DoxigAlpha
std › math › big › int › Mutable › clone

clone

Clones an Mutable and returns a new Mutable with the same value. The new Mutable is a deep copy and can be modified separately from the original. Asserts that limbs is big enough to store the value.

Function parameters

Parameters

#
limbs:[]Limb

Used to indicate either limit of a 2s-complement integer.

Types

#
TwosCompIntLimit
Used to indicate either limit of a 2s-complement integer.
Mutable
A arbitrary-precision big integer, with a fixed set of mutable limbs.
Const
A arbitrary-precision big integer, with a fixed set of immutable limbs.
Managed
An arbitrary-precision big integer along with an allocator which manages the memory.

Returns the number of limbs needed to store `scalar`, which must be a

Functions

#
calcLimbLen
Returns the number of limbs needed to store `scalar`, which must be a
calcSetStringLimbCount
Assumes `string_len` doesn't account for minus signs if the number is negative.
calcNonZeroTwosCompLimbCount
Compute the number of limbs required to store a 2s-complement number of `bit_count` bits.
calcTwosCompLimbCount
Compute the number of limbs required to store a 2s-complement number of `bit_count` bits.
addMulLimbWithCarry
a + b * c + *carry, sets carry to the overflow bits
llcmp
Returns -1, 0, 1 if |a| < |b|, |a| == |b| or |a| > |b| respectively for limbs.

Source

Implementation

#
pub fn clone(other: Mutable, limbs: []Limb) Mutable {
    @memcpy(limbs[0..other.len], other.limbs[0..other.len]);
    return .{
        .limbs = limbs,
        .len = other.len,
        .positive = other.positive,
    };
}