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 neg : int32 -> int32
val add : int32 -> int32 -> int32
val sub : int32 -> int32 -> int32
val mul : int32 -> int32 -> int32
val div : int32 -> int32 -> int32
val unsigned_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 (/) : 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 forPervasives
.(/).
val (mod) : t -> t -> t
x mod y
is the integer remainder. Ify <> zero
, the result ofx mod y
satisfies the following property:x = ((x / y) * y) + (x mod y)
. Ify = 0
,x mod y
raisesDivision_by_zero
.
val (lsl) : t -> int -> t
x lsl y
shiftsx
to the left byy
bits, filling in with zeroes. The result is unspecified ify < 0
ory >= 32
.
val (lsr) : t -> int -> t
x lsr y
shiftsx
to the right byy
bits. This is a logical shift: zeroes are inserted in the vacated bits regardless of the sign ofx
. The result is unspecified ify < 0
ory >= 32
.
val (asr) : t -> int -> t
x asr y
shiftsx
to the right byy
bits. This is an arithmetic shift: the sign bit ofx
is replicated and inserted in the vacated bits. The result is unspecified ify < 0
ory >= 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 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 (typeint
). 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 with0u
) or in hexadecimal, octal or binary if the string begins with0x
,0o
or0b
respectively.The
0u
prefix reads the input as an unsigned integer in the range[0, 2*CCInt32.max_int+1]
. If the input exceedsCCInt32.max_int
it is converted to the signed integerCCInt32.min_int + input - CCInt32.max_int - 1
.The
_
(underscore) character can appear anywhere in the string and is ignored. RaiseFailure "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 typeint32
.
val of_string : string -> t option
Safe version of
of_string_exn
. Likeof_string_exn
, but returnNone
instead of raising.