52 lines
2 KiB
C++
52 lines
2 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstddef>
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#include <string_view>
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#include "common/logging/log.h"
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namespace Log {
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/**
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* Implements a log message filter which allows different log classes to have different minimum
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* severity levels. The filter can be changed at runtime and can be parsed from a string to allow
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* editing via the interface or loading from a configuration file.
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*/
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class Filter {
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public:
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/// Initializes the filter with all classes having `default_level` as the minimum level.
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explicit Filter(Level default_level = Level::Info);
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/// Resets the filter so that all classes have `level` as the minimum displayed level.
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void ResetAll(Level level);
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/// Sets the minimum level of `log_class` (and not of its subclasses) to `level`.
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void SetClassLevel(Class log_class, Level level);
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/**
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* Parses a filter string and applies it to this filter.
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*
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* A filter string consists of a space-separated list of filter rules, each of the format
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* `<class>:<level>`. `<class>` is a log class name, with subclasses separated using periods.
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* `*` is allowed as a class name and will reset all filters to the specified level. `<level>`
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* a severity level name which will be set as the minimum logging level of the matched classes.
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* Rules are applied left to right, with each rule overriding previous ones in the sequence.
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*
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* A few examples of filter rules:
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* - `*:Info` -- Resets the level of all classes to Info.
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* - `Service:Info` -- Sets the level of Service to Info.
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* - `Service.FS:Trace` -- Sets the level of the Service.FS class to Trace.
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*/
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void ParseFilterString(std::string_view filter_view);
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/// Matches class/level combination against the filter, returning true if it passed.
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bool CheckMessage(Class log_class, Level level) const;
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private:
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std::array<Level, static_cast<std::size_t>(Class::Count)> class_levels;
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};
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} // namespace Log
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