Module Stdlib.BytesLabels

Byte sequence operations.

external length : bytes -> int = "%bytes_length"

Return the length (number of bytes) of the argument.

external get : bytes -> int -> char = "%bytes_safe_get"

get s n returns the byte at index n in argument s.

Raise Invalid_argument if n is not a valid index in s.

external set : bytes -> int -> char -> unit = "%bytes_safe_set"

set s n c modifies s in place, replacing the byte at index n with c.

Raise Invalid_argument if n is not a valid index in s.

external create : int -> bytes = "caml_create_bytes"

create n returns a new byte sequence of length n. The sequence is uninitialized and contains arbitrary bytes.

Raise Invalid_argument if n < 0 or n > Sys.max_string_length.

val make : int -> char -> bytes

make n c returns a new byte sequence of length n, filled with the byte c.

Raise Invalid_argument if n < 0 or n > Sys.max_string_length.

val init : int -> f:(int -> char) -> bytes

init n f returns a fresh byte sequence of length n, with character i initialized to the result of f i.

Raise Invalid_argument if n < 0 or n > Sys.max_string_length.

val empty : bytes

A byte sequence of size 0.

val copy : bytes -> bytes

Return a new byte sequence that contains the same bytes as the argument.

val of_string : string -> bytes

Return a new byte sequence that contains the same bytes as the given string.

val to_string : bytes -> string

Return a new string that contains the same bytes as the given byte sequence.

val sub : bytes -> pos:int -> len:int -> bytes

sub s start len returns a new byte sequence of length len, containing the subsequence of s that starts at position start and has length len.

Raise Invalid_argument if start and len do not designate a valid range of s.

val sub_string : bytes -> int -> int -> string

Same as sub but return a string instead of a byte sequence.

val extend : bytes -> left:int -> right:int -> bytes

extend s left right returns a new byte sequence that contains the bytes of s, with left uninitialized bytes prepended and right uninitialized bytes appended to it. If left or right is negative, then bytes are removed (instead of appended) from the corresponding side of s.

Raise Invalid_argument if the result length is negative or longer than Sys.max_string_length bytes.

val fill : bytes -> pos:int -> len:int -> char -> unit

fill s start len c modifies s in place, replacing len characters with c, starting at start.

Raise Invalid_argument if start and len do not designate a valid range of s.

val blit : src:bytes -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit

blit src srcoff dst dstoff len copies len bytes from sequence src, starting at index srcoff, to sequence dst, starting at index dstoff. It works correctly even if src and dst are the same byte sequence, and the source and destination intervals overlap.

Raise Invalid_argument if srcoff and len do not designate a valid range of src, or if dstoff and len do not designate a valid range of dst.

val blit_string : src:string -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit

blit src srcoff dst dstoff len copies len bytes from string src, starting at index srcoff, to byte sequence dst, starting at index dstoff.

Raise Invalid_argument if srcoff and len do not designate a valid range of src, or if dstoff and len do not designate a valid range of dst.

val concat : sep:bytes -> bytes list -> bytes

concat sep sl concatenates the list of byte sequences sl, inserting the separator byte sequence sep between each, and returns the result as a new byte sequence.

val cat : bytes -> bytes -> bytes

cat s1 s2 concatenates s1 and s2 and returns the result as new byte sequence.

Raise Invalid_argument if the result is longer than Sys.max_string_length bytes.

val iter : f:(char -> unit) -> bytes -> unit

iter f s applies function f in turn to all the bytes of s. It is equivalent to f (get s 0); f (get s 1); ...; f (get s (length s - 1)); ().

val iteri : f:(int -> char -> unit) -> bytes -> unit

Same as Bytes.iter, but the function is applied to the index of the byte as first argument and the byte itself as second argument.

val map : f:(char -> char) -> bytes -> bytes

map f s applies function f in turn to all the bytes of s and stores the resulting bytes in a new sequence that is returned as the result.

val mapi : f:(int -> char -> char) -> bytes -> bytes

mapi f s calls f with each character of s and its index (in increasing index order) and stores the resulting bytes in a new sequence that is returned as the result.

val trim : bytes -> bytes

Return a copy of the argument, without leading and trailing whitespace. The bytes regarded as whitespace are the ASCII characters ' ', '\012', '\n', '\r', and '\t'.

val escaped : bytes -> bytes

Return a copy of the argument, with special characters represented by escape sequences, following the lexical conventions of OCaml.

val index : bytes -> char -> int

index s c returns the index of the first occurrence of byte c in s.

