copy
Copies the value of a Const to an existing Mutable so that they both have the same value. Asserts the value fits in the limbs buffer.
Function parameters
Parameters
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 copy(self: *Mutable, other: Const) void {
if (self.limbs.ptr != other.limbs.ptr) {
@memcpy(self.limbs[0..other.limbs.len], other.limbs[0..other.limbs.len]);
}
// Normalize before setting `positive` so the `eqlZero` doesn't need to iterate
// over the extra zero limbs.
self.normalize(other.limbs.len);
self.positive = other.positive or other.eqlZero();
}