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标题: c++ 简单的日志类 CCLog [打印本页]
作者: 天空闲话    时间: 2024-6-15 02:24
标题: c++ 简单的日志类 CCLog
此日志类，简单地实现了向标准输出控制台和文件输出日志信息的功能，并能在这两者之间举行切换输出，满意输出日志的不同需求。
代码如下：


  1. /*
  2. *  CCLog.h
  3. *  c++_common_codes
  4. *
  5. *  Created by xichen on 12-1-12.
  6. *  Copyright 2012 cc_team. All rights reserved.
  7. *
  8. */
  9. #ifndef CC_LOG_H
  10. #define CC_LOG_H
  12. #include "ccString.h"
  13. #include <cstdio>
  15. typedef enum _LOG_TYPE
  16. {
  17.     LOG_TYPE_CONSOLE,
  18.     LOG_TYPE_FILE,
  20.     LOG_TYPE_MAX
  21. }LOG_TYPE;
  23. class CCLog
  24. {
  25. public:
  26.     CCLog(const char * fileName = NULL, const char * mode = "at+");    // by default, open file by "at+" mode
  27.     ~CCLog();
  29. public:
  30.     unsigned        write(const CCString & str);
  31.     unsigned        writeEndl();
  32.     void        clearAllData();            // if a file is opened, all contents of the file will be cleared, the file will be opened a second time.
  34. public:
  35.     void        setWriteToConsole();
  36.     void        setWriteToFile();
  38. public:
  39.     LOG_TYPE        getLogType() const { return _logType; }
  40.     CCString        getLogFileName() const { return _fileName; }
  42. private:   
  43.     void        clearConsole()            // not coding ok
  44.     {
  45.        
  46.     }
  48. private:
  49.     CCLog(const CCLog & log);
  50.     CCLog & operator=(const CCLog & log);
  52. private:
  53.     FILE        *_file;
  54.     FILE        *_backupFile;
  55.     CCString        _fileName;
  56.     LOG_TYPE        _logType;
  57. };
  59. #endif
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  1. /*
  2. *  CCLog.cpp
  3. *  c++_common_codes
  4. *
  5. *  Created by xichen on 12-1-12.
  6. *  Copyright 2012 cc_team. All rights reserved.
  7. *
  8. */
  9. #include "ccLog.h"
  11. CCLog::CCLog( const char * fileName /*= NULL*/, const char * mode /*= "at+"*/ )
  12. {
  13.     if(fileName == NULL)
  14.     {
  15.         _file = _backupFile = NULL;
  16.         _logType = LOG_TYPE_CONSOLE;
  17.         return;
  18.     }
  20.     _logType = LOG_TYPE_FILE;
  21.     _file = fopen(fileName, mode);
  22.     _backupFile = _file;
  23.     if(_file == NULL)
  24.         std::cerr << "Open file error" << std::endl;
  25.     else
  26.         _fileName = CCString(fileName);
  27. }
  29. CCLog::~CCLog()
  30. {
  31.     if(_logType == LOG_TYPE_FILE)
  32.     {
  33.         if(_file != NULL)
  34.         {
  35.             fclose(_file);
  36.             return;
  37.         }
  38.         if(_backupFile != NULL)
  39.         {
  40.             fclose(_backupFile);
  41.         }
  42.     }
  43. }
  45. unsigned CCLog::write( const CCString & str )
  46. {
  47.     if(_logType == LOG_TYPE_CONSOLE)
  48.     {
  49.         std::cout << str;
  50.         return str.length();        // it's not accurate. ????
  51.     }
  53.     fseek(_file, 0, SEEK_END);
  54.     return fwrite(str.c_str(), str.length(), 1, _file);
  55. }
  57. unsigned CCLog::writeEndl()
  58. {
  59.     return write(CCString("\n"));
  60. }
  63. void CCLog::clearAllData()
  64. {
  65.     if(_logType == LOG_TYPE_CONSOLE)
  66.         return;
  68.     if(_backupFile != NULL)
  69.         _file = _backupFile;
  71.     fclose(_file);
  72.     _file = fopen(CCString(_fileName), "wt+");            // clear all the data of file
  73.     _backupFile = _file;
  74.     if(_file == NULL)
  75.         std::cerr << "clearAllData:Open file error" << std::endl;
  76. }
  78. void CCLog::setWriteToConsole()
  79. {
  80.     _logType = LOG_TYPE_CONSOLE;
  81. }
  83. void CCLog::setWriteToFile()
  84. {
  85.     _logType = LOG_TYPE_FILE;
  86. }
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简单地测试代码如下：
  1. void ccTestLog()
  2. {
  3. #if 1            // CCLog
  4.     CCLog * log = new CCLog(NULL);
  5.     log->write("hello");
  6.     log->write("\t1\n");
  7.     log->write("\txichen\n");
  9.     delete log;
  10.     log = new CCLog("d:\\test\\logtest.txt");
  11.     log->write("ab\t\n1");
  12.     delete log;
  13.     log = new CCLog("d:\\test\\logtest.txt");
  14.     log->write("xiche\t123");
  15.     log->clearAllData();
  16.     log->write("after clear");
  17.     log->setWriteToConsole();
  18.     log->write("the console info");
  19.     log->setWriteToFile();
  20.     log->write("the file content");
  21.     log->writeEndl();
  22.     log->write("the next line\nhehe");
  23.     delete log;
  24. #endif
  25. }
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