Raise Not_found if c does not occur in s.

val index_opt : bytes -> char -> int option

index_opt s c returns the index of the first occurrence of byte c in s or None if c does not occur in s.

val rindex : bytes -> char -> int

rindex s c returns the index of the last occurrence of byte c in s.

Raise Not_found if c does not occur in s.

val rindex_opt : bytes -> char -> int option

rindex_opt s c returns the index of the last occurrence of byte c in s or None if c does not occur in s.

val index_from : bytes -> int -> char -> int

index_from s i c returns the index of the first occurrence of byte c in s after position i. Bytes.index s c is equivalent to Bytes.index_from s 0 c.

Raise Invalid_argument if i is not a valid position in s. Raise Not_found if c does not occur in s after position i.

val index_from_opt : bytes -> int -> char -> int option

index_from _opts i c returns the index of the first occurrence of byte c in s after position i or None if c does not occur in s after position i. Bytes.index_opt s c is equivalent to Bytes.index_from_opt s 0 c.

Raise Invalid_argument if i is not a valid position in s.

val rindex_from : bytes -> int -> char -> int

rindex_from s i c returns the index of the last occurrence of byte c in s before position i+1. rindex s c is equivalent to rindex_from s (Bytes.length s - 1) c.

Raise Invalid_argument if i+1 is not a valid position in s. Raise Not_found if c does not occur in s before position i+1.

val rindex_from_opt : bytes -> int -> char -> int option

rindex_from_opt s i c returns the index of the last occurrence of byte c in s before position i+1 or None if c does not occur in s before position i+1. rindex_opt s c is equivalent to rindex_from s (Bytes.length s - 1) c.

Raise Invalid_argument if i+1 is not a valid position in s.

val contains : bytes -> char -> bool

contains s c tests if byte c appears in s.

val contains_from : bytes -> int -> char -> bool

contains_from s start c tests if byte c appears in s after position start. contains s c is equivalent to contains_from s 0 c.

Raise Invalid_argument if start is not a valid position in s.

val rcontains_from : bytes -> int -> char -> bool

rcontains_from s stop c tests if byte c appears in s before position stop+1.

Raise Invalid_argument if stop < 0 or stop+1 is not a valid position in s.

val uppercase : bytes -> bytes

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 : bytes -> bytes

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 : bytes -> bytes

Return a copy of the argument, with the first character set to uppercase, using the ISO Latin-1 (8859-1) character set..

val uncapitalize : bytes -> bytes

Return a copy of the argument, with the first character set to lowercase, using the ISO Latin-1 (8859-1) character set..

val uppercase_ascii : bytes -> bytes

Return a copy of the argument, with all lowercase letters translated to uppercase, using the US-ASCII character set.

val lowercase_ascii : bytes -> bytes

Return a copy of the argument, with all uppercase letters translated to lowercase, using the US-ASCII character set.

val capitalize_ascii : bytes -> bytes

Return a copy of the argument, with the first character set to uppercase, using the US-ASCII character set.

val uncapitalize_ascii : bytes -> bytes

Return a copy of the argument, with the first character set to lowercase, using the US-ASCII character set.

type t = bytes

An alias for the type of byte sequences.

val compare : t -> t -> int

The comparison function for byte sequences, with the same specification as Pervasives.compare. Along with the type t, this function compare allows the module Bytes to be passed as argument to the functors Set.Make and Map.Make.

val equal : t -> t -> bool

The equality function for byte sequences.

external unsafe_get : bytes -> int -> char = "%bytes_unsafe_get"
external unsafe_set : bytes -> int -> char -> unit = "%bytes_unsafe_set"
external unsafe_blit : src:bytes -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit = "caml_blit_bytes"
external unsafe_fill : bytes -> pos:int -> len:int -> char -> unit = "caml_fill_bytes"
val unsafe_to_string : bytes -> string
val unsafe_of_string : string -> bytes