Int32.3o man page

Int32 — 32-bit integers.


Module Int32


Module Int32
: sig end

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 2^{32.

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.

val zero : int32

The 32-bit integer 0.

val one : int32

The 32-bit integer 1.

val minus_one : int32

The 32-bit integer -1.

val neg : int32 -> int32

Unary negation.

val add : int32 -> int32 -> int32


val sub : int32 -> int32 -> int32


val mul : int32 -> int32 -> int32


val div : int32 -> int32 -> int32

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 rem : int32 -> int32 -> int32

Integer remainder. If y is not zero, the result of Int32.rem x y satisfies the following property: x = Int32.add (Int32.mul (Int32.div x y) y) (Int32.rem x y) . If y = 0 , Int32.rem x y raises Division_by_zero .

val succ : int32 -> int32

Successor. Int32.succ x is Int32.add x Int32.one .

val pred : int32 -> int32

Predecessor. Int32.pred x is Int32.sub x Int32.one .

val abs : int32 -> int32

Return the absolute value of its argument.

val max_int : int32

The greatest representable 32-bit integer, 2^{31 - 1.

val min_int : int32

The smallest representable 32-bit integer, -2^{31.

val logand : int32 -> int32 -> int32

Bitwise logical and.

val logor : int32 -> int32 -> int32

Bitwise logical or.

val logxor : int32 -> int32 -> int32

Bitwise logical exclusive or.

val lognot : int32 -> int32

Bitwise logical negation

val shift_left : int32 -> int -> int32

Int32.shift_left x y shifts x to the left by y bits. The result is unspecified if y < 0 or y >= 32 .

val shift_right : int32 -> int -> int32

Int32.shift_right x 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 .

val shift_right_logical : int32 -> int -> int32

Int32.shift_right_logical x 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 of_int : int -> int32

Convert the given integer (type int ) to a 32-bit integer (type int32 ).

val to_int : int32 -> 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 2^{31, i.e. the high-order bit is lost during the conversion. On 64-bit platforms, the conversion is exact.

val of_float : float -> int32

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 [ Int32.min_int , Int32.max_int ].

val to_float : int32 -> float

Convert the given 32-bit integer to a floating-point number.

val of_string : string -> int32

Convert the given string to a 32-bit integer. The string is read in decimal (by default) or in hexadecimal, octal or binary if the string begins with 0x , 0o or 0b respectively. Raise Failure int_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 to_string : int32 -> string

Return the string representation of its argument, in signed decimal.

val bits_of_float : float -> int32

Return the internal representation of the given float according to the IEEE 754 floating-point 'single format' bit layout. Bit 31 of the result represents the sign of the float; bits 30 to 23 represent the (biased) exponent; bits 22 to 0 represent the mantissa.

val float_of_bits : int32 -> float

Return the floating-point number whose internal representation, according to the IEEE 754 floating-point 'single format' bit layout, is the given int32 .

type t = int32

An alias for the type of 32-bit integers.

val compare : t -> t -> int

The comparison function for 32-bit integers, with the same specification as Pervasives.compare . Along with the type t , this function compare allows the module Int32 to be passed as argument to the functors Set.Make and Map.Make .

=== Deprecated functions ===

val format : string -> int32 -> string

Do not use this deprecated function. Instead, used Printf.sprintf with a %l... format.


OCamldoc OCaml library 2016-05-04