GCC Code Coverage Report

Directory: ./
File: tasks/gutyansky_a_monte_carlo_multi_dimension/common/include/function_registry.hpp
Date: 2026-01-10 02:40:41
Exec Total Coverage
Lines: 31 32 96.9%
Functions: 3 3 100.0%
Branches: 19 20 95.0%
Line Branch Exec Source
1 #pragma once
2
3 #include <cmath>
4 #include <cstddef>
5 #include <functional>
6 #include <optional>
7 #include <span>
8
9 namespace gutyansky_a_monte_carlo_multi_dimension {
10
11 class FunctionRegistry final {
12 public:
13 using IntegralFunction = std::function<double(std::span<double>)>;
14
15 152 struct FunctionDescription {
16 size_t n_dims;
17 IntegralFunction func;
18 };
19
20 152 static std::optional<FunctionDescription> GetIntegralFunction(size_t func_id) {
21 auto f_const = [](std::span<double> /* not used */) { return 1.0; };
22 auto f_linear = [](std::span<double> x) {
23 double res = 0.0;
24
25
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 18000000 for (auto val : x) {
26 13500000 res += val;
27 }
28
29 return res;
30 };
31 auto f_product = [](std::span<double> x) {
32 double res = 1.0;
33
34
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 31500000 for (auto val : x) {
35 27000000 res *= val;
36 }
37
38 return res;
39 };
40 auto f_quadric = [](std::span<double> x) {
41 double res = 0.0;
42
43
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 31500000 for (auto val : x) {
44 22500000 res += val * val;
45 }
46
47 return res;
48 };
49 4500000 auto f_gauss = [](std::span<double> x) {
50 double sum = 0.0;
51
52
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 13500000 for (auto val : x) {
53 9000000 sum += val * val;
54 }
55
56 4500000 return std::exp(-sum);
57 };
58 4500000 auto f_trig = [](std::span<double> x) { return std::sin(x[0]) * std::cos(x[1]); };
59 auto f_sphere = [](std::span<double> x) {
60 double r2 = 0.0;
61
62
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63 9000000 r2 += val * val;
64 }
65
66
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 4500000 return (r2 <= 1.0) ? 1.0 : 0.0;
67 };
68
69
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 152 switch (func_id) {
70 19 case 0:
71 19 return FunctionDescription{.n_dims = 0, .func = f_const};
72 19 case 1:
73 19 return FunctionDescription{.n_dims = 0, .func = f_linear};
74 19 case 2:
75 19 return FunctionDescription{.n_dims = 0, .func = f_product};
76 38 case 3:
77 38 return FunctionDescription{.n_dims = 0, .func = f_quadric};
78 19 case 4:
79 19 return FunctionDescription{.n_dims = 0, .func = f_gauss};
80 19 case 5:
81 19 return FunctionDescription{.n_dims = 2, .func = f_trig};
82 19 case 6:
83 19 return FunctionDescription{.n_dims = 0, .func = f_sphere};
84 default:
85 ✗ return std::nullopt;
86 }
87 }
88 };
89
90 } // namespace gutyansky_a_monte_carlo_multi_dimension
91