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 std::os::raw::c_char;

use crate::ffi_apis::common::from_json_string;
use crate::ffi_apis::common::to_json_string;
use crate::symbolic::quantum_mechanics::Bra;
use crate::symbolic::quantum_mechanics::Ket;
use crate::symbolic::quantum_mechanics::Operator;
use crate::symbolic::quantum_mechanics::{
    self,
};

/// Computes the expectation value using JSON.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_json_expectation_value(
    op_json: *const c_char,
    psi_json: *const c_char,
) -> *mut c_char {
    let op: Option<Operator> = from_json_string(op_json);

    let psi: Option<Ket> = from_json_string(psi_json);

    match (op, psi) {
        | (Some(op), Some(psi)) => to_json_string(&quantum_mechanics::expectation_value(&op, &psi)),
        | _ => std::ptr::null_mut(),
    }
}

/// Computes the uncertainty using JSON.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_json_uncertainty(
    op_json: *const c_char,
    psi_json: *const c_char,
) -> *mut c_char {
    let op: Option<Operator> = from_json_string(op_json);

    let psi: Option<Ket> = from_json_string(psi_json);

    match (op, psi) {
        | (Some(op), Some(psi)) => to_json_string(&quantum_mechanics::uncertainty(&op, &psi)),
        | _ => std::ptr::null_mut(),
    }
}

/// Computes the inner product <Bra|Ket> using JSON.
#[unsafe(no_mangle)]
pub extern "C" fn rssn_json_bra_ket(
    bra_json: *const c_char,
    ket_json: *const c_char,
) -> *mut c_char {
    let bra: Option<Bra> = from_json_string(bra_json);

    let ket: Option<Ket> = from_json_string(ket_json);

    match (bra, ket) {
        | (Some(bra), Some(ket)) => to_json_string(&quantum_mechanics::bra_ket(&bra, &ket)),
        | _ => std::ptr::null_mut(),
    }
}