Skip to main content

Module std::u64

use std::ascii;
use std::option;
use std::string;
use std::vector;

Function bitwise_not​

Returns the bitwise not of the value. Each bit that is 1 becomes 0. Each bit that is 0 becomes 1.

public fun bitwise_not(x: u64): u64
Click to open
Implementation
public fun bitwise_not(x: u64): u64 {
    x ^ max_value!()
}

Function max​

Return the larger of x and y

public fun max(x: u64, y: u64): u64
Click to open
Implementation
public fun max(x: u64, y: u64): u64 {
    std::macros::num_max!(x, y)
}

Function min​

Return the smaller of x and y

public fun min(x: u64, y: u64): u64
Click to open
Implementation
public fun min(x: u64, y: u64): u64 {
    std::macros::num_min!(x, y)
}

Function diff​

Return the absolute value of x - y

public fun diff(x: u64, y: u64): u64
Click to open
Implementation
public fun diff(x: u64, y: u64): u64 {
    std::macros::num_diff!(x, y)
}

Function divide_and_round_up​

Calculate x / y, but round up the result.

public fun divide_and_round_up(x: u64, y: u64): u64
Click to open
Implementation

Function pow​

Return the value of a base raised to a power

public fun pow(base: u64, exponent: u8): u64
Click to open
Implementation
public fun pow(base: u64, exponent: u8): u64 {
    std::macros::num_pow!(base, exponent)
}

Function sqrt​

Get a nearest lower integer Square Root for x. Given that this function can only operate with integers, it is impossible to get perfect (or precise) integer square root for some numbers.

Example:

math::sqrt(9) => 3
math::sqrt(8) => 2 // the nearest lower square root is 4;

In integer math, one of the possible ways to get results with more precision is to use higher values or temporarily multiply the value by some bigger number. Ideally if this is a square of 10 or 100.

Example:

math::sqrt(8) => 2;
math::sqrt(8 * 10000) => 282;
// now we can use this value as if it was 2.82;
// but to get the actual result, this value needs
// to be divided by 100 (because sqrt(10000)).


math::sqrt(8 * 1000000) => 2828; // same as above, 2828 / 1000 (2.828)
public fun sqrt(x: u64): u64
Click to open
Implementation
public fun sqrt(x: u64): u64 {
    std::macros::num_sqrt!<u64, u128>(x, 64)
}

Function try_as_u8​

Try to convert a 

u64
to a 
u8
. Returns None if the value is too large.

public fun try_as_u8(x: u64): std::option::Option<u8>
Click to open
Implementation
public fun try_as_u8(x: u64): Option<u8> {
    std::macros::try_as_u8!(x)
}

Function try_as_u16​

Try to convert a 

u64
to a 
u16
. Returns None if the value is too large.

public fun try_as_u16(x: u64): std::option::Option<u16>
Click to open
Implementation
public fun try_as_u16(x: u64): Option<u16> {
    std::macros::try_as_u16!(x)
}

Function try_as_u32​

Try to convert a 

u64
to a 
u32
. Returns None if the value is too large.

public fun try_as_u32(x: u64): std::option::Option<u32>
Click to open
Implementation
public fun try_as_u32(x: u64): Option<u32> {
    std::macros::try_as_u32!(x)
}

Function to_string​

public fun to_string(x: u64): std::string::String
Click to open
Implementation
public fun to_string(x: u64): String {
    std::macros::num_to_string!(x)
}

Macro function max_value​

Maximum value for a 

u64

public macro fun max_value(): u64
Click to open
Implementation
public macro fun max_value(): u64 {
    0xFFFF_FFFF_FFFF_FFFF
}

Macro function range_do​

Loops applying 

f</code>toeachnumberfrom<code>f</code> to each number from <code>start
to $stop (exclusive)

public macro fun range_do<$R: drop>($start: u64, $stop: u64, $f: |u64| -> $R)
Click to open
Implementation
public macro fun range_do<$R: drop>($start: u64, $stop: u64, $f: |u64| -> $R) {
    std::macros::range_do!($start, $stop, $f)
}

Macro function range_do_eq​

Loops applying 

f</code>toeachnumberfrom<code>f</code> to each number from <code>start
to $stop (inclusive)

public macro fun range_do_eq<$R: drop>($start: u64, $stop: u64, $f: |u64| -> $R)
Click to open
Implementation
public macro fun range_do_eq<$R: drop>($start: u64, $stop: u64, $f: |u64| -> $R) {
    std::macros::range_do_eq!($start, $stop, $f)
}

Macro function do​

Loops applying 

f</code>toeachnumberfrom<code>0</code>to<code>f</code> to each number from <code>0</code> to <code>stop
(exclusive)

public macro fun do<$R: drop>($stop: u64, $f: |u64| -> $R)
Click to open
Implementation
public macro fun do<$R: drop>($stop: u64, $f: |u64| -> $R) {
    std::macros::do!($stop, $f)
}

Macro function do_eq​

Loops applying 

f</code>toeachnumberfrom<code>0</code>to<code>f</code> to each number from <code>0</code> to <code>stop
(inclusive)

public macro fun do_eq<$R: drop>($stop: u64, $f: |u64| -> $R)
Click to open
Implementation
public macro fun do_eq<$R: drop>($stop: u64, $f: |u64| -> $R) {
    std::macros::do_eq!($stop, $f)
}