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