rssn 0.2.9

A comprehensive scientific computing library for Rust, aiming for feature parity with NumPy and SymPy.
Documentation 
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//! JSON-based FFI API for symbolic simplify_dag functions.

use std::os::raw::c_char;

use crate::ffi_apis::common::from_json_string;
use crate::ffi_apis::common::to_json_string;
use crate::symbolic::core::Expr;
use crate::symbolic::simplify_dag;

/// Simplifies an expression using the DAG-based simplifier (JSON input/output).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_json_simplify_dag(expr_json: *const c_char) -> *mut c_char {
    let expr: Option<Expr> = from_json_string(expr_json);

    if let Some(e) = expr {
        let result = simplify_dag::simplify(&e);

        to_json_string(&result)
    } else {
        std::ptr::null_mut()
    }
}