key_value 类型配置文件的解析

 #include <iostream>
 #include <string>
 #include <stdint.h>
 #include <map>
 #include <fstream>
 #include <stdlib.h>
 #include <stdio.h>

 enum
 {
     enmMaxConfigWordLen = ,
 };

 typedef std::map<std::string,std::string> ATTRMAP;

 void GetTextFileContent(const char *fileName,char buf[],const uint32_t maxBufLen,uint32_t &readBufLen)
 {
     std::ifstream file(fileName,std::ios::in);
     if(!file)
     {
         return ;
     }
     char c;
     readBufLen = ;
     while(file.get(c) && readBufLen < maxBufLen)
     {
         if(c != '\n' && c != ' ' && c != )
         {
             buf[readBufLen++] = c;
         }
     }
     buf[readBufLen]='\0';
 }

 void GetAllAttrFromStr(const char *buf,const uint32_t bufLen,ATTRMAP &attrMap)
 {
     char key[enmMaxConfigWordLen],value[enmMaxConfigWordLen];
     int32_t flag = ,len = ;       //0->key,1->value
     for(uint32_t i = ;i < bufLen; ++i)
     {
         const char &c = buf[i];
         switch(c)
         {
         case '{':flag=;break;
         case '}':
             value[len] = '\0';
             attrMap[key] = value;
             break;
         case ':':
             key[len] = '\0';
             len = ;
             flag = ;
             break;
         case ',':
             value[len] = '\0';
             len = ;
             flag = ;
             attrMap[key] = value;
             break;
         default:
             if( flag ==  )
             {
                 key[len++] = c;
             }
             else if( flag ==  )
             {
                 value[len++] = c;
             }
             break;
         }
     }
 }

 int32_t main()
 {
     const uint32_t maxFileBufLen = ;
     char buf[maxFileBufLen];
     uint32_t bufLen;
     GetTextFileContent("dbconfig.cfg",buf,maxFileBufLen,bufLen);
     ATTRMAP attrMap;
     GetAllAttrFromStr(buf,bufLen,attrMap);
     std::string szHost = attrMap["host"];
     std::string szUsr = attrMap["user"];
     std::string szPasswd = attrMap["passwd"];
     std::string szDbName = attrMap["dbname"];
     std::string szTableName = attrMap["tablename"];
     uint32_t unPort = atol(attrMap["port"].c_str());
     printf("szHost = '%s'\nszUsr = '%s'\nszPasswd = '%s'\nszDbName = '%s'\nszTableName = '%s'\nunPort = %d\n",\
         szHost.c_str(),szUsr.c_str(),szPasswd.c_str(),szDbName.c_str(),szTableName.c_str(),unPort);
     return ;
 }

测试文件:

{
    host:192.168.75.134,
    port:,
    user:sdo,
    passwd:,
    dbname:sdo_config,
    tablename:sdo_item
}

测试结果:

szHost = '192.168.75.134'
szUsr = 'sdo'
szPasswd = ''
szDbName = 'sdo_config'
szTableName = 'sdo_item'
unPort =