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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <string>
#include "common/logging/log.h"
namespace Log {
struct ClassInfo;
/**
* Implements a log message filter which allows different log classes to have different minimum
* severity levels. The filter can be changed at runtime and can be parsed from a string to allow
* editing via the interface or loading from a configuration file.
*/
class Filter {
public:
/// Initializes the filter with all classes having `default_level` as the minimum level.
Filter(Level default_level);
/// Resets the filter so that all classes have `level` as the minimum displayed level.
void ResetAll(Level level);
/// Sets the minimum level of `log_class` (and not of its subclasses) to `level`.
void SetClassLevel(Class log_class, Level level);
/**
* Sets the minimum level of all of `log_class` subclasses to `level`. The level of `log_class`
* itself is not changed.
*/
void SetSubclassesLevel(const ClassInfo& log_class, Level level);
/**
* Parses a filter string and applies it to this filter.
*
* A filter string consists of a space-separated list of filter rules, each of the format
* `<class>:<level>`. `<class>` is a log class name, with subclasses separated using periods.
* A rule for a given class also affects all of its subclasses. `*` wildcards are allowed and
* can be used to apply a rule to all classes or to all subclasses of a class without affecting
* the parent class. `<level>` a severity level name which will be set as the minimum logging
* level of the matched classes. Rules are applied left to right, with each rule overriding
* previous ones in the sequence.
*
* A few examples of filter rules:
* - `*:Info` -- Resets the level of all classes to Info.
* - `Service:Info` -- Sets the level of Service and all subclasses (Service.FS, Service.APT,
* etc.) to Info.
* - `Service.*:Debug` -- Sets the level of all Service subclasses to Debug, while leaving the
* level of Service unchanged.
* - `Service.FS:Trace` -- Sets the level of the Service.FS class to Trace.
*/
void ParseFilterString(const std::string& filter_str);
bool ParseFilterRule(const std::string::const_iterator start, const std::string::const_iterator end);
/// Matches class/level combination against the filter, returning true if it passed.
bool CheckMessage(Class log_class, Level level) const;
private:
std::array<Level, (size_t)Class::Count> class_levels;
};
}
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