package obus
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This module contain various functions used by both the library and the tools

val assoc : 'a -> ('a * 'b) list -> 'b option

Same as List.assoc but return an option

val assq : 'a -> ('a * 'b) list -> 'b option

Same as List.assq but return an option

val find_map : ('a -> 'b option) -> 'a list -> 'b option

find_map f l Apply f on each element of l until it return Some x and return that result or return None

val filter_map : ('a -> 'b option) -> 'a list -> 'b list

filter_map f l apply f on each element of l and return the list ef element for which f succeed (i.e. return Some x)

val part_map : ('a -> 'b option) -> 'a list -> 'b list * 'a list

part_map f l apply f on each element of l and return the list of success and the list of failure

type ('a, 'b) either =
  1. | InL of 'a
  2. | InR of 'b
val split : ('a -> ('b, 'c) either) -> 'a list -> 'b list * 'c list

Split a list

val map_option : 'a option -> ('a -> 'b) -> 'b option
val sha_1 : string -> string

Compute the sha1 of a string

val hex_encode : string -> string
val hex_decode : string -> string

A hex-encoded string is a string where each character is replaced by two hexadecimal characters which represent his ascii code

val homedir : string Lwt.t Lazy.t

The home directory

Random number generation

All the following functions try to generate random numbers using /dev/urandom and can fallback to pseudo-random generator

val fill_random : bytes -> int -> int -> unit

fill_random str ofs len Fill the given string from ofs to ofs+len-1 with random bytes.

val random_string : int -> string
val random_int : unit -> int
val random_int32 : unit -> int32
val random_int64 : unit -> int64