開源純C日誌函數庫iLOG3快速入門（8、若是你喜歡簡單日誌函數甚於日誌函數庫）

開源純C日誌函數庫iLOG3快速入門（8、若是你喜歡簡單日誌函數甚於日誌函數庫）

不少網友來信堅持表達了在項目中應使用簡單日誌函數，而不喜歡日誌函數庫，我與之反覆爭論無果，不過話說回來，我也喜歡短小輕快的日誌函數庫，而不是融入太多功能的臃腫庫，好比日誌轉檔我仍是堅持用外部shell來實現會更好，這樣的日誌函數庫既能夠小不少，也能夠更輕快穩定，我只是迫於另一批功能控網友的「威脅」而加入了太多的功能，他們喜歡極端的一攬子解決方案，而且展現其它諸如log4c也實現了這些功能爲由證實他們是正確的，若是我不實現就免談。

最近在研發一個小型的應用服務器平臺tcpdaemon，裏面須要日誌功能，但整個tcpdaemon代碼不多，比iLOG3小的多，因而讓我想到最上面的那些網友的話，通過反覆考量，我決定給個人iLOG3補充一點小鬼靈精怪——附帶一個單獨的迷你型的簡單日誌函數，這樣你們終於都知足了吧。

src/新增LOGC.h,LOGC.c，這兩個源文件不編譯進libiLOG3.so，而是獨立出來提供喜歡簡單日誌函數而反感日誌函數庫的朋友單獨複製到他的項目中去直接源碼包含使用。好比tcpdaemon項目

tcpdaemon-1.1.0/
    src/
        tcpdaemon.h
        main.c
        tcpdaemon.c
        worker.c
        LOGC.h
        LOGC.c
        ...

在iLOG3的test目錄中有測試案例test_logc.c

#include "../src/LOGC.h"

int test_logc()
{
    char    buf[ 64 + 1 ] ;
    long    buflen ;
    
    SetLogFile( "%s/log/test_logc.log" , getenv("HOME") );
    SetLogLevel( LOGLEVEL_INFO );
    
    DebugLog( __FILE__ , __LINE__ , "call DebugLog" );
    InfoLog( __FILE__ , __LINE__ , "call InfoLog" );
    WarnLog( __FILE__ , __LINE__ , "call WarnLog" );
    ErrorLog( __FILE__ , __LINE__ , "call ErrorLog" );
    FatalLog( __FILE__ , __LINE__ , "call FatalLog" );
    
    memset( buf , 0x00 , sizeof(buf) );
    buflen = sizeof(buf) - 1 ;
    DebugHexLog( __FILE__ , __LINE__ , buf , buflen , "call DebugHexLog" );
    InfoHexLog( __FILE__ , __LINE__ , buf , buflen , "call InfoHexLog" );
    WarnHexLog( __FILE__ , __LINE__ , buf , buflen , "call WarnHexLog" );
    ErrorHexLog( __FILE__ , __LINE__ , buf , buflen , "call ErrorHexLog" );
    FatalHexLog( __FILE__ , __LINE__ , buf , buflen , "call FatalHexLog" );
    
    return 0;
}

int main()
{
    return -test_logc();
}

編譯時只需把LOGC.c一塊兒編譯連接便可

$ gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I. -c test_logc.c
$ gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I. -c ../src/LOGC.c
$ gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test_logc test_logc.o LOGC.o -lpthread
$ ./test_logc
$ cat $HOME/log/test_logc.log
2014-07-20 22:35:12.890000 | INFO  | 1556:3284:test_logc.c:12 | call InfoLog
2014-07-20 22:35:12.906000 | WARN  | 1556:3284:test_logc.c:13 | call WarnLog
2014-07-20 22:35:12.906000 | ERROR | 1556:3284:test_logc.c:14 | call ErrorLog
2014-07-20 22:35:12.906000 | FATAL | 1556:3284:test_logc.c:15 | call FatalLog
2014-07-20 22:35:12.906000 | INFO  | 1556:3284:test_logc.c:20 | call InfoHexLog
             0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-07-20 22:35:12.906000 | WARN  | 1556:3284:test_logc.c:21 | call WarnHexLog
             0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-07-20 22:35:12.906000 | ERROR | 1556:3284:test_logc.c:22 | call ErrorHexLog
             0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
2014-07-20 22:35:12.906000 | FATAL | 1556:3284:test_logc.c:23 | call FatalHexLog
             0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F    0123456789ABCDEF
0x00000000   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000010   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000020   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0x00000030   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................

很簡單吧？那就趕忙下載來玩玩吧 首頁傳送門 : [url]http://git.oschina.net/calvinwilliams/iLOG3[/url] 源代碼包doc目錄中包含了用戶指南和參考手冊，裏面有更詳盡的說明