module BytesLabels: sig .. end
Byte sequence operations.
val length : bytes -> int
Return the length (number of bytes) of the argument.
val get : bytes -> int -> char
get s n returns the byte at index n in argument s.
Invalid_argument if n is not a valid index in s.val set : bytes -> int -> char -> unit
set s n c modifies s in place, replacing the byte at index n with c.
Invalid_argument if n is not a valid index in s.val create : int -> bytes
create n returns a new byte sequence of length n. The sequence is uninitialized and contains arbitrary bytes.
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.
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.
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.
Invalid_argument if start and len do not designate a valid range of s.val sub_string : bytes -> pos:int -> len: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.
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.
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.
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.
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.
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.
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.
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.
Invalid_argument if i is not a valid position in s.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.
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.
Invalid_argument if i+1 is not a valid position in s.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.
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
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.
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
val equal : t -> t -> bool
The equality function for byte sequences.
val to_seq : t -> char Seq.t
Iterate on the string, in increasing index order. Modifications of the string during iteration will be reflected in the iterator.
val to_seqi : t -> (int * char) Seq.t
Iterate on the string, in increasing order, yielding indices along chars
val of_seq : char Seq.t -> t
Create a string from the generator
The functions in this section binary encode and decode integers to and from byte sequences.
All following functions raise Invalid_argument if the space needed at index i to decode or encode the integer is not available.
Little-endian (resp. big-endian) encoding means that least (resp. most) significant bytes are stored first. Big-endian is also known as network byte order. Native-endian encoding is either little-endian or big-endian depending on Sys.big_endian.
32-bit and 64-bit integers are represented by the int32 and int64 types, which can be interpreted either as signed or unsigned numbers.
8-bit and 16-bit integers are represented by the int type, which has more bits than the binary encoding. These extra bits are handled as follows:
int values sign-extend (resp. zero-extend) their result.int values truncate their input to their least significant bytes.val get_uint8 : bytes -> int -> int
get_uint8 b i is b's unsigned 8-bit integer starting at byte index i.
val get_int8 : bytes -> int -> int
get_int8 b i is b's signed 8-bit integer starting at byte index i.
val get_uint16_ne : bytes -> int -> int
get_uint16_ne b i is b's native-endian unsigned 16-bit integer starting at byte index i.
val get_uint16_be : bytes -> int -> int
get_uint16_be b i is b's big-endian unsigned 16-bit integer starting at byte index i.
val get_uint16_le : bytes -> int -> int
get_uint16_le b i is b's little-endian unsigned 16-bit integer starting at byte index i.
val get_int16_ne : bytes -> int -> int
get_int16_ne b i is b's native-endian signed 16-bit integer starting at byte index i.
val get_int16_be : bytes -> int -> int
get_int16_be b i is b's big-endian signed 16-bit integer starting at byte index i.
val get_int16_le : bytes -> int -> int
get_int16_le b i is b's little-endian signed 16-bit integer starting at byte index i.
val get_int32_ne : bytes -> int -> int32
get_int32_ne b i is b's native-endian 32-bit integer starting at byte index i.
val get_int32_be : bytes -> int -> int32
get_int32_be b i is b's big-endian 32-bit integer starting at byte index i.
val get_int32_le : bytes -> int -> int32
get_int32_le b i is b's little-endian 32-bit integer starting at byte index i.
val get_int64_ne : bytes -> int -> int64
get_int64_ne b i is b's native-endian 64-bit integer starting at byte index i.
val get_int64_be : bytes -> int -> int64
get_int64_be b i is b's big-endian 64-bit integer starting at byte index i.
val get_int64_le : bytes -> int -> int64
get_int64_le b i is b's little-endian 64-bit integer starting at byte index i.
val set_uint8 : bytes -> int -> int -> unit
set_uint8 b i v sets b's unsigned 8-bit integer starting at byte index i to v.
val set_int8 : bytes -> int -> int -> unit
set_int8 b i v sets b's signed 8-bit integer starting at byte index i to v.
val set_uint16_ne : bytes -> int -> int -> unit
set_uint16_ne b i v sets b's native-endian unsigned 16-bit integer starting at byte index i to v.
val set_uint16_be : bytes -> int -> int -> unit
set_uint16_be b i v sets b's big-endian unsigned 16-bit integer starting at byte index i to v.
val set_uint16_le : bytes -> int -> int -> unit
set_uint16_le b i v sets b's little-endian unsigned 16-bit integer starting at byte index i to v.
val set_int16_ne : bytes -> int -> int -> unit
set_int16_ne b i v sets b's native-endian signed 16-bit integer starting at byte index i to v.
val set_int16_be : bytes -> int -> int -> unit
set_int16_be b i v sets b's big-endian signed 16-bit integer starting at byte index i to v.
val set_int16_le : bytes -> int -> int -> unit
set_int16_le b i v sets b's little-endian signed 16-bit integer starting at byte index i to v.
val set_int32_ne : bytes -> int -> int32 -> unit
set_int32_ne b i v sets b's native-endian 32-bit integer starting at byte index i to v.
val set_int32_be : bytes -> int -> int32 -> unit
set_int32_be b i v sets b's big-endian 32-bit integer starting at byte index i to v.
val set_int32_le : bytes -> int -> int32 -> unit
set_int32_le b i v sets b's little-endian 32-bit integer starting at byte index i to v.
val set_int64_ne : bytes -> int -> int64 -> unit
set_int64_ne b i v sets b's native-endian 64-bit integer starting at byte index i to v.
val set_int64_be : bytes -> int -> int64 -> unit
set_int64_be b i v sets b's big-endian 64-bit integer starting at byte index i to v.
val set_int64_le : bytes -> int -> int64 -> unit
set_int64_le b i v sets b's little-endian 64-bit integer starting at byte index i to v.
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