C++ cmake实现日志类的示例代码
作者：咩~~
CMake是一个跨平台的安装（编译）工具，可以用简单的语句来描述所有平台的安装(编译过程)。本文就来利用cmake实现日志类，感兴趣的小伙伴可以了解一下
Logger.h
#pragma once
#include <fstream>
#include <sstream>
#include <iostream>
#include <string>
#define NAME_SPACE_START(name) namespace name {
#define NAME_SPACE_END }
#ifndef _LOGGER_
#define _LOGGER_
NAME_SPACE_START(Log)
class Logger{
public:
Logger() = delete;
Logger(const Logger&) = delete;
Logger(std::string logFilePath = "", std::string logFileName = "");
~Logger() = default;
void LogStart(std::string context);
void LogEnd(std::string context);
void Debug(std::string context);
void Error(std::string context);
void Warning(std::string context);
void Info(std::string context);
bool OpenFile(std::string absolutePath);
bool CloseFile();
std::stringstream GetCurrentTime();
public:
static std::string m_logFilePath;
static std::string m_title;
private:
std::ofstream _file;
std::string absPath;
};
NAME_SPACE_END
#endif //!_LOGGER_
Logger.cpp
#include "logger.h"
#include <ctime>
#include <exception>
#include <fstream>
#include <ios>
#include <iterator>
#include <ostream>
#include <sstream>
#include <streambuf>
#include <string>
#include <time.h>
std::string basePath = "C:\\"; //日志路径
std::string baseTitle = "logger.txt"; //日志文件名
NAME_SPACE_START(Log)
std::string Logger::m_logFilePath = basePath;
std::string Logger::m_title = baseTitle;
Logger::Logger(std::string logFilePath, std::string logFileName){
std::string absolutePath = "";
if(logFilePath != ""){
absolutePath += logFilePath;
}
else{
absolutePath += Logger::m_logFilePath;
}
if(logFileName != ""){
absolutePath += logFileName;
}
else{
absolutePath += Logger::m_title;
}
this->absPath = absolutePath;
}
void Logger::LogStart(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"------------------------------Log Start"
<<" "<<context<<" "
<<"------------------------------"<<std::endl;
this->CloseFile();
}
void Logger::LogEnd(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"------------------------------Log End"
<<" "<<context<<" "
<<"------------------------------"<<std::endl;
this->CloseFile();
}
void Logger::Debug(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"[Log Debug]:"
<<context<<std::endl;
this->CloseFile();
}
void Logger::Error(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"[Log Error]:"
<<context<<std::endl;
this->CloseFile();
}
void Logger::Warning(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"[Log Warning]:"
<<context<<std::endl;
this->CloseFile();
}
void Logger::Info(std::string context = ""){
if(!this->OpenFile(this->absPath)) return;
std::stringstream ss=GetCurrentTime();
_file<<ss.str()
<<"[Log Info]:"
<<context<<std::endl;
this->CloseFile();
}
bool Logger::OpenFile(std::string absolutePath){
try {
this->_file.open(absolutePath, std::ios::out | std::ios::app);
if(!_file.is_open()){
return false;
}
return true;
} catch (std::exception ex) {
return false;
}
}
bool Logger::CloseFile(){
try{
this->_file.close();
return true;
}
catch(std::exception ex){
return false;
}
}
std::stringstream Logger::GetCurrentTime(){
std::stringstream ss;
time_t now=time(nullptr);
tm curr_tm;
localtime_s(&curr_tm, &now);
ss<<curr_tm.tm_year<<"-"<<curr_tm.tm_mon<<"-"<<curr_tm.tm_yday
<<" "<<curr_tm.tm_hour<<":"<<curr_tm.tm_min<<":"<<curr_tm.tm_sec
<<" ";
return ss;
}
NAME_SPACE_END
main.cpp
#include <iostream>
#include "logger.h"
using namespace std;
using namespace Log;
int main(){
Logger log("F:/Visual-Studio-practice/vscode/mySource/");
log.LogStart("main");
log.Debug("main");
log.Warning("main");
log.Error("main");
log.Info("main");
log.LogEnd("main");
return 0;
}
日志图片
本程序使用cmake生成
cmake文件
cmake_minimum_required(VERSION 3.0.0)
project(logger CXX)
set(CMAKE_INSTALL_PREFIX "F:/Visual-Studio-practice/vscode/mySource/build")
file(GLOB SOURCE_FILE ./src/logger.cpp)
add_library(logger_static STATIC ${SOURCE_FILE})
target_include_directories(logger_static PUBLIC header)
最外层cmake
cmake_minimum_required(VERSION 3.0.0)
project(MAIN VERSION 0.1.0)
set(CMAKE_BUILD_TYPE Debug)
set(UTILS_PATH ${PROJECT_SOURCE_DIR}/utils)
add_subdirectory(utils/Log)
add_executable(MAIN main.cpp)
include_directories(${UTILS_PATH}/Log/header)
target_link_libraries(MAIN logger_static)
enable_testing()
add_test(NAME MAIN_TEST COMMAND MAIN)
目录结构如下
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