Function graphlite_create_session

graphlite-ffi/src/lib.rs:141–195

(
    db: *mut GraphLiteDB,
    username: *const c_char,
    error_out: *mut GraphLiteErrorCode,
)

/// * Returned string must be freed with `graphlite_free_string`
#[no_mangle]
pub unsafe extern "C" fn graphlite_create_session(
    db: *mut GraphLiteDB,
    username: *const c_char,
    error_out: *mut GraphLiteErrorCode,
) -> *mut c_char {
    let result = panic::catch_unwind(AssertUnwindSafe(|| {
        // Check for null pointers
        if db.is_null() {
            set_error(error_out, GraphLiteErrorCode::NullPointer);
            return ptr::null_mut();
        }
        if username.is_null() {
            set_error(error_out, GraphLiteErrorCode::NullPointer);
            return ptr::null_mut();
        }

        let db_ref = unsafe { &*db };

        // Convert C string to Rust string
        let c_str = unsafe { CStr::from_ptr(username) };
        let username_str = match c_str.to_str() {
            Ok(s) => s,
            Err(_) => {
                set_error(error_out, GraphLiteErrorCode::InvalidUtf8);
                return ptr::null_mut();
            }
        };

        // Create session
        match db_ref.coordinator.create_simple_session(username_str) {
            Ok(session_id) => match CString::new(session_id) {
                Ok(c_string) => {
                    set_error(error_out, GraphLiteErrorCode::Success);
                    c_string.into_raw()
                }
                Err(_) => {
                    set_error(error_out, GraphLiteErrorCode::InvalidUtf8);
                    ptr::null_mut()
                }
            },
            Err(_) => {
                set_error(error_out, GraphLiteErrorCode::SessionError);
                ptr::null_mut()
            }
        }
    }));

    match result {
        Ok(ptr) => ptr,
        Err(_) => {
            set_error(error_out, GraphLiteErrorCode::PanicError);
            ptr::null_mut()
        }
    }
}

/// Execute a GQL query and return results as JSON
///