A simple log system C code implementation, log c code

A simple log system C code implementation, log c code

Problem description

To implement a simple Windows-based log system, the style of the content required to be written into the log file is as follows:

[Time] + [file name] + [log level] + log Content

For example:

[2015.02.2514: 35: 13.143] [WriteLog. c] [INFO] This is a test!

"14:35:13. 143 "indicates the current time (accurate to milliseconds)," WriteLog. c "indicates the name of the printed log Content," INFO "indicates the Log Level, and" This is a test!" Is the specific log Content.

 

Algorithm flow

Figure 1 Overall procedure

 

Figure 2 General execution process of log writing

 

C code implementation

Configuration File Content

The configuration file is named Config. ini. Its content is shown in the following figure:

[LOG]

; LogLevel, 0-Fatal 1-Error 2-Warn 3-Info 4-Trace 5-Debug 6-All

LogLevel = 5

; Log dir

LogDir = D :\\ Test

 

"LogLevel" indicates the Log Level, and "LogDir" indicates the path where the log file is stored (Note: do not end with \ at the end ). You must change the values of each configuration item according to your actual needs.

 

Program description

(1) The program is directly compiled and run in VC ++.

(2) the configuration file Config. ini is directly placed in the project directory at the same level as the WriteLog. c file.

(3) You can selectively print some log information by changing the configuration value of "LogLevel.

 

Program running result

(1) set "LogLevel" to 3. The log file content is as follows:

 

(2) Set "LogLevel" to 5. The log file content is as follows:

 

It can be seen that the program can output the corresponding log information according to the configured log level.

 

 

 

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