283 lines
6.9 KiB
C++
283 lines
6.9 KiB
C++
#pragma once
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#include <string>
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#include <chrono>
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#include <memory>
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#include <vector>
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#include "formatter.h"
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#include "details/log_msg.h"
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#include "details/fast_oss.h"
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namespace c11log
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{
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namespace details {
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class pattern_appender
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{
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public:
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virtual void append(const details::log_msg& msg, details::fast_oss& oss) = 0;
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};
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// log name appender
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class name_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss << msg.logger_name;
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}
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};
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// log level appender
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class level_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss << level::to_str(msg.level);
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}
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};
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///////////////////////////////////////////////////////////////////////
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// Date time pattern appenders
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///////////////////////////////////////////////////////////////////////
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// year - 4 digit
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class Y_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_year+1900, 4);
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}
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};
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// year - 2 digit
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class y_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_year, 2);
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}
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};
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// month 1-12
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class m_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_mon + 1, 2);
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}
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};
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// day of month 1-31
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class d_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_mday, 2);
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}
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};
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// hours in 24 format 0-23
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class H_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_hour, 2);
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}
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};
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// hours in 12 format 1-12
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class I_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int((msg.tm_time.tm_hour + 1) % 1, 2);
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}
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};
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// ninutes 0-59
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class M_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_min, 2);
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}
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};
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// seconds 0-59
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class S_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_int(msg.tm_time.tm_sec, 2);
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}
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};
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// milliseconds
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class e_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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auto duration = msg.time.time_since_epoch();
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int millis = static_cast<int>(std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() % 1000);
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oss.put_int(millis, 3);
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}
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};
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class t_appender :public pattern_appender
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{
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.put_str(msg.raw);
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}
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};
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class ch_appender :public pattern_appender
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{
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public:
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explicit ch_appender(char ch) : _ch(ch)
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{}
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss.putc( _ch);
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}
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private:
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char _ch;
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};
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class str_appender :public pattern_appender
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{
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public:
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str_appender()
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{}
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void add_ch(char ch)
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{
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_str += ch;
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}
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void append(const details::log_msg& msg, details::fast_oss& oss) override
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{
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oss << _str;
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}
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private:
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std::string _str;
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};
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}
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class pattern_formatter : public formatter
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{
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public:
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explicit pattern_formatter(const std::string& pattern);
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pattern_formatter(const pattern_formatter&) = delete;
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void format(details::log_msg& msg) override;
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private:
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const std::string _pattern;
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std::vector<std::unique_ptr<details::pattern_appender>> _appenders;
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void handle_flag(char flag);
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void compile_pattern(const std::string& pattern);
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};
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}
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inline c11log::pattern_formatter::pattern_formatter(const std::string& pattern)
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{
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compile_pattern(pattern);
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}
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inline void c11log::pattern_formatter::compile_pattern(const std::string& pattern)
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{
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auto end = pattern.end();
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for (auto it = pattern.begin(); it != end; ++it)
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{
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if (*it == '%')
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{
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if (++it != end)
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handle_flag(*it);
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else
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return;
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}
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else
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{
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// chars not following the % sign should be displayed as is
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::ch_appender(*it)));
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}
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}
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}
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inline void c11log::pattern_formatter::handle_flag(char flag)
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{
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switch (flag)
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{
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// logger name
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case 'n':
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::name_appender()));
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break;
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// message log level
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case 'l':
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::level_appender()));
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break;
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// message text
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case('t') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::t_appender()));
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break;
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// year
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case('Y') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::Y_appender()));
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break;
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// year 2 digits
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case('y') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::y_appender()));
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break;
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// month
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case('m') :
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// minute
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::m_appender()));
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break;
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// day in month
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case('d') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::d_appender()));
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break;
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// hour (24)
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case('H') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::H_appender()));
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break;
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// hour (12)
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case('I') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::I_appender()));
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break;
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// minutes
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case('M') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::M_appender()));
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break;
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// seconds
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case('S') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::S_appender()));
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break;
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// milliseconds part
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case('e'):
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::e_appender()));
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break;
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// % sign
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case('%') :
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_appenders.push_back(std::unique_ptr<details::pattern_appender>(new details::ch_appender('%')));
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break;
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}
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}
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inline void c11log::pattern_formatter::format(details::log_msg& msg)
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{
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details::fast_oss oss;
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for (auto &appender : _appenders)
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{
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appender->append(msg, oss);
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}
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oss.write(details::os::eol(), details::os::eol_size());
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msg.formatted = oss.str();
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} |