ctypes 0.11.2 · OCaml Package

Operations on C arrays.

type 'a t = 'a carray

val get : 'a t -> int -> 'a

get a n returns the nth element of the zero-indexed array a. The semantics for non-scalar types are non-copying, as for (!@).

If you rebind the CArray module to Array then you can also use the syntax a.(n) instead of Array.get a n.

Raise Invalid_argument "index out of bounds" if n is outside of the range 0 to (CArray.length a - 1).

val set : 'a t -> int -> 'a -> unit

set a n v overwrites the nth element of the zero-indexed array a with v.

If you rebind the CArray module to Array then you can also use the a.(n) <- v syntax instead of Array.set a n v.

Raise Invalid_argument "index out of bounds" if n is outside of the range 0 to (CArray.length a - 1).

val unsafe_get : 'a t -> int -> 'a

unsafe_get a n behaves like get a n except that the check that n between 0 and (CArray.length a - 1) is not performed.

val unsafe_set : 'a t -> int -> 'a -> unit

unsafe_set a n v behaves like set a n v except that the check that n between 0 and (CArray.length a - 1) is not performed.

val of_list : 'a typ -> 'a list -> 'a t

of_list t l builds an array of type t of the same length as l, and writes the elements of l to the corresponding elements of the array.

val to_list : 'a t -> 'a list

to_list a builds a list of the same length as a such that each element of the list is the result of reading the corresponding element of a.

val iter : ('a -> unit) -> 'a t -> unit

iter f a is analogous to Array.iter f a: it applies f in turn to all the elements of a.

val map : 'b typ -> ('a -> 'b) -> 'a t -> 'b t

map t f a is analogous to Array.map f a: it creates a new array with element type t whose elements are obtained by applying f to the elements of a].

val mapi : 'b typ -> (int -> 'a -> 'b) -> 'a t -> 'b t

mapi behaves like Array.mapi, except that it also passes the index of each element as the first argument to f and the element itself as the second argument.

val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a

CArray.fold_left (@) x a computes (((x @ a.(0)) @ a.(1)) ...) @ a.(n-1) where n is the length of the array a.

val fold_right : ('b -> 'a -> 'a) -> 'b t -> 'a -> 'a

CArray.fold_right f a x computes a.(0) @ (a.(1) @ ( ... (a.(n-1) @ x) ...)) where n is the length of the array a.

val length : 'a t -> int

Return the number of elements of the given array.

val start : 'a t -> 'a ptr

Return the address of the first element of the given array.

val from_ptr : 'a ptr -> int -> 'a t

from_ptr p n creates an n-length array reference to the memory at address p.

val make : ?finalise:('a t -> unit) -> 'a typ -> ?initial:'a -> int -> 'a t

make t n creates an n-length array of type t. If the optional argument ?initial is supplied, it indicates a value that should be used to initialise every element of the array. The argument ?finalise, if present, will be called just before the memory is freed.

val copy : 'a t -> 'a t

copy a creates a fresh array with the same elements as a.

val sub : 'a t -> pos:int -> length:int -> 'a t

sub a ~pos ~length creates a fresh array of length length containing the elements a.(pos) to a.(pos + length - 1) of a.

Raise Invalid_argument "CArray.sub" if pos and length do not designate a valid subarray of a.

val element_type : 'a t -> 'a typ

Retrieve the element type of an array.

package ctypes