package res

  1. Overview
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Resizable buffer using the default reallocation strategy.

Includes all functions that exist in non-parameterized arrays.

Signatures and types
module Strategy = DefStrat

Module implementing the reallocation strategy

type strategy = Strategy.t

Type of reallocation strategy

type t

Type of resizable arrays

type el = char

Type of the elements in the resizable array

Index and length information
val length : t -> int

length ra

  • returns

    (virtual) length of resizable array ra excluding the reserved space.

val lix : t -> int

lix ra

  • returns

    (virtual) last index of resizable array ra excluding the reserved space.

val real_length : t -> int

real_length ra

  • returns

    (real) length of resizable array ra including the reserved space.

val real_lix : t -> int

real_lix ra

  • returns

    (real) last index of resizable array ra including the reserved space.

Getting and setting
val get : t -> int -> el

get ra n

  • returns

    the nth element of ra.

  • raises Invalid_argument

    if index out of bounds.

val set : t -> int -> el -> unit

set ra n sets the nth element of ra.

  • raises Invalid_argument

    if index out of bounds.

Creation of resizable arrays
val sempty : strategy -> t

sempty s

  • returns

    an empty resizable array using strategy s.

val empty : unit -> t

empty () same as sempty but uses default strategy.

val screate : strategy -> int -> t

screate s n

  • returns

    a resizable array with strategy s containing n arbitrary elements.

    Attention: the contents is not specified!

val create : int -> t

create n same as screate but uses default strategy.

val smake : strategy -> int -> el -> t

smake s n el

  • returns

    a resizable array of length n containing element el only using strategy s.

val make : int -> el -> t

make n el same as smake but uses default strategy.

val sinit : strategy -> int -> (int -> el) -> t

sinit s n f

  • returns

    an array of length n containing elements that were created by applying function f to the index, using strategy s.

val init : int -> (int -> el) -> t

init n f sames as sinit but uses default strategy.

Strategy handling
val get_strategy : t -> strategy

get_strategy ra

  • returns

    the reallocation strategy used by resizable array ra.

val set_strategy : t -> strategy -> unit

set_strategy ra s sets the reallocation strategy of resizable array ra to s, possibly causing an immediate reallocation.

val put_strategy : t -> strategy -> unit

put_strategy ra s sets the reallocation strategy of resizable array ra to s. Reallocation is only done at later changes in size.

val enforce_strategy : t -> unit

enforce_strategy ra forces a reallocation if necessary (e.g. after a put_strategy).

Copying, blitting and range extraction
val copy : t -> t

copy ra

  • returns

    a copy of resizable array ra. The two arrays share the same strategy!

val sub : t -> int -> int -> t

sub ra ofs len

  • returns

    a resizable subarray of length len from resizable array ra starting at offset ofs using the default strategy.

  • raises Invalid_argument

    if parameters do not denote a correct subarray.

val fill : t -> int -> int -> el -> unit

fill ra ofs len el fills resizable array ra from offset ofs with len elements el, possibly adding elements at the end. Raises Invalid_argument if offset ofs is larger than the length of the array.

val blit : t -> int -> t -> int -> int -> unit

blit ra1 ofs1 ra2 ofs2 len blits resizable array ra1 onto ra2 reading len elements from offset ofs1 and writing them to ofs2, possibly adding elements at the end of ra2. Raises Invalid_argument if ofs1 and len do not designate a valid subarray of ra1 or if ofs2 is larger than the length of ra2.

Combining resizable arrays
val append : t -> t -> t

append ra1 ra2

  • returns

    a new resizable array using the default strategy and copying ra1 and ra2 in this order onto it.

val concat : t list -> t

concat l

  • returns

    a new resizable array using the default strategy and copying all resizable arrays in l in their respective order onto it.

Adding and removing elements
val add_one : t -> el -> unit

add_one ra el adds element el to resizable array ra, possibly causing a reallocation.

val remove_one : t -> unit

remove_one ra removes the last element of resizable array ra, possibly causing a reallocation.

  • raises Failure

    if the array is empty.

val remove_n : t -> int -> unit

remove_n ra n removes the last n elements of resizable array ra, possibly causing a reallocation.

  • raises Invalid_argument

    if there are not enough elements or n < 0.

val remove_range : t -> int -> int -> unit

remove_range ra ofs len removes len elements from resizable array ra starting at ofs and possibly causing a reallocation.

  • raises Invalid_argument

    if range is invalid.

val clear : t -> unit

clear ra removes all elements from resizable array ra, possibly causing a reallocation.

Swapping
val swap : t -> int -> int -> unit

swap ra n m swaps elements at indices n and m.

  • raises Invalid_argument

    if any index is out of range.

val swap_in_last : t -> int -> unit

swap_in_last ra n swaps the last element with the one at position n.

  • raises Invalid_argument

    if index n is out of range.

Array conversions
val to_array : t -> el array

to_array ra converts a resizable array to a standard one.

val sof_array : strategy -> el array -> t

sof_array s ar converts a standard array to a resizable one, using strategy s.

val of_array : el array -> t

of_array ar converts a standard array to a resizable one using the default strategy.

