nautilus_model/ffi/identifiers/
client_id.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2025 Nautech Systems Pty Ltd. All rights reserved.
3//  https://nautechsystems.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16use std::ffi::c_char;
17
18use nautilus_core::ffi::string::cstr_as_str;
19
20use crate::identifiers::ClientId;
21
22/// Returns a Nautilus identifier from C string pointer.
23///
24/// # Safety
25///
26/// - Assumes `ptr` is a valid C string pointer.
27#[no_mangle]
28pub unsafe extern "C" fn client_id_new(ptr: *const c_char) -> ClientId {
29    ClientId::from(cstr_as_str(ptr))
30}
31
32#[no_mangle]
33pub extern "C" fn client_id_hash(id: &ClientId) -> u64 {
34    id.inner().precomputed_hash()
35}
36
37////////////////////////////////////////////////////////////////////////////////
38// Tests
39////////////////////////////////////////////////////////////////////////////////
40#[cfg(test)]
41mod tests {
42    use std::ffi::CStr;
43
44    use rstest::rstest;
45
46    use super::*;
47    use crate::identifiers::stubs::*;
48
49    #[rstest]
50    fn test_client_id_to_cstr_c() {
51        let id = ClientId::from("BINANCE");
52        let c_string = id.inner().as_char_ptr();
53        let rust_string = unsafe { CStr::from_ptr(c_string) }.to_str().unwrap();
54        assert_eq!(rust_string, "BINANCE");
55    }
56
57    #[rstest]
58    fn test_client_id_hash_c() {
59        let id1 = client_id_binance();
60        let id2 = client_id_binance();
61        let id3 = client_id_dydx();
62        assert_eq!(client_id_hash(&id1), client_id_hash(&id2));
63        assert_ne!(client_id_hash(&id1), client_id_hash(&id3));
64    }
65}
nautilus_model/ffi/identifiers/client_id.rs

nautilus_model/ffi/identifiers/
client_id.rs
