Int32 − 32-bit integers.
: sig end
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.
32−bit integers are suffixed by l:
let zero: int32 = 0l
let one: int32 = 1l
let m_one: int32 = −1l
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
val add : int32 -> int32 -> int32
val sub : int32 -> int32 -> int32
val mul : int32 -> int32 -> int32
val div : int32 -> int32 -> int32
Integer division. This division rounds the real quotient of its arguments towards zero, as specified for (/) .
Raises Division_by_zero if the second argument is zero.
val unsigned_div : int32 -> int32 -> int32
Same as Int32.div , except that arguments and result are interpreted as unsigned 32−bit integers.
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 unsigned_rem : int32 -> int32 -> int32
Same as Int32.rem , except that arguments and result are interpreted as unsigned 32−bit integers.
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 ). On 64−bit platforms, the argument is taken modulo 2^32.
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 unsigned_to_int : int32 -> int option
Same as Int32.to_int , but interprets the argument as an unsigned integer. Returns None if the unsigned value of the argument cannot fit into an int .
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 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*Int32.max_int+1] . If the input exceeds Int32.max_int it is converted to the signed integer Int32.min_int + input − Int32.max_int − 1 .
The _ (underscore) character can appear anywhere in the string and is ignored.
Raises Failure 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.
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 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 unsigned_compare : t -> t -> int
Same as Int32.compare , except that arguments are interpreted as unsigned 32−bit integers.
val equal : t -> t -> bool
The equal function for int32s.