Module Stdlib.Int32

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.

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.

external neg : int32 -> int32 = "%int32_neg"

Unary negation.

external add : int32 -> int32 -> int32 = "%int32_add"

Addition.

external sub : int32 -> int32 -> int32 = "%int32_sub"

Subtraction.

external mul : int32 -> int32 -> int32 = "%int32_mul"

Multiplication.

external div : int32 -> int32 -> int32 = "%int32_div"

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.(/).

external rem : int32 -> int32 -> int32 = "%int32_mod"

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, 231 - 1.

val min_int : int32

The smallest representable 32-bit integer, -231.

external logand : int32 -> int32 -> int32 = "%int32_and"

Bitwise logical and.

external logor : int32 -> int32 -> int32 = "%int32_or"

Bitwise logical or.

external logxor : int32 -> int32 -> int32 = "%int32_xor"

Bitwise logical exclusive or.

val lognot : int32 -> int32

Bitwise logical negation

external shift_left : int32 -> int -> int32 = "%int32_lsl"

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

external shift_right : int32 -> int -> int32 = "%int32_asr"

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.

external shift_right_logical : int32 -> int -> int32 = "%int32_lsr"

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.

external of_int : int -> int32 = "%int32_of_int"

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

external to_int : int32 -> int = "%int32_to_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.

external of_float : float -> int32 = "caml_int32_of_float" "caml_int32_of_float_unboxed"

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].

external to_float : int32 -> float = "caml_int32_to_float" "caml_int32_to_float_unboxed"

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

external of_string : string -> int32 = "caml_int32_of_string"

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 of_string_opt : string -> int32 option

Same as of_string, but return None instead of raising.

val to_string : int32 -> string

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

external bits_of_float : float -> int32 = "caml_int32_bits_of_float" "caml_int32_bits_of_float_unboxed"

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.

external float_of_bits : int32 -> float = "caml_int32_float_of_bits" "caml_int32_float_of_bits_unboxed"

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.

val equal : t -> t -> bool

The equal function for int32s.

external format : string -> int32 -> string = "caml_int32_format"

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