
|
external unsafe_get : string -> int -> char = "%string_unsafe_get"
|
|
external unsafe_set : string -> int -> char -> unit = "%string_unsafe_set"
|
|
external unsafe_blit :
|
|
string -> int -> string -> int -> int -> unit = "blit_string" "noalloc"
|
|
external unsafe_fill :
|
|
string -> int -> int -> char -> unit = "fill_string" "noalloc"
|