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 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.
val neg : int32 -> int32
Unary negation.
val add : int32 -> int32 -> int32
Addition.
val sub : int32 -> int32 -> int32
Subtraction.
val mul : int32 -> int32 -> int32
Multiplication.
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, 231 - 1.
val min_int : int32
The smallest representable 32-bit integer, -231.
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 231, 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.