324 lines
13 KiB
OCaml
324 lines
13 KiB
OCaml
(**************************************************************************)
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(* *)
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(* OCaml *)
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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. *)
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(* *)
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(* All rights reserved. This file is distributed under the terms of *)
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(* the GNU Lesser General Public License version 2.1, with the *)
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(* special exception on linking described in the file LICENSE. *)
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(* *)
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(**************************************************************************)
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(** Byte sequence operations.
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@since 4.02.0
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*)
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external length : bytes -> int = "%bytes_length"
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(** Return the length (number of bytes) of the argument. *)
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external get : bytes -> int -> char = "%bytes_safe_get"
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(** [get s n] returns the byte at index [n] in argument [s].
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Raise [Invalid_argument] if [n] is not a valid index in [s]. *)
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external set : bytes -> int -> char -> unit = "%bytes_safe_set"
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(** [set s n c] modifies [s] in place, replacing the byte at index [n]
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with [c].
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Raise [Invalid_argument] if [n] is not a valid index in [s]. *)
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external create : int -> bytes = "caml_create_bytes"
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(** [create n] returns a new byte sequence of length [n]. The
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sequence is uninitialized and contains arbitrary bytes.
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Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}. *)
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val make : int -> char -> bytes
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(** [make n c] returns a new byte sequence of length [n], filled with
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the byte [c].
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Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}. *)
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val init : int -> f:(int -> char) -> bytes
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(** [init n f] returns a fresh byte sequence of length [n],
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with character [i] initialized to the result of [f i].
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Raise [Invalid_argument] if [n < 0] or [n > ]{!Sys.max_string_length}. *)
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val empty : bytes
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(** A byte sequence of size 0. *)
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val copy : bytes -> bytes
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(** Return a new byte sequence that contains the same bytes as the
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argument. *)
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val of_string : string -> bytes
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(** Return a new byte sequence that contains the same bytes as the
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given string. *)
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val to_string : bytes -> string
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(** Return a new string that contains the same bytes as the given byte
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sequence. *)
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val sub : bytes -> pos:int -> len:int -> bytes
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(** [sub s start len] returns a new byte sequence of length [len],
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containing the subsequence of [s] that starts at position [start]
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and has length [len].
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Raise [Invalid_argument] if [start] and [len] do not designate a
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valid range of [s]. *)
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val sub_string : bytes -> pos:int -> len:int -> string
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(** Same as [sub] but return a string instead of a byte sequence. *)
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val extend : bytes -> left:int -> right:int -> bytes
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(** [extend s left right] returns a new byte sequence that contains
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the bytes of [s], with [left] uninitialized bytes prepended and
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[right] uninitialized bytes appended to it. If [left] or [right]
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is negative, then bytes are removed (instead of appended) from
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the corresponding side of [s].
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Raise [Invalid_argument] if the result length is negative or
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longer than {!Sys.max_string_length} bytes.
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@since 4.05.0 *)
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val fill : bytes -> pos:int -> len:int -> char -> unit
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(** [fill s start len c] modifies [s] in place, replacing [len]
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characters with [c], starting at [start].
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Raise [Invalid_argument] if [start] and [len] do not designate a
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valid range of [s]. *)
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val blit :
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src:bytes -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int
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-> unit
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(** [blit src srcoff dst dstoff len] copies [len] bytes from sequence
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[src], starting at index [srcoff], to sequence [dst], starting at
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index [dstoff]. It works correctly even if [src] and [dst] are the
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same byte sequence, and the source and destination intervals
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overlap.
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Raise [Invalid_argument] if [srcoff] and [len] do not
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designate a valid range of [src], or if [dstoff] and [len]
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do not designate a valid range of [dst]. *)
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val blit_string :
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src:string -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int
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-> unit
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(** [blit src srcoff dst dstoff len] copies [len] bytes from string
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[src], starting at index [srcoff], to byte sequence [dst],
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starting at index [dstoff].
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Raise [Invalid_argument] if [srcoff] and [len] do not
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designate a valid range of [src], or if [dstoff] and [len]
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do not designate a valid range of [dst].
