rssn 0.2.9

A comprehensive scientific computing library for Rust, aiming for feature parity with NumPy and SymPy.
Documentation 
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

//! JSON-based FFI API for symbolic vector calculus functions.

use std::os::raw::c_char;

use serde::Deserialize;
use serde::Serialize;

use crate::ffi_apis::common::from_json_string;
use crate::ffi_apis::common::to_json_string;
use crate::symbolic::core::Expr;
use crate::symbolic::vector::Vector;
use crate::symbolic::vector_calculus::ParametricCurve;
use crate::symbolic::vector_calculus::ParametricSurface;
use crate::symbolic::vector_calculus::Volume;
use crate::symbolic::vector_calculus::line_integral_scalar;
use crate::symbolic::vector_calculus::line_integral_vector;
use crate::symbolic::vector_calculus::surface_integral;
use crate::symbolic::vector_calculus::volume_integral;

#[derive(Serialize, Deserialize)]
struct LineIntegralScalarInput {
    scalar_field: Expr,
    curve: ParametricCurve,
}

#[derive(Serialize, Deserialize)]
struct LineIntegralVectorInput {
    vector_field: Vector,
    curve: ParametricCurve,
}

#[derive(Serialize, Deserialize)]
struct SurfaceIntegralInput {
    vector_field: Vector,
    surface: ParametricSurface,
}

#[derive(Serialize, Deserialize)]
struct VolumeIntegralInput {
    scalar_field: Expr,
    volume: Volume,
}

/// Computes the line integral of a scalar field (JSON).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_line_integral_scalar_json(input_json: *const c_char) -> *mut c_char {
    let input: Option<LineIntegralScalarInput> = from_json_string(input_json);

    let input = match input {
        | Some(i) => i,
        | None => {
            return std::ptr::null_mut();
        },
    };

    let result = line_integral_scalar(&input.scalar_field, &input.curve);

    to_json_string(&result)
}

/// Computes the line integral of a vector field (JSON).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_line_integral_vector_json(input_json: *const c_char) -> *mut c_char {
    let input: Option<LineIntegralVectorInput> = from_json_string(input_json);

    let input = match input {
        | Some(i) => i,
        | None => {
            return std::ptr::null_mut();
        },
    };

    let result = line_integral_vector(&input.vector_field, &input.curve);

    to_json_string(&result)
}

/// Computes the surface integral (flux) of a vector field (JSON).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_surface_integral_json(input_json: *const c_char) -> *mut c_char {
    let input: Option<SurfaceIntegralInput> = from_json_string(input_json);

    let input = match input {
        | Some(i) => i,
        | None => {
            return std::ptr::null_mut();
        },
    };

    let result = surface_integral(&input.vector_field, &input.surface);

    to_json_string(&result)
}

/// Computes the volume integral of a scalar field (JSON).
#[unsafe(no_mangle)]
pub extern "C" fn rssn_volume_integral_json(input_json: *const c_char) -> *mut c_char {
    let input: Option<VolumeIntegralInput> = from_json_string(input_json);

    let input = match input {
        | Some(i) => i,
        | None => {
            return std::ptr::null_mut();
        },
    };

    let result = volume_integral(&input.scalar_field, &input.volume);

    to_json_string(&result)
}