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doc/containers/CCNativeint/index.html
Module CCNativeintSource
Nativeint
Helpers for processor-native integers
This module provides operations on the type nativeint of signed 32-bit integers (on 32-bit platforms) or signed 64-bit integers (on 64-bit platforms). This integer type has exactly the same width as that of a pointer type in the C compiler. All arithmetic operations over nativeint are taken modulo 232 or 264 depending on the word size of the architecture.
Performance notice: values of type nativeint occupy more memory space than values of type int, and arithmetic operations on nativeint are generally slower than those on int. Use nativeint only when the application requires the extra bit of precision over the int type.
include module type of struct include Nativeint end
The native integer 0.
The native integer 1.
The native integer -1.
Unary negation.
Addition.
Subtraction.
Multiplication.
Integer division. This division rounds the real quotient of its arguments towards zero, as specified for Stdlib.(/).
Same as div, except that arguments and result are interpreted as unsigned native integers.
Integer remainder. If y is not zero, the result of Nativeint.rem x y satisfies the following properties: Nativeint.zero <= Nativeint.rem x y < Nativeint.abs y and x = Nativeint.add (Nativeint.mul (Nativeint.div x y) y) (Nativeint.rem x y). If y = 0, Nativeint.rem x y raises Division_by_zero.
Same as rem, except that arguments and result are interpreted as unsigned native integers.
Successor. Nativeint.succ x is Nativeint.add x Nativeint.one.
Predecessor. Nativeint.pred x is Nativeint.sub x Nativeint.one.
Return the absolute value of its argument.
The size in bits of a native integer. This is equal to 32 on a 32-bit platform and to 64 on a 64-bit platform.
The greatest representable native integer, either 231 - 1 on a 32-bit platform, or 263 - 1 on a 64-bit platform.
The smallest representable native integer, either -231 on a 32-bit platform, or -263 on a 64-bit platform.
Bitwise logical and.
Bitwise logical or.
Bitwise logical exclusive or.
Bitwise logical negation.
Nativeint.shift_left x y shifts x to the left by y bits. The result is unspecified if y < 0 or y >= bitsize, where bitsize is 32 on a 32-bit platform and 64 on a 64-bit platform.
Nativeint.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 >= bitsize.
Nativeint.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 >= bitsize.
Same as to_int, but interprets the argument as an unsigned integer. Returns None if the unsigned value of the argument cannot fit into an int.
Convert the given 32-bit integer (type int32) to a native integer.
Convert the given native integer to a 32-bit integer (type int32). On 64-bit platforms, the 64-bit native integer is taken modulo 232, i.e. the top 32 bits are lost. On 32-bit platforms, the conversion is exact.
An alias for the type of native integers.
The comparison function for native integers, with the same specification as Stdlib.compare. Along with the type t, this function compare allows the module Nativeint to be passed as argument to the functors Set.Make and Map.Make.
Same as compare, except that arguments are interpreted as unsigned native integers.
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.(/).
x mod y is the integer remainder. If y <> zero, the result of x mod y satisfies the following properties: zero <= x mod y < abs y and x = ((x / y) * y) + (x mod y). If y = 0, x mod y raises Division_by_zero.
x lsl y shifts x to the left by y bits. The result is unspecified if y < 0 or y >= bitsize, where bitsize is 32 on a 32-bit platform and 64 on a 64-bit platform.
x lsr 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 >= bitsize.
x asr 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 >= bitsize.
Conversion
Convert the given native integer (type nativeint) to an integer (type int). The high-order bit is lost during the conversion.
Alias to Nativeint.of_int. Convert the given integer (type int) to a native integer (type nativeint).
Alias to Nativeint.of_float. Convert the given floating-point number to a native integer, discarding the fractional part (truncate towards 0). The result of the conversion is undefined if, after truncation, the number is outside the range [CCNativeint.min_int, CCNativeint.max_int].
Alias to Nativeint.of_string. Convert the given string to a native 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*CCNativeint.max_int+1]. If the input exceeds CCNativeint.max_int it is converted to the signed integer CCInt64.min_int + input - CCNativeint.max_int - 1.
Raise Failure "Nativeint.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 nativeint.
Safe version of of_string_exn. Like of_string_exn, but return None instead of raising.