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@since 4.05.0 *)
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val concat : sep:bytes -> bytes list -> bytes
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(** [concat sep sl] concatenates the list of byte sequences [sl],
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inserting the separator byte sequence [sep] between each, and
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returns the result as a new byte sequence. *)
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val cat : bytes -> bytes -> bytes
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(** [cat s1 s2] concatenates [s1] and [s2] and returns the result
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as new byte sequence.
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Raise [Invalid_argument] if the result is longer than
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{!Sys.max_string_length} bytes.
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@since 4.05.0 *)
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val iter : f:(char -> unit) -> bytes -> unit
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(** [iter f s] applies function [f] in turn to all the bytes of [s].
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It is equivalent to [f (get s 0); f (get s 1); ...; f (get s
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(length s - 1)); ()]. *)
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val iteri : f:(int -> char -> unit) -> bytes -> unit
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(** Same as {!Bytes.iter}, but the function is applied to the index of
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the byte as first argument and the byte itself as second
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argument. *)
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val map : f:(char -> char) -> bytes -> bytes
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(** [map f s] applies function [f] in turn to all the bytes of [s] and
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stores the resulting bytes in a new sequence that is returned as
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the result. *)
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val mapi : f:(int -> char -> char) -> bytes -> bytes
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(** [mapi f s] calls [f] with each character of [s] and its
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index (in increasing index order) and stores the resulting bytes
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in a new sequence that is returned as the result. *)
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val trim : bytes -> bytes
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(** Return a copy of the argument, without leading and trailing
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whitespace. The bytes regarded as whitespace are the ASCII
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characters [' '], ['\012'], ['\n'], ['\r'], and ['\t']. *)
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val escaped : bytes -> bytes
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(** Return a copy of the argument, with special characters represented
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by escape sequences, following the lexical conventions of OCaml. *)
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val index : bytes -> char -> int
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(** [index s c] returns the index of the first occurrence of byte [c]
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in [s].
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Raise [Not_found] if [c] does not occur in [s]. *)
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val index_opt: bytes -> char -> int option
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(** [index_opt s c] returns the index of the first occurrence of byte [c]
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in [s] or [None] if [c] does not occur in [s].
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@since 4.05 *)
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val rindex : bytes -> char -> int
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(** [rindex s c] returns the index of the last occurrence of byte [c]
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in [s].
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Raise [Not_found] if [c] does not occur in [s]. *)
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val rindex_opt: bytes -> char -> int option
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(** [rindex_opt s c] returns the index of the last occurrence of byte [c]
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in [s] or [None] if [c] does not occur in [s].
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@since 4.05 *)
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val index_from : bytes -> int -> char -> int
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(** [index_from s i c] returns the index of the first occurrence of
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byte [c] in [s] after position [i]. [Bytes.index s c] is
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equivalent to [Bytes.index_from s 0 c].
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Raise [Invalid_argument] if [i] is not a valid position in [s].
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Raise [Not_found] if [c] does not occur in [s] after position [i]. *)
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val index_from_opt: bytes -> int -> char -> int option
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(** [index_from _opts i c] returns the index of the first occurrence of
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byte [c] in [s] after position [i] or [None] if [c] does not occur in [s]
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after position [i].
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[Bytes.index_opt s c] is equivalent to [Bytes.index_from_opt s 0 c].
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Raise [Invalid_argument] if [i] is not a valid position in [s].
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@since 4.05 *)
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val rindex_from : bytes -> int -> char -> int
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(** [rindex_from s i c] returns the index of the last occurrence of
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byte [c] in [s] before position [i+1]. [rindex s c] is equivalent
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to [rindex_from s (Bytes.length s - 1) c].
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Raise [Invalid_argument] if [i+1] is not a valid position in [s].
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Raise [Not_found] if [c] does not occur in [s] before position [i+1]. *)
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val rindex_from_opt: bytes -> int -> char -> int option
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(** [rindex_from_opt s i c] returns the index of the last occurrence
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of byte [c] in [s] before position [i+1] or [None] if [c] does not
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occur in [s] before position [i+1]. [rindex_opt s c] is equivalent to
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[rindex_from s (Bytes.length s - 1) c].