List conversions
val to_list : t -> el list

to_list ra converts resizable array ra to a list.

val sof_list : strategy -> el list -> t

sof_list s l creates a resizable array using strategy s and the elements in list l.

val of_list : el list -> t

of_list l creates a resizable array using the default strategy and the elements in list l.

Iterators
val iter : (el -> unit) -> t -> unit

iter f ra applies the unit-function f to each element in resizable array ra.

val map : (el -> el) -> t -> t

map f ra

  • returns

    a resizable array using the strategy of ra and mapping each element in ra to its corresponding position in the new array using function f.

val iteri : (int -> el -> unit) -> t -> unit

iteri f ra applies the unit-function f to each index and element in resizable array ra.

val mapi : (int -> el -> el) -> t -> t

mapi f ra

  • returns

    a resizable array using the strategy of ra and mapping each element in ra to its corresponding position in the new array using function f and the index position.

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

fold_left f a ra left-folds values in resizable array ra using function f and start accumulator a.

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

fold_right f a ra right-folds values in resizable array ra using function f and start accumulator a.

Scanning of resizable arrays
val for_all : (el -> bool) -> t -> bool

for_all p ra

  • returns

    true if all elements in resizable array ra satisfy the predicate p, false otherwise.

val exists : (el -> bool) -> t -> bool

exists p ra

  • returns

    true if at least one element in resizable array ra satisfies the predicate p, false otherwise.

val mem : el -> t -> bool

mem el ra

  • returns

    true if element el is logically equal to any element in resizable array ra, false otherwise.

val memq : el -> t -> bool

memq el ra

  • returns

    true if element el is physically equal to any element in resizable array ra, false otherwise.

val pos : el -> t -> int option

pos el ra

  • returns

    Some index if el is logically equal to the element at index in ra, None otherwise. index is the index of the first element that matches.

val posq : el -> t -> int option

posq el ra

  • returns

    Some index if el is physically equal to the element at index in ra, None otherwise. index is the index of the first element that matches.

Searching of resizable arrays
val find : (el -> bool) -> t -> el

find p ra

  • returns

    the first element in resizable array ra that satisfies predicate p.

  • raises Not_found

    if there is no such element.

val find_index : (el -> bool) -> t -> int -> int

find_index p ra pos

  • returns

    the index of the first element that satisfies predicate p in resizable array ra, starting search at index pos.

  • raises Not_found

    if there is no such element or if pos is larger than the highest index.

  • raises Invalid_argument

    if pos is negative.

val filter : (el -> bool) -> t -> t

filter p ra

  • returns

    a new resizable array by filtering out all elements in ra that satisfy predicate p using the same strategy as ra.

val find_all : (el -> bool) -> t -> t

find_all p ra is the same as filter

val filter_in_place : (el -> bool) -> t -> unit

filter_in_place p ra as filter, but filters in place.

val partition : (el -> bool) -> t -> t * t

partition p ra

  • returns

    a pair of resizable arrays, the left part containing only elements of ra that satisfy predicate p, the right one only those that do not satisfy it. Both returned arrays are created using the strategy of ra.

UNSAFE STUFF - USE WITH CAUTION!
val unsafe_get : t -> int -> el
val unsafe_set : t -> int -> el -> unit
val unsafe_sub : t -> int -> int -> t
val unsafe_fill : t -> int -> int -> el -> unit
val unsafe_blit : t -> int -> t -> int -> int -> unit
val unsafe_remove_one : t -> unit
val unsafe_remove_n : t -> int -> unit
val unsafe_swap : t -> int -> int -> unit
val unsafe_swap_in_last : t -> int -> unit
String conversions
val sof_string : strategy -> string -> t

sof_string s ar converts a string to a resizable buffer using strategy s.

val of_string : string -> t

of_string ar converts a string to a resizable buffer using the default strategy.

Functions found in the standard Buffer-module

Note that the function create n ignores the parameter n and uses the default strategy instead. You can supply a different strategy with creates s n as described above.

val contents : t -> string

contents b

  • returns

    a copy of the current contents of the buffer b.

val reset : t -> unit

reset b just clears the buffer, possibly resizing it.

val add_char : t -> char -> unit

add_char b c appends the character c at the end of the buffer b.

val add_string : t -> string -> unit

add_string b s appends the string s at the end of the buffer b.

val add_substring : t -> string -> int -> int -> unit

add_substring b s ofs len takes len characters from offset ofs in string s and appends them at the end of the buffer b.

val add_buffer : t -> t -> unit

add_buffer b1 b2 appends the current contents of buffer b2 at the end of buffer b1. b2 is not modified.

val add_channel : t -> Stdlib.in_channel -> int -> unit

add_channel b ic n reads exactly n character from the input channel ic and stores them at the end of buffer b.

  • raises End_of_file

    if the channel contains fewer than n characters.

val output_buffer : Stdlib.out_channel -> t -> unit

output_buffer oc b writes the current contents of buffer b on the output channel oc.

Additional buffer functions
val add_full_channel : t -> Stdlib.in_channel -> unit
val add_full_channel_f : t -> Stdlib.in_channel -> int -> (int -> int) -> unit
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