配置文件读取的简要C/C++代码

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经常涉及到配置文件，经常要用，来写个代码，欢迎挑刺指正，环境是linux/g++, 代码如下(配置文件的每行用"="分割)：

#include <iostream>#include <map>#include <string>#include <fstream>using namespace std;void deleteAllMark(string &s, const string &mark){unsigned int nMarkSize = mark.size();while(1){unsigned int pos = s.find(mark);if(pos == string::npos){return;}s.erase(pos, nMarkSize);}}int getConfigInfoFromFile(const string &filename, map<string, string> &mapInfo){ifstream in(filename.c_str());string line;if(in){while (getline (in, line))  // line不包含'\n'{ // 去掉注释unsigned int pos = line.find("//");if(pos != string::npos){line.erase(pos, line.size() - pos);}deleteAllMark(line, " ");deleteAllMark(line, "\t");pos = line.find("=");if(pos == string::npos){continue;}string key = line.substr(0, pos);string value = line.substr(pos, line.size() - pos);value.erase(0, 1);// 兼容Windows直接复制过来的文件(非常重要)unsigned int nSize = value.size();if(nSize > 0 && value[nSize - 1] == '\r'){value = value.substr(0, nSize - 1);}if(!key.empty() && !value.empty()){mapInfo[key] = value;}}return 0;}return -1;}int main(){string filename = "test.cfg";map<string, string> mapInfo;int iRet = getConfigInfoFromFile(filename, mapInfo);if(iRet != 0){cout << "file error" << endl;return -1;}for(map<string, string>::iterator it = mapInfo.begin(); it != mapInfo.end(); ++it){cout << it->first << "=" << it->second << endl;}return 0;}

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