Module kernel 

Core planner and data structures.

This module contains the fundamental types and traits that power OxiFFT:

• Float trait for generic floating-point operations
• Complex<T> for complex numbers
• Tensor and IoDim for N-dimensional data representation
• Problem, Plan, and Solver trait hierarchies
• The Planner that orchestrates algorithm selection

Structs

Complex

A complex number with real and imaginary parts.

IoDim

Dimension specification with separate input and output strides.

OpCount

Operation count for cost estimation.

Planner

Main planner for FFT transforms.

PlannerFlags

Planning flags that control algorithm selection.

ProblemHash

Hash a problem for wisdom lookup.

Tensor

N-dimensional tensor representation.

TrigTable

Precomputed trigonometric table.

TwiddleCache

Cache for twiddle factors.

WisdomEntry

Wisdom entry for plan caching.

Enums

ProblemKind

Problem kind identifier.

SolverChoice

Solver selection strategy.

WakeMode

Wake mode for plan initialization.

WakeState

Wake state of a plan.

Traits

Float

Trait for floating-point types supported by OxiFFT.

Plan

Base trait for all FFT plans.

Problem

Base trait for all FFT problems.

Solver

Solver creates plans for specific problem types.

Functions

factor

Factor a number into primes.

is_prime

Check if a number is prime.

mod_pow

Modular exponentiation: base^exp mod modulus.

primitive_root

Compute the smallest primitive root modulo p (p must be prime).