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1 | // SPDX-FileCopyrightText: 2022-2023 Dennis Gläser <dennis.glaeser@iws.uni-stuttgart.de> | ||
2 | // SPDX-License-Identifier: MIT | ||
3 | /*! | ||
4 | * \file | ||
5 | * \ingroup Common | ||
6 | * \brief Functionality for styling and logging strings. | ||
7 | */ | ||
8 | #ifndef GRIDFORMAT_COMMON_LOGGING_HPP_ | ||
9 | #define GRIDFORMAT_COMMON_LOGGING_HPP_ | ||
10 | |||
11 | #include <array> | ||
12 | #include <ranges> | ||
13 | #include <utility> | ||
14 | #include <concepts> | ||
15 | #include <iostream> | ||
16 | #include <string_view> | ||
17 | #include <algorithm> | ||
18 | #include <string> | ||
19 | |||
20 | namespace GridFormat { | ||
21 | |||
22 | //! \addtogroup Common | ||
23 | //! \{ | ||
24 | |||
25 | #ifndef DOXYGEN | ||
26 | namespace Detail { | ||
27 | |||
28 | template<std::size_t size> | ||
29 | struct AnsiiCodes { | ||
30 | template<std::integral... Args> requires(sizeof...(Args) == size) | ||
31 | constexpr explicit AnsiiCodes(Args&&... args) { | ||
32 | if constexpr (size > 0) | ||
33 | _set_code<0>(std::forward<Args>(args)...); | ||
34 | } | ||
35 | |||
36 | 12118 | std::string format(std::string_view msg) const { | |
37 | 12118 | std::string result; | |
38 |
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28166 | for (auto _code : _codes) |
39 |
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16048 | result += _format_code(_code); |
40 |
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12118 | result += msg; |
41 |
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12118 | result += _format_code(0); |
42 | 12118 | return result; | |
43 | ✗ | } | |
44 | |||
45 | private: | ||
46 | std::array<int, size> _codes; | ||
47 | |||
48 | template<int i, std::integral T, std::integral... Ts> | ||
49 | constexpr void _set_code(T&& code, Ts&&... codes) { | ||
50 | _codes[i] = code; | ||
51 | if constexpr (sizeof...(Ts) > 0) | ||
52 | _set_code<i+1>(std::forward<Ts>(codes)...); | ||
53 | } | ||
54 | |||
55 | 28166 | std::string _format_code(int code) const { | |
56 |
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84498 | return std::string{"\033["} + std::to_string(code) + "m"; |
57 | } | ||
58 | }; | ||
59 | |||
60 | template<std::integral... Args> | ||
61 | AnsiiCodes(Args&&... args) -> AnsiiCodes<sizeof...(Args)>; | ||
62 | |||
63 | } // namespace Detail | ||
64 | #endif // DOXYGEN | ||
65 | |||
66 | //! Style the given string as a warning | ||
67 | 1962 | std::string as_warning(std::string_view msg) { | |
68 | static constexpr Detail::AnsiiCodes codes{1, 33}; | ||
69 | 1962 | return codes.format(msg); | |
70 | } | ||
71 | |||
72 | //! Style the given string as an error | ||
73 | 3 | std::string as_error(std::string_view msg) { | |
74 | static constexpr Detail::AnsiiCodes codes{1, 31}; | ||
75 | 3 | return codes.format(msg); | |
76 | } | ||
77 | |||
78 | //! Style the given string as highlighted | ||
79 | 4094 | std::string as_highlight(std::string_view msg) { | |
80 | static constexpr Detail::AnsiiCodes codes{1}; | ||
81 | 4094 | return codes.format(msg); | |
82 | } | ||
83 | |||
84 | //! Log a warning message. | ||
85 | 1962 | void log_warning(std::string_view msg, std::ostream& s = std::cout) { | |
86 |
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1962 | if (msg.empty()) |
87 | ✗ | return; | |
88 | |||
89 | 1962 | constexpr std::string_view context = "[GFMT]"; | |
90 | 1962 | constexpr std::string_view prefix = "Warning"; | |
91 | 1962 | constexpr std::size_t indentation = context.size() + 1 + prefix.size() + 2; | |
92 |
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1962 | s << context << " " << as_warning(prefix) << ": "; |
93 |
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1962 | std::ranges::for_each( |
94 |
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3924 | std::views::split(msg, '\n') | std::views::transform([] (const auto& line_chars) { |
95 | 1966 | std::string line; | |
96 |
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1966 | std::ranges::copy(line_chars, std::back_inserter(line)); |
97 | 1966 | return line; | |
98 |
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1962 | }), |
99 | 1966 | [&, i=0] (const std::string& line) mutable { | |
100 |
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3936 | s << (i++ == 0 ? "" : std::string(indentation, ' ')) << line << std::endl; |
101 | 1966 | } | |
102 | ); | ||
103 | } | ||
104 | |||
105 | //! \} group Common | ||
106 | |||
107 | } // namespace GridFormat | ||
108 | |||
109 | #endif // GRIDFORMAT_COMMON_LOGGING_HPP_ | ||
110 |