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 = 32,
};

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 = 0;
    while(file.get(c) && readBufLen < maxBufLen)
    {
        if(c != '
' && c != ' ' && c != 9)
        {
            buf[readBufLen++] = c;
        }
    }
    buf[readBufLen]='';
}

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


int32_t main()
{
    const uint32_t maxFileBufLen = 1024;
    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'
szUsr = '%s'
szPasswd = '%s'
szDbName = '%s'
szTableName = '%s'
unPort = %d
",
        szHost.c_str(),szUsr.c_str(),szPasswd.c_str(),szDbName.c_str(),szTableName.c_str(),unPort);
    return 0;
}

测试文件:

{
    host:192.168.75.134,
    port:3306,
    user:sdo,
    passwd:123456,
    dbname:sdo_config,
    tablename:sdo_item
}

测试结果:

szHost = '192.168.75.134'
szUsr = 'sdo'
szPasswd = '123456'
szDbName = 'sdo_config'
szTableName = 'sdo_item'
unPort = 3306