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#[unsafe(no_mangle)]
28pub unsafe extern "C" fn client_id_new(ptr: *const c_char) -> ClientId {
29    let value = unsafe { cstr_as_str(ptr) };
30    ClientId::from(value)
31}
32
33#[unsafe(no_mangle)]
34pub extern "C" fn client_id_hash(id: &ClientId) -> u64 {
35    id.inner().precomputed_hash()
36}
37
38////////////////////////////////////////////////////////////////////////////////
39// Tests
40////////////////////////////////////////////////////////////////////////////////
41#[cfg(test)]
42mod tests {
43    use std::ffi::CStr;
44
45    use rstest::rstest;
46
47    use super::*;
48    use crate::identifiers::stubs::*;
49
50    #[rstest]
51    fn test_client_id_to_cstr_c() {
52        let id = ClientId::from("BINANCE");
53        let c_string = id.inner().as_char_ptr();
54        let rust_string = unsafe { CStr::from_ptr(c_string) }.to_str().unwrap();
55        assert_eq!(rust_string, "BINANCE");
56    }
57
58    #[rstest]
59    fn test_client_id_hash_c() {
60        let id1 = client_id_binance();
61        let id2 = client_id_binance();
62        let id3 = client_id_dydx();
63        assert_eq!(client_id_hash(&id1), client_id_hash(&id2));
64        assert_ne!(client_id_hash(&id1), client_id_hash(&id3));
65    }
66}
nautilus_model/ffi/identifiers/client_id.rs

nautilus_model/ffi/identifiers/
client_id.rs
