144 lines
3.4 KiB
C++
144 lines
3.4 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 <chrono>
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#include <memory>
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#include <string>
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#include <string_view>
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#include "common/file_util.h"
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#include "common/logging/filter.h"
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#include "common/logging/log.h"
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namespace Log {
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class Filter;
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/**
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* A log entry. Log entries are store in a structured format to permit more varied output
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* formatting on different frontends, as well as facilitating filtering and aggregation.
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*/
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struct Entry {
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std::chrono::microseconds timestamp;
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Class log_class;
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Level log_level;
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std::string filename;
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unsigned int line_num;
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std::string function;
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std::string message;
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bool final_entry = false;
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Entry() = default;
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Entry(Entry&& o) = default;
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Entry& operator=(Entry&& o) = default;
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Entry& operator=(const Entry& o) = default;
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};
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/**
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* Interface for logging backends. As loggers can be created and removed at runtime, this can be
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* used by a frontend for adding a custom logging backend as needed
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*/
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class Backend {
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public:
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virtual ~Backend() = default;
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virtual void SetFilter(const Filter& new_filter) {
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filter = new_filter;
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}
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virtual const char* GetName() const = 0;
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virtual void Write(const Entry& entry) = 0;
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private:
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Filter filter;
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};
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/**
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* Backend that writes to stderr without any color commands
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*/
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class ConsoleBackend : public Backend {
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public:
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static const char* Name() {
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return "console";
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}
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const char* GetName() const override {
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return Name();
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}
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void Write(const Entry& entry) override;
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};
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/**
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* Backend that writes to stderr and with color
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*/
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class ColorConsoleBackend : public Backend {
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public:
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static const char* Name() {
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return "color_console";
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}
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const char* GetName() const override {
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return Name();
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}
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void Write(const Entry& entry) override;
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};
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/**
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* Backend that writes to a file passed into the constructor
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*/
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class FileBackend : public Backend {
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public:
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explicit FileBackend(const std::string& filename);
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static const char* Name() {
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return "file";
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}
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const char* GetName() const override {
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return Name();
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}
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void Write(const Entry& entry) override;
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private:
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FileUtil::IOFile file;
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std::size_t bytes_written;
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};
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/**
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* Backend that writes to Visual Studio's output window
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*/
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class DebuggerBackend : public Backend {
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public:
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static const char* Name() {
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return "debugger";
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}
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const char* GetName() const override {
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return Name();
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}
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void Write(const Entry& entry) override;
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};
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void AddBackend(std::unique_ptr<Backend> backend);
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void RemoveBackend(std::string_view backend_name);
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Backend* GetBackend(std::string_view backend_name);
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/**
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* Returns the name of the passed log class as a C-string. Subclasses are separated by periods
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* instead of underscores as in the enumeration.
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*/
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const char* GetLogClassName(Class log_class);
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/**
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* Returns the name of the passed log level as a C-string.
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*/
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const char* GetLevelName(Level log_level);
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/**
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* The global filter will prevent any messages from even being processed if they are filtered. Each
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* backend can have a filter, but if the level is lower than the global filter, the backend will
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* never get the message
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*/
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void SetGlobalFilter(const Filter& filter);
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} // namespace Log
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