rsc_osrm 0.1.56

rust wrapper for osrm, folk from TehGoat/rs_osrm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173

#![allow(dead_code)]

use crate::general::CGeneralOptions;
use crate::general::Coordinate;
use crate::general::GeneralOptions;
use crate::{Osrm, Status};
use core::slice;
use std::borrow::ToOwned;
use std::ffi::{c_void, CStr};
use std::os::raw::{c_char, c_double, c_int, c_longlong};
use std::ptr::null;

#[link(name = "c_osrm")]
extern "C" {
    fn nearest_result_destroy(result: *mut CNearestResult);

    fn osrm_nearest(
        osrm: *mut c_void,
        request: *mut CNearestRequest,
        result: *mut *mut CNearestResult,
    ) -> Status;
}

#[repr(C)]
#[derive(Clone)]
pub struct CNearestWaypoint {
    nodes: [c_longlong; 2],
    hint: *const c_char,
    distance: c_double,
    name: *const c_char,
    location: [c_double; 2],
}

pub struct NearestWaypoint {
    pub nodes: [i64; 2],
    pub hint: Option<String>,
    pub distance: f64,
    pub name: String,
    pub location: [f64; 2],
}

impl NearestWaypoint {
    pub fn new(c_waypoints: &CNearestWaypoint) -> NearestWaypoint {
        let mut hint: Option<String> = None;
        if c_waypoints.hint != null() {
            let c_hint_buf: *const c_char = c_waypoints.hint;
            let c_hint_str: &CStr = unsafe { CStr::from_ptr(c_hint_buf) };
            let hint_str_slice: &str = c_hint_str.to_str().unwrap();
            hint = Option::from(hint_str_slice.to_owned());
        }

        let c_name_buf: *const c_char = c_waypoints.name;
        let c_name_str: &CStr = unsafe { CStr::from_ptr(c_name_buf) };
        let name_str_slice: &str = c_name_str.to_str().unwrap();

        NearestWaypoint {
            nodes: c_waypoints.nodes,
            hint,
            distance: c_waypoints.distance,
            name: name_str_slice.to_owned(),
            location: c_waypoints.location,
        }
    }
}

#[repr(C)]
pub struct CNearestResult {
    code: *mut c_char,
    message: *mut c_char,
    waypoints: *mut CNearestWaypoint,
    number_of_waypoints: c_int,
}

pub struct NearestResult {
    pub code: Option<String>,
    pub message: Option<String>,
    pub waypoints: Option<Vec<NearestWaypoint>>,
}

impl NearestResult {
    //noinspection RsBorrowChecker
    pub fn new(c_reasult: &CNearestResult) -> NearestResult {
        let mut code: Option<String> = None;
        if c_reasult.code != std::ptr::null_mut() {
            let c_code_buf: *const c_char = c_reasult.code;
            let c_code_str: &CStr = unsafe { CStr::from_ptr(c_code_buf) };
            let code_str_slice: &str = c_code_str.to_str().unwrap();
            code = Option::from(code_str_slice.to_owned());
        }

        let mut message: Option<String> = None;
        if c_reasult.message != std::ptr::null_mut() {
            let c_message_buf: *const c_char = c_reasult.message;
            let c_message_str: &CStr = unsafe { CStr::from_ptr(c_message_buf) };
            let message_str_slice: &str = c_message_str.to_str().unwrap();
            message = Option::from(message_str_slice.to_owned());
        }

        let mut waypoints: Option<Vec<NearestWaypoint>> = None;

        if c_reasult.waypoints != std::ptr::null_mut() {
            let test_vec = unsafe {
                slice::from_raw_parts(c_reasult.waypoints, c_reasult.number_of_waypoints as usize)
                    .to_vec()
            };

            let mut rs_vec = Vec::new();
            for waypoint in &test_vec {
                rs_vec.push(NearestWaypoint::new(waypoint));
            }

            waypoints = Option::from(rs_vec);
        }

        NearestResult {
            code,
            message,
            waypoints,
        }
    }
}

#[repr(C)]
struct CNearestRequest {
    general_options: CGeneralOptions,
    number_of_results: c_int,
}

impl CNearestRequest {
    fn new(request: &mut NearestRequest) -> CNearestRequest {
        CNearestRequest {
            general_options: CGeneralOptions::new(&mut request.general_options),
            number_of_results: request.number_of_results as c_int,
        }
    }
}

pub struct NearestRequest {
    pub general_options: GeneralOptions,
    pub number_of_results: i32,
}

impl NearestRequest {
    pub fn new(latitude: f64, longitude: f64) -> NearestRequest {
        NearestRequest {
            general_options: GeneralOptions::new(&vec![Coordinate {
                latitude,
                longitude,
                name: None
            }]),
            number_of_results: 1,
        }
    }

    pub fn run(&mut self, osrm: &Osrm) -> (Status, NearestResult) {
        unsafe {
            let mut result: *mut CNearestResult = std::ptr::null_mut();
            let result_ptr: *mut *mut CNearestResult = &mut result;

            let status = osrm_nearest(
                *osrm.config,
                &mut CNearestRequest::new(self) as *mut CNearestRequest,
                result_ptr,
            );

            let converted_result = NearestResult::new(&(*result));

            nearest_result_destroy(result);

            (status, converted_result)
        }
    }
}