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Raise [Invalid_argument] if [i+1] is not a valid position in [s].
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@since 4.05 *)
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val contains : bytes -> char -> bool
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(** [contains s c] tests if byte [c] appears in [s]. *)
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val contains_from : bytes -> int -> char -> bool
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(** [contains_from s start c] tests if byte [c] appears in [s] after
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position [start]. [contains s c] is equivalent to [contains_from
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s 0 c].
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Raise [Invalid_argument] if [start] is not a valid position in [s]. *)
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val rcontains_from : bytes -> int -> char -> bool
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(** [rcontains_from s stop c] tests if byte [c] appears in [s] before
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position [stop+1].
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Raise [Invalid_argument] if [stop < 0] or [stop+1] is not a valid
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position in [s]. *)
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val uppercase : bytes -> bytes
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[@@ocaml.deprecated "Use Bytes.uppercase_ascii instead."]
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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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@deprecated Functions operating on Latin-1 character set are deprecated. *)
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val lowercase : bytes -> bytes
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[@@ocaml.deprecated "Use Bytes.lowercase_ascii instead."]
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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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@deprecated Functions operating on Latin-1 character set are deprecated. *)
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val capitalize : bytes -> bytes
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[@@ocaml.deprecated "Use Bytes.capitalize_ascii instead."]
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(** Return a copy of the argument, with the first character set to uppercase,
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using the ISO Latin-1 (8859-1) character set..
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@deprecated Functions operating on Latin-1 character set are deprecated. *)
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val uncapitalize : bytes -> bytes
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[@@ocaml.deprecated "Use Bytes.uncapitalize_ascii instead."]
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(** Return a copy of the argument, with the first character set to lowercase,
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using the ISO Latin-1 (8859-1) character set..
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@deprecated Functions operating on Latin-1 character set are deprecated. *)
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val uppercase_ascii : bytes -> bytes
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(** Return a copy of the argument, with all lowercase letters
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translated to uppercase, using the US-ASCII character set.
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@since 4.05.0 *)
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val lowercase_ascii : bytes -> bytes
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(** Return a copy of the argument, with all uppercase letters
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translated to lowercase, using the US-ASCII character set.
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@since 4.05.0 *)
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val capitalize_ascii : bytes -> bytes
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(** Return a copy of the argument, with the first character set to uppercase,
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using the US-ASCII character set.
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@since 4.05.0 *)
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val uncapitalize_ascii : bytes -> bytes
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(** Return a copy of the argument, with the first character set to lowercase,
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using the US-ASCII character set.
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@since 4.05.0 *)
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type t = bytes
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(** An alias for the type of byte sequences. *)
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val compare: t -> t -> int
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(** The comparison function for byte sequences, with the same
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specification as {!Stdlib.compare}. Along with the type [t],
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this function [compare] allows the module [Bytes] to be passed as
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argument to the functors {!Set.Make} and {!Map.Make}. *)
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val equal: t -> t -> bool
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(** The equality function for byte sequences.
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@since 4.05.0 *)
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(** {6 Iterators} *)
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val to_seq : t -> char Seq.t
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(** Iterate on the string, in increasing index order. Modifications of the
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string during iteration will be reflected in the iterator.
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@since 4.07 *)
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val to_seqi : t -> (int * char) Seq.t
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(** Iterate on the string, in increasing order, yielding indices along chars
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@since 4.07 *)
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val of_seq : char Seq.t -> t
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(** Create a string from the generator
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@since 4.07 *)
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(**/**)
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(* The following is for system use only. Do not call directly. *)
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external unsafe_get : bytes -> int -> char = "%bytes_unsafe_get"
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external unsafe_set : bytes -> int -> char -> unit = "%bytes_unsafe_set"
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external unsafe_blit :
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src:bytes -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int ->
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unit = "caml_blit_bytes" [@@noalloc]
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external unsafe_fill :
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bytes -> pos:int -> len:int -> char -> unit = "caml_fill_bytes" [@@noalloc]
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val unsafe_to_string : bytes -> string
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val unsafe_of_string : string -> bytes
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