rssn 0.2.9

A comprehensive scientific computing library for Rust, aiming for feature parity with NumPy and SymPy.
Documentation 
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//! Handle-based FFI API for physics SM (Spectral Methods) functions.

use crate::numerical::matrix::Matrix;
use crate::physics::physics_sm;

/// Simulates the 1D advection-diffusion scenario and returns the results as a Matrix handle (1xN).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_physics_sm_simulate_1d_advection() -> *mut Matrix<f64> {
    let results = physics_sm::simulate_1d_advection_diffusion_scenario();

    let n = results.len();

    Box::into_raw(Box::new(Matrix::new(1, n, results)))
}

/// Simulates the 2D advection-diffusion scenario and returns the results as a Matrix handle (`WxH`).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_physics_sm_simulate_2d_advection() -> *mut Matrix<f64> {
    let results = physics_sm::simulate_2d_advection_diffusion_scenario();

    // Assuming NxN for simplicity in the scenario, let's just make it a square matrix if it fits,
    // otherwise a single row. The scenario uses 64x64.
    let n = results.len();

    let dim: usize = ((n as f64).sqrt() as i64).try_into().unwrap_or(0);

    if dim * dim == n {
        Box::into_raw(Box::new(Matrix::new(dim, dim, results)))
    } else {
        Box::into_raw(Box::new(Matrix::new(1, n, results)))
    }
}