spdlog/include/c11log/formatter.h
2014-03-28 16:05:09 +03:00

92 lines
2.6 KiB
C++

#pragma once
#include <string>
#include <chrono>
#include <functional>
#include <iomanip>
#include <thread>
#include <cstring>
#include "common_types.h"
#include "details/os.h"
#include "details/stack_oss.h"
namespace c11log
{
namespace formatters
{
class formatter
{
public:
virtual void format_header(const std::string& logger_name, level::level_enum level, const log_clock::time_point& tp, std::ostream& output) = 0;
};
class default_formatter: public formatter
{
public:
// Format: [2013-12-29 01:04:42.900] [logger_name:Info] Message body
void format_header(const std::string& logger_name, level::level_enum level, const log_clock::time_point& tp, std::ostream& output) override
{
_format_time(tp, output);
if(!logger_name.empty())
output << " [" << logger_name << ':' << c11log::level::to_str(level) << "] ";
else
output << " [" << c11log::level::to_str(level) << "] ";
}
private:
void _format_time(const log_clock::time_point& tp, std::ostream &output);
};
} //namespace formatter
} //namespace c11log
// Format datetime like this: [2014-03-14 17:15:22]
inline void c11log::formatters::default_formatter::_format_time(const log_clock::time_point& tp, std::ostream &output)
{
using namespace c11log::details::os;
using namespace std::chrono;
#ifdef _WIN32 //VS2013 doesn't support yet thread_local keyword
__declspec(thread) static char s_cache_str[64];
__declspec(thread) static size_t s_cache_size;
__declspec(thread) static std::time_t s_cache_time_t = 0;
#else
thread_local static char s_cache_str[64];
thread_local static size_t s_cache_size;
thread_local static std::time_t s_cache_time_t = 0;
#endif
//Cache every second
std::time_t tp_time_t = log_clock::to_time_t(tp);
if(tp_time_t != s_cache_time_t)
{
auto tm_now = details::os::localtime(tp_time_t);
details::stack_oss time_oss;
time_oss.fill('0');
time_oss << '[' << tm_now.tm_year + 1900 << '-';
time_oss.width(2);
time_oss << tm_now.tm_mon + 1 << '-';
time_oss.width(2);
time_oss << tm_now.tm_mday << ' ';
time_oss.width(2);
time_oss << tm_now.tm_hour << ':';
time_oss.width(2);
time_oss << tm_now.tm_min << ':';
time_oss.width(2);
time_oss << tm_now.tm_sec << ']';
//Cache the resulted string and its size
s_cache_time_t = tp_time_t;
//const std::string &s = time_oss.str_ref();
bufpair_t buf = time_oss.buf();
std::memcpy(s_cache_str, buf.first, buf.second);
s_cache_size = buf.second;
}
output.write(s_cache_str, s_cache_size);
}