Module `CCInt32`

Int32

Helpers for 32-bit integers.

This module provides operations on the type int32 of signed 32-bit integers. Unlike the built-in int type, the type int32 is guaranteed to be exactly 32-bit wide on all platforms. All arithmetic operations over int32 are taken modulo 2³².

Performance notice: values of type int32 occupy more memory space than values of type int, and arithmetic operations on int32 are generally slower than those on int. Use int32 only when the application requires exact 32-bit arithmetic.

since: 2.1

include module type of sig ... end

val zero : int32
val one : int32
val minus_one : int32

val neg : int32 -> int32
val add : int32 -> int32 -> int32
val sub : int32 -> int32 -> int32
val mul : int32 -> int32 -> int32
val div : int32 -> int32 -> int32
val rem : int32 -> int32 -> int32

val succ : int32 -> int32
val pred : int32 -> int32
val abs : int32 -> int32
val max_int : int32
val min_int : int32

val logand : int32 -> int32 -> int32
val logor : int32 -> int32 -> int32
val logxor : int32 -> int32 -> int32

val lognot : int32 -> int32

val shift_left : int32 -> int -> int32
val shift_right : int32 -> int -> int32
val shift_right_logical : int32 -> int -> int32
val of_int : int -> int32
val to_int : int32 -> int
val of_float : float -> int32
val to_float : int32 -> float
val of_string : string -> int32

val of_string_opt : string -> int32 option
val to_string : int32 -> string

val bits_of_float : float -> int32
val float_of_bits : int32 -> float

type t = int32

val compare : t -> t -> int
val equal : t -> t -> bool

val format : string -> int32 -> string

val (+) : t -> t -> t: Addition.

val (-) : t -> t -> t: Subtraction.

val (~-) : t -> t: Unary negation.

val (*) : t -> t -> t: Multiplication.

val (/) : t -> t -> t: Integer division. Raise Division_by_zero if the second argument is zero. This division rounds the real quotient of its arguments towards zero, as specified for Pervasives.(/).

val (mod) : t -> t -> t: x mod y is the integer remainder. If y <> zero, the result of x mod y satisfies the following property: x = ((x / y) * y) + (x mod y). If y = 0, x mod y raises Division_by_zero.

val (land) : t -> t -> t: Bitwise logical and.

val (lor) : t -> t -> t: Bitwise logical or.

val (lxor) : t -> t -> t: Bitwise logical exclusive or.

val (lnot) : t -> t: Bitwise logical negation.

val (lsl) : t -> int -> t: x lsl y shifts x to the left by y bits, filling in with zeroes. The result is unspecified if y < 0 or y >= 32.

val (lsr) : t -> int -> t: x lsr y shifts x to the right by y bits. This is a logical shift: zeroes are inserted in the vacated bits regardless of the sign of x. The result is unspecified if y < 0 or y >= 32.

val (asr) : t -> int -> t: x asr y shifts x to the right by y bits. This is an arithmetic shift: the sign bit of x is replicated and inserted in the vacated bits. The result is unspecified if y < 0 or y >= 32.

module Infix : sig ... end

include module type of Infix

val (+) : t -> t -> t
val (-) : t -> t -> t
val (~-) : t -> t
val (*) : t -> t -> t
val (/) : t -> t -> t
val (mod) : t -> t -> t
val (land) : t -> t -> t
val (lor) : t -> t -> t
val (lxor) : t -> t -> t
val (lnot) : t -> t
val (lsl) : t -> int -> t
val (lsr) : t -> int -> t
val (asr) : t -> int -> t
val (=) : t -> t -> bool
val (<>) : t -> t -> bool
val (>) : t -> t -> bool
val (>=) : t -> t -> bool
val (<=) : t -> t -> bool
val (<) : t -> t -> bool

val equal : t -> t -> bool: The equal function for 32-bit integers. Like Pervasives.(=) x y).

val hash : t -> int: Like Pervasives.abs (to_int x).

Conversion

val to_int : t -> int: Convert the given 32-bit integer (type int32) to an integer (type int). On 32-bit platforms, the 32-bit integer is taken modulo 2³¹, i.e. the high-order bit is lost during the conversion. On 64-bit platforms, the conversion is exact.

val of_int : int -> t: Alias to Int32.of_int.

val to_float : t -> float: Convert the given 32-bit integer to a floating-point number.

val of_float : float -> t: Alias to Int32.of_float. Convert the given floating-point number to a 32-bit integer, discarding the fractional part (truncate towards 0). The result of the conversion is undefined if, after truncation, the number is outside the range [CCInt32.min_int, CCInt32.max_int].

val to_string : t -> string: Return the string representation of its argument, in signed decimal.

val of_string_exn : string -> t

Alias to Int32.of_string. Convert the given string to a 32-bit integer. The string is read in decimal (by default, or if the string begins with 0u) or in hexadecimal, octal or binary if the string begins with 0x, 0o or 0b respectively.

The 0u prefix reads the input as an unsigned integer in the range [0, 2*CCInt32.max_int+1]. If the input exceeds CCInt32.max_int it is converted to the signed integer CCInt32.min_int + input - CCInt32.max_int - 1.

The _ (underscore) character can appear anywhere in the string and is ignored. Raise Failure "Int32.of_string" if the given string is not a valid representation of an integer, or if the integer represented exceeds the range of integers representable in type int32.

val of_string : string -> t option: Safe version of of_string_exn. Like of_string_exn, but return None instead of raising.

val of_string_opt : string -> t option: Alias to of_string.