nautilus-model 0.55.0

Domain model for the Nautilus trading engine
Documentation 
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// -------------------------------------------------------------------------------------------------
//  Copyright (C) 2015-2026 Nautech Systems Pty Ltd. All rights reserved.
//  https://nautechsystems.io
//
//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
//  You may not use this file except in compliance with the License.
//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
// -------------------------------------------------------------------------------------------------

use std::ffi::c_char;

use nautilus_core::{MUTEX_POISONED, ffi::string::cstr_as_str};

use crate::{identifiers::Venue, venues::VENUE_MAP};

/// Returns a Nautilus identifier from a C string pointer.
///
/// # Safety
///
/// Assumes `ptr` is a valid C string pointer.
#[unsafe(no_mangle)]
pub unsafe extern "C" fn venue_new(ptr: *const c_char) -> Venue {
    let value = unsafe { cstr_as_str(ptr) };
    Venue::from(value)
}

#[unsafe(no_mangle)]
pub extern "C" fn venue_hash(id: &Venue) -> u64 {
    id.inner().precomputed_hash()
}

#[unsafe(no_mangle)]
pub extern "C" fn venue_is_synthetic(venue: &Venue) -> u8 {
    u8::from(venue.is_synthetic())
}

/// Checks if a venue code exists in the internal map.
///
/// # Safety
///
/// Assumes `code_ptr` is a valid NUL-terminated UTF-8 C string pointer.
///
/// # Panics
///
/// Panics if the internal mutex `VENUE_MAP` is poisoned.
#[unsafe(no_mangle)]
pub unsafe extern "C" fn venue_code_exists(code_ptr: *const c_char) -> u8 {
    let code = unsafe { cstr_as_str(code_ptr) };
    u8::from(VENUE_MAP.lock().expect(MUTEX_POISONED).contains_key(code))
}

/// Converts a UTF-8 C string pointer to a `Venue`.
///
/// # Safety
///
/// Assumes `code_ptr` is a valid NUL-terminated UTF-8 C string pointer.
///
/// # Panics
///
/// Panics if the code is not found or invalid (unwrap on `from_code`).
#[unsafe(no_mangle)]
pub unsafe extern "C" fn venue_from_cstr_code(code_ptr: *const c_char) -> Venue {
    let code = unsafe { cstr_as_str(code_ptr) };
    Venue::from_code(code).unwrap()
}