rssn 0.2.9

A comprehensive scientific computing library for Rust, aiming for feature parity with NumPy and SymPy.
Documentation 
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use crate::symbolic::core::Expr;
use crate::symbolic::logic::is_satisfiable;
use crate::symbolic::logic::simplify_logic;
use crate::symbolic::logic::to_cnf;
use crate::symbolic::logic::to_dnf;

/// Simplifies a logical expression using handle-based FFI.
///
/// # Safety
/// The caller must ensure that `expr` is a valid pointer to an `Expr`.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_simplify_logic_handle(expr: *const Expr) -> *mut Expr {
    let expr_ref = unsafe {
        if expr.is_null() {
            return std::ptr::null_mut();
        }

        &*expr
    };

    let result = simplify_logic(expr_ref);

    Box::into_raw(Box::new(result))
}

/// Converts a logical expression to Conjunctive Normal Form (CNF) using handle-based FFI.
///
/// # Safety
/// The caller must ensure that `expr` is a valid pointer to an `Expr`.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_to_cnf_handle(expr: *const Expr) -> *mut Expr {
    let expr_ref = unsafe {
        if expr.is_null() {
            return std::ptr::null_mut();
        }

        &*expr
    };

    let result = to_cnf(expr_ref);

    Box::into_raw(Box::new(result))
}

/// Converts a logical expression to Disjunctive Normal Form (DNF) using handle-based FFI.
///
/// # Safety
/// The caller must ensure that `expr` is a valid pointer to an `Expr`.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_to_dnf_handle(expr: *const Expr) -> *mut Expr {
    let expr_ref = unsafe {
        if expr.is_null() {
            return std::ptr::null_mut();
        }

        &*expr
    };

    let result = to_dnf(expr_ref);

    Box::into_raw(Box::new(result))
}

/// Checks if a logical expression is satisfiable using handle-based FFI.
///
/// Returns:
/// - 1 if satisfiable
/// - 0 if unsatisfiable
/// - -1 if the expression contains quantifiers (undecidable)
///
/// # Safety
/// The caller must ensure that `expr` is a valid pointer to an `Expr`.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_is_satisfiable_handle(expr: *const Expr) -> i32 {
    let expr_ref = unsafe {
        if expr.is_null() {
            return -1;
        }

        &*expr
    };

    match is_satisfiable(expr_ref) {
        | Some(true) => 1,
        | Some(false) => 0,
        | None => -1,
    }
}