C语言如何解析配置文件？

╰半夏微凉° 2022-12-02 00:54 216阅读 0赞

一般服务器都是通过配置文件的解析获取关键的参数，不能够老是通过执行命令传进来，那么就有了配置文件，有了配置文件，就需要做配置文件的解析。

一般C语言格式配置文件的格式：

#config.ini 
    
    #the web is daemon or not
    daemon = yes 
    
    #port set 
    http=8000
    https=4444
      
    #default certifile
    ca= cert.pem
    
    #show dir or not
    dir= yes 
    
    #dossl or not
    dossl=yes
    
    #the web root position
    root  =doc                 
    
    #log position
    log = access.log
    
    #access ip mask
    mask =0.0.0.0/0.0.0.0           
    
    #cgi-bin dir location
    cgi  =cgi-bin

C 语言解析demo：

static char* getconfig(char* name)
    { 
    /* pointer meaning: ...port...=...8000... | | | | | *fs | | | *be f->forward b-> back *fe | *bs s->start e-> end *equal */
    	static char info[64];
    	int find=0;
    	char tmp[256],fore[64],back[64],tmpcwd[MAXLINE];
    	char *fs,*fe,*equal,*bs,*be,*start;
    
    	strcpy(tmpcwd,cwd);
    	strcat(tmpcwd,"/");
    	FILE *fp=getfp(strcat(tmpcwd,"config.ini"));
    	while(fgets(tmp,255,fp)!=NULL)
    	{ 
    		start=tmp;
    		equal=strchr(tmp,'=');
    
    		while(isblank(*start))
    			++start;
    		fs=start;
    
    		if(*fs=='#')
    			continue;
    		while(isalpha(*start))
    			++start;
    		fe=start-1;
    
    		strncpy(fore,fs,fe-fs+1);
    		fore[fe-fs+1]='\0';
    		if(strcmp(fore,name)!=0)
    			continue;
    		find=1;
    
    		start=equal+1;
    		while(isblank(*start))
    			++start;
    		bs=start;
    
    		while(!isblank(*start)&&*start!='\n')
    			++start;
    		be=start-1;
    
    		strncpy(back,bs,be-bs+1);
    		back[be-bs+1]='\0';
    		strcpy(info,back);
    		break;
    	}
    	if(find)
    		return info;
    	else
    		return NULL;
    }